CN111450461B

CN111450461B - Fire pump control device and control cabinet

Info

Publication number: CN111450461B
Application number: CN202010314927.8A
Authority: CN
Inventors: 李志�
Original assignee: Guangzhou Hanhua Building Design Co ltd
Current assignee: Guangzhou Hanhua Building Design Co ltd
Priority date: 2020-04-21
Filing date: 2020-04-21
Publication date: 2021-10-22
Anticipated expiration: 2040-04-21
Also published as: CN111450461A

Abstract

The application relates to a fire pump control device and a control cabinet. Wherein, fire pump controlling means includes: each water pump main loop; the water pump main loop comprises a main circuit breaker, a main contactor and a main thermal relay; one end of the main breaker is used for connecting a control power supply, and the other end of the main breaker is connected with one end of the main contactor; the other end of the main contactor is connected with a corresponding fire pump through a main thermal relay; the water pump control loops are respectively connected with the water pump main loops in a one-to-one correspondence manner; the water pump control loop comprises an isolation transformer, a start-stop operation control circuit and an alarm indicating circuit; the primary side input end of the isolation transformer is connected between the main circuit breaker and the main contactor, and the secondary side output end of the isolation transformer is respectively connected with the start-stop operation control circuit and the alarm indicating circuit; the reliability can be improved.

Description

Fire pump control device and control cabinet

Technical Field

The application relates to the technical field of electrical control, in particular to a fire pump control device and a control cabinet.

Background

At present, the wiring of a main loop of a fire pump control cabinet widely used in China is shown in fig. 1 (taking one-use one-standby and two-use one-standby as an example), the fire pump needs to be powered by 2 paths of power supplies in most cases, such as the main power supply and the standby power supply shown in fig. 1, the 2 paths of power supplies are respectively led to the fire pump control cabinet by 5 lines, such as 3 phase lines (L1, L2, L3), a working zero line (N) and a protection line (PE) in fig. 1, and the power is supplied to the fire pump after being switched by an Automatic Transfer Switching Equipment (ATSE).

The control loop of the existing fire pump control cabinet is implemented according to the current national standard, for example, as shown in fig. 2-7, the current national building design standard drawing sets the spray pump of the main loop corresponding to the wet fire extinguishing system in the common water pump control circuit drawing (16D 303-3); in addition, the main loop is provided with a fire-fighting equipment power supply monitoring system, and when the main loop loses power, a fire control room sends out an alarm signal, for example, as shown in FIG. 8, the design drawing of national building standard, the design Specification for automatic fire alarm systems (14X 505-1).

In the implementation process, the inventor finds that at least the following problems exist in the conventional technology: the traditional fire pump control cabinet is easy to have short circuit fault and control failure, and has the problem of poor reliability.

Disclosure of Invention

In view of the above, it is desirable to provide a fire pump control device and a control cabinet that can improve reliability in response to the above-described problems.

In order to achieve the above object, in one aspect, an embodiment of the present invention provides a fire pump control apparatus, including:

each water pump main loop; the water pump main loop comprises a main circuit breaker, a main contactor and a main thermal relay; one end of the main breaker is used for connecting a control power supply, and the other end of the main breaker is connected with one end of the main contactor; the other end of the main contactor is connected with a corresponding fire pump through a main thermal relay;

the water pump control loops are respectively connected with the water pump main loops in a one-to-one correspondence manner; the water pump control loop comprises an isolation transformer, a start-stop operation control circuit and an alarm indicating circuit; the primary side input end of the isolation transformer is connected between the main circuit breaker and the main contactor, and the secondary side output end of the isolation transformer is respectively connected with the start-stop operation control circuit and the alarm indicating circuit;

the starting, stopping and running control circuit is used for controlling the starting, stopping and running of the fire pump; the alarm indicating circuit is used for feeding back an alarm signal to the fire control room when the main loop of the water pump and the control loop of the water pump are in fault.

In one embodiment, the control power supply is a main power supply or a standby power supply; the fire pump control device also comprises an automatic change-over switch; the automatic change-over switch is 3-pole ATSE;

one end of the automatic change-over switch is used for connecting a main power supply or a standby power supply, and the other end of the automatic change-over switch is connected with one end of the main circuit breaker.

In one embodiment, the isolation transformer is a 380V/220V secondary side ungrounded isolation transformer;

the water pump control loop further comprises a first fuse, a first power switch, a second fuse and a second power switch;

one end of the first fuse is connected with one end of the primary side coil of the isolation transformer, and the other end of the first fuse is connected with one end of the first power switch; the other end of the first power switch is connected between the main circuit breaker and the main contactor;

one end of the second fuse is connected with the other end of the primary side coil of the isolation transformer, and the other end of the second fuse is connected with one end of the second power switch; the other end of the second power switch is connected between the main breaker and the main contactor.

In one embodiment, the water pump control loop further comprises an insulation monitor connected with the output end of the secondary side of the isolation transformer;

the insulation monitor is used for monitoring the insulation state of the water pump control loop and outputting an alarm signal when one point is monitored to be grounded.

In one embodiment, the alarm indication circuit comprises an intermediate relay and a power signal lamp; one end of the intermediate relay is connected with one end of the secondary side coil of the isolation transformer, and the other end of the intermediate relay is connected with the other end of the secondary side coil of the isolation transformer; one end of the power signal lamp is connected with one end of the secondary side coil of the isolation transformer through a normally open contact of the intermediate relay, and the other end of the power signal lamp is connected with the other end of the secondary side coil of the isolation transformer; when the normally closed contact of the intermediate relay is connected, an alarm signal is output to the fire control room.

In one embodiment, each main water pump loop is a main pump loop and a standby pump loop respectively; each water pump control loop is respectively a main pump control loop and a standby pump control loop;

the start-stop operation control circuit of the main pump control loop comprises a first main pump contactor, a first automatic control circuit, a first remote manual control circuit, a first remote automatic control circuit and a first local manual control circuit, wherein the first automatic control circuit, the first remote manual control circuit, the first local manual control circuit and the first local manual control circuit are all connected with the first main pump contactor; one end of the first main pump contactor is connected with one end of the secondary side coil of the isolation transformer through corresponding relay contacts in the first automatic control circuit, the first remote manual control circuit, the first remote automatic control circuit and the first in-situ manual control circuit, and the other end of the first main pump contactor is connected with the other end of the secondary side coil of the isolation transformer;

the start-stop operation control circuit of the standby pump control circuit comprises a first standby pump contactor and a first time relay; one end of the first time relay is connected with one end of a secondary side coil of the isolation transformer through a normally closed contact of the first main pump contactor, and the other end of the first time relay is connected with the other end of the secondary side coil of the isolation transformer; one end of the first standby pump contactor is connected with one end of the secondary side coil of the isolation transformer through a delay contact of the first time relay, and the other end of the first standby pump contactor is connected with the other end of the secondary side coil of the isolation transformer.

In one embodiment, the first automatic control circuit comprises a first flow switch arranged on a water outlet pipe of the high-level water tank, a first pressure switch arranged on the main trunk pipe and a second time relay with a delay contact connected with the first main pump contactor; one end of the first flow switch and one end of the first pressure switch are both connected with one end of the secondary side coil of the isolation transformer, and the other end of the first flow switch and the other end of the first pressure switch are both connected with one end of the second time relay; the other end of the second time relay is connected with the other end of the secondary side coil of the isolation transformer;

the first remote manual control circuit comprises a first intermediate relay, a second intermediate relay, a third intermediate relay and a second pressure switch arranged on the alarm valve; one end of a normally open contact of the first intermediate relay is connected with one end of a secondary side coil of the isolation transformer, and the other end of the normally open contact is connected with the other end of the secondary side coil of the isolation transformer through the first main pump contactor; one end of a normally open contact of the second intermediate relay is connected with one end of a secondary side coil of the isolation transformer through a delay contact of the second time relay, and the other end of the normally open contact is connected with one end of a third intermediate relay; the other end of the third intermediate relay is connected with the other end of the secondary side coil of the isolation transformer; one end of the first main pump contactor is connected with one end of the secondary side coil of the isolation transformer through a normally closed contact of a third intermediate relay; one end of the second pressure switch is connected with one end of the secondary side coil of the isolation transformer, and the other end of the second pressure switch is connected with one end of the third intermediate relay through a normally open contact of the third intermediate relay;

the first remote automatic control circuit comprises a linkage control output module and a fourth intermediate relay connected with the linkage control output module; one end of a normally open contact of the fourth intermediate relay is connected with one end of a secondary side coil of the isolation transformer, and the other end of the normally open contact is connected with one end of the first main pump contactor through the normally closed contact of the third intermediate relay.

In one embodiment, each main water pump loop is a main pump loop, a pressure pump loop and a standby pump loop; each water pump control loop is respectively a main pump control loop, a pressure pump control loop and a standby pump control loop;

the start-stop operation control circuit of the pressure pump control circuit comprises a first pressure pump contactor, a first time relay and a first pressure controller arranged on a water outlet pipe; one end of the first pressure controller is connected with one end of a secondary side coil of the isolation transformer, and the other end of the first pressure controller is connected with one end of a first time relay through a normally open contact of the first main pump contactor; the other end of the first time relay is connected with the other end of the secondary side coil of the isolation transformer; one end of the first pressure pump contactor is connected with one end of the secondary side coil of the isolation transformer through a delay contact of the first time relay, and the other end of the first pressure pump contactor is connected with the other end of the secondary side coil of the isolation transformer;

the start-stop operation control circuit of the standby pump control circuit comprises a first standby pump contactor, a second time relay and a third time relay; one end of the second time relay is connected with one end of the secondary side coil of the isolation transformer through a normally closed contact of the first pressure pump contactor, and the other end of the second time relay is connected with the other end of the secondary side coil of the isolation transformer through a normally closed contact of the first standby pump contactor; one end of the third time relay is connected with one end of the secondary side coil of the isolation transformer through a normally closed contact of the first pressure pump contactor, and the other end of the third time relay is connected with the other end of the secondary side coil of the isolation transformer through a normally closed contact of the first standby pump contactor; one end of the first standby pump contactor is connected with one end of the secondary side coil of the isolation transformer through the delay contact of the second time relay and the delay contact of the third time relay respectively, and the other end of the first standby pump contactor is connected with the other end of the secondary side coil of the isolation transformer.

In one embodiment, the first automatic control circuit comprises a first flow switch arranged on a water outlet pipe of the high-level water tank and a fourth time relay of which a delay contact is connected with the first main pump contactor; one end of the first flow switch is connected with one end of the secondary side coil of the isolation transformer, and the other end of the first flow switch is connected with one end of the fourth time relay; the other end of the fourth time relay is connected with the other end of the secondary side coil of the isolation transformer;

the first remote manual control circuit comprises a first intermediate relay, a second intermediate relay, a third intermediate relay and a first pressure switch arranged on the alarm valve; one end of a normally open contact of the first intermediate relay is connected with one end of a secondary side coil of the isolation transformer, and the other end of the normally open contact is connected with the other end of the secondary side coil of the isolation transformer through the first main pump contactor; one end of a normally open contact of the second intermediate relay is connected with one end of a secondary side coil of the isolation transformer through a delay contact of the second time relay, and the other end of the normally open contact is connected with one end of a third intermediate relay; the other end of the third intermediate relay is connected with the other end of the secondary side coil of the isolation transformer; one end of the first main pump contactor is connected with one end of the secondary side coil of the isolation transformer through a normally closed contact of a third intermediate relay; one end of the first pressure switch is connected with one end of the secondary side coil of the isolation transformer, and the other end of the first pressure switch is connected with one end of the third intermediate relay through a normally open contact of the third intermediate relay;

A fire pump control cabinet comprises the fire pump control device.

One of the above technical solutions has the following advantages and beneficial effects:

in the fire pump control device, a water pump control loop connected with a corresponding water pump main loop comprises an isolation transformer, wherein a primary side input end of the isolation transformer is connected between a main circuit breaker and a main contactor, and a secondary side output end of the isolation transformer is respectively connected with a start-stop operation control circuit and an alarm indicating circuit; each water pump control loop can adopt an isolation transformer with a secondary side not grounded to supply power; the primary side power supply of the isolation transformer is taken from the load side of the main breaker of the water pump, the main loop is isolated from the control circuit, and when any part is short-circuited to the ground in one point, each control loop can still work normally; because of being isolated from the main loop, the relay contact can not be bonded due to the large short-circuit capacity of the power supply, and further control failure is caused. Furthermore, based on the alarm indication circuit, the fire control room has an alarm signal no matter the main loop and the control loop lose power due to short circuit or any other reason. This application is according to the use and the operation characteristics of fire pump, has simplified control circuit, not only can improve the reliability also reduce the cost.

Drawings

In order to more clearly illustrate the technical solutions in the embodiments or the conventional technologies of the present application, the drawings used in the descriptions of the embodiments or the conventional technologies will be briefly introduced below, it is obvious that the drawings in the following descriptions are only some embodiments of the present application, and for those skilled in the art, other drawings can be obtained according to the drawings without creative efforts.

FIG. 1 is a wiring diagram of a main circuit of a conventional fire pump control cabinet;

FIG. 2 is a first control circuit diagram of a conventional fire pump control cabinet in a standby mode;

FIG. 3 is a second control circuit diagram of a conventional fire pump control cabinet for one use and one standby;

FIG. 4 is a first control circuit diagram of a conventional fire pump control cabinet with two functions and one standby mode;

FIG. 5 is a second control circuit diagram of a conventional fire pump control cabinet with two functions, one standby mode and the other standby mode;

FIG. 6 is a third control circuit diagram of a conventional fire pump control cabinet with two functions, one standby mode and one standby mode;

FIG. 7 is a fourth control circuit diagram of a conventional fire pump control cabinet with two functions and one standby mode;

FIG. 8 is a circuit diagram of a conventional fire fighting equipment power monitoring system;

FIG. 9 is a schematic diagram of the structure of a fire pump control device in one embodiment;

FIG. 10 is a schematic structural diagram of a fire pump control device in another embodiment;

FIG. 11 is a schematic diagram of a primary circuit and a secondary circuit of the fire pump control apparatus in one embodiment;

FIG. 12 is a schematic diagram of a primary pump control loop of the fire pump control apparatus in one embodiment for one use and one standby;

FIG. 13 is a schematic diagram of a control loop of the fire pump control apparatus for one-time use and one-time standby pump in one embodiment;

FIG. 14 is a schematic diagram of a dual-purpose primary circuit of the fire pump control device in one embodiment;

FIG. 15 is a schematic diagram of a control circuit of a master pump for both use and standby of a fire pump control device in one embodiment;

FIG. 16 is a schematic diagram of a control circuit of the fire pump control device in one embodiment for both the first and second modes of operation of the pressure controlled pump;

FIG. 17 is a schematic diagram of a control circuit of the fire pump control device for both use and standby in one embodiment.

Detailed Description

To facilitate an understanding of the present application, the present application will now be described more fully with reference to the accompanying drawings. Embodiments of the present application are set forth in the accompanying drawings. This application may, however, be embodied in many different forms and should not be construed as limited to the embodiments set forth herein. Rather, these embodiments are provided so that this disclosure will be thorough and complete.

Unless defined otherwise, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this application belongs. The terminology used herein in the description of the present application is for the purpose of describing particular embodiments only and is not intended to be limiting of the application.

It will be understood that, as used herein, the terms "first," "second," and the like may be used herein to describe various elements, but these elements are not limited by these terms. These terms are only used to distinguish one element from another. For example, a first resistance may be referred to as a second resistance, and similarly, a second resistance may be referred to as a first resistance, without departing from the scope of the present application. The first resistance and the second resistance are both resistances, but they are not the same resistance.

It is to be understood that "connection" in the following embodiments is to be understood as "electrical connection", "communication connection", and the like if the connected circuits, modules, units, and the like have communication of electrical signals or data with each other.

As used herein, the singular forms "a", "an" and "the" may include the plural forms as well, unless the context clearly indicates otherwise. It will be further understood that the terms "comprises/comprising," "includes" or "including," etc., specify the presence of stated features, integers, steps, operations, components, parts, or combinations thereof, but do not preclude the presence or addition of one or more other features, integers, steps, operations, components, parts, or combinations thereof. Also, as used in this specification, the term "and/or" includes any and all combinations of the associated listed items.

The traditional fire pump control cabinet has poor reliability and can be mainly shown in the following aspects:

on one hand, taking a spray water pump of a main loop corresponding to a wet fire extinguishing system in a common water pump control circuit diagram (16D303-3) as an example, as shown in figure 2, a short-circuit fault fuse is fused at a point A, a control circuit loses power, and 2 water pumps shown in figures 2 and 3 cannot be automatically controlled and remotely automatically and manually controlled in a fire control room; as shown in fig. 3, when a short-circuit fault occurs at point B or point C, the pump No. 1 (i.e., pump No. 1) or the pump No. 2 (i.e., pump No. 2) cannot operate.

When the control circuit is powered off due to short circuit or other reasons, the traditional fire control room cannot display signals; as shown in fig. 6, a "fire-fighting equipment power monitoring system" specifically configured to monitor power integrity can only monitor the main circuit and cannot monitor the control circuit. Further, in a system with a large short-circuit capacity, relay contacts are prone to sticking, which may cause control failure. Similar drawbacks are more pronounced in the dual-purpose one-standby control circuits shown in fig. 4-7.

On the other hand, the traditional fire pump control cabinet also has the problems of complex system and inconvenient management; as shown in fig. 3, a change-over switch (D) is provided to change over the active/standby state of each pump, for example, any one pump may be used as an active pump or a standby pump; however, the probability of using the special fire-fighting equipment is very low, and if the special fire-fighting equipment is designed according to the using method of normal equipment (such as non-fire-fighting equipment), the complexity of a control circuit is greatly increased, and the reliability is also reduced. Further, conventional fire pump control cabinets are provided with an in-situ acoustic alarm system for monitoring the water level of the fire pool and for detecting water pump faults, but it is not practical to send out an acoustic alarm on site.

Thirdly, after the system is started, the pump cannot be stopped in the fire control room, no water flows out of the high-level water tank, the flow switch and the low-pressure switch on the water outlet pipe are reset, namely BF and BP1 in fig. 4 are switched off, BP2 is continuously switched on, when the fire control room presses a pump stopping button (such as SF4 in the row 21 in fig. 2), the water pump stops, then the pressure of the water outlet pipe is reduced due to the water in the high-level fire control water tank, so that the flow switch BF and the pressure switch BP1 on the water outlet pipe act, in addition, after the flow switch and the pressure switch act, an intermediate relay (KA 03 in the row 22 in fig. 2) driven by the fire alarm linkage module is always in an acting state (needs to be manually reset in a fire center), and the water pump cannot be reliably stopped;

in addition, the fire control room needs to feed back 7 signals (one is used and one is standby) for monitoring the water pump, and the starting failure signal cannot feed back fire control, so that more fire automatic alarm system resources are occupied; similar drawbacks are more pronounced in the dual-purpose one-standby control circuits shown in fig. 4-7.

Finally, the traditional fire pump control cabinet has the problem of high construction and pipe maintenance costs, which are reflected in the following aspects: because the power states of the main circuit and the control circuit cannot be monitored, the integrity of the circuit cannot be maintained at any time, and a fire fighting equipment power monitoring system as shown in fig. 8 must be arranged; since a control power of 220V must be employed, the power supply system must provide a working neutral (N in fig. 1) line for the control circuit in addition to the power supply lines (L1, L2, L3 lines in fig. 1) and the protection line (PE line in fig. 1); because a working zero line must be provided, a 4-pole switch must be adopted by a power supply changeover switch (ATSE); the control circuit is complex, and similar defects are more prominent in the dual-purpose one-standby control circuit shown in fig. 4 to 7.

The method is suitable for special fire-fighting equipment, and the reliability can be obviously improved; specifically, the present application is provided with an isolation transformer 202, which is isolated from the main loop power supply; the integrity of the monitoring control circuit and the main loop is maintained; the functions of the main pump, the standby pump and the pump started under the control of pressure are not interchanged.

In order to make the objects, technical solutions and advantages of the present application more apparent, the present application is described in further detail below with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are merely illustrative of the present application and are not intended to limit the present application.

The application provides a fire pump controlling means and switch board can be applied to following dry-type, wet-type fire extinguishing system in the control circuit that the fire pump directly starts, the decompression starts: firstly, a spray pump of a dry fire extinguishing system; secondly, the indoor and outdoor fire hydrant pumps are direct; thirdly, a transfer pump; and fourthly, a pressure stabilizing pump. Wherein, fire pump controlling means can be applied to fire pump control cabinet.

In one embodiment, as shown in fig. 9, a fire pump control apparatus is provided, which is described by way of example as being applied to a fire pump control cabinet, and includes pump main circuits 100; the water pump main circuit 100 comprises a main circuit breaker 101, a main contactor 103 and a main thermal relay 105; one end of the main breaker 101 is used for connecting a control power supply, and the other end is connected with one end of the main contactor 103; the other end of the main contactor 103 is connected with a corresponding fire pump through a main thermal relay 105;

the water pump control loops 200 are respectively connected with the water pump main loops 100 in a one-to-one correspondence manner; the water pump control circuit 200 comprises an isolation transformer 202, a start-stop operation control circuit 204 and an alarm indication circuit 206; the primary side input end of the isolation transformer 202 is connected between the main circuit breaker 101 and the main contactor 103, and the secondary side output end is respectively connected with the start-stop operation control circuit 204 and the alarm indicating circuit 206;

the start-stop operation control circuit 204 is used for controlling the start, stop and operation of the fire pump; the alarm indicating circuit 206 is used for feeding back an alarm signal to the fire control room when the main water pump loop 100 and the water pump control loop 200 are in failure.

Specifically, the isolation transformer 202 in the present application can be used to avoid the control loop from malfunctioning, thereby improving the reliability of the circuit. Wherein, each water pump control loop 200 can adopt an isolation transformer 202 with ungrounded secondary side to supply power; the primary side power supply of the isolation transformer 202 is taken from the load side of the main water pump circuit breaker 101, the main circuit is isolated from the control circuit, and when any part is short-circuited to the ground in one point, each control circuit can still work normally; because of being isolated from the main loop, the relay contact can not be bonded due to the large short-circuit capacity of the power supply, and further control failure is caused.

The water pump main circuit 100 in this application may include a main circuit breaker 101, a main contactor 103, and a main thermal relay 105; one end of the main breaker 101 is used for connecting a control power supply, and the other end is connected with one end of the main contactor 103; as shown in fig. 9, the other end of the main contactor 103 is connected to the corresponding fire-fighting water pump phase (i.e. pump No. 1, pump No. 2, pump No. … … N) through the main thermal relay 105;

it should be noted that the main breaker 101 is a breaker, and can be implemented by using an ac breaker or the like; the main contactor 103 is a contactor and can be realized by adopting an operating contactor, a star-delta starting contactor and the like; the main thermal relay 105 is referred to as a thermal relay.

The start-stop operation control circuit 204 is used for controlling the start, stop and operation of the fire pump; the start-stop operation control circuit 204 can be implemented by adopting a corresponding control circuit; for example, a master pump control circuit and a backup pump control circuit for one-use-one-backup; for another example, the main pump control circuit, the pressure pump control circuit, and the backup pump control circuit are used for both.

Further, the alarm indication circuit 206 is used for feeding back an alarm signal to the fire control room when the main water pump loop 100 and the control water pump loop 200 are in failure. Based on this application, no matter main loop and control circuit lose the power because of short circuit or any other reasons, the fire control room has alarm signal.

In a specific embodiment, the control power source can be a main power source or a standby power source; the fire pump control device can also comprise an automatic change-over switch; the automatic change-over switch is 3-pole ATSE;

one end of the automatic transfer switch is used for connecting a main power supply or a standby power supply, and the other end is connected with one end of the main circuit breaker 101.

Specifically, as shown in fig. 9, the automatic transfer switch in the present application may be a 3-pole ATSE; the application proposes that the isolation transformer 202 with low manufacturing cost is adopted, so that a working zero line (N) is omitted in a power line of the fire pump, and a power supply change-over switch (namely an automatic change-over switch) of each device can also be 3 poles; the system is simplified, the reliability is improved, the cost is reduced, and the operation and maintenance are simpler and more convenient.

In a specific embodiment, as shown in fig. 10, the isolation transformer 202 may be a 380V/220V secondary side ungrounded isolation transformer 202;

the water pump control circuit 200 further comprises a first fuse, a first power switch, a second fuse and a second power switch;

one end of the first fuse is connected with one end of the primary side coil of the isolation transformer 202, and the other end of the first fuse is connected with one end of the first power switch; the other end of the first power switch is connected between the main breaker 101 and the main contactor 103;

one end of the second fuse is connected with the other end of the primary side coil of the isolation transformer 202, and the other end of the second fuse is connected with one end of the second power switch; the other end of the second power switch is connected between the main breaker 101 and the main contactor 103.

Specifically, the control loop can be powered by an isolation transformer 202 with a 380V/220V secondary side ungrounded, a transformer primary side power supply is taken between the main circuit breaker 101 and the main contactor 103, each water pump control power supply is taken from the load side of the water pump main circuit breaker 101, and due to the isolation effect of the isolation transformer 202, when a point of ground fault occurs at any part, the fuse cannot be fused, so that the normal working state of the control circuit can be maintained;

in a specific embodiment, the water pump control circuit 200 may further include an insulation monitor connected to the secondary side output terminal of the isolation transformer 202;

the insulation monitor is used for monitoring the insulation state of the water pump control loop 200 and outputting an alarm signal when one point is monitored to be grounded.

Specifically, the monitoring of the control loop when one point is grounded can be realized; the control circuit can be provided with an insulation monitor for monitoring the insulation state of the control circuit, and when one point of grounding occurs, an alarm signal is sent out so as to be maintained in time. That is, the present application may be a control loop powered by isolation transformer 202 with an insulation monitoring device (i.e., insulation monitor) added.

In one particular embodiment, as shown in FIG. 10, the alarm indication circuit 206 may include an intermediate relay and a power signal; one end of the intermediate relay is connected with one end of the secondary side coil of the isolation transformer 202, and the other end of the intermediate relay is connected with the other end of the secondary side coil of the isolation transformer 202; one end of the power signal lamp is connected with one end of the secondary side coil of the isolation transformer 202 through a normally open contact of the intermediate relay, and the other end of the power signal lamp is connected with the other end of the secondary side coil of the isolation transformer 202; when the normally closed contact of the intermediate relay is connected, an alarm signal is output to the fire control room.

Specifically, the alarm indication circuit 206 may implement fault display and alarm; an intermediate relay can be arranged on the secondary side of the isolation transformer 202, when the control loop and the main loop lose power due to short circuit or other reasons, the intermediate relay loses power, the contact releases a power signal lamp to be turned off, the normally closed contact is connected, and a signal is fed back to a fire control room.

Furthermore, compared with the traditional technology, the fire-fighting water pool water level monitoring and water pump fault on-site sound alarm system does not need to be arranged; in the application, the water level signals of the fire pool and the water tank can be transmitted to a fire control room by an automatic fire alarm system to be displayed, and glass tube liquid level meters are arranged on the fire pool and the water tank, so that the water level can be visually observed; the pump room or the nearby room is generally unattended, and the fire fighting center can be provided with an acousto-optic alarm when overload occurs; this application proposes to adopt the signal lamp to report to the police and instructs, and then is showing the simplification circuit.

In the fire pump control device, the water pump control loops connected with the corresponding water pump main loops comprise isolation transformers, primary side input ends of the isolation transformers are connected between the main circuit breakers and the main contactors, and secondary side output ends of the isolation transformers are respectively connected with the start-stop operation control circuit and the alarm indicating circuit; each water pump control loop can adopt an isolation transformer with a secondary side not grounded to supply power; the primary side power supply of the isolation transformer is taken from the load side of the main breaker of the water pump, the main loop is isolated from the control circuit, and when any part is short-circuited to the ground in one point, each control loop can still work normally; because of being isolated from the main loop, the relay contact can not be bonded due to the large short-circuit capacity of the power supply, and further control failure is caused. Furthermore, based on the alarm indication circuit, the fire control room has an alarm signal no matter the main loop and the control loop lose power due to short circuit or any other reason. This application is according to the use and the operation characteristics of fire pump, has simplified control circuit, not only can improve the reliability also reduce the cost.

In one embodiment, a fire pump control apparatus is provided, which is described by way of example as applied to a backup system, comprising pump main circuits; the water pump main loop comprises a main circuit breaker, a main contactor and a main thermal relay; one end of the main breaker is used for connecting a control power supply, and the other end of the main breaker is connected with one end of the main contactor; the other end of the main contactor is connected with a corresponding fire pump through a main thermal relay;

In a specific embodiment, each main water pump loop is a main pump loop and a standby pump loop respectively; each water pump control loop is respectively a main pump control loop and a standby pump control loop;

In a specific embodiment, the first automatic control circuit comprises a first flow switch arranged on a water outlet pipe of the high-level water tank, a first pressure switch arranged on the main trunk pipe and a second time relay of which a delay contact is connected with the first main pump contactor; one end of the first flow switch and one end of the first pressure switch are both connected with one end of the secondary side coil of the isolation transformer, and the other end of the first flow switch and the other end of the first pressure switch are both connected with one end of the second time relay; the other end of the second time relay is connected with the other end of the secondary side coil of the isolation transformer;

To further illustrate the solution of the present application, a specific example is described below, as in a standby control loop shown in fig. 11, 12 and 13:

FIG. 11 is a schematic diagram of the primary pump primary circuit and the backup pump primary circuit;

as shown in fig. 12, the control loop can be powered by an isolated transformer with 380V/220V secondary side not grounded (as shown in fig. 12, columns 2 and 3), and the transformer primary side power is selected from X1 shown in fig. 11: 1. 2, each water pump control power supply is taken from the load side of the main circuit breaker of the water pump, and due to the isolation effect of the isolation transformer, when any part has a point ground fault, the fuse cannot be fused, so that the normal working state of the control circuit can be maintained;

based on the application, the main pump and the standby pump are relatively fixed in action and cannot be mutually converted, so that a control circuit is simplified.

(1) Working process of the main pump; the primary pump control circuit may be as shown in figure 12.

The first automatic control circuit can realize direct automatic control: when a fire disaster occurs and water is sprayed on site, a flow switch BF (a first flow switch in a row 6 in fig. 12) on a water outlet pipe of a high-level fire water tank and a low-pressure switch BP1 (a first pressure switch in a low-pressure state and a second pressure switch in a row 7 in fig. 12) arranged on a water outlet main pipe act, the short time delay is carried out through a time relay 1KF (a row 6 in fig. 12, a second time relay in a row 7 in fig. 12), after a signal is stable, a contact (a row 11 in fig. 12) acts, a main pump contactor 1QAC (a row 8 in fig. 12, a first main pump contactor) coil is electrified and attracted, a water pump is started, and meanwhile, the self-holding (a row 9 in fig. 12) is carried out, and an operation signal is fed back to a fire control room (a row 18 in fig. 12); the alarm valve pressure switch BP2 (which is turned on when pressure is present, in fig. 12, the 10 th row, i.e., the second pressure switch) is operated after the shower system is operated and after a delay of the delay device, the contactor 1QAC (in fig. 12, the 8 th row, i.e., the first main pump contactor) is turned on, and the process is the same as above.

The signals are directly used for starting the water pump in a linkage manner and are not influenced by the automatic or manual state of a fire control room (plate);

the first remote manual control circuit can realize remote manual control: the start and stop buttons of the manual disc of the fire control room linkage controller are directly connected to a pump room control cabinet (20 th, 21 st and 22 th rows in fig. 12) by using a special line, an intermediate relay KA01 (the 21 st row in fig. 12, namely a first intermediate relay) is controlled to act, a contact (the 13 th row in fig. 12) is connected, a contactor 1QAC (the 8 th row in fig. 12, namely a first main pump contactor) is electrified, and a water pump is started (the 12 th row in fig. 12); the control KA02 (fig. 12, row 22, i.e., the second intermediate relay) operates, the contact is turned on (fig. 12, row 11), the intermediate relay 1KA2 (fig. 12, row 9, i.e., the third intermediate relay) operates, the control KA (fig. 12, row 10) self-holds, the normally closed contact 1KA2 connected to row 8 in fig. 12 is turned off, the contactor 1QAC (fig. 12, row 8, i.e., the first main pump contactor) loses power, and the water pump is stopped.

The regulations stipulate that the duration of a fire for a spray pump is 1 hour, i.e. the spray pump may need to be stopped when the fire is not over. After the water pump is started, the flow switch BF and the pressure switch BP1 are disconnected, the alarm valve pressure switch BP2 is connected, after the water pump is stopped, the high-level fire water tank and the water BF may be reactivated at this time, the BP1 may also be reactivated, and in addition, an intermediate relay KA03 (a 24 th column in FIG. 12, namely a fourth intermediate relay) controlled by a linkage control module MO (a 24 th column in FIG. 12, namely a linkage control output module) is still in a series-parallel state, a contact (a 13 th column in FIG. 12) is connected, so that a 1KA2 (a 9 th column in FIG. 12, namely a third intermediate relay) in a 10 th column in FIG. 12 is designed to keep a contactor 1QAC (a 8 th column in FIG. 12, namely a first main pump contactor) in a reliable disconnection state after the water pump is stopped.

The first remote automatic control circuit can realize remote automatic control: when the automatic fire alarm system receives an alarm signal of a flow switch or an alarm valve set pressure switch on a water outlet pipe of a high-level water tank, the automatic fire alarm system is used as a trigger signal to control the action of an output module MO (a 24 th row in fig. 12) in a linkage mode, controls an intermediate relay of KA03 (a 24 th row in fig. 12, namely a fourth intermediate relay) in a water pump control cabinet to act, is connected with a contact (a 13 th row in fig. 12), and is powered on by 1QAC (a 8 th row in fig. 12, namely a first main pump contactor), so that a water pump is started;

the first in-situ manual control circuit can realize in-situ manual control: the control cabinet is provided with a start 1SF (figure 12, 8 th row) button and a stop 1SS button (figure 12, 8 th row) contactor 1QAC (figure 12, 8 th row, namely a first main pump contactor) which is electrified to pick up and cut off when power is lost, and the water pump is started and stopped (figure 12, 8 th row).

The alarm indicating circuit can realize fault display and alarm: an intermediate relay 1KA1 (figure 12, column 4) is arranged on the secondary side of the isolation transformer, when the control circuit and the main circuit lose power due to short circuit or other reasons, the 1KA1 loses power, the contact release power signal lamp is turned off (figure 12, column 5), the normally closed contact is turned on (figure 12, column 17), and signals are fed back to the fire center.

When the main pump has an overload failure, the thermal relay 1BB operates, the relay 1KA4 operates (fig. 12, row 15), the trouble light lights (fig. 12, row 16), and the normally closed contact opens the 1QAC circuit to stop the pump, and a signal is fed back to the fire-fighting control room (fig. 12, row 19).

The contactor should have a mechanical operating device, and when the control circuit fails, the water pump is forcibly started in a manual field.

(2) Working process of the standby pump; the operation of the backup pump is shown in fig. 13;

the control loop of the standby pump realizes automatic control by starting and stopping the operation control circuit: when the start signal of the main pump is activated, that is, after one of the 1SF, BP2, 1KF, KA01 and KA03 in the

columns

8, 10, 11, 12 and 13 in fig. 12 is activated, the intermediate relay 1KA3 (the column 12 in fig. 12) is energized, the contact is turned on (the column 31 in fig. 13), if the delay of the time relay 2KF (the column 31 in fig. 13, that is, the first time relay) is passed, the contactor 1QAC (the column 31 in fig. 13) of the main pump is still not activated, the time relay is activated and maintained (the column 34 in fig. 13), the delay contact (the column 37 in fig. 13) is turned on the backup pump contactor 2QAC (the column 35 in fig. 13, that is, the first backup pump contactor) is energized and self-maintained (the column 36 in fig. 13), and the backup pump is activated.

If the main pump stops when the main pump is overloaded during operation, because the 1KA3 contact signals of the 31 rows comprise action signals of a flow switch BF, a pressure switch BP1 on a water outlet main pipe, a warning valve pressure switch BP2, a remote manual control KA01 and a remote automatic control KA03, if the signals fail to start a main pump, or the main pump stops in operation, namely 1QAC of the 31 th row in FIG. 13 is still in an on state, a standby pump (31 st and 37 th rows in FIG. 13) is started through time delay, and operation signals are sent to a fire center (37 th and 42 th rows in FIG. 13) at the same time, and if the start fails, the signals are sent to the fire center (38 th and 41 th rows in FIG. 13).

When the main pump is short-circuited or loses power due to other reasons, the standby pump can also be started. The spare pump is overloaded and the pump is not stopped, only signals (fig. 13, 40 th and 44 th columns), and the rest is the same as the main pump. In the application, the main pump and the standby pump are not provided with the automatic pump stopping function.

The reliability can be obviously improved; each water pump control loop adopts an isolation transformer with 380V/220V secondary side ungrounded (such as 1TC in figure 12 and 2TC in figure 13) for power supply, and a primary side power supply of the transformer is taken from the load side of the main circuit breaker of the water pump to isolate the main loop from the control loop; furthermore, when any part is short-circuited to the ground in one point, the control loop can still work normally; because of being isolated with the major loop, the relay contact can not produce the bonding because of the short circuit capacity of power is big, leads to control failure. The fire control room has an alarm signal no matter the main loop and the control loop lose power due to short circuit or any other reasons.

According to the application, the control loop is simplified according to the use and operation characteristics of the fire-fighting water pump; authorized personnel can reliably stop the pump according to the actual situation of the fire extinguishing process of the equipment; when the starting of the standby pump is unsuccessful, the emergency pump can give an alarm in time in a fire control room so as to take emergency starting measures. Meanwhile, the manufacturing cost is reduced; because the isolation transformer with low manufacturing cost is adopted, a working zero line (N) is cancelled in a power line of the fire pump, and a power supply change-over switch of each device is changed from 4 poles to 3 poles; a 'fire fighting equipment power supply monitoring system' specially arranged for monitoring the integrity of a main loop is eliminated; the simplified system not only improves the reliability, but also reduces the manufacturing cost, and makes the operation and maintenance more convenient.

In one embodiment, a fire pump control device is provided, which is described by taking the device as an example of being applied to two purposes, and comprises main loops of water pumps; the water pump main loop comprises a main circuit breaker, a main contactor and a main thermal relay; one end of the main breaker is used for connecting a control power supply, and the other end of the main breaker is connected with one end of the main contactor; the other end of the main contactor is connected with a corresponding fire pump through a main thermal relay;

In a specific embodiment, each main water pump loop is a main pump loop, a pressure pump main loop and a standby pump main loop; each water pump control loop is respectively a main pump control loop, a pressure pump control loop and a standby pump control loop;

In a specific embodiment, the first automatic control circuit comprises a first flow switch arranged on the water outlet pipe of the high-level water tank and a fourth time relay of which the delay contact is connected with the first main pump contactor; one end of the first flow switch is connected with one end of the secondary side coil of the isolation transformer, and the other end of the first flow switch is connected with one end of the fourth time relay; the other end of the fourth time relay is connected with the other end of the secondary side coil of the isolation transformer;

To further illustrate the solution of the present application, a specific example is described below, such as in the dual-purpose one-standby control loop shown in fig. 14, 15, 16 and 17.

In the equipment with two functions and one device, when the first pump is started and the system pressure still does not meet the requirement, the second pump is started, and when any one of the two pumps fails, the standby pump is started. As shown in fig. 14, in the main circuit, the pump No. 1 is the main pump; the No. 2 pump is a pump (namely a pressure pump) started according to pressure, the No. 3 pump is a standby pump, a control loop of each pump is powered by an ungrounded isolation transformer, and when any part in the control circuit is grounded at one point, the system can still work normally.

In the main pump control loop, the working process of the main pump comprises the following steps: the No. 1 main pump is directly and automatically controlled by a flow switch BF (figure 15, column 6) and a pressure switch (figure 15, column 9) of an alarm valve of a high-level fire water tank through a pump, the other parts are the same as a main pump when the main pump is used for one use and one standby, and a control circuit can be shown in figure 15. It should be noted that, in this embodiment, the start-stop operation control circuit of the main pump control loop may include a first main pump contactor, and a first automatic control circuit, a first remote manual control circuit, a first remote automatic control circuit, and a first local manual control circuit that are all connected to the first main pump contactor; the first main pump contactor is a 1QAC (fig. 15, column 7), and components in the corresponding first automatic control circuit, first remote manual control circuit, first remote automatic control circuit, first local manual control circuit, and the like may correspond to corresponding components or circuits in fig. 15, and are not described herein again.

The operation of the pressure pump control circuit, i.e. pump No. 2, may include: the control circuit is as shown in fig. 16, the pump No. 2 is pressure-controlled, when the pressure still can not meet the requirement after the main pump No. 1 is started, the pressure controller BP2 (in fig. 16, the column 31) on the water outlet pipe is still connected, the pump No. 1 is already operated, the QAC 1 (in fig. 16, the column 31) is connected, the contact is closed (in fig. 16, the column 35) after the delay of the time relay (in fig. 16, the column 31 is a first time relay), the pump No. 2 contactor 2QAC 2 (in fig. 16, the column 33 is a first pressure pump contactor) is electrified and self-locked (in fig. 16, the column 34), the main pump No. 2 is started, the local operation indicator lamp is lightened (in fig. 16, the column 35), and an operation signal is sent to the fire control room.

In the overload fault, 2BB (fig. 16, column 36) operates 2KA2 (fig. 16, column 36), opens the contactor control circuit (fig. 16, column 33), stops the pump, and sends a signal to the fire center (fig. 16, columns 37 and 40).

When the main loop and the control circuit are powered off due to a short circuit or other reasons, the coil of the relay 2KA1 (figure 16, column 29) is powered off, the normally open contact is released, the local signal lamp is turned off (figure 16, column 30), and a signal is sent to a fire control room (figure 16, column 38).

The operation of the backup pump control loop, i.e., pump # 3, can be as shown in fig. 17, with pump # 3 being the backup pump, i.e., the backup pump is activated when pump # 1 or pump # 2 is not successfully activated or is stopped during operation.

When the No. 2 pump can not be started and can not work, the working process of the No. 3 pump comprises the following steps:

when the contact of the time relay 2KF (fig. 16, column 31, i.e., the first time relay) is turned on (column 50 of fig. 17) and the pump contactor No. 2QAC (fig. 16, column 33, i.e., the first pressure pump contactor) is not actuated, and the normally closed auxiliary contact (column 50 of fig. 17) thereof is still not turned off, the time relay 3KF1 (column 50 of fig. 17, i.e., the second time relay) is energized, the contact (column 58 of fig. 17) is turned on in a delayed manner, and the contactor 3QAC is energized (column 56 of fig. 17, i.e., the first backup pump contactor) and is self-maintained (column 57 of fig. 17). That is, when the pump 2 is not successfully started, the standby pump is started, the local operation indicator lamp is turned on (fig. 17, column 59), and an operation signal is sent to the fire control room.

If the main loop or the control circuit of the No. 2 pump loses power due to short circuit or other reasons in the operation process or before starting, the time relay 2KF cannot act, at the moment, the action signal of the low-pressure switch BP1 is connected to the 31 st column in the figure 16 and is connected to the automatic fire alarm system, the system linkage control output module MO2 (the 68 th column in the figure 17) enables the intermediate relay KA04 to act, and the contact (the 51 st column in the figure 17) is connected to the time relay 3KF1, so that the standby pump is started.

When the No. 1 pump can not be started and can not work, the working process of the No. 3 pump is as follows:

if the actions of the 1KA3 in the 51 st row of fig. 17 include the start signals of the high fire cistern flow switch BF for starting the No. 1 pump, the field manual button 1SF for starting, the alarm valve pressure switch BP1 for starting, the remote automatic start KA01, the remote manual start KA03, etc., i.e., when any one of these start signals is turned on, the No. 1 pump is not started, the normally closed contact (the 52 nd row of fig. 17) of the contactor 1QAC is still in the on state, the time relay 3KF2 (the 52 nd row of fig. 17, i.e., the third time relay) is energized, the snap contact (the 55 th row of fig. 17) is turned on and held, the delay contact (the 59 th row of fig. 17) is turned on, the No. 3 pump contactor 3 c (the 56 th row of fig. 17) is energized, the self-holding, the No. 3 pump is started, the local operation signal (the 59 th row of fig. 17) is illuminated, the operation signal is sent to the fire control room (the 65 th row of fig. 17 qa 65), the start is unsuccessful, the 3KA2 (the 57 th row of fig. 17) is energized, the local signal lamp is lighted (fig. 17, line 60), and a self-starting failure signal is sent to the fire control room (fig. 17, line 63).

When the pump is overloaded, namely 3BB (a thermal relay, a column 61 in figure 17) is turned on, a local signal lamp is turned on, a starting failure signal (a column 63 in figure 17) is sent to a fire control room to serve as a standby pump, and when the pump is overloaded, the water pump can still continue to operate.

When the pump No. 2 loses power to the main circuit and the control circuit due to a short circuit or other reasons, the 1KA3 is not turned on, but KA03 and KA01 (fig. 17, columns 53 and 54) are turned on, and the standby pump can be started.

In the above way, the reliability can be obviously improved; each water pump control loop adopts an isolation transformer with 380V/220V secondary side ungrounded (such as 1TC in figure 12 and 2TC in figure 13) for power supply, and a primary side power supply of the transformer is taken from the load side of the main circuit breaker of the water pump to isolate the main loop from the control loop; furthermore, when any part is short-circuited to the ground in one point, the control loop can still work normally; because of being isolated with the major loop, the relay contact can not produce the bonding because of the short circuit capacity of power is big, leads to control failure. The fire control room has an alarm signal no matter the main loop and the control loop lose power due to short circuit or any other reasons.

It will be understood by those skilled in the art that the configurations shown in fig. 9-17 are only block diagrams of some configurations relevant to the present disclosure, and do not constitute a limitation on the circuits and components to which the present disclosure may be applied, and that a particular circuit may include more or less components than shown, or combine certain components, or have a different arrangement of components.

In one embodiment, a fire pump control cabinet is provided, which comprises the fire pump control device.

In the description herein, references to the description of "some embodiments," "other embodiments," "desired embodiments," etc., mean that a particular feature, structure, material, or characteristic described in connection with the embodiment or example is included in at least one embodiment or example of the invention. In this specification, a schematic description of the above terminology may not necessarily refer to the same embodiment or example.

The technical features of the embodiments described above may be arbitrarily combined, and for the sake of brevity, all possible combinations of the technical features in the embodiments described above are not described, but should be considered as being within the scope of the present specification as long as there is no contradiction between the combinations of the technical features.

The above-mentioned embodiments only express several embodiments of the present invention, and the description thereof is more specific and detailed, but not construed as limiting the scope of the invention. It should be noted that, for a person skilled in the art, several variations and modifications can be made without departing from the inventive concept, which falls within the scope of the present invention. Therefore, the protection scope of the present patent shall be subject to the appended claims.

Claims

1. A fire pump control device is characterized in that the device is applied to a dual-purpose one-standby fire pump or a single-purpose one-standby fire pump; the device comprises:

each water pump main loop; the water pump main loop comprises a main circuit breaker, a main contactor and a main thermal relay; one end of the main breaker is used for connecting a control power supply, and the other end of the main breaker is connected with one end of the main contactor; the other end of the main contactor is connected with a corresponding fire-fighting water pump through the main thermal relay;

the water pump control loops are respectively connected with the water pump main loops in a one-to-one correspondence manner; the water pump control loop comprises an isolation transformer, a start-stop operation control circuit and an alarm indicating circuit; the primary side input end of the isolation transformer is connected between the main circuit breaker and the main contactor, and the secondary side output end of the isolation transformer is respectively connected with the start-stop operation control circuit and the alarm indicating circuit; the primary side power supply of the isolation transformer is taken from the load side of the main breaker of the water pump;

the starting, stopping and running control circuit is used for controlling the starting, stopping and running of the fire pump; the alarm indicating circuit is used for feeding back an alarm signal to a fire control room when the main loop of the water pump and the control loop of the water pump are in fault; the alarm indicating circuit comprises an intermediate relay and a power signal lamp; one end of the intermediate relay is connected with one end of the secondary side coil of the isolation transformer, and the other end of the intermediate relay is connected with the other end of the secondary side coil of the isolation transformer; one end of the power signal lamp is connected with one end of the secondary side coil of the isolation transformer through a normally open contact of the intermediate relay, and the other end of the power signal lamp is connected with the other end of the secondary side coil of the isolation transformer; when the normally closed contact of the intermediate relay is connected, the alarm signal is output to the fire control room;

wherein, in case the device is applied to a one-use one-standby fire pump:

each water pump main loop is a main pump main loop and a standby pump main loop respectively; each water pump control loop is respectively a main pump control loop and a standby pump control loop;

the start-stop operation control circuit of the main pump control loop comprises a first main pump contactor, a first automatic control circuit, a first remote manual control circuit, a first remote automatic control circuit and a first local manual control circuit, wherein the first automatic control circuit, the first remote manual control circuit, the first local manual control circuit and the first local manual control circuit are all connected with the first main pump contactor; one end of the first main pump contactor is connected with one end of the secondary side coil of the isolation transformer through corresponding relay contacts in the first automatic control circuit, the first remote manual control circuit, the first remote automatic control circuit and the first local manual control circuit, and the other end of the first main pump contactor is connected with the other end of the secondary side coil of the isolation transformer;

the start-stop operation control circuit of the standby pump control circuit comprises a first standby pump contactor and a first time relay; one end of the first time relay is connected with one end of the secondary side coil of the isolation transformer through a normally closed contact of the first main pump contactor, and the other end of the first time relay is connected with the other end of the secondary side coil of the isolation transformer; one end of the first standby pump contactor is connected with one end of the secondary side coil of the isolation transformer through a delay contact of the first time relay, and the other end of the first standby pump contactor is connected with the other end of the secondary side coil of the isolation transformer;

the first automatic control circuit comprises a first flow switch arranged on a water outlet pipe of the high-level water tank, a first pressure switch arranged on a main trunk pipe and a second time relay with a delay contact connected with the first main pump contactor; one end of the first flow switch and one end of the first pressure switch are both connected with one end of the secondary side coil of the isolation transformer, and the other end of the first flow switch and the other end of the first pressure switch are both connected with one end of the second time relay; the other end of the second time relay is connected with the other end of the secondary side coil of the isolation transformer;

the first remote manual control circuit comprises a first intermediate relay, a second intermediate relay, a third intermediate relay and a second pressure switch arranged on the alarm valve; one end of a normally open contact of the first intermediate relay is connected with one end of the secondary side coil of the isolation transformer, and the other end of the normally open contact is connected with the other end of the secondary side coil of the isolation transformer through the first main pump contactor; one end of a normally open contact of the second intermediate relay is connected with one end of a secondary side coil of the isolation transformer through a delay contact of the second time relay, and the other end of the normally open contact is connected with one end of the third intermediate relay; the other end of the third intermediate relay is connected with the other end of the secondary side coil of the isolation transformer; one end of the first main pump contactor is connected with one end of the secondary side coil of the isolation transformer through the normally closed contact of the third intermediate relay; one end of the second pressure switch is connected with one end of the secondary side coil of the isolation transformer, and the other end of the second pressure switch is connected with one end of the third intermediate relay through a normally open contact of the third intermediate relay;

the first remote automatic control circuit comprises a linkage control output module and a fourth intermediate relay connected with the linkage control output module; one end of a normally open contact of the fourth intermediate relay is connected with one end of the secondary side coil of the isolation transformer, and the other end of the normally open contact is connected with one end of the first main pump contactor through the normally closed contact of the third intermediate relay;

wherein, when the device is applied to the condition that two-purpose one is equipped with fire-fighting water pump:

each water pump main loop is respectively a main pump main loop, a pressure pump main loop and a standby pump main loop; each water pump control loop is respectively a main pump control loop, a pressure pump control loop and a standby pump control loop;

the start-stop operation control circuit of the pressure pump control circuit comprises a first pressure pump contactor, a first time relay and a first pressure controller arranged on a water outlet pipe; one end of the first pressure controller is connected with one end of the secondary side coil of the isolation transformer, and the other end of the first pressure controller is connected with one end of the first time relay through a normally open contact of the first main pump contactor; the other end of the first time relay is connected with the other end of the secondary side coil of the isolation transformer; one end of the first pressure pump contactor is connected with one end of the secondary side coil of the isolation transformer through a delay contact of the first time relay, and the other end of the first pressure pump contactor is connected with the other end of the secondary side coil of the isolation transformer;

the start-stop operation control circuit of the standby pump control circuit comprises a first standby pump contactor, a second time relay and a third time relay; one end of the second time relay is connected with one end of the secondary side coil of the isolation transformer through the normally closed contact of the first pressure pump contactor, and the other end of the second time relay is connected with the other end of the secondary side coil of the isolation transformer through the normally closed contact of the first standby pump contactor; one end of the third time relay is connected with one end of the secondary side coil of the isolation transformer through the normally closed contact of the first pressure pump contactor, and the other end of the third time relay is connected with the other end of the secondary side coil of the isolation transformer through the normally closed contact of the first standby pump contactor; one end of the first standby pump contactor is connected with one end of the secondary side coil of the isolation transformer through the delay contact of the second time relay and the delay contact of the third time relay respectively, and the other end of the first standby pump contactor is connected with the other end of the secondary side coil of the isolation transformer;

the first automatic control circuit comprises a first flow switch arranged on a water outlet pipe of the high-level water tank and a fourth time relay of which a delay contact is connected with the first main pump contactor; one end of the first flow switch is connected with one end of the secondary side coil of the isolation transformer, and the other end of the first flow switch is connected with one end of the fourth time relay; the other end of the fourth time relay is connected with the other end of the secondary side coil of the isolation transformer;

the first remote manual control circuit comprises a first intermediate relay, a second intermediate relay, a third intermediate relay and a first pressure switch arranged on the alarm valve; one end of a normally open contact of the first intermediate relay is connected with one end of the secondary side coil of the isolation transformer, and the other end of the normally open contact is connected with the other end of the secondary side coil of the isolation transformer through the first main pump contactor; one end of a normally open contact of the second intermediate relay is connected with one end of a secondary side coil of the isolation transformer through a delay contact of the second time relay, and the other end of the normally open contact is connected with one end of the third intermediate relay; the other end of the third intermediate relay is connected with the other end of the secondary side coil of the isolation transformer; one end of the first main pump contactor is connected with one end of the secondary side coil of the isolation transformer through the normally closed contact of the third intermediate relay; one end of the first pressure switch is connected with one end of the secondary side coil of the isolation transformer, and the other end of the first pressure switch is connected with one end of the third intermediate relay through a normally open contact of the third intermediate relay;

the first remote automatic control circuit comprises a linkage control output module and a fourth intermediate relay connected with the linkage control output module; one end of a normally open contact of the fourth intermediate relay is connected with one end of the secondary side coil of the isolation transformer, and the other end of the normally open contact is connected with one end of the first main pump contactor through the normally closed contact of the third intermediate relay.

2. A fire pump control apparatus as claimed in claim 1, wherein the control power supply is a primary power supply or a backup power supply; the fire pump control device also comprises an automatic change-over switch; the automatic change-over switch is 3-pole ATSE;

one end of the automatic change-over switch is used for being connected with the main power supply or the standby power supply, and the other end of the automatic change-over switch is connected with one end of the main circuit breaker.

3. A fire pump control device as claimed in claim 1, wherein the isolation transformer is a 380V/220V secondary side ungrounded isolation transformer;

one end of the second fuse is connected with the other end of the primary side coil of the isolation transformer, and the other end of the second fuse is connected with one end of the second power switch; the other end of the second power switch is connected between the main circuit breaker and the main contactor.

4. A fire pump control device as claimed in claim 1, wherein the pump control loop further comprises an insulation monitor connected to the secondary side output of the isolation transformer;

5. A fire pump control cabinet, characterized by comprising the fire pump control device of any one of claims 1 to 4.