JP6769715B2 - Sprinkler - Google Patents

Description

The present invention relates to a sprinkler.

Conventionally, as disclosed in Patent Document 1, a sprinkler device that overflows water from the upper edge of a trough and sprinkles water on a heat transfer surface is known. As shown in FIG. 10, the sprinkler 71 is composed of a trough 72 and a plate material extending in the longitudinal direction of the trough 72, and is arranged in the trough 72 at intervals in the width direction of the trough 72. It is provided with a water diversion device 74 for diversion of the supplied water. The water diversion device 74 has a top plate 75 attached to the straightening vane 73, a plurality of buffer plates 76 having an opening 76a for passing water and arranged at intervals below the top plate 75, and a buffer plate. 76 has a moguri weir 77 provided at both ends in the longitudinal direction of the trough. The momentum of the water introduced into the trough 72 is weakened in the process of passing through the opening 76a of the buffer plate 76, and the lower end of the weir 77 and the buffer plate below it flow through the space between the buffer plates 76 and 76. Even in the process of flowing through the gap between the 76 and 76, the momentum of the water flow can be weakened.

JP-A-11-323756

In the sprinkler 71 disclosed in Patent Document 1, since the weir 77 is also provided at the end of the buffer plate 76, in the process of passing through the gap between the weir 77 and the buffer plate 76 below the weir 77. , The dynamic pressure of water can be reduced. However, in this configuration, it was newly found that when a large flow rate of water was introduced into the trough 72, the water surface undulated violently. Therefore, the configuration of Patent Document 1 cannot be applied to a large flow rate.

Therefore, the present invention has been made in view of the above-mentioned prior art, and an object of the present invention is to reduce the dynamic pressure of the flow of water introduced into the trough, and in the case of a large flow rate. However, the purpose is to be able to suppress the waviness of the liquid surface.

In order to achieve the above object, the present invention is a water sprinkler used in an open rack type vaporizer having a large number of heat transfer tubes arranged in one direction, and has a shape extending along the arrangement direction of the large number of heat transfer tubes. A supply port into which water as a heat source fluid is introduced is formed at the bottom, and a trough that overflows the supplied water from the upper edge and water introduced into the trough through the supply port are passed through. While the opening is formed, a buffer plate that changes the water that has passed through the supply port into a flow in the longitudinal direction of the trough, and a buffer plate that is arranged above the buffer plate and below the liquid level and passes through the opening A top plate that changes the water flow in the longitudinal direction of the trough, and a porous member having a large number of holes for passing water flowing in the longitudinal direction of the trough in the space along the buffer plate are provided. The perforated member is a sprinkler device connected to the buffer plate .

In the present invention, since the water flowing along the buffer plate passes through a large number of holes of the porous member, a gap is formed between the buffer plate and the member below the buffer plate like a conventional moguri weir. It is possible to reduce the flow resistance of water flowing in the longitudinal direction of the trough under the buffer plate. That is, if a large number of holes are not formed in the moguri weir itself as in the conventional moguri weir, water will stay at the base of the moguri weir, and it is inevitable that the flow resistance will increase. Therefore, it becomes difficult for water to flow to the lower side of the buffer plate, and when a large flow rate of water is supplied, the flow rate to flow to the upper side of the buffer plate increases. Therefore, the conventional configuration having a moguri weir is not excellent in dispersibility in the case of a large flow rate. On the other hand, when the porous member having a large number of holes is provided, the water passes through the large number of holes, so that the water does not stay under the buffer plate. Therefore, the flow resistance can be reduced while the structure can reduce the dynamic pressure. Therefore, the flow rate of water flowing through the opening of the buffer plate toward the top plate can be reduced as compared with the conventional configuration, while the flow rate of water flowing under the buffer plate in the longitudinal direction of the trough can be increased. .. Therefore, the dispersibility of water can be improved. Moreover, in the case of the conventional moguri weir, water flows toward the gap under the moguri weir, so when a large flow rate of water is supplied into the trough, the water surface rampages due to the flow passing through the gap. (Or violent rippling) occurs, whereas in the present invention, since the porous member has a structure having a large number of holes, the water surface is less likely to run wild (or violent rippling). Therefore, it is possible to sprinkle water at a large flow rate, which is suitable for a large flow rate. Moreover, the flow rate flowing through the gap between the top plate and the buffer plate below it is unlikely to increase even in the case of a large flow rate, as compared with the conventional configuration having a moguri weir. Therefore, the rippling of the water surface is suppressed. Therefore, the straightening vane can be omitted, and in that case, the number of parts can be reduced. Further, in the present invention, the porous member has a structure having a large number of holes, and when water passes through the porous member, a large number of vortices can be generated to dissipate energy. Therefore, water that has passed through the porous member. Dynamic pressure can be reduced. Therefore, the flow of water can be stabilized.

Before SL porous member is connected to the buffer plate. That is, the porous member may be integrally formed with the cushioning plate, or may be fixed to the cushioning plate. In this case, a member for fixing the porous member becomes unnecessary, and an increase in the number of parts can be suppressed.

The present invention is a water sprinkler used in an open rack type vaporizer having a large number of heat transfer tubes arranged in one direction, has a shape extending along the arrangement direction of the large number of heat transfer tubes, and serves as a heat source fluid. While a supply port for introducing water is formed at the bottom, a trough for overflowing the supplied water from the upper edge and an opening for passing the water introduced into the trough through the supply port are formed. A buffer plate that changes the water that has passed through the supply port into a flow in the longitudinal direction of the trough, and water that is arranged above the buffer plate and below the liquid level and has passed through the opening in the longitudinal direction of the trough. The top plate is provided with a top plate for changing the flow of water, and a porous member having a large number of holes for passing water flowing in the longitudinal direction of the trough along the buffer plate, and the porous member is removable from the cushion plate. a sprinkler system that is attached to. In the present invention , since the porous member can be removed during maintenance of the porous member, the burden of maintenance work on the porous member can be reduced. For example, when seawater is used, the pores of the porous member may be clogged, which is particularly effective when seawater is used. Further, since it is possible to change to a porous member having a different aperture ratio, it is also possible to attach a porous member having an appropriate aperture ratio according to the amount of water to be supplied and the like.

The buffer plate may be provided with a perforated plate having a large number of holes communicating with the opening. In this embodiment, the flow resistance at the opening of the buffer plate can be increased, so that the flow rate of water flowing in the longitudinal direction of the trough under the buffer plate can be further increased. Therefore, the dispersibility of water can be further enhanced.

The perforated plate may be attached to and detached from the cushioning plate. In this aspect, since the perforated plate can be removed during maintenance of the perforated plate, the burden of maintenance work on the perforated plate can be reduced. For example, when seawater is used, the pores of the perforated plate may be clogged, so that it is more effective when seawater is used. It is also possible to change to a perforated plate having a more appropriate opening ratio.

The present invention is a water sprinkler used in an open rack type vaporizer having a large number of heat transfer tubes arranged in one direction, has a shape extending along the arrangement direction of the large number of heat transfer tubes, and serves as a heat source fluid. While a supply port for introducing water is formed at the bottom, a trough for overflowing the supplied water from the upper edge and an opening for passing the water introduced into the trough through the supply port are formed. A buffer plate that changes the water that has passed through the supply port into a flow in the longitudinal direction of the trough, and water that is arranged above the buffer plate and below the liquid level and has passed through the opening in the longitudinal direction of the trough. A top plate that changes the flow of water, a perforated member having a large number of holes for passing water flowing in the longitudinal direction of the trough along the cushion plate, and fixed to the bottom of the trough while being arranged below the cushion plate. is, the buffer and the front buffer member suppressing the flow of water towards the plate, a support member for supporting the top plate and the buffer plate to the front cushioning member, a sprinkler system that have a.

In this aspect, since the front-stage cushioning member is fixed to the bottom of the trough, the front-stage cushioning member can be stabilized even if the front-stage cushioning member receives the energy of water introduced into the trough. Moreover, since the energy of water loaded on the buffer plate can be reduced by the pre-stage cushioning member, the effect of dissipating the energy of water by the porous member can be effectively exerted. Further, since the top plate and the buffer plate are supported by the front-stage buffer member by the support member, the top plate and the buffer plate that receive the dynamic pressure of water can be stably held.

As described above, according to the present invention, the dynamic pressure of the flow of water introduced into the trough can be reduced, and the waviness of the liquid surface can be suppressed even at a large flow rate.

It is a figure which shows roughly the structure of the vaporization device to which the sprinkler device which concerns on embodiment of this invention is applied. It is a figure which shows the sprinkler device when seen in the direction in which heat transfer tubes are lined up. It is a figure which shows the main part of the sprinkler seen in the direction orthogonal to the longitudinal direction of a trough. It is a figure which shows the modification of the perforated member provided in the sprinkler. It is a figure which shows the guide part which guides a perforated member. It is a figure which shows the modification of the cushioning plate provided in the sprinkler. It is a figure which shows roughly the structure of the vaporization apparatus to which the sprinkler apparatus which concerns on other embodiment of this invention is applied. It is a figure which shows the main part of the sprinkler of FIG. 7 seen in the direction orthogonal to the longitudinal direction of a trough. It is a figure which shows the sprinkling apparatus which concerns on other embodiment of this invention. (A) (b) It is a figure which shows the conventional sprinkler.

Hereinafter, embodiments for carrying out the present invention will be described in detail with reference to the drawings.

As shown in FIG. 1, the sprinkler 10 according to the present embodiment is used for the vaporizer 1 that vaporizes a low-temperature liquefied gas such as liquefied natural gas (LNG). The vaporizer 1 is connected to a heat transfer tube panel 3 in which a large number of heat transfer tubes 2 extending in the vertical direction are arranged in one direction, and to lower ends of a large number of heat transfer tubes 2 constituting the heat transfer tube panel 3, respectively. A supply header 4, a collective header 5 connected to the upper ends of a large number of heat transfer tubes 2 constituting the heat transfer tube panel 3, and a water sprinkler 10 for sprinkling water on the heat transfer tube panel 3 are provided. The vaporizer 1 is a so-called open rack type vaporizer 1. That is, the vaporizer 1 heats the LNG flowing in the heat transfer tube 2 with water (heat source fluid) such as seawater flowing down the outside of the heat transfer tube 2 to vaporize the LNG. Although not shown, the vaporizer 1 has a large number of heat transfer tube panels 3, and each heat transfer tube panel 3 is provided with a large number of water sprinklers 10 so as to sprinkle water from both sides.

The sprinkler 10 includes a trough 11 and a water supply unit 12 for supplying water to the trough 11. The water supply unit 12 includes a water supply pipe 12a and a connection pipe 12b branched from the water supply pipe 12a and connected to the bottom of the trough 11. The water supply pipe 12a is provided for each trough 11, and the water supply unit 12 is configured so that water flows from the manifold 13 connected to each water supply pipe 12a to each water supply pipe 12a. Each of the water supply pipes 12a is provided with a regulating valve 12c for adjusting the flow rate of water.

The trough 11 is configured to extend along the direction in which a large number of heat transfer tubes 2 constituting the heat transfer tube panel 3 are arranged, and as shown in FIG. 2, the bottom plate portion 16 and both ends in the width direction of the bottom plate portion 16 It is provided with a pair of side plate portions 17, 17 which are raised from the above, respectively. The bottom plate portion 16 has a rectangular flat plate shape that is long in the direction in which the heat transfer tubes 2 are arranged, and each side plate portion 17 is also formed in a rectangular flat plate shape that is long in the direction in which the heat transfer tubes 2 are arranged.

The upper surface of the trough 11 is open, and water overflows from this opening and is sprinkled toward the heat transfer tube panel 3. At the upper end of each side plate portion 17, an inclined trough edge 19 is formed so that overflowing water flows toward the heat transfer tube 2 side. Although not shown, the troughs 11 arranged outside the heat transfer tube panels 3 arranged at both ends may have trough edges 19 formed only on the side plate portions 17 on the heat transfer tube panel 3 side.

The sprinkler 10 includes a reduction unit 25 for reducing the upward momentum of the water supplied into the trough 11. As shown in FIG. 1, in the present embodiment, the reduction portions 25 are arranged at a plurality of locations in the longitudinal direction of the trough 11. The reduction unit 25 is provided at a position corresponding to the connection portion of the connection pipe 12b of the water supply unit 12, respectively.

A supply port 16a, which is an opening at the end of the connecting pipe 12b, is formed in the bottom plate portion 16 of the trough 11 (see FIG. 3). The reduction unit 25 is arranged so as to be located immediately above the supply port 16a.

As shown in FIGS. 2 and 3, the reduction unit 25 includes a buffer plate 27 for weakening the force of water in the trough 11, a top plate 28 arranged above the buffer plate 27, and a porous member 29. It has a front-stage cushioning member 30 arranged below the cushioning plate 27, and a support member 32 that supports the cushioning plate 27, the top plate 28, and the front-stage cushioning member 30. In the present embodiment, the two cushioning plates 27 and 27 are arranged so as to be arranged vertically, and the perforated members 29 are provided at both ends of each cushioning plate 27.

The front-stage buffer member 30 is a member fixed to the bottom plate portion 16 of the trough 11, and is a flat plate-shaped main body portion 30a having a long shape in the longitudinal direction of the trough 11 and a pair provided at both ends of the main body portion 30a. It has legs 30b and 30b. The main body portion 30a is arranged in parallel with the bottom plate portion 16 so as to form a space between the main body portion 30a and the bottom plate portion 16. The main body 30a is provided with an opening 30c, and the opening 30c is located directly above the supply port 16a.

The leg portion 30b has a wall portion 30d extending downward from the longitudinal end portion of the main body portion 30a, and an extending portion 30e extending from the lower end of the wall portion 30d along the bottom plate portion 16. The leg portion 30b is formed by bending the end portion of the main body portion 30a in the longitudinal direction and is integrally formed with the main body portion 30a. The leg portion 30b also has a structure in which a flat plate-shaped member is bent.

The extending portion 30e is superposed on the upper surface of the bottom plate portion 16 and is fixed to the bottom plate portion 16 by fasteners (not shown). The extension portion 30e may be fixed to the bottom plate portion 16 by welding or the like. The front-stage buffer member 30 receives the momentum of water supplied into the trough 11 from the supply port 16a as it is in the main body portion 30a. Therefore, the legs 30b and 30b are firmly fixed to the bottom plate 16 in order to prevent the main body 30a from rising.

The water introduced into the trough 11 through the supply port 16a is once stored in the space surrounded by the main body portion 30a and the leg portions 30b, 30b of the front stage buffer member 30. A part of this water is led out upward through the opening 30c of the main body 30a. The remaining water is led out to the space between the support member 32 and the side plate portion 17 through the notch portion 32b of the support member 32 described later.

The cushioning plate 27 is formed of a rectangular flat plate-shaped member, and is arranged so as to be parallel to the bottom plate portion 16 at a position above the main body portion 30a of the front-stage cushioning member 30. The lower buffer plate 27 is arranged in parallel with the main body 30a so as to form a space having a predetermined height between the lower buffer plate 27 and the main body 30a of the front cushion member 30. The upper cushion plate 27 is arranged in parallel with the lower cushion plate 27 so as to form a space having a predetermined height between the upper cushion plate 27 and the lower cushion plate 27.

An opening 27a is formed in each of the buffer plates 27. These openings 27a are located directly above the openings 30c formed in the main body 30a of the front buffer member 30. Therefore, a part of the water led out upward through the opening 30c of the front-stage buffer member 30 passes through the opening 27a of the buffer plate 27, and the rest is troughed along the buffer plate 27 under the buffer plate 27. Flows in the longitudinal direction of. That is, the buffer plate 27 changes a part of the water that has passed through the supply port 16a into a flow in the longitudinal direction of the trough 11. In the present embodiment, the cushioning plates 27 are provided in two upper and lower stages, but the present invention is not limited to this. A cushioning plate 27 having only one stage may be provided, or a cushioning plate 27 having three or more stages may be provided.

The top plate 28 is formed of a rectangular flat plate-shaped member, and is arranged so as to be parallel to the bottom plate portion 16 and the cushioning plate 27. The top plate 28 is installed so as to be below the water surface. Therefore, the upward flow of water that has passed through the opening 27a of the buffer plate 27 can be changed to the longitudinal flow of the trough 11 while weakening the momentum of the upward water in the water. The top plate 28 may be the same size as the buffer plate 27, or may be formed slightly shorter than the buffer plate 27 in the longitudinal direction of the trough 11.

The perforated members 29 are located at both ends of the cushioning plate 27 in the longitudinal direction. The perforated member 29 is substantially perpendicular to the cushioning plate 27 and has a long shape in a direction orthogonal to the longitudinal direction of the trough 11. A large number of holes 29a are uniformly formed in the perforated member 29 over almost the entire surface. The holes 29a may all have the same size or may be different. Further, the shape of the hole 29a is not limited to a circle. For example, the holes 29a may be arranged vertically in a horizontally long shape, or may be arranged horizontally in a vertically long shape. Further, the holes 29a may be arranged regularly or randomly. Further, the porous member 29 may have a mesh shape as long as it can provide an appropriate flow resistance. In short, the relative positions and sizes of the holes 29a may be set so that the vortices generated by the water passing through the porous member 29 interfere with each other to reduce the energy. The aperture ratio and distribution of the holes 29a with respect to the area of the porous member 29 are appropriately set according to the flow rate of water.

A gap is formed between the lower end of the porous member 29 connected to the lower cushioning plate 27 and the front-stage cushioning member 30, but this gap may not be formed. That is, the perforated member 29 and the pre-stage buffer member 30 may be in contact with each other. Further, although a gap is formed between the lower end portion of the porous member 29 connected to the upper cushion plate 27 and the lower cushion plate 27, this gap may not be formed. That is, the upper perforated member 29 and the lower cushioning plate 27 may be in contact with each other.

The perforated member 29 is arranged at the end of the buffer plate 27 in the longitudinal direction of the trough 11, but is not limited to this. For example, the perforated member 29 may be arranged at a position shifted inward (the side closer to the opening of the cushioning plate 27) from the end portion of the cushioning plate 27. In this case as well, the perforated member 29 may be attached to the cushioning plate 27 or may be attached to the support member 32.

The support member 32 is a pair of vertical plates 32a, 32a arranged on both sides in the width direction (direction orthogonal to the longitudinal direction of the trough 11) so as to sandwich the front cushion member 30, the cushion plate 27, and the top plate 28, respectively. have. Each vertical plate 32a is formed of a flat plate material, and is fixed to the front-stage cushioning member 30, the cushioning plate 27, and the top plate 28 by welding or the like. That is, the cushioning plate 27 and the top plate 28 are fixed to the front-stage cushioning member 30 via the support member 32. Therefore, the fixed structure of the cushioning plate 27 and the top plate 28 can be made firm. The top plate 28 is provided along the upper end portion of the vertical plate 32a.

The vertical plate 32a is arranged at a position away from the side plate portion 17 so as to form a space between the vertical plate 32a and the side plate portion 17 of the trough 11. The lower end of the vertical plate 32a is in contact with the bottom plate 16 of the trough 11, but a notch 32b is formed at the lower end. Therefore, the space between the vertical plate 32a and the side plate 17 and the space between the vertical plates 32a and 32a communicate with each other through the notch 32b. The notch 32b faces the space between the front cushioning member 30 and the bottom plate 16 of the trough 11.

In the present embodiment, the porous member 29 is integrally formed with the cushioning plate 27. That is, the perforated member 29 is connected to the cushioning plate 27 by bending both ends of one rectangular flat plate member in the longitudinal direction and forming a large number of holes 29a in the bent portion. .. However, the porous member 29 is not limited to this configuration. For example, as shown in FIG. 4, the porous member 29 may be formed of a member different from the cushioning plate 27 and may be attached to the cushioning plate 27. The perforated member 29 may be fixed to the cushioning plate 27 by welding or the like, or may be detachable from the cushioning plate 27.

FIG. 4 shows a configuration in which the perforated member 29 can be attached to and detached from the cushioning plate 27 by means of fasteners 33 such as bolts and nuts. In this case, the porous member 29 has a flat plate-shaped hole forming portion 29b in which a large number of holes 29a are formed and a flat plate-shaped polymerized portion 29c connected to the upper end portion of the hole forming portion 29b and superposed on the buffer plate 27. It has a structure. Then, the polymerization portion 29c is fastened to the cushioning plate 27. With this configuration, it is not necessary to remove the cushioning plate 27 when removing the porous member 29, so that the porous member 29 can be easily removed. Although the hole forming portion 29b is in a vertical posture, it may be inclined.

FIG. 5 shows a guide portion 35 that guides the porous member 29 when the porous member 29 is attached or detached. The guide portion 35 is used to guide the porous member 29 when the porous member 29 is attached to the buffer plate 27. The guide portion 35 is fixed to the vertical plate 32a in a form protruding from the inner surface of each vertical plate 32a (the surface of the trough 11 facing the side opposite to the side plate portion 17). The guide portion 35 has a guide groove 35a through which the hole forming portion 29b of the porous member 29 is inserted. By sliding the hole forming portion 29b in the guide groove 35a, the bolt insertion hole (not shown) formed in the overlapping portion 29c can be aligned with the bolt insertion hole (not shown) formed in the cushioning plate 27. .. Therefore, the work of aligning the bolt insertion holes with each other can be easily performed.

As shown in FIG. 6, a perforated plate 37 may be attached to the cushioning plate 27. The large number of holes 37a of the perforated plate 37 communicate with the opening 27a of the cushioning plate 27. The size of the hole 37a of the perforated plate 37 is smaller than the size of the opening 27a of the buffer plate 27. Since the water that has passed through the opening 27a of the buffer plate 27 passes through the large number of holes 37a of the perforated plate 37, the flow resistance when passing through the opening 27a can be increased as compared with the configuration in which the perforated plate 37 is not provided. The opening 27a of the cushioning plate 27 may have the same shape as the opening 27a shown in FIG. 4, or may be different. The cushioning plate 27 may be divided into two parts so as to be separated from each other (see FIG. 6).

The perforated plate 37 may be detachable from the cushioning plate 27, or may be fixed to the cushioning plate 27 by welding or the like. FIG. 6 shows an example in which the perforated plate 37 is attached to the cushioning plate 27 by fasteners 39 such as bolts and nuts.

In the sprinkler 10 of the present embodiment, the water supplied from the water supply unit 12 vigorously flows into the trough 11 from the supply port 16a formed in the bottom plate portion 16 of the trough 11. A part of the water that has flowed into the trough 11 flows upward through the opening 30c of the front-stage cushioning member 30, and the rest is once in the space surrounded by the main body 30a and the legs 30b, 30b of the front-stage cushioning member 30. It is stored. As a result, the dynamic pressure of the water introduced into the trough 11 is reduced. Further, the momentum of water can be weakened by temporarily storing the water in the space surrounded by the main body portion 30a and the leg portions 30b, 30b of the front-stage buffer member 30. A part of the water in this space flows into the space between the side plate portion 17 and the vertical plate 32a through the notch portion 32b of the support member 32. The water flowing into this space is sprinkled toward the heat transfer tube panel 3 beyond the trough edge 19.

On the other hand, a part of the water flowing upward through the opening 30c of the front-stage cushioning member 30 passes through the opening 27a of the cushioning plate 27 and presses the top plate 28. This water flows in the longitudinal direction of the trough 11 along the lower surface of the top plate 28. The water flowing along the top plate 28 escapes from the reduction portion 25 between the top plate 28 and the buffer plate 27.

Further, a part of the water that has passed through the opening 30c of the front-stage cushioning member 30 has a space between the cushioning plate 27 and the main body 30a of the front-stage cushioning member 30 and a space between the cushioning plates 27 in the longitudinal direction of the trough 11. Flow to. This water passes through the numerous holes 29a of the porous member 29 and the gaps on the lower side of the porous member 29 and escapes from the reduction portion 25.

The water that has escaped from the reduction section 25 in the longitudinal direction of the trough 11 overflows from the trough edge 19 through the space between the adjacent reduction sections 25.

As described above, in the present embodiment, since the water flowing along the cushioning plate 27 passes through a large number of holes 29a, it is between the cushioning plate 27 and the member below it like a conventional moguri weir. It is possible to reduce the flow resistance of water flowing in the longitudinal direction of the trough 11 under the buffer plate 27 as compared with the configuration in which a gap is formed in the trough. That is, if a large number of holes are not formed in the moguri weir itself as in the conventional moguri weir, water will stay at the base of the moguri weir, and it is inevitable that the flow resistance will increase. Therefore, it becomes difficult for water to flow to the lower side of the buffer plate, and when a large flow rate of water is supplied, the flow rate to flow to the upper side of the buffer plate increases. Therefore, the conventional configuration having a moguri weir is not excellent in dispersibility in the case of a large flow rate. On the other hand, when the porous member 29 having a large number of holes 29a is provided, the water passes through the large number of holes 29a, so that the water does not stay under the buffer plate 27. Therefore, the flow resistance can be reduced while the structure can reduce the dynamic pressure. Therefore, the flow rate of water flowing through the opening of the buffer plate 27 toward the top plate 28 is reduced as compared with the conventional configuration, while the flow rate of water flowing under the buffer plate 27 in the longitudinal direction of the trough 11 is reduced. Can be increased. Therefore, the dispersibility of water can be improved. Moreover, in the case of the conventional moguri weir, since it flows toward the gap under the moguri weir, when a large flow rate of water is supplied into the trough 11 from the supply port 16a, it is caused by the flow passing through the gap. While the water surface turbulence (or violent rippling) occurs, in the present embodiment, since the porous member 29 has a large number of holes 29a, the water surface turbulence (or violent rippling) is unlikely to occur. Therefore, it is possible to sprinkle water at a large flow rate, which is suitable for a large flow rate. Moreover, the flow rate flowing through the gap between the top plate 28 and the buffer plate 27 below it is unlikely to increase even in the case of a large flow rate, as compared with the conventional configuration having a moguri weir. Therefore, the rippling of the water surface is suppressed. Therefore, it is not necessary to provide a straightening vane in parallel with the side plate portion 17. Therefore, it also contributes to the reduction of the number of parts. Further, in the present embodiment, the porous member 29 has a structure having a large number of holes 29a, and when water passes through the porous member 29, a large number of vortices are generated and energy can be dissipated. The dynamic pressure of water that has passed through 29 can be reduced. Therefore, the flow of water can be stabilized.

Further, in the present embodiment, the porous member 29 is connected to the cushioning plate 27. Therefore, a member for fixing the porous member 29 becomes unnecessary, and an increase in the number of parts can be suppressed.

Further, the perforated member 29 may be detachably attached to the cushioning plate 27. In this case, since the porous member 29 can be removed during maintenance of the porous member 29, the burden of maintenance work on the porous member 29 can be reduced. For example, when seawater is used, the holes 29a of the porous member 29 may be clogged with foreign matter, which is particularly effective when seawater is used. Further, since it is possible to change to the porous member 29 having a different aperture ratio, it is also possible to attach the porous member 29 having an appropriate aperture ratio according to the amount of water to be supplied.

In the configuration in which the perforated plate 37 having a large number of holes 37a communicating with the opening 27a of the cushioning plate 27 is provided, the flow resistance of the cushioning plate 27 at the opening 27a can be increased. Therefore, the flow rate of water flowing in the longitudinal direction of the trough 11 under the buffer plate 27 can be further increased. Therefore, the dispersibility of water can be further improved.

Further, when the perforated plate 37 is removable from the cushioning plate 27, the perforated plate 37 can be removed during maintenance of the perforated plate 37, so that the burden of maintenance work on the perforated plate 37 can be reduced. For example, when seawater is used, foreign matter may be clogged in the holes 37a of the perforated plate 37, so that it is more effective when seawater is used.

Further, in the present embodiment, since the front-stage cushioning member 30 is fixed to the bottom of the trough 11, the front-stage cushioning member 30 is stabilized even if the front-stage cushioning member 30 receives the energy of water introduced into the trough 11. Can be done. Moreover, since the energy of water loaded on the buffer plate 27 can be reduced by the front-stage buffer member 30, the effect of dissipating the energy of water by the porous member 29 can be effectively exerted. Further, since the top plate 28 and the buffer plate 27 are supported by the front-stage buffer member 30 by the support member 32, the top plate 28 and the buffer plate 27 that receive the dynamic pressure of water can be stably held.

The present invention is not limited to the above embodiment, and various modifications and improvements can be made without departing from the spirit of the present invention. For example, in the above-described embodiment, the configuration is such that the straightening vane is not provided, but the configuration may be such that the straightening vane 23 is provided. For example, as shown in FIG. 7, the straightening vane 23 is supported by a support column (not shown) erected on the bottom plate portion 16 and is arranged in a state where a gap is formed between the straightening plate 23 and the bottom plate portion 16. There is. The straightening vane 23 is arranged along the vertical plate 32a of the support member 23 in a posture parallel to the side plate portion 17 of the trough 11, and is arranged on both sides of the reduction portion 25 in the width direction of the trough 11. .. The straightening vane 23 is arranged up to a position higher than the trough edge 19.

In this case, the water flowing out from the reduction portion 25 in the longitudinal direction of the trough 11 flows into the space between the side plate portion 17 and the straightening vane 23 through the gap under the straightening vane 23, and passes through this space to the trough edge 19 Overflow from.

In this configuration, as shown in FIGS. 7 and 8, the partition plate 21 may be fixed to the straightening vane 23. The partition plate 21 is made of a flat plate member arranged so as to be orthogonal to the straightening vane 23, and both ends in the width direction are fixed to the straightening vane 23, respectively. The lower end of the partition plate 21 is located above the lower end of the straightening vane 23. By providing the partition plate 21, the trough 11 is divided into a first section S1 in which the reduction section 25 is arranged and a second section S2 in which the reduction section 25 is not arranged.

In this configuration, a part of the water that has escaped from the reduction unit 25 flows into the space surrounded by the reduction unit 25, the partition plate 21, and the rectifying plate 23, and a part of the water is formed by the rectifying plate 23 and the side plate portion 17. It overflows from the trough edge 19 through the gap between them. Further, the remaining water passes under the partition plate 21 and flows into the second compartment S2, and overflows from the trough edge 19 through the gap between the straightening vane 23 and the side plate portion 17. It is also possible to omit the partition plate 21.

Further, in the above-described embodiment, the porous member 29 is supported by the cushioning plate 27, but the present invention is not limited to this. The perforated member 29 may be attached to a pair of vertical plates 32a, 32a constituting the support member 32, or as shown in FIG. 9, a straightening vane 23 is also provided in the first compartment S1 and is perforated. The member 29 may be attached to the straightening vane 23. In this case, the perforated member 29 may be fixed to the straightening vane 23 by welding or the like, or may be detachable by a fastener.

10 Water sprinkler 11 Trough 16 Bottom plate 16a Supply port 17 Side plate 19 Trough edge 23 Rectifier plate 25 Reduction part 27 Buffer plate 27a Opening 28 Top plate 29 Perforated member 29a Hole 30 Pre-stage buffer member 32 Support member 37 Perforated plate 37a Hole

Claims (5)

A sprinkler used in an open rack vaporizer with a large number of heat transfer tubes lined up in one direction.
A trough that has a shape that extends along the arrangement direction of the large number of heat transfer tubes, has a supply port for introducing water as a heat source fluid at the bottom, and overflows the supplied water from the upper edge.
An opening is formed through the supply port to allow water introduced into the trough to pass, while a buffer plate that converts the water passing through the supply port into a longitudinal flow of the trough.
A top plate that is placed above the buffer plate and below the liquid level and that changes the water that has passed through the opening into a flow in the longitudinal direction of the trough.
A perforated member having a large number of holes for allowing water flowing in the longitudinal direction of the trough to pass along the buffer plate.
The perforated member is a sprinkler that is connected to the buffer plate. A sprinkler used in an open rack vaporizer with a large number of heat transfer tubes lined up in one direction.
A trough that has a shape that extends along the arrangement direction of the large number of heat transfer tubes, has a supply port for introducing water as a heat source fluid at the bottom, and overflows the supplied water from the upper edge.
An opening is formed through the supply port to allow water introduced into the trough to pass, while a buffer plate that converts the water passing through the supply port into a longitudinal flow of the trough.
A top plate that is placed above the buffer plate and below the liquid level and that changes the water that has passed through the opening into a longitudinal flow of the trough.
A perforated member having a large number of holes for allowing water flowing in the longitudinal direction of the trough to pass along the buffer plate.
The perforated member is a sprinkler that is detachably attached to the shock absorber. The watering device according to claim 1 or 2 , wherein the buffer plate is provided with a perforated plate having a large number of holes communicating with the opening. The watering device according to claim 3 , wherein the perforated plate is removable from the shock absorbing plate. A sprinkler used in an open rack vaporizer with a large number of heat transfer tubes lined up in one direction.
A trough that has a shape that extends along the arrangement direction of the large number of heat transfer tubes, has a supply port for introducing water as a heat source fluid at the bottom, and overflows the supplied water from the upper edge.
An opening is formed through the supply port to allow water introduced into the trough to pass, while a buffer plate that converts the water passing through the supply port into a longitudinal flow of the trough.
A top plate that is placed above the buffer plate and below the liquid level and that changes the water that has passed through the opening into a flow in the longitudinal direction of the trough.
A perforated member having a large number of holes for passing water flowing in the longitudinal direction of the trough along the buffer plate.
A front-stage cushioning member that is arranged below the buffer plate and fixed to the bottom of the trough to suppress the flow of water toward the buffer plate.
A sprinkler device including a top plate and a support member for supporting the buffer plate on the front-stage buffer member.

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