JP2006255101A - Manual starting device - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To inexpensively manufacture a manual starting device which is disposed at the terminal of piping for sensing of a simultaneous open valve installed at foam fire extinguish equipment, is closed normally and incorporates a relief mechanism for discharging an internal fluid when the pressure inside the piping for sensing is raised abnormally. <P>SOLUTION: The manual starting device has ball valve structure, and a small hole 22B communicated with a secondary side connection port 20 from a circulation path 22A of a valve element 22 being at a closing position is formed, so that the valve element 22 moves in the direction toward a secondary side when the pressure inside the piping 14 for sensing is raised abnormally. <P>COPYRIGHT: (C)2006,JPO&NCIPI

Description

The present invention relates to a manual activation device installed at the end of a foam fire extinguishing facility.

Automobiles contain highly flammable gasoline in tanks, and when an automobile burns, it cannot be extinguished with water. For this reason, in buildings where a large number of automobiles are placed, such as parking lots and automobile repair shops, foam extinguishing equipment is installed to spray fire extinguishing liquid in the form of foam when a fire breaks out.

The foam fire extinguishing equipment has an excellent feature that it can easily extinguish fires even if it is very flammable, such as gasoline, because it covers the combustion products with foam to block oxygen.

In general, foam extinguishing equipment is a stock tank filled with foam stock solution, a water storage tank in which water is stored, a pressure tank that applies constant pressure to the primary piping, a mixer that mixes the stock solution and water, and a mixer. Flowing water detection device that detects a fire when mixed fire extinguishing liquid passes and issues an alarm or operates ancillary equipment of foam fire extinguishing equipment, simultaneous open valve that opens and closes the valve at the time of fire and inspection, fire It consists of a closed sprinkler head that senses and opens the valves of the simultaneous opening valve, a foam head that sprays fire extinguishing liquid in the form of foam, and a manual start valve that allows the fire extinguishing liquid to flow out during inspection.

In the foam fire extinguishing equipment, the primary side pipe from the water storage tank, stock solution tank, mixer, flowing water detector to the simultaneous open valve is filled with fire extinguishing liquid, but in the secondary side pipe from the simultaneous open valve to the foam head Is not filled with fire extinguishing liquid. The control room connected to the primary side chamber of the simultaneous opening valve is connected to a sensing pipe fitted with a fire detecting closed sprinkler head, and the sensing pipe is also filled with a fire extinguishing liquid.

When a fire breaks out in a building with foam fire extinguishing equipment, the fire-detecting closed sprinkler head attached near the flame is activated. Then, since the fire extinguishing liquid filled in the sensing pipe flows out from the closed sprinkler head, the pressure in the sensing pipe decreases, and at the same time the piston valve in the simultaneous release valve is opened by this pressure drop. The water tank pump is activated by the command of the pressure switch installed in the pressure tank. When the water pumped into the mixer flows into the mixer, it is drawn into the momentum of the water, and the stock solution in the stock tank also flows into the mixer. The fire extinguisher has a concentration suitable for making bubbles by mixing with the mixer. Become a liquid. This fire extinguishing liquid further flows into the secondary pipe through the simultaneous open valve from the flowing water detection device, and is sprayed from the foam head. When the fire extinguishing liquid is sprayed from the foam head, the foam head entrains air to create foam, and the foam covers the fire source of the fire to suffocate and extinguish the fire.

By the way, in the foam fire extinguishing equipment, the closed sprinkler head for fire detection and the simultaneous release valve are designed with sufficient consideration of the safety factor, and can withstand pressures of 3 times the normal pressure. . However, if the pressure in the piping exceeds 3 MPa, the design safety factor will be exceeded, and there is a risk of damaging the closed sprinkler head for fire detection, simultaneous open valves, piping, and other incidental equipment. is there.

The reason for the abnormally high pressure inside the sensing pipe in the foam fire extinguishing system installed in the parking lot is that there is no ceiling in the parking lot and the sensing pipe is laid near the roof, so the roof is exposed to direct sunlight in midsummer. When the sensor is heated, the sensing pipe is heated, so that the fire extinguishing liquid in the pipe is thermally expanded. Then, in the pipe having a small volume, the pressure in the pipe becomes 3 to 5 times the normal pressure even if the extinguishing liquid is slightly expanded.

In view of such problems, the applicant of the present invention has proposed an invention in which pressure is discharged from the end of the sensing pipe when the inside of the pipe or the simultaneous open valve becomes a high pressure (see Patent Document 1). According to the invention of Patent Document 1, a bypass flow passage is installed in a manual start valve attached to the end of a sensing pipe, and a relief valve capable of causing an abnormally high pressure extinguishing liquid to flow out is installed in the bypass flow passage. When the pressure in the sensing pipe is abnormally increased, the fluid in the pipe is discharged from the relief valve to the drain pipe. As another embodiment, there is a manual start valve in which a bypass is formed and a relief valve is installed on the bypass, and there is an integrated structure and a compact configuration.

JP-A-8-89594 (page 3-4, FIG. 2)

The manual start valve with a built-in relief valve described in Patent Document 1 has a problem of high manufacturing cost and has not been implemented at present. In view of this, an object of the present invention is to make it possible to inexpensively manufacture a manual start valve that can discharge the internal fluid when the pressure in the sensing pipe is abnormally increased.

In order to achieve the above object, the invention according to claim 1 is a manual activation device provided at the end of a sensing pipe of a simultaneous opening valve installed in a foam fire extinguishing equipment, and is always closed. In the manual activation device with a built-in relief mechanism that discharges the internal fluid when the internal pressure rises abnormally, the manual activation device has a ball valve structure, and the secondary side connection port from the ball flow path in the closed position Is a manual starter that has a structure in which a ball moves in the secondary direction when the inside of the sensing pipe is abnormally pressurized.

The invention according to claim 2 is the manual activation device according to claim 1, wherein in the manual activation device, the ball is pressed by a projectile from the secondary side toward the primary side.

The invention according to claim 3 is the manual activation device according to claim 2, wherein the projectile is a disc spring.

The invention according to claim 4 is characterized in that the manual activation device is provided with adjusting means for adjusting the force acting on the ball from the projectile. It is.

The invention according to claim 5 is a manual activation device that is provided at the end of the sensing pipe of the simultaneous opening valve installed in the foam fire extinguishing equipment and is normally closed. When the inside of the sensing pipe is abnormally pressurized, In a manual starter with a built-in relief mechanism that discharges fluid, the manual starter has a ball valve structure, and a small hole that communicates from the ball flow path in the closed position to the secondary side connection port is drilled. The manual activation device is provided with a relief mechanism that is opened when the pressure inside the sensing pipe is abnormally increased at a position facing the small hole.

According to the first aspect of the present invention, when the pressure in the sensing pipe is abnormally increased, the ball moves in the secondary direction, so that a gap is generated between the ball and the ball seat on the primary side. The fluid in the sensing pipe flows and flows out from the small hole continuing to the secondary side connection port through the ball flow path to the drain pipe connected to the secondary side connection port.

According to the invention described in claim 2, when the ball is pressed from the secondary side to the primary side by the projectile, and when the pressure in the sensing pipe is abnormally increased as described above, The projectile is compressed by the pressure of and the ball moves in the secondary direction. When the fluid in the sensing pipe flows out to the drain pipe by the movement of the ball and the pressure in the sensing pipe drops, the ball returns to the original position by the projectile.

According to the invention described in claim 3, by using a disc spring as the elastic body, a force is applied uniformly in an annular shape, so that the sealing performance is stabilized. Further, the manual activation device can be configured in a compact manner.

According to the fourth aspect of the present invention, by providing the adjusting means for adjusting the force acting on the ball from the projectile, the projectile can be adapted to the environment and situation of the building where the foam fire extinguishing equipment is installed. It is possible to arbitrarily set the force acting on the ball from the body.

According to the fifth aspect of the present invention, since the relief mechanism is installed on the ball, the manual activation device can be further compacted.

Embodiment 1 of the present invention will be described below with reference to FIGS. FIG. 1 is a piping system diagram of a foam fire-extinguishing equipment, FIG. 2 is a cross-sectional view of a manual start valve of Example 1, and FIG. 3 is a cross-sectional view of a manual start valve when the pressure inside the sensing pipe is abnormally increased.

In the foam fire extinguishing equipment shown in FIG. 1, a water tank 1 and a pump 2 are connected to a mixer 3, and a pressure tank 4 is connected in the middle thereof. A stock solution tank 5 is connected to the mixer 3. Further, the mixer 3 is connected to the flowing water detection device 6, and the flowing water detection device 6 is connected to the simultaneous release valve 7. From the water tank 1 to the simultaneous opening valve 7 is a primary side pipe 8.

The simultaneous release valve 7 is internally partitioned into a primary side chamber 9 and a secondary side chamber 10, and a piston valve 11 is installed so as to be movable up and down in the primary side chamber of the partitioned opening. The primary side chamber 9 is connected to the above-mentioned primary side pipe 8, and the control chamber 12 communicating with the primary side chamber is connected to a sensing pipe 14 having a large number of sensing closed sprinkler heads 13.

A closing valve 15 is connected to the secondary side chamber 10 of the simultaneous opening valve 7, and a secondary side pipe 17 to which more foam heads 16 are attached than the closing type sprinkler head is connected to the end thereof.

At the end of the sensing pipe 14, a manual start valve 18 is attached which can flow out the fire extinguishing liquid substantially the same as that of one closed sprinkler head when opened.

The manual start valve 18 shown in FIG. 2 is normally closed, the primary side connection port 19 is connected to the sensing pipe 14, and the secondary side connection port 20 is connected to the drain pipe 21.

The inside of the manual start valve 18 has a ball valve structure, a ball-shaped valve body 22 is installed, and the flow passage 22A drilled in the valve body 22 is always connected to the primary side connection port 19 and the secondary side. It is not in communication with the connection port 20. Also, a small hole 22B is formed at a right angle from the secondary side connection port 19 side to the flow passage 22A.

Ball seats 23 and 24 are respectively installed between the valve body 22 and the connection ports 19 and 20. A disc spring 25 and a ball seat receiver 26 are interposed between the secondary connection port 20 and the ball seat 24.

The force that the disc spring 25 acts on the valve body 22 can be adjusted by the tightening degree of the screw portion 27 to which the two valve boxes are connected. The disc spring 25 is adapted to the environment of the building where the foam fire extinguishing equipment is installed. The force acting on the valve body 22 can be changed.

Then, the effect | action of the manual start valve of Example 1 is demonstrated.

The manual start valve 18 is always closed as described above, the flow passage 22A of the valve body 22 is positioned perpendicular to the primary side connection port 19 and the secondary side connection port 20, and the valve body. Since 22 is pressed against the ball seat 23 by the disc spring 25, the fire extinguishing liquid in the sensing pipe 14 does not flow to the drainage pipe 21 on the secondary side.

When the fire extinguishing liquid in the sensing pipe 14 is increased in pressure due to an increase in temperature and the pressure of the fire extinguishing liquid exceeds the force acting on the disc spring 25, the disc spring 25 is crushed and the valve disc 22, the ball sheet 24, and the ball sheet receiver 26 move in the secondary direction.

Due to the movement of the valve body 22, a gap is formed between the valve body 22 and the ball seat 23 installed on the primary side, and the fire extinguishing liquid in the sensing pipe 14 flows into the gap, and the circulation of the valve body 22. After passing through the small hole 22 </ b> B from the path 22 </ b> A, it flows out to the secondary side connection port 20 and is discharged to the drain pipe 21.

When the fire extinguishing liquid in the sensing pipe 14 is discharged and the force acting on the valve body 22 by the pressure of the fire extinguishing liquid becomes smaller than the force acting on the disc spring 25, the valve body 22 returns to its original position and the ball seat 23 And the discharge of the fire extinguishing liquid is stopped.

Next, Example 2 will be described with reference to FIG. FIG. 4 is a cross-sectional view of the manual start valve according to the second embodiment. In addition, in Example 2, the part which has the same structure as Example 1 attaches | subjects the same code | symbol, and abbreviate | omits description.

The difference between the second embodiment and the first embodiment is that the valve body 22 is provided with a relief mechanism that is opened when the fire extinguishing liquid inside the sensing pipe 14 is abnormally pressurized. A relief mechanism 30 is provided at a position facing the small hole 22B that intersects the flow passage 22A of the valve body 22 at a right angle.

The relief mechanism 30 includes a valve body 31, a rod 32, and a disc spring 33.

A hole 34 is formed at a position facing the small hole 22 </ b> B of the valve body 22, and a rod 32 is installed through the hole 34. A valve body 31 is fixed to the end of the rod 32 on the flow passage 22A side. The opposite end is a flange 35 so that the relief mechanism 30 cannot be removed from the hole 34.

A disc spring 33 is interposed between the hole 34 and the flange 35, and the disc 31 is brought into close contact with the flow passage 22 </ b> A by the disc spring 33 and the hole 34 is closed. A sealing member may be installed between the valve body 31 and the flow passage 22A.

Since the operation of the second embodiment is the same as that of the first embodiment, the description thereof is omitted.

The manual starter of the present invention can be applied to a sprinkler fire extinguishing equipment in addition to a foam fire extinguishing equipment. It can also be used for piping equipment other than fire extinguishing equipment.

Piping system diagram of foam fire extinguishing equipment Sectional drawing of the manual starting apparatus of Example 1 In the manual starter shown in FIG. Manual starting device of embodiment 2

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 Water tank 2 Pump 3 Mixer 4 Pressure tank 5 Stock solution tank 6 Flowing water detection apparatus 7 Simultaneous open valve 14 Detection piping 18 Manual starting valve 22 Valve body 23, 24 Ball seat 25 Belleville spring 30 Relief mechanism

Claims (5)

This is a manual starter that is installed at the end of the sensing pipe of the simultaneous open valve installed in the foam fire extinguishing equipment, and is always closed, and has a built-in relief mechanism that discharges the internal fluid when the pressure inside the sensing pipe is abnormally increased. In the manual starter, the manual starter has a ball valve structure, and a small hole communicating from the ball flow passage in the closed position to the secondary side connection port is formed, and the inside of the sensing pipe is A manual activation device characterized by having a structure in which a ball moves in a secondary direction when abnormal pressure is increased.
2. The manual activation device according to claim 1, wherein the ball is pressed by a projectile from the secondary side toward the primary side.
3. The manual activation device according to claim 2, wherein the projectile is a disc spring.
The manual activation device according to claim 2 or 3, wherein the manual activation device is provided with an adjusting means for adjusting a force acting on the ball from the projectile.
This is a manual starter that is installed at the end of the sensing pipe of the simultaneous open valve installed in the foam fire extinguishing equipment, and is always closed, and has a built-in relief mechanism that discharges the internal fluid when the pressure inside the sensing pipe is abnormally increased. In the manual activation device, the manual activation device has a ball valve structure, and has a small hole communicating with the secondary side connection port from the flow path of the ball in the closed position, and is opposed to the small hole. A manual starter characterized in that a relief mechanism that is opened when the inside of the sensing pipe is abnormally boosted is installed at a position to be operated.

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