JP2003236010A - Automatic valve system for tunnel - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide an automatic valve system for tunnels which can reduce height size while achieving normal operation of automatic drain valves. <P>SOLUTION: In the automatic valve system for tunnels provided with an automatic valve (10) which has a pressure adjusting mechanism and is installed in a tunnel, a test water control value (11) for stopping the supply of pressurized fire extinguishing water to the side of a water spray head at each test, a test discharge valve (15) for making the fire extinguishing water flow to a test passage and the automatic drain valve (16) which is installed vertical to a road surface and opened normally or closed at each test. The automatic valve (10) is placed sideways to make the inflow or the outflow of the pressurized water almost parallel with the road surface relative to the automatic valve while the test discharge valve (15) is built as a three-way valve and disposed at a branch off point to the water drain path from the test passage and the automatic drain valve (16) is directly mounted vertically. <P>COPYRIGHT: (C)2003,JPO

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a tunnel automatic valve for supplying water for pressure-extinguishing fire to a water spray head installed in a tunnel during operation and spraying water for test without spraying from the head during inspection. The present invention relates to a device, and more particularly to a tunnel automatic valve device capable of reducing the size of the automatic valve device in the direction perpendicular to the road surface.

[0002]

2. Description of the Related Art Conventionally, as an automatic valve device used in a water spray facility in a tunnel, for example, there is one shown in FIG. 6 (see Japanese Patent Laid-Open No. 2000-120898).

The automatic tunnel valve device 100 includes an automatic valve 110 for adjusting the pressure of pressurized water for extinguishing a fire, and this automatic valve 11
0, which is arranged on the secondary side of 0 and stops the supply of pressurized water to the water spray head side during the test, a test water control valve 111, an automatic valve 11
A pressure adjusting valve 112 that generates a control pressure of 0, a pilot valve 113 that supplies the primary pressure of the automatic valve to the pressure adjusting valve to adjust the secondary pressure of the automatic valve, and is arranged in parallel with the pilot valve. The manual start valve 114, which is switched to the first position during steady state, discharges the control pressure applied to the water control control mechanism of the test water control valve to the drain side to open it, and is switched to the second position during inspection to automatically switch A test water discharge valve 115 that allows the fire extinguishing water to flow by connecting the secondary side of the valve to the drain, and an automatic drain valve 11 that automatically drains the water in the test flow path at the end of the test.
6 and a pressure switch 117. Note that reference numeral 1 in the figure
18 is a stop valve and 119 is an orifice.

The automatic valve device 100 operates as follows during inspection. Actually, the person in charge of maintenance and inspection goes to the equipment installation location and performs the following procedure. (1) Turn the handle of the test water control valve 111 so that it is fully closed to prevent water from being discharged from the head. (2) Turn the lever of the test water discharge valve to make it fully open. (3) Whether the pilot valve 113 is opened remotely or the manual start valve 114 is opened, primary pressurized water is supplied to the pressure adjustment valve 112 to start the automatic valve 110. When the automatic valve 110 is activated, the valve body is opened so that pressurized water flows from the test water discharge valve 115 to the drain, and test water discharge is performed. At this time, the valve body of the automatic valve 110 is opened and closed by the pressure adjusting valve 112 so as to adjust the secondary pressure to the specified pressure. (4) When the test water discharge due to the activation of the automatic valve 110 can be confirmed from the ON signal of the pressure switch 117, the pilot valve 113 is closed and the automatic valve 110 is fully closed. (5) Subsequently, the test water discharge valve 115 is closed and the test water control valve 111 is opened to finish the inspection. At this time, the fire extinguishing water in the test channel between the secondary side of the automatic valve 110 and the test water discharge valve 115 is drained to the drain by opening the automatic drain valve 116.

And, such an automatic valve device 100 is
As shown in FIGS. 6 (1) and 6 (2), the automatic valve 110 is arranged in the vertical direction, and the inflow and outflow pipes for pressurized fire extinguishing water are connected to the road surface (G).
A so-called vertical type, which is arranged perpendicular to L), is generally used.

[0006]

However, in such a vertical type automatic valve, although the dimension in the width direction can be made small, the dimension in the height direction becomes large. Therefore, there is a problem that the automatic valve device cannot be installed if the installation position is restricted in the height direction. Therefore, it is possible to reduce the height of the device by installing the automatic valve horizontally.

However, when the vertical automatic valve device described above is simply placed horizontally, the automatic drain valve, which is a component of the automatic valve device, is also placed horizontally, and the original function of the automatic drain valve is reduced. I can't do it.

This is because the automatic drain valve 116 has the structure shown in FIG. In FIG. 4, 120 is a cylindrical case, 121 is a steel ball as a valve element that is vertically movable in the case 120, 122 is a valve seat, and 123 is a spring 124 that is urged upward by a steel ball 121. Shows the rod pushing up.

In the automatic drain valve 116, the steel ball 121 is pushed up by the rod 123 and separated from the valve seat 122 when the predetermined inflowing water from the flowing direction (upper part in the figure) is lower than the predetermined pressure. The water flows through the space 125 between the steel ball 121 and the case 120 (solid line in FIG. 4).

On the other hand, when a predetermined amount of water flowing in from the flowing direction exceeds a predetermined pressure, the steel ball 121 pushes down the rod 123 to contact the valve seat 122 and the water stops flowing (phantom line in FIG. 4).

This operation is performed smoothly when the automatic drain valve 116 is arranged vertically and the steel ball 121 can move in the case 120 without touching the case. However, when the automatic drain valve 116 is arranged in the lateral direction, the steel ball 121 comes into contact with or is caught on the side surface in the case 120, and thus cannot move smoothly. For this reason, the above-mentioned action may not be performed.

The present invention has been made in view of the above circumstances, and an object of the present invention is to provide a tunnel automatic valve device capable of reducing the height dimension and operating the automatic drain valve normally.

[0013]

In order to achieve this object, the present invention arranges the automatic valve device laterally in a tunnel automatic valve device. That is, the present invention is arranged in a tunnel, and an automatic valve provided with a pressure adjusting mechanism for adjusting a secondary pressure to a specified pressure by receiving a control pressure by the pressure adjusting valve, and arranged on the secondary side of the automatic valve. , A test water control valve that stops the supply of pressurized fire fighting water to the water spray head side during the test, and prohibits draining the water pressure applied to the automatic valve that is switched to the first position during steady state to the drain side, At the time of inspection, in a test water discharge valve that switches to the second position and flows the fire extinguishing water to the test flow path that connects the secondary side of the automatic valve to the drain, and in the drainage path that branches from the test flow path and connects to the drain. It is provided with a spherical body as a valve body and is provided in a vertical direction with respect to the road surface so that the spherical body moves in the vertical direction. Prepared water spray head with pressurized water In an automatic tunnel valve device for supplying and spraying, the automatic valve is laid horizontally so that the inflow / outflow direction of the pressurized water to and from the automatic valve is substantially parallel to the road surface, and the automatic drain valve is arranged vertically. And

In such a tunnel automatic valve device, since the automatic valve which is originally vertically long is oriented horizontally, the vertical dimension of the tunnel automatic valve device can be made small. Further, since the automatic drain valve is provided in the vertical direction, the function of the automatic drain valve device is fully exerted.

Further, the tunnel automatic valve device of the present invention is characterized in that the test water discharge valve is constructed as a three-way switching valve and is arranged at a branch point from the test flow path to the drainage path. According to such a tunnel automatic valve device, it is not necessary to dispose the test water discharge valve in the test flow path that is vertically piped, and the size in the height direction of the tunnel automatic valve device can be reduced.

Further, the tunnel automatic valve device of the present invention is
The automatic drain valve is directly connected to the test water discharge valve. According to such a tunnel automatic valve device, the dimension of the drainage channel provided with the automatic drainage valve can be set to the shortest length, and the dimension in the height direction of the tunnel automatic valve device can be made small. With this configuration, the automatic valve device can be made small in the height direction.

[0017]

BEST MODE FOR CARRYING OUT THE INVENTION Embodiments of the present invention will be described below with reference to the accompanying drawings. 1 to 4 show an embodiment for carrying out the invention. FIG. 1 is a front view of a tunnel automatic valve device according to this embodiment, FIG. 2 is a piping diagram of the tunnel automatic valve device shown in FIG. 1, and FIG. Is an operation explanatory view, and FIG. 4 is a view showing a structure of an automatic drain valve.

In this example, as shown in FIG. 1, in the automatic tunnel valve device, a feed pipe 21 for pressurized fire fighting water and a feed pipe 22 for the spray head are arranged substantially horizontally with respect to the road surface (GL).
The automatic valve 10 is also placed horizontally. And in this example,
As shown in FIGS. 1 and 2, a test flow path 23 for flowing fire-extinguishing water is provided in the drain during the test, and a drain path 24 that branches downward from the test flow path 23 and communicates with the drain is provided.

In this example, a three-way switching valve is provided as the test water discharge valve 15 at the T-shaped branch point between the test flow path 23 and the drainage path 24. This three-way switching valve is preferably a ball valve. Therefore, in this example, it is not necessary to dispose the test water discharge valve in the test flow path that is piped in the vertical direction, and the size of the automatic tunnel valve device in the height direction can be reduced.

In this example, the automatic drain valve 16 is directly attached to the downward port of the three-way switching valve. As a result, the dimension of the drainage channel provided with the automatic drainage valve can be set to the shortest, and the dimension in the height direction of the tunnel automatic valve device can be made small. The structure of this automatic drain valve is as shown in FIG. 4, and is the same as that used in the conventional example.

Further, in this embodiment, the tunnel automatic valve device includes, as shown in FIG. 2, a test water control valve 11, a pressure regulating valve 12, a pilot valve 13, and a manual start valve 14 arranged in parallel with the pilot valve. , Pressure switch 17, stop valve 1
8 and an orifice 19 are provided. The arrangement relationship of these members is the same as that shown in the conventional example, but in this example, the respective members are arranged and piped so that the device dimension in the height direction becomes as small as possible, as shown in FIG.

Next, the operation of the above embodiment will be described. The basic operation of the test is the operation (1) to the conventional example described above.
It is almost the same as (5), but in this example, the test water discharge valve 15
The operation when activating is different from the conventional example. Note that the test water discharge valve 15 is normally located at a position where the automatic valve 10 and the automatic drain valve 16 communicate with each other (FIG. 3A). Therefore, the pressurized water does not flow into the test flow path 23, the automatic drain valve 16 receives the water pressure and is in the closed state (the phantom line in FIG. 4), and the pressurized water does not flow out from the drain passage 24.

The following operations are performed during the test. (1) Turn the handle of the test water control valve 11 to fully close it so that water will not be discharged from the head. (2) Turn the lever of the test water discharge valve 15 to the fully opened state (Fig. 3 (b)). This allows pressurized water to flow into the test flow path 23. Therefore, pressure is applied to the test flow path 23, the automatic drain valve 16 is closed by receiving water pressure (phantom line in FIG. 4), and pressurized water does not flow out from the drain path 24. (3) Whether the pilot valve 113 is opened remotely or the manual start valve 14 is opened, primary pressurized water is supplied to the pressure adjusting valve 12 to start the automatic valve 10. When the automatic valve 10 is activated,
When the valve body opens, pressurized water flows from the test water discharge valve 15 to the drain, and test water discharge is performed. At this time, the pressure regulating valve 12
Thus, the valve body of the automatic valve 10 is opened and closed so as to adjust the secondary pressure to the specified pressure. (4) When the test water discharge due to the activation of the automatic valve 10 can be confirmed from the ON signal of the pressure switch 17, the pilot valve 13
Is closed and the automatic valve 10 is returned to the fully closed state. (5) Then, the test water discharge valve 15 is closed (FIG. 3B), the test water control valve 11 is opened, and the inspection is completed. Then, the test water discharge valve 15 comes to a position (FIG. 3A) where the automatic valve 10 and the automatic drain valve 16 communicate with each other. For this reason, no pressure is applied to the test flow path 23, the automatic drain valve 16 does not receive water pressure and is in an open state (solid line in FIG. 4), and there are from the secondary side of the automatic valve 10 to the test flow path 23 and the drain path 24. Fire extinguishing water is drained to the drain.

Therefore, in the tunnel automatic valve device according to this embodiment, the vertical dimension of the tunnel automatic valve device can be made small, and the function of the automatic drain valve can be sufficiently exhibited.

The tunnel automatic valve device of the present invention is not limited to the above-mentioned embodiment, and it goes without saying that various modifications can be made without departing from the scope of the present invention.

[0026]

As described above, according to the tunnel automatic valve device of the present invention, even in the automatic valve device having the same function, the size of the device in the height direction can be made small and the height is low. Can be set in the storage box.

That is, in the tunnel automatic valve device according to the present invention, since the automatic valve which is originally vertically long is oriented horizontally, it is possible to reduce the vertical dimension of the tunnel automatic valve device. In addition, since the automatic drain valve is provided in the vertical direction, the function of the automatic drain valve device is fully exerted.

Further, according to the tunnel automatic valve device in which the test water discharge valve is configured as a three-way switching valve and is arranged at the branch point from the test flow path to the drainage path, the test flow path is vertically installed in the test flow path. It is not necessary to dispose a test water discharge valve, and the size in the height direction of the automatic tunnel valve device can be reduced.

Further, according to the tunnel automatic valve device in which the automatic drain valve is directly connected to the test water discharge valve, the dimension of the drainage channel provided with the automatic drain valve can be set to the shortest, and the dimension in the height direction of the tunnel automatic valve device is small. Can be something.

[Brief description of drawings]

FIG. 1 is a front view showing an embodiment of an automatic tunnel valve device according to the present invention.

2 is a piping diagram of the tunnel automatic valve device shown in FIG. 1. FIG.

FIG. 3 is a diagram showing an operating state of the tunnel automatic valve device shown in FIG. 1.

FIG. 4 is a cross-sectional view showing the configuration of an automatic drain valve used in the present invention.

FIG. 5 is a piping diagram of a conventional tunnel automatic valve device.

FIG. 6 is a view showing a conventional tunnel automatic valve device,
(A) is a front view and (b) is a side view.

[Explanation of symbols]

10 Automatic valve 11 Test water valve 12 Pressure control valve 13 Pilot valve 14 Manual start valve 15 Test water discharge valve 16 Automatic drain valve 17 Pressure switch 18 stop valve 19 Orifice 21 Inlet pipe 22 Delivery pipe 23 Test flow path 24 drainage channels

Claims (3)

[Claims] 1. An automatic valve provided in a tunnel, the automatic valve having a pressure adjusting mechanism for adjusting a secondary pressure to a prescribed pressure by receiving a control pressure from the pressure adjusting valve; and an automatic valve arranged on the secondary side of the automatic valve. A test water control valve that stops the supply of pressurized water to the water spray head side during the test, and prohibition of discharging the water pressure applied to the automatic valve to the drain side when it is switched to the 1st position during steady operation, and the 2nd time during the inspection.
A test water discharge valve that is switched to a position to flow fire extinguishing water to a test flow path that communicates the secondary side of the automatic valve with the drain, and a valve provided in a drainage path that branches from the test flow path and communicates with the drain. A water spray head is provided with an automatic drain valve which uses a sphere as a body and is provided in a vertical direction with respect to the road surface so that the sphere moves vertically, and is in an open state during a steady state and closed during a test. In a tunnel automatic valve device for supplying pressurized fire extinguishing water to and spraying it, the automatic valve is placed horizontally and the inflow and outflow direction of the pressurized water to the automatic valve is substantially parallel to the road surface, and the automatic drain valve is set in the vertical direction. The automatic valve device for tunnels, which is characterized in that 2. The tunnel automatic valve device according to claim 1, wherein the test water discharge valve is configured as a three-way switching valve, and is arranged at a branch point from the test flow path to the drainage path. 3. The tunnel automatic valve device according to claim 2, wherein an automatic drain valve is directly connected to the test water discharge valve.