JP2022052014A - Gate valve device - Google Patents

Abstract

To prevent an elastic seal member from being expanded outside in a crossing direction in the middle of inserting a valve body into a pipe.SOLUTION: The present invention relates to a gate valve device comprising: a valve body V including an elastic seal member 3 capable of shutting an intra-pipe passage while being adhered to an intra-pipe wall surface 1a of a fluid pipe 1; and a reciprocally movable valve support member 53 which feeds the valve body V from a through hole 4 formed on a pipe peripheral wall 1A of the fluid pipe 1 into the pipe. The valve body V includes press-contact actuation means 6 which brings the elastic seal member 3 into press-contact with a side face part of the intra-pipe wall surface 1a in a crossing direction across a feeding direction only with press-contact reaction force which is generated by the feeding of the valve support member 53 in a state where a bottom face of the elastic seal member 3 is abutted to a bottom part of the intra-pipe wall surface 1a.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 sluice valve device shown in Patent Document 1. In this partition valve device, a pair of slide spindles (valve support members) having a seal pressing surface capable of pressing the inner surface of the elastic sealing member outward from the direction intersecting the feeding direction at the intermediate portion in the elastic sealing member. Movable pieces are provided. A diagonally downward first inclined surface is formed on both side portions in the crossing direction in the middle portion of the slide spindle facing the upper half side portion of the shaft portion of the pair of movable pieces, which is located downward toward the axis core side of the slide spindle. ing. An obliquely upward second inclined surface that can come into contact with the first inclined surface of the slide spindle is formed on the upper half side portion of the shaft portion of the pair of movable pieces.

Then, as the slide spindle is fed in a state where the bottom surface of the elastic sealing member is in contact with the bottom of the inner wall surface of the pipe, both first inclined surfaces of the slide spindle are in contact with the second inclined surface of the pair of movable pieces and pressed. do. By this pressing, the pair of movable pieces move outward in the crossing direction, and the elastic sealing member is pressed against the inner wall surface of the pipe in a flow path blocking state by the sealing pressing surface of the pair of movable pieces.

Japanese Patent No. 3662897

In the above-mentioned sluice valve device, the center line of the through hole formed in the peripheral wall of the fluid pipe and the feed shaft core of the slide spindle may be slightly misaligned. If the valve body is fed into the through hole of the pipe peripheral wall in this misaligned state, the peripheral surface of the elastic sealing member of the valve body may be caught on the peripheral edge of the through hole during the insertion of the through hole. When the slide spindle is further fed in this hooked state, both first inclined surfaces of the slide spindle come into contact with the second inclined surfaces of the pair of movable pieces and press the elastic seal member by the seal pressing surface of the pair of movable pieces. Is expanded to the outside in the crossing direction, and there is an inconvenience that the feeding is stopped in a state where the valve body is caught on the peripheral edge of the through hole.

In view of this situation, a main object of the present invention is to provide a sluice valve device capable of preventing the elastic seal member from expanding outward in the crossing direction during insertion of the valve body into the pipe.

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 elastic seal member is sent to the valve body in the feeding direction only by the pressure contact reaction force generated by the feeding of the valve support member in a state where the bottom surface of the elastic seal member is in contact with the bottom of the inner wall surface of the pipe. On the other hand, there is a point that a pressure contact operating means for pressure contacting with the side surface portion of the inner wall surface of the pipe in the intersecting direction is provided.

According to this configuration, the pressure contact operating means for pressing the elastic seal member against the side surface portion of the inner wall surface of the pipe in the crossing direction is to feed the valve support member in a state where the bottom surface of the elastic seal member is in contact with the bottom portion of the inner wall surface of the pipe. It operates only by pressure contact reaction force by force. Therefore, the center line of the through hole formed in the peripheral wall of the fluid tube and the feed axis of the valve support member are slightly misaligned, and when the valve body is inserted into the tube through the through hole, it is elastic during the insertion. Even if a part of the outer peripheral surface of the seal member is caught on the peripheral edge of the through hole, the pressure contact operating means does not operate because the pressure contact reaction force is not generated on the bottom side of the elastic seal member.
Therefore, it is possible to reliably prevent the feeding stop of the valve body due to the expansion of the elastic seal member outward in the crossing direction during the insertion of the valve body into the pipe.

The second characteristic configuration of the present invention is that the pressure contact operating means is arranged on the bottom side in the elastic seal member and can move relative to the end of the valve support member within a certain range in the feeding direction. A pair of movable pieces that are movably supported by pressing the inner surface of the elastic seal member outward from the crossing direction at an intermediate portion in the elastic seal member of the valve support member. With the forced separation moving portion that moves the pair of movable pieces outward in the crossing direction by moving the first core material and the pair of movable pieces in relative proximity to each other due to the pressure contact reaction force. , Is provided.

According to this configuration, due to the feeding of the valve support member in a state where the bottom surface of the elastic sealing member is in contact with the bottom of the inner wall surface of the pipe, a pressure contact reaction force is applied to the first core material arranged on the bottom side in the elastic sealing member. It works. Due to this pressure contact reaction force, the first core material and the pair of movable pieces move relatively close to each other to operate the forced separation moving portion, and the pair of movable pieces are separated and moved outward in the crossing direction. As a result, the elastic seal member is pressed against the side surface of the inner wall surface of the pipe in the crossing direction in a flow path blocking state.
Therefore, by rational improvement only by arranging the first core material on the bottom side in the elastic seal member, the valve body is fed due to the expansion of the elastic seal member to the outside in the crossing direction during the insertion of the valve body into the pipe. It is possible to prevent the crowd from stopping.

The third characteristic configuration of the present invention is that the pressure contact operating means is arranged on the bottom side in the elastic sealing member and can move relative to the end of the valve support member within a certain range in the feeding direction. A second core material arranged in the above, and a pair of pressing link mechanisms erected so as to flex and swing in the crossing direction over the valve support member and the second core material are provided, and the pair of the pressing links are provided. The mechanism is provided with a seal pressing portion that presses the inner surface of the elastic seal member outward from the crossing direction as the valve support member and the second core member move in close proximity to each other due to the pressure contact reaction force. In the valve support member, due to the elastic restoring force of the elastic seal member, the seal pressing portion is moved outward in the crossing direction from the connection position with respect to the valve support member and the second core material. The point is that a link posture holding portion for contacting and holding in the protruding initial bending posture is provided.

According to this configuration, due to the feeding of the valve support member in a state where the bottom surface of the elastic sealing member is in contact with the bottom of the inner wall surface of the pipe, a pressure contact reaction force is applied to the second core material arranged on the bottom side in the elastic sealing member. It works. Due to this pressure contact reaction force, the valve support member and the second core material move in close proximity. Due to this proximity movement, the pair of pressing link mechanisms erected over the valve support member and the second core member bends and swings outward in the crossing direction, and the elastic seal is formed by the seal pressing portion of the pair of pressing link mechanisms. The inner surface of the member is pressed outward from the crossing direction. As a result, the elastic seal member is pressed against the side surface of the inner wall surface of the pipe in the crossing direction in a flow path blocking state.
Therefore, by rational improvement only by arranging the second core material on the bottom side in the elastic seal member, the valve body is fed due to the expansion of the elastic seal member to the outside in the crossing direction during the insertion of the valve body into the pipe. It is possible to prevent the crowd from stopping.

Moreover, when the valve opening operation of the valve body returns from the deadline state in which the elastic seal member is pressed against the inner wall surface of the pipe to the state where the bottom surface of the elastic seal member is in contact with the inner wall surface of the pipe in a non-pressure contact state, a pair The pressing link mechanism returns and swings due to the elastic restoring force of the elastic sealing member. At this time, the link posture holding portion provided on the valve support member causes the pair of pressing link mechanisms to be initially bent so that the seal pressing portion projects outward in the crossing direction from the connection position with respect to the valve support member and the second core material. Since it can be held in contact with the posture, it is possible to reliably perform bending and swinging of the pair of pressing link mechanisms when a pressure contact reaction force acts on the bottom side of the elastic sealing member.

The fourth characteristic configuration of the present invention is that the pressure contact actuating means includes an elastic pressure contact body fixed to the valve support member in a substantially U-shaped initial form in the elastic seal member, and the elastic pressure contact body. Is elastically deformed into a circular pressing form along the circumferential direction of the inner wall surface of the pipe by the pressure contact reaction force to form a seal pressing surface that presses the inner surface of the elastic sealing member outward from the crossing direction. The elastic pressure contact body is formed by being bent in advance in the circular pressing form, and is held in the initial form having a substantially U shape by the elastic restoring force of the elastic sealing member.

According to this configuration, the valve support member is fed in a state where the bottom surface of the elastic seal member is in contact with the bottom of the inner wall surface of the pipe, so that the valve is supported in a substantially U-shaped initial form along the inner peripheral surface of the elastic seal member. A pressure contact reaction force acts on the bottom of the elastic pressure contact body fixed to the member. Due to this pressure contact reaction force, the elastic pressure contact body is elastically deformed from a substantially U-shaped initial form to a circular pressing form. The inner surface of the elastic seal member is pressed outward in the crossing direction by the seal pressing surface of the elastic pressure contact body. As a result, the elastic seal member is pressed against the side surface of the inner wall surface of the pipe in the crossing direction in a flow path blocking state.
Therefore, by making a rational improvement only by arranging the elastic pressure contact body in the initial form having a substantially U shape along the inner peripheral surface of the elastic seal member, the outer side of the elastic seal member in the crossing direction during the insertion of the valve body into the pipe. It is possible to prevent the feeding stop of the valve body due to the expansion to.

Moreover, since the elastic pressure-welded body is formed by bending in advance into a circular pressing form and is held in a substantially U-shaped initial form by the elastic restoring force of the elastic sealing member, the elastic pressure-welding body due to the pressure-contact reaction force. Elastic deformation to the circular pressing form can be performed reliably and smoothly.

The fifth characteristic configuration of the present invention is that a first elastic return mechanism for elastically returning and energizing a pair of the movable pieces to an initial position on the inner side in the crossing direction is provided.

According to this configuration, with the valve opening operation of the valve body, the deadline state in which the elastic seal member is pressed against the inner wall surface of the pipe is restored to the state where the bottom surface of the elastic seal member is in contact with the inner wall surface of the pipe in a non-pressure contact state. And, by the cooperation of the elastic restoring force of the elastic sealing member and the returning force of the first elastic return mechanism, the pair of movable pieces can be quickly returned to the initial position on the inner side in the crossing direction. As a result, the valve opening operation of the valve body passing through the through hole of the fluid pipe can be quickly executed.

The sixth characteristic configuration of the present invention is a circle substantially along the circumferential direction of the inner wall surface of the pipe when the seal pressing portion of the pair of pressing link mechanisms projects outward in the crossing direction by the pressure contact reaction force. The point is that an arc-shaped seal pressing surface is provided.

According to this configuration, when the pair of pressing link mechanisms are bent and swung outward in the crossing direction due to the pressure contact reaction force, the seal pressing surface of the seal pressing portion of the pressing link mechanism substantially follows the circumferential direction of the inner wall surface of the pipe. Since the shape changes in an arc shape, a wide range of the elastic sealing member can be appropriately pressed against the side surface of the inner wall surface of the pipe in the crossing direction in a flow path blocking state.

In the seventh characteristic configuration of the present invention, the elastic pressure contact body is elastically urged back to a substantially U-shaped initial form between the bottom portion of the elastic pressure contact body and the end portion of the valve support member. The point is that a second elastic return mechanism is provided.

According to this configuration, with the valve opening operation of the valve body, the deadline state in which the elastic seal member is pressed against the inner wall surface of the pipe is restored to the state where the bottom surface of the elastic seal member is in contact with the inner wall surface of the pipe in a non-pressure contact state. And, by the cooperation of the elastic restoring force of the elastic sealing member and the returning force of the second elastic return mechanism, the elastic pressure contact body can be quickly returned to the substantially U-shaped initial form. As a result, the valve opening operation of the valve body passing through the through hole of the fluid pipe can be quickly executed.

Overall sectional view showing the sluice valve device of the first embodiment in a state of being in contact with the bottom of the pipe. Overall cross-sectional view of the valve body in the state of hitting the bottom of the pipe Overall cross-sectional view of the valve body when the deadline is viewed from the front Enlarged sectional view of a main part showing another embodiment of the first embodiment Overall sectional view showing the sluice valve device of the second embodiment in a state of being in contact with the bottom of the pipe. Cross-sectional view of the valve body in the state of hitting the bottom of the pipe Cross-sectional view of the valve body in the state of hitting the bottom of the pipe in front view Top view of the valve body Enlarged cross-sectional view of the valve body at the time of deadline when viewed from the front Enlarged sectional view of the front view showing the sluice valve device of the third embodiment in a state of being in contact with the bottom of the pipe. Enlarged cross-sectional view of the valve body in the state of hitting the bottom of the pipe Enlarged cross-sectional view of the valve body at the time of deadline when viewed from the front Enlarged view of elastic pressure welder Enlarged sectional view of the valve body in front view showing another embodiment of the third embodiment. Enlarged cross-sectional view of the valve body at the time of deadline when viewed from the front

An embodiment of the present invention will be described with reference to the drawings.
[First Embodiment]
1 to 3 show a sluice valve device installed in a water pipe 1 which is an example of a fluid pipe. 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 in 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 FIG. 1, 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 FIG. 1, the housing 2 has a pair of left and right lower housing members 21 that intersect (orthogonally) horizontally in the pipe radial direction with respect to the feeding direction of the valve body V and face each other in the crossing direction, and the valve operates. The intermediate housing member 22 forming the lower half side of the space 20, the upper housing member 23 forming the upper half side of the valve operating space 20, and the operation shaft portion 51A of the valve rod 51 of the valve feeding mechanism 5 are moved upward. It is provided with a lid member 24 that can freely rotate only in a protruding state.
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 can rotatably enter 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 movement space 55 in which the lower screw shaft portion 51C moves is formed.

The elevating range of the valve body V by the valve feeding mechanism 5 is from the maximum rising position (maximum valve opening operation position) in the valve operating space 20 to the elastic seal member 3 of the valve body V as shown in FIG. The range is up to the maximum descending position (maximum valve closing operation position) crimped to the inner wall surface 1a of the pipe 1 and the inner peripheral surface of the through hole 4 in a flow path blocking state (water stop state). This maximum descending position is set to the deadline position (deadline state). Further, the position at the moment when the elastic seal member 3 of the valve body V, which is closed from the maximum ascending position to the maximum descending position, comes into contact with the bottom of the inner wall surface 1a of the water pipe 1 in a non-pressure contact state is the pipe bottom contact position ( It is set to the state of hitting the bottom of the pipe).

As shown in FIG. 1, a circular seal pressing portion 53B having a diameter larger than the diameter of the through hole 4 is integrally formed in the vertical intermediate portion of the slide spindle 53. On the upper surface side of both ends of the seal pressing portion 53B 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 22 is integrally formed. ing. The outer surface of the lower tubular portion 53C of the slide spindle 53 is provided with a rubber lining that surrounds the entire circumference of the elastic seal constituent region below the seal pressing surface 53b of the seal pressing portion 53B. This rubber lining functions as the elastic sealing member 3.
The elastic seal member 3 is continuous with the pipe circumferential seal portion 3A having a substantially U-shape in the pipe axial direction and the upper end portion of the pipe circumferential seal portion 3A which can be pressure-contacted with the pipe inner wall surface 1a along the pipe circumferential direction. Further, 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.

As shown in FIG. 1, the width of the pipe circumferential sealing portion 3A in the crossing direction is set to a dimension slightly smaller than the diameter of the through hole 4. 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. The outer diameter of the upper seal portion 3Bb that continuously projects outward from the lower seal portion 3Ba in a brim shape is set to a size slightly larger than the diameter of the through hole 4.

Therefore, as shown in FIG. 1, at the position of contact with the bottom of the pipe at the moment when the elastic seal member 3 of the valve body V abuts on the bottom of the inner wall surface 1a of the pipe, the lower seal portion 3Ba and the upper seal portion of the annular seal portion 3B The step portion with 3Bb is located above the through hole 4. At the deadline operation position shown in FIG. 3, the stepped portion between the lower seal portion 3Ba and the upper seal portion 3Bb of the annular seal portion 3B is inside the through hole 4 as the slide spindle 53 is fed after the pipe bottom contact position. It contacts the peripheral surface and the peripheral edge of the opening on the outer peripheral surface side. With the subsequent feeding of the slide spindle 53, the seal pressing surface 53b of the seal pressing portion 53B presses the upper surface of the annular seal portion 3B. As a result, the annular seal portion 3B elastically deforms outward in the radial direction and strongly adheres to the inner peripheral surface and the outer peripheral surface side opening peripheral edge of the through hole 4 in a watertight state.

As shown in FIGS. 1 to 3, the slide spindle 53 is fed into the valve body V of the sluice valve device configured as described above in a state where the bottom surface of the elastic sealing member 3 is in contact with the bottom portion of the inner wall surface 1a of the pipe. A pressure contact operating means 6 for pressing the elastic sealing member 3 against the side surface portion of the inner wall surface 1a of the pipe in the crossing direction is provided only by the pressure contact reaction force generated in association with the above.

Then, as shown in FIGS. 1 and 3, the pressure contact operating means 6 for pressing the elastic sealing member 3 against the side surface portion of the pipe inner wall surface 1a in the intersecting direction with respect to the feeding direction is after the pipe bottom contact position. It operates only by the pressure contact reaction force generated by the feeding of the slide spindle 53. Therefore, the center line of the through hole 4 formed in the pipe peripheral wall 1A of the water pipe 1 and the feed shaft core (upper and lower shaft core Y) of the slide spindle 53 are slightly displaced from each other, and the valve body V is moved from the through hole 4. When inserting into a pipe, even if a part of the outer peripheral surface of the elastic seal member 3 is caught on the peripheral edge of the through hole 4 during the insertion, a pressure contact reaction force is not generated on the bottom side of the elastic seal member 3, so that the pressure contact operating means 6 does not work.
Therefore, it is possible to reliably prevent the feeding stop of the valve body V due to the expansion of the elastic seal member 3 outward in the crossing direction during the insertion of the valve body V into the pipe.

Next, the pressure welding operating means 6 will be described in detail.
As shown in FIGS. 1 to 3, the pressure contact operating means 6 is arranged on the bottom side in the elastic sealing member 3 and can move within a certain range in the feeding direction with respect to the end portion of the slide spindle 53. A pair of metal members that are movably supported by pressing the inner surface of the elastic seal member 3 outward from the crossing direction at an intermediate portion between the first metal core material 60 and the elastic seal member 3 in the slide spindle 53. The movable piece 61 and the first core material 60 and the pair of movable pieces 61 move in relative proximity to each other due to the pressure contact reaction force and come into contact with each other, forcing the pair of movable pieces 61 to move apart from each other in the crossing direction. A separation moving portion 62 and a first elastic return mechanism 63 for elastically returning and energizing a pair of movable pieces 61 to an initial position (standby position) on the inner side in the crossing direction are provided.

As shown in FIGS. 1 and 3, the first core material 60 is slidably guided in the feeding direction (upper and lower axis Y direction) along the inner peripheral surface of the lower cylinder portion 53C of the slide spindle 53. It includes a shaft portion 60A and a disk-shaped reaction force receiving portion 60B integrally formed so as to project horizontally from the lower end of the sliding shaft portion 60A.
A pair of first inclined surfaces 62a of the forced separation moving portion 62 are formed on both side portions of the upper end portion of the sliding shaft portion 60A in the intersecting direction. Each of the pair of first inclined surfaces 62a is configured as an obliquely upward inclined surface located upward toward the feed shaft core (upper and lower shaft core Y) side of the slide spindle 53.
Further, at the central portion of the upper end portion of the sliding shaft portion 60A in the crossing direction, a contact capable of contacting the upper guide wall portion 53D of the slide spindle 53 forming the sliding guide hole 64 of the movable piece 61, which will be described later, from below. The surface 60a is formed. The position where the contact surface 60a of the sliding shaft portion 60A abuts on the upper guide wall portion 53D of the slide spindle 53 is the forced separation moving portion 62 in which the pair of movable pieces 61 are most separated and moved outward in the crossing direction. It is set to the maximum separation movement position (maximum extrusion position) of.

As shown in FIGS. 1 and 3, each of the pair of movable pieces 61 is provided with a seal pressing head 61A having an arc-shaped seal pressing surface 61a and projecting from the center of or near the center of the back surface of the seal pressing head 61A. The shaft-shaped sliding support portion 61B is provided. The diameter of the seal pressing head 61A is configured to be larger than the diameter of the sliding support portion 61B. Therefore, of the back surface of the seal pressing head 61A, the annular back surface portion protruding outward from the outer peripheral surface of the sliding support portion 61B is a slide spindle at the initial position where the movable piece 61 returns to the inward side in the crossing direction. It is configured on the stopper surface 61C that abuts on the outer surface of the 53 in the intersecting direction.

As a support portion that slidably inserts and supports the sliding support portion 61B of each movable piece 61 along the crossing direction at both side portions in the crossing direction horizontally passing through the pipe axis X at the deadline position in the slide spindle 53. A sliding guide hole 64 is formed.
As shown in FIGS. 1 and 3, at the end of the sliding support portion 61B of each movable piece 61, a forced separation moving portion capable of abutting with each first inclined surface 62a of the first core material 60 from the vertical direction. The second inclined surface 62b of 62 is formed. Each of the second inclined surfaces 62b is configured as an obliquely downward inclined surface located upward toward the feed shaft core (upper and lower shaft core Y) side of the slide spindle 53.

When the first core material 60 moves upward with respect to the slide spindle 53 due to the pressure contact reaction force, both first inclined surfaces 62a of the first core material 60 become the second inclined surfaces of the sliding support portion 61B of each movable piece 61. It abuts and presses against 62b, and the upward proximity movement force of the first core material 60 is converted into the forced separation movement force of the movable piece 61.

Then, the pressure contact reaction force generated by the feeding of the slide spindle 53 after the pipe bottom contact position acts on the reaction force receiving portion 60B of the first core material 60 arranged on the bottom side in the elastic sealing member 3. The first core material 60 moves closer to the slide spindle 53 upward due to the pressure contact reaction force. Both first inclined surfaces 62a of the first core material 60 moving upward are in contact with and pressed against the second inclined surface 62b of the sliding support portion 61B of each movable piece 61, and the pair of movable pieces 61 are in the crossing direction. It is moved away to the outside. The upward movement of the first core material 60 is stopped when the contact surface 60a formed on the upper end portion of the sliding shaft portion 60A of the first core material 60 comes into contact with the upper guide wall portion 53D of the slide spindle 53. .. This stop position is the maximum separation movement position in which the pair of movable pieces 61 are most separated and moved outward in the crossing direction, and the elastic seal member 3 is in a flow path blocking state with respect to the side surface portion of the pipe inner wall surface 1a in the crossing direction. It is pressed against (water stop state).
Therefore, due to the rational improvement only by arranging the first core member 60 on the bottom side in the elastic seal member 3, the elastic seal member 3 expands outward in the crossing direction during the insertion of the valve body V into the pipe. It is possible to reliably prevent the feeding stop of the valve body V.

The first elastic return mechanism 63 is composed of a spring plate 63A made of spring steel, which is attached to the outer surface of the slide spindle 53 in the crossing direction in a state of applying a return force to the seal pressing surface 61a of each movable piece 61. ing. The spring plate 63A includes an arc-shaped fitting plate portion 63a into which the seal pressing surface 61a of the movable piece 61 fits from the crossing direction, and mounting plate portions 63b continuous on both upper and lower sides of the arc-shaped fitting plate portion 63a.
The spring plate 63A bends and deforms as the movable piece 61 in the initial position moves to the maximum distance moving position (maximum extrusion position). The elastic restoring force of the flexed and deformed spring plate 63A becomes the returning force.

Then, with the valve opening operation of the valve body V, from the deadline position where the elastic seal member 3 is pressed against the inner wall surface 1a of the pipe to the position where the bottom surface of the elastic seal member 3 comes into contact with the inner wall surface 1a of the pipe in a non-pressure contact state. When returning, the pair of movable pieces 61 can be quickly returned to the initial position on the inner side in the crossing direction by the cooperation of the elastic restoring force of the elastic sealing member 3 and the returning force of the spring plate 63A. As a result, the valve opening operation of the valve body V passing through the through hole 4 of the water pipe 1 can be quickly executed.

[Another Example of the First Embodiment]
FIG. 4 shows another embodiment of the first elastic return mechanism 63. In this other embodiment, the first elastic return mechanism 63 is composed of the rubber material 63B stretched over the sliding support portion 61B of the pair of movable pieces 61. The rubber material 63B is elastically stretched with the movement of the movable piece 61 in the initial position to the maximum separation movement position (maximum extrusion position). The elastic restoring force of the stretched rubber material 63B becomes the return force.

Then, with the valve opening operation of the valve body V, from the deadline position where the elastic seal member 3 is pressed against the inner wall surface 1a of the pipe to the position where the bottom surface of the elastic seal member 3 comes into contact with the inner wall surface 1a of the pipe in a non-pressure contact state. When returning, the pair of movable pieces 61 can be quickly returned to the initial position on the inner side in the crossing direction by the cooperation of the elastic restoring force of the elastic sealing member 3 and the returning force of the rubber material 63B. As a result, the valve opening operation of the valve body V passing through the through hole 4 of the water pipe 1 can be quickly executed.

[Second Embodiment]
5 to 9 show the sluice valve device of another embodiment. In this sluice valve device, a metal slide spindle 70, which is a valve support member, is vertically divided into two parts. That is, the slide spindle 70 is composed of a split upper spindle 71 having a frame accommodating portion 54 and a split lower spindle 72 having a pair of elevating guide portions 57. The split lower spindle 72 includes a large-diameter tubular body 72A in which a pair of elevating guide portions 57 are integrally formed, an annular bottom plate portion 72B integrally formed at the lower end of the large-diameter tubular body 72A, and the annular bottom plate. A small-diameter tubular body 72C extending integrally downward from the inner peripheral edge of the portion 72B is provided. At the opening of the large-diameter tubular body 72A, a fitting support portion 72a is formed in which the connecting flange portion 71A formed at the lower end of the split upper spindle 71 is placed and supported in the fitted state. The connecting flange portion 71A of the split upper spindle 71 mounted and supported on the fitting support portion 72a in a fitted state is fixed to the large-diameter tubular body 72A of the split lower spindle 72 by a bolt 73.
The configuration of the housing 2 is the same as that of the first embodiment described above, and the same number as that of the first embodiment is added to the same configuration portion, and the description thereof will be omitted.

As shown in FIGS. 5 and 6, the lower surfaces of the large-diameter tubular body 72A and the annular bottom plate portion 72B of the split lower spindle 72 are configured on the seal pressing surface 72b. The outer surface of the split lower spindle 72 is provided with a rubber lining that surrounds the entire circumference of the elastic seal constituent area below the seal pressing surface 72b. 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.

As shown in FIGS. 5 to 7 and 9, the elastic seal member 3 is elastically sealed only by the pressure contact reaction force generated by the feeding of the slide spindle 70 in a state where the bottom surface of the elastic seal member 3 is in contact with the bottom portion of the inner wall surface 1a of the pipe. A pressure contact operating means 6 for pressing the member 3 against the side surface portion of the pipe inner wall surface 1a in the crossing direction intersecting the feeding direction is provided.
In the pressure contact operating means 6, a second core is arranged on the bottom side in the elastic seal member 3 and is arranged so as to be relatively movable within a certain range in the feeding direction with respect to the end portion of the split lower spindle 72. The material 75 is provided with a pair of pressing link mechanisms 80 that are erected so as to be flexibly swingable in the intersecting direction over the split lower spindle 72 and the second core material 75.

The second core material 75 is a tubular second sliding shaft portion 75A that is slidably guided in the feeding direction (upper and lower shaft core Y direction) along the inner peripheral surface of the small diameter tubular body 72C of the split lower spindle 72. And an annular second reaction force receiving portion 75B integrally formed in a state of projecting horizontally from the lower end of the second sliding shaft portion 75A. An O-ring 76 is provided on the inner peripheral surface of the small-diameter cylindrical body 72C to seal between the inner peripheral surface and the outer peripheral surface of the second sliding shaft portion 75A.

Each of the pair of pressing link mechanisms 80 includes an upper link 81 and a lower link 82, as shown in FIGS. 5-7 and 9. The upper end of the upper link 81 is swingably pivoted by a first pivot pin 84 on the upper mounting piece 83 provided at the inner corner of the lower surface of the large-diameter cylindrical body 72A and the outer peripheral surface of the small-diameter tubular body 72C. It is worn. The lower end of the lower link 82 is swingably pivotally attached to the lower mounting piece 85 provided on the upper surface of the second reaction force receiving portion 75B of the second core material 75 by the second pivot pin 86. The lower end of the upper link 81 and the upper end of the lower link 82 are pivotally connected by a third pivot pin 87 so as to be flexible.
The third pivot pin 87 is arranged on or near the horizon passing through the tube axis X in the deadline state shown in FIG.

The outer side surface 81a in the crossing direction of the upper link 81 is formed on the arc-shaped upper seal pressing surface 88a that contacts the inner surface of the elastic seal member 3. The outer side surface 82a in the crossing direction of the lower link 82 is formed on the arc-shaped lower seal pressing surface 88b that contacts the inner surface of the elastic seal member 3. The seal pressing portion 88 is composed of an upper seal pressing surface 88a which is a side surface 81a of the upper link 81 and a lower seal pressing surface 88b which is a side surface 82a of the lower link 82. The seal pressing portion 88 presses the inner surface of the elastic seal member 3 outward from the crossing direction as the split lower spindle 72 and the second core member 75 move in close proximity to each other due to the pressure contact reaction force.
The upper seal pressing surface 88a and the lower seal pressing surface 88b of the seal pressing portion 88 are formed in an arc shape substantially along the circumferential direction of the inner wall surface 1a of the pipe in a deadline state in which the upper seal pressing surface 88a and the lower seal pressing surface 88b project outward in the crossing direction due to the pressure contact reaction force. Has been done.

As shown in FIGS. 7 and 9, the split lower spindle 72 seals the pressing link mechanism 80 from the connection position with respect to the split lower spindle 72 and the second core material 75 by the elastic restoring force of the elastic sealing member 3. A link posture holding portion 89 for contacting and holding the pressing portion 88 in the initial bending posture in which the pressing portion 88 projects outward in the crossing direction is provided.
The link posture holding portion 89 has an upper posture restricting surface 89a that abuts on the inner side surface 81b in the crossing direction of the upper link 81 and a lower side that abuts on the inner side surface 82b in the crossing direction of the lower link 82. A posture control surface 89b is formed. When the inner side surface 81b of the upper link 81 and the inner side surface 82b of the lower link 82 abut on the upper posture regulating surface 89a and the lower posture regulating surface 89b, the third pivot pin 87 is first. It is restricted to the initial bending posture that protrudes outward in the crossing direction from the pivot pin 84 and the second pivot pin 86.

Then, the pressure contact reaction force generated by the feeding of the slide spindle 70 after the pipe bottom contact position acts on the second reaction force receiving portion 75B of the second core material 75 arranged on the bottom side in the elastic sealing member 3. do. The second core material 75 moves upward with respect to the slide spindle 70 due to the pressure contact reaction force. Due to the proximity movement of the second core material 75 and the split lower spindle 72 of the slide spindle 70, the pair of pressing link mechanisms 80 erected over the split lower spindle 72 and the second core material 75 are in the crossing direction. It bends and swings outward, and the inner surface of the elastic seal member 3 is pressed outward from the crossing direction by the seal pressing portion 88 of the pair of pressing link mechanisms 80. As a result, the elastic seal member 3 is pressed against the side surface portion of the inner wall surface 1a of the pipe in the crossing direction in a flow path blocking state (water stop state).
Therefore, due to the rational improvement only by arranging the second core member 75 on the bottom side in the elastic seal member 3, the elastic seal member 3 expands outward in the crossing direction during the insertion of the valve body V into the pipe. It is possible to prevent the feeding stop of the valve body V.

Moreover, with the valve opening operation of the valve body V, the deadline state in which the elastic seal member 3 is pressed against the inner wall surface 1a of the pipe is changed to the state where the bottom surface of the elastic seal member 3 is in contact with the inner wall surface 1a of the pipe in a non-pressure contact state. When returning, the pair of pressing link mechanisms 80 return and swing due to the elastic restoring force of the elastic sealing member 3. At this time, the pair of pressing link mechanisms 80 are provided by the link posture holding portion 89 provided on the slide spindle 70, and the seal pressing portion 88 is on the outer side in the crossing direction from the connection position with respect to the split lower spindle 72 and the second core material 75. Since it can be held in contact with the initial bending posture valve projecting to the spindle, the pair of pressing link mechanisms 80 can be reliably bent and swung when a pressure contact reaction force acts on the bottom side of the elastic seal member 3.

Further, in the deadline state in which the pair of pressing link mechanisms 80 are bent and swung outward in the crossing direction due to the pressure contact reaction force, the upper seal pressing surface 88a and the lower seal pressing surface 88b of the seal pressing portion 88 are the inner wall surface 1a of the pipe. Since the shape changes in an arc shape substantially along the circumferential direction of, the wide range of the elastic seal member 3 can be appropriately pressed against the side surface portion of the inner wall surface 1a of the pipe in the crossing direction in a flow path blocking state (water stop state). can.

[Third Embodiment]
10 to 14 show a sluice valve device of another embodiment. In this sluice valve device, a circular seal pressing portion 53B having a diameter larger than the diameter of the through hole 4 of the water pipe 1 is integrally formed in the vertical intermediate portion of the slide spindle 53 which is a valve support member. The outer surface of the slide spindle 53 is provided with a rubber lining that surrounds the entire circumference of the valve body constituent area below the seal pressing surface 53b of the seal pressing portion 53B. 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.
In each drawing of the present embodiment, the housing 2, the valve rod 51 of the valve feeding mechanism 5, and the screw piece 52 are shown in a state of being omitted.

As shown in FIGS. 10 to 12, the elastic seal member 3 is provided only by the pressure contact reaction force generated by the feeding of the slide spindle 53 in a state where the bottom surface of the elastic seal member 3 is in contact with the bottom portion of the inner wall surface 1a of the pipe. A pressure contact operating means 6 for pressure contact with the side surface portion of the pipe inner wall surface 1a in the crossing direction intersecting the feeding direction is provided.
The pressure contact operating means 6 includes an elastic pressure contact body 91 that is embedded in the elastic seal member 3 in a substantially U-shaped initial form along the outer peripheral surface of the elastic seal member 3 and is fixed to the slide spindle 53. The elastic pressure contact body 91 is composed of a strip-shaped body made of spring steel, and both ends thereof are fixed to side surfaces 53a on both sides in the crossing direction of the slide spindle 53 with bolts 92.
The elastic pressure contact body 91 is elastically deformed into a circular pressing form along the circumferential direction of the inner wall surface 1a of the pipe by the pressure contact reaction force, thereby pressing the inner surface of the elastic seal member 3 outward from the difference direction. 91a is formed. The elastic pressure contact body 91 is formed by bending in advance into a circular pressing form, and is held in a substantially U-shaped initial form by the elastic restoring force of the elastic sealing member 3.

Then, as shown in FIGS. 10 and 12, the pressure contact reaction force generated by the feeding of the slide spindle 53 after the pipe bottom contact position acts on the bottom of the elastic pressure contact body 91 arranged in the elastic seal member 3. .. Due to this pressure contact reaction force, the elastic pressure contact body 91 is elastically deformed from a substantially U-shaped initial form to a circular pressing form. The inner surface of the elastic seal member 3 is pressed outward in the crossing direction by the seal pressing surface 91a of the elastic pressure contact body 91. As a result, the elastic seal member 3 is pressed against the side surface portion of the inner wall surface 1a of the pipe in the crossing direction in a flow path blocking state (water stop state).
Therefore, by making a rational improvement only by arranging the elastic pressure contact body 91 in the initial form having a substantially U shape in the elastic seal member 3, the elastic seal member 3 is outward in the crossing direction during the insertion of the valve body V into the pipe. It is possible to prevent the feeding stop of the valve body V due to the expansion of the valve body V.

Moreover, as shown in FIG. 13, the elastic pressure contact body 91 is formed by being bent in advance in a circular pressing form, and as shown in FIG. 10, the elastic restoring force of the elastic sealing member 3 causes a substantially U-shape. Since it is held in the initial form, the elastic deformation of the elastic pressure contact body 91 into the circular pressing form due to the pressure contact reaction force can be reliably and smoothly executed.

[Another Example of the Third Embodiment]
14 and 15 show another embodiment of the pressure welding operating means 6. In this other embodiment, a second elastic return mechanism that elastically pushes the elastic pressure contact body 91 back into a substantially U-shaped initial form between the bottom portion of the elastic pressure contact body 91 and the lower end portion of the slide spindle 53. 93 is provided. The second elastic return mechanism 93 is composed of a coil spring 93A. The coil spring 93A is compressed and deformed as the slide spindle 53 is fed after the tube bottom contact position. The elastic restoring force of the compression-deformed coil spring 93A becomes the return force.

Then, with the valve opening operation of the valve body V, the elastic seal member 3 is in contact with the inner wall surface 1a of the pipe from the deadline state, and the bottom surface of the elastic seal member 3 is in contact with the inner wall surface 1a of the pipe in a non-pressure contact state. When returning, the elastic pressure contact body 91 is quickly returned to the substantially U-shaped initial form by the cooperation of the elastic restoring force of the elastic sealing member 3 and the returning force of the coil spring 93A constituting the second elastic return mechanism 93. be able to. As a result, the valve opening operation of the valve body V passing through the through hole 4 of the water pipe 1 can be quickly executed.

[Other embodiments]
(1) In the above-mentioned third embodiment, the elastic pressure contact body 91 may be made of spring steel, and the elastic pressure contact body 91 may be made of resin.

(2) 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.

V valve body 1 Fluid pipe (water pipe)
1A Pipe peripheral wall 1a Pipe inner wall surface 3 Elastic seal member 4 Through hole 6 Pressure welding actuating means 53 Valve support member (slide spindle)
60 1st core material 61 Movable piece 62 Forced separation moving part 63 1st elastic return mechanism 70 Valve support member (slide spindle)
75 2nd core material 80 Pressing link mechanism 88 Seal pressing part 88a Seal pressing surface (upper seal pressing surface)
88b Seal pressing surface (lower seal pressing surface)
89 Link posture holding part 91 Elastic pressure contact body 91a Seal pressing surface 93 Second elastic return mechanism

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 elastic seal member is sent to the valve body in the feeding direction only by the pressure contact reaction force generated by the feeding of the valve support member in a state where the bottom surface of the elastic seal member is in contact with the bottom of the inner wall surface of the pipe. A sluice valve device provided with a pressure contact actuating means for pressure contacting with a side surface portion of the inner wall surface of the pipe in an intersecting direction. The pressure contact operating means includes a first core material that is arranged on the bottom side of the elastic seal member and can move relative to the end of the valve support member within a certain range in the feeding direction, and the valve. A pair of movable pieces that are movably supported by pressing the inner surface of the elastic seal member outward from the crossing direction at an intermediate portion in the elastic seal member of the support member, and the first core by the pressure contact reaction force. Claim 1 is provided with a forced separation moving portion that causes the pair of movable pieces to move apart and move outward in the crossing direction when the material and the pair of movable pieces move in relative proximity to each other and come into contact with each other. The sluice valve device described. The pressure contact operating means includes a second core material that is arranged on the bottom side of the elastic seal member and is relatively movable within a certain range in the feeding direction with respect to the end of the valve support member. A pair of pressing link mechanisms erected so as to flex and swing in the crossing direction over the valve support member and the second core material are provided, and the pair of pressing link mechanisms are subjected to the pressure contact reaction force. A seal pressing portion that presses the inner surface of the elastic seal member outward from the crossing direction is provided as the valve support member moves closer to the second core member, and the valve support member has the elasticity. Due to the elastic restoring force of the seal member, the pressure link mechanism is held in contact with the valve support member and the second core material in an initial bending posture in which the seal pressing portion protrudes outward in the crossing direction from the connection position with respect to the valve support member and the second core material. The sluice valve device according to claim 1, wherein the link posture holding portion is provided. The pressure contact operating means includes an elastic pressure contact body fixed to the valve support member in a substantially U-shaped initial form in the elastic seal member, and the elastic pressure contact body is provided in the pipe by the pressure contact reaction force. By elastically deforming into a circular pressing form along the circumferential direction of the wall surface, a sealing pressing surface that presses the inner surface of the elastic sealing member outward from the crossing direction is formed, and the elastic pressure contact body has a circular shape. The sluice valve device according to claim 1, wherein the sluice valve device is previously bent and formed in the pressing form of the above, and is held in the initial form having a substantially U shape by the elastic restoring force of the elastic sealing member. The sluice valve device according to claim 2, further provided with a first elastic return mechanism for elastically returning and urging the pair of movable pieces to an initial position on the inner side in the crossing direction. The seal pressing portion of the pair of pressing link mechanisms is provided with an arc-shaped seal pressing surface substantially along the circumferential direction of the inner wall surface of the pipe when the pressure contact reaction force projects outward in the crossing direction. The sluice valve device according to claim 3. A second elastic return mechanism is provided between the bottom of the elastic pressure contact body and the end of the valve support member to rebound and urge the elastic pressure contact body into a substantially U-shaped initial form by elastic force. The sluice valve device according to claim 4.

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