A control structure for a fire alarm valve

Abstract

This utility model discloses a control structure for a fire alarm valve, including a fire alarm valve and a PLC. The fire alarm valve has a system side and a water supply side at its upper and lower ends, respectively, and a pressure switch is provided on the left side. The pressure switch is connected to the PLC. The water supply side is equipped with a first connecting pipe and a second connecting pipe. The first connecting pipe is equipped with a first water pump and a first solenoid valve. The second connecting pipe is equipped with a second solenoid valve. A third connecting pipe is installed at the end of the water supply side, and a second water pump and a third solenoid valve are installed on the third connecting pipe. This utility model adds a PLC to one end of the pressure switch of the fire alarm valve. The fire water tank, fire pool, and water pump connection are respectively equipped with a first solenoid valve, a third solenoid valve, and a second solenoid valve on the water supply side, which are controlled and connected to the PLC. This allows the water source in the fire pool to be used first, then the water source in the fire tank, and finally the water source outside the water pump connection, ensuring a water supply. The PLC has four timer switches, which can realize timed water supply and automatic switching between the fire pool and the fire tank.

Description

Technical Field

[0001] This utility model relates to the field of fire-fighting equipment technology, and more specifically to a control structure for a fire alarm valve. Background Technology

[0002] A fire alarm valve is a one-way valve that allows water to flow into a sprinkler system in only one direction and triggers an alarm at a specified flow rate. In a wet alarm valve, the water pressure before and after the valve disc is equal under normal conditions. Due to the weight of the valve disc and the difference in the total water pressure before and after it, the valve disc is in a closed state (the total pressure above the valve disc is greater than the total pressure below the valve core). Currently, fire alarm valves play an important role in modern society, but their installation structure is relatively fixed. Typically, one end of the fire alarm valve is connected to a water supply pipe. In case of fire, a pressure switch activates a water pump, which then transports fire water from the fire pool to the system side for fire extinguishing. This installation structure is very common, but a problem exists in practical application: when the fire water in the fire pool is drained, the sprinkler heads at the end have no water to spray, delaying fire suppression. Current solutions include using fire water tanks and pump connections for secondary water supply, but there is no good control structure for switching water sources between the fire pool, fire water tank, and pump connection, leading to operational errors and delays in fire suppression. To address this, the inventors propose a control structure for a fire alarm valve. By installing an electronic switch at one end of the fire water tank, fire water reservoir, and water pump connection, and controlling the electronic switch through a control device, the fire extinguishing system can switch the water supply source to ensure rapid fire extinguishing operations.

[0003] To control the water flow of fire alarm valves and ensure the rational use of fire-fighting water while avoiding waste, Chinese Patent (Authorization Announcement No.: CN216629521U) discloses a fire alarm valve device capable of controlling water flow. This utility model includes an alarm valve, with several water supply pipes fixedly connected to its outer surface. Several support frames are fixedly connected to the outer surfaces of the water supply pipes, and a receiving ring is fixedly connected to the outer surface of each support frame. A connecting shaft is rotatably connected to the outer surface of the receiving ring, and a connecting sleeve is sleeved on the outer surface of the connecting shaft. This utility model can control the water flow of fire-fighting water pipes, facilitating fire suppression and disaster relief.

[0004] The solution still has some shortcomings in application. When a fire occurs, the water supply needs to use a water pump and fire water to open the valve so that the fire water can be sprayed through the sprinkler heads to extinguish the fire. Therefore, the water flow of the fire alarm valve must maintain sufficient water flow and pressure to ensure the normal spraying of the sprinkler heads. In addition, the spraying time of the sprinkler heads is determined according to the fire situation and can be long or short. Therefore, it is necessary to have a sufficient water source. Otherwise, insufficient water supply can easily affect fire extinguishing. Therefore, the control structure of the fire alarm valve needs to be improved so that it can control different water sources to ensure sufficient water flow and pressure and maximize the fire extinguishing effect. Utility Model Content

[0005] This utility model discloses a control structure for a fire alarm valve, the main purpose of which is to overcome the above-mentioned deficiencies and shortcomings of the existing technology.

[0006] The technical solution adopted in this utility model is as follows:

[0007] A control structure for a fire alarm valve includes a fire alarm valve and a PLC. The fire alarm valve has a system side and a water supply side at its upper and lower ends, respectively, and an integrally connected delay device, hydraulic alarm bell, and pressure switch are installed on its left side. The pressure switch is connected to the PLC. The water supply side is equipped with an upper tee fitting and a lower tee fitting. One end of the upper tee fitting and the lower tee fitting are respectively provided with a first connecting pipe and a second connecting pipe. The ends of the first connecting pipe and the second connecting pipe are respectively equipped with a fire water tank and a water pump connection. The first connecting pipe is equipped with a first water pump and a first solenoid valve, and the second connecting pipe is equipped with a second solenoid valve. The end of the water supply side is equipped with a third connecting pipe, on which a second water pump and a third solenoid valve are installed.

[0008] Furthermore, a fire water tank is provided at the other end of the second water pump, and the water pump is connected to the fire water tank.

[0009] Furthermore, the PLC is equipped with four timer switches at its lower part. Each timer switch has a time display screen and a control switch. The first water pump, the first solenoid valve, the second water pump, and the third solenoid valve are respectively connected to the timer switches.

[0010] Furthermore, the lower inner side of the fire water tank and the fire water pool are respectively equipped with a first water level sensor and a second water level sensor, both of which are connected to the PLC.

[0011] Furthermore, the fire alarm valve is equipped with a system-side pressure gauge and a water supply-side pressure gauge on its right side.

[0012] Furthermore, the PLC is equipped with a touch screen display on its upper part.

[0013] As can be seen from the above description of this utility model, compared with the prior art, the advantages of this utility model are as follows:

[0014] This invention first adds a PLC to one end of the pressure switch of the fire alarm valve. Simultaneously, a fire water tank, a fire pool, and a pump connection are installed on the water supply side to prepare for subsequent water source control. Next, a first solenoid valve, a third solenoid valve, and a second solenoid valve are respectively installed on the fire water tank, fire pool, pump connection, and water supply side. These three solenoid valves are connected to the PLC control system. This setup enables rapid water source switching control, allowing the use of water from the fire pool first, then from the fire water tank, and finally from the external water source of the pump connection. This achieves optimized water supply control on the water supply side, is highly practical, ensures water supply to the system, and is beneficial for firefighting operations. Finally, four timer switches are installed below the PLC, connected to the first pump, the first solenoid valve, the second pump, and the third solenoid valve respectively. This setup enables timed water supply to the fire pool and fire tank, achieving automated water source switching. It is suitable for unattended operation. This invention enables rapid water source switching for the fire alarm valve, allowing for both timed and manual switching. Its ingenious design is highly practical and suitable for widespread adoption. Attached Figure Description

[0015] Figure 1 This is a schematic diagram of the structure of this utility model.

[0016] Figure 2 This is a schematic diagram of the PLC connection structure of this utility model. Detailed Implementation

[0017] The specific embodiments of this utility model will be further described below with reference to the accompanying drawings.

[0018] like Figure 1 and Figure 2 As shown, a control structure for a fire alarm valve includes a fire alarm valve 1 and a PLC 2. The fire alarm valve 1 has a system side 3 and a water supply side 4 at its upper and lower ends, respectively, and a delay device 5, a hydraulic alarm bell 6, and a pressure switch 7 are integrally connected on its left side. The pressure switch 7 is connected to the PLC 2. The water supply side 4 is equipped with an upper tee fitting 8 and a lower tee fitting 9. One end of the upper tee fitting 8 and the lower tee fitting 9 is respectively provided with a first connecting pipe 10 and a second connecting pipe 11. The ends of the first connecting pipe 10 and the second connecting pipe 11 are respectively provided with a fire water tank 12 and a water pump connection 13. The first connecting pipe 10 is equipped with a first water pump 14 and a first solenoid valve 15. The second connecting pipe 11 is equipped with a second solenoid valve 16. The end of the water supply side 4 is equipped with a third connecting pipe 17, on which a second water pump 18 and a third solenoid valve 19 are installed.

[0019] Furthermore, the other end of the second water pump 18 is provided with a fire water tank 20, and the water pump 18 is connected to the fire water tank 20.

[0020] Furthermore, the lower part of the PLC 2 is equipped with four timer switches 21, each timer switch 21 having a time display screen 22 and a control switch 23. The first water pump 14, the first solenoid valve 15, the second water pump 18, and the third solenoid valve 19 are respectively connected to the timer switches 21.

[0021] Furthermore, the lower inner sides of the fire water tank 12 and the fire water pool 20 are respectively equipped with a first water level sensor 24 and a second water level sensor 25, both of which are connected to the PLC2.

[0022] Furthermore, the fire alarm valve 1 is equipped with a system-side pressure gauge 26 and a water supply-side pressure gauge 27 on its right side.

[0023] Furthermore, the PLC 2 is equipped with a touch screen display 28 on its upper part.

[0024] Example 1: First, the four timer switches 21 are in the off state. When a fire occurs, the information is transmitted to PLC 2 through pressure switch 7. PLC 2 first starts the second water pump 18 and the third solenoid valve 19. The second water pump 18 draws water from the fire pool 20 to the fire alarm valve 1 and then through the valve disc into the system side 3. Next, when the second water level sensor 25 senses that the water level in the fire pool 20 is insufficient, PLC 2 first shuts off the second water pump 18 and the third solenoid valve 19, and then starts the first water pump 14 and the first solenoid valve 15 to supply water using the water in the fire water tank 12. Closing the third solenoid valve 19 can prevent water from flowing into the fire pool 20. Finally, when the first water level sensor 24 senses that the water level in the fire water tank 12 is insufficient, the first water pump 14 and the first solenoid valve 15 are shut off, and the second solenoid valve 16 is started to supply water through the water pump connector 13. The switching is performed in sequence.

[0025] Example 2: First, the four timer switches 21 are in the open state. When a fire occurs, the information is transmitted to PLC 2 via pressure switch 7. 2. First, start the second water pump 18 and the third solenoid valve 19. The second water pump 18 draws water from the fire pool 20 to the fire alarm valve 1 and then through the valve disc to enter the system side 3. Next, set the closing time according to the total amount of water in the fire pool 20. When the set time is reached, the second water pump 18 and the third solenoid valve 19 are closed through the timer switch 21. The first water pump 14 and the first solenoid valve 15 are started through the timer switch 21 to switch the water source to the fire water tank 12. When the set time is reached, the first water pump 14 and the first solenoid valve 15 are closed through the timer switch 21. Finally, after the first solenoid valve 15 and the third solenoid valve 18 are closed, the timer switch 21 opens the second solenoid valve 16 to facilitate external water supply by firefighters through the water pump coupling 13. During operation, the first water pump 14, the first solenoid valve 15, the second water pump 18, the third solenoid valve 19 and the second solenoid valve 16 can be manually started and stopped through the touch screen 28 to achieve the best control structure.

[0026] As can be seen from the above description of this utility model, compared with the prior art, the advantages of this utility model are as follows:

[0027] This invention first adds a PLC to one end of the pressure switch of the fire alarm valve. Simultaneously, a fire water tank, a fire pool, and a pump connection are installed on the water supply side to prepare for subsequent water source control. Next, a first solenoid valve, a third solenoid valve, and a second solenoid valve are respectively installed on the fire water tank, fire pool, pump connection, and water supply side. These three solenoid valves are connected to the PLC control system. This setup enables rapid water source switching control, allowing the use of water from the fire pool first, then from the fire water tank, and finally from the external water source of the pump connection. This achieves optimized water supply control on the water supply side, is highly practical, ensures water supply to the system, and is beneficial for firefighting operations. Finally, four timer switches are installed below the PLC, connected to the first pump, the first solenoid valve, the second pump, and the third solenoid valve respectively. This setup enables timed water supply to the fire pool and fire tank, achieving automated water source switching. It is suitable for unattended operation. This invention enables rapid water source switching for the fire alarm valve, allowing for both timed and manual switching. Its ingenious design is highly practical and suitable for widespread adoption.

[0028] The above are merely specific embodiments of this utility model, but the design concept of this utility model is not limited thereto. Any non-substantial improvements made to this utility model using this concept should be considered as infringing on the protection scope of this utility model.

Claims

1. A control structure for a fire alarm valve, characterized by: The system includes a fire alarm valve and a PLC. The fire alarm valve has a system side at its upper end and a water supply side at its lower end, and an integrated delay device, a hydraulic alarm bell, and a pressure switch are installed on its left side. The pressure switch is connected to the PLC. The water supply side is equipped with an upper tee fitting and a lower tee fitting. One end of the upper tee fitting and the lower tee fitting are respectively provided with a first connecting pipe and a second connecting pipe. The ends of the first connecting pipe and the second connecting pipe are respectively provided with a fire water tank and a water pump connection. The first connecting pipe is equipped with a first water pump and a first solenoid valve. The second connecting pipe is equipped with a second solenoid valve. The end of the water supply side is equipped with a third connecting pipe, which is equipped with a second water pump and a third solenoid valve.

2. The control structure of a fire alarm valve according to claim 1, characterized in that: The other end of the second water pump is equipped with a fire water tank, and the water pump is connected to the fire water tank.

3. The control structure of a fire alarm valve according to claim 1, characterized in that: The PLC is equipped with four timer switches at its lower part. Each timer switch has a time display screen and a control switch. The first water pump, the first solenoid valve, the second water pump, and the third solenoid valve are respectively connected to the timer switches.

4. The control structure of a fire alarm valve according to claim 2, characterized in that: The lower inner side of the fire water tank and the fire water pool are respectively equipped with a first water level sensor and a second water level sensor, and both the first water level sensor and the second water level sensor are connected to the PLC.

5. The control structure of a fire alarm valve according to claim 1, characterized in that: The fire alarm valve is equipped with a system-side pressure gauge and a water supply-side pressure gauge on its right side.

6. The control structure of a fire alarm valve according to claim 1, characterized in that: The PLC is equipped with a touch screen display on its upper part.

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