JP2017026101A - Valve device - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a valve device that is excellent in practicality such as a superior strength as compared with that of a prior art mesh structure and can be easily realized under application of a metal laminate molding method.SOLUTION: This invention relates to a valve device comprising a valve mechanism arranged at the midway part of a flow passage 1 and constituted by a valve seat 2 and a valve body 4 for closing in an openable or closable manner a flowing hole 3 arranged at this valve seat 2 and a pressure reducing mechanism for reducing pressure of fluid passing through a flowing clearance between this valve body 4 and the valve seat 2 when the valve body 4 is released and moved to open the flowing hole 3 to release the flow passage 1 and the pressure reducing mechanism is constituted by arranging a mesh flowing part 10 having a plurality of laminated inner side sash rows and outer side sash rows having a plurality of metallic sashes that are integrally formed by a lamination forming process in a flowing direction of fluid at a cylinder 5 arranged to enclose the flowing clearance between the valve body 4 and the valve seat 2 generated when the flow passage 1 is released.SELECTED DRAWING: Figure 1

Description

  The present invention relates to a valve device.

  Conventionally, various decompression regulating valves for high-pressure fluid have been proposed. For example, Patent Document 1 includes a plurality of flow holes (meandering flow paths) having a right-angled bend, and pressure heads are formed by bending the flow holes. A technique for suppressing noise and cavitation by dissipating energy and reducing the pressure of a high-pressure fluid is disclosed.

  Further, for example, Patent Document 2 discloses a technology that suppresses generation of noise and the like by reducing the size of a jet of fluid by allowing a high-pressure fluid to pass through a large number of small holes (porous channels). .

  The conventional pressure reducing valve is designed to suppress the noise as much as possible by using either the meandering channel or the perforated channel, but further improvement is desired to further reduce the noise. This is the current situation.

JP 2005-90555 A JP 2011-236862 A

  The present invention has been made in view of the current situation as described above, and is superior in strength to the conventional mesh structure, and also has a predetermined mesh structure, and in particular, has an excellent flow diffusion action above the fluid. It is possible to provide a valve device with excellent practicality that can be easily obtained using a metal additive manufacturing method.

  The gist of the present invention will be described with reference to the accompanying drawings.

  A valve mechanism provided in the middle of the flow passage 1 and configured to open and close the valve seat 2 and the flow hole 3 provided in the valve seat 2 so as to be openable and closable; A valve device comprising a decompression mechanism for decompressing a fluid passing through a flow gap between the valve body 4 and the valve seat 2 when the flow hole 3 is opened and the flow passage 1 is opened; A plurality of metal crosspieces 6 integrally formed by a layered manufacturing method on a cylindrical body 5 provided so as to surround a flow gap between the valve body 4 and the valve seat 2 generated when the flow passage 1 is opened. Are provided in parallel to each other in the direction of fluid flow to provide a mesh circulation portion 10 provided in a stacked state in the fluid flow direction. The present invention relates to a valve device that is configured.

  The mesh flow section 10 is provided with a large number of pipe portions 21 that form the flow paths 22 penetrating the inside and outside of the cylindrical body 5, and the cross-sectional areas of the flow paths 22 of the respective pipe sections 21 are respectively 2. The valve device according to claim 1, wherein the cross-sectional area of the opening between each crosspiece 6 of the mesh 9 is larger.

  The mesh 9 is formed by superimposing the inner side rows 7 and the outer side rows 8 in a slanted lattice shape, and includes an inner surface and an upper surface of the cross 6 constituting the inner side rows 7 and the outer side rows 8. 2. The guide inclined surface 11 for guiding the upward diffusion of the fluid that passes through the mesh circulation portion 10 is provided on each of the inner upper edge portions that are boundary portions of the first and second boundary portions. This relates to the valve device described in item 1.

  In addition, in the state where the opening on the innermost side of the upper part of the mesh circulation part 10 is closed by the valve body 4, it flows in from the opening on the innermost part of the lower part of the mesh circulation part 10 not closed by the valve body 4. The valve device according to claim 3, wherein the guiding inclined surface 11 is configured to guide the fluid to the upper region side.

  5. The valve device according to claim 3, wherein the guide inclined surface 11 is provided over the entire area of the inner upper edge of the crosspiece 6.

  6. The valve device according to claim 3, wherein the guiding inclined surface 11 is a concavely curved surface.

  Moreover, the parallel arrangement | positioning space | interval of each cross | link 6 which comprises the said inner side row | line 7 and the said outside side row | line | column 8 was set to 0.5 mm-20 mm, The any one of Claims 1-6 characterized by the above-mentioned. This relates to the valve device.

  Since the present invention is configured as described above, it is superior in strength compared to the conventional mesh structure, and by providing a predetermined mesh structure, it is possible to obtain a particularly favorable flow diffusion action above the fluid. Thus, the valve device can be easily realized by using the metal additive manufacturing method and has excellent practicality.

It is explanatory sectional drawing of a present Example. 10 is an explanatory cross-sectional view of another example 1. It is an expansion outline explanatory sectional view of the important section of this example. 10 is an enlarged schematic explanatory front view of a main part of another example 2. FIG. 10 is an enlarged schematic explanatory front view of a main part of another example 3. FIG.

  An embodiment of the present invention which is considered to be suitable will be briefly described with reference to the drawings showing the operation of the present invention.

  When the valve body 4 is opened and the flow hole 3 of the valve seat 2 is opened to open the flow passage 1, the fluid that has passed through the flow hole 3 of the valve seat 2 passes through the mesh flow portion 10 of the cylinder 5. And is discharged from the outlet of the flow passage 1.

  At this time, even a high-pressure fluid can be reduced in pressure by passing a large number of openings between the crosspieces 6 of the mesh circulation part 10.

  In addition, the mesh distribution section 10 is a structure in which the crosspieces 6 constituting each mesh 9 are integrally formed by the layered molding method, and has excellent strength as compared to a structure in which metal meshes are simply laminated, and with respect to a high-pressure fluid. Also demonstrates excellent durability.

  Further, for example, when the guiding inclined surface 11 is provided on the inner upper edge portion of the crosspiece 6, the guiding inclined surface 11 allows the upward diffusion of the high pressure fluid to be performed well, and the vertical direction with respect to the high pressure fluid is performed. The resistance force can be made minute, and a high pressure fluid can be diffused well in the mesh circulation part 10 to obtain a good pressure reduction effect while suppressing an increase in flow rate due to expansion.

  In particular, the fluid flowing in from the innermost opening of the lower region of the mesh circulation part 10 that is not blocked by the valve body 4 in the state where the opening of the uppermost area of the mesh circulation part 10 is closed by the valve body 4. By configuring the guiding inclined surface 11 to guide to the upper region side, the noise suppression effect near the low valve opening is increased.

  Specific embodiments of the present invention will be described with reference to the drawings.

  In this embodiment, a valve mechanism that is provided in the middle of the flow passage 1 and includes a valve seat 2 and a valve body 4 that closes the flow hole 3 provided in the valve seat 2 so as to be openable and closable; A valve device comprising a pressure reducing mechanism that decompresses the fluid passing through the flow gap between the valve body 4 and the valve seat 2 when the flow passage 1 is opened by opening the flow hole 3 by opening. In the cylindrical body 5 provided so as to surround the flow gap between the valve body 4 and the valve seat 2 that is generated when the flow passage 1 is opened, a plurality of parts are integrally formed by an additive manufacturing method. A mesh distribution section 10 is provided in which a plurality of meshes 9 formed by superimposing inner rows 7 and outer rows 8 formed by arranging metal beams 6 in an oblique lattice shape are provided in a stacked state in the fluid flow direction. An inner side surface and an upper surface of the beam 6 constituting the inner beam 7 and the outer beam 8. The inner upper edge which is the boundary portion, respectively, is provided with a guiding inclined surface 11 for inducing diffusion of the above said fluid passing through the mesh distribution unit 10.

  In this embodiment, as shown in FIG. 1, a globe valve mechanism that is provided in the center of the flow passage 1 formed in the main body 20 and opens and closes the flow passage 1 and a fluid that passes through the opened globe valve mechanism is decompressed. And a pressure reducing mechanism that is used in a plant in which a high-pressure fluid flows.

  An inlet side pipe connection part and an outlet side pipe connection part (not shown) to which pipes are respectively connected are provided at both ends of the flow passage 1 of the main body 20.

  A horizontal annular valve seat 2 is provided at the center of the flow passage 1 of the main body 20, and a valve body 4 is provided so as to be movable toward and away from the valve seat 2. In the figure, reference numeral 15 is a valve shaft, 16 is a connection member, and 17 is a connection bolt.

  Around the valve body 4, a metal cylinder 5 is provided so as to surround a flow gap generated when the valve body 4 is detached from the valve seat 2. Specifically, the outer diameter of the valve body 4 is the same diameter or slightly smaller than the inner diameter of the cylinder body 5 so that the valve body 4 slides on the inner peripheral surface of the cylinder body 5. . That is, the fluid does not leak from between the valve body 4 and the cylindrical body 5. Therefore, most of the fluid flowing through the flow hole 3 of the valve seat 2 and flowing into the cylindrical body 5 flows out through the mesh flow portion 10 of the cylindrical body 5 and travels toward the outlet side.

  In the present embodiment, the cylindrical body 5 is configured by providing the frame body 12 with the mesh distribution portion 10. Specifically, the cylindrical body 5 has a cylindrical shape that is slightly larger in diameter than the outer peripheral shape of the valve body 4, and is configured by integrally providing the mesh flow portion 10 in the frame hole of the cylindrical frame-shaped frame body 12. . That is, each mesh 9 constituting the mesh circulation part 10 exhibits the same curved shape as the whole or a part of the outer peripheral surface of the valve body 4.

  In addition, as another example 1 illustrated in FIG. 2, the cylindrical body 5 may be provided with a large number of window holes 14 in the cylindrical main body 13, and the mesh circulation portion 10 may be provided in each window hole 14. In this case, the cylindrical body 5 is more excellent in strength.

  As shown in FIG. 3, the mesh distribution unit 10 is configured so that a mesh 9 formed by superposing an inner beam 7 and an outer beam 8 in which a plurality of beams 6 are arranged in parallel in a slanted lattice shape is flow direction of the fluid. A plurality of stacked layers are provided.

  A large number of fine meshes (openings) of the mesh 9 are continuously provided in the thickness direction of the cylindrical body 5 in the mesh circulation part 10 to form a pressure reducing flow path. Therefore, the high-pressure fluid that passes through the mesh circulation part 10 of the cylinder 5 is well decompressed by passing through a number of meshes.

  In the present embodiment, the inner lane 7 (or the outer lane 8) of each mesh 9 is partially or entirely in front of the inner lane 7 (or the outer lane 8) of the inner and outer meshes. A structure is provided so as to overlap. In addition, like the other example 2 illustrated in FIG. 4, the inner side row 7 (or the outer side row 8) of the mesh 9 is the inner side row 7 (or the outer side row 8) of the other innermost or outer mesh. It may be configured to be arranged between the inner side rows 7 (or the outer side rows 8) of other meshes inside or outside the nearest (for example, at an intermediate position between the bars) Placement.). That is, for example, the crosspieces 6 (18b, 19b) of the even-numbered mesh 9 are arranged between the cross-pieces 6 (18a, 19a) of the odd-numbered mesh 9, respectively. It is good also as a structure shifted alternately with the odd-numbered mesh 9. FIG. In this case, the flow path can be miniaturized without reducing the mesh of the mesh 9.

  Further, a guiding inclined surface 11 is provided on the inner upper edge of each crosspiece 6. Specifically, the guiding inclined surface 11 is configured as a concave curved surface in section so as not to hinder the flow of fluid as much as possible. The guiding inclined surface 11 is provided over the entire area of the inner upper edge of the crosspiece 6. Accordingly, not only is the flow of fluid upward inhibited by the inner upper edge of the crosspiece 6, but also the fluid is spirally guided along the guiding inclined surface 11 to the upper end position of the mesh circulation portion 10. Is also possible. Therefore, the present embodiment has a configuration in which an upward fluid diffusing action can be obtained satisfactorily.

  Therefore, for example, in the state where the opening in the uppermost region of the mesh circulation portion 10 is closed by the valve body 4, the opening in the innermost region of the lower region of the mesh circulation portion 10 not closed by the valve body 4 is used. The guiding inclined surface 11 can be configured to guide the fluid that has flowed into the upper region side.

  Moreover, the cylinder 5 has a thickness of 3 mm to 60 mm and is made of metal, and is formed using a layered modeling method (an optical modeling method, a powder sintering layered modeling method, a hot melt lamination method, an inkjet method, or the like) ( It is formed using a 3D printer.) That is, the frame body 12 and the mesh bars 6 of each mesh constituting the mesh distribution part 10 are integrally formed, and an intersection portion between the bars 6 and a contact portion between the bars 6 and the frame body 12 are formed. It is an integrated structure that is firmly connected.

Moreover, it is preferable that the parallel arrangement interval of the rails 6 constituting the inner beam 7 and the outer beam 8 is set to 0.5 mm to 20 mm, respectively, so as to obtain a good noise reduction action. Therefore, the opening area of the opening of桟間becomes approximately 0.25mm ² ~400mm ^2. In the present embodiment, the shape of the opening of the mesh is set to a square shape, but may be another polygonal shape such as a triangle or a pentagon. Further, the width (and thickness) of the crosspiece 6 is preferably set to 0.5 to 20 mm so that sufficient structural strength can be obtained. In the present embodiment, the number of layers of the mesh 9 is set to 3 stages, but can be appropriately set between 2 to 15 stages.

  Further, for example, as in another example 3 illustrated in FIG. 5, a large number of pipe parts 21 that form flow paths 22 that penetrate the inside and outside of the cylindrical body 5 are provided in the mesh distribution part 10 in a juxtaposed manner. The cross-sectional area of the channel 22 of 21 may be set larger than the cross-sectional area of the opening between the crosspieces 6 of the mesh 9. In this case, the guiding inclined surface 11 may or may not be provided.

  The tube portion 21 is a straight cylinder and is disposed in a horizontal state, and is integrally formed with the crosspiece 6 and the like by the layered modeling method as described above. In addition, the cross-sectional area of the flow path 22 of the pipe portion 21 is set to approximately 1.5 to 2.0 times the opening between the crosspieces 6 of the mesh 9. In addition, the ratio of the flow area of the mesh circulation part 10 before installation of the pipe part and the total flow area of the flow path 22 of each pipe part 21 (mesh circulation part flow area / pipe part flow area), The cross-sectional area and the number of arrangement of the pipe part 21 are set so as to be about 1.5 to 20.

  In this embodiment, a plurality of tube portions 21 (a pair of upper and lower sides in the present embodiment) aligned along the vertical direction are arranged in parallel in the circumferential direction of the cylindrical body 5. Further, the pipe portions 21 adjacent in the circumferential direction of the cylindrical body 5 are arranged in a zigzag shape with their height positions being alternately changed.

  In the case of another example 3, it becomes possible to suppress clogging of the mesh 9 and contribute to downsizing of the apparatus by securing a larger flow area with noise reduction performance equivalent to or better than that of the existing pressure reducing mechanism. It becomes.

  Note that the present invention is not limited to this embodiment, and the specific configuration of each component can be designed as appropriate.

DESCRIPTION OF SYMBOLS 1 Flow path 2 Valve seat 3 Flow hole 4 Valve body 5 Cylindrical body 6 Cross 7 Inner side 8 Outer side 9 Mesh
10 Mesh distribution department
11 Inclined surface for guidance
21 Pipe
22 Flow path

Claims (7)

  A valve mechanism that is provided in the middle of the flow passage and is configured to include a valve seat and a valve body that opens and closes the flow hole provided in the valve seat; and opens the flow hole by opening and moving the valve body. When the flow passage is opened, the valve device includes a pressure reducing mechanism for reducing the pressure of the fluid passing through the flow gap between the valve body and the valve seat, and the valve is generated when the flow passage is opened. Lattice is formed of a plurality of metal bars arranged in parallel in a cylindrical body provided so as to enclose a flow gap between the body and the valve seat. A valve device characterized in that the pressure reducing mechanism is configured by providing a mesh circulation portion in which a plurality of meshes formed in the shape of a fluid are provided in a laminated state in the fluid flow direction.   In the mesh distribution part, a large number of pipe parts forming flow paths penetrating the inside and outside of the cylindrical body are provided in a juxtaposed state, and the cross-sectional areas of the flow paths of the pipe parts are respectively openings between the mesh crosspieces. The valve device according to claim 1, wherein the valve device is larger than a cross-sectional area of the portion.   The mesh is formed by superposing the inner side rows and the outer side rows in a slanted lattice shape, and an inner upper edge that is a boundary portion between the inner side surface and the upper surface of the side rails constituting the inner side rows and the outer side rows. The valve device according to any one of claims 1 and 2, wherein each of the portions is provided with a guiding inclined surface that guides upward diffusion of the fluid that passes through the mesh circulation portion.   The fluid flowing in from the innermost opening of the lower region of the mesh circulation part that is not blocked by the valve body in a state in which the opening of the innermost region of the mesh circulation part is closed by the valve body. 4. The valve device according to claim 3, wherein the guiding inclined surface is configured to guide toward the region side.   The valve device according to any one of claims 3 and 4, wherein the guiding inclined surface is provided over the entire area of the inner upper edge of the crosspiece.   The valve device according to any one of claims 3 to 5, wherein the guiding inclined surface is a concavely curved surface.   The valve device according to any one of claims 1 to 6, wherein an interval between the rails constituting the inner beam and the outer beam is set to 0.5 mm to 20 mm.

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