JPS5840064B2 - Automatic valve quick opening device - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a quick opening device for automatic valves used in dry sprinkler fire extinguishing equipment, etc., and particularly to a quick opening device suitable for pressurized release type automatic valves.

The automatic valve and its quick opening device used in conventional dry sprinkler fire extinguishing equipment are explained using Figure 1.
is a pressure reduction release type automatic valve that opens the clapper 51 when the secondary pressure falls below the primary pressure.

A conduit P1 from a pressurized fire extinguishing water supply source is connected to the primary side of the fire extinguisher, and a conduit P2 provided with closed sprinkler heads SP1 to SPn is connected to the secondary side. Pressurized air is supplied from the air supply source AP, and this air pressure causes the automatic valve ■.

The clapper 51 closes to prevent the primary side pressure water from flowing into the secondary side.

And automatic valve ■. A first chamber 53 to which the pressure in the pipe P2 is directly transmitted and a restriction pin 54 are inserted between the secondary side of the pipe and the intermediate chamber 52 for valve opening control. A second chamber 56 communicated through a pore 55 and an automatic valve ■.

A quick opening device RV having a valve body 57 for controlling communication between the secondary side of the intermediate chamber 52 and the intermediate chamber 52 is connected.

This quick opening device RV is used for sprinkler heads SP1-S.
When Pn is in the closed state, the air pressures in the first chamber 53 and the second chamber 56 are at the same pressure, and the valve body 57 is seated by the action of the spring 58, making it an automatic valve.

The communication between the secondary side of the intermediate chamber 52 and the intermediate chamber 52 is cut off.

If the resplinter head, for example SF3, opens due to a fire and the air pressure in the pipe P2 decreases, the first chamber 5 of the device RV
The pressure in the first chamber 53 in the second chamber 56 also decreases.
Due to the higher air pressure, the flam 59 and the flam base 60 descend, pushing down the valve body 57 to form an automatic valve (■).

The secondary side pressure air is discharged into the intermediate chamber 52.

This makes it an automatic valve■. The clapper 51 opens and the pipe P
The pressure water of No. 1 flows out into pipe P2 and sprinkler head SP.
Water is sprayed from 2.

By the way, in such a conventional system, the pressure water for fire extinguishing that flowed out to the secondary side when the automatic valve (o) was opened flows into the device RV through the pipe P3, and the pressure water that flowed into the device RV flows through the pore 5.
5 and flows into the second chamber 56.

The fire extinguishing water that has flowed into the second chamber 56 is not completely discharged from the chamber 56 even if the supply of pressurized water to the pipe P1 is stopped after the fire extinguishing operation is completed, and a portion remains inside the chamber 56. Put it away.

Furthermore, there is a high possibility that the pores 55 will be clogged with debris contained in the fire extinguishing water.

Therefore, after the fire extinguishing work is completed, the device RV must be disassembled and the device R
In addition to removing water remaining in the V, it is necessary to remove the restriction pin 54 from the pore 55 and clean the dust inside the pore 55, which is a very troublesome task.

In addition, since this device RV does not have the valve-opening function of the valve body 57, the primary side pressure water flows into the device R after the valve body 57 is opened.
When it flows into the V, the pressure closes the valve, so
It was unsuitable for controlling the pressurizing chamber, which is the valve opening control section of a pressurized release type automatic valve.

In view of the above points, the present invention provides a rapid opening device for an automatic valve including an accelerator that detects a pressure drop in pressurized gas on the secondary side of the automatic valve, and a valve opening control section for the automatic valve that operates under the control of the accelerator. The device is configured with a switching part that controls the valve to open and shuts off communication between the accelerator and the automatic valve's secondary side, making it possible to disassemble the device to remove residual water or clean up trash after fire extinguishing work is completed. The present invention provides a quick opening device for an automatic valve that does not require any additional steps and is suitable for a pressurized opening type automatic valve.

More specifically, the automatic valve quick opening device of the present invention includes:
The switching unit is comprised of a switching valve that normally blocks pressure fluid on the primary side of the automatic valve from flowing into the valve opening control unit of the automatic valve, and a secondary side of the automatic valve that is supplied through the accelerator. It consists of a valve body that is opened by pressurized gas, and a relay valve that communicates between the automatic valve secondary side and the accelerator when the switching valve is closed, and shuts off when the switching valve is open. A valve body that detects a pressure drop in the pressurized gas on the secondary side, and an automatic valve 2 that opens when this valve body detects a pressure drop.
It consists of a trigger valve that supplies pressurized gas supplied from the next side to the valve body of the switching part, and when the valve body of the accelerator detects a decrease in the pressure of the pressurized gas on the automatic valve secondary side, the trigger valve opens. Pressurized gas is applied to the valve body of the switching section, and the operation of this valve body opens the switching valve of the switching section and closes the relay valve, which operates the valve opening control section of the automatic valve. The valve opens and the fluid on the primary side flows out to the secondary side, and this secondary
This prevents fluid flowing out to the next side from flowing into the accelerator.

Hereinafter, one embodiment of the present invention will be explained with reference to FIG.
V is a quick opening device, AV is a pressurized opening type automatic valve, SP1~
SPn is a closed sprinkler head connected to the secondary side of automatic valve AV by pipe P2, and AP is the second side of automatic valve AV.
This is a pressurized air supply source such as a near compressor that supplies pressurized gas to the next side.

The quick opening device RV includes a switching section C■ for supplying the pressure water of the pipe P1 supplied to the primary side of the automatic valve AV to a pressurizing section PR for valve opening control of the automatic valve AV, and an automatic valve. It is composed of an accelerator AC that detects that the air pressure on the secondary side of the AV has decreased and operates the switching section C■.

The switching part C■ is provided with first to fifth chambers 1 to 5 from above, and the first chamber 1 is provided with a hole 6 connected to the secondary side of the automatic valve AV through a pipe P3. A relay valve 8 is provided to control the opening and closing of the hole 7 that communicates the first chamber 1 and the second chamber 2, and the second chamber 2 is provided with a drainage hole 9, and an on-off valve 1 is attached to this hole 9. It will be done.

The third chamber 3 is a velofram 10 to which a valve body 11 is attached.
It is divided into two chambers, a pressurized chamber and a back pressure chamber, and the lower back pressure chamber is opened to the atmosphere through a hole 12.

A pressurizing part P of an automatic valve AV is connected to the fourth chamber 4 via a pipe P4.
A hole 13 connected to R is provided, and the fifth chamber 5
The fifth chamber 5 is provided with a switching valve 15 that fits in the cylinder part 14 in a watertight manner.
The switching valve 15 is connected to the primary side of the automatic valve AV by a spring 16 that urges the switching valve 15 upward, a piston rod 17 for setting the switching valve 15 in a fitted state in the cylinder part 14, and a pipe P. A hole 18 is provided.

The relay valve 8, the valve body 11, and the switching valve 15 are configured such that when the switching valve 15 is fitted into the cylinder portion 14 and cuts off communication between the chambers 4 and 5, the valve body 11 moves the bellofram 10 upward. The push-up relay valve 8 is connected by a valve rod 19 to keep the hole T open.

The accelerator AC is arranged in the first to third chambers 21 to 23 from above.
is provided.

The first chamber 21 is provided with a valve port 24 that communicates with the second chamber 22 and is also provided with a trigger valve 25 that controls the opening and closing of the valve port 24 . It is seated in the valve port 24 by a spring 27 whose spring pressure is adjusted by the closing base 26 .

The second chamber 22 and the third chamber 23 are partitioned by a diaphragm 28 and a valve body 29 attached to the diaphragm 28, and the third chamber 23 has a valve stem 3 of the valve body 29 at the bottom.
A cylinder portion 31 into which the lower end of the valve stem 30 is slidably fitted is provided, and is filled with oil 32 as an air flow resistor so as to submerge the lower portion of the valve stem 30.

The trigger valve 25 and the valve body 29 are connected by a valve rod 33, and the valve rod 33 and the valve rod 30 communicate with the upper part of the second chamber 22 and the lower part filled with oil 32 of the third chamber 23. A hole 34 is provided.

Furthermore, the base body 26 is provided with a small-diameter atmosphere communication hole 35.

The switching section C■ and the accelerator AC configured in this way are composed of the second chamber 2 of the switching section C■ and the second chamber 2 of the accelerator AC.
2 through the communication hole 36, and the third chamber 3 of the switching section C■
and the first chamber 21 of the accelerator AC are connected to each other through a communication hole 37 to form a quick opening device RV.

Next, to explain the operation, normally the switching valve 15 of the switching part CV
is fitted into the cylinder portion 14 by the piston rod 17, and blocks the supply of the primary pressure water of the automatic valve AV to the pressurizing portion PR.

Further, the pressurized air supplied from the pressurized air supply source AP to the secondary side of the automatic valve AV is supplied to the first chamber 1 of the switching section C■ through the pipe P3, and is supplied to the first chamber 1. Pressurized air is supplied to the second chamber 22 of the accelerator AC through the hole 36.

Then, the pressurized air supplied to the second chamber 22 of the accelerator AC is supplied to the third chamber 23 through the hole 34, and as a result, the pressure in the second chamber 22 and the third chamber 23 become the same pressure, and the trigger is triggered by the pressure of the spring 27. A valve 25 is seated in the valve port 24;
The supply of pressurized air to the third chamber 3 of the switching section C■ is cut off.

When a sprinkler head, for example SF3, opens due to the occurrence of a fire, the pressurized air on the secondary side of the automatic valve AV is released from the sprinkler head SP2, and the pressure on the secondary side decreases.

As a result, the first and second switching parts C■ of the quick opening device RV
The pressure of the pressurized air in the chambers 1 and 2 of the accelerator AC and the second chamber 22 of the accelerator AC decreases through the conduit P3.

Due to the pressure drop in the second chamber 22 of the accelerator AC, the pressure in the third chamber 23, where the air pressure hardly decreases due to the resistance of the oil 32, becomes higher than the pressure in the second chamber 22, and the pressure in the third chamber 23 increases. As a result, the diaphragm 28, the valve body 29, and the trigger valve 25 rise against the pressure of the spring 27, opening the valve port 24.

The detection sensitivity of this change in air pressure is adjusted by operating the base 26 and adjusting the pressure of the spring 27.

When the valve port 24 is opened, the pressurized air remaining in the secondary side of the automatic valve AV and the chambers 1, 2, and 22 with reduced pressure flows into the third chamber 3 of the switching part CV through the hole 37.

As a result, pressure is generated in the third chamber 3, and the bellofram 10
The valve body 11 is pushed down, the relay valve 8 and the switching valve 15 are lowered together with the valve body 11, and the lowering of the relay valve 8 causes the chamber 1 to open.
Communication between the chambers 4 and 2 is cut off, and the cylinder portion 14 is opened by lowering the switching valve 15, so that the chambers 4 and 5 are communicated with each other.

Through communication between the fourth chamber 4 and the fifth chamber 5, pressure water for fire extinguishing on the primary side of the automatic valve AV supplied to the fifth chamber 5 is supplied to the fourth chamber 4.
and the automatic valve AV is supplied to the pressurizing part PR through the pipe P4.
The valve opens, and the pressure water on the primary side flows out to the secondary side and is discharged from the sprinkler head SP2.

On the other hand, the third chamber 3, where the pressure of the switching part c■ is generated, is opened to the atmosphere through the atmosphere communication hole 35 of the first chamber 21 of the accelerator AC, so the pressure in the third chamber 3 gradually decreases, and the valve body 11 tends to rise due to the water pressure and spring pressure acting on the switching valve 151ζ.

However, the pressure water that flowed out to the secondary side of automatic valve AV is pipe P3.
The flow flows into the first chamber 1 of the switching part C■ through the switch and acts on the relay valve 8, and due to the difference in pressure receiving area between the relay valve 8 and the switching valve 15, the relay valve 8 is in the closed state between the first chamber 1 and the second chamber 2. hold.

When restoring the quick opening device RV to its initial state, first stop the supply of pressure water on the primary side and open the drain valves (1) and (2).

As a result, the pressurizing part PR of the automatic valve AV and the second part of the switching valve CV
The water pressure in the chamber 2 and the fifth chamber 5 is released to the atmosphere, and the water pressure in the first chamber 1 is released to the atmosphere through the splinter head SP2.

Next, the piston rod 1T is operated to push up the switching valve 15 and make it fit into the cylinder portion 14.

As a result, the relay valve 8 is raised to communicate between the first chamber 1 and the second chamber 2, and the water in the first chamber 1 is drained from the second chamber 2 through the drain valve 1.

Then, pressurized air is supplied from the pressurized air supply source AP to the second chamber 22 of the accelerator AC through the first chamber of the switching part C■, and when the air pressure in the second chamber 22 becomes approximately equal to the air pressure in the third chamber 23, The trigger valve 25 is seated on the valve port 24 by the spring pressure of the spring 27, and the quick opening device RV returns to the monitoring state.

In the above embodiment, a case has been described in which a pressurized opening type automatic valve is controlled by the quick opening device, but a depressurizing opening type automatic valve as shown in FIG. 1 can also be controlled.

In this case, the hole 13 of the quick opening device RV is replaced with an automatic valve ■.

The hole 18 is connected to the intermediate chamber 52 which is the valve opening control part of the automatic valve ■.

It can be connected to the secondary side or the primary side of.

According to this invention, fluid such as fire extinguishing water remaining in the quick release device can be easily drained out of the device by simply operating the on-off valve ■1, and the fluid does not enter the accelerator AC, so extinguishing is extinguished. A quick opening device for an automatic valve, which does not require disassembling and cleaning the device after completion of the work, and which is suitable for controlling a pressurized opening type automatic valve, can be obtained.

[Brief explanation of drawings]

FIG. 1 is a vertical cross-sectional view of a conventional quick-opening device and a diagram explaining the connection relationship with an automatic valve. FIG. 2 is a vertical cross-sectional view of a quick-opening device according to the present invention and a diagram explaining the connection relationship with an automatic valve. It is. RV...quick opening device, C...switching section, AC...
・Accelerator, 1 to 5...1st to 5th chamber, 8...
・Relay valve, 10... bellofram, 11... valve body,
DESCRIPTION OF SYMBOLS 15... Switching valve, 16... Urging means, 17... Pushing up means, 21-23... 6th - 8th chamber, 25.
...Trigger valve, 26°27...Trigger valve biasing means,
28...Diaphragm, 29...Valve body, 30, 33
... Valve stem, 31... Cylindrical part, 32... Oil, 34... Hole, AV, ■o... Automatic valve, PR, 5
1... Valve opening control section, ■1... Drain valve.

Claims (1)

[Claims] 11. A first chamber connected to the secondary side of an automatic valve to which pressurized fluid is supplied to the primary side and pressurized gas is supplied to the secondary side, and in which a relay valve is housed; a second chamber that communicates with the first chamber and whose communication is controlled to be opened and closed by the relay valve; and a third chamber that is partitioned by a bellofram and a valve body attached to the bellofram and whose back pressure side is open to the atmosphere. and a fourth chamber connected to the valve opening control section of the automatic valve, which is connected to the primary side of the automatic valve and houses a switching valve, and the switching valve controls opening and closing of communication with the fourth chamber. The relay valve, the valve body, and the switching valve are arranged so that when the switching valve closes the communication between the fourth and fifth chambers by the biasing means, the relay valve and the second chamber, and the valve body is connected by a valve rod so as to push the bellofram up to a position above the third chamber.
A switching section is connected to the third chamber of the switching section and is provided with a trigger valve, and a fifth chamber is provided with a means for pushing up the switching valve. a seventh chamber which is connected to the second chamber and whose communication with the sixth chamber is controlled to be opened and closed by a trigger valve; and a diaphragm and a valve body attached to the diaphragm. The trigger valve and the valve body are connected by a valve stem whose lower end is configured to slide on a cylindrical part provided at the bottom of the eighth chamber. This valve stem has a seventh chamber and an eighth chamber.
A hole communicating with the lower part of the chamber is provided, the sixth chamber is provided with biasing means for seating the trigger valve in the communication hole, and the eighth chamber is provided with a biasing means so as to cover the hole of the valve stem. An automatic valve quick opening device consisting of an accelerator filled with oil and. 2. The automatic valve quick-opening device according to claim 1, wherein the biasing means for the trigger valve in the sixth chamber is configured such that the biasing pressure can be adjusted.