JP2022029562A - Gate valve device - Google Patents

Abstract

To provide a gate valve device which can attain a high fluid blocking performance and enables a user to grasp a closing operation state intuitively.SOLUTION: A gate valve device includes: a valve body V having an elastic seal member 3 which can adhere to a pipe inner wall surface 1a of a fluid pipe 1 to block a pipe inner passage; and a valve support member 53 which sends the valve body V into the pipe through a through hole 4 formed at a pipe peripheral wall 1A of the fluid pipe 1 and may reciprocate. The valve body V includes: a fluid compression chamber 7 in which a pressure of the fluid increases in conjunction with sending motion of the valve support member 53 in a state that a part of the valve body V contacts with a bottom part of the pipe inner wall surface 1a; and adhesion operation means 8 which causes the elastic seal member 3 to adhere to the pipe inner wall surface 1a in a passage blocking state with fluid having the pressure increased in the fluid compression chamber 7.SELECTED DRAWING: Figure 1

Description

The present invention reciprocates a valve body having an elastic sealing member that is in close contact with the inner wall surface of the fluid tube and can block the flow path in the tube, and the valve body is sent into the tube through a through hole formed in the peripheral wall of the fluid tube. The present invention relates to a sluice valve device provided with a movable valve support member.

As the above-mentioned sluice valve device, there is a shutoff plug shown in Patent Document 1. In this blocking plug, the elastic sealing member of the valve body is composed of a bag-shaped plug body that expands by supplying a filler such as water. A cylindrical body through which a rod-shaped body, which is a valve support member, is movably inserted is provided at the mouth of the plug body, and a supply pipe connected to the pump is screwed and connected to the upper end of the rod-shaped body. There is. The rod-shaped body is formed with a supply path for supplying the filler supplied from the pump via the supply pipe into the plug body. At the lower end of the rod-shaped body, a small diameter portion that can be fitted into the insertion hole formed in the bottom of the fluid tube (tube body) facing the through hole (insertion hole) at the top of the fluid tube is formed. ..
Then, when the filler supplied from the pump via the supply pipe is supplied into the plug body, the plug body expands and comes into close contact with the inner wall surface of the pipe, and the fluid flows out to the downstream side and the through hole (insertion hole). ) Etc. are prevented from leaking, and the flow path in the pipe is blocked.

Japanese Unexamined Patent Publication No. 10-31488

In the above-mentioned shutoff plug, it is necessary to prepare a filler supply facility such as a pump or a supply pipe for supplying a filler such as water into the stopper body. Further, it is conceivable to supply tap water in the existing pipe to the inside of the plug body, but the holding power of the water stop form of the plug body is weak only by the water pressure in the existing pipe, which may lead to poor water stoppage. Furthermore, in the case of a structure in which the tap body filled with tap water is sent into the pipe by rotating the valve stem, the operating torque of the valve stem at the time of the deadline operation is low, so there is no response at the time of the deadline, and the deadline is insufficient or the deadline is excessive. May be invited.

In view of this situation, the main problem of the present invention is that high fluid shutoff performance (water stoppage performance) can be obtained by rational modification using pressurization by feeding the valve support member, and the deadline operation state can be determined. The point is to provide a sluice valve device that can be grasped intuitively.

The first characteristic configuration of the present invention is a valve body having an elastic sealing member that is in close contact with the inner wall surface of the fluid pipe and can block the flow path in the pipe, and a through hole formed in the peripheral wall of the fluid pipe. It is a sluice valve device equipped with a valve support member that can be reciprocated and moved into the pipe.
The valve body includes a fluid pressurizing chamber in which the fluid pressure rises as the valve support member is fed and moved in a state where a part of the valve body is in contact with the bottom of the inner wall surface of the pipe, and the fluid pressurizing chamber. The point is that a contact operating means for causing the elastic sealing member to be in close contact with the inner wall surface of the pipe in a flow path blocking state with the pressure fluid increased in the above is provided.

According to this configuration, a valve body provided with a fluid pressurizing chamber and a close contact operating means is sent into the pipe through a through hole of the fluid pipe, and a part of the valve body is brought into contact with the bottom of the inner wall surface of the pipe. When the valve support member is fed from this contact state, the fluid pressure in the fluid pressurizing chamber of the valve body rises as the valve support member is fed and moved. As a result, the close contact operating means is activated, and the elastic sealing member is brought into close contact with the inner wall surface of the pipe in a flow path blocking state by the pressure fluid rising in the fluid pressurizing chamber.
Therefore, unlike the conventional device, it is not necessary to prepare a pressure fluid supply facility such as a pump or a supply pipe for supplying the pressurized fluid into the valve body, and the fluid shutoff structure (water stop structure) using the pressure fluid is used. It can be simplified. Moreover, the operating torque of the valve support member at the time of deadline increases due to the fluid pressurization in the fluid pressurization chamber accompanying the feeding movement of the valve support member. As a result, it is easy to intuitively grasp the deadline operation state, and the deadline operation can be accurately performed without excess or deficiency.

The second characteristic configuration of the present invention is that the fluid pressurizing chamber is formed with a fluid introduction port for introducing the fluid in the fluid pipe, and the valve support member is moved along the inner surface of the fluid pressurizing chamber. A fluid pressurizing unit is provided that can open and close the fluid introduction port and pressurizes the fluid in the fluid pressurization chamber by moving to the feeding side in a state where the fluid introduction port is closed. Is a constituent member of the elastic seal member, and includes a bag that can be expanded and contracted by supplying and discharging the pressure fluid, and a supply / discharge connection portion that connects the fluid pressurizing chamber and the bag. It is in.

According to this configuration, a valve body provided with a fluid pressurizing chamber and a close contact operating means is sent into the pipe through a through hole of the fluid pipe, and a part of the valve body is brought into contact with the bottom of the inner wall surface of the pipe. In this contact state, the fluid pressurizing portion of the valve support member is in an open state retracted from the fluid introduction port of the fluid pressurization chamber. Therefore, the fluid inlet of the fluid pressurizing chamber communicates with the inside of the fluid pipe, and the pressure fluid in the fluid pipe flows into the fluid pressurizing chamber. This inflowing pressure fluid is supplied into the bag from the supply / discharge connection portion, and the bag expands due to the fluid pressure in the fluid pipe. At this time, the holding power of the fluid blocking form (water blocking form) of the bag is not sufficient.
Further, when the fluid pressurizing portion of the valve support member is moved to the feeding side along the inner surface of the fluid pressurizing chamber, the fluid introduction port is sealed by the fluid pressurizing portion of the valve support member during the movement. The fluid in the fluid pressurizing chamber is pressurized by the movement of the fluid pressurizing portion of the valve support member in a state where the fluid inlet is closed. This pressurized fluid is supplied into the bag from the supply / discharge connection portion, and the bag expands at a higher fluid pressure and strongly adheres to the inner wall surface of the pipe.
Therefore, while using the fluid in the fluid pipe, the bag can be inflated with a high fluid pressure using the fluid pressurization by feeding the valve support member, so that the bag can be reliably and strongly in the fluid shutoff form (water stop form). Can be maintained at.

The third characteristic configuration of the present invention is that the fluid pressurizing chamber is filled with a non-compressible fluid, and the valve support member is fed and moved in a state where the elastic sealing member is in contact with the bottom of the inner wall surface of the pipe. A fluid pressurizing section for pressurizing the fluid in the fluid pressurizing chamber is provided, and the close contact operating means has a pressure receiving surface of the fluid pressure increased in the fluid pressurizing chamber, and the pressure receiving surface has a pressure receiving surface. The point is that the elastic sealing member is provided with a movable piece that is pressed against the side surface portion of the inner wall surface of the pipe in the crossing direction intersecting the feeding direction by the acting fluid pressure.

According to this configuration, the valve body provided with the fluid pressurizing chamber and the movable piece is sent into the pipe through the through hole of the fluid pipe, and the elastic sealing member of the valve body is brought into contact with the bottom of the inner wall surface of the pipe. When the valve support member is sent and moved in this contact state, the incompressible fluid filled in the fluid pressurizing chamber is pressurized by the fluid pressurizing portion of the valve support member. This pressurized fluid pressure acts on the pressure receiving surface of the movable piece, and the movable piece moves apart in the crossing direction with respect to the feeding direction, and the elastic sealing member is strongly pressed against the side surface of the inner wall surface of the pipe.
Therefore, since the movable piece can be pressed and operated with a high fluid pressure using the fluid pressurization by feeding the valve support member, the elastic sealing member can be reliably and strongly maintained in the fluid shutoff form (water stop form). can.

The fourth characteristic configuration of the present invention is that the valve body is provided with a core metal that supports the bag and is joined to the valve support member so as to be relatively movable within a certain range in the feeding direction. The core metal is provided with a pressure chamber forming cylinder portion that forms the fluid pressure chamber in which the fluid pressurizing portion of the valve support member is movable along the feeding direction, and the core metal is provided with the pressure chamber forming cylinder portion. The point is that a communication passage is formed to communicate the fluid introduction port formed in the pressurizing chamber forming cylinder portion and the inside of the fluid pipe.

According to this configuration, a valve body provided with a fluid pressurizing chamber and a close contact operating means is sent into the pipe through a through hole of the fluid pipe, and a part of the valve body is brought into contact with the bottom of the inner wall surface of the pipe. In this contact state, the fluid pressurizing portion of the valve support member is in an open state retracted from the fluid introduction port of the pressurizing chamber forming cylinder portion forming the fluid pressurizing chamber. Therefore, the fluid introduction port of the fluid pressurizing chamber communicates with the inside of the fluid pipe via the communication passage of the core metal, and the pressure fluid in the fluid pipe flows into the fluid pressurizing chamber in the pressurizing chamber forming cylinder portion. This inflowing pressure fluid is supplied into the bag from the supply / discharge connection portion, and the bag expands due to the fluid pressure in the fluid pipe. At this time, the holding power of the fluid blocking form (water blocking form) of the bag is not sufficient.
Further, when the fluid pressurizing portion of the valve support member is moved to the feeding side along the inner surface of the pressurizing chamber forming cylinder portion with respect to the core metal, the fluid introduction port becomes the fluid pressurizing portion of the valve support member during the movement. It is sealed with. The fluid in the fluid pressurizing chamber is pressurized by the movement of the fluid pressurizing portion of the valve support member in a state where the fluid inlet is closed. This pressurized fluid is supplied into the bag from the supply / discharge connection portion, and the bag expands at a higher fluid pressure and strongly adheres to the inner wall surface of the pipe.
Therefore, since the core metal of the valve body is only provided with the pressurizing chamber forming cylinder portion provided with the fluid introduction port and the fluid pressurizing chamber, the valve body structure can be simplified. Moreover, compared to the case where the fluid pressurizing chamber is directly formed on the core metal, the processing of the inner peripheral surface of the pressurizing chamber forming cylinder portion to which the fluid pressurizing portion of the valve support member moves is executed advantageously in terms of cost. be able to.

The fifth characteristic configuration of the present invention is that the close contact operating means intersects the movable piece on which the fluid pressure acts on the pressure receiving surface due to the contact with the valve support member that is sent and moved inside the pipe. The point is that a forced separation moving means for forcibly moving the distance in the direction is provided.

According to this configuration, the valve support member is sent and moved in a state where the elastic seal member of the valve body is in contact with the bottom of the inner wall surface of the pipe, and the incompressible fluid filled in the fluid pressurizing chamber is transferred to the fluid of the valve support member. Pressurize with the pressurizing part. This pressurized fluid pressure acts on the pressure receiving surface of the movable piece, and the movable piece moves apart in the crossing direction with respect to the feeding direction. When the valve support member is further sent and moved from this state, the forced separation moving means is activated by the contact with the valve support member. As a result, a forced separation moving force in the crossing direction is applied to the movable piece. Therefore, the elastic seal member is strongly pressed against the side surface of the inner wall surface of the pipe by the cooperation of the pressurized fluid pressure and the forced separation moving force, and a high fluid shutoff state (water stop state) is maintained.
Therefore, the movable piece can be separated and moved in the crossing direction by the cooperation of the high fluid pressure utilizing the fluid pressurization by feeding the valve support member and the forced separation moving force accompanying the contact with the valve support member. Therefore, the elastic sealing member can be more reliably and strongly maintained in the fluid blocking form (water blocking form). Moreover. By applying fluid pressurization and forced separation movement force by feeding and moving the valve support member, it is easier to grasp the deadline operation state more intuitively, and the deadline operation can be performed accurately without excess or deficiency.

In the sixth characteristic configuration of the present invention, the valve body is provided with a core metal that supports the elastic sealing member and is joined to the valve support member so as to be relatively movable within a certain range in the feeding direction. The core metal has a fluid pressurizing chamber in which the fluid pressurizing portion of the valve support member can move along a feeding direction, and a movable piece having a pressure receiving surface thereof in the fluid pressurizing chamber. The point is that a support portion that is movably supported in the crossing direction while facing the surface is provided.

According to this configuration, the valve body provided with the fluid pressurizing chamber and the movable piece is sent into the pipe through the through hole of the fluid pipe, and the elastic sealing member of the valve body is brought into contact with the bottom of the inner wall surface of the pipe. When the valve support member is sent and moved with respect to the core metal in this contact state, the incompressible fluid filled in the fluid pressure chamber of the core metal is pressurized by the fluid pressure portion of the valve support member. This pressurized fluid pressure acts on the pressure receiving surface of the movable piece supported by the bearing portion of the core metal. The movable piece moves away from the bearing portion of the core metal in the crossing direction, and the elastic sealing member is strongly pressed against the side surface portion of the inner wall surface of the pipe.
Therefore, since the core metal of the valve body is only provided with the fluid pressurizing chamber and the support portion of the movable piece, the elastic sealing member can be reliably and strongly maintained in the fluid blocking form (water blocking form). The structure can be simplified.

The seventh characteristic configuration of the present invention is that the forced separation moving means is movable in a state where it can come into contact with the first inclined portion provided in the fluid pressurizing portion of the valve support member and the first inclined portion. A second inclined portion formed on the piece is provided, and the moving force in the feeding direction of the valve support member is converted into the forced separation moving force of the movable piece by the contact between the first inclined portion and the second inclined portion. The point is that it is configured to be converted.

According to this configuration, the valve support member is sent and moved in a state where the elastic seal member of the valve body is in contact with the bottom of the inner wall surface of the pipe, and the incompressible fluid filled in the fluid pressurizing chamber is transferred to the fluid of the valve support member. Pressurize with the pressurizing part. This pressurized fluid pressure acts on the pressure receiving surface of the movable piece, and the movable piece moves apart in the crossing direction with respect to the feeding direction. In this state, the first inclined portion of the valve support member and the second inclined portion of the movable piece are in a non-contact state. When the valve support member is further fed and moved from this state, the moving force in the feeding direction of the valve support member intersects the movable pieces due to the contact between the first inclined portion of the valve support member and the second inclined portion of the movable piece. It is converted into a forced separation movement force in the direction. Therefore, the elastic seal member is strongly pressed against the side surface of the inner wall surface of the pipe by the cooperation of the pressurized fluid pressure and the forced separation moving force, and a high fluid shutoff state (water stop state) is maintained.
Therefore, since the first inclined portion is provided in the fluid pressure portion of the valve support member and the second inclined portion is provided in the movable piece, the elastic seal member is reliably and strongly maintained in the fluid blocking form (water blocking form). It is possible to simplify the valve body structure that can be used.

Overall sectional view of the sluice valve device of the first embodiment in a state of contact with the bottom of the pipe. Enlarged half-section view of the valve body in front of the pipe bottom Enlarged cross-sectional view of the valve body in the state of hitting the bottom of the pipe Overall sectional view at the time of deadline Enlarged cross-sectional view of the valve body at the time of deadline when viewed from the front Enlarged cross-sectional view of the valve body at the time of deadline Overall sectional view of the sluice valve device of the second embodiment in a state of contact with the bottom of the pipe. Enlarged cross-sectional view of the valve body in the middle of feeding into the pipe in front view Enlarged cross-sectional view of the valve body in front of the pipe bottom Enlarged half-section view of the valve body in front view at the deadline Overall sectional view at the highest position (maximum valve opening operation position) in the sluice valve device of the third embodiment. Enlarged cross-sectional view of the valve body in front of the pipe bottom Enlarged cross-sectional view of the valve body in front view in the first stage of water stoppage during the deadline Enlarged cross-sectional view of the valve body in front view in the second stage water stop state during the deadline Enlarged cross-sectional view of the valve body at the time of deadline when viewed from the front Overall cross-sectional view just before the highest rising position (maximum valve opening operation position)

An embodiment of the present invention will be described with reference to the drawings.
[First Embodiment]
The sluice valve device installed in the water pipe 1 which is an example of a fluid pipe is shown. This sluice valve device has a valve body V having a divided housing 2 attached to the water pipe 1 in a watertight state and an elastic sealing member 3 capable of being in close contact with the inner wall surface 1a of the water pipe 1 and blocking the in-pipe flow path. In the closed valve operating space 20 in the housing 2, the valve body V is sent into the pipe along the vertical direction from the through hole 4 formed in the upper part of the pipe peripheral wall 1A of the water pipe 1 in a continuous water state. It is provided with a valve feeding mechanism 5.

As shown in FIGS. 1 and 2, the diameter of the through hole 4 of the pipe peripheral wall 1A is set to be smaller than the inner diameter of the water pipe 1. As shown in FIGS. 1 to 3, the elastic seal member 3 of the valve body V has a substantially U-shaped pipe circumferential seal portion 3A that can be pressure-contacted with the pipe inner wall surface 1a along the pipe circumferential direction. An annular seal portion 3B having a circular shape in a plan view, which is continuous with both upper ends of the pipe circumferential direction seal portion 3A and can seal the through hole 4, is provided.
As shown in FIG. 2, the width of the crossing direction that intersects (orthogonally) horizontally in the pipe radial direction with respect to the feeding direction in the pipe circumferential direction seal portion 3A is set to a dimension smaller than the diameter of the through hole 4. There is. Further, as shown in FIG. 3, the outer diameter of the annular seal portion 3B is set to a dimension smaller than the diameter of the through hole 4.

As shown in FIG. 1, the housing 2 includes a pair of left and right lower housing members 21 facing each other in the crossing direction, an intermediate housing member 22 forming the lower half side of the valve operating space 20, and a valve operating space 20. It includes an upper housing member 23 forming the upper half side, and a lid member 24 that freely rotates only the operation shaft portion 51A of the valve rod 51 of the valve feeding mechanism 5 so as to project upward.
The pair of lower housing members 21 and the intermediate housing member 22 are equipped with elastic packing 25 that seals between the divided surfaces of the flange portions 21A and 22A facing each other in the pipe circumferential direction and between the outer peripheral surfaces of the water pipe 1. do. The pair of lower housing members 21 and the intermediate housing member 22 are connected by fastening the flange portions 21A and 21A facing each other in the pipe circumferential direction and the flange portions 21A and 22A with bolts and nuts 26, respectively. There is.
The upper flange portion 22B of the intermediate housing member 22 and the lower flange portion 23A of the upper housing member 23 are fastened with bolts 28 in a state of interposing an O-ring 27 that seals between the joint surfaces thereof. .. The upper flange portion 23B of the upper housing member 23 and the lid member 24 are fastened with bolts 30 with an O-ring 29 that seals between the joint surfaces thereof.

As shown in FIG. 1, the lid member 24 has an O-ring 31 that seals between the valve rod 51 and the outer peripheral surface of the operation shaft portion 51A, and a flange portion 51B provided on the operation shaft portion 51A of the valve rod 51. A recess 24A that is rotatably inserted is provided. The outer diameter of the flange portion 51B of the operation shaft portion 51A is set to be larger than the diameter of the shaft insertion hole 23a formed through the upper side wall of the upper housing member 23. Therefore, the flange portion 51B of the operation shaft portion 51A arranged in the recess 24A of the lid member 24 is held in place by contact with the opening peripheral edge of the shaft insertion hole 23a of the upper housing member 23.

As shown in FIGS. 1 to 3, the valve feeding mechanism 5 is screwed into a valve rod 51 that is rotatable around the vertical axis Y passing through the center of the through hole 4 of the water pipe 1 and the valve rod 51. A screw piece 52 and a metal slide spindle 53 which is a valve support member that can move up and down along the valve stem 51 integrally with the screw piece 52 are provided.
In the upper cylinder portion 53A of the slide spindle 53, a top storage portion 54 for storing the screw top 52 in a state where the screw top 52 cannot be rotated relative to the side and a valve rod 51 penetrating the screw top 52 in the top storage portion 54. A shaft moving space 55 having a downward opening to which the lower screw shaft portion 51C moves is formed.

An annular engaging collar 53B is formed on the outer peripheral surface of the upper tubular portion 53A of the slide spindle 53. The engaging flange portion 53B is a movement restricting space 12 between the upper surface 61a of the upper core metal body 61, which will be described later, which constitutes the core metal 6 of the valve body V, and the inner surface of the tubular engaging member 11 fixed to the upper surface 61a. Is located in. The engaging flange portion 53B of the slide spindle 53 supports the load of the valve body V by engaging with the inner surface of the ceiling wall portion 11A of the tubular engaging member 11. The load bearing range is the range from the highest rising position (maximum valve opening operation position) of the valve body V in the valve operating space 20 to the position where the valve body V hits the bottom of the pipe inner wall surface 1a at the moment when the valve body V abuts on the bottom of the pipe inner wall surface 1a. Will be.
The engaging flange portion 53B is separated downward from the inner surface of the ceiling wall portion 11A of the cylindrical engaging member 11 as the slide spindle 53 is fed after the position where the pipe bottom touches. Therefore, the vertical distance between the inner surface of the ceiling wall portion 11A of the tubular engaging member 11 and the upper surface 61a of the core metal 6 is within a certain range in the feeding direction of the slide spindle 53 and the core metal 6 of the valve body V. It is a relative movement range that is configured to be relatively movable. However, in the present embodiment, as shown in FIG. 4, a position slightly deviated from the vertical center position of the relative movement range toward the upper surface 61a side of the core metal 6 is set as the maximum feed position, and this maximum feed position is the deadline operation. It is configured in position.

At both ends of the upper surface 61a of the core metal 6 in the crossing direction, elevating guide portions 57 that are moved and guided along a pair of left and right elevating guide rails 56 formed on the inner surface of the intermediate housing member 22 are integrally formed. ..

As shown in FIGS. 1 to 6, the valve body V of the sluice valve device configured as described above is used to feed and move the slide spindle 53 in a state where a part of the valve body V is in contact with the bottom of the inner wall surface 1a of the pipe. A fluid pressurizing chamber 7 in which the pressure of the fluid rises accordingly, and the elastic sealing member 3 is blocked by the pressure fluid rising in the fluid pressurizing chamber 7 with respect to the inner peripheral surface of the through hole 4 and the inner wall surface 1a of the pipe. The contact actuating means 8 and the contact actuating means 8 are provided.
In this embodiment, the clean water in the water pipe 1 is used as the incompressible fluid supplied in the fluid pressurizing chamber 7. Then, in each of FIGS. 1 to 6, the fluid (clean water) in the fluid pressurizing chamber 7 is displayed as a dot pattern.

Then, as shown in FIG. 1, the valve body V provided with the fluid pressurizing chamber 7 and the close contact operating means 8 is sent into the pipe through the through hole 4 of the water pipe 1, and a part of the valve body V is provided at the bottom of the pipe inner wall surface 1a. To abut. When the slide spindle 53 is fed from this contact state, the fluid pressure in the fluid pressurizing chamber 7 of the valve body V rises as the slide spindle 53 is fed and moved. As a result, the close contact operating means 8 is activated, and the elastic sealing member 3 is brought into close contact with the inner wall surface 1a of the pipe in a flow path blocking state by the pressure fluid rising in the fluid pressurizing chamber 7.
Therefore, unlike the conventional device, it is not necessary to prepare a pressure fluid supply facility such as a pump or a supply pipe for supplying the pressurized fluid into the valve body V, and a fluid shutoff structure (water stop structure) using the pressure fluid is not required. ) Can be simplified. Moreover, the operating torque of the valve rod 51 of the valve feeding mechanism 5 at the time of deadline increases due to the fluid pressurization in the fluid pressurizing chamber 7 accompanying the feeding movement of the slide spindle 53. As a result, it is easy to intuitively grasp the deadline operation state, and the deadline operation can be accurately performed without excess or deficiency.

Next, the valve body V provided with the fluid pressurizing chamber 7 and the close contact operating means 8 will be described in detail.
As shown in FIGS. 1 to 3, the core metal 6 of the valve body V has a hollow structure. Specifically, the pair of core metal side wall portions 62 arranged at intervals in the pipe axis direction and the double core metal side wall portions 62 on the lower surface side of the upper core metal body 61 having the pair of elevating guide portions 59. It is configured by integrally forming a core metal peripheral wall portion 63 that closes between the outer peripheral edges along the pipe circumferential direction. The lower half side of both core metal side wall portions 62 is formed to be curved in a circular shape along the inner wall surface 1a of the pipe in the direction of the pipe axis, and is configured in a parallel posture along the vertical direction in the direction of crossing.

On the outer surface side of the core metal peripheral wall portion 63 between the outer peripheral edges of both core metal side wall portions 62, a substantially U-shaped circumferential seal mounting groove 64 for mounting the pipe circumferential seal portion 3A of the elastic seal member 3 is formed. ing. An annular seal portion 3B of the elastic seal member 3 is mounted between the upper end portion of the both core metal side wall portions 62 and the lower surface of the upper core metal body 61 in a state of communicating with both upper end portions of the circumferential seal mounting groove 64. An annular seal mounting groove 65 is formed.

At the center of the core metal 6 of the valve body V, a cylindrical resin or metal pressure chamber forming cylinder that forms a concentric fluid pressure chamber 7 on the upper and lower axis Y passing through the center of the through hole 4. A section 71 is provided. The upper end portion of the pressurizing chamber forming cylinder portion 71 is fitted and fixed to the upper support cylinder portion 66 formed on the upper core metal body 61. An O-ring 67 is provided on the inner peripheral surface of the upper bearing cylinder portion 66 to seal between the inner peripheral surface and the outer peripheral surface of the upper end portion of the pressure chamber forming cylinder portion 71. The lower end portion of the pressurizing chamber forming cylinder portion 71 is fitted and fixed to the lower support cylinder portion 68 formed at the lower end portions of the both core metal side wall portions 62 and the core metal peripheral wall portion 63. An O-ring 69 is provided on the inner peripheral surface of the lower bearing cylinder portion 68 to seal between the inner peripheral surface and the outer peripheral surface of the lower end portion of the pressure chamber forming cylinder portion 71.

At the lower end of the upper cylinder 53A of the slide spindle 53, a fluid pressurizing surface 72a that is slidable along the inner peripheral surface of the pressurizing chamber forming cylinder 71 and pressurizes the fluid in the fluid pressurizing chamber 7. A bottomed tubular fluid pressurizing portion 72 is integrally formed with the tip side (lower end side). An O-ring 73 is provided on the outer peripheral surface of the fluid pressurizing portion 72 on the distal end side to seal between the inner peripheral surface of the pressurizing chamber forming cylinder portion 71.

The pressurizing chamber forming cylinder portion 71 is formed with a fluid introduction port 74 for introducing tap water in the water pipe 1 which is an example of the fluid. The fluid introduction port 74 has a fluid pressurizing portion 72 in a load-supporting state of the valve body V in which the upper surface of the engaging flange portion 53B of the slide spindle 53 engages with the inner surface of the ceiling wall portion 11A of the tubular engaging member 11. It is arranged at a position near the lower side of the fluid pressure surface 72a. Therefore, the fluid introduction port 74 is configured to be openable and closable by the fluid pressurizing portion 72 that slides along the inner peripheral surface of the pressurizing chamber forming cylinder portion 71. Specifically, as shown in FIGS. 2 and 3, in the load supporting state of the valve body V, the fluid introduction port 74 is in an open state communicating with the fluid pressurizing chamber 7. As shown in FIGS. 5 and 6, the fluid introduction port 74 is sealed by the fluid pressurizing portion 72 as the slide spindle 53 is fed after the position where the pipe bottom touches. The clean water in the fluid pressurizing chamber 7 is pressurized by moving the fluid pressurizing unit 72 to the feeding side in a state where the fluid introduction port 74 is sealed.
A communication passage 75 that communicates the fluid introduction port 74 of the pressurizing chamber forming cylinder 71 with the inside of the water pipe 1 is formed in the both core metal side wall portions 62.

The close contact operating means 8 is an elastic tubular member constituting the tube circumferential direction sealing portion 3A and the annular sealing portion 3B of the elastic sealing member 3, and is a bag 81 that can be expanded and contracted by supplying and discharging a pressure fluid. A supply / discharge connection portion 82 for connecting the fluid pressurizing chamber 7 and the bag 81 is provided. The supply / discharge connection portion 82 has a base insertion hole 83 for inserting the base 81A of the bag 81 into the fluid pressure chamber 7 from the circumferential seal mounting groove 64 at the bottom of the core metal peripheral wall portion 63 facing the fluid pressure chamber 7. Form. The mouthpiece 81A of the bag 81 inserted through the mouthpiece insertion hole 83 is fixed in a sealed state between the bag 81 and the inner peripheral surface of the mouthpiece insertion hole 83.

In the sluice valve device configured as described above, as shown in FIGS. A part of the body V, that is, the arcuate lower end surface 62a of the double core metal side wall portion 62 is brought into contact with the bottom portion of the inner wall surface 1a of the pipe. In this contact state, the fluid pressurizing surface 72a of the fluid pressurizing portion 72 of the slide spindle 53 is in an open state slightly retracted upward from the fluid introduction port 74 of the fluid pressurizing chamber 7. Therefore, the fluid introduction port 74 of the fluid pressurizing chamber 7 communicates with the inside of the water pipe 1 via the communication passage 75 of the double core metal side wall portion 62, and the pressure tap water in the water pipe 1 is the fluid pressurizing chamber 7. It flows in. The inflowing pressure tap water is supplied into the bag 81 from the mouthpiece 81A constituting the supply / discharge connection portion 82, and the bag 81 expands under the pressure of the pressure tap water. At this time, the holding power of the water-stopping form of the bag 81 is not sufficient.
Further, as shown in FIGS. 4 to 6, when the fluid pressurizing portion 72 of the slide spindle 53 is slid to the feeding side along the inner peripheral surface of the pressurizing chamber forming cylinder portion 71, at the initial stage of the sliding. The fluid introduction port 74 is sealed by the fluid pressurizing portion 72 of the slide spindle 53. The clean water in the fluid pressurizing chamber 7 is pressurized by sliding the fluid pressurizing portion 72 of the slide spindle 53 with the fluid introduction port 74 sealed. This pressurized clean water is supplied into the bag 81 from the mouthpiece 81A constituting the supply / discharge connection portion 82, and the bag 81 expands with a higher water pressure and strongly adheres to the inner peripheral surface of the pipe inner wall surface 1a and the through hole 4. do.
Therefore, while using the clean water in the water pipe 1, the bag 81 can be inflated with a high water pressure using the tap water pressurization by the feed of the slide spindle 53, so that the bag 81 can be reliably and strongly stopped. Can be maintained at.

Further, since the core metal 6 of the valve body V is only provided with the pressurizing chamber forming cylinder portion 71 provided with the fluid introduction port 74 and the fluid pressurizing chamber 7, the valve body structure can be simplified. Moreover, compared to the case where the fluid pressurizing chamber 7 is directly formed on the core metal 6, the processing of the inner peripheral surface of the pressurizing chamber forming cylinder portion 71 to which the fluid pressurizing portion 72 of the slide spindle 53 moves is cost effective. It can be done in an advantageous way.

[Second Embodiment]
8 to 10 show a sluice valve device according to another embodiment. In this sluice valve device, the fluid pressurizing chamber 7 formed in the core metal 6 of the valve body V is filled with water, which is an example of an incompressible fluid. Filled water in the fluid pressurizing chamber 7 is added to the metal slide spindle 53, which is a valve support member, as the elastic seal member 3 is fed from the pipe bottom contact position where the elastic seal member 3 abuts on the bottom of the pipe inner wall surface 1a. A fluid pressurizing section 72 for pressing is provided. Further, the close contact operating means 8 has a pressure receiving surface 85b of the pressure water raised in the fluid pressurizing chamber 7, and the elastic sealing member 3 is fed by the receiving pressure in the pipe in the crossing direction intersecting the feeding direction. A pair of movable pieces 85 that are brought into pressure contact with the side surface portion of the wall surface 1a are provided.
Also in this embodiment, the fluid (water) in the fluid pressurizing chamber 7 is displayed as a dot pattern in each of FIGS. 8 to 10.

A valve body V including a pair of movable pieces 85 of the fluid pressurizing chamber 7 and the close contact operating means 8 is sent into the pipe through the through hole 4 of the water pipe 1, and the elastic sealing member 3 of the valve body V is applied to the bottom of the pipe inner wall surface 1a. Get in touch. When the slide spindle 53 is sent and moved in this contact state, the water filled in the fluid pressurizing chamber 7 is pressurized by the fluid pressurizing portion 72 of the slide spindle 53. This pressurized water pressure acts on the pressure receiving surface 85b of the pair of movable pieces 85. As a result, the pair of movable pieces 85 move apart in the crossing direction with respect to the feeding direction, and the elastic sealing member 3 is strongly pressed against the side surface portion of the inner wall surface 1a of the pipe.
Therefore, since the pair of movable pieces 85 can be pressed and operated with a high water pressure utilizing the pressurization of the filling water by feeding the slide spindle 53, the elastic sealing member 3 can be reliably and strongly maintained in the water-stopping form. can. Moreover, the operation torque of the valve rod 51 of the valve feeding mechanism 5 at the time of deadline increases due to the pressurization of the filling water in the fluid pressurizing chamber 7 accompanying the feeding movement of the slide spindle 53. As a result, it is easy to intuitively grasp the deadline operation state, and the deadline operation can be accurately performed without excess or deficiency.

In the first embodiment described above, the housing 2 is configured in a three-divided structure consisting of a pair of left and right lower housing members 21 and an intermediate housing member 22. In the second embodiment, as shown in FIG. 7, the structure is divided into two, a lower housing member 32 that is exteriorized from below the water pipe 1 and an intermediate housing member 33 that is exteriorized from above the water pipe 1. Has been done. The lower housing member 32 and the intermediate housing member 33 are equipped with an elastic packing 34 that seals between the divided surfaces of the flange portions 32A and 33A facing each other in the pipe circumferential direction and the outer peripheral surface of the water pipe 1. The lower housing member 32 and the intermediate housing member 33 are connected by fastening the flange portions 32A and 33A facing each other in the pipe circumferential direction with bolts and nuts 35. The upper flange portion 33B of the intermediate housing member 33 and the lower flange portion 23A of the upper housing member 23 are fastened with bolts 28 in a state of interposing an O-ring 27 that seals between the joint surfaces thereof. ..
The other configuration of the housing 2 is the same as that of the first embodiment described above, and the same number is added to the same configuration location as that of the first embodiment, and the description thereof will be omitted.

Next, the valve body V provided with the fluid pressurizing chamber 7 and the close contact operating means 8 will be described in detail.
At the center of the core metal 6 of the valve body V, there is a circular fluid pressurizing chamber 7 centered on the vertical axis Y passing through the center of the through hole 4, and a diameter larger than the inner diameter of the fluid pressurizing chamber 7. Further, a movement range limiting chamber 76 in which the annular engaging collar portion 53B projecting from the outer peripheral surface of the upper cylinder portion 53A of the slide spindle 53 moves in the vertical direction is continuously formed.
A cylindrical engaging member 77 that can be engaged with the upper surface of the engaging flange portion 53B of the slide spindle 53 is fastened and fixed to the upper surface of the core metal 6. The slide spindle 53 and the core metal 6 are fed in a constant direction between the bottom surface of the tubular engaging member 77 and the stepped surface 76a on the back side in the movement range regulating chamber 76 of the core metal 6 facing the bottom surface in the vertical direction. It is a relative movement range that is configured to be relatively movable within the range.

The engaging flange portion 53B of the slide spindle 53 supports the load of the valve body V by engaging with the bottom surface of the tubular engaging member 77. The load bearing range is the moment when the valve body V abuts on the bottom of the pipe inner wall surface 1a from the highest rising position (maximum valve opening operation position) of the valve body V in the valve operating space 20 as shown in FIG. It is the range up to the position where the pipe bottom hits.
The engaging flange portion 53B moves downward from the bottom surface of the tubular engaging member 77 as the slide spindle 53 is fed after the position where the tube bottom touches. As shown in FIG. 10, the position where the lower surface of the engaging flange portion 53B abuts on the back side step surface 76a in the movement range regulating chamber 76 of the core metal 6 is set as the maximum feed position, and this maximum feed position is the deadline operation. It is configured in position.

A circular seal pressing portion 78 having a diameter larger than the diameter of the through hole 4 is formed so as to project from the upper end portion of the core metal 6. On the upper surface side of both ends of the seal pressing portion 78 in the crossing direction, an elevating guide portion 57 that is moved and guided along a pair of left and right elevating guide rails 56 formed on the inner surface of the intermediate housing member 33 is integrally formed. ing. The outer surface of the core metal 6 is provided with a rubber lining that surrounds the entire circumference of the valve body constituent region below the seal pressing surface 78a of the seal pressing portion 78. This rubber lining functions as the elastic sealing member 3. The elastic seal member 3 is continuously connected to the pipe circumferential seal portion 3A having a substantially U-shape in the pipe axial direction and the both upper ends of the pipe circumferential seal portion 3A which can be pressure-contacted to the pipe inner wall surface 1a along the pipe circumferential direction. In addition, the annular sealing portion 3B having a circular shape in a plan view capable of sealing the through hole 4 is provided as a main configuration.
The lower side surface of the core metal 6 is configured as a pipe bottom seal pressing surface 6a formed in a circular shape along the pipe inner wall surface 1a in the direction of the pipe axis. The pipe bottom seal pressing surface 6a strongly presses the lower portion of the elastic seal member 3 in the pipe circumferential direction seal portion 3A to the bottom side of the pipe inner wall surface 1a as the slide spindle 53 is fed after the pipe bottom contact position. Let it stop the water.

As shown in FIGS. 8 and 9, the width of the crossing direction that intersects (orthogonally) horizontally in the pipe radial direction with respect to the feeding direction in the pipe peripheral direction seal portion 3A is slightly smaller than the diameter of the through hole 4. It is set to the dimension. Further, the outer diameter of the lower seal portion 3Ba of the annular seal portion 3B is set to a dimension slightly smaller than the diameter of the through hole 4, and the lower seal portion 3Ba is continuously stretched outward in a brim shape. The outer diameter of the upper seal portion 3Bb to be put out is set to a size slightly larger than the diameter of the through hole 4.
Therefore, at the pipe bottom contact position shown in FIG. 9, the stepped portion between the lower seal portion 3Ba and the upper seal portion 3Bb of the annular seal portion 3B comes into contact with the inner peripheral surface and the outer peripheral surface side opening peripheral edge of the through hole 4. At the deadline operation position shown in FIG. 10, the seal pressing surface 78a of the seal pressing portion 78 presses the upper surface of the annular seal portion 3B as the slide spindle 53 is fed after the pipe bottom contact position. As a result, the annular seal portion 3B elastically deforms outward in the radial direction and strongly adheres to the inner peripheral surface of the through hole 4 and the outer peripheral surface side opening peripheral edge.

As shown in FIGS. 7 to 10, the lower end of the upper cylindrical portion 53A of the slide spindle 53 is slidable along the inner peripheral surface of the fluid pressurizing chamber 7 and is inside the fluid pressurizing chamber 7. A bottomed tubular fluid pressurizing portion 72 having a fluid pressurizing surface 72a for pressurizing the fluid on the tip end side (lower end side) is integrally formed. An O-ring 79 is provided on the upper side of the inner peripheral surface of the fluid pressurizing chamber 7 to seal between the inner peripheral surface and the outer peripheral surface of the fluid pressurizing portion 72.

As shown in FIGS. 7 to 10, each of the two movable pieces 85 of the close contact operating means 8 has a seal pressing head 85A provided with an arcuate seal pressing surface 85a along the pipe circumferential direction of the pipe inner wall surface 1a, and the seal. A shaft-shaped sliding support portion 85B projecting from or near the center of the back surface of the pressing head 85A is provided.
The sliding support portions 85B of each movable piece 85 intersect at both sides of the core metal 6 in the crossing direction that horizontally passes through the pipe axis X at the position corresponding to the lower part of the fluid pressurizing chamber 7 and at the position where the pipe bottom touches. A sliding guide hole 86 as a support portion slidably inserted and supported along a direction and a head storage recess 87 for accommodating a seal pressing head 85A of each movable piece 85 are formed in communication with each other. The end surface of the sliding support portion 85B of the movable piece 85 facing the fluid pressurizing chamber 7 is configured as a pressure receiving surface 85b on which the pressure of the filled water in the fluid pressurizing chamber 7 acts.
An O-ring 88 is provided on the inner peripheral surface of each sliding guide hole 86 in the core metal 6 to seal between the movable piece 85 and the outer peripheral surface of the sliding support portion 85B.

The seal pressing surface 85a of the movable piece 85 inserted through each sliding guide hole 86 comes into contact with the inner surface of the tube circumferential direction seal portion 3A of the elastic seal member 3. Therefore, the seal pressing head 85A of each movable piece 85 is returned to the initial position and urged by the elastic restoring force of the pipe peripheral direction sealing portion 3A. In the initial position, the back surface of the seal pressing head 85A is in contact with the bottom surface of the head accommodating recess 87 of the core metal 6, and the seal pressing head 85A is in a state of being retired into the head accommodating recess 87.

[Third Embodiment]
The sluice valve device shown in FIGS. 11 to 16 shows an improved structure of the above-mentioned second embodiment. In the third embodiment, the close contact operating means 8 is forced into a pair of movable pieces 85 in which fluid pressure is acting on the pressure receiving surface 85b by abutting with the slide spindle 53 that is sent and moved inside the pipe in the crossing direction. A forced separation moving means 9 for moving the separation is provided.
In the present embodiment, the fluid pressurizing chamber 7 formed in the core metal 6 of the valve body V is filled with water, which is an example of an incompressible fluid. A pressurizing chamber fluid circulation means that circulates this filled water with the pressure tap water in the water pipe 1 when the valve body V is in the range from the highest rising position (maximum valve opening operation position) to the pipe bottom contact position is provided. Has been done.
Further, also in this embodiment, the fluid (clean water) in the fluid pressurizing chamber 7 is displayed as a dot pattern in each of FIGS. 11 to 16.

As shown in FIGS. 11 to 15, each of the two movable pieces 85 of the close contact operating means 8 has a seal pressing head 85A provided with an arcuate seal pressing surface 85a along the pipe circumferential direction of the pipe inner wall surface 1a, and the seal. A plate-shaped sliding support portion 85B projecting from the back surface of the pressing head 85A is provided.
The sliding support portions 85B of each movable piece 85 intersect at the lower portion of the fluid pressurizing chamber 7 in the core metal 6 and at both side portions in the crossing direction horizontally passing through the pipe axis X at the position where the pipe bottom touches. A sliding guide hole 86 is formed as a support portion that is slidably inserted and supported along the direction.
The seal pressing surface 85a of the movable piece 85 inserted through each sliding guide hole 86 comes into contact with the inner surface of the tube circumferential direction seal portion 3A of the elastic seal member 3. Therefore, the seal pressing head 85A of each movable piece 85 is returned to the initial position and urged by the elastic restoring force of the pipe peripheral direction sealing portion 3A. In the initial position, the back surface of the seal pressing head 85A abuts on the opening peripheral edge of the sliding guide hole 86 on the outer surface of the core metal 6.

The end surface of the sliding support portion 85B of the movable piece 85 facing the fluid pressurizing chamber 7 is configured as a pressure receiving surface 85b on which the pressure of the filled water in the fluid pressurizing chamber 7 acts. Further, the end portion of the sliding support portion 85B of both movable pieces 85 is arranged so as to enter into the recess 72b formed in the lower portion of the fluid pressurizing portion 72 of the slide spindle 53.
A first inclined portion 91 of the forced separation moving means 9 is formed on each of the portions of the inner surface of the recess 72b of the fluid pressurizing portion 72 facing the end surface of the sliding support portion 85B of each movable piece 85. .. Each of the left and right first inclined portions 91 is configured as an obliquely downward inclined surface located downward toward the upper and lower axis Y side passing through the center of the fluid pressurizing portion 72.
A second inclined portion 92 of the forced separation moving means 9 capable of contacting the first inclined portion 91 of the fluid pressurizing portion 72 is formed on the end surface of the sliding support portion 85B of each movable piece 85. Each of the left and right second inclined portions 92 is configured as an obliquely upward inclined surface located downward toward the upper and lower axis Y side passing through the center of the fluid pressurizing portion 72. The inclined surface of the second inclined portion 92 also functions as a pressure receiving surface 85b.
Then, the moving force in the feeding direction of the slide spindle 53 is caused by the contact between both first inclined portions 91 of the fluid pressurizing portion 72 of the slide spindle 53 and the second inclined portion 92 of the sliding support portion 85B of each movable piece 85. Is converted into the forced separation moving force of both movable pieces 85.

As shown in FIGS. 11 and 12, seal mounting grooves 77a are formed on the inner peripheral surface of the tubular engaging member 77 fastened and fixed to the upper surface of the core metal 6 at predetermined intervals in the vertical direction. There is. Each seal mounting groove 77a is fitted with an O-ring 80 that seals between the slide spindle 53 and the outer peripheral surface of the upper cylinder portion 53A.
In a state where the upper surface of the engaging flange 53B of the slide spindle 53 is engaged with the bottom surface of the tubular engaging member 77, both are on the outer peripheral surface of the upper tubular portion 53A corresponding to the arrangement area of both O-rings 80. An annular groove portion 53a that is not in contact with the O-ring 80 is formed.

Then, as shown in FIGS. 11 and 12, when the valve body V is in the range from the highest rising position (maximum valve opening operation position) to the pipe bottom contact position, the upper surface of the engaging flange portion 53B of the slide spindle 53 is formed. Engage with the bottom surface of the tubular engaging member 77. In this engaged state, as shown in FIG. 12, both O-rings 80 of the tubular engaging member 77 are arranged in a non-contact state in the annular groove portion 53a of the upper cylindrical portion 53A of the slide spindle 53, and both O-rings. The water stop function of 80 is in a lost state. Further, the upper opening 53c of the internal space 53b of the annular groove portion 53a is formed to communicate with the in-pipe flow path of the water pipe 1. The lower opening 53d of the internal space 53b of the annular groove portion 53a is formed to communicate with the fluid pressurizing chamber 7 via the communication groove 53e formed in the engaging flange portion 53B of the slide spindle 53.

Then, the communication formed in the annular groove portion 53a of the upper tubular portion 53A of the slide spindle 53, the internal space 53b of the annular groove portion 53a provided with the upper opening 53c and the lower opening 53d, and the engaging flange portion 53B of the slide spindle 53. When the valve body V is in the range from the highest rising position (maximum valve opening operation position) to the pipe bottom contact position with the groove 53e, the filled water in the fluid pressurizing chamber 7 is used as the pressure tap water in the water pipe 1. A pressurizing chamber fluid circulation means for circulation is configured.

By the above-mentioned pressurizing chamber fluid circulation means, the pressure tap water in the water pipe 1 flows into the fluid pressurizing chamber 7 of the core metal 6, and the filled water in the fluid pressurizing chamber 7 rises in the pressure in the water pipe 1. Circulates with water. As a result, the filled water in the fluid pressurizing chamber 7 is replaced with new tap water, so that if the valve body V bursts, the filled water in the fluid pressurizing chamber 7 may flow out into the pipe. , There is no problem with the quality of tap water.

As shown in FIGS. 11 and 12, when the upper surface of the engaging flange portion 53B of the slide spindle 53 is engaged with the bottom surface of the tubular engaging member 77, both first inclined portions of the fluid pressurizing portion 72 are engaged. There is a gap between the 91 and the facing surface of each movable piece 85 with the second inclined portion 92. Therefore, even if the valve body V is sent from the highest rising position to the pipe bottom contact position, the forced separation moving means 9 is in a non-operating state.

FIG. 12 shows the pipe bottom contact position at the moment when the pipe circumferential seal portion 3A of the valve body V abuts on the bottom portion of the pipe inner wall surface 1a. When the slide spindle 53 is fed from the pipe bottom contact position, as shown in FIG. 13, the outer peripheral surface portion on the upper side of the annular groove portion 53a in the upper cylinder portion 53A compresses the upper O-ring 80 into a watertight state. This is the first stage of water stoppage. Even in this first stage of water stop state, there is a gap between the facing surfaces of both first inclined portions 91 of the fluid pressurizing portion 72 and the second inclined portion 92 of each movable piece 85, and the forced separation moving means 9 is provided. It is maintained in a non-operating state.
The filled water in the fluid pressurizing chamber 7 is pressurized by the fluid pressurizing surface 72a of the fluid pressurizing section 72 as the slide spindle 53 is fed from the pipe bottom contact position to the first stage water stop state. This pressurized water pressure acts on the pressure receiving surface 85b of the pair of movable pieces 85.

As shown in FIG. 14, the slide spindle 53 is fed from the water stop state of the first stage, and the outer peripheral surface portion on the upper side of the annular groove portion 53a in the upper cylinder portion 53A compresses the lower O-ring 80 into a watertight state. .. This is the second stage of water stoppage. In this second stage of water stop state, both first inclined portions 91 of the fluid pressurizing portion 72 and the second inclined portion 92 of each movable piece 85 come into contact with each other. However, since no pressing force is applied from both first inclined portions 91 of the fluid pressurizing portion 72 to the second inclined portion 92 of each movable piece 85, the forced separation moving means 9 is maintained in a non-operating state.
With the feeding of the slide spindle 53 from the water stop state of the first stage to the water stop state of the second stage, the filled water in the fluid pressurizing chamber 7 is further pressurized by the fluid pressurizing surface 72a of the fluid pressurizing section 72. Will be done. This pressurized water pressure acts on the pressure receiving surface 85b of the pair of movable pieces 85. As a result, the pair of movable pieces 85 move apart from each other in the crossing direction with respect to the feeding direction, and the seal pressing surface 85a of each movable piece 85 causes the pipe circumferential sealing portion 3A of the elastic sealing member 3 to be on the side surface side of the pipe inner wall surface 1a. Press on.

As shown in FIG. 15, when the slide spindle 53 is further fed from the contact state at the moment when both first inclined portions 91 of the fluid pressurizing portion 72 and the second inclined portion 92 of each movable piece 85 come into contact with each other. The filled water in the fluid pressurizing chamber 7 is further pressurized by the fluid pressurizing surface 72a of the fluid pressurizing section 72. At the same time, the second inclined portion 92 of each movable piece 85 is pressed by both first inclined portions 91 of the fluid pressurizing portion 72. Due to this pressing and the pressurized water pressure, the movable pieces 85 move apart in the crossing direction, and the sealing portion 3A of the elastic sealing member 3 in the pipe circumferential direction is placed on the side surface side of the pipe inner wall surface 1a on the sealing pressing surface 85a of each movable piece 85. Press strongly on.

Therefore, the pipe circumferential sealing portion 3A of the elastic sealing member 3 is attached to the side surface portion of the pipe inner wall surface 1a in cooperation with the water pressure pressurized in the fluid pressurizing chamber 7 and the forced separation moving force by the forced separation moving means 9. It is strongly pressure-welded and a high water stop state (fluid cutoff state) is maintained.
Therefore, since the first inclined portion 91 is provided in the fluid pressurizing portion 72 of the slide spindle 53 and the second inclined portion 92 is provided in the pair of movable pieces 85, the elastic seal member 3 is kept in a highly watertight state (fluid cutoff). It is also possible to simplify the valve body structure that can be reliably and strongly maintained in the state).

As shown in FIG. 11, when the valve body V is opened to the maximum rising position (maximum valve opening operation position), the slide spindle 53 normally returns to the set maximum rising position with respect to the core metal 6. There is. In this set maximum ascending position, both O-rings 80 of the tubular engaging member 77 on the core metal 6 side are located in the annular groove portion 53a of the upper tubular portion 53A of the slide spindle 53 in a non-contact state. However, as shown in FIG. 16, it is conceivable that the slide spindle 53 may not return to the set maximum rising position with respect to the core metal 6. In this case, the circulation function between the filled water in the fluid pressurizing chamber 7 and the pressure tap water in the water pipe 1 is blocked.

Therefore, in the present embodiment, as shown in FIG. 16, the slide spindle 53 is set with respect to the core metal 6 and returns to the maximum rising position before the valve body V reaches the maximum rising position (maximum valve opening operation position). There is a return means to make it. This returning means is provided on the upper housing member 23 of the housing 2 immediately before the valve body V reaches the maximum rising position (maximum valve opening operation position) on the upper end surface 57a of both elevating guide portions 57 of the core metal 6. It is configured to extend upward from the vertical direction to a position where it can come into contact with the inner surface 23d of the shoulder wall portion 23D.
Then, the slide spindle 53 is set to the maximum rising position with respect to the core metal 6 by the contact between the upper end surface 57a of both the elevating guide portions 57 of the core metal 6 and the inner surface 23d of the shoulder wall portion 23D in the upper housing member 23. It is configured to be restored.
Since the other configurations are the same as the configurations described in the first embodiment or the second embodiment, the same number as that of the first embodiment or the second embodiment is added to the same configuration location. The explanation of it is omitted.

[Another Embodiment]
(1) In the above-mentioned first embodiment, the cylindrical pressure chamber forming cylinder portion 71 for forming the fluid pressure chamber 7 is provided at the center of the core metal 6 of the valve body V. The fluid pressurizing chamber 7 may be directly formed in the central portion.

(2) In the above-mentioned first embodiment, the tube peripheral direction sealing portion 3A and the annular sealing portion 3B of the elastic sealing member 3 are composed of a bag 81 that can be expanded and contracted by supplying and discharging a pressure fluid. However, when the annular seal portion 3B is composed of the rubber lining provided on the valve body V, only the pipe circumferential seal portion 3A is expanded and contracted from the bag 81 that can be expanded and contracted by supplying and discharging the pressure fluid. It may be configured.

(3) In each of the above-described embodiments, the water pipe 1 for transporting tap water, which is an example of a fluid, is exemplified as the fluid pipe, but it is a fluid pipe for transporting other fluids such as industrial water and gas. You may.

1 Fluid pipe (water pipe)
1A Pipe peripheral wall 1a Pipe inner wall surface 3 Elastic seal member 4 Through hole 6 Core metal 7 Fluid pressurizing chamber 8 Adhesion operating means 9 Forced separation moving means 53 Valve support member (slide spindle)
71 Pressurizing chamber forming cylinder 72 Fluid pressurizing part 74 Fluid introduction port 75 Continuous passage 81 Bag 82 Supply / discharge connection part 85 Movable piece 85b Pressure receiving surface 86 Support part (sliding guide hole)
91 1st inclined part 92 2nd inclined part V valve body

Claims (7)

A valve body having an elastic sealing member that is in close contact with the inner wall surface of the fluid pipe and can block the flow path in the pipe, and a reciprocating movable valve that sends the valve body into the pipe through a through hole formed in the peripheral wall of the fluid pipe. A sluice valve device provided with a support member,
The valve body includes a fluid pressurizing chamber in which the fluid pressure rises as the valve support member is fed and moved in a state where a part of the valve body is in contact with the bottom of the inner wall surface of the pipe, and the fluid pressurizing chamber. A sluice valve device provided with a contact actuating means for closely operating the elastic seal member with respect to the inner wall surface of the pipe in a flow path cutoff state with the pressure fluid increased in. The fluid pressurizing chamber is formed with a fluid introduction port for introducing the fluid in the fluid pipe, and the valve support member can open and close the fluid introduction port by moving along the inner surface of the fluid pressurizing chamber. In addition, a fluid pressurizing unit that pressurizes the fluid in the fluid pressurizing chamber by moving the fluid inlet to the feeding side in a sealed state is provided, and the close contact operating means is a constituent member of the elastic sealing member. The sluice valve device according to claim 1, further comprising a bag that can be expanded and contracted by supplying and discharging the pressure fluid, and a supply / discharge connection portion that connects the fluid pressurizing chamber and the bag. The fluid pressurizing chamber is filled with a non-compressible fluid, and the valve support member is fed into the valve support member in a state where the elastic sealing member is in contact with the bottom of the inner wall surface of the pipe. A fluid pressurizing portion for pressurizing the fluid is provided, and the close contact operating means has a pressure receiving surface of the fluid pressure increased in the fluid pressurizing chamber, and the elastic sealing member is provided with the fluid pressure acting on the pressure receiving surface. The sluice valve device according to claim 1, further comprising a movable piece for pressure contacting the side surface portion of the inner wall surface of the pipe in the crossing direction intersecting the feeding direction. The valve body is provided with a core metal that supports the bag and is joined to the valve support member so as to be relatively movable within a certain range in the feeding direction, and the core metal is provided with the valve support. A pressurizing chamber forming cylinder portion is provided to form the fluid pressurizing chamber in which the fluid pressurizing portion of the member is movable along the feeding direction, and the core metal is formed in the pressurizing chamber forming cylinder portion. The sluice valve device according to claim 2, wherein a communication passage connecting the fluid introduction port and the inside of the fluid pipe is formed. The close contact operating means is forced to forcibly move the movable piece on which the fluid pressure is acting on the pressure receiving surface in the crossing direction by abutting with the valve support member that is sent and moved inside the pipe. The sluice valve device according to claim 3, further comprising a separation moving means. The valve body is provided with a core metal that supports the elastic sealing member and is joined to the valve support member so as to be relatively movable within a certain range in the feeding direction. The fluid pressurizing chamber of the valve support member is movable along the feeding direction, and the movable piece is movable in the crossing direction with the pressure receiving surface of the movable piece facing the fluid pressurizing chamber. The sluice valve device according to claim 3 or 5, wherein the support portion is provided. The forced separation moving means includes a first inclined portion provided in the fluid pressurizing portion of the valve support member, and a second inclined portion formed on the movable piece so as to be in contact with the first inclined portion. 5. The configuration is such that the moving force in the feeding direction of the valve support member is converted into the forced separation moving force of the movable piece by the contact between the first inclined portion and the second inclined portion. The sluice valve device described.

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