JP6717615B2 - Valve device - Google Patents

Description

The present disclosure relates to a valve device used for a fluid flow path such as water supply.

In recent years, in branch pipe connection work to provide a branch pipe in the middle of an existing fluid pipe such as a water pipe, the peripheral wall of the fluid pipe is pierced while maintaining the state of uninterrupted water without stopping the flow path upstream. The method of connecting branch pipes is adopted. In this construction method, various valve devices are used.

For example, in Patent Document 1, a branch case configured by a plurality of divided bodies that are mounted so as to surround a fluid pipe, a branch pipe that is connected by sandwiching an end portion between split faces of the branch case, and a flow of the branch pipe A valve device is disclosed that has a valve body that moves between a closed position that shuts off the passage and an open position that opens the shutoff. The valve body is configured to be able to move in and out of the branch pipe through a penetrating insertion port formed in the branch pipe, and is used to close the branch pipe.

Patent Document 2 discloses a valve device that includes a branch case, a branch pipe that is connected by sandwiching an end portion between split surfaces of the branch case, and a valve body that opens and closes internal communication between the branch pipe and the branch case. ing. The valve body is configured to be able to move in and out of the branch case through a through insertion port formed in the branch case, and is used to close the internal communication between the branch case and the branch pipe.

Patent Document 3 discloses a valve device also called a work sluice valve, which has a tubular valve body connected to a branch pipe of a branch case and a valve body that opens and closes an internal flow path of the valve body. .. The valve body is used to close the valve box when a device such as a punching machine connected to the valve box is attached or detached.

Patent Document 4 discloses a casing that is hermetically fitted onto a peripheral surface of a fluid pipe in a state where a required space is formed, and an arc-shaped valve that is provided in the required space and can close a branch port of the casing A body and a drive device for moving the valve body along the inner circumference of the housing, and the drive device has a rotary shaft that meshes with a pinion formed on the valve body, and the rotary shaft rotates to rotate the valve body. There is disclosed a valve device for moving the valve along the inner circumference of the housing.

JP, 2014-95476, A JP, 2011-106572, A JP 2012-240168 A JP, 2014-84920, A

However, in the above-mentioned conventional valve device, it is necessary to compress the seal member provided on the metal valve body to stop water. Therefore, a structure in which the seal member is brought into contact with the housing (branch case, valve box) and rubs in a compressed state is adopted, or a structure in which the seal member is compressed by the force of pressing the valve body against the housing is adopted. ing. A relatively large operating force is required to drive the valve element via an operating unit such as a lever or a handle.

The present disclosure has been made focusing on such a problem, and its purpose is to improve the operability by reducing the operating force required when moving the valve body while securing the waterproofness. It is to provide a valve device that makes it possible.

The present disclosure takes the following measures in order to achieve such an object.

That is, the valve device of the present disclosure is
A housing that communicates with the water pipe and constitutes a part of the flow path,
A valve body movable between a closed position that closes the flow passage and an open position that opens the flow passage,
A drive mechanism for moving the valve body,
A bag provided at a portion of the valve body facing the housing in the closed position,
A bag body conduction path that enables fluid to be taken in and out of the bag body;
After the valve body is moved to the closed position by the drive mechanism, a fluid is supplied to the bag body through the bag body conduction path to expand the bag body, so that the expansion force of the bag body causes the valve body to move. It is configured to seal between the housing and the housing.

According to this configuration, when the valve body is moved by the drive mechanism, the bag body is moved to the contracted state and the valve body is moved, and the friction between the valve body and the case can be reduced. The required operation force can be reduced and the operability can be improved. Still, after the valve body is moved to the closed position, the fluid is supplied to the bag body to expand the bag body, and the expansion force of the bag body seals between the valve body and the housing. Can be accurately blocked. Further, it is possible to reduce the weight and cost of the entire valve device.

The side view which shows the valve apparatus of 1st Embodiment. Sectional drawing which shows the valve apparatus of a flow path blockage state. Sectional drawing of the AA in FIG. The top view, front view, and side view which show a valve body. Sectional drawing which shows the valve apparatus of a flow path open state. Sectional drawing which shows the valve apparatus of the flow path closed state of 2nd Embodiment. Sectional drawing of BB site|part in FIG. The top view, front view, and side view which show a valve body. Sectional drawing which shows the valve apparatus of a flow path open state. Sectional drawing which shows the modification of the said embodiment. Sectional drawing which shows the modification of the said embodiment.

Hereinafter, an embodiment of the present disclosure will be described with reference to the drawings.

[First Embodiment]
As shown in FIGS. 1 to 5, the valve device of the present embodiment has a housing 2 that communicates with an existing water pipe 1 and forms a part of a flow path. The housing 2 has a branch case 20 which is hermetically fitted to the outside of the water pipe 1 in a state where a predetermined space is formed with respect to the outer peripheral surface of the water pipe 1. The branch case 20 has a split T-shaped tube configuration that is formed by combining a plurality of split bodies 20A, 20B, and 20C while sandwiching the branch case seal portion 20S, and the split bodies are joined together by a fastener made of a bolt and a nut. Connected to each other. A branch pipe portion 21 is connected to the branch case 20 (one divided body 20B). The branch pipe portion 21 constitutes a part of a flow path branched from the water pipe 1.

A cutting device (not shown) is attached to the branch case 20 via a branch pipe portion 21. In FIG. 1, it is connected to the left side of the branch pipe portion 21. After the cutting device forms a perforation in the water pipe 1 surrounded by the branch case 2, it is necessary to remove the cutting device. In order to enable the removal of the cutting device, it is necessary to temporarily close the internal communication between the water pipe 1 and the branch pipe portion 21 that have been drilled. Therefore, the valve device moves the valve body 3 movable between a closed position (see FIG. 2) that closes the flow path and an open position (see FIG. 5) that opens the flow path, and the valve body 3. And a drive mechanism 4 for.

The valve body 3 is made of metal, is provided inside the branch pipe portion 21 as the housing 2, and closes the branch pipe portion 21. The valve body 3 is formed in a disc shape when viewed along the axial direction of the branch pipe portion 21 serving as the flow path r. The valve body 3 moves in the branch pipe portion 21 along a direction orthogonal to the axis (flow path r) of the branch pipe portion 21.

The valve body 3 is formed hollow so as to receive the valve rod 40. On a part of the inner wall of the valve body 3, a valve body side gear portion 4a (female screw) that receives a driving force for moving the valve body 3 is formed. On the outer peripheral surface of the valve rod 40, a housing side gear portion 4b (male screw) that meshes with the valve body side gear portion 4a and transmits the driving force is formed. The upper end of the valve rod 40 is connected to the operation input unit 41. When the operation force by rotation is input to the operation input unit 41, the operation input unit 41 is integrated with the valve rod 40 and rotates along the axis of the valve rod 40. Since the valve rod 40 and the valve body 3 are fitted by the screw structure, the valve body 3 slides up and down. That is, in the present embodiment, the drive mechanism 4 is a mechanical drive mechanism, and is provided on the valve body 3 side and receives the drive force for moving the valve body 3 and the valve body side gear portion 4 a and the housing 2 side. And a housing-side gear portion 4b which is provided and meshes with the valve-side gear portion 4a to transmit the driving force.

A bag body 5 functioning as a sealing material is provided at a portion of the valve body 3 facing the housing 2 (branch pipe portion 21) in the closed position. Further, a bag body passage 6 is provided which allows fluid to be taken in and out of the bag body 5. The operation input unit 41 and the valve rod 40 that form the drive mechanism 4 are hollow. The valve body 3 is also hollow. The bag body conduction path 6 passes through the operation input section 41, the valve rod 40, and the hollow portion of the valve body 3, reaches the hollow lower end of the valve body 3, passes through the inside of the valve body 3, and conducts to the bag body 5. ing.

Examples of the bag body 5 include, but are not limited to, a rubber balloon made of a urethane material having water stopping property. The bag body 5 is provided not on the entire valve body 3 but only on the edge portion facing the housing 2 (branch pipe portion 21). The edge portion means a portion avoiding the central portion of the valve body 3. In the present embodiment, the bag body 5 is provided on the peripheral edges of the side surfaces 3a and 3b (circular surface) of the valve body 3 with respect to the moving direction, and has a ring shape. The branch pipe portion 21 as the housing 2 has a groove portion 2a into which a part of the valve body 3 is inserted. The bag body 5 is arranged on the side surfaces 3a and 3b in the moving direction of the portion inserted into the groove portion 2a of the valve body 3.

The operation of the valve device of the first embodiment will be described.

First, as shown in FIG. 5, with the valve body 3 in the open position, the fluid inside the bag body 5 is drained and the bag body 5 is contracted. Next, the drive mechanism 4 is rotationally driven using a lever, a handle or the like to move the valve body 3 from the open position (FIG. 5) to the closed position (FIG. 2). Next, a fluid is introduced into the bag body 5 through the bag body conduction path 6 and pressure is applied to expand the bag body 5. Both side surfaces 3a and 3b of the valve body 3 are held by the groove 2a by the expansion force of the bag body 5. The fluid to be put in the bag body 5 may be a liquid such as water or oil, or a gas such as air.

As described above, the valve device according to the first embodiment is
A branch pipe portion 21 that is a housing 2 that communicates with the water pipe 1 and constitutes a part of the flow path;
A valve body 3 movable between a closed position that closes the flow path and an open position that opens the flow path,
A drive mechanism 4 for moving the valve body 3,
A bag body 5 provided at a portion of the valve body 3 facing the branch pipe portion 21 which is the housing 2 in the closed position;
A bag body conducting path 6 that allows fluid to be taken in and out of the bag body 5,
After the valve body 3 is moved to the closed position by the drive mechanism 4, the fluid is supplied to the bag body 5 through the bag body conduction path 6 to inflate the valve body 3 and the valve body 3 and the casing by the expansion force of the bag body 5. It is configured to seal between the body 2 and the branch pipe portion 21.

According to this configuration, when the drive mechanism 4 moves the valve body 3, the bag body 5 is contracted to move the valve body 3 and the friction between the valve body 3 and the housing 2 can be reduced. The operating force required when operating the mechanism 4 can be reduced, and the operability can be improved. Still, after the valve body 3 is moved to the closed position, a fluid is supplied to the bag body 5 to inflate the bag body 5, so that the expansion force of the bag body 5 seals between the valve body and the housing. Therefore, the flow path can be appropriately closed. Further, it is possible to reduce the weight and cost of the entire valve device.

In the present embodiment, the bag body 5 is provided not in the entire valve body 3 but only in a portion facing the branch pipe portion 21 which is the housing 2.

As described above, when the bag body 5 is provided only on the edge portion, as compared with the case where the bag body 5 is provided on the entire valve body, the expansive force of the bag body is more likely to concentrate, and the bag body 5 acts for sealing. The power to do increases. Therefore, it becomes possible to improve the waterproof performance.

In the present embodiment, the branch pipe portion 21 that is the housing 2 has the groove portion 2a into which a part of the valve body 3 is inserted, and the bag body 5 is a portion that is inserted into the groove portion 2a of the valve body 3. It is arranged on the side surfaces 3a, 3b with respect to the moving direction, and both side surfaces 3a, 3b of the valve body are held by the groove portion 2a by the expansion force of the bag body 5.

Thus, since both side surfaces 3a and 3b with respect to the moving direction are sandwiched by the groove portion 2a, a sandwiching action is exhibited as compared with a case where only the end surface of the valve body 3 in the traveling direction is sealed. You can Further, since the valve body 3 is sandwiched via the groove 2a, it is difficult to come off and is stable.

In the present embodiment, the drive mechanism 4 is provided on the valve body 3 side and receives the drive force for moving the valve body 3 and the valve body side gear portion 4a and the housing 2 side, and the valve body side gear portion 4a. And a housing-side gear portion 4b that meshes with and transmits a driving force.

[Second Embodiment]
The valve device according to the second embodiment will be described with reference to FIGS. The same members as those in the first embodiment are designated by the same reference numerals and the description thereof will be omitted. In the first embodiment, the drive mechanism 4 that moves the valve body 3 is a mechanical type, but in the second embodiment, the drive mechanism 104 that moves the valve body 103 is a fluid driven type. Therefore, the structure of the valve body 103 is also different from that of the first embodiment.

The drive mechanism 104 has a closed space forming portion 140 that forms a closed space SP on the opposite side of the flow path r with the valve body 103 interposed therebetween, and a conduction port 141 that is electrically connected to the closed space SP. In the present embodiment, the sealed space forming unit 140 is configured to include an outer surface of the valve body 103, an inner surface of the housing 2, and a seal member provided between the housing 2 and the valve body 103.

The valve body 103 has a shape in which a disc shape and a box shape are combined, and a top surface thereof is set as a pressure receiving surface 103c for receiving the pressure of the driving fluid for the valve body 103. The pressure receiving surface 103c is provided with a bag body conduction path 6 and is electrically connected to the bag body 5. That is, the bag body communication path 6 and the closed space SP communicate with each other. In order that the bag body 5 expands after the valve body 103 moves to the closed position, the hole of the bag body conducting path 6 provided in the pressure receiving surface 103c is set to a very small hole with respect to the area of the pressure receiving surface 103c. There is.

The operation of the valve device of the second embodiment will be described.

First, as shown in FIG. 9, the bag body 5 is contracted while the valve body 103 is in the open position. Next, the driving fluid is introduced into the closed space SP through the conduction port 141, and if the pressure in the closed space SP exceeds the pressure in the flow path r, the valve body 103 moves to the closed position due to the pressure of the driving fluid. To do. Further, if the driving fluid is introduced into the closed space SP to increase the pressure in the closed space SP, the bag body 5 expands. Both side surfaces 103a and 103c of the valve body 103 are sealed in the groove 2a by the expansion force of the bag body 5. On the other hand, if the driving fluid is discharged from the closed space SP through the conduction port 141 and the pressure in the closed space SP becomes lower than the pressure in the flow path r, the pressure in the flow path r moves the valve element 103 to the open position. To do. Examples of the driving fluid include liquids such as water and oil, and gases such as air.

As described above, in the valve device of the second embodiment, the branch pipe portion 21 that is the housing 2 that communicates with the water pipe 1 and forms a part of the flow path r, the closed position and the flow path that close the flow path r. A valve body 103 movable between an open position that opens the path r, a drive mechanism 104 for moving the valve body 103, and a branch pipe portion 21 that is the housing 2 of the valve body 103 in the closed position. After the bag body 5 provided at the facing portion and the bag body conduction path 6 that allows the fluid to be taken in and out of the bag body 5, after the valve body 103 is moved to the closed position by the drive mechanism 104, By supplying a fluid to the bag body 5 through the bag body conduction path 6 and inflating the same, the expansion force of the bag body 5 seals between the valve body 103 and the branch pipe portion 21 which is the housing 2. It is configured.

In the second embodiment, the drive mechanism 104 has a closed space forming portion 140 that forms a closed space SP on the opposite side of the flow path r with the valve body 103 interposed therebetween, and a conduction port 141 that is electrically connected to the closed space SP. .. The valve body 103 moves to the closed position by the pressure of the driving fluid introduced into the closed space SP through the conduction port 141, and the driving fluid is extracted from the closed space SP through the conduction port 141, thereby The valve element 103 is configured to move to the open position by the pressure.

In the second embodiment, the bag body communication path 6 and the sealed space SP communicate with each other, and the driving fluid moves the valve body 103 and expands the bag body 5.

According to this configuration, since the fluid required for the movement of the valve body 103 and the expansion of the bag body 5 is used, the configuration can be simplified.

In particular, in the structure in which the valve body is driven by the pressure of the drive fluid, when only the conventional rubber seal member is used, the pressure of the drive fluid required to press the valve body against the casing to stop the water is High and unrealistic. As in the present disclosure, the structure in which the bag body is inflated after the valve body is moved to stop the water is preferable because the pressure of the driving fluid required when the valve body is moved can be suppressed.

[Modification]
For example, in the first and second embodiments, the bag body 5 is provided on both side surfaces 3a and 3b of the valve body, but the present invention is not limited to this. For example, as shown in FIG. 10A, the bag body 5 is provided on one side surface 3a of the both side surfaces 3a and 3b of the valve body 3, and the groove portion 2a is provided on the other side surface 3b of the both side surfaces 3a and 3b of the valve body 3. There may be provided a seal member 5′ that is not a bag body for sealing. Examples of the seal member 5'include an elastic body such as rubber that is not a bag.

According to this configuration, since the bag body 5 is provided only on the one side surface 3a, the bag body 5 is inflated as compared with the case where the bag body 5 is provided from the one side surface 3a to the end surface 3d. It is possible to limit the direction to be performed to one direction and concentrate the expansion force to improve the sealing force.

Further, as shown in FIG. 10A, one side surface 3a of the both side surfaces 3a, 3b on which the bag body 5 is provided is on the side to which the water pipe 1 is connected. According to this configuration, the bag body 5 is provided on the side of the water pipe 1 and the seal member 5'is provided on the opposite side. The valve body 3 is pushed in the direction away from the water pipe 1 by the water pressure of the water pipe 1. Therefore, the water pressure of the water pipe 1 makes it easier for the seal member 5'and the groove 2a to come into contact with each other, so that damage or wrinkles of the bag body 5 due to the movement of the valve body 3 can be avoided, and the stability is increased. In addition, the posture of the valve body 3 is easily stabilized.

Of course, a seal member may be provided on one of the side surfaces 3a, 3b closer to the water pipe 1 and a bag may be provided on the side farther from the water pipe 1.

Further, as shown in FIG. 10B, the bag body 5 may be provided on the end surface 3d of the valve body 3 in the traveling direction. In the example of the figure, the bag body is provided on the end surface 3d and both side surfaces 3a and 3b of the valve body, but the bag body may be provided only on the end surface 3d.

In the second embodiment, the bag body conduction path 6 and the sealed space SP are electrically connected, but the bag body conduction path 6 and the sealed space SP may not be electrically connected and may be independent.

In the first and second embodiments, the valve bodies 3 and 103 are made of metal, but a water blocking sheet may be partially used. Specifically, the valve body may be composed of a metal frame body and a water blocking sheet stretched over the frame body. A urethane material may be used as the waterproof sheet, but other suitable materials may be used. With this configuration, the valve body can be reduced in weight.

Further, in the first and second embodiments, the branch pipe portion 21 is connected by sandwiching the end portion on the split surface of the split body forming the branch case 20, but the present invention is not limited to this. For example, the branch pipe part 21 may be formed in the branch case 20.

The shape of the valve body is a plate shape or a flat shape, but is not limited to this. For example, it may be an arc plate shape that curves along the outer peripheral surface of the water pipe 1.

The valve element blocks the flow path in the branch pipe portion, but is not limited to this as long as it blocks the flow path connected to the water pipe. For example, it is conceivable that an arcuate plate-shaped valve body is arranged between the branch case and the water pipe, and the valve body moves along the circumferential direction or the axial direction of the water pipe 1. Even in such a case, the water stoppage by the bag body described in the first and second embodiments is effective.

DESCRIPTION OF SYMBOLS 1... Water pipe 2... Housing 2a... Groove part 3, 103... Valve body 3a, 3b... Side surface 4, 104... Drive mechanism 140... Sealed space formation part 141... Conducting port 5... Bag body 5'... Seal member 6... Bag Body conduction path r... Flow path SP... Sealed space

Claims (6)

A housing that communicates with the water pipe and constitutes a part of the flow path,
A valve body movable between a closed position that closes the flow passage and an open position that opens the flow passage,
A drive mechanism for moving the valve body,
A bag provided at a portion of the valve body facing the housing in the closed position,
A bag body conduction path that enables fluid to be taken in and out of the bag body;
After the valve body is moved to the closed position by the drive mechanism, a fluid is supplied to the bag body through the bag body conduction path to expand the bag body, so that the expansion force of the bag body causes the valve body to move. It is configured to seal between the housing and
The inside of the bag is not in communication with the flow path,
The drive mechanism has a closed space forming portion that forms a closed space on the opposite side of the flow path with the valve body interposed therebetween, and a conduction port that conducts to the closed space.
The closed space forming portion includes an outer surface of the valve body, an inner surface of the housing, and a seal member provided between the housing and the valve body,
The valve body moves to the closed position by the pressure of the driving fluid introduced into the closed space through the conduction port, and the driving fluid is removed from the closed space through the conduction port, whereby the flow A valve device, wherein the valve element is configured to move to the open position due to pressure in a passage. And through the enclosed space communicating the said bag conductive paths, wherein the driving fluid moves the valve body is configured to inflate the bag body, the valve device according to claim 1. The valve device according to claim 1 or 2 , wherein the bag body is provided only in a portion facing the housing, not in the entire valve body. The housing has a groove into which a part of the valve body is inserted,
The bag body is arranged on a side surface in the moving direction of a portion of the valve body to be inserted into the groove portion, and both side surfaces of the valve body are held in the groove portion by an expansion force of the bag body. The valve apparatus according to any one of Items 1 to 3 . The bag body is provided on one side surface of both side surfaces of the valve body,
The valve device according to claim 4 , wherein a seal member for sealing the groove portion is provided on the other side surface of both side surfaces of the valve body. The valve device according to claim 5 , wherein one side surface of the both side surfaces on which the bag body is provided is on a side to which the water pipe is connected.

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