JPS59125571A - Dry automatic fire extinguishing apparatus - Google Patents

Abstract

(57) [Summary] This bulletin contains application data before electronic filing, so abstract data is not recorded.

Description

Detailed Description of the Invention The present invention is a dry automatic fire extinguishing system in which the primary side is filled with water pressure and the secondary side is filled with compressed air. The present invention relates to an improvement in a fire extinguishing device that extinguishes a fire by discharging water from the secondary side with a radiation head through the opening of a valve body.

(Background technology) Conventionally, fire extinguishing systems that fill the primary side with water pressure and the secondary side with compressed air, and discharge water from the radiating head to extinguish the fire when the air pressure drops when a fire occurs, are dry type and have a secondary side filled with compressed air. It is widely used for the purpose of preventing head freezing.

Specifically, in such a fire extinguishing bag N, a valve that is opened and closed by external means, such as a check valve, is used as a valve that opens and closes the primary side and the secondary side.

However, in the case of such a valve, not only can it be opened and closed only by external means, but it also does not open and close smoothly.
There was no guarantee that the facility would be opened only when necessary, such as in the event of a fire.

(Problem to be solved/Technical objective) In order to solve the above-mentioned problems in dry fire extinguishing systems, the present invention creates a pressure difference between air pressure and water pressure by using a valve that is opened and closed by an external means such as a check valve. In this way, the above-mentioned problem is solved by ensuring the opening and closing of the valve, especially the seal on the primary side, thereby preventing the valve from being opened inadvertently.

(Disclosure of the present invention) That is, the present invention constitutes a simultaneous release valve by a pneumatic chamber A filled with compressed air, one fire chamber B filled with water pressure, and two coal chambers C on the radiation side, and the pneumatic chamber A A valve body is provided between the air pressure chamber A above the valve body and the coal chamber B below the valve body.
By creating a pressure difference with firebox B to maintain balance, the valve body is forced to press strongly against the valve seat on the side of firebox B, so primary chamber B is always reliably sealed by the valve body. Therefore, the first firebox B side will not be opened inadvertently except in the event of a fire.

(Effects) As described above, the present invention has a structure in which the valve opening is closed by strongly sealing the valve element to the valve seat on the B side of the first firebox due to the pressure difference between the upper and lower sides of the valve element, so that the valve element can be accidentally opened. In addition, when a fire occurs, the pressure drop in the air chamber breaks down the balance due to the pressure difference that has been set. 2.1 The water pressure on the firebox B side causes the valve body to open, and the valve opening opens. The extinguishing liquid from the primary room flows into the secondary side and is discharged from the radiating head, resulting in two fire extinguishing efforts.

In this way, by automatically opening and closing the valve body based on the balance of the pressure difference between water pressure and compressed air pressure, we have succeeded in obtaining the above-mentioned unique effects.

(Example) Hereinafter, embodiments of the present invention will be described according to nine embodiments shown in the drawings.

Figure i1 is a layout diagram of the fire extinguishing system, with pressure switch e
29) sprinkler pump activated by low pressure detection, (2) foam mixer that mixes flushing water and extinguishing agent, (3) dry valve, (4) discharge valve, (5) air compressor, ( 6)
This valve (6) is a simultaneous release valve, and the secondary side of the valve (6) is equipped with a foam head I'' (
7) A group of sensing heads (lO) is provided at the control port (8) of the pneumatic chamber A via a pipe (9).

Figure 4#j2 is a longitudinal sectional view of the simultaneous release valve (6), in which A is the air compressor (EE!E2'J chamber filled with compressed air from 51VC, B is the sprinkler pump 11).
)K is the primary chamber filled with extinguishing liquid, and C is 2 which has a liquid feed pipe (11) communicating with the foam head (71) as described above.
The next chamber, α2) is a valve body formed between the air chamber A and the 1st coal chamber B (05) which is removably pressed onto the valve seat (14) of 1B+
) has one end fitted into the upper annular recess 0η of the valve body 02) and its back surface pressed by a presser foot, and the other end fitted into the annular recess Q91 at the upper part of the valve body 02), with its back surface integrated with the cover). The diaphragm 1), which is clamped at the lower end of the valve body Q21, is connected to the valve port Q31 and the first firebox B side in the circumferential direction, with the guide hole (23) that guides the lower end of the spindle blade of the valve body Q21 in the center. a guide body having a plurality of communication holes (24) communicating with the
Acupuncture needles are spindle cover% (3 indicates rubber pads.

It's designed.

Next, the operation of the dry fire extinguishing system 6) constructed as described above will be explained.

First, compressed air is supplied to the air pressure chamber A by the air compressor (51) at a set minimum air pressure of 2 to f/Cd, -
Fire extinguishing liquid is applied to firebox B using a sprinkler pump fl+, and the water pressure is set to 1 xy (/all), that is, the ratio of air pressure to water pressure is set to 1:5 to create a pressure difference between chambers A and H. Balance woturu.

In other words, in the state shown in Figure @2, the pressure difference occurs between the air pressure chamber A and the first fire chamber B, and this maintains the balance, and the valve body (+21) is tightly sealed to the valve seat Q41. be.

Therefore, the extinguishing liquid in firebox A is
3) stays in firebox B by closing (constant state).

If a fire breaks out in this condition, the first thing to do is to
The sensing head f1 (11 senses and thereby senses the spatula) shown in the figure, the vibrator (9) and the control port (8)
The air pressure in the air pressure chamber A of the simultaneous release valve (6), which is communicated with the air pressure chamber A, decreases significantly, resulting in a low pressure state, and the pressure balance between the air pressure chamber A and the coal chamber B is disrupted.

Due to the water pressure in the coal chamber B due to this pressure imbalance, the valve body 02 is affected by the fluctuation of the diaphragm α.
) rises, as shown in Figure 3, the valve port (I31 opens and the communication port (24) communicates with the valve port 03), so that the liquid in the first coal chamber B flows into the second fire chamber C and the discharge port 01. ) and the liquid feed pipe (11), the water is discharged from the foam jetting head)'()), and the water pressure in the charcoal chamber B decreases.

As a result, the dry valve (3) that communicates with the first coal chamber B through the inlet port and the liquid feed pipe (c) opens, and the pressure switch Q9) detects low pressure, and the sprinkler pump fi
Activate the fire extinguishing liquid to the foam mixer (2) and the dry valve (3).
) of the simultaneous release valve (6), the liquid is forced to be fed from the 2nd group and the inlet to the 1st charcoal chamber B side.

! The extinguishing liquid thus flowed into the charcoal chamber B advances in the direction of the arrow in FIG.

At that time, a part of the extinguishing liquid flows into the pneumatic chamber A from the drain hole (to) and is discharged from the sensing head (10) via the control port tls1 and the vibrator (9). Most of it flows into the second coal chamber C through the open communication port (B) from the valve port 03), and from the discharge port 0υ via the liquid feed pipe (11), the foam is emitted all at once from the foam emission head (7) to the fire outbreak area. water is sprayed on.

In this way, the fire is completely extinguished by spraying the fire extinguishing liquid from the foam discharge head (7).

Next, when the fire has been extinguished in this manner, the water supply is stopped and the condition shown in FIG. 2 is resumed.

Note that the sensing means communicating with the pneumatic chamber A through the control port (8) and the vibrator (9) is not limited to the sensing head of the embodiment; 0')
:I may be used.

Further, in the above embodiment, the area ratio between the outer diameter of the valve body and the diameter l of the valve port, which is the opening of the valve, is set to 1:5 to create a pressure difference. It is by no means limited to this. The point is that the valve body can be sealed by pressing the valve body against the valve seat by maintaining the vertical pressure balance between the air pressure chamber A and the coal chamber B at all times, and in the event of a fire, the balance is disrupted and the valve body is pressed against the valve seat by water pressure. It is good if the valve opening becomes open state by rising, but if the ratio of the water pressure in the first coal chamber B and the air pressure in the air chamber A when the valve body operates is the differential (Df), the following formula is obtained. is required.

1 Water pressure in coal chamber B (1) W) In this case, the embodiment of the present invention is designed so that Dt=E-.

[Brief explanation of the drawing]

Figure 1 is a schematic layout of the fire extinguishing system. Figure 2 is a sectional view of the simultaneous release valve. FIG. 3 is a sectional view of the same when the valve is open.

Claims (1)

[Claims] 1. Pneumatic chamber A filled with compressed air and communicating with the sensing section side.
1 firebox B filled with water pressure by a pressurized water supply device, 2 fireboxes C communicating with the radiation head side, 1 firebox B and air pressure chamber A with valve bodies for opening and closing each of the chambers A, B, and C. In a dry automatic fire extinguishing system including a simultaneous release valve provided between The dry automatic fire extinguishing system is characterized in that the valve body is strongly sealed to the valve seat on the firebox B side by compressed air in the air pressure chamber A. 2. The dry automatic fire extinguishing system according to claim 1, wherein the pressure difference is set by setting the area ratio of the inner diameter of the valve port of the primary chamber B to the outer diameter of the valve body to be 1:5.