JPH04129574A - Sprinkler facility - Google Patents

Abstract

PURPOSE:To minimize the damage by a water spray by closing an automatic switching valve at every fixed time after sprinkler heads are operated, keeping the automatic switching valve closed when an extinguishment signals are received from sensors, and opening it when no extinguishment signal is received. CONSTITUTION:After sprinkler heads 22 are operated, the signal of a pressure switch 37 is inputted in sequence, a power source is turned on in several min, and an automatic switching valve 31 is closed. When indoor sensors 36a, 36b detect the temperature reduction, a control panel 16 transmits a signal that the power source of the operated automatic switching valve 31 is kept on, i.e., the valve 31 is kept closed, to each power valve. When no temperature reduction is detected, it is judged that a fire is continued, the power source of the operated automatic switching valve 31 is turned off, i.e., the valve 31 is opened, and water is sprayed from the sprinkler heads 22 for several more min. When the indoor sensors 36a, 36b detect the temperature reduction, i.e., fire extinguishment, the automatic switching valve 31 is closed, and a further water spray can be avoided.

Description

[Detailed description of the invention] (Industrial application field) The present invention relates to sprinkler equipment.

Specifically, it involves a fixed fire extinguishing system that installs sprinkler heads on the ceiling and releases and diffuses water to extinguish the fire.

(Prior Art) Sprinkler equipment is broadly divided into closed type and open type, and closed type is further divided into wet type, dry type, and pre-activation type. Wet sprinklers are generally used as sprinkler equipment. Wet sprinklers use closed sprinkler heads, and the pipes are constantly filled with pressurized water. When a fire occurs, the heat-sensitive part of the sprinkler head melts and water is automatically sprayed.

An example thereof will be explained with reference to FIG.

(101) is a water source installed in the equipment. (102
) is a sprinkler pump that pumps out and supplies water stored in a water source. (103) is the priming tank, (104)
is the water supply pipe that supplies water to the priming tank. (105) is
This is a pressure tank that pressurizes the inside of the piping. (106) is a control panel that controls the operation of the sprinkler pump (102). (107) is a receiving panel, which is connected to the control panel (106). (108), (10B) are automatic alarm valves, (
109) and (109) are motor sirens. An automatic alarm valve (108) and a motor siren (109) are each connected to a receiver board (107).

An automatic alarm valve (108) is installed on each floor or fire block to sense a decrease in pressure or a change in water flow supplied to the pipes, transmit a signal to that effect, and output a fire alarm. The pressure reduction in the pressure tank (105) is sensed, the pressure switch (117) is activated, and the control system is activated.
The sprinkler pump (102) is activated to supply water into the pipe. (110) is the main pipe. Main piping (1
10) is plumbed from a sprinkler pump (102). (111) is a branch pipe that branches from the main pipe (110) to each floor. An automatic alarm valve (108) is installed in each branch pipe (111). (11
2) is a sprinkler head. Sprinkler heads (112) are installed at necessary locations on each floor or each fire protection block.

(113) is an auxiliary fire tank installed on the roof of a house, and is installed so that it can be supplied to the main pipe (110).

(114) is a water supply port, which allows water to be supplied from a fire engine directly to the main pipe (110) in the event of a fire. (115) is an end test valve, and (116) is an orifice, which is attached to the end of the branch pipe (111).

(117) is a pressure switch, and a pressure tank (105
) is sensed and activated. (118) is a manual valve, which is attached to the downstream side of the sprinkler pump (102), and is connected to the main pipe (118) from the sprinkler pump (102).
It is possible to manually stop the flow of water into 10).

(Problems to be Solved by the Invention) Sprinkler equipment is particularly effective against initial fires that can be extinguished by sprinkler equipment. However, in conventional sprinkler equipment, when a fire is sensed, the heat-sensitive part of the sprinkler head melts and water is automatically sprayed. All of the water comes out automatically, and the water spraying does not stop until it is stopped manually, causing water damage after the fire is extinguished. A pipe that supplies water stored in a water source with a sprinkler pump, an automatic alarm valve installed in the pipe that detects the depressurized state of the water supplied to the pipe or a change in water flow, and issues an alarm upon sensing; Water is supplied via an automatic alarm valve, and a sprinkler head installed indoors that sprays water from the pipes when it detects the occurrence of a fire, and a sprinkler head that is connected to the pipes and supplies water from outside to the pipes as needed. A water inlet that allows the sprinkler to run, an electromagnetic valve that is installed in the piping on the side of the sprinkler head from the sprinkler pump and which is normally kept open, and a sensor that detects the occurrence of a fire that is installed in the facility where the sprinkler equipment is installed. It consists of an electromagnetic valve switch that is installed near the water inlet and can cause the electromagnetic valve to take an open state, and a control means that is connected to the sensor and the electromagnetic valve.
The control means closes the electromagnetic valve at regular intervals after the sprinkler head is activated, detects the presence or absence of a signal indicating that the fire has been extinguished from the sensor, and receives the transmission of the signal indicating that the fire has been extinguished from the sensor. sprinkler equipment, characterized in that the solenoid valve is made to take a closed state when the fire is extinguished, and the solenoid valve is made to take the open state when the transmission of a signal indicating that the fire is extinguished is not received from the sensor, and a water source; A pipe that supplies water stored in a water source with a sprinkler pump, an automatic alarm valve installed in the pipe that detects the depressurized state of the water supplied to the pipe or a change in water flow, and issues an alarm upon sensing; Water is supplied via an automatic alarm valve, and a sprinkler head installed indoors that sprays water from the pipes when it detects the occurrence of a fire, and a sprinkler head that is connected to the pipes and supplies water from outside to the pipes as needed. The water inlet is connected to the piping and supplies water to the piping, the firefighting auxiliary tank is installed in the piping on the side of the sprinkler head from the sprinkler pump, and the piping on the side of the sprinkler head from the auxiliary fire tank, and the valves are normally open. an electromagnetic valve that is forced into an open state, a sensor that detects the occurrence of a fire that is installed in a facility where sprinkler equipment is installed, and an electromagnetic valve switch that is installed near a water inlet that allows the electromagnetic valve to take an open state; It consists of a sensor and a control means connected to the electromagnetic valve, and the control means closes the electromagnetic valve at regular intervals after the sprinkler head is activated.
It detects the presence or absence of a signal indicating that the fire has been extinguished from the sensor, and when a signal indicating that the fire has been extinguished is received from the sensor, the electromagnetic valve is closed, and the signal indicating that the fire is extinguished is transmitted from the sensor. Sprinkler equipment characterized by causing a solenoid valve to take an open state when no transmission is received, and a water source, piping to which water stored in the water source is supplied by a sprinkler pump, and piping installed in the piping and piping. An automatic alarm valve that detects the reduced pressure state of the water supplied inside the pipe or a change in water flow and issues an alarm based on the sensing, and an automatic alarm valve that detects the occurrence of a fire while water is supplied from the pipe through the automatic alarm valve. A sprinkler head installed indoors that sprays out water, a water inlet that is connected to the pipe and allows water to be supplied from the outside to the pipe as necessary, and an automatic alarm valve that is installed close to the pipe and the valve is normally open. an electromagnetic valve that is forced into an open state, a sensor that detects the occurrence of a fire that is installed in a facility where sprinkler equipment is installed, and an electromagnetic valve switch that is installed near a water inlet that allows the electromagnetic valve to take an open state; It consists of a sensor and a control means connected to the electromagnetic valve, and the control means closes the electromagnetic valve at regular intervals after the sprinkler head is activated, and detects whether or not a signal indicating fire extinguishment is transmitted from the sensor. If a signal indicating that the fire is extinguished is received from the sensor, the solenoid valve is set to the closed state, and if no signal is received from the sensor indicating that the fire is extinguished, the solenoid valve is set to the open state. a water source, a pipe for supplying water stored in the water source with a sprinkler pump, and a sprinkler system installed in the pipe to detect a change in the reduced pressure state or water flow of the water supplied into the pipe. an automatic alarm valve that issues an alarm by sensing the occurrence of a fire, and a sprinkler head installed indoors that supplies water from the pipes via the automatic alarm valve and sprays water in the pipes when it detects the occurrence of a fire. A water inlet that is connected to the piping and allows water to be supplied from the outside to the piping, an auxiliary fire tank that is connected to the piping and supplies water to the piping, and a valve that is usually installed in the piping close to the automatic alarm valve. a solenoid valve that is forced to open, a sensor that detects the occurrence of a fire that is installed in a facility where sprinkler equipment is installed, and a solenoid valve switch that is installed near the water inlet that can cause the solenoid valve to be opened; It consists of a sensor and a control means connected to the solenoid valve, and the control means closes the solenoid valve at regular intervals after the sprinkler head is activated, and determines whether or not a signal indicating fire extinguishment is transmitted from the sensor. If a signal indicating that the fire is extinguished is received from the sensor, the solenoid valve is set to the closed state, and if no signal is received from the sensor indicating that the fire is extinguished, the solenoid valve is set to the open state. (Function) When the sprinkler head detects the occurrence of a fire, the detected sprinkler head sprays water in the piping, creating a water flow. When the pressure in the pipe decreases, the automatic alarm valve detects a drop in water pressure or water flow, transmits a signal to that effect, issues a fire alarm, and activates the sprinkler pump by operating the pressure switch, allowing water from the water source to flow into the pipe. supply and also issue an alarm.

Water flows from the water source or, if an auxiliary fire tank is installed that is also connected to the piping and supplies water to the piping as needed, from the auxiliary fire tank, passes through the piping, passes through an automatic alarm valve, and is sprayed from the sprinkler head. .

After the sprinkler pump is activated, the electromagnetic valve is closed at regular intervals to detect whether or not a signal indicating that the fire has been extinguished is transmitted from the sensor. When receiving a signal indicating that the fire has been extinguished from the sensor, the control means causes the electromagnetic valve to take a closed state. If the control means does not receive a signal transmission from the sensor indicating that the fire is extinguished, the control means causes the solenoid valve to remain open.

If a solenoid valve is installed in the sprinkler head rather than the sprinkler pump, or if it is also installed in a pipe closer to the sprinkler head than the firefighting auxiliary tank, when the solenoid valve is closed, water will flow through these valves. will be stopped.

When solenoid valves are installed in close proximity to automatic alarm valves, water is shut off at these valves when the solenoid valves are closed.

When the solenoid valve is in the closed state, if water is to be supplied from the water supply port to the piping, the solenoid valve switch is operated to cause the solenoid valve to open.

(Embodiment) An outline of an embodiment of the present invention will be explained with reference to FIG. 1, and a diagram of its operation process will be explained with reference to FIG. 2.

(11) is a water source installed in the equipment.

(12) is a sprinkler pump that pumps out and supplies water stored in a water source. Sprinkler pump (11)
The pipes are constantly filled with water. (13) is a priming tank, and (14) is a water supply pipe that supplies water to the priming tank. (1
5) is a pressure tank that constantly pressurizes the inside of the pipe. (1
6) is a control panel which is a control means consisting of a microcomputer, etc., and (17) is a receiving panel.

The control panel (16) controls the operation of the sprinkler pump (12), and also receives signals transmitted from an automatic alarm valve (18) etc. connected to the receiver panel (17) via the receiver panel (1)). receive. (17) is a receiving board. (18
), (18) are automatic alarm valves, and (19), (19) are motor sirens which are alarm means. Automatic alarm valve (18)
, motor siren (19) are each connected to a receiver board (17). The receiver board (17) is further connected to a control board (16). An automatic alarm valve (18) is installed on each floor or even on each fire block. Automatic alarm valve (1
8) senses the reduced pressure or water flow in the piping, transmits a signal to that effect to the control means, and causes the alarm means (19) to generate an alarm. (20) is the main pipe. Main piping (20)
is piped from the sprinkler pump (12). Manual valves (28) j and (28) k are installed from the main 8 pipes (20) of the automatic alarm valves (18) and (18), respectively.

(2nd construction) is a branch pipe that is branched from the main pipe (20) for each floor or for each fire prevention block. An automatic alarm valve (18) is installed in each branch pipe (21). (22) is a sprinkler head. Sprinkler heads (22) are installed at necessary locations on each floor or each fire protection block, each attached to a branch pipe (21) and connected to an automatic alarm valve (18). The sprinkler head (22) senses the occurrence of a fire by a rise in temperature, and sprays water in the piping based on the sensing. (23)
is an auxiliary fire tank, and the main piping (2) is installed on the roof of the house.
0) so that it can be supplied and connected. The firefighting auxiliary tank (23) may not need to be installed. (24
) is a water supply port, and is installed at a position where water can be directly supplied from the fire engine to the main pipe (20) in the event of a fire. (25) is an end test valve, and (26) is an orifice, which is attached to the end of the branch pipe (21). (2
B) a is a manual valve, sprinkler pump (12
) is installed on the downstream side of the sprinkler pump ( ]2
) to the main pipe (20) manually.

(28)b, (2g)c, (28)d, (2g
)e, (2g)f, (2B)g, (2g)h, (28
) Each i is a manual valve.

According to a first embodiment of the present invention illustrated in FIG.
31), (32), the second aspect of this invention illustrated in FIG.
(33) and (34) according to the embodiment are electromagnetic valves each having the structure shown in FIG. 4. The solenoid valve (31) connects the sprinkler pump (
10), in this example, the manual valve (2g) is installed immediately downstream of a. The electromagnetic valve (32) is
It is attached to the outlet of the main pipe (20) to the auxiliary fire tank (23). In the second embodiment, the electromagnetic valve (
33) and (34) are each attached to the main pipe (20) side from the automatic alarm valve (18) near the branching point of the branch pipe (21) with the main pipe (20). Each electromagnetic valve (31
), (32), (33), and (34) are connected to the control panel (16) via the receiver panel (17), and when the electromagnetic valve drive power source is turned off, the valves are in the open state. , and when the electromagnetic valve driving power source is turned on, the valve is configured to be in a closed state. That is, when a fire does not occur, the driving power source is turned off and the valve remains open.

Therefore, even if transmission of operating signals and sensing signals becomes impossible in the event of a fire, each valve will remain open and water will be sprayed, ensuring safety. (35) is an electromagnetic valve switch. The electromagnetic valve switch (35) is installed near the water inlet (24) that can be operated by a firefighter, and the electromagnetic valves (31), (32), (33), and (34) can be opened by manual switch operation. It is possible to take it.

(36)a, (36)b, (36)c, (
36) cl, (36) e, and (36) f are indoor sensors installed at predetermined positions on each floor or each fire prevention block to detect the occurrence of a fire. Indoor sensor (36)
a, (36) b, etc. are each connected to the control panel (16). Alternatively, they may be connected via a central control room. Problems with indoor sensors include sensitivity disturbances, including sensitivity disturbances due to soot, sensitivity disturbances due to temperature and steam, sensitivity disturbances due to smoke, and sensitivity disturbances due to obstructions. Since the accuracy of is not very required, this embodiment uses a temperature sensor. (37) is a pressure switch. The pressure switch (37) operates the sprinkler pump (12) based on the activation signal from the control panel (16) to constantly pressurize the inside of the pipe.

Next, the operation of the sprinkler will be explained according to FIG.

When a fire occurs, the sprinkler head (22) senses a rise in temperature and sprays water in the branch pipe (21) into the room from the detected sprinkler head (22). Then,
A water flow is generated in the branch pipe (21) and the water pressure decreases, and the automatic alarm valve (18) senses the decrease in water pressure or the water flow. When the automatic alarm valve (22) detects a drop in water pressure or water flow, it activates a motor siren (19) to issue an alarm and sends a signal to that effect via the central control panel to the receiver panel (17).
to be transmitted.

The indoor sensors (36) a and (36) b also sense a rise in temperature and transmit a signal to that effect to the receiver board (17) directly or via the central control room. Receiving board (17
), the signal is further transmitted to the control panel (16).

The sprinkler pump (12) receives a signal to that effect from the pressure switch (37) that has detected a decrease in water pressure via the control panel (16), and is activated to pump water in the water source (11) to the main pipe (20). ).

Water is supplied from a firefighting auxiliary tank (23) that is connected to a water source (11) or a main pipe (20) and supplies water to the main pipe (20).
), it is also supplied from the auxiliary tank (23), and is supplied through the automatic alarm valve (18) to the resprinkler head (22).
).

After the sprinkler head (22) is activated, the pressure switch (3
Sequence input is performed using the signal 7).

The sequence is approximately every 3 to 10 minutes, in this example 5
The following operations are performed every minute.

That is, 5 minutes after the sprinkler is activated, the power is turned on and the sprinkler is closed. Did the indoor sensor (36) a or (36) b that detected the fire detect a drop in temperature? Indoor sensor (3B)a or (36
) When b etc. sense a temperature drop, the control panel (16) transmits a signal to each power supply valve (31) etc. to maintain the power of the activated electromagnetic valve (31) etc. in the on state, that is, in the closed state. do. If the indoor sensor does not detect a drop in temperature, it is determined that the fire continues and the activated solenoid valve (
31) etc. outputs a power off state, that is, an open state, and water is sprayed from the sprinkler head (22) for an additional 5 minutes.

Therefore, when the indoor sensor (36) 2 etc. detects that the fire has been extinguished due to a drop in temperature, etc., the power to the electromagnetic valve (3) etc. is turned on and closed, and further water fountains are avoided. On the other hand, unless the indoor sensor (36) a etc. detects a fire extinguishing state such as a decrease in temperature, or if a signal from the indoor sensor (36) a cannot be received and a decrease in temperature cannot be detected, the electromagnetic valve (31) etc. will not operate the sprinkler. The fountain from the head (22) continues.

If a firefighter, etc. wants to continue spraying water even after the electromagnetic valve (31) etc. is closed and the water fountain from the resprinkler head (22) has stopped, the electromagnetic valve switch (35)
) to open the electromagnetic valve (31), etc., and continue the fountain.

(Effects of the Invention) Therefore, according to the present invention, it is possible to minimize the harm caused by water fountains that occur after the sprinkler is activated.

[Brief explanation of the drawing]

Fig. 1 is a schematic diagram of an embodiment of this invention, Fig. 2 is a schematic diagram of an embodiment of the same location, Fig. 3 is an operation process diagram of an embodiment of this invention, and Fig. 4 is an explanatory diagram of an electromagnetic valve. , FIG. 5 is a schematic diagram of a conventional example. (12)...Sprinkler pump, (16)...Control means, (18)...Automatic alarm valve, (19)...Alarm means, (20)...Main piping, (21)... branch piping,
(22)...Spring Rahet, (23)...Auxiliary fire tank, (24)...Water inlet, (31), (
32), (33), (34)・Electromagnetic knob, (35)
...Solenoid valve switch, (36) a, (36)
b, (36) c.

Claims (4)

[Claims] (1) A water source, a pipe to which the water stored in the water source is supplied by a sprinkler pump, and an automatic system that is installed in the pipe and detects changes in the reduced pressure or water flow of the water supplied into the pipe and issues an alarm upon sensing. Water is supplied from the alarm valve and the pipe via an automatic alarm valve, and a sprinkler head installed indoors that sprays water in the pipe when it detects the occurrence of a fire, and a sprinkler head that is connected to the pipe and enters the pipe from outside. A water inlet that replenishes water when necessary, a solenoid valve that is installed in the piping on the side of the sprinkler head from the sprinkler pump and is normally left open, and a fire prevention valve that is installed in the facility where sprinkler equipment is installed. It consists of a sensor that detects the water supply, an electromagnetic valve switch that is installed near the water inlet and can cause the electromagnetic valve to take an open state, and a control means that is connected to the sensor and the electromagnetic valve. The solenoid valve is closed at regular intervals, the sensor detects whether a signal indicating that the fire has been extinguished is transmitted, and if a signal indicating that the fire is extinguished is received from the sensor, the solenoid valve is closed. A sprinkler system characterized in that when a signal indicating that a fire is extinguished is not received from a sensor, an electromagnetic valve is made to take an open state. (2) A water source, a pipe that supplies the water stored in the water source with a sprinkler pump, and an automatic system installed in the pipe that detects changes in the reduced pressure or water flow of the water supplied into the pipe and issues an alarm upon sensing. Water is supplied from the alarm valve and the pipe via an automatic alarm valve, and a sprinkler head installed indoors that sprays water in the pipe when it detects the occurrence of a fire, and a sprinkler head that is connected to the pipe and enters the pipe from outside. A water inlet for replenishing water as needed, a firefighting auxiliary tank connected to the piping and supplying water to the piping, a piping on the sprinkler head side from the sprinkler pump, and a piping on the sprinkler head side from the firefighting auxiliary tank. An electromagnetic valve that normally leaves the valve in the open state, a sensor that detects the occurrence of a fire installed in the facility where sprinkler equipment is installed, and an electromagnetic valve that is installed near the water inlet and that allows the solenoid valve to take the open state. It consists of a valve switch and a control means connected to a sensor and an electromagnetic valve, and the control means closes the electromagnetic valve at regular intervals after the sprinkler head is activated, and transmits a signal from the sensor indicating that the fire is extinguished. detects the presence or absence of the fire, and if it receives a signal from the sensor indicating that the fire has been extinguished, the solenoid valve closes, and if it does not receive a signal from the sensor indicating that the fire is extinguished, the solenoid valve closes. Sprinkler equipment characterized by the ability to change the state. (3) A water source, a pipe to which the water stored in the water source is supplied by a sprinkler pump, and an automatic system that is installed in the pipe and detects changes in the reduced pressure or water flow of the water supplied into the pipe and issues an alarm upon sensing. An alarm valve, a sprinkler head installed indoors that supplies water from the pipes via an automatic alarm valve, and sprays water in the pipes when it detects the occurrence of a fire, and a sprinkler head that is connected to the pipes and enters the pipes from outside. A water inlet that allows water to be replenished as needed, a solenoid valve that is installed in the piping close to an automatic alarm valve and which is normally kept open, and a fire alarm installed in a facility where sprinkler equipment is installed. It consists of a sensor that detects the water supply, an electromagnetic valve switch that is installed near the water inlet and can cause the electromagnetic valve to take an open state, and a control means that is connected to the sensor and the electromagnetic valve. The solenoid valve is closed at regular intervals, the sensor detects whether a signal indicating that the fire has been extinguished is transmitted, and if a signal indicating that the fire is extinguished is received from the sensor, the solenoid valve is closed. A sprinkler system characterized in that when a signal indicating that a fire is extinguished is not received from a sensor, an electromagnetic valve is made to take an open state. (4) A water source, a pipe to which the water stored in the water source is supplied by a sprinkler pump, and an automatic system that is installed in the pipe and detects changes in the reduced pressure or water flow of the water supplied into the pipe and issues an alarm upon sensing. Water is supplied from the alarm valve and the pipe via an automatic alarm valve, and a sprinkler head installed indoors that sprays water in the pipe when it detects the occurrence of a fire, and a sprinkler head that is connected to the pipe and enters the pipe from outside. A water inlet that replenishes water when necessary, an auxiliary tank for firefighting that is connected to the piping and supplies water to the piping, and an electromagnetic tank that is installed in the piping close to the automatic alarm valve and the valve is normally kept open. A valve, a sensor to detect the occurrence of a fire installed in a facility where sprinkler equipment is installed,
It consists of a solenoid valve switch installed near the water inlet and capable of opening the solenoid valve, and a control means connected to the sensor and the solenoid valve.The control means switches the solenoid valve at regular intervals after the sprinkler head is activated. Closed state, detects whether or not a signal is transmitted from the sensor indicating that the fire is extinguished, and if a signal indicating that the fire is extinguished is received from the sensor, the solenoid valve is closed, and the sensor indicates that the fire is extinguished. A sprinkler system characterized in that a solenoid valve is caused to take an open state if a transmission of a signal indicating an indication is not received.