JP3165568B2 - Sprinkler fire extinguishing equipment - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a sprinkler fire extinguishing system, and more particularly to a sprinkler fire extinguishing system capable of visually checking flowing water flowing through a drain pipe of an automatic alarm valve.

[0002]

2. Description of the Related Art In a conventional sprinkler fire extinguishing system, a test valve disposed on a secondary side of an automatic alarm valve is remotely controlled or manually opened to specify a drain pipe provided on a secondary side of the test valve. The amount of running water is flowed, and the operation of the running water detection device of the automatic alarm valve is checked.

[0003]

When the running water detection device operates, a running water detection signal is obtained on a monitoring panel, for example.
As a result, it can be confirmed that the flowing water is flowing with the opening of the test valve, but there is a problem that it is impossible to confirm whether the flowing water is actually flowing since the inside of the pipe is not visible in appearance. Then, this invention was made in order to solve the above-mentioned subject, and an object of this invention is to obtain the sprinkler fire extinguishing equipment which can confirm visually that flowing water is flowing into the drain pipe of an automatic alarm valve.

[0004]

In order to achieve this object, a sprinkler fire extinguishing system according to claim 1 of the present invention comprises at least a part of a drain pipe of an automatic alarm valve formed of a transparent pipe. In front of the test valve side with respect to the pipe
The drain pipe is provided with an intake valve .

[0005]

According to the first aspect of the present invention, the flowing water flowing through the transparent tube can be visually confirmed , and the water can be prevented from constantly staying in the transparent tube.

[0006]

【Example】

Embodiment 1 FIG. Hereinafter, an embodiment of the present invention will be described in detail with reference to the accompanying drawings. FIG. 1 is a schematic configuration diagram showing a first embodiment of a sprinkler fire extinguishing system according to the present invention. In FIG. 1, reference numeral 1 denotes an NS valve as an automatic alarm valve provided on each of a plurality of floors of a building such as a building and having a pressure regulating function and a fire detector interlocking function. 3, a main valve 4, and a branch pipe 5 branched at each floor of the building, connected to a water supply main pipe 6, and a secondary side 7 of the main pipe 6 is connected to a secondary side pipe 8; A plurality of sprinkler heads 9 are mounted.

The NS valve 1 normally shuts off the primary pipe 3 and the secondary pipe 8 by its valve body 1a to maintain the secondary pressure lower than the primary pressure, but the Based on a fire signal from a sensor (not shown), it can be opened by a control signal from a monitoring panel (not shown). In more detail, the NS valve 1 is connected to the primary side 2
The valve seat 1b that separates the valve seat 1b from the secondary side 7 is closed by a valve element 1a that is biased by a spring 1c. The piston 1d integral with the valve body 1a forms a cylinder 1f together with the valve box 1e.

The NS valve 1 further includes a motor-operated remote test valve 10 and a manual test valve 11 which are disposed on the secondary side 7 thereof and test the flow of water to the secondary pipe 8. The pressure regulating pilot valve 12 for reducing the pressure of the pressurized fire extinguishing water in the side pipe 3 to a predetermined pressure by adjusting the opening of the NS valve 1 and supplying the same to the secondary side pipe 8, and pressurizing and releasing the NS valve 1 in a normal state The electric start valve 13 that shuts off and performs the above-described operation to shift to the openable state.
Further, a manual start valve 14 connected in parallel with this, and a discharge pressure valve 15 for discharging abnormally high pressure in the secondary pipe 8 are provided.

The pressure regulating pilot valve 12 branches from the secondary side 7 of the NS valve 1 to supply a secondary pressure to the operation chamber 1 through a pipe 7a.
2a, the primary pressure is taken in from the primary side 2 of the NS valve 1 via the pipe 2a, the strainer (garbage remover) 16 and the pipe 2b, and the opening of the valve body 12d is adjusted by the pressure regulating action of the flam 12b and the spring 12c. When the secondary pressure is low, the valve body 12d is opened, the primary pressure is supplied to the cylinder 1f of the NS valve 1 via the start valve 13 or the manual start valve 14 by the pipe 2c, and the NS valve 1 is opened. Let Also,
Since the pressure regulating pilot valve 12 directly communicates with the secondary side 7 of the NS valve 1 through the pipe 7a as described above, a small drop in the secondary pressure is added during the opening operation.

The opening operation of the NS valve 1 in the event of a fire by the pressure regulating pilot valve 12 will be described in more detail. If the secondary pressure introduced into the operation chamber 12a by the pipe 7a is lower than a predetermined pressure, the flam The valve body 12d is opened by the pressure regulating action of the spring 12c and the spring 12c, and the primary pressure is gradually introduced into the cylinder 1f through the pipe 2c and the opened start valve 13 or the manual start valve 14, and the piston 1d
d is pushed up (to the left in the drawing), the interlocking valve element 1a is opened, and fire extinguishing water flows from the primary side 2 to the secondary side 7. Conversely, when the secondary pressure is higher than the predetermined pressure, the valve body 12d closes due to the pressure adjusting action of the flam 12b and the spring 12c, the inflow of the primary pressure decreases, the pressure in the cylinder 1f decreases, and the piston 1d Falls (to the right in the drawing),
Since the interlocking valve element 1a is closed, the flow of fire-extinguishing water from the primary side 2 to the secondary side 7 is reduced, and this operation is repeated so that the valve element 1a maintains a predetermined opening.

In this manner, the opening of the NS valve 1 is adjusted, and the secondary pressure is adjusted to a predetermined pressure suitable for the fire extinguishing operation, for example, 3.5 kg / cm ² near the secondary side 7. The operation chamber 12a of the pressure control pilot valve 12 is connected to the secondary pipe 8 via a pipe 7a via a small hole 12e of a piston portion of a valve body 12d opened for pressure control. As a result, the pressure in the secondary pipe 8 is increased at the time of the opening operation of the pressure control pilot valve 12, so that the pressure is constantly maintained at a predetermined pressure by the pressure control action of the pressure control pilot valve 12, and the temperature of the secondary pipe 8 is maintained. Replenish a small amount of primary pressure when the pressure drops due to changes. At this time,
The NS valve 1 does not open, so that no open signal, i.e., a running water signal, is generated. At the same time, the pressure flows into the back surface via the piston 1d, and the sliding of the valve body 1a becomes slow, so that there is an effect that the pressure adjusting operation is easily performed.

Accordingly, when the sprinkler head 9 is opened due to a fire, water can be discharged immediately at a predetermined pressure suitable for fire-extinguishing activities. The NS valve 1 is opened by the pressure regulating action of, and the opening degree of the valve body 1a is adjusted, so that fire-extinguishing water of a predetermined pressure suitable for fire-extinguishing activity is supplied to the secondary pipe 8.

The opening of the starting valve 13 is controlled based on a fire signal from a plurality of fire detectors (not shown) arranged on each floor of the building, similarly to the plurality of sprinklers 9. The valve 1 is disconnected from the cylinder 1f. Therefore, if the starting valve 13 is not opened, the cylinder 1f of the NS valve 1 is switched from the pressure regulating pilot valve 12 to the cylinder 1f.
Cannot be pressurized and the NS valve 1 can be pressurized and released only when the fire has occurred and the start-up valve 13 is open. The starting valve 13 is connected to the terminal block 17 by an electric circuit shown by a broken line.
(This is electrically connected to the monitor panel.) It is opened and closed by a motor 13a such as a motor or an electromagnetic solenoid connected to the monitor panel. The manual activation valve 14 is a valve for manually operating the activation valve 13 based on the fire signal of the fire detector.

The pressure relief valve 15 is opened when the pressure of the secondary pipe 8 maintained at a predetermined pressure by the operation of the pressure regulating pilot valve 12 suddenly increases, and the pressure on the secondary pipe 8 is increased more than necessary. Is prevented. The secondary pressure is measured by a pressure gauge 18 provided on the secondary side 7 of the NS valve 1, while the primary pressure of the fire extinguishing water in the primary side 2 is measured by a pressure gauge 19 connected to the strainer 16.

A running water detection pressure switch 20 for detecting the opening of the NS valve 1 is formed in a valve seat 1b of the NS valve 1 and opened simultaneously with the opening operation of the valve body 1a.
And a running water signal is supplied to the terminal block 17 and, consequently, to the monitoring panel by an electric circuit shown by a broken line. The pipe 2 d is connected to a drain pipe 22 via an orifice 21, so that the fire extinguishing water that has operated the flowing water detection pressure switch 20 when the NS valve 1 is opened is gradually drained. A pressure switch 23 for detecting a decrease in the pressure in the secondary side pipe 8 due to opening of the sprinkler head 9 or the like is connected to the pipe 7a, and is connected to the terminal block 17 by an electric circuit shown by a broken line. Provides a secondary pressure drop signal. Therefore, this secondary pressure drop detecting pressure switch 2
The terminal block 17 is operated by any cause such as an abnormal operation of the sprinkler head 9 or an abnormality such as water leakage of the secondary side pipe 8 or opening of the sprinkler head 9 before the start valve 13 or the manual start valve 14 is opened. To supply a secondary pressure drop signal to thereby warn of a malfunction or the like of the sprinkler head 9.

The remote test valve 10 and the manual test valve 11 are NS
The secondary side 7 of the valve 1 and the drain pipe 22 are connected in parallel with each other. The remote test valve 10 is opened and closed by remote control from a monitoring panel or the like by a motor or an electromagnetic solenoid or the like connected to the terminal block 17 by an electric circuit shown by a broken line, so that the sprinkler head 9 does not actually operate. Flows the same amount of water through the drain pipe 22 as in the case of the operation. The manual test valve 11 also performs the same drainage manually.

The transparent pipe 22a is provided at least partly in the middle of the drain pipe 22 so that the running water caused by the opening of the remote test valve 10 or the manual test valve 11 can be visually confirmed from the outside. . A check valve 25 for preventing backflow due to drainage or the like from the upper floor is provided on the drainage main pipe 24 side of the transparent pipe 22a. In addition, the transparent pipe 22 is used so that the drainage does not stay inside the drainage pipe 22.
An intake valve 26 is provided on the side of the remote test valve 10 and the manual test valve 11 shown in FIG. External air is introduced into the drain pipe 22 by the intake valve 26, and the drain water can be reliably discharged. In addition, the position of the transparent pipe 22a is
2 may be a position where all the drainage is collected. However, in order to check the flowing water from the remote test valve 10 and the manual test valve 11, the drainage side of any of these test valves may be used.

The water supply main pipe 6 is a pipe for supplying fire extinguishing water from a pressurized water supply device (not shown) to each part of the sprinkler fire extinguishing equipment. In order to detect the state of the main valve 4, the limit switch 4a is connected to the terminal block 1 by an electric circuit.
7 is connected. The drain main pipe 24 is a pipe for discharging drain water from each NS valve 1 to a predetermined drain path (not shown).

The terminal block 17 is a portion in which wiring for transmitting / receiving various signals for remote control of each part of the NS valve 1 and for monitoring the state is collected.

Next, the operation of the first embodiment will be described in detail. At the time of filling each system, fire extinguishing water is first introduced from the pressurized water supply device to the primary side 2 of the NS valve 1 through the water supply main pipe 6, the branch pipe 5, the open main valve 4 and the primary pipe 3; Next, the starting valve 13 or the manual starting valve 14 is opened, and the fire extinguishing water on the primary side 2 is supplied with the pipe 2a, the strainer 16, the pipe 2b, the pressure regulating pilot valve 12, the pipe 2c and the opened starting valve 13 or the manual starting valve 14. The NS valve 1 is made openable by communicating with the cylinder 1f of the NS valve 1 through the valve, and the fire extinguishing water is allowed to slowly flow into the secondary pipe 8 to a predetermined pressure, and the start valve 13 or the manual start valve 14 is closed.

When a fire occurs and the fire detector operates to generate a fire signal, a control signal is sent to the terminal block 17 of the NS valve 1 from the monitor panel receiving the fire signal. When this control signal is supplied from the terminal block 17 to the electric unit 13a to operate the electric unit 13a to open the starting valve 13, the fire extinguishing water introduced from the water supply main pipe 6 to the primary side 2 of the NS valve 1 is removed from the sprinkler. After the pressure is regulated by the pressure regulating pilot valve 12 in accordance with the pressure reduction on the secondary side 7 due to the opening of the head 9, the pressure gradually enters the cylinder 1 f of the NS valve 1 through the opened starting valve 13, and therefore the piston 1 d Moves the valve body 1a slowly from the valve seat 1b.
The fire extinguishing water is gradually introduced into the secondary side 7 and thus into the secondary side pipe 8. When the water pressure in the flowing water detection chamber 1g and the pipe 2d rises, the flowing water detection pressure switch 20 operates and the terminal block 1
7 is notified that the NS valve 1 has been opened. After that,
The introduction of fire-extinguishing water into the secondary pipe 8 is controlled by the above-described pressure-adjusting action of the pressure-adjusting pilot valve 12, and the fire-extinguishing water is reduced in pressure to a predetermined pressure and supplied.

Thereafter, when the water discharge from the sprinkler head 9 continues, this large water discharge amount is detected by a pressurized air tank (not shown) or the like, and the pump (not shown) of the pressurized water supply device is started to supply water. High-pressure fire-extinguishing water is supplied from the main pipe 6 to the primary side 2 of the NS valve 1. As described above, the secondary pipe 8 to the sprinkler head 9 is filled with fire-extinguishing water of a predetermined pressure, so that the fire-extinguishing water is discharged simultaneously with the opening of the sprinkler head 9, and there is no delay in the fire-extinguishing activity.

[0023]

As described in detail above, claim 1 is as follows.
According to the invention, at least a part of the drain pipe of the automatic alarm valve such as the NS valve is formed of a transparent pipe, so that it is only possible to visually confirm that flowing water from the test valve is flowing at the time of the test with the transparent pipe part. In addition, in the normal monitoring state, it is possible to monitor the state of various valves such as water leakage through the transparent tube. Further, the drainage on the test valve side with respect to the transparent tube
Since the pipe is provided with an intake valve, water always stays in the transparent pipe.
And can see the flow only when there is running water
This has the effect.

[0024]

[Brief description of the drawings]

FIG. 1 is a schematic configuration diagram showing a first embodiment of the present invention.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 NS valve 10 Remote test valve 11 Manual test valve 22 Drain pipe 22a Transparent pipe 24 Drain main pipe 26 Intake valve

──────────────────────────────────────────────────続 き Continuation of front page (72) Inventor Sannan Aoki 4-73-3, Kudanminami, Chiyoda-ku, Tokyo Nomi Disaster Prevention Co., Ltd. (56) References JP-A-4-276272 (JP, A) Showa 52-33000 (JP, U) Actually open Showa 60-67126 (JP, U) (58) Fields investigated (Int. Cl. ⁷ , DB name) A62C 35/00-37/50

Claims (1)

(57) [Claims] 1. A drain pipe for connecting a secondary side of at least one test valve disposed on a secondary side of an automatic alarm valve to a drain main pipe, wherein at least a part of the drain pipe is a transparent pipe. Make up
And the drain on the test valve side with respect to the transparent tube.
Sprinkler fire extinguishing equipment characterized by having an intake valve in the water pipe .