JPH0932963A - Emergency shutoff valve with emergency opening function - Google Patents

Abstract

(57) Abstract: To have functions of two emergency shutoff valves and one emergency open valve. SOLUTION: By forming a partition wall 20 in the valve box 11 along the fluid flow direction, an inflow side flow path 21 and an outflow side flow path 22 are formed in the valve box 11, and the partition wall is formed. The valve body 14 is provided with an auxiliary partition wall 25 for opening and closing the communication port 24 formed at the valve body facing portion of the wall 20, and in the event of an emergency, the valve body 14 is brought into contact with the valve seat 12 to allow the flow. By closing the port 19, the central portions of the inflow side flow passage 21 and the outflow side flow passage 22 are blocked, and the closed state of the communication port 24 by the auxiliary partition wall 25 is released to close the inflow side flow passage 21. The upstream side and the downstream side of the outflow side flow path 22 are configured to communicate with each other.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an emergency shutoff valve having an emergency opening function having two flow paths.

[0002]

2. Description of the Related Art Conventionally, as an example of an earthquake-resistant water storage tank device, FIG.
There are the following. This is because the main water supply pipe 1 and the water storage tank 2 are communicated with each other by a pair of branch pipes 3 and 4, and both branch pipes 3 and 4 are provided with emergency shutoff valves 5 and 6 which are always open. An emergency opening valve 7 that is always closed is provided between both branch pipe connection portions of the main pipe 1.

In the above structure, the water main 1 is normally operated.
Both the emergency shutoff valves 5 and 6 are opened by the water pressure inside, and the emergency open valve 7 is closed, and the tap water flows from the upstream side of the water main 1 through one branch pipe 3 into the water tank 2. In addition, the tap water in the water storage tank 2 flows out to the downstream side of the water supply main 1 through the other branch pipe 4 so that the tap water in the water storage tank 2 does not become dead water. In an emergency such as the occurrence of an earthquake, the water pressure in the water mains 1 is reduced, so that both emergency shutoff valves 5 and 6 are shut off to secure a certain amount of water in the water tank 2. At the same time, the emergency opening valve 7 is opened to secure the water flow of the water mains 1 and respond to a fire or the like.

[0004]

In the above-mentioned conventional structure, the emergency shutoff valves 5 and 6 and the emergency open valve 7 are 1 in an emergency.
It has only the function of shutting off or opening one of the two flow paths. Therefore, the seismic tank device has two emergency shutoff valves 5, 6
And one emergency release valve 7 are required, and the number of parts is large,
The manufacturing cost is high, and maintenance and inspection are troublesome and expensive.

In view of the above problems, it is an object of the present invention to provide an emergency shutoff valve with an emergency open function having the functions of two emergency shutoff valves and one emergency open valve.

[0006]

In order to achieve the above object, the present invention urges a valve body formed in a central portion of a valve box for opening and closing a flow port of a valve seat toward the valve seat. And a valve body opening means for receiving the pressure on the upstream side of the valve seat to separate the valve body from the valve seat against the biasing means. By forming the partition wall along the flow direction, an inflow side flow path and an outflow side flow path are formed in the valve box, and the communication port formed at the valve body facing portion of the partition wall is opened and closed. The valve body is provided with an auxiliary partition wall for closing the flow port in an emergency when the pressure on the upstream side of the inflow side flow channel is lowered by bringing the valve body into contact with the valve seat by the urging means. As a result, the central portions of the inflow side flow path and the outflow side flow path are blocked, and the communication port of the auxiliary partition wall To release the chain state is characterized by being configured so as to communicate the downstream side of the outlet side flow passage and the upstream side of the inlet-side flow path.

The operation of the above-mentioned structure when the emergency shutoff valve with an emergency opening function of the present invention is used in a seismic resistant water storage tank device will be described. In normal times, the valve body opening receives the water pressure on the upstream side of the inflow side flow passage. Means for separating the valve body from the valve seat against the biasing means to open the flow port, and the communication port formed in the partition wall for partitioning the inflow side flow path and the outflow side flow path in the valve box. It is closed by an auxiliary partition wall provided in the body, and tap water flows from the upstream side of the water mains through the inflow side channel into the water storage tank, and the tap water in the water storage tank flows out. It is designed to prevent the tap water in the water storage tank from flowing to the downstream side of the mains through the pipe and becoming dead water.

In an emergency such as the occurrence of an earthquake, the water pressure in the mains of the water supply decreases, so the pressure received by the valve opening means decreases, and the urging means causes the valve element to contact the valve seat. Since the flow port is closed, the central portions of the inflow side flow path and the outflow side flow path are blocked, a certain amount of water can be secured in the water tank, and the communication port is closed by the auxiliary partition wall. Therefore, the upstream side of the inflow side flow path and the downstream side of the outflow side flow path are communicated with each other through the communication port, and the water flow of the water main can be secured to respond to a fire or the like.

In this case, the emergency shutoff valve with an emergency opening function of the present invention has the functions of two conventional emergency shutoff valves and one conventional emergency shutoff valve, and is provided between the water main and the water tank. With the interposition, the earthquake-resistant water storage tank device can be easily formed, the number of parts is small, the manufacturing cost is low, and the maintenance and inspection are not troublesome and costly.

[0010]

Embodiments of the present invention will be described below with reference to the drawings. FIG. 7 shows an earthquake-resistant water storage device formed by interposing an emergency shutoff valve 10 with an emergency opening function, which is an embodiment of the present invention, between a water main 1 and a water tank 2. As shown in FIGS. 1 to 5, the emergency shutoff valve 10 with an emergency opening function is integrated with a valve box 11, a valve seat 12 formed in a central portion of the valve box 11, and a central upper portion of the valve box 11. A valve body 14 that is vertically movable in the formed upper cylinder 13, a spring (biasing means) 15 that urges the valve body 14 downward, and a lower cylinder integrally formed in the lower central part of the valve box 11. A piston (valve body opening means) 18 that is vertically movable in 16 and is integrally connected to the valve body 14 via a valve rod 17.

The valve seat 12 partitions the central portion of the valve box 11 in the transverse direction, and has a flow port 19 formed in a horizontal portion 12a facing the valve body 14. 2 and 4
As shown in FIG. 2, the partition wall 20 is formed in the valve box 11 along the circulation direction of the tap water, so that the inflow passage 21 is formed.
And a flow path 22 on the outflow side, and a communication port 24 is formed by cutting out a portion of the partition wall 20 above the horizontal portion 12a of the valve seat 12, and the communication port 24 is hung on the valve body 14. It is configured to be closed by an auxiliary partition wall 25 provided, and in normal times, as shown by an arrow a in FIG. 2, tap water is stored from the water mains 1 through the inflow side flow passage 21 and the circulation port 19. The tap water flows into the tank 2, and tap water flows from the water tank 2 through the outflow-side channel 22 and the circulation port 19 into the water main 1, as indicated by an arrow b in FIG. Since the auxiliary partition wall 25 is smaller than the communication port 24, the communication port 24 cannot be completely closed, but in short, the water tank 2
There is no problem as long as it is possible to ensure that tap water inside is replaced.

As shown in FIG. 1, the lower cylinder 1
Reference numeral 6 is connected to the upstream side of the valve seat 12 of the inflow side flow passage 21 via the communication pipe 27.
Water flows into the lower cylinder 16 through the communication pipe 27 from the upstream side of the piston 1 due to the water pressure of the tap water.
8 is pushed up, whereby the valve body 14 is moved to the valve seat 12
And the communication port 2 by the auxiliary partition wall 25.
4 is closed (see FIGS. 1 and 3).

In FIG. 1, 28 is a spring pressing member having a height adjustable by bolts 30 fixed to a guide cylinder 29 on the upper cylinder 13, 31 is a striker provided at the upper end of the valve rod 17, and is a spring pressing member. By abutting on the upper limit detector 33 or the lower limit detector 34, which includes a limit switch provided on the support frame 32 fixed to the upper end of the member 28,
The upper and lower limits of the valve body 14 are detected.
Reference numeral 35 is a valve rod stopper screw provided on the upper end of the support frame 32, and 36 is a piston stopper screw provided on the bottom wall of the lower cylinder 16. Further, in FIG. 2, reference numeral 37 is a substantially T-shaped connecting pipe connected to both ends of the valve box 11, in which a partition wall 37 a continuous with the partition wall 20 is formed, and an inflow side flow passage 21 And ports 38a to 38d that communicate with the outflow side flow path 22 (see FIG. 5).

The emergency shutoff valve 10 with the emergency opening function is
It has the functions of two conventional emergency shutoff valves and one emergency open valve, and by interposing it between the water main 1 and the water tank 2, it is possible to easily form an earthquake-resistant water tank apparatus. it can.

In the above structure, in normal times, the tap water flowing from the main water pipe 1 into the inflow side flow passage 21 flows into the lower cylinder 16 through the communication pipe 27, and the water pressure pushes the piston 18 upward. As shown in FIGS. 1 and 3, the valve body 14 is separated from the valve seat 12 to open the flow port 19, and the communication port 24 is closed by the auxiliary partition wall 25. As shown by a, tap water flows from the upstream side of the water mains 1 into the water tank 2 through the inflow side flow path 21 and the flow port 19, and as shown by the arrow b in FIG. The tap water in 2 flows out to the downstream side of the water main 1 through the outflow-side flow path 22 and the flow port 19, and the tap water in the water tank 2 does not become dead water.

In an emergency such as the occurrence of an earthquake, the water pressure in the water mains 1 decreases and the pushing force of the piston 18 decreases. Therefore, as shown in FIG. It is pushed down and brought into contact with the horizontal portion 12a of the valve seat 12 to close the flow port 19. As a result, the central portions of the inflow side flow passage 21 and the outflow side flow passage 22 are blocked, and a certain amount of water can be secured in the water tank 2.
Since the closed state of the communication port 24 by the auxiliary partition wall 25 is released, the upstream side of the inflow side flow path 21 and the downstream side of the outflow side flow path 22 are communicated through the communication port 24, and the water mains 1
It is possible to secure the water flow and respond to a fire.

[0017]

According to the present invention, it has the functions of two conventional emergency shutoff valves and one conventional emergency open valve. For example, by interposing it between the water main and the water tank, the seismic resistance is improved. The water tank device can be easily formed, the number of parts is small, the manufacturing cost is low, and the maintenance and inspection are not troublesome and expensive.

[Brief description of drawings]

FIG. 1 is a vertical cross-sectional view of an emergency shutoff valve with an emergency opening function according to an embodiment of the present invention.

FIG. 2 is a view as viewed in the direction of arrows AA in FIG. 1;

FIG. 3 is a view taken in the direction of arrows BB in FIG. 1;

FIG. 4 is a view taken in the direction of arrows CC in FIG. 1;

FIG. 5 is a view as seen in the direction of the arrows D in FIG. 1;

FIG. 6 is a longitudinal sectional view of the valve in an emergency.

FIG. 7 is a schematic plan view showing a state where the valve is interposed between a water main and a water tank.

FIG. 8 is a schematic plan view showing a conventional earthquake-resistant water storage tank.

[Explanation of symbols]

 10 Emergency shutoff valve with emergency opening function 11 Valve box 12 Valve seat 14 Valve body 15 Spring (biasing means) 18 Piston (valve body opening means) 19 Flow port 20 Partition wall 21 Inflow side flow path 22 Outflow side flow path 24 Communication Mouth 25 auxiliary partition wall

Claims (1)

[Claims] 1. A biasing means for biasing a valve body for opening and closing a flow port of a valve seat formed in a central portion of a valve box toward the valve seat, and a pressure upstream of the valve seat. A valve body opening means for receiving the pressure to separate the valve body from the valve seat against the biasing means, and forming a partition wall in the valve box along a fluid flow direction to thereby form the valve. An inflow side flow path and an outflow side flow path are formed in the box, and an auxiliary partition wall for opening and closing the communication port formed at the valve body facing portion of the partition wall is provided in the valve body. In the event of an emergency when the pressure on the upstream side of the side flow passage decreases, the center of the inflow side flow passage and the outflow side flow passage is closed by bringing the valve body into contact with the valve seat by the biasing means to close the flow passage. And the release of the closed state of the communication port by the auxiliary partition wall, and the upstream side and the outflow side flow path of the inflow side flow path. An emergency shutoff valve with an emergency opening function, which is configured to communicate with the downstream side of the.