Fire control cabinet capable of detecting faults of water pump

Abstract

The utility model relates to a fire-fighting control cabinet capable of detecting faults of a water pump, which comprises a three-phase electricity meter and current transformers T1, T2 and T3 which are arranged in the fire-fighting cabinet, a 485 communication connection interface is arranged on the three-phase electricity meter, and the 485 communication connection interface is connected with a 485 communication interface reserved by a PLC (Programmable Logic Controller); the current transformer T1 is installed at the L1 phase of an incoming line power supply, the current transformer T2 is installed at the L2 phase of the incoming line power supply, and the current transformer T3 is installed at the L3 phase of the incoming line power supply. According to the utility model, the fault detection range is extended from the power supply output end of the fire-fighting cabinet to the water pump terminal, so that the problem of the fire-fighting water pump is fed back more accurately. According to the utility model, the structural mechanical problem of installation of the rotating speed sensor is not considered, and only equipment needs to be additionally arranged on the fire-fighting cabinet. Electric pump detection current can be used for electric pump overload protection, and an overload protection circuit of the fire-fighting cabinet can be omitted. Parameters such as working voltage and current of the electric pump are displayed in real time, and maintenance is convenient.

Description

Technical Field

[0001] The utility model relates to a fire control cabinet, in particular to a fire control cabinet which can detect water pump faults and extends the fault detection range from a power supply output end of the fire cabinet to a water pump terminal, so as to more accurately feedback problems of the fire pump. Background Art

[0002] Fire pumps are the main equipment for fire water supply. Because of its safety, according to fire regulations, there are usually main and backup fire pumps. When the main fire pump fails and cannot be put into use, it is necessary to switch to the backup fire pump. Therefore, how to accurately detect fire pump failure is an important part related to the stable operation of the equipment.

[0003] However, most fire pump devices currently in use cannot accurately detect pump failures. For example, contactor feedback detection is to detect whether the power output contactor is energized after the pump start command. It can only detect whether the control system is normal, but cannot detect whether the pump is operating normally or whether there are any failures. Therefore, water pump failures basically require regular inspections and maintenance by relevant technicians. This manual inspection method is too backward in an era where automation applications are so advanced. As an electrical complete set of equipment, the fire control cabinet should have this function of automatically and accurately detecting water pump failures.

[0004] Therefore, it is necessary to propose a method for a fire control cabinet to detect water pump failure. Utility Model Content

[0005] In view of the above problems, the main purpose of the utility model is to provide a fire control cabinet that can detect water pump faults and extend the fault detection range from the power output end of the fire cabinet to the water pump terminal, so as to more accurately feedback the fire water pump problems.

[0006] The utility model solves the above technical problems through the following technical solutions: a fire control cabinet capable of detecting water pump failure, the fire control cabinet capable of detecting water pump failure comprising: a three-phase electric meter, current transformers T1, T2, T3 arranged in the fire cabinet.

[0007] The three-phase electric meter is provided with a 485 communication connection interface, which is connected to the 485 communication interface reserved by the PLC; the current transformer T1 is installed on the incoming power supply L1 phase, the current transformer T2 is installed on the incoming power supply L2 phase, and the current transformer T3 is installed on the incoming power supply L3 phase.

[0008] In a specific implementation example of the present utility model, the PLC is a PLC in a main controller of a fire control cabinet.

[0009] In a specific implementation example of the utility model, a three-phase electric meter measures the electrical parameters of the water pump, and then transmits them to the PLC in the main controller of the fire control cabinet through a 485 communication method, and the PLC in the main controller of the fire control cabinet determines the fault.

[0010] The positive progressive effect of the utility model is that the fire control cabinet capable of detecting water pump failure provided by the utility model has the following advantages:

[0011] 1. Compared with the fault detection method of contactor feedback, the utility model extends the fault detection range from the power output end of the fire cabinet to the water pump terminal, and more accurately feedbacks the fire pump problem; and realizes automatic detection of water pump faults.

[0012] 2. Compared with the speed sensor detection failure, the utility model does not need to consider the structural mechanical problems of the installation of the speed sensor, and only needs to install the equipment on the fire cabinet itself, which is easier to implement.

[0013] 3. The electric pump detection current can be used for electric pump overload protection, and the overload protection circuit of the fire cabinet itself can be eliminated.

[0014] 4. Real-time display of the electric pump working voltage, current and other parameters for easy maintenance. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] Figure 1 It is a structural schematic diagram of the utility model.

[0016] Figure 2 It is a schematic diagram of the wiring diagram of the utility model.

[0017] Figure 1 Explanation of symbols:

[0018] L1, L2, L3 represent: AC three-phase line of incoming power supply

[0019] N means: the neutral line of the incoming power supply

[0020] D1 means: Terminal block 1 of the incoming power supply

[0021] Figure 2 Explanation of symbols:

[0022] L1, L2, L3 represent: AC three-phase line of incoming power supply

[0023] N means: the neutral line of the incoming power supply

[0024] PE means: ground wire of incoming power supply

[0025] 1TA means: current transformer, serial number 1

[0026] 2TA means: Current transformer, serial number 2

[0027] 3TA means: Current transformer, serial number 3

[0028] 1U1 means: terminal block, serial number 1U1

[0029] 1V1 means: terminal block, serial number 1V1

[0030] 1W1 means: terminal block, serial number 1W1

[0031] Ia, Ib, Ic represent the three-phase current detection interface of the meter

[0032] Ua, Ub, Uc represent the three-phase voltage detection interface of the meter

[0033] 485A and 485B represent the 485 communication interface of the meter.

[0034] PLC stands for fire cabinet master controller. DETAILED DESCRIPTION

[0035] The preferred embodiments of the present invention are given below in conjunction with the accompanying drawings to illustrate the technical solution of the present invention in detail.

[0036] Figure 1 This is the electrical schematic diagram for the primary circuit, secondary circuit, PLC and inverter circuit of the utility model. Figure 1 As shown: The utility model proposes a fire control cabinet capable of detecting water pump failure, comprising: a three-phase electric meter, current transformers T1, T2, and T3 arranged in the fire cabinet, a 485 communication connection interface arranged on the three-phase electric meter, and the 485 communication connection interface connected to the 485 communication interface reserved by the PLC; the current transformer T1 is installed on the incoming power supply L1 phase, the current transformer T2 is installed on the incoming power supply L2 phase, and the current transformer T3 is installed on the incoming power supply L3 phase. ( Figure 1 Explanation of symbols: L1, L2, L3 represent: AC three-phase lines of the incoming power supply; N represents: the neutral line of the incoming power supply; D1 represents: the terminal block 1 of the incoming power supply.

[0037] The PLC is the PLC in the main controller of the fire control cabinet. The three-phase electric meter measures the electrical parameters of the water pump, and then transmits them to the PLC in the main controller of the fire control cabinet through the 485 communication method. The PLC in the main controller of the fire control cabinet determines the fault.

[0038] Figure 2 This is a schematic diagram of the wiring diagram of the utility model. The PLC in the main controller of the fire cabinet of the utility model increases the 485 communication with the electric meter to read the electric meter parameters, and the PLC program editor increases the electric pump fault judgment logic.

[0039] Figure 2Explanation of symbols: L1, L2, L3 represent: AC three-phase line of incoming power supply; N represents: neutral line of incoming power supply; PE represents: ground line of incoming power supply; 1TA represents: current transformer, serial number 1; 2TA represents: current transformer, serial number 2; 3TA represents: current transformer, serial number 3; 1U1 represents: terminal block, serial number 1U1; 1V1 represents: terminal block, serial number 1V1; 1W1 represents: terminal block, serial number 1W1; Ia, Ib, Ic represent the three-phase current detection interface of the meter; Ua, Ub, Uc represent the three-phase voltage detection interface of the meter; 485A, 485B represent the 485 communication interface of the meter; PLC represents the main controller of the fire cabinet.

[0040] The implementation of the utility model specifically includes the following steps:

[0041] Step 1: Set up a three-phase electric meter (which can read voltage, current, power and other parameters, including 485 communication function) and a current transformer in the fire cabinet; read voltage, current, power and other parameters.

[0042] Step 2: Use 485 communication to connect the meter (including 485 communication function) and PLC (PLC has reserved 485 communication interface) and read the meter parameters into PLC.

[0043] Step 3: Set the voltage, current and power operating range on the PLC. If the current, voltage and power values ​​read on the meter exceed the set threshold values, the pump fault is reported (the methods are: 1. Compare whether the detected load voltage and current are balanced. 2. Set a working current range and compare whether the current is within this range during operation.)

[0044] Compared with the fault detection method of contactor feedback, the utility model extends the range of fault detection from the power output end of the fire cabinet to the water pump terminal, more accurately feeds back the fire water pump problem, and realizes automatic detection of water pump faults.

[0045] The above shows and describes the basic principle and main features of the utility model and the advantages of the utility model. Those skilled in the art should understand that the utility model is not limited by the above embodiments, and the above embodiments and descriptions are only for explaining the principle of the utility model. Without departing from the spirit and scope of the utility model, the utility model may have various changes and improvements, which fall within the scope of the utility model to be protected, and the scope of protection of the utility model is defined by the attached claims and their equivalents.

Claims

1. A fire control cabinet capable of detecting water pump failure, characterized in that: The fire control cabinet capable of detecting water pump failure comprises: a three-phase electric meter, current transformers T1, T2, T3 arranged in the fire cabinet, The three-phase electric meter is provided with a 485 communication connection interface, which is connected to the 485 communication interface reserved by the PLC; the current transformer T1 is installed on the incoming power supply L1 phase, the current transformer T2 is installed on the incoming power supply L2 phase, and the current transformer T3 is installed on the incoming power supply L3 phase.

2. The fire control cabinet capable of detecting water pump failure according to claim 1 is characterized in that: PLC is the PLC inside the main controller of the fire control cabinet.

3. The fire control cabinet capable of detecting water pump failure according to claim 2 is characterized in that: The three-phase electric meter measures the electrical parameters of the water pump, and then transmits them to the PLC in the main controller of the fire control cabinet through the 485 communication method. The PLC in the main controller of the fire control cabinet determines the fault.

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