Automatic inspection system for high-pressure fire pump

Abstract

The utility model discloses an automatic inspection system for a high-pressure fire pump, which comprises a high-pressure electric pump body, the input end of the high-pressure electric pump body is connected with the front end of a microcomputer comprehensive protector, the rear end of the microcomputer comprehensive protector is connected with a 10KV bus through a vacuum circuit breaker A, and the rear end of the microcomputer comprehensive protector is also connected with the front end of a vacuum circuit breaker B; the rear end of the vacuum circuit breaker B is sequentially connected with a low-voltage frequency converter VF and a plastic circuit breaker in series and then is connected with a 380v bus; and the vacuum circuit breaker A, the vacuum circuit breaker B and the low-voltage frequency converter VF are connected to the same human-computer interface controller. According to the scheme, the low-voltage frequency converter is used for performing low-speed inspection on the high-voltage electric pump, so that the high-voltage electric pump is kept in an intact and to-be-operated state at any time, and a stable and reliable water supply system is provided for fire fighting; and the vacuum circuit breaker A or the vacuum circuit breaker B is locked, so that only one vacuum circuit breaker A or the vacuum circuit breaker B can operate, and the safety of the whole system is improved.

Description

Technical Field

[0001] The utility model relates to the technical field of fire pump inspection, in particular to an automatic inspection system for a high-pressure fire pump. Background Art

[0002] The fire pumps of the fire water supply system include pressure-stabilizing pumps, diesel pumps and high-pressure electric pumps. In order to ensure that the fire extinguishing system has a reliable water supply system, it is necessary to ensure that all fire pump equipment is in good condition (including motors and pumps, which cannot be corroded and stuck) and can be started normally. In order to ensure that the equipment is in good condition, it needs to be operated or inspected (operated regularly), so inspections (operated regularly) are very necessary. Among them, the pressure-stabilizing pump will start and stop frequently. Through the changes in the pressure of the pipe network, the integrity of the pressure-stabilizing pump can be directly observed. Diesel pumps are generally equipped with a complete set of control systems (including batteries, oil stations, and control distribution cabinets). They have automatically equipped PLC control systems and human-machine interfaces, and have idling, acceleration, operation records and automatic inspection start functions. The inspection start time can be set by yourself, so the integrity of the diesel pump can be checked by calling it out through the human-machine interface.

[0003] The only problem is that high-voltage electric pumps cannot be directly observed and do not have a suitable automatic inspection system. When constructing some projects, fire pump manufacturers will be asked to configure automatic inspection systems for high-voltage electric pumps. For example, they will be started every half month. However, for high-voltage (10kV) electric pumps, the starting inertia is also large, the mechanical impact and wear are large, and the delivery volume is large when started once. Before the purpose of automatic inspection is achieved, the pipeline pressure reaches the upper limit and stops, which is not practical. Therefore, it is necessary to design an automatic inspection system with low-speed inspection and less damage to high-voltage electric pumps. Summary of the invention

[0004] In order to solve the technical problem of regular low-speed inspection of the integrity of a high-pressure electric pump, the utility model provides an automatic inspection system for a high-pressure fire pump.

[0005] The technical solution is as follows:

[0006] A high-voltage fire pump automatic inspection system includes a high-voltage electric pump body. The key point is that the input end of the high-voltage electric pump body is connected to the front end of a microcomputer integrated protector, and the rear end of the microcomputer integrated protector is connected to a 10KV busbar via a vacuum breaker A. The rear end of the microcomputer integrated protector is also connected to the front end of a vacuum breaker B, and the rear end of the vacuum breaker B is connected to a 380V busbar after being serially connected to a low-voltage inverter VF and a plastic circuit breaker.

[0007] With the above structure, the manual start or manual inspection of the high-voltage electric pump can be achieved through the vacuum breaker A or the vacuum breaker B. The low-voltage inverter has the ability to change the motor speed, so that the high-voltage electric pump can run at a low speed without delivering water, with small mechanical impact and small wear of the high-voltage electric pump.

[0008] Preferably, the vacuum breaker A, vacuum breaker B and low-voltage frequency converter VF are connected to the same human-machine interface controller.

[0009] Preferably, the human-machine interface controller is connected to the vacuum breaker A and the vacuum breaker B via a logic gate circuit.

[0010] The above structure can avoid conflicts between starting the high-voltage electric pump and automatic inspection when a fire occurs, and the vacuum breaker A and the vacuum breaker B can be closed at the same time, so as to prevent the 10kV high voltage from reaching the inverter through the vacuum breaker A and the vacuum breaker B, thereby preventing the low-voltage inverter from being burned due to the access to high voltage, and even preventing the high voltage discharge caused by the small insulation distance between the phase lines of the low-voltage line, which may cause the electrical equipment to burn.

[0011] Preferably, the logic gate circuit comprises a primary NAND gate, a secondary first AND gate and a secondary second AND gate, wherein two input pins of the primary NAND gate are respectively connected to output terminals a and b of the human-machine interface controller, an output pin of the primary NAND gate is connected to an input pin of the secondary first AND gate, another input pin of the secondary first AND gate is connected to output terminal a of the human-machine interface controller, and the output terminal of the secondary first AND gate is connected to vacuum breaker A;

[0012] The output pin of the primary NAND gate is also connected to an input pin of the secondary second AND gate, the other input pin of the secondary second AND gate is connected to the output terminal b of the human-machine interface controller, and the output terminal of the secondary second AND gate is connected to the vacuum breaker B.

[0013] With the above structure, when the high-voltage electric pump is started and the automatic inspection occurs at the same time, the primary NAND gate outputs a low current, the secondary AND gate outputs a low current, and the vacuum breaker A and the vacuum breaker B are disconnected and stopped at the same time. Only when the high-voltage electric pump is started or the automatic inspection occurs separately, the primary NAND gate outputs a high current, the secondary AND gate outputs one high and one low current, and the corresponding vacuum breakers are connected and work normally.

[0014] In normal standby state, vacuum circuit breaker A and vacuum circuit breaker B are both disconnected and in hot standby state, i.e., ready for operation. When the high-voltage electric pump is started (manual start is started by the operator's on-site operation box, and automatic start is initiated by a command from the pressure controller, automatically starts at 0.7Mpa and automatically stops at 1.4Mpa), vacuum circuit breaker A closes to supply power to the motor, starts the high-voltage electric pump, and automatically stops when the operation reaches the upper limit, or stops manually when the on-site operator stops. At this time, vacuum circuit breaker A opens and disconnects.

[0015] When an automatic inspection is required (this is the time set by the engineer on the human-machine interface of the inspection cabinet, such as an automatic inspection every half a month), the human-machine interface controller receives the inspection signal, outputs a start signal to the low-voltage inverter VF, and simultaneously closes the vacuum circuit breaker B to supply power to the motor of the high-voltage electric pump. After 1 to 2 minutes, the human-machine interface controller outputs a stop signal to the low-voltage inverter VF, and simultaneously disconnects the vacuum circuit breaker B, completing the inspection and generating a report to transmit to the human-machine interface.

[0016] Compared with the prior art, the utility model has the following beneficial effects:

[0017] An automatic inspection system for high-voltage fire pumps adopts the above technical solution. The low-voltage inverter realizes low-speed inspection of the high-voltage fire pump by changing the motor speed, avoiding the direct full-speed start of the high-voltage motor with a 10kV power supply, reducing the impact and mechanical wear during startup; the vacuum breaker A or vacuum breaker B can be used to realize manual start or manual inspection of the high-voltage electric pump; the vacuum breaker A or vacuum breaker B is locked through the logic gate circuit so that only one can be operated, thereby improving the safety of the entire system. The high-voltage electric pump is kept intact and ready to operate at any time, providing a stable and reliable water supply system for fire fighting; BRIEF DESCRIPTION OF THE DRAWINGS

[0018] Figure 1 This is a cabinet schematic diagram of the automatic inspection system;

[0019] Figure 2 This is the power distribution system diagram for the automatic inspection system;

[0020] Figure 3 A circuit diagram for a logic gate circuit. DETAILED DESCRIPTION

[0021] The utility model is further described below in conjunction with embodiments and drawings.

[0022] like Figure 1 , Figure 2As shown, a high-voltage fire pump automatic inspection system mainly includes a high-voltage electric pump body 1, a high-voltage electric pump distribution cabinet and a high-voltage electric pump inspection cabinet. The high-voltage electric pump body 1 is located in the high-voltage electric pump distribution cabinet. The input end of the high-voltage electric pump body 1 is connected to the front end of a microcomputer integrated protector 2, and the rear end of the microcomputer integrated protector 2 is connected to a 10KV busbar via a vacuum breaker A3.

[0023] The high-voltage electric pump inspection cabinet is provided with a vacuum breaker B4, the front end of which is connected to the rear end of the microcomputer integrated protector 2, and the rear end of the vacuum breaker B4 is connected in series with a low-voltage inverter VF5 and a plastic circuit breaker 6 in sequence, and then connected to a 380V busbar.

[0024] The vacuum breaker A3, vacuum breaker B4 and low voltage frequency converter VF5 are connected to the same human-machine interface controller 7.

[0025] like Figure 3 As shown, the output terminal a and the output terminal b of the human-machine interface controller 7 are respectively connected to the two input pins of the first-level NAND gate 8, the output pin of the first-level NAND gate 8 is connected to an input pin of the second-level first AND gate 9, the other input pin of the second-level first AND gate 9 is connected to the output terminal a of the human-machine interface controller 7, the output terminal of the second-level first AND gate 9 is connected to the vacuum breaker A3, the output pin of the first-level NAND gate 8 is also connected to an input pin of the second-level second AND gate 10, the other output pin of the second-level second AND gate 10 is connected to the output terminal b of the human-machine interface controller 7, the output terminal of the second-level second AND gate 10 is connected to the vacuum breaker B4, the vacuum breaker A3 and the vacuum breaker B4 are locked with each other, and only one can be operated.

[0026] When automatic inspection is required, the human-machine interface controller 7 receives the inspection signal, outputs a start signal to the low-voltage frequency converter VF5, and simultaneously closes the vacuum circuit breaker B4 to supply power to the motor of the high-voltage electric pump. After 1 to 2 minutes, the human-machine interface controller 7 outputs a stop signal to the low-voltage frequency converter VF5, and simultaneously disconnects the vacuum circuit breaker B, completing the inspection and generating a report to be transmitted to the human-machine interface.

[0027] Finally, it should be noted that the above description is only a preferred embodiment of the present invention. Under the guidance of the present invention, ordinary technicians in this field can make a variety of similar expressions without violating the purpose and claims of the present invention, and such changes fall within the scope of protection of the present invention.

Claims

1. A high-pressure fire pump automatic inspection system, comprising a high-pressure electric pump body (1), characterized in that: The input end of the high-voltage electric pump body (1) is connected to the front end of a microcomputer integrated protector (2), and the rear end of the microcomputer integrated protector (2) is connected to a 10KV busbar via a vacuum breaker A (3). The rear end of the microcomputer integrated protector (2) is also connected to the front end of a vacuum breaker B (4), and the rear end of the vacuum breaker B (4) is connected in series with a low-voltage frequency converter VF (5) and a plastic circuit breaker (6) and then connected to a 380V busbar.

2. The automatic inspection system for high-pressure fire pumps according to claim 1 is characterized in that: The vacuum breaker A (3), vacuum breaker B (4) and low-voltage frequency converter VF (5) are connected to the same human-machine interface controller (7).

3. The automatic inspection system for high-pressure fire pumps according to claim 2 is characterized in that: The human-machine interface controller (7) is connected to the vacuum breaker A (3) and the vacuum breaker B (4) via a logic gate circuit.

4. The automatic inspection system for high-pressure fire pumps according to claim 3 is characterized in that: The logic gate circuit comprises a primary NAND gate (8), a secondary first AND gate (9) and a secondary second AND gate (10), wherein two input pins of the primary NAND gate (8) are respectively connected to an output terminal a and an output terminal b of a human-machine interface controller (7), an output pin of the primary NAND gate (8) is connected to an input pin of the secondary first AND gate (9), another input pin of the secondary first AND gate (9) is connected to an output terminal a of the human-machine interface controller (7), and an output terminal of the secondary first AND gate (9) is connected to a vacuum breaker A (3); The output pin of the primary NAND gate (8) is also connected to an input pin of the secondary second AND gate (10), the other input pin of the secondary second AND gate (10) is connected to the output terminal b of the human-machine interface controller (7), and the output terminal of the secondary second AND gate (10) is connected to the vacuum breaker B (4).

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