JP4863113B2 - Flow path switching valve device - Google Patents

Description

  The present invention relates to a flow path switching valve device. More specifically, in a flow switching valve device that is provided in a fire hydrant device or the like and can switch between a normal flow channel and an inspection flow channel by attaching and detaching the inspection connection device, the normal flow from the inspection flow channel. The present invention relates to an apparatus in which when a moving valve is in a seated state with respect to a predetermined valve seat, the inspection connecting device can be disengaged and removed when switching to a road.

  For example, in a fire hydrant device, it is obliged to regularly check the flow rate and pressure of supplied water. This inspection is performed manually after mounting the inspection connection device or automatically by switching the inspection connection device from the normal flow channel to the inspection flow channel passing through the inspection connection device. ing. As an apparatus for switching such a flow path, for example, there is one described in Patent Document 1.

  In the flow path switching valve device described in Patent Document 1, when a flow path for inspection is formed, the valve body is moved by the insertion portion of the flow path connection device and is seated on a predetermined valve seat. In the case of forming the flow path, the moving valve is seated on a predetermined valve seat by the force of an urging means such as a spring along with the removal of the flow path connecting device.

Japanese Patent No. 3273320

However, the flow path switching valve device described in Patent Document 1 has the following problems.
That is, when the flow path connecting device is removed and the inspection flow path is switched to the normal flow path, the movement and seating of the valve body are automatically performed by the force of the urging means. Theoretically, it does not always operate reliably in actual use, for example, a foreign object is caught between the moving valve and the valve seat and cannot be seated.
For this reason, it is necessary for the operator to check each time whether or not the flow path is switched reliably. However, in reality, this check tends to be neglected, causing water leakage after the inspection. There are many problems.

  Accordingly, an object of the present invention is, for example, in a flow path switching valve device used in a fire hydrant device, when a moving valve is in a seated state with respect to a predetermined valve seat when switching from a flow path for inspection to a normal flow path. After the inspection connecting device can be removed by releasing the engagement of the inspection connecting device, the moving valve is seated on a predetermined valve seat. It is an object to provide a flow path switching valve device that does not require confirmation.

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Means taken by the present invention to solve the above problems are as follows.
The present invention
An inflow pipe,
An inspection outflow pipe to which the inspection connecting device can be attached and detached;
A universal outlet pipe,
A valve seat leading to the inspection outflow pipe;
A valve seat leading to the above-mentioned common outflow pipe,
It is movable between the two valve seats, can be switched to the flow path by sitting on either of the valve seats, engages with the inspection connecting device attached to and detached from the inspection outflow pipe, and the inspection connection A moving valve that is moved and operated by the device;
An inspection connecting device that is attached to and detached from the inspection outflow pipe, has an inspection connecting device side engagement means, and leads to the inspection device;
With
When the transfer valve switches from an inspection flow path leading from the inflow pipe to the inspection outflow pipe to a normal flow path leading from the inflow pipe to the general outflow pipe, the transfer valve leads to the inspection outflow pipe. A movable valve side engagement means capable of releasing engagement with the inspection connection device side engagement means of the inspection connection device when in the seating position with respect to the valve seat ;
The inspection connecting device side engaging means has a structure in which the inspection claw device moves in the engaging direction by connecting the inspection connecting device to the inspection outflow pipe, and the inspection connecting device in the removing direction. The engaging claw can move in the disengagement direction when the moving valve is in the seating position with respect to the valve seat leading to the inspection outflow pipe, and the moving valve side engaging means is further structured. , The engagement claw has an annular body that can be inserted and engaged,
It is a flow path switching valve device.

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(Function)
The operation of the flow path switching valve device according to the present invention will be described. Here, the constituent elements used in the description are assigned in correspondence with the reference numerals given to the respective parts in the embodiments described later. These reference numerals are the same as the reference numerals described in the claims of the claims. Similarly, it is only for the purpose of facilitating understanding of the contents, and the meaning of each component is not limited to the above-described parts.

In the normal state (normal use state), the flow switching valve device (A) has the moving valve (3) seated on the valve seat (22) on the outflow pipe (20) for inspection, It is a flow path from 11) to the common outflow pipe (12).
At the time of inspection, the moving valve (3) moves to the valve seat (14) on the side of the common outflow pipe (12) and is seated by the connection of the inspection connecting device (4) to the inspection outflow pipe (20). As a result, the flow path is switched from the inflow pipe (11) to the flow path leading to the inspection outflow pipe (20).

  When the inspection is completed and the inspection flow path from the inflow pipe (11) to the inspection outflow pipe (20) is switched to the normal flow path from the inflow pipe (11) to the general outflow pipe (12). The moving valve (3) is moved along with the removal of the inspection connecting device (4). When the moving valve (3) is seated against the valve seat (22) on the inspection outflow pipe (20) side, it moves only with the inspection connecting device side engaging means (43) of the inspection connecting device (4). The engagement of the moving valve side engaging means (31) of the valve (3) can be released, and the inspection connecting device (4) can be removed. That is, when the inspection connecting device (4) can be removed from the inspection outflow pipe (20), the moving valve (3) must be seated on the valve seat (22), and the operator It is not necessary to confirm whether the flow path is switched reliably.

  According to the flow path switching valve device of the present invention, the moving valve is inspected when switching from the inspection flow path leading from the inflow pipe to the inspection outflow pipe to the normal flow path leading from the inflow pipe to the general outflow pipe. The inspection connecting device is disengaged and can be removed when the valve seat leading to the outflow pipe is in a seated state. In other words, when the inspection connecting device can be removed from the inspection outflow pipe, the moving valve must be seated on the valve seat, and whether the operator has switched the flow path reliably. It is not necessary to confirm the above, and problems such as water leakage after the inspection can be prevented.

  The present invention will be described in detail based on the embodiments shown in the drawings.

FIG. 1 is an exploded cross-sectional explanatory diagram of a state in which a flow path passing through a common outflow pipe is formed in the flow path switching valve device according to the present invention,
FIG. 2 is a cross-sectional explanatory view of a state in which a flow path passing through an inspection outflow pipe is formed by connecting an inspection connecting device in the flow path switching valve device according to the present invention,
FIG. 3 is an exploded perspective view showing the structure of the moving valve, the moving valve side engaging tool, and the inspection connecting device side engaging tool,
FIG. 4 is an exploded front view showing the structure of the moving valve, the moving valve side engaging tool, and the inspection connecting device side engaging tool.
In the following description, notations such as upper, lower, vertical, and horizontal representing the position or direction of the description part are based on FIG.

  The flow path switching valve device A is contained within the valve box body 1 having the inflow pipe 11 and the common outflow pipe 12, the valve box connection body 2 having the inspection outflow pipe 20, and the valve box body 1 and the valve box connection body 2. The moving valve 3 is configured. The inflow pipe 11 and the common outflow pipe 12 are connected to a flow pipe (not shown) such as a water pipe, and an inspection connecting device 4 described later is detachably connected to the inspection outflow pipe 20.

  The valve box main body 1 has a circular pipe-shaped connecting pipe 10 provided in the longitudinal direction at the center. The upper side of the connecting pipe 10 is open, and the inner peripheral surface 100 serves as a guide portion for guiding the moving valve 3 (the structure will be described later). A circular pipe-shaped inflow pipe 11 and a common outflow pipe 12 are provided in the lower portion of the connection pipe 10 in the lateral direction. The connecting pipe 10, the inflow pipe 11, and the common outflow pipe 12 communicate with each other, and the center lines of the inflow pipe 11 and the common outflow pipe 12 are on the same axis. Large diameter connection flanges 110 and 120 are provided at the tips of the inflow pipe 11 and the common outflow pipe 12, respectively.

  A circular valve seat 14 is provided on the inner side of the valve box body 1 in the common outflow pipe 12 so as to open in the vertical direction and at the top. The center line of the valve seat 14 is on the same straight line as the center line of the connecting pipe 10 and the valve box connector 2 (the structure will be described later). The position of the opening edge of the valve seat 14 is set to a position lower than the opening edge of the connecting pipe 10.

  The base end of the support rod 15 is fixed to the bottom of the common outflow pipe 12 so that the direction of the center line of the valve seat 14 overlaps. The support rod 15 is fitted with a support spring 16 having an inner diameter larger than that of the support rod 15 and slightly longer. The lower end of the support spring 16 hits the bottom of the common outflow pipe 12, and the upper end is inserted into the insertion hole 308 at the bottom of the moving valve 3.

  The valve box connector 2 is fixed to the opening edge of the connection pipe 10. The valve box connector 2 has a circular pipe-shaped outflow pipe 20 for inspection, and a connecting flange 21 having the same outer diameter as that of the connecting pipe 10 is provided below the inspection outflow pipe 20. . A valve seat 22 that is smaller in diameter than the connection flange 21 and communicates with the inspection outflow pipe 20 is provided at the lower end of the valve box connector 2 so as to slightly protrude from the end face of the connection flange 21. Near the lower end of the inner surface of the inspection outflow pipe 20, an engagement groove 203 is provided over the entire circumference so as to engage the packing 303 on the upper side when a later-described moving valve 3 is seated on the valve seat 22. A packing 220 is provided on the outer surface of the valve seat 22 over the entire circumference. The valve box connector 2 is fixed to the connecting pipe 10 by fitting the valve seat 22 into the opening of the connecting pipe 10 and fastening the connecting flange 21 with a required number of bolts 210.

  A guide portion 201 having a slightly smaller diameter is provided on the outer side of the check outflow pipe 20 of the valve box connector 2. The guide member 201 is fitted with a release tool 23 that is operated when releasing the fixation of the inspection connecting device 4 described later. The release tool 23 includes a cylindrical portion 230 having an inner diameter slightly larger than that of the guide portion 201 and a large-diameter knob portion 231 provided at the lower end of the cylindrical portion 230, and a predetermined range along the guide portion 201. It is possible to slide with. The outer diameter of the release tool 23 is the same as the outer diameter of the inspection outflow pipe 20. Further, an engagement step 202 is provided on the upper end surface of the inspection outflow pipe 20 over the entire circumference.

A moving valve 3 is accommodated inside the valve box body 1 and the valve box connector 2. The moving valve 3 has a valve body 30 and an engagement receiver 31. The engagement receiver 31 constitutes a moving valve side engagement means.
The valve body 30 has a low substantially cylindrical valve main body 301 and a large-diameter water passage flange 302 provided on the lower side of the valve main body 301. The diameter of the valve body 301 is formed to be slightly smaller than the inner diameters of the openings of the valve seat 14 and the valve seat 22.

  The thickness of the valve body 301 on the upper side of the water passage flange 302 is formed to be approximately twice the thickness of the lower side. On the outer side of the valve body 301 on the upper side of the water flow flange 302, packings 303 that are O-rings are provided in two upper and lower stages, and on the lower side, packing 304 that is also an O-ring is provided on one stage over the entire circumference. Is provided. The upper part of the valve body 301 above the water passage flange 302 is an upper valve part 301 a seated on the valve seat 22, and the lower side is a lower valve part 301 b seated on the valve seat 14. When the valve body 301 is seated on the valve seat 14 (the side on which the packing 304 is provided is fitted) and the valve seat 22 (the side on which the packing 303 is provided is fitted) as described above, the respective openings are opened. The packings 303 and 304 can be sealed watertight.

  The water flow flange 302 is formed in a substantially disc shape, and the outer diameter is formed slightly smaller than the inner diameter of the inner peripheral surface 100 of the connection pipe 10 as described above. It can move in the vertical direction along the peripheral surface 100. The water passage flange 302 is provided with circular water passage holes 305 penetrating at six locations at equal intervals in the circumferential direction. Each water passage hole 305 is closed by the lower surface of the valve seat 22 when the valve body 30 is seated on the valve seat 22 on the valve box connector 2 side (see FIG. 1). When the body 30 is seated on the valve seat 14 on the side of the common outflow pipe 12, the body 30 is provided at a position having a water passing function (see FIG. 2: outside the outer diameter of the valve seat 14).

  The engagement receiver 31 is fixed to the upper surface 306 of the valve body 301. The engagement receiver 31 is formed by punching and bending a metal plate. The column portion 311 provided in the vertical (vertical) direction, the fixed portion 312 provided at a right angle (horizontal) at the lower end thereof, and the right end at the upper end. It has an annular engaging portion 313 provided horizontally. The fixing portion 312 is fixed to the upper surface 306 of the valve body 301 with a screw 316, and the plate-like column portion 311 is positioned so as to overlap with the diameter line of the circular upper surface 306 of the valve body 301 in plan view. .

  A central portion of the engaging portion 313 is a circular hole 314. The lower surface of the rim portion of the circular hole 314 of the engagement portion 313 can be engaged with an engagement claw 442 of the inspection connecting device 4 described later over the entire circumference. In addition, an escape portion 315 is cut out at the upper portion of the column portion 311 connected to the engaging portion 313. The escape portion 315 is provided so as not to get in the way when the engaging claw 442 of the inspection connecting device 4 is inserted into the circular hole 314 of the engaging portion 313 (see FIG. 2).

An insertion hole 308 is provided at the center of the lower surface 307 of the valve body 301. The movement valve 3 is simply supported by inserting the upper end of the support spring 16 into the insertion hole 308. The support spring 16 is for stabilizing the movement of the moving valve 3. The strength of the repulsive force of the support spring 16 is not particularly limited, and can be set as appropriate.
The moving valve 3 can move between the valve seats 14 and 22 along the inner peripheral surface 100 of the connecting pipe 10 and sits on either of the valve seats 14 and 22 to open and close the flow path. can do. The moving operation of the moving valve 3 is performed by an inspection connecting device 4 to be described later attached to and detached from the inspection outflow pipe 20.

  The inspection connecting device 4 is connected to an inspection device (not shown) by a hose. The inspection connection device 4 includes a connection tool 40. The connection tool 40 includes a hose connection pipe 401 and a connector body 402 having a cylindrical shape with an inverted bottom communicating with the hose connection pipe 401. An engagement convex portion 403 having a circular shape in a bottom view that can be fitted into the engagement step portion 202 on the upper end surface of the inspection outflow pipe 20 is provided on the inner top portion of the connector main body 402. In addition, the inner diameter of the cylindrical portion of the connector main body 402 is formed slightly larger than the outer diameter of the inspection outflow pipe 20, and the connection main body 402 and the inspection outflow pipe 20 can be fitted with almost no gap.

  A packing 404 is embedded at the upper end of the inner peripheral surface of the cylindrical portion of the connector main body 402 over the entire circumference. In addition, fixing claws 41 are provided at three locations at equal intervals in the circumferential direction on the lower opening side of the inner peripheral surface. Each fixing claw 41 can be engaged with a step portion 201a at the upper end of the guide portion 201 of the inspection outflow pipe 20 (see FIG. 2). Each fixing claw 41 is accommodated in a recessed hole 405 provided so as to pass through the side wall of the cylindrical portion of the connector main body 402. Each concave hole 405 is closed on the outer surface side by a cover 42 attached by screwing to the outer side of the cylindrical portion of the connector main body 402 on the opening side.

  Each fixing claw 41 has a horizontal upper end and is provided so as to bend and incline toward the concave hole 405 as it goes downward. Each fixing claw 41 is urged inward by a spring 406 accommodated in each concave hole 405, and normally protrudes from the inner peripheral surface of the cylindrical portion. Further, a rubber ring 420 that is a shock absorber and also has a non-slip function is attached to the outer periphery of the cover 42.

  At the center of the engagement convex portion 403 of the connection tool main body 402, an engagement tool 43 that is an inspection connecting device side engagement means is fixed. The engagement tool 43 is obtained by punching and bending a metal plate, and has a hanging part 431 provided in the vertical (vertical) direction and a fixing part 432 provided at a right angle (horizontal) at the upper end thereof. . A central portion of the fixing portion 432 is a circular hole 433, and the inner diameter of the circular hole 433 is formed to be the same as the inner diameter of the hose connection tube 401. The drooping portion 431 is positioned so as to overlap with the diameter line of the circular hole 433 of the fixing portion 432 in the bottom view.

  A substantially semicircular insertion portion 434 is provided at the lower end of the hanging portion 431 so as to protrude downward. The width of the insertion portion 434 is formed slightly smaller than the diameter of the circular hole 314 of the engagement portion 313 (about ½ of the width of the hanging portion 431), and the pressing portion 435 is provided on both sides of the insertion portion 434. It is provided horizontally. Both the pressing parts 435 hit the upper surface of the engaging part 313 of the moving valve 3 and can press down (press down). The fixing portion 432 is fixed with screws (not shown), and the circular hole 433 of the fixing portion 432 and the inner diameter of the inspection outflow pipe 20 are overlapped (same diameter).

  A plate-like engagement claw tool 44 is attached to the lower side of the hanging part 431 so as to overlap in the thickness direction. The engaging claw tool 44 is formed in a substantially “H” shape by an arm portion 441 and a hook-shaped engaging claw 442, and a corner portion is fixed by a screw 443, and can be rotated around the screw 443. is there. Further, the engaging claw tool 44 is biased counterclockwise in FIG. 1 (direction in which the engagement claw 442 and the engaging portion 313 are disengaged) by the torsion coil spring 444.

  In the normal state, the engaging claw tool 44 is such that the arm portion 441 abuts against a stopper 445 provided on the hanging portion 431, and the outer portion of the engaging claw 442 is arranged on the insertion portion 434 as shown in FIG. It stops at a position (a position where the engagement with the engaging portion 313 is released) that is substantially aligned with the outer shape portion.

(Function)
FIG. 5 is an explanatory diagram showing the movement of each part associated with the removal of the inspection connecting device.
With reference to FIG. 1 thru | or FIG. 5, the effect | action of the flow-path switching valve apparatus A which concerns on this Embodiment is demonstrated.
The state shown in FIG. 1 is a state in which the inspection connecting device 4 is removed from the flow path switching valve device A. In this state, in the flow path switching valve device A, the upper valve portion 301a of the valve main body 301 of the moving valve 3 is seated on the valve seat 22 on the valve box connector 2 side. In this state, of the upper and lower two-stage packings 303 of the moving valve 3, the upper side packing 303 is engaged with and engaged with the engagement groove 203 to perform a fixing function. Further, the lower packing 303 is crimped and deformed on the inner surface of the inspection outflow pipe 20 to perform a sealing function. Thus, a normal flow path is formed in the flow path switching valve device A from the inflow pipe 11 through the valve seat 14 and further through the common outflow pipe 12 as indicated by an arrow.

  When performing the inspection work, the inspection connecting device 4 is connected to the inspection outflow pipe 20 of the valve box connector 2. The connection is made as follows. First, the insertion portion 434 of the engagement tool 43 of the inspection connection device 4 and the engagement claw 442 of the engagement claw tool 44 are inserted into the circular hole 314 at the center of the engagement portion 313 of the movement valve 3. Then, when the connector main body 402 of the inspection connecting device 4 is fitted into the inspection outflow tube 20, the upper opening edge (including the engagement step portion 202) of the inspection outflow tube 20 is connected to the inspection connecting device 4. It hits the lower side of the tip of the arm portion 441 of the engaging claw tool 44 attached to the engaging tool 43.

  As the inspection connecting device 4 is pushed in, the engaging claw 44 is pushed in the clockwise direction against the urging force of the torsion coil spring 444 in FIG. As a result, the engagement claw 442 similarly rotates clockwise, and wraps around and engages with the lower surface side of the engagement portion 313 (see FIG. 2). Note that the tip of the arm portion 441 of the engaging claw tool 44 is in contact with the inner surface of the inspection outflow pipe 20 by the biasing force of the torsion coil spring 444, whereby the engagement between the engaging claw 442 and the engaging portion 313 is maintained. Is done.

  By further pressing the connector main body 402 of the inspection connecting device 4, the pressing portions 435 on both sides of the base portion of the insertion portion 434 hit the upper surface of the engaging portion 313 of the moving valve 3 and push the moving valve 3 down. The moving valve 3 is pushed away from the valve seat 22. The movement valve 3 is guided by the inner peripheral surface 100 of the connection pipe 10 to lower the outer peripheral portion of the water passage flange 302, and the lower valve seat 14 in which the lower valve portion 301 b of the valve body 301 communicates with the common outlet pipe 12. To be seated accurately.

  Further, when the moving valve 3 is seated on the valve seat 14 as described above, each fixing claw 41 provided on the inner surface of the connector main body 402 of the inspection connecting device 4 is connected to the guide portion of the inspection outflow pipe 20. Engages with an upper step 201 a of 201. That is, if the moving valve 3 cannot be seated on the valve seat 14 leading to the common outflow pipe 12, each fixing claw 41 cannot be engaged with the step portion 201a on the upper side of the guide portion 201, so that the fixing claw 41 is engaged. It can be seen that the movable valve 3 is seated on the valve seat 14 at the time of completion.

  As a result, the inspection connecting device 4 is connected to the inspection outflow pipe 20. As shown by an arrow in FIG. 2, the flow path switching valve device A passes through the water passage holes 305 of the water passage flange 302 from the inflow pipe 11, the valve seat 22, and the inspection outflow pipe 20. The channel is formed, and the switching of the channel is completed (see FIG. 2).

When the inspection work is finished and the flow path is switched to the normal flow path again, the following is performed.
Reference is mainly made to FIG.
First, the release tool 23 provided on the guide part 201 of the inspection outlet pipe 20 of the valve box connector 2 is pushed up along the guide part 201, and each fixing claw 41 is pushed and expanded at the upper end part of the release tool 23. The engagement with the step portion 201a on the upper side of the guide portion 201 is released (see FIG. 5A).
As a result, an operation for moving the inspection connecting device 4 in the pulling direction becomes possible. When the inspection connecting device 4 is moved in the pulling direction, the moving valve 3 is pulled up by the action of the engaging claw 442 engaged with the lower surface side of the engaging portion 313, and the lower valve portion 301 b of the valve main body 301 and the valve seat are moved. The 14 seating is removed.

  Similarly to the descending operation, the moving valve 3 is guided and raised by the inner peripheral surface 100 of the connecting pipe 10, and the upper valve portion 301 a of the valve body 301 is seated on the upper valve seat 22. At this time, the upper packing 303 of the upper and lower packings 303 of the moving valve 3 is engaged with and engaged with the engagement groove 203. In the moving stage before the moving valve 3 is seated, the support spring 16 helps the moving valve 3 to rise by its spring force. Further, the contact between the arm portion 441 of the engaging claw tool 44 and the inner surface of the inspection outflow pipe 20 is released, but the engagement claw tool 44 is in contact with the engaging claw 442 and the engaging portion 313, thereby Then, the torsion coil spring 444 is not rotated as it is against the urging force of the torsion coil spring 444 and is maintained in a stopped state (see FIG. 5B). When the moving valve 3 is seated on the valve seat 22, the flow path is switched from the inflow pipe 11 to the normal flow path that passes through the valve seat 14 and the common outflow pipe 12.

  Further, when the inspection connecting device 4 cannot be moved in the pulling direction because the moving valve 3 is seated on the valve seat 22, the pulling operation is once loosened. As a result, the friction between the contact portion of the engagement portion 313 and the engagement claw 442 is eliminated, and the arm portion 441 of the engagement claw tool 44 that has already come out from the opening edge portion of the inspection outflow pipe 20 is twisted with the torsion coil spring 444. The engagement claw 442 is similarly rotated and released from the engagement with the engagement portion 313 (see FIG. 5C).

  That is, when the moving valve 3 is securely seated on the valve seat 22, the arm portion 441 of the engaging claw tool 44 is detached from the inner surface of the inspection outflow pipe 20 and is rotated by the biasing force of the torsion coil spring 444. The engagement claw 442 can be moved to a position where the engagement can be released. As a result, the insertion portion 434 and the engagement claw 442 can be extracted from the circular hole 314 of the engagement portion 313, and the inspection connection device 4 is moved for inspection by moving the inspection connection device 4 in the pulling direction. It can be removed from the outflow pipe 20 (see FIG. 1).

  As described above, according to the flow path switching valve device A, when switching from the inspection flow path leading from the inflow pipe 11 to the inspection outflow pipe 20 to the normal flow path leading from the inflow pipe 11 to the common outflow pipe 12. In addition, the engagement between the inspection connecting device 4 and the movable valve 3 can be released only when the movable valve 3 is seated on the upper valve seat 22 where the movable valve 3 communicates with the inspection outflow pipe 20. Connection device 4 can be removed. That is, when the inspection connecting device 4 can be removed from the inspection outflow pipe 20, the moving valve 3 is always seated on the valve seat 22, and the operator can reliably switch the flow path. There is no need to check if it is broken.

  Note that the terms and expressions used in the present specification are merely explanatory and not restrictive, and do not exclude terms and expressions equivalent to the above terms and expressions. The present invention is not limited to the illustrated embodiment, and various modifications can be made within the scope of the technical idea.

Exploded cross-sectional explanatory drawing of the state which formed the flow path which passes a common outflow pipe | tube in the flow-path switching valve apparatus which concerns on this invention. Cross-sectional explanatory drawing of the state which connected the connection apparatus for inspection in the flow-path switching valve apparatus which concerns on this invention, and formed the flow path which passes along the outflow pipe for inspection. The disassembled perspective view which shows the structure of a movement valve, a movement valve side engagement tool, and the connection apparatus side engagement tool for an inspection. The disassembled front view which shows the structure of a movement valve, a movement valve side engaging tool, and the connection apparatus for inspection side engaging tool. Explanatory drawing which shows the motion of each part accompanying removal of the inspection connecting device.

Explanation of symbols

A flow path switching valve device 1 valve body 10 connecting pipe 100 inner peripheral surface 11 inflow pipe 110 connecting flange 12 common outflow pipe 120 connecting flange 14 valve seat 15 support rod 16 support spring 2 valve box connection body 20 outflow for inspection Pipe 201 Guide part 201a Step part 202 Engagement part 203 Engagement groove 21 Connecting flange 210 Bolt 22 Valve seat 220 Packing 23 Release tool 230 Cylindrical part 231 Knob part 3 Moving valve 30 Valve body 301 Valve body 301a Upper valve part 301b Lower valve portion 302 Water passage flange 303 Packing 304 Packing 305 Water passage hole 306 Upper surface 307 Lower surface 308 Insertion hole 31 Engagement receiver 311 Column portion 312 Fixing portion 313 Engagement portion 314 Circular hole 315 Escape portion 316 Screw 4 Connection device for inspection 40 connection tool 401 hose connection pipe 402 connection tool body 403 Engagement projection 404 Packing 405 Recess hole 406 Spring 41 Fixing claw 42 Cover 420 Rubber ring 43 Engagement tool 431 Hanging part 432 Fixing part 433 Circular hole 434 Insertion part 435 Press part 44 Engagement claw tool 441 Arm part 442 Engagement Claw 443 Screw 444 Torsion coil spring 445 Stopper

Claims (1)

An inflow pipe (11),
An inspection outflow pipe (20) to which the inspection connecting device (4) can be attached and detached;
A universal outlet pipe (12);
A valve seat (22) leading to the inspection outflow pipe (20);
A valve seat (14) leading to the universal outlet pipe (12);
It is movable between the two valve seats (14, 22), can be seated on either of the valve seats (14, 22) and the flow path can be switched, and is attached to and detached from the inspection outflow pipe (20). A movable valve (3) that is engaged with the inspection connecting device (4) and is moved by the inspection connecting device (4);
The inspection connecting device (4) connected to the inspection device, having an inspection connecting device side engagement means (43) attached to and detached from the inspection outflow pipe (20),
With
The transfer valve (3) is a normal flow passage from the inflow pipe (11) to the common outflow pipe (12) from the inflow pipe (11) to the inspection outflow pipe (20). When switching to the flow path, when the moving valve (3) is in the seating position with respect to the valve seat (22) leading to the inspection outflow pipe (20), the inspection connection device (4) is engaged on the inspection connection device side. A moving valve side engagement means (31) capable of releasing the engagement with the means (43) ,
The structure of the inspection connecting device side engaging means (43) is such that the engaging claw (442) moves in the engaging direction by connecting the inspection connecting device (4) to the inspection outflow pipe (20). When the inspection connecting device (4) is moved in the removal direction and the moving valve (3) is in the seating position with respect to the valve seat (22) leading to the inspection outflow pipe (20) (442) is configured to be movable in the disengagement direction, and the structure of the moving valve side engaging means (31) is an annular body (313) into which the engaging claw (442) can be inserted and engaged. )
Flow path switching valve device.

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