Water stop valve

Abstract

To provide a water stop valve capable of reducing an installation space and also facilitating repair and maintenance.SOLUTION: A water stop valve comprises: a valve body 2 having connection parts 12, 12 to which pipes M are connected at both ends; a bendable valve body 3 that opens and closes a flow path 11 in the valve body 2; a valve body housing part 4 that houses the valve body 3 in parallel with the flow channel 11 outside the flow path 11; a communication hole 13 that is provided in the valve body 2, and communicates between the valve housing part 4 and the flow path 11; and a guide part 14 that is provided in the valve body 2, bends the valve body 3 of the valve body housing part 4 from a horizontal direction to a vertical direction, and guides the valve body to the flow path 11 through the communication hole 13.SELECTED DRAWING: Figure 1

Description

[Technical field]

[0001] The present invention relates to a water stop valve. [Background technology]

[0002] 2. Description of the Related Art As valves for opening and closing a flow path through which water flows, gate valves (Patent Document 1) and butterfly valves (Patent Document 2) are known. [Prior art documents] [Patent documents]

[0003] [Patent Document 1] JP 2018-76928 A [Patent Document 2] JP 2016-94993 A Summary of the Invention [Problem to be solved by the invention]

[0004] Because a check valve does not leave the valve body in the flow path (pipe), maintenance such as repairing and cleaning the pipeline can be easily performed. However, there is a problem in that space to store the valve body is required in a direction perpendicular to the flow path, resulting in a large installation space.

[0005] On the other hand, butterfly valves require less installation space because the valve body and pipeline are integrated, but the valve body remains in the flow path (pipe), making it difficult to perform maintenance such as repairing and cleaning the pipeline.

[0006] In consideration of these problems, the present invention aims to provide a water stop valve that can reduce the installation space and can be easily repaired and maintained. [Means for solving the problem]

[0007] In order to achieve the above object, the present invention provides a valve body having connection portions to which pipes are connected at both ends, a bendable valve body that opens and closes a flow path within the valve body, a valve body storage portion that stores the valve body parallel to the flow path outside the flow path, a communication hole that is provided in the valve body and communicates between the valve body storage portion and the flow path, and a guide portion that is provided in the valve body and bends the valve body in the valve body storage portion from a horizontal direction to a vertical direction and guides it to the flow path via the communication hole, The communication hole is provided with a thin-walled portion that prevents water in the flow path from entering the valve body storage portion, and the valve body closes the flow path while destroying the thin-walled portion at the tip of the valve body as the valve body moves, and the valve body storage portion is water-sealed so that water does not flow out of the valve body storage portion after the thin-walled portion is destroyed. It is characterized by:

[0008] According to the present invention, by providing a valve body storage section that stores the valve body parallel to the flow path of the valve body, it is possible to reduce the installation space in the direction perpendicular to the flow path of the valve body. This makes it possible to accommodate pipelines with little soil covering. In addition, since the valve body is stored in the valve body storage section provided outside the flow path, the valve body does not remain in the flow path. This makes it easy to perform maintenance such as repairing and cleaning the valve body and flow path (pipe). Furthermore, according to the present invention, the thin-walled portion prevents water in the flow path from entering the valve body storage portion, thereby preventing deterioration of the valve body stored in the valve body storage portion and sticking of the movable parts, etc. Furthermore, the thin-walled portion is destroyed as the valve body moves, so it does not hinder the movement of the valve body.

[0009] It is also preferable that the valve device further comprises an operating unit that moves the valve body between the valve body storage section and the flow path, and an operating unit storage section that is arranged alongside the valve body storage section and stores the operating unit in parallel with the flow path.

[0010] According to the present invention, the valve body can be easily opened and closed, and the installation space for the operation portion storage unit in the direction perpendicular to the flow path of the valve body can be reduced.

[0011] It is also preferable that the valve body is configured by alternately connecting a plurality of rigid members and a plurality of flexible members that are provided extending in a direction perpendicular to the direction of movement of the valve body.

[0012] According to the present invention, a bendable valve body can be easily formed.

[0015] It is also preferable that the valve element storage portion is provided with an insertion guide that guides the valve element into the communication hole and the guide portion.

[0016] According to the present invention, the valve body can be smoothly guided into the guide portion. Effect of the Invention

[0017] According to the present invention, it is possible to provide a water stop valve that can reduce the installation space and can be easily repaired and maintained. [Brief description of the drawings]

[0018] [Figure 1] 1 is a side cross-sectional view showing a water stop valve according to a first embodiment of the present invention. [Diagram 2] FIG. 2 is a cross-sectional view taken along the line II-II of FIG. [Diagram 3] FIG. 2 is a cross-sectional view taken along the line III-III in FIG. [Figure 4] FIG. 4 is a cross-sectional view taken along the line IV-IV in FIG. [Diagram 5] FIG. 2 is a cross-sectional view taken along the line VV in FIG. [Figure 6] 1A is a plan view of a valve body, FIG. 1B is a side view, FIG. 1C is an enlarged plan view of a connecting member, and FIG. 1D is an exploded side view of the connecting member. [Figure 7] FIG. 2 is a side cross-sectional view showing a closed state of the water stop valve according to the first embodiment. [Figure 8] FIG. 8 is a cross-sectional view taken along the line VIII-VIII in FIG. 7. [Figure 9] FIG. 4 is a side cross-sectional view showing a water stop valve according to a second embodiment of the present invention. [Figure 10] 11 is a side cross-sectional view showing a water stop valve according to a third embodiment of the present invention in a state before a valve body and the like are installed. FIG. [Figure 11] 11 is a cross-sectional view taken along the line XI-XI in FIG. [Figure 12] A side cross-sectional view showing the state in which a valve body and other components are installed in a water stop valve according to a third embodiment. [Figure 13] 13 is a cross-sectional view taken along the line XIII-XIII in FIG. 12. [Figure 14] FIG. 11 is a side cross-sectional view showing a closed state of a water stop valve according to a third embodiment. DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS

[0019] [First embodiment] Hereinafter, an embodiment of a water stop valve according to the present invention will be described in detail with reference to the drawings. As shown in Fig. 1, the water stop valve 1 according to this embodiment is a valve that is connected between pipes M and M and stops the flow of circulating water. In the following description, "up and down," "left and right," and "front and back" follow the arrows in Figs. 1 and 2. Note that these directions are used for convenience of explanation and do not limit the installation direction of this embodiment.

[0020] The stop valve 1 comprises a valve box 2, a valve element 3, a valve element housing section 4, an operation section 5, and an operation section housing section 6. The valve box 2 is a tubular member with a flow path 11 through which water flows. The flow path 11 is a hollow section with a circular cross section. Water flowing through the stop valve 1 flows in the direction of arrow P in FIG. 1 (from the front side to the rear side). At both ends in the front-to-rear direction of the valve box 2, circular connection parts (flange parts) 12, 12 that protrude outward in the circumferential direction are formed. The connection part 12 is a part that is connected to the connection part (flange part) of the pipe M. Although a flange part is provided in this embodiment, the flange part may be omitted and a plug-in joint may be used.

[0021] The valve box 2 has a rectangular cross section to match the shape of the valve disc 3 (rectangular in this embodiment) which will be described later. When a circular valve disc is used, the lower part 2B of the valve box 2 may be made arc-shaped to match the shape. The upper part 2A of the valve box 2 is formed with a communication hole 13 which opens in the left-right direction. The communication hole 13 is an opening through which the valve disc 3 moves. The communication hole 13 has a size and shape which allows the valve disc 3 to move.

[0022] As shown in Figs. 1 and 5, the guide portion 14 is provided on the inner surface of the side portions 2C, 2C of the valve box 2, and is a groove that guides the valve body 3 to the flow path 11 and serves as a valve seat. The guide portion 14 communicates with the communication hole 13 and is provided over the entire upper and lower portions of the valve body 3 from the upper portion 2A to the lower portion 2B. The left-right width W1 and the front-rear width W2 of the guide portion 14 are formed to have a size and shape that allows the valve body 3 to move. The guide portion 14 may be formed perpendicular to the front-rear axis, but in this embodiment, as shown in Fig. 1, it is formed so as to incline backward as it approaches the downstream side. The inclination angle of the guide portion 14 may be appropriately set within a range of 60 to 90° as the opening angle from the lower portion 2B of the valve box 2.

[0023] The valve body 3 is a bendable member that opens and closes the flow path 11 of the valve box 2. As shown in (a) and (b) of FIG. 6, the valve body 3 has a rectangular plate shape in a plan view in this embodiment. As shown in (a) of FIG. 6, the valve body 3 is configured by alternately connecting rigid members 21 (drawn in hatch) and flexible members 22 (drawn in white). The rigid members 21 are rod-shaped members that have a rectangular cross section and extend in the left-right direction. The rigid members 21 may be made of any material with high rigidity, but are made of metal in this embodiment. As shown in (c) and (d) of FIG. 6, adjacent rigid members 21, 21 are connected to each other via a connecting member 23. A plurality of connecting members 23 are provided in the left-right direction.

[0024] The connecting member 23 is composed of a connecting piece 24 provided on one of the rigid members 21, a connecting piece 24 provided on the other rigid member 21, and a connecting pin 25. The connecting piece 24 is fixed to the rigid member 21 and is, for example, a metal plate-like member. The connecting piece 24 is formed with a long hole 24a extending in the front-rear direction. The connecting pin 25 is cylindrical and is inserted into the long holes 24a, 24a. The connecting pin 25 is formed to be movable in the front-rear direction within the long holes 24a, 24a, and the connecting pieces 24, 24 are formed to be rotatable relative to each other. The rigid member 21 (see FIG. 6(a)) disposed at the front end (the frontmost part) of the valve body 3 is connected to an operating shaft 18 described later.

[0025] The flexible member 22 is disposed in the gap between the adjacent rigid members 21, 21, and is formed of a flexible material. The flexible member 22 can be formed of, for example, rubber or soft resin. The flexible member 22 covers the gap between the rigid members 21, 21 so that the connecting member 23 is not exposed to the outside. The rear end portion (the rearmost part) of the valve body 3 is formed of the flexible member 22. In other words, the part where the valve body 3 and the lower part 2B of the valve box 2 (the bottom part of the flow path 11) come into contact with each other is the flexible member 22.

[0026] The valve body 3 is configured to bend in the up-down direction as a whole because adjacent rigid members 21, 21 are formed to rotate with respect to each other by the connecting member 23. Also, the hole formed in the connecting piece 24 may be a round hole, but by forming it as an elongated hole 24a as in this embodiment, the valve body 3 can be expanded and contracted in the front-rear direction as a whole.

[0027] Although the valve body 3 is formed as described above in this embodiment, it may have any configuration and may be made of any material as long as it is bendable. It is preferable to rubber line the entire surface of the valve body 3. This can prevent corrosion of the valve body 3 and improve the water-stopping ability. Sliding members such as guide rollers may be provided on both sides of the valve body 3. This allows the valve body 3 to move smoothly. The sliding members may be provided only on both sides of the rear end of the valve body 3.

[0028] As shown in Figs. 1 to 4, the valve body storage section 4 is provided on the valve box 2, and is a portion (hollow section) for storing the valve body 3. The valve body storage section 4 stores the valve body 3 outside the flow path 11 and parallel to the flow path 11. The valve body storage section 4 is composed of a front wall 4a, a rear wall 4b, an upper wall 4c, side walls 4d, 4d, and an upper part 2A of the valve box 2. The front-rear dimension of the valve body storage section 4 is formed so that the rear end (tip) of the valve body 3 faces the communication hole 13 when the valve body 3 is fully open. The up-down dimension of the valve body storage section 4 is slightly larger than the plate thickness of the valve body 3.

[0029] The operation unit 5 is a drive mechanism that moves the valve body 3 between the flow path 11 and the valve body storage unit 4. The operation unit 5 is composed of an actuator such as a cylinder that can push and pull the valve body 3 in the front-rear direction. The cylinder can be, for example, a hydraulic, pneumatic, electric, or water hydraulic cylinder. The operation unit 5 and the valve body 3 are connected via a rod-shaped operation shaft 18. That is, the base end side of the operation shaft 18 is connected to the operation unit 5, and the tip end side is connected to the front part of the valve body 3. The operation shaft 18 is supported by a water seal bearing 19 provided on the front wall 4a of the valve body storage unit 4 so as to be slidable in the front-rear direction. Instead of the water seal bearing 19, the operation shaft 18 may be supported by a packing such as an O-ring and a bush.

[0030] As shown in Figs. 1 and 2, the operation unit storage section 6 is provided on the valve box 2, and is a portion (hollow section) that stores the operation unit 5. The operation unit storage section 6 is provided in juxtaposition to the front side of the valve body storage section 4, and stores the operation unit 5 parallel to the flow path 11. The operation unit storage section 6 is composed of a front wall 6a, side walls 6b, 6b, an upper wall 6c, a front wall 4a of the valve body storage section 4, and an upper portion 2A of the valve box 2. The vertical dimension of the operation unit storage section 6 is slightly larger than the vertical dimension of the operation unit 5. The height position of the upper wall 6c is at the same height position as the upper wall 4c of the valve body storage section 4.

[0031] <When the valve is open> Next, the operation of the stop valve 1 according to this embodiment will be described. As shown in Fig. 1, when the valve is open, the valve body 3 is entirely housed in the valve body housing 4. The rear end of the valve body 3 faces the communication hole 13. The operating shaft 18 is housed to the greatest extent within the operating portion 5. Since the flow path 11 is fully open, water flows in the direction of the arrow P.

[0032] <When the valve is closed> 7 and 8, by driving the operating part 5 to move the operating shaft 18 backward, the valve element 3 moves backward and is guided by the guide parts 14, 14 to close the flow path 11. In other words, the valve element 3 moves in a direction perpendicular to the flow direction of the flow path 11 to close the flow path 11. When the operating shaft 18 is fully extended relative to the operating part 5, the rear end of the valve element 3 abuts against the lower part 2B of the valve box 2. This allows the stop valve 1 to be closed.

[0033] <When valve is reopened> To reopen the valve, the operation unit 5 is driven to move the operating shaft 18 forward, which moves the valve element 3 forward and guides the valve element 3 along the guide portions 14, 14 to open the flow path 11. When the operating shaft 18 is fully contracted relative to the operation unit 5, the entire valve element 3 is stored in the valve element storage portion 4.

[0034] According to the stop valve 1 of this embodiment described above, by providing the valve body storage section 4 that stores the valve body 3 parallel to the flow path 11 of the valve box 2, it is possible to reduce the installation space in the direction perpendicular to the flow path 11 of the valve box 2 (up and down direction). This makes it possible to accommodate pipelines with little soil covering. In addition, since the valve body 3 is stored in the valve body storage section 4 provided outside the flow path 11, the valve body 3 does not remain in the flow path 11. This makes it easy to perform maintenance such as repair and cleaning of the valve body 3 and the flow path 11 (pipe).

[0035] In addition, the valve body 3 is opened and closed by the operating unit 5 configured with an actuator, so that the opening and closing operations can be easily performed. In addition, the operating unit storage section 6 also stores the operating unit 5 parallel to the flow path 11, so that the installation space in the direction perpendicular to the flow path 11 of the valve box 2 (the vertical direction) can be reduced.

[0036] Furthermore, since the valve body 3 is constructed by alternately connecting a plurality of rigid members 21 and a plurality of flexible members 22 extending in a direction perpendicular to the movement direction of the valve body 3, a bendable valve body 3 can be easily formed.

[0037] [Second embodiment] Next, a water stop valve 1A according to a second embodiment of the present invention will be described. As shown in Fig. 9, the water stop valve 1A includes a valve box 2, a valve body 3, a valve body storage section 4, an operation section 5A, and an operation section storage section 6A. In the second embodiment, the operation section 5A and the operation section storage section 6A are different from those in the first embodiment, so the different parts will be mainly described.

[0038] The operation unit 5A includes a drive source (not shown), an opening / closing shaft 51, a worm wheel 52, a worm 53, and a swivel joint 54. The opening / closing shaft 51 is an axial member extending in the vertical direction. One end of the opening / closing shaft 51 is fixed to the worm wheel 52, and the other end is exposed to the outside from the operation unit storage section 6A described below. The other end of the opening / closing shaft 51 is a portion that is connected to a drive source such as a rotating tool or a rotating device (not shown).

[0039] The worm wheel 52 is fixed to one end of the opening / closing shaft 51 and meshes with the worm 53. The worm 53 extends in the front-rear direction. A swivel joint 54 is attached to the worm 53, which is movable in the extension direction of the worm 53 as the worm 53 rotates. The swivel joint 54 and the valve body 3 are connected via an L-shaped operating shaft 18A.

[0040] The operation part storage section 6A is a portion (hollow section) that stores the operation part 5A. The operation part storage section 6A is composed of a front wall 61, a rear wall 62, an upper wall 63, a pair of side walls (not shown), and an upper portion 2A of the valve box 2. The rear wall 62 of the operation part storage section 6A is provided on the rear wall 4b of the valve body storage section 4. The dimension in the front-to-rear direction from the front wall 61 to the rear wall 62 is approximately twice the size of the worm 53.

[0041] In the water stop valve 1A according to the second embodiment, by rotating the opening / closing shaft 51, the valve body 3 moves in the front-rear direction, and the flow path 11 can be opened or closed. In other words, when the opening / closing shaft 51 rotates, the worm 53 rotates about its axis via the worm wheel 52. As the worm 53 rotates, the swivel joint 54 and the operating shaft 18A move in the front-rear direction. This allows the valve body 3 to move forward or backward.

[0042] According to the water stop valve 1A of the second embodiment, since it is provided with a conversion mechanism that converts the rotation of the opening / closing shaft 51 into the parallel movement of the valve body 3, the valve body 3 can be opened and closed easily. Furthermore, the use of a worm gear allows the operation unit 5A to be configured simply. Furthermore, since the operation unit storage section 6A stores the operation unit 5A parallel to the flow path 11, the vertical dimension of the operation unit storage section 6A can be minimized, and the installation space can be reduced. Although the operation unit 5A is configured with a worm gear in this embodiment, it may be configured with, for example, a rack and pinion.

[0043] [Third embodiment] Next, a water stop valve 1B according to a third embodiment of the present invention will be described. As shown in Fig. 10, the water stop valve 1B differs from the above-described embodiments in that it is provided with a thin-walled portion 70 and that the valve body 3 and the like are not installed under normal conditions. In the third embodiment, the differences from the other embodiments will be mainly described.

[0044] As shown in Figs. 10 and 11, the water stop valve 1B has a thin-walled portion 70 in the communication hole 13 of the valve box 2. The thin-walled portion 70 is formed of a thin plate-like resin, metal, or film, and blocks the communication hole 13. This prevents water in the flow path 11 from flowing out to the valve body storage portion 4B. On the other hand, the thin-walled portion 70 is destroyed by the rear end of the valve body 3 when the valve body 3 is moved toward the flow path 11 after the valve body 3 and other components are installed. In other words, the thin-walled portion 70 is a member that has a water stop function and is destroyed as the valve body 3 moves. A cutter portion may be provided at the rear end (tip) of the valve body 3 so that the thin-walled portion 70 can be easily destroyed.

[0045] The valve body storage section 4B is composed of a water stop plate N, a rear wall 4b, an upper wall 4c, side walls 4d, 4d, and the upper part 2A of the valve box 2. The water stop plate N is a plate-like member that covers the front side of the valve body storage section 4B to prevent water from entering the valve body storage section 4B. The water stop plate N is installed detachably relative to the upper wall 4c and the side walls 4d, 4d.

[0046] When closing the water stop valve 1B, as shown in Figs. 12 to 14, the water stop plate N (see Fig. 10) is removed, and the valve body 3, water sealing device 71, and insertion guide 72 are installed in the valve body storage section 4B. The valve body 3 is the same member as in the first embodiment. The operating shaft 18 of the valve body 3 may be provided with an operating section 5 constituted by an actuator as in the first embodiment, or the operating shaft 18 may be moved forward or backward manually.

[0047] The water sealing device 71 is a device that stops water flow in front of the valve body storage section 4B and slidably supports the operating shaft 18. The insertion guide 72 is a member provided in the valve body storage section 4B on the rear side of the communication hole 13. The insertion guide 72 is a guide that guides the tip of the valve body 3 toward the thin-walled section 70 when the valve body 3 is moved toward the flow path 11. The insertion guide 72 can be, for example, a cylindrical member extending in the left-right direction. The insertion guide 72 may have any other shape as long as it is a shape that can guide the rear end (tip) of the valve body 3 toward the thin-walled section 70.

[0048] 12 and 14, when closing the stop valve 1B, the operating shaft 18 is moved backward to push the valve element 3 into the communication hole 13 and the thin-walled portion 70. At this time, the thin-walled portion 70 is destroyed by the tip of the valve element 3, and the valve element 3 is guided along the guide portion 14 through the communication hole 13 to the flow path 11 side. This allows the stop valve 1B to be closed.

[0049] When the water stop valve 1B is opened, it can be opened in the same manner as in the first embodiment. After the opening and closing of the valve body 3 is completed, the valve body 3, the water sealing device 71, and the insertion guide 72 may be left installed, or the valve body 3 and the like may be removed from the valve body storage section 4B and the water stop plate N may be reinstalled.

[0050] According to the water stop valve 1B of the third embodiment, since the valve body 3, the operating unit 5, etc. are not normally installed in the valve body storage section 4B, it is possible to prevent deterioration of the valve body 3, the operating unit 5, etc., and adhesion of movable parts, etc. Furthermore, by providing the thin-walled section 70, it is possible to prevent water from leaking outside the flow path 11. Furthermore, since the thin-walled section 70 is destroyed as the valve body 3 moves, it does not impede the movement of the valve body 3 when the valve is closed.

[0051] Although the embodiments of the present invention have been described above, appropriate design changes are possible within the scope of the present invention. For example, the thin-walled portion 70 may be provided in the first and second embodiments. This prevents water from entering the valve body housing portion 4 under normal circumstances, thereby preventing deterioration of the valve body 3. Also, in the first and second embodiments, the operating shaft 18 may be moved forward or backward manually or by using another device. [Explanation of symbols]

[0052] 1. Water stop valve 2 Valve box 3 Valve body 4 Valve body storage section 5 Control section 6 Control unit storage area 11 Flow Path 12 Connection part (flange part) 13 Communication hole 14 Guide section 21 Rigid members 22 Flexible member 23 Connecting members 70 Thin section 72 Insertion guide

Claims

1. A valve body having connection parts to which pipes are connected at both ends; A bendable valve body that opens and closes a flow path in the valve body; a valve body housing portion that houses the valve body in parallel with the flow path outside the flow path; A communication hole provided in the valve box and communicating between the valve body housing portion and the flow path; a guide portion provided in the valve box, bending the valve body of the valve body storage portion from a horizontal direction to a vertical direction and guiding the valve body to the flow path through the communication hole; a thin-walled portion provided in the communication hole for preventing water in the flow path from entering the valve body housing portion; As the valve body moves, the tip of the valve body breaks the thin-walled portion and closes the flow path, A water stop valve, characterized in that the valve body storage portion is sealed so that water does not flow out of the valve body storage portion after the thin-walled portion is destroyed.

2. an operation unit that moves the valve body between the valve body storage unit and the flow path; 2. The water stop valve according to claim 1, further comprising an operating portion housing portion arranged alongside the valve body housing portion and housing the operating portion in parallel with the flow path.

3. The valve body is 3. The water stop valve according to claim 1, characterized in that the water stop valve is constructed by alternately connecting a plurality of rigid members and a plurality of flexible members that are extended in a direction perpendicular to the moving direction of the valve body.

4. 4. The water stop valve according to claim 1, wherein the valve body storage portion is provided with an insertion guide that guides the valve body into the communication hole and the guide portion.

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