JP2002126119A - Hydrant device and passage switching mechanism - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a passage switching mechanism of a directional selector valve capable of switching a passage, seating a valve element on a valve seat by an elastic body for energizing an inserting part by moving the valve element by the inserting part when switching the passage, and energizing the valve element to either of a first valve seat or the second valve seat by attaching and detaching the inserting part. SOLUTION: This directional selector valve has oppositely arranged first valve seat and the second valve seat, a valve element movably arranged between these valve seats, and an energizing means for energizing the valve element for setting the element on the second valve seat. A passage connecting device is provided with a passage connecting inserting part for oppositely pushing the valve element of the directional selector valve against the energizing means, an outside slide for engaging the tip with the directional selector valve, and the elastic body stronger than the energizing means for pushing up the passage connecting inserting part from the outside slide. By engaging this passage connecting device with the directional selector valve, the valve element's separated from the second valve seat, and is seated on the first valve seat.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a fire hydrant device provided with a direction switching valve, and more particularly to a flow path switching mechanism using a direction switching valve for switching the flow of a fluid to a desired direction.

[0002]

2. Description of the Related Art A directional control valve is provided in the middle of a flow path.
The flow direction of the fluid can be switched on the upstream side or the downstream side, and has conventionally been used for various uses in a device having a flow path.

FIG. 8 is a flow diagram showing an example of a flow path provided with a conventional switching valve. In the flow path 507 shown in the figure, 500 is a switching valve, 501 is an inflow port, 502 is a first outflow port, 503 is a second outflow port, 504 is an upstream flow path connected to the inflow port 501, and 505 is a fourth flow path. A downstream first flow path 506 connected to the first outlet 502 is a downstream second flow path connected to the second outlet 503. The switching valve 500 allows the fluid flowing from the inflow port 501 to flow out of the first outflow port 502 without flowing out of the second outflow port 503, or the second outflow port without flowing out of the first outflow port 502. 50
3 is configured to be able to be switched. Therefore, the flow path 507 has a downstream first flow path 505 and a downstream second flow path 506 downstream of the switching valve 500.
, Which can switch the flow direction of the fluid.

As described above, the switching valve is used for various purposes. One example of such a purpose is maintenance and inspection of a flow path. That is, taking the flow channel 507 shown in FIG. 8 as an example, the flow channel 507 always flows from the upstream flow channel 504 to the downstream first flow channel 505 via the switching valve 500. In order to perform the maintenance and inspection of the flow path 507, the flow direction of the fluid is switched by the switching valve 500, that is, the outflow of the fluid from the first outlet 502 is shut off, and the fluid flows to the downstream first flow path 505. In some cases, maintenance and inspection of the flow path is performed by preventing the flow and flowing the fluid from the second outflow port 503 so that the fluid flows to the second downstream flow path 506.

However, when the switching valve is used for maintenance and inspection of the flow path as described above, the maintenance direction is switched by switching the flow direction, and then the distribution direction is switched again by the switching valve. It is necessary to return to the distribution direction in. This is because the device provided with the flow path may not perform its intended function unless the flow direction of the fluid is the normal flow direction.

By the way, there is a fire hydrant device as an example of a device having a flow path. This fire hydrant device is installed in a tunnel or the like, and is used to extinguish a fire generated by a fire extinguishing agent discharged from a nozzle through a fire extinguishing hose. Are provided in the configuration.

In the above-described fire hydrant device, whether the fire hydrant device has a predetermined discharge function and discharge performance, for example, the discharge pressure and discharge amount of a fire extinguishing agent discharged from a nozzle through a fire hose. It is necessary to check whether or not satisfies a predetermined value.

Prior to this application, the applicant of the present application filed a patent application (Japanese Patent Application No. 11-278051) on a method for checking emission of a fire hydrant device using a three-way switching valve for checking emission in a fire hydrant device as described above. No.)
According to the invention according to the earlier patent application, at the time of emission inspection of the fire hydrant device, the secondary side flow path is switched from the fire extinguishing hose side flow path to the emission inspection apparatus side flow path by the three-way switching valve to perform emission inspection. However, after the discharge check operation, the three-way switching valve switches the secondary flow path again by the three-way switching valve so that the fire hydrant device can perform its intended function, that is, the fire extinguishing function. It is necessary to return to the road.

[0009]

In a conventional switching valve, for example, when the above-mentioned switching valve is used for maintenance and inspection of a flow path provided with the switching valve, the flow is switched from one flow path to another flow path. After switching the flow direction of the fluid to the path, it may be necessary to switch the flow direction again to return to the original flow path. In such a case, if the operator does not perform the return operation in the distribution direction, the device provided with the flow path may not be able to perform its intended function. There is.

In the case where the switching valve is used for the discharge check of the fire hydrant device as described above, the fire hydrant device cannot perform the fire extinguishing function unless the return operation of the flow direction is forgotten. is necessary.

SUMMARY OF THE INVENTION In view of the above circumstances, an object of the present invention is to provide a fire hydrant device capable of performing a discharge check without passing water through a fire hose.

Further, according to the present invention, the flow path can be switched, and at the time of switching the flow path, the valve element is moved by the insertion portion, and the valve element is moved by the elastic body for urging the insertion portion. An object of the present invention is to obtain a flow path switching mechanism of a directional switching valve that can be seated on a seat, and a valve body is urged to one of a first valve seat and a second valve seat by attaching and detaching an insertion portion. .

A further object of the present invention is to provide a flow path switching mechanism of a directional control valve which can prevent the user from forgetting to return the flow direction.

[0014]

According to the present invention which achieves the above object, there is provided a fire hydrant valve, a fire hose provided on a secondary side of the fire hydrant and having a nozzle at a tip end, and a fire extinguishing hose. A fire hydrant device comprising a directional switching valve provided on a primary side of a hose, wherein the directional switching valve comprises:
It has an outlet to which the emission check device is connected, and normally forms a flow path from the hydrant valve to the fire hose, and when the discharge check device is connected to the outlet,
A fire hydrant device, characterized in that the fire hydrant device is closed while switching the fire hydrant valve to the discharge inspection device to form a flow path and closing the fire hose.

The first valve seat and the second valve seat are arranged to face each other, and the valve body is provided movably between them, and the valve body is seated on the second valve seat. Directional switching valve provided with biasing means for biasing the directional switching valve, and a flow path connection insertion portion for pushing a valve body of the directional switching valve in opposition to the biasing means; There is a flow path connection device including an external slide to be combined and an elastic body stronger than the urging means for pushing up the flow path connection insertion portion from the external slide, and the flow path connection device is engaged with the direction switching valve. In this case, the valve body is separated from the second valve seat and is seated on the first valve seat.

[0016]

DESCRIPTION OF THE PREFERRED EMBODIMENTS An embodiment of the present invention will be described with reference to FIGS.

First, an embodiment of a directional control valve and a fire hydrant device of the present invention will be described. In the following, an example in which the directional control valve of the present invention is applied to a fire hydrant device will be described. However, the application of the directional switch valve of the present invention is not limited to a fire hydrant device, and may be applied to devices other than a fire hydrant device. Of course, application is possible.

In FIG. 7, reference numeral 1 denotes a fire hydrant device installed in, for example, a tunnel or the like, and a pressure regulating valve 2, a fire hydrant valve 3, a directional switching valve 4, and a nozzle 6 at a tip end through a pipe P from the primary side. Fire extinguishing hose 5 having Although not shown, the primary side of the pressure regulating valve 2 is connected to a water supply source, and the fire hydrant device 1 receives the supply of fire extinguishing water from the water supply source and discharges the fire extinguishing water from the nozzle 6 to cause a fire. Extinguish a fire. If necessary, the fire hydrant device 1 may be provided with a fire extinguishing agent supply source, for example, a foam stock solution supply source, and the foam stock solution may be added to the fire extinguishing water and discharged from the nozzle 6.

Reference numeral 7 denotes a discharge inspection device having a flow passage inside the device, which is provided with a tubular body 73 and a flow passage connection insertion portion 71 connected to the direction switching valve 4, and is provided with a nozzle of a fire hydrant device to be inspected. It has a nozzle connection end 72 to which a nozzle appropriately selected according to the type can be connected, and a pressure gauge 8 for measuring the discharge pressure of the fire extinguishing agent discharged from the discharge inspection device 7. The tubular body 73 is formed of a flexible material in consideration of ease of handling at the time of inspection of the emission inspection device 7, and is formed of, for example, a shape-retaining hose or a rubber hose. Further, the discharge inspection device 7 is configured such that the discharge nozzle is connected to the nozzle connection end portion 72, and the directional control valve 4 of the fire hydrant device 1 is used to connect the fire extinguishing hose 5 to the fire hydrant device 1.
The pressure loss generated in the fire extinguishing agent flowing through the discharge inspection device 7 is the same as the pressure loss generated in the fire extinguishing agent flowing through the flow path leading to the discharge nozzle 6. Specifically, although not shown, a pressure adjusting means, for example, an orifice is provided in the flow path in the discharge inspection device 7. The nozzle connected to the nozzle connection end portion 72 of the emission inspection device 7 includes a nozzle 6 of the fire hydrant device 1 as shown in FIG.
May be relocated and connected.

As shown in FIG. 1, the directional control valve 4 has one inlet 43 as an example of a third opening, a first outlet 41 as an example of a first opening, and a second outlet 43. And a second outlet 42 as an example. The inlet 43 is connected to a pipe P on the primary side of the direction switching valve 4, and the first outlet 4
1 is connected to the fire hose 5 via a pipe P.

The directional control valve 4 is provided with a first outlet 41 so that the fire can be extinguished by discharging a fire extinguishing agent from the nozzle 6 through the fire extinguishing hose 5 at all times, that is, during standby for fire. And the inlet 43 communicate with the second outlet 42
And the inflow port 43 are not in communication (details will be described later). In this state, by opening the fire hydrant valve 3, the fire extinguishing agent flows from the direction switching valve 4 to the flow path on the fire extinguishing hose 5 side and is discharged from the nozzle 6. That is, in this state, the fire extinguishing agent can be discharged from the nozzle 6 toward the fire.

Further, when the flow passage connecting insertion portion 71 of the discharge inspection device 7 is inserted into the second outlet 42 of the directional control valve 4,
The inside of the discharge inspection device 7 and the inflow port 43 are in communication, and the first outflow port 41 and the inflow port 43 are not in communication (details will be described later). That is, the secondary flow path of the directional control valve 4 is switched from the flow path on the fire extinguishing hose 5 side to the flow path on the emission check device 7 side. In this state, by opening the fire hydrant valve 3, the emission inspection of the fire hydrant device 1 by the emission inspection device 7 becomes possible. In the present invention, since the discharge inspection device 7 is connected to the secondary side of the direction switching valve 4 to perform the discharge inspection, the emission inspection device 7 can inspect the discharge inspection device 7 including the direction switching valve 4. This means that the fire extinguishing nozzle 6 is disposed on the primary side.
In the case where the fire extinguishing nozzle 6 is moved to and inspected, the fire extinguishing nozzle 6 can be inspected. ).

The position of the directional control valve 4 is provided. In order to prevent water from flowing through the fire extinguishing hose 5 at the time of discharge inspection, the directional switching valve 4 may be provided on the primary side of the fire extinguishing hose 5. Becomes However, it is preferable to provide the direction switching valve 4 on the primary side of the fire hose 5 and on the secondary side of the fire hydrant valve 3. Because the secondary side of the fire hydrant valve 3 is not filled with high-pressure primary-pressure water, the directional control valve 4 can be easily provided, and the function and performance of the fire hydrant valve 3 can be checked at the time of discharge inspection. Is obtained. More preferably, the primary side of the fire-extinguishing hose 5 and the secondary side of the pressure regulating valve 2 are preferable. This is because, when the directional control valve 4 is provided on the primary side of the pressure regulating valve 2, it is necessary to provide a means having the same pressure reducing function as the pressure regulating valve 2 in the discharge inspection device 7; This is because, for example, there is no need to provide a means having such a pressure reducing function, and the function and performance of the pressure regulating valve 2 can be checked at the time of discharge check. In view of the above, in the present embodiment, the direction switching valve 4 is provided on the primary side of the fire extinguishing hose 5 and on the secondary side of the fire hydrant valve 3 and the pressure regulating valve 2.

Next, the detailed configuration of the directional control valve 4 will be described. 1 and 2 show a first embodiment thereof,
1 is a cross-sectional view showing a state in which the emission inspection device 7 is connected on the right side of the drawing with respect to the center line C, and a state where the emission inspection device 7 is not connected on the left side of the drawing. FIG. FIG.

In the figure, 40 is a valve box, 41 is a first outlet, 42 is a second outlet, 43 is an inlet, and a fire extinguishing hose 5 is connected to the first outlet 41 via a pipe P. The second flow outlet 42 is connected to a flow path connection insertion portion 71 having an opening 70 of the discharge inspection device 7 and is inserted thereinto.
Is connected to a pipe P on the primary side of the direction switching valve 4.

Reference numeral 45 designates a first internal passage communicating with the first outlet 41 at all times, that is, in a state in which the discharge inspection device 7 is not connected, and a first valve seat 46 is provided at an edge thereof. I have. Reference numeral 47 denotes a second internal communication port which faces the first internal communication port 45 and communicates with the second outflow port 42, and a second valve seat 48 is provided at an edge thereof.

Reference numeral 49 denotes a valve body, which is guided by a shaft 51 provided through the valve body 49 and is provided with a first internal port 45.
And the second internal passage 47.
The valve body 49 is provided with an elastic body 50 as an example of an urging means.
(For example, a spring or rubber) by the elastic force of the second internal opening 4.
7 and is always seated on the second valve seat 48 so as to close the second internal passage 47 at the time of standby for fire, and the state is maintained by the urging force of the elastic body 50. ing. In this state, the first outlet 41 and the inlet 4
3 and the second outlet 42 and the inlet 43 are kept out of communication. When the fire hydrant valve 3 is opened, the fire extinguishing agent flows from the directional control valve 4 to the fire extinguishing hose. It flows into the flow path on the 5 side and is discharged from the nozzle 6, and fire extinguishing is possible.

The valve element 49 is connected to the first internal connection port 71 of the discharge inspection device 7 in a state where it is inserted and connected to the inside of the valve from the second outlet port 42 through the second internal port 47. It moves toward the opening 45 against the urging force of the elastic body 50, separates from the second valve seat 48, and sits on the first valve seat 46 so as to close the first internal opening 45. This allows
The inside of the discharge inspection device 7 and the inflow port 43 are
While communicating through an opening 70 provided in the first
The outlet 41 and the inlet 43 are not in communication with each other, and the secondary side flow path of the directional control valve 4 is switched from the flow path on the fire extinguishing hose 5 side to the flow path on the discharge inspection device 7 side. . In this state, by opening the fire hydrant valve 3, the emission inspection of the fire hydrant device 1 by the emission inspection device 7 becomes possible.

Next, regarding the means for connecting the emission check device 7 to the directional control valve 4, the secondary flow path of the directional control valve 4 is changed from the flow path on the fire extinguishing hose 5 side to the flow on the discharge check device 7 side. As long as the means can be switched to the road and can maintain the state, for example, a screwing means may be used, but in the present embodiment, the work of connection and removal can be easily performed. To be able to
The following configuration is provided.

That is, the directional control valve 4 has a tip projection 52 formed on the inner periphery of the attachment portion 44, and a circumferential groove 53 on the outer periphery thereof and a longitudinal direction extending to the end on the second outlet 42 side. An L-shaped groove 55 including the groove 54 is formed.

In the discharge inspection device 7, a first step portion 77 and a second step portion 78 are formed on the outer periphery of the flow path connection insertion portion 71,
Further, on the outer circumference of the flow path connection insertion portion 71, a distal projection 75 and a base projection 76 are provided on the inner circumference, and the lengthwise direction of the flow connection insertion portion 71 is provided via the second step portion 78 of the flow channel connection insertion portion 71. Is provided with a slidable external slide 74. Base end protrusion 7 of external slide 74
Between the base 6 and the base end 81 of the second step portion 78 of the flow path connection insertion section 71, an elastic body (such as a spring or rubber) for urging the flow path connection insertion section 71 toward the insertion side end 82 thereof ) 79 is provided. The flow path connection insertion section 71 and the external slide 74 are normally connected to the flow path connection insertion section 7 by the urging force of the elastic body 79.
The state in which the distal end 80 of the first second step portion 78 and the distal end side projection 75 of the external slide 74 are in contact with each other is maintained.

The flow path connection insertion portion 71 is connected to the second
When inserting from the outflow port 42, the tip side projection 75 of the external slide 74 is connected to the L-shaped groove 55 of the attachment 44.
From the longitudinal groove 54. At this time, the distal end 84 of the first step portion 77 of the flow path connection insertion section 71 is inserted while being in contact with the distal end projection 52 of the attachment section 44, and the external slide 74 is moved with respect to the flow path connection insertion section 71. It slides in the direction of the insertion side end portion 82, and the front end 80 of the second step portion 78 of the channel insertion connection portion 71 and the external slide 7
4 is separated from the distal end protruding portion 75, and a holding portion 83 of the base end 56 of the attachment portion 44 is formed thereat. The valve body 49 is pushed and moved to be seated on the first valve seat 46.) In this state, the tip protrusion 75 of the external slide 74
Is rotated along the circumferential groove 53 of the L-shaped groove 55 of the attachment portion 44 in the circumferential direction. Thereby, the flow path connection insertion portion 71 of the discharge inspection device 7
Is locked when inserted and connected inside the directional control valve 4. Reference numerals 58, 59, and 60 denote O-rings for sealing.
The elastic body 7 on the side of the flow path connecting device 71
9, the elastic body 79
Is stronger than the urging force of the elastic body 50 of the direction switching valve 4.

When removing the flow path connection insertion portion 71 from the direction switching valve 4, the external slide 74 is rotated in the circumferential direction opposite to the above, and the distal end projection 75 of the external slide 74 passes through the longitudinal groove 54. State. Thereby, the flow path connection insertion portion 71 can be pulled out from the direction switching valve 4.

The means for connecting the discharge inspection device 7 to the direction switching valve 4 is not limited to the above. A directional control valve 4 provided with another connecting means different from the above will be described below as another embodiment. Note that components having the same names and functions as those of the first embodiment of the directional control valve 4 are denoted by the same reference numerals, and description thereof is omitted.

FIG. 3 shows a directional control valve 4 according to a second embodiment. In addition, FIG.
On the right side of the drawing, a state where the discharge inspection device 7 is connected is shown, and on the right side of the drawing a state where it is not connected.
In the second embodiment, instead of the L-shaped groove 55 of the attachment portion 44 in the first embodiment,
The groove portion 85 is provided only in the circumferential direction, and an inclined claw portion 86 that engages with the groove portion 85 is provided on the outer periphery of the flow path connection insertion portion 71 so as to correspond to the groove portion 85. As shown in FIG.
Is provided on the outer periphery of the flow path connection insertion portion 71 with an inclined claw portion 86 engaging with the circumferential groove portion 85 at a tip hook-like portion 87.
Locking first external slide 88 and a circumferential groove portion 85 of an inclined claw portion 86 of the first locking external slide 88.
Having a hook-shaped release portion 89 for releasing engagement with
It has an external slide 90. First external slide 88
The inclined claw portion 86 has a bottom portion 91 protruding from the inner periphery of the first external slide 88, and an elastic body (spring, rubber, etc.) 93 provided in the hook-like portion 87 of the first external slide 88.
Urged toward the inside of the first outer slide 88.

When the channel connection insertion portion 71 is inserted into the direction switching valve 4, the inclined claw portion 86 is attached to the attachment portion 4.
4 moves toward the outside of the first external slide 88 against the urging force of the elastic body 93 by the outer periphery of the elastic body 93, and when the bottom portion 91 reaches the circumferential groove 85, the original position is generated by the urging force of the elastic body 93. The bottom portion 91 engages with the circumferential groove portion 85, and the base portion 56 of the attachment portion 44 at the holding portion 83 between the flow path connection insertion portion 71 and the first external slide 88.
Is held, and the flow path connection insertion portion 71 is connected to the direction switching valve 4 and locked.

When removing the flow path connection insertion portion 71 from the direction switching valve 4, the second external slide 90 is slid in the direction of the base end 94 thereof. Hook release part 8 of second external slide 90
9 has a slanted claw portion 86 with a first external slide 88.
In the direction toward the outside of the bottom 9 of the inclined claw portion 86.
1 is detached from the circumferential groove 85. Thereby, the channel connection insertion portion 71 can be removed by pulling it out of the direction switching valve 4. Here, the operator can remove the flow path connection insertion portion 71 with only one action of pulling the second external slide 90 in the direction of the base end 94, and the turning operation as in the first embodiment is required. And not.

In the case where the attachment portion 44 of the directional control valve 4 is provided with a groove 85 only in the circumferential direction as in the second embodiment, the discharge inspection device 7 has the flow passage connection insertion portion 71 side.
As the configuration on the side, in addition to the configuration as in the second embodiment, for example, there is also a configuration as shown in FIG. FIG.
Is a sectional view on the right side of the drawing with respect to the center line C, and an external view on the left side of the drawing. That is, as shown in FIG.
6, a claw portion 98 is formed on the inner periphery of the distal end 97 and protrudes inside the outer slide 96.
Further, the attachment portion 4 is provided between the inner periphery of the distal end 97 of the external slide 96 and the second step portion 78 of the flow path connection insertion portion 71.
4 are provided. Further, the external slider 96 is provided with an opening / closing portion 100 that opens and closes the tip 97 side inward and outward of the external slider 96 with the opening / closing base 99 as a fulcrum.
Thus, it is constantly urged in a direction toward the inside of the external slider 96. 101 is a lever, and this lever 101
Is moved in the direction toward the inside of the external slide 96 so as to hold the opening / closing unit 100 so as to open in the direction toward the outside of the external slide 96. When the flow path connection insertion portion 71 shown in FIG. 4 is connected to the direction switching valve 44, the attachment portion 44 abuts on the tapered surface of the claw portion 98, thereby opening the opening / closing portion 100 of the external slide 96 and switching the direction. Base end 56 of attachment part 44 of valve 4
When the opening / closing section 100 is closed by a spring (not shown) while the claw section 98 is engaged with the circumferential groove section 85 while holding the inside of the holding section 83, the flow path connection insertion section 71 is connected to the direction switching valve 4. It is locked. Conversely, the channel connection insertion section 7
1 is removed from the directional control valve 4, the lever 101
The opening / closing section 100 of the external slide 96 is opened by grasping the lever 101 using the
Not to be engaged with the circumferential groove portion 85. Thereafter, the flow path connection insertion portion 71 can be removed by pulling it out of the direction switching valve 4.

Instead of fitting the claw 98 into the groove 85 of the direction switching valve 4, a ball may be used. The ball is always held down by an internal slide having the same diameter as the outer periphery of the attachment 44, and Contact with the groove 85
It is possible to adopt a structure in which the ball fits when the ball is located, without providing an external slide having a step portion for pushing the ball on the opposite side of the ball without biasing the ball with an elastic body at that time, The fitting of the ball may be confirmed by the operation of the external slide.

Further, as in the first embodiment,
The attachment portion 44 of the direction switching valve 4 has an L-shaped groove 55
In this case, another embodiment different from the above-described first embodiment will be described as a third embodiment of the directional control valve 4 with reference to FIGS. 5 shows a state in which the flow path connection insertion portion 71 of the discharge inspection device 7 is connected to the direction switching valve 4 on the right side of the drawing with respect to the center line C, and a state in which the left side of the drawing is not connected. FIG. 6 is a cross-sectional view, and FIG. 6 shows only the flow path connection insertion portion 71 of the discharge inspection device 7 in a state where it is not connected to the directional control valve 4. Is shown.

As shown in FIG. 5, a first protrusion 102 and a second protrusion 103 are formed on the inner periphery of the attachment portion 44 of the directional control valve 4, and the outer periphery of the attachment portion 44 is formed on the outer periphery of the attachment portion 44. An L-shaped groove is formed as in the first embodiment.

As shown in FIGS. 5 and 6, the flow path connection insertion portion 71 has a first step portion 104 and a second step portion 10 on its outer periphery.
And a protective cover 106 slidable in the length direction of the flow path connection insertion portion 71 on the outer periphery thereof;
A protective cover stopper portion 107 and an external slide 108 slidable in the length direction of the flow path connection insertion portion 71 are sequentially provided. The protective cover 106 has a distal end 1 between the base-side protrusion 111 of the protective cover 106 and the second step 105.
An elastic body (spring, rubber, or the like) 117 that urges in the 09 direction is provided.
An elastic body (spring, rubber, etc.) for urging the flow path connection insertion portion 71 in the direction of the insertion side end portion 82 between the first step portion 105 and the second step portion 105.
118 are provided. Protective cover 10 at all times
6, the base protrusion 111 is engaged with the protrusion 113 of the protective cover stopper 107 as shown in FIG. 6, so as to cover the insertion side end 82 of the flow path connection insertion part 71. Is held. In addition, always the external slide 108
The protrusion 114 on the tip side is the protective cover stopper 107
Is held at a position where it engages with the front end 115.

When connecting the flow passage connection insertion portion 71 to the direction switching valve 4, the flow passage connection insertion portion 71 is inserted from the second outlet 42, and the front end 110 of the first step portion 104 and the front end of the protective cover 106 are formed. Reference numeral 109 abuts on the first step portion 102 and the second step portion 103 on the inner periphery of the attachment portion 44, and the outer slide 108 slides in the direction of the front end 116 thereof, and protects the front side protrusion 114 of the outer slide 108 with the protection. The holding portion 83 of the base end 56 of the attachment portion 44 is formed apart from the distal end 115 of the cover stopper portion 107. In this state, the distal end side protrusion 114 of the external slide 108 is inserted into the longitudinal groove 54 of the L-shaped groove 55 of the attachment portion 44, and the external slide 108 is further rotated in the circumferential direction while being along the circumferential groove 53. . As a result, as shown in FIG. 6, the base 56 of the attachment portion 44 is held by the holding portion 83, and the distal end side protrusion 114 of the external slide 108 is engaged with the circumferential groove 53 of the attachment portion 44. The state is held by the urging force of the elastic body 118, and the flow path connection insertion portion 71 of the discharge inspection device 7 is inserted into the direction switching valve 4 and the connected state is locked.

Next, a description will be given of an embodiment of a method for inspecting discharge of a fire hydrant device according to the present invention, which is carried out using the fire hydrant device 1 provided with the directional control valve 4 configured as described above.

The fire check method of the fire hydrant device of the present invention is implemented by the following steps. Step 1: the second outlet 42 of the directional control valve 4 of the fire hydrant device 1
Is connected to the flow path connecting / inserting portion 71 of the discharge inspection device 7 (this automatically switches the secondary flow path of the direction switching valve 4 to the flow path on the discharge inspection device 7 side). Step 2: The fire hydrant valve 3 of the fire hydrant device 1 is opened. Step 3: The fire extinguishing agent is discharged from the discharge inspection device 7, and the discharge pressure is measured by the pressure gauge 8 to check whether the discharge pressure of the fire hydrant device 1 satisfies a predetermined value. Step 4: After the discharge check operation is completed, the flow path connecting insertion portion of the discharge check device 7 is removed from the second outlet 42 of the directional control valve 4 (the secondary flow path of the directional control valve 4 is extinguished). It automatically switches to the flow path on the hose 5 side and returns.)

By performing the discharge inspection as described above, the primary side structure of the fire hydrant apparatus 1 including the directional control valve 4, that is, the directional control valve 4, the hydrant valve 3, the pressure regulating valve 2, and the piping P connecting these components However, when the nozzle 6 is relocated to the discharge inspection device 7 for inspection, it is possible to check whether the nozzle 6 has a predetermined function and performance by measuring the discharge pressure.

In FIG. 7, the pipe P of the fire hydrant device 1 is provided with a pressure regulating valve 2, a fire hydrant valve 3, and a direction switching valve 4 from the primary side to which water is supplied. The position with the valve 3 may be exchanged.
Is located on the secondary side of the fire hydrant valve 3, so that the pressure regulation does not always have to function.

After the discharge check operation is completed, the flow direction of the secondary flow path of the directional control valve 4 is changed by pulling out the flow path connecting insertion portion 71 of the discharge check device 7 from the second outlet 42 of the directional control valve 4. The flow is automatically switched from the discharge inspection device 7 side channel to the fire extinguishing hose 5 side channel. Therefore, even if the flow direction of the secondary flow path of the directional control valve 4 is switched for the discharge inspection of the fire hydrant device 1, if the discharge inspection device 7 is pulled out after the maintenance and inspection, the secondary flow of the directional control valve 4 is removed. Since the flow direction of the road automatically returns to the normal direction, the return operation of the flow direction of the secondary flow path of the direction switching valve 4 is not forgotten.

Further, by performing the discharge check as described above, the discharge check can be performed without passing the water through the fire hose 5. For this reason, there is no need to pull out all the fire extinguishing hose 5 to discharge the residual water in the fire extinguishing hose 5 after the discharge inspection work, and it is not necessary to re-engage the drawn out fire extinguishing hose 5 and store it again.

[0050]

The present invention is constructed as described above.
The following effects can be obtained.

According to the fire hydrant device of the present invention, at the time of the discharge inspection work of the fire hydrant device, the discharge inspection device can be connected and the discharge inspection can be performed without passing water through the fire hose. Using a valve, the discharge inspection can be performed by switching the flow path from the normal fire-extinguishing hose side to the emission inspection device side. Therefore, after the discharge inspection work, it is not necessary to pull out all the fire extinguishing hoses to discharge the residual water in the fire extinguishing hoses, and it is not necessary to rewind the fire extinguishing hoses and store them again.

According to the flow path switching mechanism of the directional control valve of the present invention, the flow path can be switched, and at the time of the flow path switching, the valve element is moved by the insertion portion, and the insertion portion is attached. The valve body can be seated on the valve seat by the urging elastic body, and the valve body is urged to either the first valve seat or the second valve seat by attachment / detachment of the insertion portion.

Further, according to the flow path switching mechanism of the directional control valve of the present invention, even if the flow direction of the flow path is switched, if the flow path connecting device is pulled out from the directional control valve, the flow direction of the directional control valve is changed. Since the direction is automatically returned to the normal direction, the return operation of the flow direction of the directional control valve is not forgotten.

[Brief description of the drawings]

FIG. 1 is a cross-sectional view illustrating a flow path switching mechanism of a directional switching valve according to a first embodiment of the present invention, showing a state where a flow path connection insertion portion is connected and a state where it is not connected.

FIG. 2 is an external view of FIG.

FIG. 3 is a cross-sectional view showing a flow path switching mechanism of a directional switching valve according to a second embodiment of the present invention, showing a state where a flow path connection insertion portion is connected and a state where it is not.

FIG. 4 is a partial cross-sectional view showing a flow path connecting part connected to a directional control valve according to a second embodiment of the present invention, which is different from the flow path connecting insertion part according to the second embodiment; It is.

FIG. 5 is a cross-sectional view showing a third embodiment of the flow path switching mechanism in the directional switching valve according to the present invention, and showing a state where the flow path connection insertion portion is connected and a state where it is not.

FIG. 6 is a partial cross-sectional view showing a flow path connection insertion portion connected to a directional control valve according to a third embodiment of the present invention, which is not connected to the directional control valve.

FIG. 7 is a schematic view showing an embodiment of a fire hydrant device provided with a direction switching valve of the present invention.

FIG. 8 is a flow diagram showing a conventional directional control valve.

[Explanation of symbols]

 REFERENCE SIGNS LIST 1 fire hydrant device 2 pressure regulating valve 3 fire hydrant valve 4 directional switching valve 5 fire extinguishing hose 6 nozzle 7 discharge inspection device 41 first outlet (first opening) 42 second outlet (second opening) 43 inlet ( (3rd opening) 45 1st internal passage 46 1st valve seat 47 2nd internal passage 48 2nd valve seat 49 valve element 50 elastic body (biasing means) 71 channel connection insertion part

Claims (2)

[Claims] 1. A fire hydrant device comprising: a fire hydrant valve, a fire extinguisher hose provided on a secondary side of the fire hydrant and having a nozzle at a tip, and a direction switching valve provided on a primary side of the fire extinguisher hose. The directional control valve has an outlet to which a discharge check device is connected, and normally forms a flow path from the hydrant valve to the fire extinguishing hose, and connects the discharge check device to the discharge outlet. When connecting to the fire hydrant device, the fire hydrant device is closed by switching from the fire hydrant valve to the discharge inspection device to form a flow path and closing the fire hose. 2. A first valve seat and a second valve seat are arranged to face each other, and a valve body movably provided therebetween is provided, and the valve body is seated on the second valve seat. A direction switching valve having biasing means for biasing, a flow path connection insertion portion for pushing a valve body of the direction switching valve in opposition to the biasing means, and a distal end engaged with the direction switching valve. There is a flow path connecting device including an external slide and an elastic body stronger than the urging means for pushing up the flow path connecting insertion portion from the external slide. By engaging the flow path connecting device with the direction switching valve, A flow path switching mechanism, wherein the valve element is separated from the second valve seat and is seated on the first valve seat.