A new fire pump station

Abstract

The present application relates to a new type of fire pump station, a small power water pump group is added in the fire pipe network to supply water for pipe network leakage or small water consumption, which avoids energy loss caused by large displacement water pump group for small water consumption. A large capacity energy storage tank is arranged in the pipe network, when the pipe network water pressure increases, the energy storage tank recovers and stores the surplus energy and pressure, when the pipe network water pressure decreases due to sudden water consumption, the energy storage tank instantaneously supplements a certain amount of high pressure water to the pipe network, which adjusts the pipe network water pressure in real time, and realizes stable and reliable pipe network water pressure. The present application has the advantages of unique design, safe and reliable pipe network, high efficiency and energy saving.

Description

Technical Field

[0001] This invention relates to a novel fire pump station, and more particularly to a fire pump station that utilizes automatic water pressure control for fire pipelines to replenish water, belonging to the field of fire equipment technology. Background Technology

[0002] The main equipment of a fire pump station is a large water pump set, typically configured with two sets, one in operation and the other as a backup. In practical applications, to ensure stable water pressure in the pipe network, a water usage signal switch is installed at each fire water point to transmit water usage information to the pump station control cabinet in real time, controlling the operation of the water pump set. However, large water pump sets waste significant energy when supplementing small water usage volumes. The biggest drawback is that aging signal transmission components or damaged wiring can lead to control failures. Furthermore, excess water supplied due to pump delays must flow back to the water tank via overflow pipes, wasting energy. Therefore, a reliable and energy-efficient fire pump station needs to be designed to overcome these shortcomings. Summary of the Invention

[0003] To address the problems in the background art, this invention proposes a novel fire pump station that incorporates a low-power pump set and a large-capacity energy storage tank within the water supply pipeline. By utilizing the water pressure of the pipeline network to control the start and stop of different pump sets, the aim is to achieve stable water pressure in the fire protection pipeline network and save energy.

[0004] To achieve the above objectives, this invention proposes a novel fire pump station, comprising: a pump set, a piping network, a PLC controller, and a power supply. The pump set includes two high-capacity pumps, one of which is in operation and the other is on standby. The piping network includes water pipes, water valves, pressure sensors, and fire hoses, all connected together via water pipes. The power supply includes grid power and self-generated power. The invention is characterized by: A small-power water pump set is added to the pipeline network and connected in parallel with the two large-displacement water pump sets. The low-power water pump set is used to supplement the pipeline network with small amounts of water and to cover leaks. A large-capacity energy storage tank is added to the pipeline network and connected in parallel in the fire protection pipeline network; The energy storage tank stores excess water or replenishes water instantaneously in the pipeline network, and regulates the water pressure of the pipeline network in real time; The water pump unit is equipped with a pressure switch, and the pressure switch and pressure sensor are electrically connected to the PLC controller; The pipeline water pressure controls the start and stop of the water pump set, and sets the pipeline water pressure range for each water pump set during operation; The PLC controller controls the start and stop of the corresponding water pump group based on the pipeline water pressure information measured by the pressure sensor. Let the water pressure in the pipeline where the small-power water pump set operates be P1 to P2, and P1 > P2; The pipe network water pressure for the operation of the large-displacement pump set is Q1 to Q2, and Q1>Q2, P2≥Q1, When the pipe network water pressure ≤ P1, the low-power pump set is started, and the pipe network water pressure rises or continues to drop: if the pipe network water pressure rises to ≥ P1, the low-power pump set stops; if the pipe network water pressure drops to ≤ P2, the low-power pump set stops and switches to the large-displacement pump set for starting; When the pipe network water pressure drops to ≤ P2, the large-displacement pump set is started, and the pipe network water pressure rises or continues to drop: if the pipe network water pressure drops to < Q2, the large-displacement pump set continues to supply water; if the pipe network water pressure rises to ≥ Q1, the large-displacement pump set stops and switches to the low-power pump set to supply water again.

[0005] Further, a plurality of said energy storage tanks are provided and arranged in parallel in said pipe network.

[0006] Preferably, said energy storage tanks are arranged in areas with large water consumption of the pipe network.

[0007] Further, a plurality of said low-power pump sets are provided and arranged in areas with frequent water consumption of the pipe network.

[0008] Further, a pressure sensor is provided on said energy storage tank.

[0009] In the present invention, a low-power pump set is additionally arranged in the fire-fighting pipe network to supply water for pipe network leakage compensation or when the pipe network has small water consumption, which avoids energy loss caused by the large-displacement pump set supplying water for small water consumption. A large-capacity energy storage tank is arranged in the pipe network: when the pipe network water pressure increases, the energy storage tank recovers and stores surplus energy and pressure; when the pipe network water pressure drops due to sudden water use, the energy storage tank instantaneously supplies a certain amount of high-pressure water to the pipe network, adjusts the pipe network water pressure in real time, and realizes stable and reliable pipe network water pressure.

[0010] The present invention has the advantages of unique design, safe and reliable pipe network, high efficiency and energy saving. Description of Drawings

[0011] The accompanying Figure 1 drawing is a working principle diagram of the present invention.

[0012] In the accompanying drawings, 1 is a large-displacement pump set, 1' is a standby large-displacement pump set, 2 is an energy storage tank, 3 is a pressure sensor, 4 is a main outlet pipe, 5 is a control cabinet, 6 is a generator, 7 is a low-power pump set, 8 is an outlet pipe of the large-displacement pump set, 8' is an outlet pipe of the standby large-displacement pump set, 9 and 9' are pressure sensors, A is a water inlet, and a, b, c, d, e, f, g are on-off valves. Detailed Description of Embodiments

[0013] The accompanying Figure 1 drawing shows an embodiment configured with one large-displacement pump set 1, one standby large-displacement pump set 1' and one low-power pump set 7.

[0014] As attached Figure 1 As shown, the inlet pipes of the small-power water pump group 7, the large-displacement water pump group 1, and the standby large-displacement water pump group 1' are all connected to inlet A. A switch valve a is installed on the inlet pipe of the large-displacement water pump group 1, a switch valve f is installed on the inlet pipe of the standby large-displacement water pump group 1', and a switch valve g is installed on the inlet pipe of the small-power water pump group 7. The outlet pipes 8 of the large-displacement water pump group 1, 8 of the standby large-displacement water pump group 1', and 7 of the small-power water pump group are connected to the main outlet pipe 4, meaning that the outlet pipes 8 of the large-displacement water pump group 1, 8 of the standby large-displacement water pump group 1', and 7 of the small-power water pump group converge into a single main outlet pipe 4. A switch valve b is installed on the outlet pipe 8 of the large-displacement water pump group 1, a switch valve d is installed on the outlet pipe 8 of the standby large-displacement water pump group 1', and a switch valve e is installed on the outlet pipe of the small-power water pump group 7. A switch valve c is installed between the outlet pipe 8 of the large-displacement water pump set 1 and the outlet pipe 8' of the standby large-displacement water pump set 1'. The energy storage tank 2 is connected to the main outlet pipe 4. When the water pressure in the pipeline increases, the water in the outlet pipe 4 is stored in the energy storage tank 2. When the water pressure in the pipeline decreases, the water in the energy storage tank 2 flows to the outlet pipe 4.

[0015] Appendix Figure 1 In the pipeline network shown, the maximum network pressure is set to 0.35 MPa. The operating pressure of the small-power water pump set 7 is 0.35 MPa to 0.33 MPa. When the water pressure in the network is less than 0.35 MPa, the small-power water pump set 7 starts supplying water; when the water pressure in the network is greater than 0.35 MPa, the small-power water pump set 7 stops supplying water. When the water pressure in the network is less than 0.33 MPa, the small-power water pump set 7 stops supplying water, and the large-displacement water pump set 1 starts supplying water to the network. When the water pressure in the network is greater than 0.33 MPa, the large-displacement water pump set 1 stops, and the small-power water pump set 7 starts supplying water. Under normal circumstances, pipeline leakage or small-scale water use will cause a slight decrease in the water pressure in the network, with the pressure dropping slightly from 0.35 MPa. However, the water pressure in the network will still be higher than 0.33 MPa. In this case, starting the small-power water pump set 7 to supply supplementary water to the network will stabilize the network water pressure. In special circumstances requiring a large amount of water, the water pressure in the pipeline network drops sharply to below 0.33 MPa. The large-capacity water pump unit 1 then starts to supply water to the pipeline network, meeting its water demand. During this process, the PLC controller located in control cabinet 5 instructs the corresponding water pump unit to start and stop based on the real-time water pressure information measured by pressure sensors 3, 9, or 9' and the set start / stop pressure ranges for different water pump units.

[0016] When the large-displacement water pump set 1 is under maintenance, the standby large-displacement water pump set 1' is activated to supply water to the pipeline network. At this time, the small-power water pump set 7 and the standby large-displacement water pump set 1' are combined to supply water to the pipeline network. The water supply process is the same as that of the combination of small-power water pump set 7 and large-displacement water pump set 1.

[0017] In the attached diagram, both generator 6 and the State Grid are power sources for the fire pump station. When the State Grid fails to supply power, the PLC in control cabinet 5 first instructs generator 6 to generate power and then switches the power supply from the State Grid to generator 6.

Claims

1. A new type of fire pump station, comprising: A water pump set, a pipe network, a PLC controller and a power supply, wherein the water pump set comprises two large-displacement water pump sets, one of which is set as a normal-use pump and the other is set as a standby pump; the pipe network comprises a water pipe, a water valve, a pressure sensor and a fire-fighting nozzle, which are communicated with each other through the water pipe; the power supply comprises a power grid power supply and a self-power-generating power supply, characterized in that: A low-power water pump set is additionally arranged in the pipe network and arranged in parallel with the two large-displacement water pump sets; The low-power water pump set supplements small water consumption and leakage for the pipe network; A large-capacity energy storage tank is additionally arranged in the pipe network and arranged in parallel in the fire-fighting pipe network; The energy storage tank stores excess water for the pipe network or supplies instantaneous water to regulate the water pressure of the pipe network in real time; A pressure switch is arranged on the water pump set, and the pressure switch and the pressure sensor are electrically connected with the PLC controller; The water pressure of the pipe network controls the start and stop of the water pump sets, and a pipe network water pressure interval is set for each water pump set during operation; The PLC controller controls the start and stop of the corresponding water pump set according to the pipe network water pressure information measured by the pressure sensor; It is set that: the pipe network water pressure for the operation of the low-power water pump set is P1 to P2, and P1>P2; the pipe network water pressure for the operation of the large-displacement water pump set is Q1 to Q2, and Q1>Q2, P2≥Q1, when the pipe network water pressure is ≤ P1, the low-power water pump set starts, and the pipe network water pressure rises or continues to drop: if the pipe network water pressure rises to ≥ P1, the low-power water pump set stops; if the pipe network water pressure drops to ≤ P2, the low-power water pump set stops and switches to the large-displacement water pump set for starting; when the pipe network water pressure drops to ≤ P2, the large-displacement water pump set starts, and the pipe network water pressure rises or continues to drop: if the pipe network water pressure drops to < Q2, the large-displacement water pump set continues to supply water; if the pipe network water pressure rises to ≥ Q1, the large-displacement water pump set stops and switches to the low-power water pump set to supply water again.

2. The novel fire pump station according to claim 1, characterized in that: A plurality of energy storage tanks are provided and arranged in parallel in the pipe network.

3. The novel fire pump station according to claim 1, characterized in that: The energy storage tanks are arranged in areas of the pipe network with large water consumption.

4. A novel fire pump station according to claim 1, characterized in that: A plurality of low-power water pump sets are provided and arranged in areas of the pipe network with frequent water use.

5. A novel fire pump station according to claim 1, characterized in that: A pressure sensor is arranged on the energy storage tank.

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