JPS585064B2 - fire extinguisher - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a fire extinguishing system that periodically test-runs a fire extinguishing pump to automatically check whether there is a failure or not, and maintains the normal function of the fire extinguishing equipment at all times. The present invention relates to a fire extinguishing system capable of detecting the operation of the extinguishing head even when a fire occurs during operation and operating the extinguishing head and operating the fire extinguishing head.

The inventors of the present application regularly test-operated a fire extinguishing pump that serves as a pressurized water supply source as a fire extinguishing system for buildings, apartments, etc. using an automatic inspection device, and during this test operation, The fire extinguishing function is checked by sequentially opening the test pulps installed at the terminals of branch pipes in each district and creating a simulated situation in each district that is the same as when the extinguishing head activates and sprays water due to an actual fire. We are proposing a new fire extinguishing system.

By the way, fire detection in such fire extinguishing systems involves installing automatic alarm devices (flowing water detection or pressure detection devices) in branch pipes in each area to detect the presence or absence of running water or a drop in pressure when the fire extinguishing head is activated due to a fire. In addition to giving a start command to the fire pump, the system also identifies and displays the area where the fire occurred.

However, with the above-mentioned fire extinguishing system, if a fire breaks out in the area and the fire extinguishing head is activated while the test pulp is opened and the fire pump is operated under actual load, pressurized water will not be supplied from the fire pump. Therefore, there was a problem in that the automatic alarm device installed in the branch pipe was already activated, making it impossible to detect an actual fire during the test operation.

The present invention was made in view of the above, and in order to ensure fire detection during test operation, the flow rate output of the flow meter installed at the inlet of the branch pipe in each area is the same as the flow rate output of the test flow meter. It is designed to output a fire signal when it detects that the temperature exceeds the limit.

Embodiments of the present invention will be described in detail below with reference to the drawings.

FIG. 1 is a schematic diagram showing an example of the equipment configuration of the fire extinguishing system of the present invention. An internal combustion engine 4 is installed, and pressurized fire extinguishing water from a fire pump 3 driven by the electric motor 2 or the internal combustion engine 4 is branched into branch pipes 6a to 6f on each floor via a main water supply pipe 5 extending upward. ing.

District flow meters 8a to 8f are provided at each of the branch portions between the main pipe 5 and each of the branch pipes 6a to 6f to detect and output the flow rate of fire extinguishing water flowing into each of the branch pipes 6a to 6f. , a test valve 11a is installed at the terminal of each branch pipe 6a to 6f.
11f and tube bed test flowmeters 12a to 12f, respectively, are provided, and are finally connected to a drain pipe 13.

The elevated water tank 14 installed on the roof is used to fill the main pipe 5 and branch pipes 6a to 6f with water, and applies head pressure to the pressure tank 15 installed in the basement to compress the air in the tank. , due to the pressure of compressed air in this pressure tank 15,
The fire extinguishing head 9 is pressurized under normal conditions (at least 1 kg/cm2 for the head installed on the top floor).

In addition, the terminal (rooftop side) of the water main 5 is connected to the test valve 1.
6 and a test flow rate sensor or pressure sensor 17 to the drain pipe 13.

On the other hand, a pressure sensor 18 for detecting the discharge pressure is provided on the discharge side of the fire pump 3 in the basement, and the discharge pressure is returned to the water tank 1 via a test valve 19 and a test flow sensor 20.

Note that 21 is a priming tank that stores priming water for the pump 3, and 22 is a pump starting board.

An embodiment of the fire extinguishing device of the present invention used in the fire extinguishing equipment constructed as described above is shown in the block diagram of FIG.

In Fig. 2, 26a to 26f are comparators, and flow rate outputs Q1 of district flowmeters 8a to 8f installed in each district, respectively.
and the flow rate output Q2 of the tube bed test flow meters 12a to 12f.
is compared with.

27 is an OR circuit that receives the outputs of the comparators 26a to 26f, 28 is an OR circuit that receives the output of a minor fault detection circuit (not shown), and 29 is an OR circuit that receives the output of a major fault detection circuit (not shown). , 25 are these OR circuits 27~
29 output (E0 to E2) as input, the fire pump 3
, is a control device that outputs control signals to the test valves 11a to 11f.

It should be noted that the outputs of the comparators 26a to 26f are also configured to be output to a fire identification indicator (illustrated in the direction of the arrow).

First, when performing periodic test operation, test valve 11
a to 11f are opened one after another. At this time, if the water supply system including the fire pump 3 is operating normally and no fire occurs, the flow rate output Q1 of the district flowmeters 8a to 8f and the pipe bed test flowmeter 12a are opened. The flow rate output of ~12f becomes Q1≈Q2, and the comparators 26a to 26f do not output.

Therefore, the OR circuit 27 does not output the fire signal E0, and the control device 25 sequentially opens the valves 111a to 11f to perform an actual load operation test for each area.

However, if a fire occurs in any district, the flow rate output Q1 of the district flowmeters 8a to 8f becomes larger than the flow rate output of the tube bed test flowmeters 12a to 12f.

That is, this is because the district flowmeters 8a to 8f detect a flow rate that is larger by the flow rate flowing out from the fire extinguishing head 9 on any floor.

At this time, one of the comparators 26a to 26f outputs an output to operate a display (not shown), and the OR circuit 27
A fire signal E0 is output to the control device 25.

The control device 25 outputs a "close" command signal to the open test valves 11a to 11f, and commands the fire pump 3 to continue operating.

Therefore, even if a fire occurs during a test run and the fire extinguishing head is activated, the test can be stopped and the fire extinguishing operation can be performed immediately.

In addition, to explain the outline of the control of the control device 25, the control device 25 is normally programmed to conduct tests on a monthly or weekly basis, and the tests for each district are as follows:
Open test valves 11a to 11f sequentially at regular intervals,
The test operation ends when the same water supply state as when the fire extinguishing head 9 is activated is created in the branch pipes 6a to 6f, and all test valves are opened.

Meanwhile, during the test, the temperature of the fire pump 3, the current and temperature of the electric motor 2, and the operating state of the engine 4 are detected by sensors (not shown), and predetermined signals E1 and E2 indicating a minor failure or major failure are detected. The test will stop when the is output.

Also, if the fire signal Eo is output when the test is stopped due to a minor failure, the fire pump 3 is started, but when the test is stopped due to a major failure, the fire signal E0 is output. In such a case, the fire pump 3 should not be operated in order to prevent secondary disasters.

As explained above, according to the fire extinguishing system of the present invention, even if a fire occurs during test operation with the automatic inspection device, it can be reliably detected, so that the water supply system including the fire pump can be kept in the extinguishing operation state. This has the excellent effect of making it possible to maintain and inspect fire extinguishing equipment and extinguishing fires more reliably.

[Brief explanation of drawings]

FIG. 1 is a schematic explanatory diagram of the equipment configuration of the present invention, and FIG. 2 is a block diagram showing an embodiment of the present invention. DESCRIPTION OF SYMBOLS 1... Water tank, 2... Electric motor, 3... Fire pump, 4... Internal combustion engine, 5... Water supply main, 6a-6f.
... Branch pipe, 8a-8f... District flow meter, 9... Fire extinguishing head, 11a-11f - Test valve, 12a-1
2f...flow meter for tube bed test, 25...control device,
14...Elevated water tank, 15...Pressure tank, 16,1
9...Test valve, 17,18...Pressure sensor,
20... Test flow rate sensor, 21... Priming tank, 22
...starting board, 26a-26f-comparator, 27-29.
...OR circuit.

Claims (1)

[Claims] 1. A fire system in which a plurality of fire extinguishing heads are provided in each branch pipe that is installed in each district and is supplied with pressurized water from a pump, and when the fire extinguishing head is activated, the district where the activated fire extinguishing head is installed can be identified. In a fire extinguishing system designed to output a signal, a test flow meter installed via a test valve on the pipe bed of the branch pipe in each district, and a district flow meter installed at the inlet of the branch pipe in each district. and a comparator that compares the flow rate output of the test flowmeter and the district flowmeter and outputs the fire signal when it is detected that the flow rate output of the district flowmeter exceeds the flow rate output of the test flowmeter. A fire extinguishing device characterized by being equipped with.