CN201111160Y - Fire-fighting pump low frequency automatic patrol checking control circuit - Google Patents

Abstract

The utility model is a fire pump low frequency automatic testing control circuit, which relates to a fire pump automatic testing control device needing to solve the problems of complexity, increased failure rate and unreliable control of the fire-fighting water supply equipment automatic testing control circuit. The control circuit has the technical proposal that: the circuit comprises a major loop, a control loop and a logic control unit by means of wiring connection and is characterized in that the major loop is provided with a transducer, a breaker of the major loop is connected with a 380V power supply externally to the transducer, the transducer is connected to a motor by a contactor normal open contact, and the contactor normal open contact is connected to the transducer. The control circuit is used for the fire pump low frequency automatic testing control device.

Description

The fire extinguishing pump low frequency is patrolled and examined control circuit automatically

Technical field:

The utility model relates to fire extinguishing pump and patrols and examines control device automatically.

Background technology:

Existing fire water supply equipment is patrolled and examined control device automatically and is made up of major loop, control loop, logic control element trisome Wiring type.Major loop comprises isolating switch, contactor, overheating protection; Control loop comprises that isolating switch, fire hydrant button and pilot lamp, fire alarm, fire lamp, fire extinguishing pump are shut down indication, fire extinguishing pump indicating fault, patrolled and examined indication, fire-fighting source water level in water pool judges that float switch and water level are crossed low judgement and valve indication, fire extinguishing pump hand/automatic change over, hand switch, electric butterfly valve hand/automatic change over, open and close threshold switch are indicated, opened to indication, the operation indication of fire extinguishing pump, electronic dish valve pass valve; Logic control element comprises logic controller, power supply protection fuse, ductwork pressure is judged electro connecting pressure gauge, in the fire water-supply control system, fire extinguishing pump realizes that automatic inspection function mainly finished by logic control element, logic controller is received after fire-fighting is in the auto state signal, sending signal makes the control time relay get electric timing, timing time is relevant with the corrosion time that prevents fire extinguishing pump, generally be set at 10 days～15 days, timing time signals to logic controller behind setting-up time, if this moment, logic controller was not received fire-water pond water level low signal, then logic controller sends the turn on pump signal, the system that sends simultaneously patrols and examines status signal, controlled by the logic controller internal clocking working time of patrolling and examining of fire extinguishing pump, fire extinguishing pump is during patrolling and examining, logic controller can be by receiving the pipe network height that ductwork pressure judges that electro connecting pressure gauge sends, low-voltage signal, judge the Push And Release that sends the pressure release electric butterfly valve, thereby the hydraulic pressure that makes fire main remains on the height that ductwork pressure judges that electro connecting pressure gauge is set, between the low-pressure, this state lasts till that always monitoring time finishes; If source water level in water pool low signal, fire alarm, fire extinguishing pump fault-signal occur, system can stop fire extinguishing pump and patrol and examine process during fire extinguishing pump is patrolled and examined, and closes blowdown valve simultaneously and patrols and examines indicator signal.Normal monitoring time arrives, logic controller can send and stop the fire extinguishing pump signal, stops patrolling and examining condition indicative signal and closes the blowdown valve signal, sends signal simultaneously and gets electric timing by the time relay, repeat above action, thereby realize the automatic inspection function of fire water-supply control system.

The main effect that existing fire water supply equipment is patrolled and examined control device automatically is a starting and stopping fire extinguishing pump regularly when not having fire alarm at ordinary times, prevents the fire extinguishing pump corrosion, reaches the automatic inspection function of fire water supply equipment.Adopt isolating switch, the direct start-stop fire extinguishing pump of contactor when patrolling and examining, because be the total head operation, the unexpected high-speed starting of pump certainly will cause the ductwork pressure fluctuation, particularly high-power pump, and it is more obvious fluctuate, very big to the pipe network impact, thereby influences pipe network normal serviceable life.And in the process of patrolling and examining, because of ductwork pressure increases, must on pipeline, increase pressure release electric butterfly valve and ductwork pressure and judge electro connecting pressure gauge, just can make the hydraulic pressure of fire main keep stable, cause the control circuit complexity, failure rate increases, and it is unreliable to control.

The utility model content

The purpose of this utility model is to provide a kind of safe and convenient to use on the original basis; the novel fire water supply equipment that protective value is perfect is patrolled and examined control circuit automatically; pass through to set the frequency of frequency converter when patrolling and examining; running speed when the control fire extinguishing pump is patrolled and examined; realize the automatic inspection function of fire extinguishing pump low frequency; the starting and stopping of control fire extinguishing pump obtain full-automation, prevent that the fire extinguishing pump corrosion from can not produce impact to pipe network again, improve the serviceable life of water pump, the normal use of assurance pipe network.

The technical solution of the utility model comprises major loop, control loop, logic control element trisome Wiring type composition, major loop comprises isolating switch, contactor, overheating protection, frequency converter, the external 380V power supply of isolating switch is to frequency converter, frequency converter is connected to motor through the contactor normal opened contact, and the contactor normal opened contact is connected to frequency converter; Control loop by isolating switch, fire hydrant button and pilot lamp, fire alarm, fire lamp, power supply indication, fire extinguishing pump indicating fault, patrol and examine indication, fire-fighting source water level in water pool and judge that float switch and water level are crossed operation indication, the fire extinguishing pump hand/automatic change over of low judgement and indication, fire extinguishing pump, manually the start-stop button is formed; Logic control element is made up of logic controller, power supply protection fuse; In the fire water-supply control system, the travelling speed of pump when patrolling and examining by the control of frequency converter guidance panel setpoint frequency; Realize patrolling and examining automatically by logic control element control fire extinguishing pump; Logic controller is received after fire-fighting is in the auto state signal, sending signal makes the control time relay get electric timing, the timing time of the time relay is relevant with the corrosion time that prevents fire extinguishing pump, be set at 10 days～15 days, timing time signals to logic controller behind time relay setting-up time, if this moment, logic controller was not received fire-water pond water level low signal, then logic controller sends system and patrols and examines status signal, send the turn on pump signal simultaneously, make contactor get electric adhesive, frequency converter is accepted to bring into operation by setpoint frequency after the enabling signal, realizes that the low frequency of fire water-supply control system is patrolled and examined automatically.

The utility model is owing to patrolling and examining frequency converter of increase in the switch board automatically, need not to install pressure release electric butterfly valve and ductwork pressure again and judge electro connecting pressure gauge, the control of having saved the pressure release electric butterfly valve in the circuit on the pipeline; Keep the fire extinguishing pump automatic low-frequency to patrol and examine at ordinary times, preventing that the fire extinguishing pump rust is dead, keeping the fire_fighting pipe network pressure stability; And simple installation, simple to operate, the starting and stopping of control fire extinguishing pump are errorless; According to the needs of fielded system, can conveniently realize the enforcement of many fire extinguishing pump systems; Owing to be that low frequency is patrolled and examined, the optional within the specific limits power less than load of the power of frequency converter has economical and practical advantage.

Description of drawings

Fig. 1 is fire water supply equipment control system major loop figure.

Fig. 2 is fire water supply equipment control system control loop figure.

Fig. 3 is fire water supply equipment control system logic control element figure.

Embodiment

The utility model comprises fire water supply equipment control system major loop (Fig. 1), control loop (Fig. 2), logic control element (Fig. 3) trisome Wiring type composition.Major loop (Fig. 1) is made up of circuit breaker Q F1, QF2, contactor KM1, KM2, overheating protection KH1, frequency converter VVVF; U1 on the frequency converter VVVF, V1, W1 connect the 380V power supply through circuit breaker Q F1, U2 on the frequency converter VVVF, V2, W2 are connected to U3, V3, W3 on the motor through contactor KM2 normal opened contact correspondence, and contactor KM2 normal opened contact is connected to 10,18 contacts of frequency converter VVVF; The external 380V power supply of circuit breaker Q F2, circuit breaker Q F2 is connected to U3, V3, W3 on the motor through contactor KM1 normal opened contact and electrothermal relay KH1; Control loop (Fig. 2) by circuit breaker Q F3, transformer T, fire hydrant button SN1～SNn and pilot lamp HN1～HNn, fire alarm BF, fire lamp HL1, power supply indication HL2, fire extinguishing pump indicating fault HL5, patrol and examine indication HL6, fire-fighting source water level in water pool and judge that float switch SL and water level are crossed and lowly judge and indication KA3, HL4, the operation indication HL3 of fire extinguishing pump, fire extinguishing pump hand/automatic change over SA1, manual change-over switch SA2 form; Control loop is all through the external 220VAC power supply of circuit breaker Q F3, when circuit breaker Q F3 is closed, power light HL2 is bright, fire hydrant button SN1～SNn connect with auxiliary reclay KA1 back and normal battle of auxiliary reclay KA1 and circuit after pilot lamp HN1～HNn connects and be attached to the output terminal of transformer T, be connected to auxiliary reclay KA2 the normal battle of KA1 respectively, fire alarm BF, fire lamp HL1, contactor KM1, be connected to run indicator HL3 the normal battle of KM2, the normal battle of electrothermal relay KH1 is connected to malfunction indicator lamp HL5, auxiliary reclay KA8 is often made war to be connected to and is patrolled and examined pilot lamp HL6 and contactor KM2, float switch SL often is connected to the source water level battle and crosses low pilot lamp HL4 and auxiliary reclay KA3, the normally closed point of auxiliary reclay KA8 connects 1 position of conversion switch S A1, and behind switch SA2, often make war with auxiliary reclay KA6 and in parallel be connected with the normally closed point of electrothermal relay KH1, be connected to contactor KM1 again; Logic control element (Fig. 3) is made up of logic controller PLC, power supply protection fuse FU; External 220VAC power supply is connected to L, the N of PLC through fuse FU, P00～P04 terminal that the time closing point of 2 positions of switch SA1, time relay KT, auxiliary reclay KA2 are often made war, auxiliary reclay KA3 is often made war, switch SA3 meets PLC respectively by said sequence connects the P05 terminal of PLC after normal parallel connection battle of contactor KM1, KM2; The P40 of PLC～P42 terminal meets auxiliary reclay KA6, time relay KT, auxiliary reclay KA8 respectively.In the fire water-supply control system, set running frequency by frequency converter VVVF inner parameter; Realize patrolling and examining automatically by logic control element control fire extinguishing pump, logic controller PLC receives after fire-fighting is in auto state signal P00, sending signal P41 makes control time relay K T1 get electric timing, the timing time of KT1 is relevant with the corrosion time that prevents fire extinguishing pump, generally be set at 10 days～15 days, timing time signalling P01 behind the KT1 setting-up time give PLC, if this moment, PLC did not receive fire-water pond water level low signal P03, then PLC sends system and patrols and examines status signal P42, make auxiliary reclay KA8 get electric adhesive, the KA8 closure of often making war makes contactor KM2 get electric adhesive, the KM2 closure of often making war, frequency converter VVVF accepts to bring into operation by setpoint frequency behind the enabling signal KM2, thereby realizes the automatic inspection function of low frequency of fire water-supply control system.

Claims (1)

1, the fire extinguishing pump low frequency is patrolled and examined control circuit automatically, comprise major loop, control loop, logic control element trisome Wiring type composition, it is characterized in that major loop is provided with a frequency converter, the external 380V power supply of major loop isolating switch is to frequency converter, frequency converter is connected to motor through the contactor normal opened contact, and the contactor normal opened contact is connected to frequency converter.

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