CN219197612U - Pressure reducing and pump stopping device - Google Patents
Pressure reducing and pump stopping device Download PDFInfo
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- CN219197612U CN219197612U CN202320121365.4U CN202320121365U CN219197612U CN 219197612 U CN219197612 U CN 219197612U CN 202320121365 U CN202320121365 U CN 202320121365U CN 219197612 U CN219197612 U CN 219197612U
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Abstract
The application relates to a step-down pump stop device, include: the main loop of the water pump is used for connecting the water pump and controlling the water pump to be in triangular connection or star connection; the control loop is connected with the main loop of the water pump and comprises a control voltage output unit, a starting unit, a pump stopping unit, a starting-stopping conversion unit and a delay control unit; the control voltage output unit is used for providing control voltage, the starting unit is used for outputting a starting signal, and the pump stopping unit is used for outputting a pump stopping signal; the start-stop conversion unit is used for responding to the received start signal to control the water pump to be in triangular connection, the start-stop conversion unit is used for responding to the received pump stop signal to control the water pump to be in star connection, and the delay control unit is used for responding to the received pump stop signal and controlling the water pump main loop to stop working under the condition of delaying the preset time. The pressure reducing and pump stopping device can prevent the water pump from generating hydraulic impact due to sudden stopping, so that damage to a pump room and a pipeline is reduced.
Description
Technical Field
The application relates to the technical field of electrical control, in particular to a pressure reducing and pump stopping device.
Background
When the water pump in the related art stops working, the control loop can control the main loop of the water pump to be suddenly powered off, and in the water pump and the pipeline system, the mode can cause a series of abrupt pressure alternation lifting of water flow due to sudden change of flow velocity, and hydraulic impact (namely water hammer) is generated, so that damage is caused to a pump room and a pipeline.
Disclosure of Invention
Based on this, it is necessary to provide a pressure reducing and stopping device which reduces damage to the pump room and the pipeline from hydraulic shock.
In one embodiment, the present application provides a pressure reducing pump stop device comprising: the water pump main loop is used for connecting with a water pump and controlling the water pump to be in triangular connection or star connection;
the control loop is connected with the water pump main loop and comprises a control voltage output unit, a starting unit, a pump stopping unit, a starting and stopping conversion unit and a time delay control unit, wherein the control voltage output unit is respectively connected with the starting unit, the pump stopping unit, the starting and stopping conversion unit and the time delay control unit;
the control voltage output unit is used for providing control voltage, the starting unit is used for outputting a starting signal, and the pump stopping unit is used for outputting a pump stopping signal; the start-stop conversion unit is used for responding to the received start signal to control the water pump to be in triangular connection, the start-stop conversion unit is used for responding to the received pump stopping signal to control the water pump to be in star connection, and the delay control unit is used for responding to the received pump stopping signal to control the water pump main loop to stop working under the condition of delaying preset time.
In one embodiment, the water pump main circuit includes: the three-phase electric water pump comprises a first contactor, a second contactor and a third contactor, wherein one end of a main contact of the first contactor is used for being connected with three-phase electricity, the other end of the main contact of the first contactor is used for being connected with a first port of the water pump, one end of a main contact of the second contactor is used for being connected with the three-phase electricity, and the other end of the main contact of the second contactor is respectively connected with a second port of the water pump and the main contact of the third contactor.
In one embodiment, the second contactor is interlocked with the third contactor.
In one embodiment, the water pump main circuit further comprises: and one end of the alternating current circuit breaker is used for being connected with the three-phase power, and the other end of the alternating current circuit breaker is respectively connected with the main contact of the first contactor and the main contact of the second contactor.
In one embodiment, the control voltage output unit includes: the control voltage regulator comprises a control switch, a first fuse, a second fuse and a control transformer, wherein one end of the control switch is connected with alternating current, a first input end of the control transformer is connected with the control switch through the first fuse, a second input end of the control transformer is connected with the control switch through the second fuse, and a first output end and a second output end of the control transformer are used for outputting the control voltage.
In one embodiment, the start-up unit comprises a start button, the pump-down unit comprises a pump-down button, the delay control unit comprises a first delay relay, and the start-stop conversion unit comprises a second delay relay;
one end of the pump stopping button is connected with the first output end, the other end of the pump stopping button is connected with one end of a coil of the first delay relay through a first normally open contact of the first contactor, the other end of the coil of the first delay relay is connected with the second output end, and the normally open contact of the first delay relay is connected with the pump stopping button in parallel;
one end of the starting button is connected with the first output end, the other end of the starting button is connected with one end of a coil of the first contactor through a delay breaking normally-closed contact of the first delay relay, the other end of the coil of the first contactor is connected with the second output end, and a second normally-open contact of the first contactor is connected with the starting button in parallel;
one end of a normally closed contact of the second contactor is connected with the other end of the starting button, the other end of the normally closed contact of the second contactor is connected with one end of a coil of the third contactor through a delay breaking normally closed contact of the second delay relay, the other end of the coil of the third contactor is connected with the second output end, one end of the coil of the second delay relay is connected with the other end of the normally closed contact of the second contactor, and the other end of the coil of the second delay relay is connected with the second output end;
one end of a normally closed contact of the first delay relay is connected with the other end of the starting button, the other end of the normally closed contact of the first delay relay is connected with one end of a normally closed contact of the third contactor, the other end of the normally closed contact of the third contactor is connected with one end of a time-delay closed normally open contact of the second delay relay, the other end of the time-delay closed normally open contact of the second delay relay is connected with one end of a coil of the second contactor, the other end of the coil of the second contactor is connected with the second output end, and the normally open contact of the second contactor is connected with the time-delay closed normally open contact of the second delay relay in parallel.
In one embodiment, the water pump main circuit further comprises: and one end of a thermal element of the thermal relay is connected with the main contact of the first contactor, the other end of the thermal element of the thermal relay is connected with the water pump, and the starting button is connected with the delay breaking normally-closed contact of the first delay relay through the normally-closed contact of the thermal relay.
In one embodiment, the depressurization pump stop device further comprises: the first indicator lamp, the one end of the normally open contact of thermal relay is connected first output, the other end of the normally open contact of thermal relay is connected the one end of first indicator lamp, the other end of first indicator lamp is connected the second output.
In one embodiment, the depressurization pump stop device further comprises: the second indicator lamp is connected with the coil of the second contactor in parallel, one end of a normally open contact of the third contactor is connected with the first output end, the other end of the normally open contact of the third contactor is connected with one end of the third indicator lamp, and the other end of the third indicator lamp is connected with the second output end.
In one embodiment, the depressurization pump stop device further comprises: the intermediate relay and the fourth pilot lamp, the one end of intermediate relay is connected first output, the other end of intermediate relay is connected the one end of fourth pilot lamp, the other end of fourth pilot lamp is connected the second output.
According to the pressure reducing and pump stopping device, the start-stop conversion unit and the delay control unit are arranged in the control loop, when the delay control unit receives a pump stopping signal needing to stop a pump, the pump is converted into star connection, so that the voltage applied to the pump is reduced, the rotating speed of the pump is reduced, meanwhile, the main loop of the pump is controlled to stop working after the preset time through the delay control of the delay control unit, the hydraulic impact caused by sudden stopping of the pump is prevented, and damage to a pump room and a pipeline is reduced.
Drawings
In order to more clearly illustrate the technical solutions of embodiments or conventional techniques of the present application, the drawings required for the descriptions of the embodiments or conventional techniques will be briefly described below, and it is apparent that the drawings in the following description are only some embodiments of the present application, and other drawings may be obtained according to these drawings without inventive effort for a person of ordinary skill in the art.
FIG. 1 is a block diagram of a pump down apparatus in one embodiment;
FIG. 2 is an electrical diagram of a water pump main circuit in one embodiment;
FIG. 3 is an electrical diagram of a control loop in one embodiment;
reference numerals illustrate:
the water pump main circuit 100, the control circuit 200, the control voltage output unit 210, the starting unit 220, the pump stopping unit 230, the start-stop converting unit 240 and the time delay control unit 250.
Detailed Description
In order to facilitate an understanding of the present application, a more complete description of the present application will now be provided with reference to the relevant figures. Examples of the present application are given in the accompanying drawings. This application may, however, be embodied in many different forms and is not limited to the embodiments described 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 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 the terms "first," "second," and the like, as used herein, may be used to describe various elements, but these elements are not limited by these terms. These terms are only used to distinguish one element from another element. 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. Both the first resistor and the second resistor are resistors, but they are not the same resistor.
It is to be understood that in the following embodiments, "connected" is understood to mean "electrically connected", "communicatively connected", etc., if the connected circuits, modules, units, etc., have electrical or data transfer between them.
In one embodiment, as shown in fig. 1, the present application proposes a pressure reducing and pump stopping device, comprising: the water pump main loop 100 and the control loop 200, wherein the water pump main loop 100 is used for connecting a water pump and controlling the water pump to be in triangular connection or star connection; the control loop 200 is connected with the water pump main loop 100, the control loop 200 comprises a control voltage output unit 210, a starting unit 220, a stopping pump unit 230, a starting and stopping conversion unit 240 and a time delay control unit 250, and the control voltage output unit 210 is respectively connected with the starting unit 220, the stopping pump unit 230, the starting and stopping conversion unit 240 and the time delay control unit 250; wherein, the control voltage output unit 210 is used for providing control voltage, the starting unit 220 is used for outputting a starting signal, and the pump stopping unit 230 is used for outputting a pump stopping signal; the start-stop converting unit 240 is configured to control the water pump to be in a triangle connection in response to the received start-up signal, the start-stop converting unit 240 is configured to control the water pump to be in a star connection in response to the received stop signal, and the delay controlling unit 250 is configured to control the water pump main circuit 100 to stop working in response to the received stop signal under the condition of delaying for a preset time.
Specifically, the connection mode of the water pump main circuit 100 for controlling the water pump according to the embodiment of the present application is a triangle connection or a star connection. It can be understood that the motor of the water pump in the embodiment of the application is a three-phase asynchronous motor. When the water pump is connected in a triangle mode, the coil voltage is 380V, the running current is ∈3 times of the phase current, and the starting current is large. When the water pump adopts star connection, the coil voltage is 220V, the running current is phase current, and the starting current is small. The control circuit 200 is connected to the water pump main circuit 100 and controls the water pump to be connected in a triangle or star shape.
The control voltage output unit 210 is respectively connected to the start-up unit 220, the pump stop unit 230, the start-stop conversion unit 240 and the delay control unit 250, and is used for providing control voltage to enable the control voltage to work normally. The start-stop converting unit 240 is connected to the start-up unit 220 and the pump-stop unit 230, respectively, and is configured to receive the start-up signal and the pump-stop signal, respectively. The delay control unit 250 is connected to the pump stop unit 230 and is configured to receive the pump stop signal.
The start-stop converting unit 240 receives the start signal and then controls the water pump to maintain the triangle connection. It is understood that the start-stop converting unit 240 may be in a step-down start-up mode or a direct start-up mode when the water pump is started. When the step-down starting mode is adopted, the water pump is controlled to be in star connection during starting, and is controlled to be in triangle connection after starting is completed, so that starting current is reduced.
After receiving the pump stopping signal, the start-stop converting unit 240 controls the water pump to be in star connection, and then controls the water pump main loop 100 to stop working after the delay control unit 250 delays for a preset time, thereby achieving the effect of reducing pressure and stopping the pump, preventing the water pump from generating hydraulic impact due to sudden stopping, and reducing damage to a pump room and a pipeline.
In one embodiment, as shown in fig. 2, the water pump main circuit 100 includes: the three-phase electric power supply device comprises a first contactor, a second contactor and a third contactor, wherein one end of a main contact QAC1-0 of the first contactor is used for being connected with three-phase electricity, the other end of the main contact QAC1-0 of the first contactor is used for being connected with a first port of a water pump, one end of a main contact QAC2-0 of the second contactor is used for being connected with three-phase electricity, and the other end of the main contact QAC2-0 of the second contactor is respectively connected with a second port of the water pump and a main contact QAC3-0 of the third contactor.
In particular, the primary contact QAC1-0 of the first contactor, the primary contact QAC2-0 of the second contactor, and the primary contact QAC3-0 of the third contactor are specifically connected to the three phase power in a manner as shown in FIG. 2. When the main contact QAC1-0 of the first contactor is connected with the main contact QAC2-0 of the second contactor, and the main contact QAC3-0 of the third contactor is disconnected, the water pump is in triangular connection; when the main contact QAC1-0 of the first contactor and the main contact QAC3-0 of the third contactor are on, and the main contact QAC2-0 of the second contactor is off, the water pump is in star connection; when the primary contact QAC1-0 of the first contactor is opened, the water pump primary circuit 100 is de-energized and the water pump ceases to operate.
In one embodiment, the second contactor is interlocked with the third contactor. Specifically, by setting the second contactor and the third contactor to be interlocked, when the second contactor is in the power-on action, the third contactor cannot be in the power-on action, so that the short-circuit fault of the water pump main circuit 100 is prevented from being generated due to the simultaneous actions of the second contactor and the third contactor.
In one embodiment, as shown in fig. 2, the water pump main circuit 100 further includes: and one end of the alternating current circuit breaker QA is used for being connected with three-phase electricity, and the other end of the alternating current circuit breaker QA is respectively connected with a main contact QAC1-0 of the first contactor and a main contact QAC2-0 of the second contactor. Specifically, by providing the ac circuit breaker QA, when the water pump main circuit 100 fails, the fault current can be rapidly cut off, and the accident range can be prevented from being widened.
In one embodiment, as shown in fig. 3, the control voltage output unit 210 includes: the control switch S, the first fuse FA1, the second fuse FA2 and the control transformer TC are connected, one end of the control switch S is connected with alternating current, a first input end of the control transformer TC is connected with the control switch S through the first fuse FA1, a second input end of the control transformer TC is connected with the control switch S through the second fuse FA2, and a first output end and a second output end of the control transformer TC are used for outputting control voltage.
Specifically, the control switch S is configured to control on-off of the alternating current with the first input terminal and the second input terminal of the control transformer TC, and the first fuse FA1 and the second fuse FA2 are configured to perform an overload protection function, so as to protect the control transformer TC. The first output end and the second output end of the control transformer TC are used for outputting the control voltage after transformation treatment.
In one embodiment, as shown in FIG. 3, the start unit 220 includes a start button SF, the pump stop unit 230 includes a pump stop button SS, the delay control unit 250 includes a first delay relay, and the start-stop conversion unit 240 includes a second delay relay;
one end of the pump stopping button SS is connected with a first output end, the other end of the pump stopping button SS is connected with one end of a coil KF1 of a first delay relay through a first normally open contact QAC1-1 of a first contactor, the other end of the coil KF1 of the first delay relay is connected with a second output end, and the normally open contact KF1-1 of the first delay relay is connected with the pump stopping button SS in parallel;
one end of the start button SF is connected with a first output end, the other end of the start button SF is connected with one end of a coil QAC1 of a first contactor through a delay breaking normally-closed contact KF1-2 of a first delay relay, the other end of the coil QAC1 of the first contactor is connected with a second output end, and a second normally-open contact QAC1-2 of the first contactor is connected with the start button SF in parallel;
one end of a normally closed contact QAC2-1 of the second contactor is connected with the other end of a start button SF, the other end of the normally closed contact QAC2-1 of the second contactor is connected with one end of a coil QAC3 of the third contactor through a delay break normally closed contact KF2-1 of a second delay relay, the other end of the coil QAC3 of the third contactor is connected with a second output end, one end of a coil KF2 of the second delay relay is connected with the other end of the normally closed contact QAC2-1 of the second contactor, and the other end of the coil KF2 of the second delay relay is connected with the second output end;
one end of a normally-closed contact KF1-3 of the first delay relay is connected with the other end of the start button SF, the other end of the normally-closed contact KF1-3 of the first delay relay is connected with one end of a normally-closed contact QAC3-1 of the third contactor, the other end of the normally-closed contact QAC3-1 of the third contactor is connected with one end of a delay-closed normally-open contact KF2-2 of the second delay relay, the other end of the delay-closed normally-open contact KF2-2 of the second delay relay is connected with one end of a coil QAC2 of the second contactor, the other end of the coil QAC2 of the second contactor is connected with a second output end, and the normally-open contact QAC2-2 of the second contactor is connected with the delay-closed normally-open contact KF2-2 of the second delay relay in parallel.
Specifically, the embodiment of the application adopts a mode of reducing pressure and starting to start the water pump. When the start button SF is pressed, the start button SF outputs a start signal, the coil QAC1 of the first contactor is powered on, the second normally open contact QAC1-2 of the first contactor is closed and forms self-holding, the coil QAC3 of the third contactor and the coil KF2 of the second delay relay are powered on, at this time, the main contact QAC1-0 of the first contactor and the main contact QAC3-0 of the third contactor are closed, the main contact QAC2-0 of the second contactor is opened, and the water pump is in star connection. After the coil KF2 of the second delay relay is electrified, after the delay time is reached, the delay-open normally-closed contact KF2-1 of the second delay relay is opened, so that the coil QAC3 of the third contactor is powered off, meanwhile, the delay-close normally-open contact KF2-2 of the second delay relay is closed, the coil QAC2 of the second contactor is electrified, the normally-open contact QAC2-2 of the second contactor is closed and forms self-holding, at the moment, the main contact QAC1-0 of the first contactor and the main contact QAC2-0 of the second contactor are closed, the main contact QAC3-0 of the third contactor is opened, and the water pump is in triangular connection and continuously works all the time.
When the pump stop button SS is pressed, the pump stop button SS outputs a pump stop signal, at the moment, the first normally open contact QAC1-1 of the first contactor is in a closed state, so that the coil KF1 of the first delay relay is electrified, the normally open contact KF1-1 of the first delay relay is closed and forms self-holding, meanwhile, the normally closed contact KF1-3 of the first delay relay is opened, so that the coil QAC2 of the second contactor is deenergized, the normally closed contact QAC2-1 of the second contactor is closed, so that the coil QAC3 of the third contactor is electrified, at the moment, the main contact QAC1-0 of the first contactor and the main contact QAC3-0 of the third contactor are closed, the main contact QAC2-0 of the second contactor is opened, and the water pump is converted into star connection from triangular connection. After the delay is preset, the delay-off normally-closed contact KF1-2 of the first delay relay is disconnected, so that the coil QAC1 of the first contactor is powered off, the main contact QAC1-0 of the first contactor is disconnected, the water pump main loop 100 is powered off, and the water pump stops working, thereby achieving the effects of reducing the pressure and stopping the pump.
In one embodiment, as shown in fig. 2 and 3, the water pump main circuit 100 further includes: one end of a thermal element BB-0 of the thermal relay is connected with a main contact QAC1-0 of the first contactor, the other end of the thermal element BB-0 of the thermal relay is connected with a water pump, and a start button SF is connected with a delay break normally-closed contact KF1-2 of the first delay relay through a normally-closed contact BB-1 of the thermal relay. Specifically, when the thermal element BB-0 of the thermal relay is heated, the normally closed contact BB-1 of the thermal relay is opened, so that the self-holding of the first contactor is broken, the coil QAC1 of the first contactor is de-energized, and the water pump stops working.
In one embodiment, the depressurization pump stop device further comprises: the first output end is connected to first pilot lamp PGR, and the one end of normally open contact BB-2 of thermal relay, and the one end of first pilot lamp PGR is connected to the other end of normally open contact BB-2 of thermal relay, and the second output end is connected to the other end of first pilot lamp PGR. Specifically, the first indicator light PGR is configured to indicate a closed state of the thermal relay, and when the thermal relay is heated, the normally open contact thereof is closed, so that the first indicator light PGR emits light.
In one embodiment, the depressurization pump stop device further comprises: the second indicator lamp PGG1 and the third indicator lamp PGG2, the second indicator lamp PGG1 is connected with the coil QAC2 of the second contactor in parallel, one end of the normally open contact QAC3-2 of the third contactor is connected with the first output end, the other end of the normally open contact QAC3-2 of the third contactor is connected with one end of the third indicator lamp PGG2, and the other end of the third indicator lamp PGG2 is connected with the second output end. Specifically, when the coil QAC2 of the second contactor is self-maintained to be energized, the second indicator light PGG1 emits light for indicating the closed state of the second contactor. When the coil QAC3 of the third contactor is energized, the normally open contact QAC3-2 of the third contactor is closed, thereby causing the third indicator lamp PGG2 to emit light, and the third indicator lamp PGG2 is used to indicate the closed state of the third contactor.
In one embodiment, the depressurization pump stop device further comprises: intermediate relay KA1 and fourth pilot lamp PGW, the first output is connected to intermediate relay KA 1's one end, and fourth pilot lamp PGW's one end is connected to intermediate relay KA 1's the other end, and second output is connected to fourth pilot lamp PGW's the other end. The intermediate relay KA1 is arranged between the first output end and the second output end, when the control voltage is output by the control transformer TC, the normally open contact of the intermediate relay KA1 can be closed, so that the fourth indicator lamp PGW emits light, and the fourth indicator lamp PGW is used for indicating whether the control voltage is output correctly by the control transformer TC.
In the description of the present specification, reference to the terms "some embodiments," "one embodiment," "other embodiments," and the like, means 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 present application. In this specification, schematic descriptions of the above terms do not necessarily refer to the same embodiment or example.
The technical features of the above-described embodiments may be arbitrarily combined, and all possible combinations of the technical features in the above-described embodiments are not described for brevity of description, however, as long as there is no contradiction between the combinations of the technical features, they should be considered as the scope of the description.
The above examples only represent a few embodiments of the present application, which are described in more detail and are not to be construed as limiting the scope of the claims. It should be noted that it would be apparent to those skilled in the art that various modifications and improvements could be made without departing from the spirit of the present application, which would be within the scope of the present application. Accordingly, the scope of protection of the present application is to be determined by the claims appended hereto.
Claims (10)
1. A pressure reducing pump stop device, comprising:
the water pump main loop is used for connecting a water pump and controlling the water pump to be in triangular connection or star connection;
the control circuit is connected with the water pump main circuit and comprises a control voltage output unit, a starting unit, a pump stopping unit, a start-stop conversion unit and a delay control unit, wherein the control voltage output unit is respectively connected with the starting unit, the pump stopping unit, the start-stop conversion unit and the delay control unit;
the control voltage output unit is used for providing control voltage, the starting unit is used for outputting a starting signal, and the pump stopping unit is used for outputting a pump stopping signal; the start-stop conversion unit is used for responding to the received start signal to control the water pump to be in triangular connection, the start-stop conversion unit is used for responding to the received pump stopping signal to control the water pump to be in star connection, and the delay control unit is used for responding to the received pump stopping signal to control the water pump main loop to stop working under the condition of delaying preset time.
2. The pressure reducing and pump stopping device according to claim 1, wherein the water pump main circuit comprises: the three-phase electric water pump comprises a first contactor, a second contactor and a third contactor, wherein one end of a main contact of the first contactor is used for being connected with three-phase electricity, the other end of the main contact of the first contactor is used for being connected with a first port of the water pump, one end of a main contact of the second contactor is used for being connected with the three-phase electricity, and the other end of the main contact of the second contactor is respectively connected with a second port of the water pump and the main contact of the third contactor.
3. The pressure reducing pump stop of claim 2, wherein the second contactor is interlocked with the third contactor.
4. The pressure reducing and pump stopping device according to claim 2, wherein the water pump main circuit further comprises: and one end of the alternating current circuit breaker is used for being connected with the three-phase power, and the other end of the alternating current circuit breaker is respectively connected with the main contact of the first contactor and the main contact of the second contactor.
5. The pressure reducing pump stop of any one of claims 2 to 4, wherein the control voltage output unit includes: the control voltage regulator comprises a control switch, a first fuse, a second fuse and a control transformer, wherein one end of the control switch is connected with alternating current, a first input end of the control transformer is connected with the control switch through the first fuse, a second input end of the control transformer is connected with the control switch through the second fuse, and a first output end and a second output end of the control transformer are used for outputting the control voltage.
6. The buck pump-stopping device according to claim 5, wherein the start-up unit includes a start-up button, the pump-stopping unit includes a pump-stopping button, the delay control unit includes a first delay relay, and the start-stop switching unit includes a second delay relay;
one end of the pump stopping button is connected with the first output end, the other end of the pump stopping button is connected with one end of a coil of the first delay relay through a first normally open contact of the first contactor, the other end of the coil of the first delay relay is connected with the second output end, and the normally open contact of the first delay relay is connected with the pump stopping button in parallel;
one end of the starting button is connected with the first output end, the other end of the starting button is connected with one end of a coil of the first contactor through a delay breaking normally-closed contact of the first delay relay, the other end of the coil of the first contactor is connected with the second output end, and a second normally-open contact of the first contactor is connected with the starting button in parallel;
one end of a normally closed contact of the second contactor is connected with the other end of the starting button, the other end of the normally closed contact of the second contactor is connected with one end of a coil of the third contactor through a delay breaking normally closed contact of the second delay relay, the other end of the coil of the third contactor is connected with the second output end, one end of the coil of the second delay relay is connected with the other end of the normally closed contact of the second contactor, and the other end of the coil of the second delay relay is connected with the second output end;
one end of a normally closed contact of the first delay relay is connected with the other end of the starting button, the other end of the normally closed contact of the first delay relay is connected with one end of a normally closed contact of the third contactor, the other end of the normally closed contact of the third contactor is connected with one end of a time-delay closed normally open contact of the second delay relay, the other end of the time-delay closed normally open contact of the second delay relay is connected with one end of a coil of the second contactor, the other end of the coil of the second contactor is connected with the second output end, and the normally open contact of the second contactor is connected with the time-delay closed normally open contact of the second delay relay in parallel.
7. The pressure reducing and pump stop apparatus of claim 6, wherein the water pump main circuit further comprises: and one end of a thermal element of the thermal relay is connected with the main contact of the first contactor, the other end of the thermal element of the thermal relay is connected with the water pump, and the starting button is connected with the delay breaking normally-closed contact of the first delay relay through the normally-closed contact of the thermal relay.
8. The pressure reducing pump-stopping device of claim 7, further comprising: the first indicator lamp, the one end of the normally open contact of thermal relay is connected first output, the other end of the normally open contact of thermal relay is connected the one end of first indicator lamp, the other end of first indicator lamp is connected the second output.
9. The pressure reducing pump stop of claim 6, further comprising: the second indicator lamp is connected with the coil of the second contactor in parallel, one end of a normally open contact of the third contactor is connected with the first output end, the other end of the normally open contact of the third contactor is connected with one end of the third indicator lamp, and the other end of the third indicator lamp is connected with the second output end.
10. The pressure reducing pump stop of claim 6, further comprising: the intermediate relay and the fourth pilot lamp, the one end of intermediate relay is connected first output, the other end of intermediate relay is connected the one end of fourth pilot lamp, the other end of fourth pilot lamp is connected the second output.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202320121365.4U CN219197612U (en) | 2023-02-06 | 2023-02-06 | Pressure reducing and pump stopping device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
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| CN202320121365.4U CN219197612U (en) | 2023-02-06 | 2023-02-06 | Pressure reducing and pump stopping device |
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| CN219197612U true CN219197612U (en) | 2023-06-16 |
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| CN202320121365.4U Active CN219197612U (en) | 2023-02-06 | 2023-02-06 | Pressure reducing and pump stopping device |
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