JP5580554B2 - Spray nozzle device and connection structure thereof - Google Patents

Description

  The present invention relates to a spray nozzle (or two-fluid nozzle) device useful for spraying a gas-liquid mixed fluid and its connection structure, in particular, a secondary cooling zone for a slab (or steel material) during hot rolling or continuous casting. The present invention relates to a spray nozzle device useful for spraying gas-liquid mixed mist in the width direction and a connection structure thereof.

  In the cooling zone of the slab (or steel material) in the continuous casting process, there is a spray nozzle (or two-fluid nozzle) for cooling the slab (or steel material) by spraying a gas-liquid mixed mist of water and air. It is used. In the cooling zone, normally, a plurality of spray nozzles are juxtaposed in the slab (or steel) conveying path along the width direction of the slab that is continuously drawn and supplied, and extends over the entire width of the slab. It is cooling. Further, in a single spray nozzle, the spray flow rate has a distribution, and the spray flow rate at both ends is usually smaller than that in the central portion in the width direction. Therefore, in order to cool the slab uniformly in the width direction with a plurality of spray nozzles, a plurality of air bubbles are overlapped at both ends in the width direction of spray patterns (spray areas) of a plurality of adjacent spray nozzles. It is necessary to arrange the liquid mixing spray nozzles in the width direction of the slab and to make the spray region coincide with the width direction of the slab. As such a spray nozzle, a spray nozzle having one or two slit-like discharge holes is used (Japanese Patent Laid-Open No. 2008-168167, Japanese Patent Laid-Open No. 2003-93926, Japanese Patent Laid-Open No. 7-164121, etc.) See).

  In Japanese Patent Publication No. 4-10386 (Patent Document 1), an air supply pipe and a liquid supply pipe are connected to a gas-liquid supply pipe via a mixing adapter, and gas is supplied from a nozzle attached to the tip of the gas-liquid supply pipe. In an apparatus for spraying liquid, a gas-liquid spray apparatus in which the mixing adapter has a specific flow path is disclosed. This document does not directly describe a method of connecting the mixing adapter, the gas-liquid supply pipe, and the nozzle, but generally, a welding or screwing method is used.

  Japanese Patent Laid-Open No. 2001-259383 (Patent Document 2) discloses an injection nozzle assembly that includes a nozzle body and a nozzle tip, and the nozzle tip is detachable from the nozzle body as the nozzle body rotates. The nozzle tip has an elongated discharge orifice adapted to discharge a flat spray pattern, and the nozzle body has a radially extending portion extending outward, the protruding portion being An injection nozzle assembly is disclosed that is arranged in radial alignment with the long axis of the elongated discharge orifice. In this nozzle assembly, a plurality of nozzle tips can be arranged in a predetermined direction on the nozzle body using the major axis of the discharge orifice as an index without directly observing the direction of the discharge orifice. Further, in Patent Document 2, in order to attach the nozzle tip to the nozzle body, the nozzle tip has a locking element extending outward in the radial direction, and the overhanging portion and the locking element are circumferential with respect to each other. It is also described that the direction is shifted by 90 degrees.

  However, even if a spray nozzle is connected to the tip of the gas-liquid supply pipe connected to the mixing adapter and these spray nozzles are arranged in the width direction of the slab, it is difficult to cool the slab uniformly with a plurality of spray nozzles. It is. That is, when the gas-liquid supply pipe is attached to the mixing adapter while being displaced in the circumferential direction, or the spray nozzle is attached to the gas-liquid supply pipe while being displaced in the circumferential direction, The slit-like discharge hole of the spray nozzle is inclined with respect to the (conveying surface), and the distribution of the spray flow rate on the slab changes. Therefore, although it is necessary to install the spray nozzle parallel to the long axis of the slit-like discharge hole of the spray nozzle with respect to the surface of the slab (or the transport surface of the slab), a plurality of connections or attachments for one spray nozzle Since there is a portion (or joint connection portion), it is difficult to position the spray nozzle in a predetermined direction (the long axis of the slit-like discharge hole is parallel) with respect to the surface of the slab. In particular, when a plurality of spray nozzles are arranged side by side, it is necessary to adjust the direction of the spray nozzle for each spray nozzle, and the adjustment work is extremely complicated. In addition, replacement or repair work of the mixing adapter, the gas-liquid supply pipe and / or the spray nozzle is complicated.

  As described above, in order to spray the spray target body or spray area with a uniform flow rate distribution, the direction of the rotation direction of the spray nozzle is adjusted, and the major axis of the discharge hole of the spray nozzle with respect to the spray area or spray target body The directions need to be parallel. However, as described above, it is difficult to easily and easily adjust the direction of the spray nozzle with respect to the spray target (or spray target region). In particular, a plurality of spray nozzles are juxtaposed, and both ends of the spray pattern (spray area) are overlapped so that the gas-liquid mixed mist is sprayed on the spray target body (or spray target area) at a uniform spray flow rate. Have difficulty.

Japanese Patent Publication No. 4-10386 (Claims, FIG. 2) Japanese Patent Laid-Open No. 2001-259483 (Claims, FIG. 6)

  Therefore, the objective of this invention is providing the connection structure of the spray nozzle apparatus which can adjust the direction of the spray nozzle with respect to a to-be-sprayed body (or sprayed area) simply and easily.

  Another object of the present invention is to make sure that the slit-like discharge holes of the spray nozzle are opposed to the spray target body (or spray target area) in parallel with a simple operation even when a plurality of spray nozzles are arranged in parallel. An object of the present invention is to provide a spray nozzle device that can be disposed and a connection structure of the spray nozzle device.

  Still another object of the present invention is to provide a spray nozzle device and a spray nozzle device connection structure that can be easily replaced or repaired even when a plurality of spray nozzles are provided, and that the replacement or repair time can be greatly reduced. Is to provide.

As a result of intensive studies to achieve the above-mentioned problems, the present inventor is connected or fixed to the spray nozzle device mounting portion at a predetermined angle with respect to the steel material of the secondary cooling zone or the hot-rolled steel material of the continuous casting device. In the apparatus provided with the first connection portion between the gas-liquid mixing unit and the hollow connection tube, and the second connection portion between the connection tube and the spray nozzle having the slit-like discharge hole, one member of each connection portion A key groove extending in the axial direction is formed on the inner wall of the inner wall at a position (opposite position) shifted by 180 ° in the circumferential direction, and mounted in the key groove at a plurality of positions shifted by a predetermined angle in the circumferential direction of the inner wall of the other member. If the key mechanism is configured by forming a possible ridge, even if a plurality of spray nozzles are arranged in parallel, the direction of the circumferential spray nozzle can be reliably positioned with respect to the gas-liquid mixing unit with a simple operation. Spray nozzle (or spray area) It found that it provided in parallel slit-like discharge hole, thereby completing the present invention.

That is, the spray nozzle device of the present invention is mixed in the mixing unit (or gas-liquid mixing unit) for mixing the liquid and the gas via the connecting pipe (or gas-liquid supply pipe) and the mixing unit. A spray nozzle device in which a spray nozzle for spraying a gas-liquid mixed fluid is connected to a first connection part between the mixing unit and the connection pipe, and a second connection part between the connection pipe and the nozzle tip. Each of the positioning key mechanisms and a fastening member for fastening the first and second connecting portions are provided. The mixing unit is usually fixed and arranged at a predetermined angle (or posture) with respect to an object to be sprayed (or spray area) such as a cooling surface of a slab (or a transport surface of the slab). That is, the mixing unit is connected to or fixed to a mounting portion of the spray nozzle device at a predetermined angle with respect to the steel material in the secondary cooling zone or the hot-rolled steel material of the continuous casting apparatus. The first connecting portion between the mixing unit and the connecting pipe includes two positioning key mechanisms formed extending in the axial direction at a position (opposite position) shifted by 180 ° in the circumferential direction, and the connecting pipe and The second connecting portion with the spray nozzle is formed to be shifted in the circumferential direction by a predetermined angle with respect to the key mechanism of the first connecting portion and to extend in the axial direction at a plurality of positions at equal intervals in the circumferential direction. A plurality of key mechanisms are provided, and no O-ring is attached to the first and second connecting portions. Furthermore, the mixing unit does not include a collision column protruding into the flow path, the connecting pipe does not include a pin that crosses the flow path, and the mixing unit and the connecting pipe each have a hollow cylindrical flow path. ing. In such a device, the position (angle) of the spray nozzle in the circumferential direction with respect to the mixing unit can be simply and reliably positioned using the key mechanisms of the first and second connecting portions, and the positioning is fixed by the fastening member. I can .

  In the spray nozzle device, the key mechanism includes a key groove extending in the axial direction of the inner wall of one member constituting the connecting portion, and a ridge formed on the inner wall of the other member and attachable to the key groove. It may be configured. When such a key mechanism is used, positioning can be performed easily and reliably by inserting or mounting the protrusions of the other member with respect to the key groove of one member of the connecting portion.

  The fastening member may be constituted by a cap nut that can be engaged with one member and can be screwed into a spiral groove formed in the other member. If such a cap nut is utilized, it can be screwed together with the other member of a connection part in the state engaged with one member of the connection part, and both members of a connection part can be connected tightly and firmly.

  Further, a plurality of positioning key mechanisms may be formed in at least one of the first and second connecting portions with an angular shift of 90 ° in the circumferential direction. Using such a plurality of key mechanisms, even if the direction of the spray nozzle is incorrectly connected to the connection pipe (or mixing unit), the connection is released and the direction of the spray nozzle is changed by 90 ° to the connection pipe. With a simple operation of mounting or connecting, the spray nozzle can be adjusted to an appropriate orientation with respect to the connecting pipe (or mixing unit).

More specifically, the spray nozzle device of the present invention includes, for example, a mixing unit for mixing water and air, a connecting pipe having a flow path for fluid mixed in the mixing unit, And a spray nozzle having a slit-like discharge hole. The first connecting portion between the mixing unit and the connecting pipe is at a position (opposite position) that is shifted by 180 ° in the circumferential direction. with two positioning key mechanism formed to extend in the axial direction, the angle 90 second connecting portion between the connecting tube and the spray nozzle, the circumferential direction key mechanism of the first connecting portion as a reference A plurality of key mechanisms may be provided that extend in the axial direction at a plurality of positions that are offset from each other.

The present invention, through a connecting pipe, a mixing unit for mixing a liquid and a gas, a mixed gas-liquid mixed fluid connecting the spray nozzle for spraying in this mixing unit, the spray nozzle apparatus It is a method of connection , wherein the mixing unit and the connecting pipe are connected or fixed to a mounting part of the spray nozzle device at a predetermined angle with respect to a steel material of a secondary cooling zone or a hot-rolled steel material of a continuous casting device . first connecting portion, and the connecting pipe and without each of the second connecting portion of the nozzle tip is mounted an O-ring, by the first connecting portion and the positioning key mechanism formed on the second connecting portion Connection of the spray nozzle device that positions the circumferential position, covers the outer peripheral portions of the first connecting portion and the second connecting portion, and fastens and connects the first and second connecting portions with a fastening member, respectively. A method is also encompassed. In this method, the mixing unit and the connecting pipe are connected by the first connecting portion by two positioning key mechanisms formed extending in the axial direction at a position (opposite position) shifted by 180 ° in the circumferential direction. The connecting pipe is formed by a plurality of key mechanisms formed to extend in the axial direction at a plurality of positions that are circumferentially deviated from each other by a predetermined angle in the circumferential direction with respect to the key mechanism of the first connecting portion. And the spray nozzle are connected by the second connecting portion.

  In the present invention, the direction of the spray nozzle with respect to the spray target (or spray target area) can be easily and easily adjusted using the key mechanism. Further, even when a plurality of spray nozzles are arranged in parallel, the slit-like discharge holes of the spray nozzles can be reliably arranged in parallel to each other with a simple operation with respect to the spray target body (or spray target area). Furthermore, since the key mechanism can be used for connection, even if a plurality of spray nozzles are provided, replacement or repair is easy, and replacement or repair time can be greatly shortened.

FIG. 1 is a schematic view for explaining the arrangement state of the spray nozzle device of the present invention. FIG. 2 is a schematic side view showing the spray nozzle device of FIG. FIG. 3 is a schematic front view showing the spray nozzle of FIG. FIG. 4 is a schematic exploded perspective view for explaining the form of the first connecting portion. FIG. 5 is a schematic cross-sectional view showing the form of the first connecting portion. FIG. 6 is a schematic exploded perspective view for explaining the form of the second connecting portion. FIG. 7 is a schematic cross-sectional view showing the form of the second connecting portion.

  Hereinafter, the present invention will be described in detail with reference to the accompanying drawings. FIG. 1 is a schematic view for explaining an arrangement state of the spray nozzle device of the present invention, FIG. 2 is a schematic side view showing the spray nozzle device of FIG. 1, and FIG. 3 shows the spray nozzle of FIG. It is a schematic front view.

  The spray nozzle device includes a socket part (water port part) 3a for connecting to a water supply pipe 1 having a flow rate and / or pressure adjusting mechanism, and a socket for connecting to an air supply pipe 2 having a pressure adjusting mechanism. A mixing unit (or a gas-liquid mixing adapter) 5 including a gas-liquid mixing chamber 4 for forming a gas-liquid mixed fluid by colliding and mixing water and air. A connecting pipe (or gas-liquid supply pipe) 11 having a flow path for supplying the fluid mixed in the mixing unit to the spray nozzle 31, and attached to the tip of the connecting pipe and supplied from the connecting pipe 11 And a spray nozzle 31 for spraying the gas-liquid mixed fluid that has been sprayed from the slit-shaped or elongated elliptical discharge hole 33.

  As shown in FIG. 3, the spray nozzle 31 of this example includes a cylindrical nozzle body 32, a slit-like discharge port 33 formed at the tip of the nozzle body avoiding the shaft core, and these discharge ports. And a flow path 24 that communicates with the flow path of the connecting pipe 11. The form of the flow path 24 of the nozzle body 32 is not particularly limited, and Japanese Patent Application Laid-Open No. 2008-168167 can be referred to for the structure of the spray nozzle. For example, the shape of the flow path 24 of the nozzle main body 32 is orthogonal to the axial direction of the nozzle main body 32 on the upstream side of the slit-shaped discharge port 33 and orthogonal to the extending direction of the slit-shaped discharge port 33. A cylindrical first channel formed in the direction, and a cylindrical second channel formed in the axial direction of the nozzle body 1 on the upstream side of the first channel and having a narrow channel width. A cylindrical shape that is formed in the axial direction of the nozzle body 32 coaxially with the second flow path and upstream of the second flow path, and has a larger flow path width than the second flow path You may comprise a 3rd flow path etc. In addition, a notch groove extending in the axial direction may be formed in the flow path wall, and a collision wall (or stepped portion) capable of colliding with fluid from upstream may be formed.

  In this example, the mixing unit 5 is in the form of a square columnar block. As shown in FIG. 1, the sockets 3 a and 3 b of the plurality of mixing units 5 are connected to the water supply pipe 1 and the air. Branch pipes branched from the supply pipe 2 are connected to each other.

  In such a spray nozzle device in which a plurality of spray nozzles 31 are arranged in parallel, the angle (direction) of each spray nozzle 31 with respect to the spray region may change, and the spray region may not be sprayed with a uniform amount of spray liquid.

  Therefore, in this example, as shown in FIG. 4 (a schematic exploded perspective view for explaining the form of the first connecting part) and FIG. 5 (a schematic sectional view showing the form of the first connecting part), the mixing The first connecting portion C1 that connects the unit 5 and the connecting pipe (gas-liquid supply pipe) 11 is two positioning members that are formed to extend in the axial direction at a position (opposite position) shifted by 180 ° in the circumferential direction. A key mechanism is provided. More specifically, the mixing unit 5 includes a cylindrical first adapter 6 that communicates with the gas-liquid mixing chamber 4, and a protrusion ( A key portion 7 is formed so as to extend in the axial direction, and a mounting step portion (a recessed portion or a receiving portion in which an end portion of the inner peripheral wall is cut out) is provided on the inner peripheral portion of the end face of the first adapter 6. And a spiral groove 9 is formed on the peripheral surface of the first adapter 6.

  On the other hand, a cylindrical second adapter 12 that communicates with the flow path of the connecting pipe 11 is also formed at one end of the connecting pipe (gas-liquid supply pipe) 11. A notch (key groove portion) 13 formed in an opposing portion corresponding to the protrusion (key portion) 7 of the first adapter 6, and an inner peripheral portion of the first adapter 6. A ring-shaped protruding portion 14 that can be mounted on the mounting step (receiving portion) 8 and a ring-shaped convex portion (locked portion) 15 formed on the outer peripheral surface are provided.

  Further, the cap nut 16 for fastening the first connecting portion C1 is formed with an engaging portion 17 with the ring-shaped convex portion (locked portion) 15 of the second adapter 12. That is, on the inner peripheral surface of the cap nut 16 on the second adapter 12 side, there is an engagement step portion 17 that can be engaged with the ring-shaped convex portion (locked portion) 15 on the outer peripheral surface of the second adapter 12. On the inner peripheral surface of the cap nut 16 formed on the first adapter 6 side, a screwing portion 18 that can be screwed into the spiral groove 9 of the first adapter 6 is formed. In this example, a spiral groove is formed from the engagement step portion 17 on the inner peripheral surface of the cap nut 16 toward the first adapter 6 to form a screwing portion 18.

  When the first key mechanism or the key structure (7, 13) is formed by the projection (key part) 7 of the first adapter 6 and the notch (key groove part) 12 of the second adapter 12, The connecting pipe 11 can be reliably and accurately positioned at a predetermined circumferential position with respect to the mixing unit 5. Moreover, the cap nut 16 is screwed into the spiral groove of the first adapter 6 while the cap nut 16 is engaged with the connecting pipe 11 in a state where the cap nut 16 is positioned using the first key mechanism or the key structure (7, 13). By combining, the mixing unit 5 and the connecting pipe 11 can be tightly and firmly fastened via the first adapter 6 and the second adapter 12.

  As shown in FIG. 6 (schematic exploded perspective view for explaining the form of the second connecting part) and FIG. 7 (schematic sectional view showing the form of the second connecting part), the other end of the connecting pipe 11 The part can be connected to the spray nozzle 31 via the adapter 22. That is, a third adapter 22 is formed at the other end of the connecting pipe 11, and the third adapter 22 includes a ring-shaped mounting portion (ring-shaped protruding portion) 24 protruding from the opening, Groove portions (key groove portions) 23 formed on the outer peripheral portion of the mounting portion and extending in the axial direction at a plurality of positions shifted by 90 ° in the circumferential direction, and ring-shaped convex portions (locked portions) formed on the outer peripheral surface 25). In this example, the four groove portions (key groove portions) 23 formed on the outer peripheral portion of the mounting portion 24 are the projections (key portions) 7 of the first adapter 6 or the notches ( It is formed at a position at an angle of 45 ° in the circumferential direction with respect to the key groove portion 13.

  A cylindrical receiving portion 35 to which the ring-shaped mounting portion (ring-shaped protruding portion) 24 of the third adapter 22 can be mounted is formed on the inner peripheral wall of the mounting portion 34 of the spray nozzle 31. The screw portion 36 is formed, and on the inner wall of the receiving portion 35, there are four ridges (key portions) extending in the axial direction corresponding to the four groove portions (key groove portions) 23 of the third adapter 22. ) 37 is formed. The ring-shaped mounting portion (ring-shaped protruding portion) 24 of the third adapter 22 can be abutted with the rear wall (step wall) of the receiving portion 35 of the spray nozzle 31.

  The second connecting portion C <b> 2 between the third adapter 22 and the mounting portion 34 of the spray nozzle 31 can be tightly fastened by the cap nut 38. In other words, the inner peripheral surface of the cap nut 38 for fastening the second connecting portion C2 can be engaged with a ring-shaped convex portion (locked portion) 25 formed on the outer peripheral surface of the third adapter 22. An engaging portion (or engaging step portion) 39 and a screwing portion 40 that can be screwed into the screw portion 36 of the mounting portion 34 of the spray nozzle 31 are formed.

  When the groove portion (key groove portion) 23 of the third adapter 22 and the protrusion (key portion) 37 of the mounting portion 34 of the spray nozzle 31 form a second key mechanism or key structure (23, 37), The spray nozzle 31 can be reliably and accurately positioned at a predetermined position in the circumferential direction with respect to the mixing unit 5 via the connecting pipe 11. Moreover, the cap nut 38 is engaged with the adapter of the connecting pipe 11 while the cap nut 38 is engaged with the adapter of the connecting pipe 11 in a state where the second key mechanism or the key structure (23, 37) is used for positioning. By screwing into the screw portion 36, the connecting pipe 11 and the spray nozzle 31 can be tightly and firmly fastened via the third adapter 22.

  In particular, since the mixing unit 5 is usually attached or fixed at an appropriate angle (for example, a horizontal angle), the connecting pipe 11 is connected to the mixing unit 5 using the first key mechanism (7, 13). Since the spray nozzle 31 can be positioned in the circumferential direction by using the second key mechanism (23, 37), the rotation direction of the spray nozzle 31 can be easily adjusted with respect to the spray area or spray body. In addition, the connecting pipe 11 and the spray nozzle 31 can be easily replaced, and the replacement or repair time can be greatly shortened. Furthermore, with the key mechanism (7, 13) of the first adapter 6 as a reference, there are four key mechanisms (23, 37) at positions at an angle of 45 ° in the circumferential direction (four positions shifted from each other by an angle of 90 ° in the circumferential direction). Therefore, even if the mixing unit 5 is erroneously rotated by 90 ° and fixed, the positioning key mechanism (23, 37) formed at a position shifted by 90 ° in the circumferential direction is used. The spray nozzle can be easily adjusted to a position rotated by 90 °. Therefore, the width direction of the spray pattern by the spray nozzle 31 is made to coincide with the width direction of the slab, and both ends of the spray patterns (spray areas) of the plurality of spray nozzles 31 are overlapped, so that the slab has a uniform spray flow rate. Can be cooled.

  In addition, the spray nozzle apparatus should just be equipped with the mixing unit (or gas-liquid mixing adapter), the connection pipe (connection pipe or gas-liquid supply pipe), and the spray nozzle, and the structure of a mixing unit, a connection pipe, and a spray nozzle is There is no particular limitation. For example, the mixing unit only needs to be able to mix liquid (particularly water) and gas (particularly air). It may be a mixing chamber or a plurality of mixing chambers for sequentially mixing gas and liquid. The flow path may be a flow path that guides liquid (particularly water) and gas (particularly air) to the mixing chamber, and the liquid flow path and the gas flow path are inclined with respect to the mixing chamber. The liquid channel and the gas channel may face each other or face each other in order to increase the gas-liquid collision efficiency. Further, the shape of the mixing unit is not limited to a block shape such as a rectangular parallelepiped, for example, and various forms can be adopted, and the mixing unit is arranged in parallel (or substantially parallel) to the spray area (or the object to be sprayed). May use a mixing unit having a flat surface, and this flat surface may be used as an index of an angle with respect to the spray area (or an object to be sprayed). The plurality of mixing units are normally appropriately connected or fixed to a predetermined attachment site (attachment position) of the spray nozzle device, and as described above, an object to be sprayed (or a spray surface such as a cooling surface of a slab) In many cases, they are fixedly arranged in parallel at a predetermined angle (or posture, for example, parallel angle).

  The connecting pipe only needs to be provided with a flow path for supplying the mixed fluid mixed in the mixing unit to the spray nozzle, and can usually be constituted by a tubular body. The spray nozzle may be attached to the connecting pipe (particularly, the tip of the connecting pipe) and sprays the gas-liquid mixed fluid mixed by the mixing unit. The structure of the spray nozzle is a rectangular spray pattern or a circular spray. Spray nozzles that can form various spray patterns such as patterns, elliptical spray patterns, and linear spray patterns can be employed. Further, the discharge hole of the spray nozzle for spraying the gas-liquid mixed fluid may be circular or the like, and in order to expand the spray region in the width direction, an elliptical shape (long and thin elliptical shape) or a slit-like discharge hole (for example, , One or two discharge holes). The spray nozzle usually has an elliptical shape (such as a long and thin elliptical shape) or a slit-like discharge hole, and often forms a rectangular spray pattern or an elliptical spray pattern. The two discharge ports may be parallel to each other, and in order to cause the fluid from each discharge port to collide and mix in the front area of the tip of the nozzle body or the collision mixing area, the direction of the axis of the nozzle body ( It may be suitable for the front area or the collision mixing area.

  The present invention can be applied to a single spray nozzle, but is preferably applied to a plurality of spray nozzles spraying at a uniform spray flow rate in the width direction. In particular, spray nozzles that form a spray pattern (spray area) having a spread in the width direction are juxtaposed in the width direction of the spray target body (or spray area), and the width of the spray pattern (spray area) of adjacent spray nozzles. It is preferable to spray at a uniform flow rate over the entire width direction while overlapping both sides in the direction.

  In the first connecting portion C1 and the second connecting portion C2, one member (or its adapter) and the other member (or its adapter) may be capable of simply butting the end faces of each other. In order to assist the connection operation, a mounting part that can be attached to each other (for example, a notch part or a receiving part formed on the opening end part of the inner peripheral wall of one member and the opening end part of the other member being attachable) It is preferable to have an annular concave portion formed at the opening end portion of the inner peripheral wall of the member and an annular convex portion formed at the opening end portion of the inner peripheral wall of the other member. In the above example, in the first connecting portion C1, the mounting step portion (receiving portion) 8 is formed on the first member (mixing unit or its first adapter), and the second member (one of the connecting pipes) is formed. A ring-shaped protruding portion (mounting convex portion) 14 is formed on the end portion or the second adapter thereof, but the mounting convex portion is formed on the first member, and the mounting concave portion (receiving portion) is formed on the second member. May be formed. In the second connecting portion C2, a ring-shaped mounting portion (convex portion) 24 is formed on the second member (the other end of the connecting tube or the third adapter), and the third member (spray nozzle or Although the cylindrical receiving part (recessed part) 35 is formed in the mounting part), the mounting recessed part (receiving part) may be formed in the second member, and the mounting convex part may be formed in the third member.

  An adapter is not necessarily required for both members (mixing unit or spray nozzle and connecting pipe) forming the first and second connecting portions, and the ends of both adjacent members may be formed in an adapter structure. An adapter may also be attached (or formed) to the spray nozzle. As described above, the structure of the adapter and the fastening member may include a spiral groove (or a threaded portion) and an engaging portion in association with the cap nut. In many cases, it can be tightened in the axial direction and can be fastened by covering the outer periphery of the connecting portion of both members. Further, the fastening member includes a screwing portion that can be engaged with one member constituting the connecting portion and can be screwed into a spiral groove (or a screw portion) formed on the outer peripheral surface of the other member. It is often composed of cap nuts. The engaging portion of the fastening member with respect to the engaged portion of the member may be formed on the inner peripheral wall of the hollow fastening member, or may be formed on the end portion of the fastening member. It may be formed by a notch step), a claw portion, or the like.

  In the above example, the spiral groove 9 is formed in the first member (mixing unit or the first adapter thereof) in the first connecting portion C1, and the second member (connecting tube or the second adapter thereof) is formed in the first member C1. Although the ring-shaped convex portion (locked portion) 15 is formed, the locked portion with the cap nut is formed on the first member, and the spiral groove or the screw portion is formed on the second member. Good. Moreover, in the 2nd connection part C2, the ring-shaped convex part (latched part) 25 is formed in the 2nd member (the other end part or 3rd adapter of a connection pipe), and the 3rd member (spraying) The screw portion 36 is formed on the nozzle or the mounting portion thereof, but the screw portion or the spiral groove may be formed on the second member, and the locked portion with the cap nut may be formed on the third member. .

  In the spray nozzle device and the connection structure thereof according to the present invention, a positioning key mechanism is formed on each of the first connecting portion between the mixing unit and the connecting tube and the second connecting portion between the connecting tube and the nozzle tip. Therefore, the spray nozzle device can be formed by fastening the first and second connecting portions with the fastening members in a state where the circumferential position is positioned by these key mechanisms. That is, by using the positioning key mechanism of the first connecting portion and the second connecting portion, it is easy to assemble the spray nozzle device, and the connecting pipe and the spray nozzle tip can be easily replaced and replaced or repaired. Work efficiency can be improved. Moreover, the attitude | position (direction of a rotation direction) of the spray nozzle with respect to a mixing unit can be adjusted easily and correctly. More specifically, since the attitude (circumferential angular position) of the spray nozzle with respect to the mixing unit is primarily affected by the first key mechanism at the first connecting portion, the first key mechanism is used with respect to the mixing unit. If the posture of the connecting pipe (angular position in the circumferential direction) can be reliably ensured, the posture of the spray nozzle (angular position in the circumferential direction) with respect to the mixing unit can be reliably and accurately adjusted using the second key mechanism. That is, by setting the circumferential angle position of the second key mechanism in association with the first key mechanism, the attitude of the connecting pipe with respect to the mixing unit can be controlled by the first key mechanism, and the second key mechanism can be controlled by the second key mechanism. The attitude of the spray nozzle relative to the connecting pipe (and thus the mixing unit) can be adjusted and controlled reliably.

  The positioning key mechanism may be formed in both the first connecting portion and the second connecting portion, and at least one key mechanism may be formed in each connecting portion. The positioning key mechanism may be formed at irregular intervals in the circumferential direction for universal positioning in at least one of the first and second coupling portions. In order to facilitate positioning in the circumferential direction at the two connecting portions, a plurality of key mechanisms are often formed at equal intervals in the circumferential direction. The intervals in the circumferential direction of the plurality of key mechanisms can be appropriately selected, and are 30 °, 45 °, or multiples of these angles, for example, 30 °, 45 °, 90, from the viewpoint of adjusting the posture of the member. In many cases, the angle is 120 °, 180 °, or the like. Further, it is preferable that the angular position in the circumferential direction of the key mechanism of the second connecting portion is associated with the angular position in the circumferential direction of the key mechanism of the first connecting portion, for example, at least one of the first connecting portions. The key mechanism of the second connecting portion may be formed at the same angular position in the circumferential direction or a position shifted by a predetermined angle (for example, 40 ° or 90 °) in the circumferential direction with reference to two key mechanisms.

  In a preferred embodiment, the first connecting portion has a plurality of angular positions (for example, two to four angular positions such as positions shifted by 90 °, 120 °, or 180 °), in particular, shifted by 180 ° in the circumferential direction. Two positioning key mechanisms formed to extend in the axial direction at the position (opposing position) are formed, and the second connecting portion is associated with the angular position of the first key mechanism of the first connecting portion, A plurality of key mechanisms (for example, 4 or 8) formed to extend in the axial direction at a position shifted by a predetermined angle (for example, 45 °, 90 °, particularly 90 ° from the angular position of the first key mechanism) Key mechanism, particularly four key mechanisms). The key mechanism having such a form is useful for adjusting the posture (angular position) of the spray nozzle provided with the slit-like discharge hole. That is, by forming a key mechanism in association with the long axis of the slit-like discharge hole in the first connecting portion, the connecting pipe can be connected to the mixing unit at an accurate angle. On the other hand, the spray nozzle may be connected to the connecting pipe at an accurate angle (or posture), or may be erroneously connected at a different angle (or posture). Even if it is connected at such an incorrect angle, if the second key mechanism of the second connecting portion is used, a plurality of key mechanisms are formed at predetermined angular positions in the circumferential direction. The spray nozzle can be adjusted to an appropriate angle or posture by releasing the mechanism, rotating the spray nozzle by a predetermined angle, and connecting using the second key mechanism. Therefore, in an apparatus for spraying gas-liquid mixed mist by arranging a plurality of spray nozzles in parallel, both ends (or both sides) having a small spray flow rate are overlapped in the spray pattern (or spray region) of adjacent spray nozzles. A body to be sprayed (spray area) can be sprayed at a uniform spray flow rate.

  In particular, since the mixing unit is usually already fixed in an appropriate positional relationship (for example, a predetermined angle posture such as a positional relationship of 180 ° at which the first key mechanism is opposed in the vertical direction or the horizontal direction) The connecting pipe can be connected to the mixing unit at an appropriate angle (for example, the 180 ° angular position). Further, the second key mechanism of the second connecting portion (connecting tube and spray nozzle) is associated with the predetermined angular position in association with the angular position of the first key mechanism of the first connecting portion (mixing unit and connecting tube). (For example, an angle position shifted by 90 ° with respect to the 180 ° angle position of the first key mechanism) Even if the spray nozzle is connected at an incorrect angle, the second key mechanism is The spray nozzle can be adjusted to an appropriate angle or posture by releasing and rotating the spray nozzle by a predetermined angle (for example, an angle of 90 °) and connecting using the second key mechanism.

  The key mechanism can be composed of a keyway and a key, and the key may be separated from or integrated with the members constituting the connecting portion. For example, a key groove of one member constituting the connecting part may be formed, and both members may be connected to the key groove by attaching a key separated from the key groove when connecting both members. Alternatively, a key groove may be formed at the same angular position in the circumferential direction of both members, and both members may be connected to the key groove by attaching both members and a released key. In a preferred aspect, a key groove extending in the axial direction of the inner wall of one member constituting the connecting portion, and a ridge (or convex portion) formed on the inner wall of the other member and attachable to or inserted into the key groove. Can be configured. In the above example, in the first connecting part C1, a protrusion (key part) is formed on the first member (mixing unit or its first adapter), and the second member (one end of the connecting pipe). Alternatively, the notch (key groove portion) is formed in the second adapter), but the key groove may be formed in the first member and the key portion may be formed in the second member. Further, in the second connecting portion, a groove portion (key groove portion) is formed in the second member (the other end portion of the connecting tube or its third adapter), and the third member (spray nozzle or mounting portion thereof). Although the ridge (key part) is formed on the second member, the key part of the second member may be formed, and the key groove may be formed on the third member.

  Note that the length and depth of the keyway (the length and thickness of the ridges or protrusions) should be such that the other member can be prevented from rotating in the circumferential direction with respect to one member. What is necessary is just to be sufficient and as shown in the said figure, it does not necessarily need to be an elongate form. Further, as described above, a key groove may be formed on one member and a key portion of the other member may be formed. If necessary, both the one member and the other member may each have a key. A groove and a key portion may be formed. The cross-sectional shape of the keyway may be V-shaped, U-shaped, or U-shaped.

  In the present invention, depending on the application, various liquids and various gases may be mixed and the mixed mist may be sprayed from the spray nozzle, but usually water is used as the liquid and air is often used as the gas. . The gas pressure is generally about 0.01 to 1 MPa (for example, 0.02 to 0.8 MPa), preferably about 0.03 to 0.7 MPa. The liquid is usually supplied as a pressurized liquid (or high-pressure liquid), and the pressure may be about 0.01 to 2 MPa, preferably 0.02 to 1.5 MPa, more preferably about 0.03 to 1 MPa. . The flow rate ratio (volume ratio) between gas and liquid is, for example, gas / liquid (gas / liquid volume ratio) = 3 to 500, preferably 5 to 400, and more preferably 7 to 300 (for example, 10 to 250). There may be. The gas-liquid mixed mist may be sprayed or sprayed downward from the spray nozzle, or may be sprayed or sprayed obliquely or upward depending on the position of the spray target.

  Hereinafter, the present invention will be described in more detail based on examples, but the present invention is not limited to these examples.

Two spray nozzle devices provided with a single slit-like (or elongated ellipse-shaped) discharge port shown in FIGS. 2 and 3 were prepared. As shown in FIG. 1, the two spray nozzle devices were arranged under the condition of a nozzle pitch of 200 mm with the long axis directions of the discharge ports being matched. In the first connecting portion in FIG. 2, two key mechanisms are formed at an angle of 180 ° at the left and right (horizontal) facing portions, and the key mechanism of the first connecting portion is provided in the second connecting portion. Four key mechanisms are formed at a position 45 degrees away from the circumference in the circumferential direction (position in the diagonal direction), and at these angular positions, the outlets of the two spray nozzles are aligned in the major axis direction and parallel to the spray area. Suitable for Then, after arranging the nozzle devices in the above-described form, fluid is supplied to each nozzle device under conditions of a water amount of 20 L / min (pressure 0.54 MPa) and an air amount of 10 m ³ / hr (pressure 0.27 MPa), When sprayed from the discharge port, a spray pattern in which the water density density distribution in the spray width direction (major axis direction of the discharge port) was uniform was obtained at an injection distance of 150 mm.

  On the other hand, the second connecting portion is disassembled with respect to one nozzle device having the above arrangement form, and the spray nozzle device is reconstructed by intentionally rotating the key mechanism of the second connecting portion by an angle of 90 ° from the appropriate angular position. When sprayed in the same manner as described above, a spray pattern spreading in the width direction (major axis direction of the discharge port) and a spray pattern spreading in the thickness direction (minor axis direction of the discharge port) were formed. Therefore, the second connecting portion was disassembled, the spray nozzle was further rotated by 90 °, positioned by the key mechanism, and the spray nozzle device was reconstructed and sprayed in the same manner as described above. A uniform spray pattern was obtained.

  In addition, in the spray nozzle device in which the posture is controlled at an appropriate angle position, the direction (long axis direction) of the discharge port of each spray nozzle matches, and the width direction of the spray (long axis direction of the discharge port) When the water density distribution was measured, the reproducibility of the uniform distribution was obtained, and it was confirmed that replacement and maintenance inspection were easy.

  The spray nozzle device of the present invention can be used for various purposes, for example, cooling of an object to be sprayed or a body to be cooled (a heating body such as a steel material in a secondary cooling zone of a continuous casting apparatus or a steel material for hot rolling), an object to be treated. It can be used for cleaning. In particular, it is disposed between rolls arranged side by side in the secondary cooling zone of the continuous casting apparatus, and is suitable for uniformly cooling by injecting gas-liquid mixed mist (cooling mist) over the entire surface of the slab.

1 ... Water supply pipe 1
2 ... Air supply pipe 2
5 ... Mixing unit 5
6 ... 1st adapter 7 ... Projection part (key part)
8 ... Installation step 9 ... Spiral groove 11 ... Connecting pipe (gas-liquid supply pipe)
12 ... Second adapter 13 ... Notch (key groove)
14 ... Ring-shaped protrusion 15 ... Ring-shaped projection (locking portion)
16 ... Cap nut 17 ... Engagement step part 18 ... Screwing part 22 ... Third adapter 23 ... Groove part (key groove part)
24 ... Ring-shaped mounting part (ring-shaped protrusion)
25 ... Ring-shaped convex part (locked part)
DESCRIPTION OF SYMBOLS 31 ... Spray nozzle 32 ... Nozzle main body 33 ... Slit-shaped discharge port 34 ... Mounting part 35 ... Cylindrical receiving part 36 ... Screw part 37 ... Projection (key part)
38 ... Cap nut 39 ... Engagement part (or engagement step part)
40 ... screwing portion C1 ... first connecting portion C2 ... second connecting portion

Claims (6)

A spray nozzle device in which a mixing unit for mixing liquid and gas and a spray nozzle for spraying a gas-liquid mixed fluid mixed by the mixing unit are connected via a connecting pipe, Positioning key mechanisms respectively formed on the first connecting portion between the unit and the connecting tube, and the second connecting portion between the connecting tube and the nozzle chip, and the outer peripheral portions of the first connecting portion and the second connecting portion And a fastening member for fastening the first and second connecting portions, respectively,
For the steel material of the secondary cooling zone of the continuous casting device or the steel material of the hot rolling, the mixing unit is connected or fixed to the attachment part of the spray nozzle device at a predetermined angle,
The first connecting portion between the mixing unit and the connecting pipe includes two positioning key mechanisms formed extending in the axial direction at a position (opposite position) shifted by 180 ° in the circumferential direction, and the connecting pipe and The second connecting portion with the spray nozzle is formed to extend in the axial direction at a plurality of positions spaced at equal intervals in the circumferential direction with a predetermined angular deviation in the circumferential direction with reference to the key mechanism of the first connecting portion. With multiple key mechanisms
The first and second connecting portions are not equipped with O-rings,
The mixing unit does not include a collision column protruding into the flow path, the connection pipe does not include a pin that crosses the flow path, and the mixing unit and the connection pipe each have a hollow cylindrical flow path. Spray nozzle device.   The key mechanism includes a key groove extending in the axial direction of the inner wall of one member constituting the connecting portion, and a ridge formed on the inner wall of the other member and attachable to the key groove. The spray nozzle device according to 1.   The spray nozzle device according to claim 1 or 2, wherein the fastening member is configured by a cap nut that can be engaged with one member and can be screwed into a spiral groove formed in the other member.   The spray according to any one of claims 1 to 3, wherein at least one of the first and second connecting portions is formed with a plurality of positioning key mechanisms that are offset from each other by an angle of 90 ° in the circumferential direction. Nozzle device. A mixing unit for mixing water and air, a connecting pipe having a flow path for the fluid mixed in the mixing unit, a spray nozzle attached to the tip of the connecting pipe and having a slit-like discharge hole; And the first connecting portion between the mixing unit and the connecting pipe includes two positioning key mechanisms formed to extend in the axial direction at a position (opposite position) shifted by 180 ° in the circumferential direction. the second coupling part of the connecting tube and the spray nozzle, is formed to extend in the axial direction at a plurality of positions where the circumferential angle 90 ° displaced as the first reference a key mechanism of the connecting portion of the plurality The spray nozzle device according to any one of claims 1 to 4, further comprising: a key mechanism. A method of connecting a spray nozzle device by connecting a mixing unit for mixing liquid and gas with a spray nozzle for spraying a gas-liquid mixed fluid mixed in the mixing unit via a connecting pipe. There,
A first connecting portion between the mixing unit and a connecting pipe connected or fixed to a mounting portion of the spray nozzle device at a predetermined angle with respect to the steel material of the secondary cooling zone or the hot-rolled steel material of the continuous casting device ; and Without attaching an O-ring to each of the second connecting portions of the connecting pipe and the nozzle tip, the circumferential position is determined by the positioning key mechanism formed on the first connecting portion and the second connecting portion. ,
Covering the outer peripheries of the first connecting part and the second connecting part, the first connecting part and the second connecting part are fastened and fastened by fastening members, respectively .
The mixing unit and the connecting pipe are connected by a first connecting portion by two positioning key mechanisms formed extending in the axial direction at a position (opposite position) shifted by an angle of 180 ° in the circumferential direction, and the first connecting portion is connected. The connecting pipe and the spray nozzle are formed by a plurality of key mechanisms formed at a plurality of positions that are shifted in the circumferential direction by a predetermined angle in the circumferential direction with respect to the key mechanism of the connecting portion, and extended in the circumferential direction at equal intervals. The connection method of the spray nozzle apparatus which connects by a 2nd connection part .

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