JP6609930B2 - Gas nozzle - Google Patents

Description

  The present invention relates to a gas nozzle.

  In laser welding where welding is performed using a laser beam, welding can be performed while shielding the welded part from the air with an inert gas called shield gas in order to suppress oxidation caused by the metal at the welded part coming into contact with the outside air. A welding apparatus that can be used is known (see, for example, Patent Document 1). Such shielding gas is supplied to a gas nozzle through piping for shielding gas from an external cylinder etc., for example.

Japanese Patent Laying-Open No. 2005-111498

  Here, since the shield gas supplied to the gas nozzle through the pipe is normally turbulent, the shield gas released from the gas nozzle may also be turbulent. In this case, the shielding gas is entrained in the weld pool formed by melting the metal of the welded part, for example, the appearance defect of the welded part, the unevenness of the welding depth, and the bubbles inside the welded part. There is a problem that defective welding such as generation of porosity occurs.

  The present invention has been made to solve the above problems, and an object thereof is to provide a gas nozzle capable of discharging a rectified gas.

  In order to achieve the above object, a gas nozzle according to an aspect of the present invention is disposed on a wall surface having a facing region that is disposed to face an introduction port into which gas is introduced, and at a location different from the facing region, A plurality of holes formed through the wall surface in a direction intersecting with the wall surface.

  Thereby, the gas introduced from the introduction port changes the flow direction by colliding with the facing region of the wall surface, and is dispersed from the facing region and flows along the wall surface. For this reason, the gas dispersed from the facing region is less affected by variations in the flow rate of the gas introduced from the inlet, and is dispersed at a uniform flow rate. Further, the gas dispersed from the opposed region is less affected by variations in the flow direction of the gas introduced from the introduction port because the flow direction is changed in the opposed region. When the gas flowing in a distributed manner from the facing region reaches each of the plurality of holes intersecting the wall surface, the gas flows through the holes by changing the flow along the inner wall of the reached hole. The direction is made uniform. Therefore, the gas that has passed through the plurality of holes becomes a gas with uniform flow velocity and flow direction. That is, according to this aspect, the rectified gas can be discharged.

  Further, each of the plurality of holes may be independent from each other.

  Thereby, since gas does not interfere in the plurality of holes, the flow velocity and the flow direction of the gas passing through the plurality of holes can be made more uniform. That is, the rectified gas can be discharged with a smaller variation.

  In addition, each of the plurality of holes may be formed to open to a surface having the facing region among the wall surfaces.

  According to this, since the plurality of holes are formed to open on the surface having the opposing region (the same surface as the opposing region), the gas whose flow direction has been changed by hitting the opposing region of the wall surface can be smoothly It can be led to the hole. Therefore, the gas rectified with low loss can be released.

  In addition, each of the plurality of holes may be formed to open to another surface of the wall surface that is continuous with the surface having the facing region.

  According to this, the plurality of hole portions open, for example, in a surface formed at a different height from the surface having the opposed region. Even in this configuration, the rectified gas can be discharged in the same manner as in the case where the plurality of holes are formed to open on the surface having the opposing region.

  In addition, the plurality of holes may be arranged at radial positions centering on the facing region.

  Here, the gas introduced from the inlet port collides with the opposing region of the wall surface and is dispersed radially around the opposing region. For this reason, the flow rate of the gas which reaches | attains a several hole part can be made more uniform by arrange | positioning a several hole part to the radial position centering on an opposing area | region. Therefore, the flow velocity of the gas passing through the plurality of holes can be made more uniform. That is, the rectified gas can be discharged with a smaller variation in flow rate.

  The plurality of holes may be arranged at positions where angles formed by line segments connecting the facing region and each of the plurality of holes are equal.

  Here, as described above, the gas introduced from the introduction port is dispersed radially around the opposing region. For this reason, by arranging the plurality of holes at equal angles with the opposing region as the center, the flow rate distribution of the entire gas passing through the plurality of holes can be made uniform. That is, gas rectified with a uniform flow rate distribution can be released.

  Further, the plurality of holes may be arranged on the same circumference with the opposing region as a center.

  Here, since the gas introduced from the introduction port is dispersed by colliding with the opposing region of the wall surface, the flow rate of the gas passing through each hole becomes smaller as the distance from the opposing region to the hole becomes longer. For this reason, the flow rate of the gas passing through the plurality of holes can be made uniform by arranging the plurality of holes on the same circumference centering on the opposing region. Therefore, the rectified gas can be released while suppressing a local increase / decrease in the flow rate.

  The plurality of holes may have a tube shape.

  Here, if the penetration distances of the plurality of holes are short, the flow direction of the gas passing through the plurality of holes may not be sufficiently uniform. For this reason, since the plurality of holes have a tube shape, the flow direction of the gas can be sufficiently uniformed, so that more rectified gas can be discharged.

  Moreover, the opposing area | region of the said wall surface may be arrange | positioned perpendicularly | vertically with respect to the flow direction of the said gas introduced from the said inlet.

  Here, when the gas introduced from the introduction port collides perpendicularly to the opposing region of the wall surface, the gas is uniformly dispersed from the opposing region to all directions. In other words, if the plurality of holes are arranged at locations different from the facing region, the flow rate of the gas reaching the plurality of holes can be made uniform regardless of the positional relationship between the facing region and the plurality of holes. . Therefore, since the freedom degree of arrangement | positioning of a several hole part can be improved, design and manufacture become easy.

  The gas nozzle includes a first rectification unit and a plurality of second rectification units each including a wall surface having the facing region and the plurality of holes, and each of the plurality of second rectification units includes The facing region may be arranged to face the introduction port through which the gas is introduced through any of the plurality of holes of the first rectifying unit.

  Thereby, the gas rectified by the first rectification unit is further rectified by the second rectification unit. Therefore, the gas rectified with smaller variations can be released.

  ADVANTAGE OF THE INVENTION According to this invention, the gas nozzle which can discharge | release the rectified gas can be provided.

It is a perspective view which shows typically the external appearance of the gas nozzle which concerns on embodiment of this invention. It is a perspective view which shows the component arrange | positioned inside the housing | casing of the gas nozzle which concerns on embodiment of this invention. In embodiment of this invention, it is a disassembled perspective view which shows each component at the time of isolate | separating and disassemble | disassembling the component arrange | positioned in the housing | casing from the main body. It is a perspective view which shows the structure of the rectification body which concerns on embodiment of this invention. It is a perspective view which shows the structure of the rectification | straightening part which concerns on embodiment of this invention. It is a top view which shows the structure of the rectification | straightening part which concerns on embodiment of this invention. It is a top view which shows the flow of the gas in the rectification | straightening part which concerns on embodiment of this invention. It is sectional drawing which shows the flow of the gas in the rectification | straightening part which concerns on embodiment of this invention. It is a figure which shows the flow of the gas in the gas nozzle which concerns on this Embodiment. It is a perspective view which shows the structure of the rectification | straightening part which concerns on the modification 1 of embodiment of this invention. It is sectional drawing which shows the flow of the gas in the rectification | straightening part which concerns on the modification 1 of embodiment of this invention. It is a perspective view which shows the structure of the rectification | straightening part which concerns on the modification 2 of embodiment of this invention. It is a top view which shows the structure of the rectification | straightening part which concerns on the modification 2 of embodiment of this invention. It is a perspective view which shows the structure of the rectification | straightening part which concerns on the modification 3 of embodiment of this invention. It is a perspective view which shows the mode of the welding process using the gas nozzle which concerns on the modification 4 of embodiment of this invention. It is sectional drawing which shows the mode of the welding process using the gas nozzle which concerns on the modification 5 of embodiment of this invention. FIG. 17 is a bottom view of FIG. 16.

  Hereinafter, a gas nozzle according to an embodiment of the present invention will be described with reference to the drawings. Each of the embodiments described below shows a preferred specific example of the present invention. Numerical values, shapes, materials, constituent elements, arrangement positions and connection forms of constituent elements, and the like shown in the following embodiments are merely examples, and are not intended to limit the present invention. In addition, among the constituent elements in the following embodiments, constituent elements that are not described in the independent claims indicating the highest concept of the present invention are described as optional constituent elements that constitute a more preferable embodiment. Moreover, in each figure, a dimension etc. do not correspond exactly | strictly.

(Embodiment)
First, the configuration of the gas nozzle 10 will be described.

  FIG. 1 is a perspective view schematically showing the appearance of a gas nozzle 10 according to an embodiment of the present invention. As shown in FIG. 1, the gas nozzle 10 includes a casing 100 that includes a lid body 110 and a main body 120 covered with the lid body 110. FIG. 2 is a perspective view showing components disposed inside the housing 100 of the gas nozzle 10 according to the embodiment of the present invention. Specifically, FIG. 2 is a perspective view showing a configuration in a state where the lid 110 of the housing 100 is separated from the gas nozzle 10. FIG. 3 is an exploded perspective view showing each component when the components arranged inside the casing 100 are separated from the main body 120 and disassembled.

  In FIG. 2 and the subsequent drawings, for convenience of explanation, the Z-axis direction is shown as the vertical direction, and there are places where the Z-axis direction is described as the vertical direction. The axial direction is not always the vertical direction. Further, in the present specification, in the case of gas flow, the upper side and the lower side include the meanings of the upstream side and the downstream side, respectively.

  The gas nozzle 10 discharges the gas introduced into the introduction port 11 from the outside of the gas nozzle 10 through, for example, a pipe or the like, from the discharge port 12. Here, the gas introduced into the introduction port 11 is a turbulent flow (unsteady flow) including, for example, a drift flow or a swirl flow whose flow velocity, pressure, streamline, or the like changes. The gas nozzle 10 rectifies such turbulent flow into a steady flow and discharges it from the discharge port 12.

  The gas nozzle 10 is, for example, a nozzle for spraying shield gas in laser welding. The gas nozzle 10 is not limited to a nozzle for spraying shield gas, and may be a nozzle for spraying assist gas in arc welding, or a nozzle for spraying combustion gas such as oxygen in gas welding. It may be.

  As shown in FIG. 1, the gas nozzle 10 includes a casing 100, and as shown in FIG. 2, a branching body 200, a rectifying body 300, and a rectifying network 400 are accommodated inside the casing 100. ing.

  In addition to the above configuration, the gas nozzle 10 may be provided with a spacer or the like between the casing 100 and each component inside the casing 100.

  The housing 100 includes a lid 110 that is a plate-like member, and a main body 120 that is covered with the lid 110 except for the introduction port 11 and the discharge port 12. The housing 100 holds the rectifier 300 and the like by housing the rectifier 300 and the like, and then fixing the lid 110 and the main body 120 with screws or the like. The material of the lid body 110 and the main body 120 is not particularly limited, but is a metal such as aluminum, an aluminum alloy, or stainless steel.

  The branch body 200 is a member that branches the gas introduced from the outside of the gas nozzle 10 into the introduction port 11 into a plurality (in this embodiment, five), and is arranged in the following order from the top (Z-axis direction plus side). Branching portions 210, 220, 230, and 240 are provided. The branch body 200 branches the gas in the X-axis direction as it goes downward (minus side in the Z-axis direction).

  The branch portion 210 has a recess 211 at a position corresponding to the inlet 11 and a through hole 212 having an opening formed in the bottom surface of the recess 211 and penetrating in the Z-axis direction. It leads to the branch part 220 through the recess 211 and the through hole 212. In this recess 211, packing (not shown) is disposed along the inner wall of the recess. Thereby, it is possible to guide to the branching portion 210 while suppressing leakage of the gas introduced into the introduction port 11.

  The branch part 220 is provided below the branch part 210 (minus side in the Z-axis direction), and has a recess 221 extending in the X-axis direction at a position corresponding to the through-hole 212 and an opening formed in the bottom surface of the recess 221. And a plurality of through holes (two through holes 222 in the present embodiment) penetrating in the Z-axis direction. Thereby, the branch part 220 branches the gas introduced from the through hole 212 into two in the X-axis direction and guides the gas to the branch part 230 via each through hole 222.

  The branch part 230 is provided on the lower side (minus side in the Z-axis direction) of the branch part 220, and has a recess 231 extending in the X-axis direction at a position corresponding to the through hole 222, and an opening is formed in the bottom surface of the recess 231. And a plurality of through holes (four through holes 232 in the present embodiment). As a result, the branching unit 230 further divides the gas branched into two by the branching unit 220 into four on both sides in the X-axis direction, and guides the gas to the branching unit 240 through each through hole 232.

  The branch portion 240 is provided below the branch portion 230 (minus side in the Z-axis direction), and has a recess 241 extending in the X-axis direction at a position corresponding to the through hole 232 and an opening formed in the bottom surface of the recess 241. And a plurality of through-holes (in this embodiment, five through-holes 242). As a result, the branching section 240 branches the gas branched into four by the branching section 230 into five further on both sides in the X-axis direction and guides the gas to the rectifying body 300 through the through holes 242.

  As described above, the gas introduced from the introduction port 11 is branched into a plurality (five in the present embodiment) on both sides in the X-axis direction by the branch body 200 and led to the rectifier 300. Here, as described above, the gas introduced from the inlet 11 is turbulent, but is gradually rectified from the upstream side toward the downstream side as it is branched by the branch body 200. However, the branched body 200 cannot be sufficiently rectified, and each of the gases branched by the branched body 200 may be turbulent. That is, a turbulent component may remain in each of the gases guided to the rectifier 300. The rectifying action by the branch body 200 will be described later.

  The rectifying body 300 is provided on the lower side (Z-axis direction negative side) of the branching portion 240, and rectifies and discharges each of the five gases branched by the branching portion 240. The rectifying body 300 includes a plurality of rectifying units (in this embodiment, five rectifying units 310) corresponding to the plurality of through holes 242 of the branching unit 240, and each rectifying unit 310 provides a corresponding through-hole. The gas introduced through the holes 242 is rectified. The detailed configuration of the rectifier 300 will be described later.

  The material of the branch body 200 and the rectifying body 300 is not particularly limited. For example, polypropylene (PP), polyethylene (PE), polyphenylene sulfide (PPS), polyphenylene ether (PPE), acrylic resin, and polymethyl methacrylate resin are used. It is a resin such as (PMMA).

  Moreover, although the number of branches by the branch body 200 and the number of the rectifying units 310 included in the rectifier body 300 are all five in the above description, the number is not limited to this. Further, the gas nozzle 10 may not be provided with the branch body 200 and may be configured such that the gas introduced from the introduction port 11 is directly guided (collised) to the rectifying body 300.

  The rectifying network 400 is provided on the lower side (minus side in the Z-axis direction) of the rectifying body 300 and includes, for example, a plurality of meshes sandwiched between the frame bodies 441 and 442. The rectifying network 400 is discharged from the rectifying body 300. The gas is rectified by permeating the generated gas. As a result, the gases released from the rectifier 300 are combined into one and discharged from the discharge port 12 of the gas nozzle 10.

  Specifically, although the gas discharged from the rectifier 300 is rectified, the gas flow is not integrated into one as a whole. Therefore, by providing the rectifying network 400 and allowing the emitted gas to permeate from the rectifying body 300, it is possible to combine them into one gas flow.

  The material of the rectifying network 400 is not particularly limited, and is, for example, a metal such as aluminum, aluminum alloy, stainless steel, or copper. Further, the rectifying network 400 is not limited to a configuration including a plurality of meshes, and may be a configuration including a single mesh, a plate member processed with micropores, or a metal It may be a porous plate-like member obtained by sintering the powder.

  Next, the configuration of the rectifier 300 will be described in detail. FIG. 4 is a perspective view showing the configuration of the rectifying body 300 according to the embodiment of the present invention. FIG. 5 is a perspective view showing the configuration of the rectifying unit 310 according to the embodiment of the present invention. In FIG. 5, a member such as a resin constituting the rectifying unit 310 is shown in a transparent manner. Further, for convenience of explanation, the through hole 242 provided in the branch portion 240 is illustrated, and the discharge port 243 that is the opening on the negative side in the Z-axis direction of the through hole 242 and the discharge port 243 are opposed to each other. The opposing area AR1 of the rectifying unit 310 is hatched with dots. Further, in FIG. 5, the flow of the gas G <b> 24 introduced through the through hole 242 is illustrated by arrows.

  As shown in FIG. 4, the rectifying body 300 includes five rectifying units 310 arranged side by side in the X-axis direction.

  As illustrated in FIG. 5, the rectifying unit 310 includes a wall surface 320 and a plurality of through holes (in this embodiment, ten through holes) formed through the wall surface 320 in a direction intersecting the wall surface 320. 330). For example, the rectifying unit 310 is formed by cutting a member formed of resin or the like.

  Here, since the gas G24 is introduced into the rectifying unit 310 through the corresponding through hole 242 of the branching unit 240, the introduction port into which the gas is introduced in the rectifying unit 310 is the discharge port 243 of the through hole 242. It becomes.

  A concave portion 340 having a wall surface 320 as a bottom surface is formed on the branching portion 240 side (Z-axis direction plus side) of the rectifying unit 310, and the concave portion 340 is viewed from above (viewed from the Z-axis direction plus side). Are arranged so that the through holes 242 of the branching portion 240 are located. With such a configuration, the gas G24 introduced by the through hole 242 collides with the wall surface 320.

  Similarly, a concave portion 350 is also formed on the rectifying network 400 side (Z-axis direction negative side) of the rectifying unit 310. That is, the rectifier 300 is configured to be vertically symmetrical (symmetric in the Z-axis direction). With such a configuration, it is not necessary to adjust the orientation of the rectifying body 300 when the rectifying body 300 is accommodated in the housing 100.

  The wall surface 320 has an opposing area AR1 facing the discharge port 243 of the through hole 242, and an opening 331 formed by a plurality of through holes 330 arranged at a location different from the opposing area AR1 is arranged. That is, the opening 331 by the plurality of through holes 330 is not formed in the facing area AR1.

  The facing area AR <b> 1 is generally a projected portion of the discharge port 243 onto the wall surface 320. However, the facing area AR1 may not be completely the same as the projection part, may be slightly larger (for example, about 10% in area ratio) than the size of the projection part, and somewhat different from the shape of the projection part. May be different.

  The facing area AR1 is arranged perpendicular to the flow direction of the gas G24 introduced from the discharge port 243. Here, the “gas flow direction” refers to the direction of the main flow of the gas. In other words, it refers to the axial direction of the flow path through which the gas flows. That is, the flow direction of the gas G24 refers to the axial direction of the through hole 242. In the present embodiment, the facing area AR1 is arranged in parallel to the XY plane perpendicular to the axial direction (Z-axis direction) of the through hole 242.

  Each of the plurality of through-holes 330 is disposed at a location different from the facing area AR1, and is formed to penetrate the wall surface 320 in a direction intersecting the wall surface 320 (a direction orthogonal in the present embodiment). That is, each of the plurality of through-holes 330 is arranged in different directions as viewed from the facing area AR1. In other words, each of the plurality of through holes 330 is arranged at a position where the straight lines connecting the through hole 330 and the facing area AR1 do not overlap each other.

  Each through-hole 330 is formed so as to communicate the recess 340 and the recess 350. That is, the through hole 330 has an opening 331 on the wall surface 320 that is the bottom surface of the recess 340 and an opening 332 on the bottom surface of the recess 350.

  Thus, each of the plurality of through-holes 330 is formed to open to a surface (in the present embodiment, the wall surface 320 itself) having the facing area AR1 in the wall surface 320. In other words, the portion of the wall surface 320 where the facing region AR1 is disposed and the portion where the opening 331 is disposed by each of the plurality of through holes 330 are the same surface. That is, these portions are arranged at the same height (the same position in the Z-axis direction).

  In the present embodiment, each of the plurality of through holes 330 is independent of each other. That is, the gas flowing in one through hole 330 among the plurality of through holes 330 does not interfere with the gas flowing in the other through hole 330.

  Each through-hole 330 has a tubular shape in the present embodiment. Here, the “tube shape” refers to a hollow and elongated structure. For example, when the size in the tube axis direction is H and the size (inner diameter) in the direction perpendicular to the tube axis direction is D, the tube shape is specifically specified. Indicates that H / D satisfies 3 or more, and more specifically indicates that H / D satisfies 5 or more.

  In the present embodiment, each through-hole 330 has a circular tube shape with a constant inner diameter in the vertical direction (Z-axis direction). The shape of the through-hole 330 is not limited to this, and may be a tapered shape in which the inner diameter decreases as it goes downward (minus in the Z-axis direction), or cut in a horizontal plane (XY plane) instead of a circular pipe shape. The tube shape may be a polygonal cross section.

  In this embodiment, the total area of the plurality of openings 331 is larger than the area of the discharge port 243. The total area of the plurality of openings 331 may be equal to the area of the discharge port 243 or may be smaller than the area of the discharge port 243.

  FIG. 6 is a top view showing the configuration of the rectifying unit 310 according to the embodiment of the present invention. In the figure, for convenience of explanation, each of the opposing area AR1 and the wall 320 excluding the opposing area AR1 is hatched with dots.

  As shown in the figure, the plurality of through-holes 330 (in this embodiment, ten through-holes 330) are arranged at radial positions centered on the opposing region AR1. Here, “arranged in a radial position” means that it is located in an approximately opposite direction with respect to an arbitrary point. Specifically, it is arranged in all directions around an arbitrary point. Or, it refers to being arranged in all directions around an arbitrary point.

  Note that “centering on the facing area” specifically means that the center of the facing area (for example, the center of gravity, etc.) is the center position, and in the present embodiment, the facing area AR1 that is circular. This means that the center ARc of the circle is the center position.

  More specifically, the plurality of through holes 330 are arranged at positions where the angles θ1 formed by the line segments connecting the opposing area AR1 and each of the plurality of through holes 330 are equal. Specifically, in the present embodiment, the line segment is a line segment that connects the center ARc of the circle of the counter area AR1 and the center of each opening 331 of the plurality of through holes 330.

  In the figure, only the angle formed by the line segment connecting each of the two adjacent through holes 330 out of the ten through holes 330 and the opposing area AR1 is shown as θ1, but the other two adjacent two through holes 330 are illustrated. The same applies to the through hole 330. That is, in the present embodiment in which ten through holes 330 are arranged, θ1≈36 [degree].

  Note that “the angles are equal” only needs to be substantially the same, and may not be completely the same. For example, in the present embodiment, θ1 may be in a range satisfying 31 ≦ θ1 ≦ 41 [degree].

  Further, the plurality of through holes 330 are arranged on the same circumference with the opposing area AR1 as the center. In the figure, each of the ten through holes 330 is disposed on the same circumference having a radius D1 with the center ARc of the counter area AR1 as the center.

  Note that “arranged on the same circumference” means that the distances from the center position are substantially the same, and may not be completely the same. For example, in the present embodiment, it is sufficient that the distance from each of the plurality of through holes 330 to the center of the facing area AR1 is within 5% of the average distance. Moreover, the center of the through-hole 330 does not need to be located on the same circumference, and at least one part of the through-hole 330 should just be located on the same circumference.

  In the present embodiment, each of the plurality of through-holes 330 is formed so as to penetrate in the vertical direction (Z-axis direction), so that the wall surface 320 is equally spaced on the same circumference centered on the opposing area AR1. A plurality of openings 331 are arranged.

  With such a configuration of the rectification unit 310, the gas G <b> 24 introduced into the rectification unit 310 is rectified by the through hole 242. Hereinafter, the rectification mechanism by the rectification unit 310 will be described.

  FIG. 7 is a top view showing a gas flow in rectifying unit 310 according to the embodiment of the present invention. FIG. 8 is a cross-sectional view showing a gas flow in rectifying unit 310 according to the embodiment of the present invention. Specifically, this figure is a cross-sectional view taken along the line A-A 'of FIG. In the figure, the branching portion 240 is also shown.

  As shown in these drawings, the gas G24 introduced from the discharge port 243 of the through-hole 242 to the rectifying unit 310 becomes a gas G31 that collides with the opposing region AR1 and diffuses. That is, the gas G24 is changed to the gas G31 that radially spreads from the facing area AR1 by changing the flow direction by hitting the facing area AR1. That is, the gas G31 diffuses concentrically around the opposing area AR1.

  Here, as described above, the turbulent component may remain in the gas G24 guided by the through hole 242. In this case, a turbulent component remains in the gas immediately before hitting the counter area AR1. On the other hand, the gas G31 after the gas G24 collides with the counter area AR1 flows (diffuses) from the counter area AR1 along the wall surface 320, and thus the flow direction of the gas G31 is changed from the counter area AR1 to the wall surface 320. The flow rate of the gas G31 is less affected by variations in the flow rate of the gas G24.

  Thereafter, when the gas G31 is diffused and reaches the openings 331 of the plurality of through holes 330, the gas G31 changes the flow direction and flows in the through holes 330.

  Here, as described above, since the through-hole 330 has a tube shape, the gas G31 flowing through the through-hole 330 moves in the tube axis direction of the through-hole 330 as the gas G31 travels downward (Z-axis direction minus side). (Z-axis direction).

  Thereby, the flow direction of the gas G31 discharged from the opening 332 on the lower side (Z-axis direction minus side) of the through-hole 330 is the Z-axis direction minus side. Therefore, the gas G31 released from each of the plurality of through holes 330 is released so as not to collide (interfere) with each other.

  Therefore, the gas discharged from the rectifying unit 310 (a set of gases G31) is a steady flow. That is, each rectifier 310 rectifies and discharges the gas G24 introduced through the corresponding through hole 242.

  Thus, the rectifier 300 including the plurality of rectification units 310 (in this embodiment, five rectification units 310) rectifies the gas branched by the branching unit 240.

  FIG. 9 is a diagram showing a gas flow in the gas nozzle 10 according to the present embodiment. In the figure, a member such as a resin constituting the branching body 200 or the rectifying body 300 is seen through with the lid 110 removed.

  As shown in the figure, the gas Gin introduced into the introduction port 11 of the gas nozzle 10 is sequentially branched from the gas G21 by the branch portions 210 to 240 into five gases G24.

  Since the five branched gases G24 as a whole have a width larger than the width of the gas Gin (the size in the X-axis direction), the gas nozzle 10 can discharge the gas over a wide range. For example, when the gas nozzle 10 is a nozzle for spraying shield gas in laser welding, the shield gas can be sprayed over a wide range in the X-axis direction, so that oxidation of the metal at the welded portion can be effectively suppressed. Therefore, in this case, high welding quality can be ensured.

  Each of the branched five gases G24 is discharged as the gas G31 rectified by the rectifier 300 as described above.

  The gas G31 discharged from the rectifier 300 is transmitted through the rectifier network 400, and is collected into one rectified gas Gout and discharged from the discharge port 12.

  As described above, the rectifying action is exhibited not only in the rectifying body 300 but also in the branch portions 220 to 240 of the branch body 200.

  That is, in the branching part 220, the gas G21 introduced from the discharge port 213, which is the lower opening of the through hole 212 of the branching part 210, collides with the bottom surface of the recess 221 and diffuses to become the gas G22. . The branched gas G22 is rectified and discharged by passing through each through hole 222.

  Further, in the branching portion 230, the gas G22 introduced from the discharge port 223, which is the lower opening of the through hole 222 of the branching portion 220, collides with the bottom surface of the recess 231 and diffuses to become the gas G23. . Then, the branched gas G23 is rectified and discharged by passing through each through hole 232.

  In addition, in the branching portion 240, the gas G23 introduced from the discharge port 233, which is the lower opening of the through hole 232 of the branching portion 230, collides with the bottom surface of the recess 241 and diffuses to become the gas G24. . The branched gas G24 is rectified and discharged by passing through each through hole 242.

  As described above, each of the branch portions 220 to 240 has a wall surface having a facing region arranged corresponding to the inlets (discharge ports 213 to 233) into which the gases G21 to G23 are introduced, like the rectifier 310. The bottom surfaces of the recesses 221 to 241) and a plurality of hole portions (through holes 222 to 242) that are disposed at different locations from the facing region and that penetrate the wall surface in a direction intersecting the wall surface. .

  That is, the gas nozzle 10 according to the present embodiment includes a rectification unit configured in multiple stages by the branch units 220 to 240 and the rectification body 300. That is, each of the branch parts 220 to 240 is included in the “first rectification part” described in the claims. Furthermore, each of the branching units 230 and 240 and the rectifying unit 310 is included in the “second rectifying unit” recited in the claims.

  As described above, the gas nozzle 10 according to the present embodiment includes the wall surface 320 having the facing region AR1 disposed to face the inlet (in this embodiment, the outlet 243) into which the gas G24 is introduced, A plurality of hole portions (a plurality of through holes 330 in the present embodiment) are provided at positions different from the facing area AR1 and formed through the wall surface 320 in a direction intersecting the wall surface 320.

  Thus, the gas G24 introduced from the discharge port 243 changes the flow direction by hitting the facing area AR1 of the wall surface 320, and is dispersed from the facing area AR1 and flows along the wall surface 320. For this reason, the gas G31 dispersed from the facing area AR1 is not easily affected by variations in the flow rate of the gas G24 introduced from the discharge port 243, and is dispersed at a uniform flow rate. Further, the gas G31 dispersed from the facing area AR1 is less affected by variations in the flow direction of the gas G24 introduced from the discharge port 243 because the flow direction is changed in the facing area AR1. When the gas G31 flowing in a distributed manner from the facing area AR1 reaches each of the plurality of through holes 330 intersecting the wall surface 320, the flow is changed along the inner wall of the reached through hole 330 to change the through hole 330. By passing through, the flow direction becomes uniform. Therefore, the gas G31 that has passed through the plurality of through holes 330 becomes a gas having a uniform flow velocity and flow direction. That is, the gas nozzle 10 according to the present embodiment can release the rectified gas.

  In addition, each of the plurality of through holes 330 is independent of each other.

  Thereby, since gas G31 does not interfere in a plurality of penetration holes 330, the flow velocity and the flow direction of gas G31 which passed through a plurality of penetration holes 330 can be made more uniform. That is, the rectified gas can be discharged with a smaller variation.

  Further, the plurality of through holes 330 are formed to open on the surface of the wall surface 320 having the facing area AR1.

  According to this, since the plurality of through-holes 330 are formed to open on the surface having the opposing region AR1 (the same surface as the opposing region AR1), the gas whose flow direction has been changed by hitting the opposing region AR1 of the wall surface 320. G31 can be smoothly guided to each through-hole 330. Therefore, the gas rectified with low loss can be released.

  Further, the plurality of through holes 330 are arranged at radial positions centered on the facing area AR1.

  Here, the gas G24 introduced from the discharge port 243 collides with the opposing area AR1 of the wall surface 320, and is dispersed radially around the opposing area AR1. For this reason, in the present embodiment, the flow rate of the gas G31 reaching the plurality of through-holes 330 can be made more uniform by arranging the plurality of through-holes 330 at radial positions centering on the facing area AR1. it can. Therefore, the flow rate of the gas G31 that has passed through the plurality of through holes 330 can be made more uniform. That is, the rectified gas can be discharged with a smaller variation in flow rate.

  Further, the plurality of through holes 330 are arranged at positions where the angles formed by the line segments connecting the facing area AR1 and each of the plurality of through holes 330 are equal.

  Here, as described above, the gas G24 introduced from the discharge port 243 is radially dispersed around the counter area AR1. For this reason, in the present embodiment, by arranging the plurality of through holes 330 at equal angles with the opposing region AR1 as the center, the flow rate distribution of the entire gas G31 passing through the plurality of through holes 330 is made uniform. Can do. That is, gas rectified with a uniform flow rate distribution can be released.

  Further, the plurality of through holes 330 are arranged on the same circumference with the opposing area AR1 as the center.

  Here, the gas G24 introduced from the discharge port 243 is dispersed by colliding with the facing region AR1 of the wall surface 320. Therefore, as the distance from the facing region AR1 to the through hole 330 becomes longer, the gas G31 passing through each through hole 330 is increased. The flow rate becomes smaller. For this reason, in this Embodiment, the flow volume of the gas G31 which passes through the several through-hole 330 can be equalize | homogenized by arrange | positioning the several through-hole 330 on the same periphery centering on opposing area | region AR1. . Therefore, the rectified gas can be released while suppressing a local increase / decrease in the flow rate.

  Each of the plurality of through holes 330 has a tube shape.

  Here, if the penetration distance of the plurality of through holes 330 is short, the flow direction of the gas G31 passing through the plurality of through holes 330 may not be sufficiently uniform. For this reason, in this Embodiment, since the several hole part has a pipe | tube shape, since the flow direction of gas G31 can fully be equalize | homogenized, more rectified gas can be discharge | released.

  Further, the facing area AR1 of the wall surface 320 is disposed perpendicular to the flow direction of the gas G24 introduced from the discharge port 243.

  Here, when the gas G24 introduced from the discharge port 243 collides perpendicularly to the facing area AR1 of the wall surface 320, the gas G24 is evenly dispersed from the facing area AR1 in all directions. That is, if the plurality of through-holes 330 are arranged at locations different from the facing area AR1, the flow rate of the gas G31 reaching the plurality of through-holes 330 is controlled regardless of the positional relationship between the facing area AR1 and the plurality of through-holes 330. It can be made uniform. Therefore, since the freedom degree of arrangement | positioning of the several through-hole 330 can be improved, design and manufacture become easy.

  The gas nozzle 10 includes a first rectification unit and a plurality of second rectification units each including a wall surface having a facing region and a plurality of holes, and the plurality of second rectification units each have a facing region that each has. The first rectification unit is disposed to face the introduction port through which the gas is introduced through any of the plurality of holes.

  Thereby, the gas rectified by the first rectification unit is further rectified by the second rectification unit. Therefore, the gas rectified with smaller variations can be released.

  Further, in the present embodiment, in the branch portion 230, the discharge ports 223 of the plurality of through holes 222 that are introduction ports for introducing the gas G22 into the branch portion 230 are connected to each other by the space inside the recess 231. ing. That is, the gas G22 discharged from one discharge port 223 and the other discharge ports are formed by a space (a space inside the recess 231) formed by contacting the lower surface of the branch portion 220 and the upper surface of the branch portion 230. The gas G <b> 22 released from the H <b> 223 is mixed, and the mixed gas G <b> 23 flows through each through hole 232.

  Further, in the branching portion 240, similarly to the branching portion 230, the discharge ports 233 are connected to each other by the space inside the concave portion 241, so that the gas G23 discharged from one discharge port 233 and the other discharge ports 233. The gas G23 released from the gas is mixed and flows in each through hole 242.

  On the other hand, in the rectifying body 300, the discharge ports 243 of the plurality of through holes 242 that are introduction ports for introducing the gas G24 into the plurality of rectifying units 310 are blocked by walls. That is, the gas G24 discharged from one discharge port 243 and the other discharge port 243 are released by the wall formed by contacting the lower surface of the branching portion 240 and the upper surface of the rectifier 300. It is separated from the gas G24 without interference.

  For this reason, the gas G <b> 24 discharged from the discharge port 243 of one through hole 242 is introduced only into one rectifying unit 310 corresponding to the through hole 242, and is not introduced into the other rectifying units 310. That is, in the plurality of rectifying units 310 of the rectifying body 300, the gases G24 introduced from mutually different through holes 242 pass through each through hole 330 without being mixed.

  That is, in each of the branch parts 230 and 240, the introduction ports (discharge ports 223 and 233) through which the gas is introduced and the through holes through which the gas introduced from the introduction port passes correspond to “many-to-many”. . On the other hand, in the rectifier 300, the introduction port (discharge port 243) through which the gas is introduced and the through-hole 330 through which the gas introduced from the introduction port passes correspond to “one-to-many”.

  As described above, in the rectifier 300, the gas G24 introduced from the plurality of discharge ports 243 passes through the through-hole 330 without being mixed, and therefore the rectifier 300 is more effective than the rectification action by the branch portions 230 and 240. In addition, the introduced gas G24 can be rectified.

  In each of the branching section 230 and the branching section 240, similarly to the rectifier 300, gas is introduced from each inlet so that the gas introduced from the inlets (discharge ports 223 and 233) is not mixed. A wall portion that blocks the space may be provided. Thereby, the rectification effect | action in each of the branch part 230 and the branch part 240 can be improved further.

(Modification 1)
Next, Modification 1 of the embodiment of the present invention will be described. In the above embodiment, the plurality of through holes 330 are formed so as to open to the surface of the wall surface 320 having the facing area AR1. That is, in the wall surface 320, the portion where the facing region AR1 is disposed and the portion where the opening 331 is disposed by each of the plurality of through holes 330 are the same surface. On the other hand, in the present modification, the plurality of through holes are formed to open on a surface different from the surface on which the facing area AR1 is disposed.

  FIG. 10 is a perspective view showing a configuration of a rectifying unit 310A according to Modification 1 of the embodiment of the present invention. In the figure, a member such as a resin constituting the rectifying unit 310A is shown in a transparent manner. Further, for convenience of explanation, dots are hatched in the facing area AR1 facing the discharge port 243 of the through hole 242 provided in the branching portion 240.

  As shown in the drawing, a concave portion 340A having a wall surface 320A as a bottom surface is formed on the branching portion 240 side (Z-axis direction plus side) of the rectifying portion 310A.

  Recess 340A has a bottom surface with a peripheral portion higher (shallow) than wall portion 320A, as compared to recess 340 in the embodiment, as a wall surface 320A. That is, the wall surface 320 </ b> A is a first surface 321 that is a surface having the facing area AR <b> 1, and another surface that is continuous with the first surface 321, and has a height different from the first surface 321 (a position that differs in the Z-axis direction) ) Provided on the second surface 322.

  In the present modification, each of the plurality of through holes 330 is formed to open on the second surface 322. That is, each of the plurality of through-holes 330 is formed to open to another second surface 322 that is continuous with the first surface 321 having the facing area AR1 in the wall surface 320A.

  FIG. 11 is a cross-sectional view showing a gas flow in rectifying unit 310A according to Modification 1 of the embodiment of the present invention. Specifically, FIG. 10 is a cross-sectional view of the rectifying unit 310 shown in FIG. 10 in a cross section corresponding to the cross section A-A ′ of FIG. 6. In the figure, the branching portion 240 is also shown.

  As shown in the figure, the gas G31 after the gas G24 introduced into the rectifying unit 310 from the discharge port 243 collides with the counter area AR1 flows (diffuses) along the first surface 321 from the counter area AR1. Therefore, the flow direction of the gas G31A is a direction extending from the facing area AR1 along the first surface 321, and the flow rate of the gas G31A is not easily affected by variations in the flow rate of the gas G24.

  After that, when the gas G31A reaches the opening 331 of each of the plurality of through holes 330 by overcoming the step between the first surface 321 and the second surface 322 while maintaining the flow direction in the XY plane, It flows in 330.

  Accordingly, in the present modification, the gas G31A released from the opening 332 on the lower side (Z-axis direction minus side) of the through-hole 330 has a flow direction of the Z-axis direction minus side as in the gas G31 in the embodiment. Become.

  Therefore, the gas discharged from the rectifying unit 310A (a set of gases G31A) is a steady flow. That is, the rectifying unit 310A can rectify and release the gas G24 introduced through the through hole 242 as in the rectifying unit 310 in the embodiment.

  Therefore, according to the gas nozzle according to the present modification including the rectifying unit 310A, in the rectifying unit 310A, each of the plurality of through holes 330 is connected to the second surface 321 of the wall surface 320A that is continuous with the first surface 321 having the facing area AR1. Even in the case where the surface 322 is opened, the same effects as those in the above embodiment can be obtained.

  Moreover, in this modification, the standing wall which uses the 2nd surface 322 as a ceiling surface around the opposing area | region AR1 is provided. That is, in this modification, the wall part standingly arranged by the 1st surface 321 which has opposing area | region AR1 is arrange | positioned.

  By providing the standing wall in this way, the flow of the gas G24 introduced from the discharge port 243 to the rectifying unit 310A is blocked by the standing wall. Therefore, since the space below the discharge port 243 (the space inside the recess 340A) is easily filled with the gas G24, the sum of the areas of the plurality of openings 331 is relatively large with respect to the area of the discharge port 243. Also, a high rectifying action can be achieved.

(Modification 2)
Next, a second modification of the embodiment of the present invention will be described. In the above embodiment, each of the plurality of through holes 330 is independent of each other. On the other hand, in this modification, at least two or more of the plurality of through holes 330 (five in this modification) communicate with each other to form one through hole.

  FIG. 12 is a perspective view showing a configuration of a rectifying unit 310B according to Modification 2 of the embodiment of the present invention. In the figure, a member such as a resin constituting the rectifying unit 310B is shown in a transparent manner. Further, for convenience of explanation, dots are hatched in the facing area AR1 facing the discharge port 243 of the through hole 242 provided in the branching portion 240.

  FIG. 13 is a top view showing a configuration of a rectifying unit 310B according to Modification 2 of the embodiment of the present invention. In the figure, for convenience of explanation, each of the opposing area AR1 and the wall 320 excluding the opposing area AR1 is hatched with dots.

  Each through-hole 330B shown in these drawings has, for example, a slit shape corresponding to a configuration in which five adjacent through-holes 330 communicate with each other in the above embodiment.

  According to the rectification unit 310B according to the present modification configured as described above, the same effects as those of the above-described embodiment can be obtained. Therefore, according to the gas nozzle which concerns on this modification provided with this rectification | straightening part 310B, there can exist an effect similar to the said embodiment.

(Modification 3)
Next, a third modification of the embodiment of the present invention will be described. In the above-described embodiment, the plurality of through holes 330 are arranged on the same circumference with the opposing region AR1 as the center. On the other hand, in the present modification, the plurality of through holes are arranged on a square circumference centered on the opposing area AR1.

  FIG. 14 is a perspective view showing a configuration of a rectifying unit 310C according to Modification 3 of the embodiment of the present invention. In the figure, a member such as a resin constituting the rectifying unit 310C is shown in a transparent manner. Further, for convenience of explanation, dots are hatched in the facing area AR1 facing the discharge port 243 of the through hole 242 provided in the branching portion 240.

  As shown in the figure, in the present modification, the plurality of through holes 330 are arranged on a square circumference centering on the opposing area AR1.

  According to the rectification unit 310C according to the present modification configured as described above, the same effect can be achieved although there is a local increase / decrease in the flow rate as compared with the above embodiment. Therefore, according to the gas nozzle which concerns on this modification provided with this rectification | straightening part 310C, although there is a local increase / decrease in flow volume, the same effect can be show | played.

  Here, the difference between the distance to the opening 331 of the through hole 330 farthest from the center of the counter area AR1 among the plurality of through holes 330 and the distance to the opening 331 of the nearest through hole 330 is ΔD, When the penetration distance (size in the Z-axis direction) is L, L >> ΔD (for example, L is 20 times or more of ΔD) may be satisfied. In this case, the rectifying unit 310C can exhibit the same configuration as that of the above-described embodiment by suppressing local increase and decrease of the flow rate.

(Modification 4)
Next, Modification 4 of the embodiment of the present invention will be described.

  In the said embodiment and the modifications 1-3, the structure of the gas nozzle was demonstrated in detail. Such a gas nozzle is used, for example, to spray a shield gas in laser welding. The gas nozzle according to the present modification is any one of the above-described embodiment and Modifications 1 to 3.

  Hereinafter, in this modification, the case where the gas nozzle is used for spraying shield gas in the welding process of the liquid stopper of the electricity storage element will be described as an example.

  FIG. 15 is a perspective view illustrating a welding process using the gas nozzle 20 according to the fourth modification of the embodiment of the present invention. In FIG. 15 and the subsequent drawings, for convenience of explanation, the Z′-axis direction is shown as the vertical direction, and there are places where the Z′-axis direction is described as the vertical direction. , The Z′-axis direction is not always the vertical direction.

  The power storage element 50 is a secondary battery that can charge electricity and discharge electricity, and more specifically, is a non-aqueous electrolyte secondary battery such as a lithium ion secondary battery. For example, the electric storage element 50 is applied to an electric vehicle (EV), a hybrid electric vehicle (HEV), or a plug-in hybrid electric vehicle (PHEV). In addition, the electrical storage element 50 is not limited to a nonaqueous electrolyte secondary battery, A secondary battery other than a nonaqueous electrolyte secondary battery may be sufficient, and a capacitor may be sufficient as it.

  As shown in FIG. 15, the power storage element 50 includes a container 500 including a main body 511 having a rectangular cylindrical shape and a bottom, and a lid 510 that is a plate-like member that closes an opening of the main body 511. The container 500 can seal the inside by welding the lid 510 and the main body 511 after the electrode body and the like are accommodated therein. The material of the lid 510 and the main body 511 is not particularly limited, but is preferably a weldable metal such as stainless steel, aluminum, aluminum alloy, for example.

  The lid 510 is provided with a liquid stopper 600 for sealing a liquid injection hole for injecting a liquid such as an electrolytic solution (nonaqueous electrolyte) into the container 500. The liquid stopper 600 is sealed by, for example, laser welding or the like in a welding process after the electrolytic solution is injected. In addition, as long as the electrolyte solution inject | poured into the container 500 does not impair the performance of the electrical storage element 50, there will be no restriction | limiting in particular in the kind, Various things can be selected. The material of the liquid stopper 600 is not particularly limited, but is preferably the same metal as the lid 510.

In the welding process, laser welding is performed while moving the irradiation position of the laser beam L along the periphery of the liquid stopper 600 while the shield gas is blown by the gas nozzle 20. The shield gas is not particularly limited as long as it is an inert gas that can suppress oxidation due to the metal in the welded portion coming into contact with the outside air, and examples thereof include N ₂ gas, Ar gas, and He gas.

  As described above, according to this modification, welding is performed in a state where the shielding gas is blown using the gas nozzle 20 according to the embodiment or the modification.

  Here, the shield gas supplied to the gas nozzle 20 through the pipe 21 is normally turbulent. When the shield gas is sprayed on the welded portion with turbulent flow, the shield gas is entrained in the weld pool formed by melting the metal at the welded portion, for example, the appearance defect of the welded portion, the welding depth There is a possibility that welding quality may be deteriorated due to welding defects such as unevenness of thickness and generation of porosity in which bubbles are generated inside the welded portion.

  On the other hand, in this modification, by using the gas nozzle 20, welding can be performed in a state where a highly rectified shield gas is sprayed, so that high welding quality can be ensured.

(Modification 5)
Next, a fifth modification of the embodiment of the present invention will be described.

  In the said embodiment and the modifications 1-4, the gas nozzle of a shape as shown in FIG. 1 was demonstrated. However, the shape of the gas nozzle is not limited to this. Moreover, the gas nozzle should just have a rectification | straightening part, and does not need to have the branch body 200 and the rectification network 400. FIG.

  Hereinafter, in the present modification, a case where the gas nozzle is used for spraying shield gas in the welding process of the main body 511 of the container 500 of the electricity storage element 50 and the lid 510 will be described as an example.

  FIG. 16 is a cross-sectional view illustrating a welding process using the gas nozzle 20E according to Modification 5 of the embodiment of the present invention. FIG. 17 is a bottom view of FIG. Specifically, these drawings show a welding process for welding the lid 510 and the main body 511 constituting the container 500 of the power storage element 50. In FIG. 17, for convenience of explanation, dot hatching is applied to the wall surface 320 </ b> E and the facing area AR <b> 1 of each rectifying unit 310 </ b> E.

  As shown in these drawings, the gas nozzle 20E according to the present modification includes two rectifying units 310E arranged side by side in the Y′-axis direction. Since the two rectifying units 310E have the same configuration except that the through holes 330E are arranged symmetrically in the Y′-axis direction, only one rectifying unit 310E will be described below.

  The rectifying unit 310E includes a wall surface 320E and a plurality of through holes (13 through holes 330E in the present modification) formed through the wall surface 320E in a direction intersecting the wall surface 320E.

  The wall surface 320E has an opposing area AR1 that faces an introduction port (not shown), and openings formed by a plurality of through holes 330E that are arranged at locations different from the opposing area AR1 are arranged. That is, the counter area AR1 is not formed with openings by the plurality of through holes 330E.

  Each of the plurality of through holes 330E is disposed at a location different from the facing area AR1, and is formed to penetrate the wall surface 320E in a direction intersecting with the wall surface 320 (a direction orthogonal in the present modification). That is, each of the plurality of through holes 330E is disposed in a different direction as viewed from the facing area AR1. In other words, each of the plurality of through holes 330E is arranged at a position where the straight lines connecting the through hole 330E and the facing area AR1 do not overlap each other.

  With such a configuration, according to the gas nozzle 20E according to this modification, the same effects as those of the gas nozzle according to the embodiment and each modification can be obtained. That is, the rectified gas can be released.

  In the present modification, the plurality of through holes 330E are arranged along the outer shape of the container 500 when viewed from below (viewed from the negative side in the Z′-axis direction). With such a configuration, according to the gas nozzle 20E according to the present modification, the shield gas is blown so as to wrap all the container 500 in the circumferential direction when viewed from below (as viewed from the negative side in the Z′-axis direction). Can do.

  In the welding process, laser welding is performed while moving the irradiation position of the laser beam L along the boundary portion between the main body 511 and the lid 510 of the container 500 in a state where the shielding gas is blown by the gas nozzle 20E. As described above, by using the gas nozzle 20E, welding can be performed in a state where a highly rectified shield gas is sprayed, so that high welding quality can be ensured.

  Here, in the case of a configuration in which the shield gas supplied from the pipe is blown while sequentially tracing the flow path provided in the X′Y ′ plane, the place near and far from the supply port to which the shield gas is supplied from the pipe The amount of shielding gas to be sprayed varies. In addition, when the flow path provided in the X′Y ′ plane has a bent portion such as a curve or a corner, a difference in flow occurs between the inside and the outside of the bent portion, so that the speed of the shielding gas in the flow path and Variations occur in the vector. Therefore, there is a problem that turbulent flow is likely to occur without the rectified shield gas being rectified.

  On the other hand, in this modification, after the shielding gas introduced from the inlet (not shown) is collided with the facing area AR1 of the wall surface 320E, the flow direction is changed and dispersed from the facing area AR1, It discharges | emits through each of the some through-hole 330E which cross | intersects the wall surface 320E. Therefore, the shield gas that has passed through the plurality of through holes 330E has a uniform flow velocity and flow direction. That is, the gas nozzle 20E according to this modification can release the rectified shield gas.

(Other variations)
As mentioned above, although the gas nozzle which concerns on embodiment of this invention and its modification was demonstrated, this invention is not limited to this embodiment and its modification.

  That is, it should be considered that the embodiment and its modification disclosed this time are examples in all respects and are not restrictive. The scope of the present invention is defined by the terms of the claims, rather than the description above, and is intended to include any modifications within the scope and meaning equivalent to the terms of the claims. That is, the configuration of the gas nozzle according to the present invention may include at least one of the rectifying units and the branching units 220 to 240 described above.

  Further, for example, the configuration of the third modification of the embodiment may be combined with the configuration of the second modification of the embodiment.

  In the above description, only the rectifying unit included in the rectifying body is arranged with a plurality of through holes at radial positions centered on the opposing region. However, in each of the branch parts 220 to 240, a plurality of through holes are provided. You may arrange | position a hole in the radial position centering on the opposing area | region corresponding to each of the discharge ports 213-233.

  Moreover, in the said modification 1, although the wall standingly arranged by the 1st surface 321 which has opposing area | region AR1 was arrange | positioned in 310 A of rectification | straightening parts, such a wall is arrange | positioned in the branch parts 220-240. It may be done.

  For example, in the branch part 230 described above, a wall is erected on the wall surface (the bottom surface of the recess 231) having an opposing region arranged corresponding to the introduction port (discharge port 223) through which the gas G22 is introduced. That is, the bottom surface of the recess 231 is a first surface that is a surface having a facing region, and another surface that is continuous with the first surface, and has a height different from that of the first surface (different position in the Z-axis direction). And a second surface provided. Thereby, the branch part 230 can exhibit a high rectifying action even when the total area of the openings of the through holes 232 in the recess 231 is relatively larger than the total area of the discharge ports 223.

  In the above description, the plurality of through holes are arranged at radial positions centered on the opposing area AR1. However, the plurality of through-holes only have to be arranged at a location different from the facing area AR1, and for example, the plurality of through-holes may be arranged in substantially the same direction with respect to the facing area AR1.

  In the above description, the plurality of through holes are arranged at positions where the angles formed by the line segments connecting the opposing area AR1 and each of the plurality of hole portions are equal. However, the plurality of through-holes only have to be arranged at radial positions with the opposing area AR1 as the center. For example, the through-holes may be arranged at positions where the angles formed by the line segments are not uniform. This also allows the rectified gas to be released, although the flow distribution of the emitted gas is somewhat non-uniform.

  In the above description, the facing area AR1 is arranged perpendicular to the flow direction of the gas introduced from the inlet. However, the facing area AR1 only needs to be disposed so as to face the introduction port, and may not be perpendicular to the flow direction. That is, it is not necessary to be parallel to the flow direction. This also allows rectified gas to be released, although the degree of freedom of arrangement of the plurality of through holes is somewhat reduced.

  In the above description, the plurality of through holes penetrates perpendicularly to the wall surface. However, the penetration direction of the through hole is not limited to this, and may not be perpendicular to the wall surface.

  In the above description, the rectifying unit is formed by cutting one member, for example. However, the rectifying unit may be configured by a columnar member having a plurality of through holes and a member surrounding the side surface of the columnar member. Further, the plurality of through holes may not be formed in the columnar member but may be voids formed by the columnar member and a member surrounding the side surface of the columnar member.

  Further, in the above description, the rectifying unit includes a plurality of through holes. However, a plurality of first through holes (holes) arranged at locations different from the facing area AR1 are formed by communicating with each other. A second through hole may be provided.

  In the above description, the concave portion 340 is formed on the branching portion 240 side (Z-axis direction plus side) of the rectifying unit 310. However, the rectifying unit 310 is closed except for the discharge port 243 and the opening 331. It is sufficient if a closed space is formed, and a space surrounded by a wall standing on the wall surface having the facing area AR1 may be formed.

  In the above description, the concave portion 350 is formed on the rectifying network 400 side (Z-axis direction negative side) of the rectifying unit 310, but the concave portion 350 may not be formed in the rectifying unit 310. Absent.

  Since the present invention can provide a gas nozzle capable of discharging rectified gas, it can be applied to a welding nozzle gas and a gas nozzle for spraying an assist gas, which are required to suppress turbulent flow.

10, 20, 20E Gas nozzle 11 Inlet port 12 Outlet port 21 Piping 50 Power storage element 100 Housing 110, 510 Lid body 120 Main body 200 Branching bodies 210, 220, 230, 240 Branching portions 211, 221, 231, 241, 340, 340A , 350 Recesses 212, 222, 232, 242, 330, 330B, 330E Through holes 213, 223, 233, 243 Discharge port 300 Rectifier 310, 310A, 310B, 310C, 310E Rectifier 320, 320A, 320E Wall surface 321 First Surface 322 Second surface 331, 332 Opening 400 Rectification network 441 Frame 500 Container 511 Main body 600 Liquid stopper

Claims (6)

A wall surface having an opposing region disposed opposite to an inlet through which gas is introduced;
A plurality of holes formed so as to penetrate the wall surface in a direction intersecting with the wall surface, arranged to surround the periphery of the counter region and different from the facing region ;
A plurality of the introduction ports are provided , and all of the plurality of introduction ports are arranged in a straight line in the direction along the wall surface ,
The wall surface has a plurality of opposing regions arranged to face the plurality of introduction ports,
A plurality of the plurality of holes are arranged corresponding to the plurality of opposed regions. The gas nozzle according to claim 1, wherein each of the plurality of holes is formed by opening in a surface of the wall surface having the facing region. 2. The gas nozzle according to claim 1, wherein each of the plurality of hole portions is formed to open to another surface of the wall surface that is continuous with the surface having the facing region. The gas nozzle according to any one of claims 1 to 3, wherein the plurality of holes are arranged at radial positions centered on the facing region. The gas nozzle according to any one of claims 1 to 4, wherein the plurality of holes are arranged at positions where angles formed by line segments connecting the facing region and each of the plurality of holes are equal. The gas nozzle according to any one of claims 1 to 5, wherein the plurality of holes are arranged on the same circumference with the opposing region as a center.

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