CN2428161Y

CN2428161Y - Microcomputer-controlled electric cabinet for fire-fighting water supply

Info

Publication number: CN2428161Y
Application number: CN 00239271
Authority: CN
Inventors: 魏玉伶; 黄达章; 汪洪敏; 关文彬; 张志全
Original assignee: ANFUYE FIRE-FIGHTING ENGINEERING APPARATUS Co Ltd BEIJING
Current assignee: ANFUYE FIRE-FIGHTING ENGINEERING APPARATUS Co Ltd BEIJING
Priority date: 2000-06-19
Filing date: 2000-06-19
Publication date: 2001-05-02
Anticipated expiration: 2010-06-19

Abstract

The utility model relates to a microcomputer-controlled electric cabinet for fire-fighting water supply. The utility model is composed of a two-way power switch, a pump controlling circuit, and a fire-fighting pump. The utility model is characterized in that the input end of the pump controlling circuit is connected with a digital PID microcomputer controller composed of a distance-transmission pressure gauge, a regulator, a comparator, a filter, an arithmetic unit, a relay, etc. The utility model has the advantages that water pipe network pressure can be monitored ever and again; as a fire accident occurs, the fire pump can be started as water in a fire hydrant is discharged or without any pump starting signal; furthermore, the water pipe network pressure can be measured, and can be compared with the preset pressure; then, pressure-stabilizing pump starting instructions can be sent out in that the normal high pressure of the water pipe network can be maintained; the utility model also has the function of automatic polling.

Description

Microcomputer control fire fighting supply electrical control cubicles

The utility model relates to a kind of fire fighting supply switch board, particularly microcomputer control fire fighting supply electrical control cubicles.

Fire fighting supply, is widely used in the skyscraper as the part in the building trade fire-fighting system with switch board.Common fire fighting supply switch board mainly is made up of double loop power supply switching, pump control circuit and fire pump.The switch board of this structure need start fire pump, but catch fire in emergency circumstances by pressing control knob manually, and people have often forgotten operation sequence, picks up just water spray of fire hydrant, and therefore not starting of pump at this moment can't supply water, and has influenced fire-fighting work; In addition, fire pump does not use for a long time, and getting rusty easily has also influenced the reliability of system.

The purpose of this utility model is to provide a kind of fire pump of can controlling automatically to supply water, and keeps the pipe network normal pressure, and the high microcomputer control fire fighting supply electrical control cubicles of reliability.

The purpose of this utility model is achieved in that a kind of microcomputer control fire fighting supply is made up of double loop power supply switching, pump control circuit and fire pump with electrical control cubicles, and its characteristics are: the input at pump control circuit is connected to the digital pid microcomputerized controller.When the people of catching fire pick up that fire hydrant flame or sprinkler head are heated and when spraying water, because releasing of water descends grid pressure significantly, this signal is passed to the PID microcomputerized controller, it sends command signal immediately, starts fire pump, gives the pipe network moisturizing, satisfies extinguishment requirement.

The PID microcomputerized controller is made up of teletransmission Pressure gauge, adjuster, comparator, wave filter, arithmetic unit and relay, the force value H0 that sets in advance in teletransmission Pressure gauge pressure output value H and the adjuster compares, the error amount that is produced is converted to the signal of telecommunication and carries out fuzzy operation in the arithmetic unit after wave filter send, and operation result is converted to control signal and sends pump control circuit to through relay switch.

Below in conjunction with drawings and Examples the utility model is further described.

Fig. 1 is a theory diagram of the present utility model;

Fig. 2 is an electrical schematic diagram of the present utility model;

Fig. 3 is a PID microcomputerized controller theory diagram of the present utility model;

Fig. 4 and Fig. 5 are PID microcomputerized controller electrical schematic diagram of the present utility model.

Referring to accompanying drawing 1, the utility model comprises double loop power supply commutation circuit 1, PID microcomputerized controller 2, main pump control circuit 3, is equipped with pump control circuit 3 ', main fire pump M1 and is equipped with fire pump M2.The control signal that PID microcomputerized controller 2 provides is input to pump control circuit 3, makes its start signal output master fire pump M1 or is equipped with fire pump M2.

Referring to accompanying drawing 2, mainly contain double loop power supply commutation circuit 1, main pump control circuit 3 and be equipped with pump control circuit 3 ', PID microcomputerized controller and warning circuit are formed.Wherein the double loop power supply commutation circuit is made up of four control relay KA21-KA24, two A.C. contactor KM51, KM52 and two air-break Q11, Q12, under the situation that the two-way air-break is all connected, as long as one road power supply uses, another road power supply definitely disconnects, and the road power supply that is using is when outage or open-phase fault occurring, control relay can make another road demand working, comes into operation, and continues power supply.

Main pump control circuit 3 is by meeting button S5, S6, control relay KA2, time-delay relay KT1, A.C. contactor KM1-KM3 forms, S5, S6 realize manually opening, termination of pumping, time-delay relay KT1 is a Y-delta connection transfer delay, the effect of KM4 normally-closed contact is to start to disconnect main pump immediately after standby, guarantee pump work all the time, avoid the electrical network overload.It is identical with main pump control circuit 3 to be equipped with pump control circuit 3 '.

S1, S2, KZ, KA2 branch road are the alert circuit of fire-fighting, and S1, S2 manually report to the police, and KZ is the tele-alarm signal, come KA2 work then as the fire-fighting fire extinguishing signal, and control starts fire pump.

PID sends instruction by relay K 1, K2, controls main pump, the startup of pump fully respectively, and when ductwork pressure descended significantly, K1 was at first closed, starts main pump, if pressure is not enough, also wants closed K2 to start pump fully.When polling period at ordinary times arrives, except successively closed K1, K2, closed K4 simultaneously, so that K4 connects, it is bright to patrol and examine indicator lamp, state is patrolled and examined in report.S0 is manual state switch, pushbutton on the manual state electrical control cubicles, and by remote controls such as outer fire hydrant of cabinet or fire watch chambers, the PID control action is also carried out under auto state under the auto state.

Referring to accompanying drawing 3, PID microcomputerized controller 2 is by teletransmission Pressure gauge 21, adjuster 22, comparator 23, wave filter 24, arithmetic unit 25 and relay 26 are formed, the force value H0 that sets in advance in teletransmission Pressure gauge 21 pressure output value H and the adjuster 22 compares in comparator 23, the error amount that is produced is converted to the signal of telecommunication and carries out fuzzy operation in the arithmetic unit 25 after wave filter 24 send, operation result is converted to control signal and sends pump control circuit 3 or 3 ' to through relay switch 26, to reach operating pressure value H is same as setting all the time at any flow status reference pressure value H0.H0 is not unalterable under some special running statuses, as in flow transformation, interior increment transformation, fire-fighting transformation, anhydrous duty etc.H0 can occur changing in these incidents, and is required to adapt to actual pipe network operation state.

Referring to attached Figure 4 and 5, the input termination teletransmission Pressure gauge of U1, U2, the signal of its output, the value of setting with prior B3, B4, B5 compares by U3, U4, enter arithmetic unit 2864 and 2764 after the output and carry out computing, the control signal of output arrives relay K 1, K2 and K4 through the ADC0809 converter.

The utility model compared with prior art has following advantage:

1. owing to adopt the PID microcomputerized controller, the utility model can monitor the grid pressure constantly Power, when fire took place, fire hydrant one discharged water or also can start and disappear without any opening the pump signal Anti-pump;

2. can measure grid pressure, and with the pressure ratio of setting, send the startup stabilized pressure pump Instruction, for the normal high pressure of keeping the fire water pipeline, the water halter of just suitable family, because Pressure is arranged in the pipeline, when opened water and used;

3. has automatic inspection function. The PID microcomputerized controller can be regularly (every tens days, Time is adjustable) send and once open the pump instruction, allow every pump impeller stream short time move, with Prevent the pig iron.

Claims

1. microcomputer control fire fighting supply electrical control cubicles is made up of double loop power supply switching, pump control circuit and fire pump, and it is characterized in that: the input at pump control circuit is connected to the PID microcomputerized controller.

2. electrical control cubicles according to claim 1, it is characterized in that: the PID microcomputerized controller is made up of teletransmission Pressure gauge, adjuster, comparator, wave filter, arithmetic unit and relay, the force value that sets in advance in teletransmission Pressure gauge pressure output value and the adjuster compares, the error amount that is produced is converted to the signal of telecommunication and carries out fuzzy operation in the arithmetic unit after wave filter send, and operation result is converted to control signal and sends pump control circuit to through relay switch.