CN110388314B - Nuclear power station radioactive wastewater filtering equipment and control device thereof - Google Patents
Nuclear power station radioactive wastewater filtering equipment and control device thereof Download PDFInfo
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- CN110388314B CN110388314B CN201910598795.3A CN201910598795A CN110388314B CN 110388314 B CN110388314 B CN 110388314B CN 201910598795 A CN201910598795 A CN 201910598795A CN 110388314 B CN110388314 B CN 110388314B
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- switch assembly
- electric pump
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- 238000001914 filtration Methods 0.000 title claims abstract description 53
- 239000002354 radioactive wastewater Substances 0.000 title claims abstract description 27
- 230000001276 controlling effect Effects 0.000 abstract description 4
- 239000007788 liquid Substances 0.000 abstract description 2
- 239000002699 waste material Substances 0.000 abstract description 2
- 239000002351 wastewater Substances 0.000 description 17
- 238000010586 diagram Methods 0.000 description 7
- 238000000034 method Methods 0.000 description 6
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 5
- 238000004075 wastewater filtration Methods 0.000 description 3
- 238000010276 construction Methods 0.000 description 2
- 230000000875 corresponding Effects 0.000 description 2
- 230000005611 electricity Effects 0.000 description 2
- 238000004804 winding Methods 0.000 description 2
- 229910004682 ON-OFF Inorganic materials 0.000 description 1
- 238000005265 energy consumption Methods 0.000 description 1
- 239000000446 fuel Substances 0.000 description 1
- 230000001939 inductive effect Effects 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 238000006011 modification reaction Methods 0.000 description 1
- 230000002285 radioactive Effects 0.000 description 1
Classifications
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
- F04B—POSITIVE-DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS
- F04B49/00—Control, e.g. of pump delivery, or pump pressure of, or safety measures for, machines, pumps, or pumping installations, not otherwise provided for, or of interest apart from, groups F04B1/00 - F04B47/00
- F04B49/06—Control using electricity
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
- F04D—NON-POSITIVE-DISPLACEMENT PUMPS
- F04D15/00—Control, e.g. regulation, of pumps, pumping installations or systems
Abstract
The utility model relates to the technical field of a nuclear power station waste liquid treatment system, in particular to a nuclear power station radioactive waste water filtering device and a control device thereof, wherein the alternating current input side of a switch power supply in the control device is connected with a power supply circuit, the direct current output side of the switch power supply is connected with a normally closed switch component, the normally closed switch component is connected with a normally open switch component, the normally open switch component is connected with a control switch component, and the control switch component is connected with the direct current output side of the switch power supply; the power supply circuit is connected with the electric pump in the filtering equipment through the control switch assembly, the control switch assembly is electrified when the normally closed switch assembly and the normally open switch assembly are both in a conducting state, and the voltage output by the power supply circuit is accessed to the electric pump when the control switch assembly is electrified. Through increasing the electric pump at filtration equipment and adopting controlling means to carry out electrical control to the electric pump, make things convenient for the staff to control opening of filtration equipment, reduce the nuclear radiation influence that receives when filtering radioactive waste water in the nuclear power station.
Description
Technical Field
The application relates to the technical field of waste liquid treatment systems of nuclear power plants, in particular to a radioactive waste water filtering device of a nuclear power plant and a control device thereof.
Background
With the increasing energy consumption, the construction of the nuclear power station enters a round of peak time, but the nuclear power station needs to strengthen the safety supervision of nuclear facilities and radioactive sources in the construction and use process, so as to ensure the safety of nuclear pollution and radiation environment. The radioactive wastewater of the existing nuclear power station fuel water tank can be discharged after being purified by filtering equipment, so that the nuclear radiation or nuclear pollution caused by the direct discharge of the wastewater is prevented.
In-process at earlier stage treatment waste water, it filters radioactive waste water to need filter equipment, what traditional nuclear power station radioactive waste water filtration equipment adopted is that the pneumatic pump comes to extract radioactive waste water, make radioactive waste water filter through the filter core, then discharge from the outlet, the pneumatic pump needs external air supply in the use, control the work of pneumatic pump through external air supply, the pneumatic pump just begins work when the air supply valve is opened, and the pneumatic pump just stops working when the valve is closed, the pneumatic pump is opening and stopping at its very inconvenient control of in-process of using, the staff exposes easily under nuclear radiation environment in operation process, increase and receive the risk of radiation.
Disclosure of Invention
In view of the above, it is necessary to provide a radioactive wastewater filtering apparatus for a nuclear power plant and a control device thereof, in order to solve the problem that the wastewater filtering apparatus for a nuclear power plant is inconvenient to control.
A control device of radioactive wastewater filtering equipment of a nuclear power station comprises an electric pump control circuit and a power supply circuit, wherein the electric pump control circuit comprises a switching power supply, a normally closed switch assembly, a normally open switch assembly and a control switch assembly;
the alternating current input end of the switching power supply is connected with the power supply circuit, the direct current output end of the switching power supply is connected with the normally closed switch assembly, and the switching power supply is used for reducing the voltage transmitted by the power supply circuit and outputting the reduced voltage from the direct current output end;
the normally closed switch assembly is connected with the normally open switch assembly, the normally open switch assembly is connected with the control switch assembly, and the control switch assembly is connected with the direct current output end of the switching power supply;
the power supply circuit is connected with the electric pump through the control switch assembly, the control switch assembly is electrified when the normally closed switch assembly and the normally open switch assembly are both in a conducting state, and the voltage output by the power supply circuit is accessed to the electric pump when the control switch assembly is electrified.
Foretell controlling means is through setting up the electric pump in filtration equipment to through switching on or cutting of electric pump control circuit control supply circuit control electric pump operating condition, make things convenient for the staff to open and stop filtration equipment and control, reduce the nuclear radiation influence that receives when filtering radioactive waste water in the nuclear power station.
In one embodiment, the power supply circuit comprises a power switch assembly, one end of the power switch assembly is connected to a power supply, and the other end of the power switch assembly is connected with the control switch assembly and the switch power supply.
In one embodiment, the power supply circuit comprises a leakage protection switch assembly, and the power switch assembly is connected with the control switch assembly and the switch power supply through the leakage protection switch assembly.
In one embodiment, the electric pump control circuit further comprises an emergency stop control assembly, one end of the emergency stop control assembly is connected with the direct current output side of the switching power supply, and the other end of the emergency stop control assembly is connected with the normally closed switching assembly.
In one embodiment, the normally closed switch assembly includes a first normally closed switch and a second normally closed switch, the first normally closed switch is connected to the dc output side of the switching power supply and the second normally closed switch, and the second normally closed switch is connected to the normally open switch assembly.
In one embodiment, the normally open switch assembly comprises a first normally open switch and a second normally open switch, the first normally open switch is connected with the second normally closed switch and the control switch assembly, and the second normally open switch is connected with the second normally closed switch and the control switch assembly.
In one embodiment, the control switch assembly is a control relay, the control relay comprises a control coil and a first control contact, one end of the control coil is connected with the first normally-open switch and the second normally-open switch, and the other end of the control coil is connected with the direct current output side of the switching power supply; the power supply circuit is connected with the electric pump through a first control contact of the control relay.
In one embodiment, the electric pump control circuit further comprises a thermal relay assembly, the thermal relay assembly comprises a thermal sensing component and a first contact switch, the first control contact of the control relay is connected with the electric pump through the thermal sensing component, and the first contact switch is connected with the direct current output side of the switching power supply and the first normally closed switch.
In one embodiment, the control device further comprises a sensing circuit, wherein the sensing circuit comprises a flow sensor and a pressure difference sensor, the flow sensor is connected with the direct current output side of the switching power supply, and the pressure difference sensor is connected with the direct current output side of the switching power supply.
The filtering equipment for the radioactive wastewater of the nuclear power station comprises an electric pump and any one of the control devices, wherein a power supply circuit and a control switch assembly in the control device are electrically connected with the electric pump.
Foretell waste water filtration equipment is through setting up the electric pump in filtration equipment to switch on or cut through electric pump control circuit control supply circuit and control the operating condition of electric pump, make things convenient for the staff to open and stop filtration equipment and control, reduce the nuclear radiation influence that receives when filtering radioactive waste water in the nuclear power station.
Drawings
FIG. 1 is a schematic diagram of a nuclear power plant wastewater filtration plant provided in one embodiment;
FIG. 2 is a system diagram of a control apparatus of a radioactive wastewater filtering device of a nuclear power plant according to an embodiment;
FIG. 3 is a circuit configuration diagram of a control apparatus of the radioactive wastewater filtering device of the nuclear power plant in one embodiment;
FIG. 4 is a circuit diagram of an electric pump control circuit of a control device of the radioactive wastewater filtering apparatus in the nuclear power plant according to an embodiment;
fig. 5 is a diagram showing a structure of a sensing circuit of a control device of the radioactive wastewater filtering apparatus in the nuclear power plant according to an embodiment.
Detailed Description
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.
It will be understood that, as used herein, the terms "first," "second," and the like may be used herein to describe various devices and/or power sources, etc., but these devices and power sources are not limited by these terms. These terms are only used to distinguish one device from another. For example, a first circuit breaker may be referred to as a second circuit breaker, and similarly, a second circuit breaker may be referred to as a first circuit breaker, without departing from the scope of the present application. The first circuit breaker and the second circuit breaker are both circuit breakers, but they are not the same circuit breaker.
In one embodiment, as shown in fig. 1, there is provided a radioactive wastewater filtering apparatus for nuclear power plant, wherein the filtering apparatus at least comprises a water inlet 1, a water outlet 2, a filter 3, a centrifugal pump 4, and a control box 5, the whole filtering apparatus is integrally mounted on a trolley 6 with rollers, and corresponding valves, pressure devices, and display devices, etc., such as an exhaust valve 11, a pressure gauge 12, a filter housing 31, a vacuum exhaust valve 13, a filter drain valve 32, a filter-dedicated tool 33, a flow meter 14, a pressure display meter 121, a control switch 51, etc., are further provided in the filtering apparatus, which will not be described in detail herein. It should be noted that, a control device may be disposed in the control box 5, and the control device is electrically connected to the centrifugal pump 4 to achieve electrical control over the centrifugal pump 4, for example, the control device in the control box 5 may provide a power supply circuit to the centrifugal pump 4 to ensure that the centrifugal pump 4 can work, and meanwhile, the control device may control the power supply circuit to be turned on or off through a corresponding centrifugal pump control circuit and the like to achieve starting and stopping of the centrifugal pump 4. In one embodiment, the control box 5 can be connected remotely, a remote controller is installed at the other end of the line, and then the on-off of the power supply circuit is controlled through a switch in the remote controller, so that the starting and the stopping of the centrifugal pump 4 are remotely controlled, the remote control of the wastewater filtering equipment in the nuclear power station is realized, and the influence of radiation on workers can be avoided.
In one embodiment, as shown in fig. 2, there is provided a control apparatus for a nuclear power plant radioactive wastewater filtering apparatus, which is described by way of example as applied to the filtering apparatus of fig. 1, and includes: the power supply circuit 100 comprises a power supply circuit 200 and a power pump control circuit 200, wherein the power supply circuit 200 comprises a switching power supply 210, a normally closed switch assembly 220, a normally open switch assembly 230 and a control switch assembly 240. The ac input side of the switching power supply 210 is connected to the power supply circuit 100, the dc output side of the switching power supply 210 is connected to the normally closed switching element 220, and the switching power supply 210 is configured to step down the voltage transmitted by the power supply circuit 100 and output the stepped-down voltage from the dc output side.
The normally closed switch assembly 220 is connected with the normally open switch assembly, the normally open switch assembly 230 is connected with the control switch assembly 240, and the control switch assembly 240 is connected with the direct current output side of the switching power supply 210. The power supply circuit 100 is connected with the electric pump 300 in the filtering device through the control switch assembly 240, and the control switch assembly 240 is powered on when the normally closed switch assembly 220 and the normally open switch assembly 230 are both in a conducting state, and is connected with the voltage output by the power supply circuit 100 to the electric pump 300 when powered on.
When the filtering equipment filters the wastewater of the nuclear power station, the electric pump 300 is started, the wastewater with radioactivity firstly enters the filter element through the water inlet of the filtering equipment, is filtered by the filter element, and then is discharged from the water outlet of the filtering equipment through the electric pump. In this process, the power supply circuit 100 needs to be turned on and output the power voltage to the electric pump 300 so that the electric pump 300 can start and operate, the power supply circuit 100 is also connected with the electric pump control circuit 200, after the filtering device finishes filtering the wastewater with radioactivity, the power supply circuit 100 can be controlled to enter an off state through the electric pump control circuit 200, the power voltage is not provided to the electric pump 300 any more, and therefore the purpose of controlling the electric pump 300 to stop operating is achieved. Specifically, the ac input side of the switching power supply 210 is connected to an ac high-voltage power supply (e.g. 230V commercial power) provided by the power supply circuit 100, and after voltage reduction is performed by the switching power supply 210, a dc low-voltage power supply (e.g. 24V low voltage) is obtained and a voltage current after voltage reduction is output from the dc output side of the switching power supply 210, and the voltage current after voltage reduction flows to the normally closed switch module 220, the normally open switch module 230 connected to the normally closed switch module 220, and the control switch module 240, it should be noted that the control switch module 240 in the electric pump control circuit 200 may be a relay including a coil and a contact switch, the power supply circuit 100 is connected to the electric pump 300 through the contact switch of the relay, and the coil of the relay is located on the electric pump control circuit 200, when both the normally open switch module 210 and the normally closed switch module 220 in the electric pump control, the coil of relay just has the electric current to pass through, thereby make the relay coil to receive electricity, supply circuit 100 relay's contact switch will be closed, make supply circuit 100 become the on-state, supply electric pump 300 mains voltage, electric pump 300 just can start and begin to work this moment, and when normally open switch module 210 or normally closed switch module 220 were in the open mode, whole electric pump control circuit 200 just was in the truncation state, this makes the relay coil not have the voltage circuit to flow through, the relay coil can not receive electricity, relay contact switch in supply circuit 100 will become the open mode by the closed mode, lead to supply circuit 100 to cut, thereby make supply circuit 100 can't supply power for electric pump 300, thereby realized control electric pump 300 stop work.
Foretell controlling means through set up the electric pump in filtration equipment to switch on or cut through electric pump control circuit control power supply circuit and control the start-up or stop of electric pump, make things convenient for the staff to open and stop the filtration equipment and control, reduce the nuclear radiation influence that receives when filtering radioactive waste water in the nuclear power station.
In an embodiment, as shown in fig. 3 and 4, fig. 3 includes a circuit structure of a power supply circuit and a part of an electric pump control circuit, fig. 4 includes a detailed structure schematic diagram of the rest part of the electric pump control circuit, the power supply circuit 100 includes a power switch component-1S 1, one end of the power switch component-1S 1 is connected to a power supply (taking 230V ac mains as an example), and the other end is connected to the control switch component 240 and the switching power supply 210. The power switch assembly-1S 1 is equivalent to a main switch of the power supply circuit 100, and can be manually controlled to be turned on or off, so as to manually control the on or off of the whole power supply circuit 100.
Further, in another embodiment, as shown in fig. 3, the power supply circuit 100 further includes a leakage protection switch assembly-1F 1, and the power switch assembly-1S 1 is connected to the control switch assembly 240 and the switching power supply 210 through the leakage protection switch assembly-1F 1. The electric leakage protection switch component-1F 1 is equivalently connected with the power switch component-1S 1 in series, when electric leakage exists in the power supply circuit 100, the electric leakage protection switch component-1F 1 is automatically disconnected when detecting the electric leakage condition so as to cut off the whole power supply circuit 100, the power supply safety is ensured, the safety of the whole filtering equipment is improved, and the safety of workers in the process of filtering radioactive wastewater of the nuclear power station is further ensured.
In one embodiment, as shown in fig. 3 and 4, the electric pump control circuit 200 further includes an emergency stop control module-1S 6, one end of the emergency stop control module-1S 6 is connected to the dc output side of the switching power supply chip-1G 5, and the other end of the emergency stop control module-1S 6 is connected to the normally closed switching module 220. The switching power supply 210 includes a switching power supply chip-1G 5, a dc output side of the switching power supply chip-1G 5 has a positive terminal and a negative terminal, the positive terminal outputs 24V dc power supply voltage, the negative terminal outputs 0V dc power supply voltage, one end of the emergency stop control module-1S 6 is connected to the positive terminal of the dc output side of the switching power supply chip-1G 5, and the other end is connected to the normally closed switching module 220.
The emergency stop control module-1S 6 can control the on/off of the whole electric pump control circuit 200, for example, when the emergency stop control module-1S 6 is pressed, the dc power output from the dc output side of the switching power supply-1G 5 is cut off, and cannot flow to the subsequent normally closed switching module 220, so that the whole electric pump control circuit 200 is in the cut-off state, and thus the control switching module 240 cannot be powered on, and the voltage in the power supply circuit 100 cannot be transmitted to the electric pump 300, and cannot provide power for the electric pump 300.
The scram control component-1S 6 can play a role in emergently cutting off the control circuit of the electric pump, so that the purpose of stopping the electric pump 300 is realized, and the phenomenon that the electric pump 300 is damaged in emergency and the performance state of the whole wastewater filtering equipment is influenced is avoided.
In one embodiment, as shown in fig. 4, the normally-closed switch assembly 220 includes a first normally-closed switch-2S 41E and a second normally-closed switch-2S 42E, the first normally-closed switch-2S 41E is connected to the positive terminal of the dc output side of the switching power supply chip-1G 5 and the second normally-closed switch-2S 42E, and the second normally-closed switch-2S 42E is connected to the normally-open switch assembly 230. In a normal state, the first normally closed switch-2S 41E and the second normally closed switch-2S 42E are both in a closed state, and only when the electric pump 300 needs to be controlled to stop working, the first normally closed switch-2S 41E or the second normally closed switch-2S 42E is in an open state. Further, in one embodiment, a first normally closed switch-2S 41E may be provided in the control unit, i.e., directly adjacent to the control unit in the control box of the wastewater filtering apparatus, and when the operator approaches the wastewater filtering apparatus, the first normally closed switch-2S 41E may be opened to control the electric pump 300 to stop working; the second normally closed switch-2S 42E can be arranged in a remote control device, for example, by remote wiring, so that the second normally closed switch-2S 42E is installed in the remote control device, and thus, a worker can remotely and directly control the second normally closed switch-2S 42E to be opened, and the electric pump 300 can be remotely controlled to stop working, so that the worker does not need to contact with the wastewater filtering equipment in a close range, the influence of nuclear radiation of radioactive wastewater is prevented, and the safety of the worker is guaranteed.
Further, in another embodiment, as shown in fig. 3 and 4, the normally open switch assembly 230 includes a first normally open switch-2S 43E and a second normally open switch-2S 44E, the first normally open switch-2S 43E is connected to the second normally closed switch-2S 44E and the control switch assembly 240, and the second normally open switch-2S 44E is connected to the second normally closed switch-2S 42E and the control switch assembly 240. The first normally open switch-2S 43E and the second normally open switch-2S 44E are in an open state in a normal state, and only when the electric pump 300 needs to be controlled to start, the electric pump needs to be controlled to enter a closed state, and it should be noted that when the first normally closed switch-2S 41E and the second normally closed switch-2S 42E are in a closed normal state, any one of the first normally open switch-2S 43E and the second normally open switch-2S 44E is controlled to be in a closed state, the control switch assembly 240 is in a conducting state at this time, the power supply circuit can output voltage to the electric pump 300 at this time, and the electric pump 300 can start. Further, in one embodiment, the first normally open switch-2S 43E may be disposed in the control device, i.e., directly adjacent to the control device in the control box of the wastewater filtering device, and when the operator approaches the wastewater filtering device, the first normally open switch-2S 43E may be closed to control the start of the electric pump 300; the second normally-open switch-2S 44E can be arranged in a remote control device, for example, through remote wiring, the second normally-open switch-2S 44E is arranged in the remote control device, so that a worker can remotely and directly control the second normally-closed switch-2S 42E to be closed, the remote control electric pump 300 is started, the worker does not need to contact with a wastewater filtering device in a close range, the influence of nuclear radiation of radioactive wastewater is prevented, and the safety of the worker is guaranteed. In one embodiment, the electric pump control circuit 200 further comprises an indicator lamp-1H 6, an indicator lamp-2H 8 and an indicator lamp-2H 9, an indicator lamp-2H 9 is connected between the first normally open switch-2S 43E and the negative terminal of the DC output side of the switching power supply chip-1G 5, an indicator lamp-2H 8 is further connected between the second normally-open switch-2S 44E and the negative end of the direct current output side of the switching power supply chip-1G 5, the indicator lamp-2H 8 and the indicator lamp-2H 9 are operation indicator lamps of the electric pump 300, so that a worker can visually know the operation state of the electric pump 300 conveniently, one end of the indicator lamp-1H 6 is connected with one end of the emergency stop control component-1S 6, and the other end of the indicator lamp-1H 6 is connected with the negative end of the direct current output side of the switching power supply chip-1G 5.
Further, in one embodiment, as shown in fig. 3 and 4, the control switch assembly 240 is a control relay-2K 6, the control relay-2K 6 includes a control coil and a first control contact, one end of the control coil of the control relay-2K 6 is connected to the first normally open switch-2S 43E and the second normally open switch-2S 44E, and the other end of the control coil of the control relay-2K 6 is connected to the negative terminal of the dc output side of the switching power chip-1G 5; the power supply circuit 100 is connected with the electric pump-2M 1 through a first control contact of the control relay-2K 6. When the control coil of the control relay-2K 6 is energized, the first control contact of the control relay-2K 6 is closed, which makes the power supply circuit 100 in a conductive state, so that the power supply voltage can be output to the electric pump 300, and the electric pump 300 is started; when the control coil of the control relay-2K 6 is de-energized, the first control contact of the control relay-2K 6 is opened, which makes the power supply circuit 100 in an off state, so that the power supply voltage cannot be output to the electric pump 300, and the electric pump 300 is stopped. In another embodiment, the control relay-2K 6 further includes a second control contact, wherein the second control contact of the control relay-2K 6 is in parallel with the second normally open switch-2S 44E.
Further, in one embodiment, as shown in fig. 3 and 4, the electric pump control circuit 200 further includes a thermal relay assembly-2Q 1, the thermal relay assembly-2Q 1 includes a thermal sensing part through which a first control contact of the control relay-2K 6 is connected to the electric pump 300, and a first contact switch connected to a dc output side of the switching power supply chip-1G 5 and the first normally closed switch-2S 41E. The thermal sensing component is used for sensing the temperature of an electrode winding in the electric pump 300, when the electrode winding is overheated, the thermal relay assembly-2Q 1 can trip, the first contact switch can be automatically opened, and therefore the conduction of the electric pump control circuit 300 is cut off, the electric pump 300 stops working, the working stability of the electric pump 300 is guaranteed, and the electric pump 300 is prevented from being overheated to influence the service life.
Further, the thermal relay assembly-2Q 1 further includes a second contact switch, and the electric pump control circuit 300 further includes a first indicator light-2H 7. One end of a second contact switch of the thermal relay assembly-2Q 1 is connected with the emergency stop control assembly-1S 6, the other end of the second contact switch is connected with one end of a first indicator lamp-2H 7, the other end of the first indicator lamp-2H 7 is connected with a negative pole end of a direct current output side of the switch power supply chip-1G 5, when the thermal relay assembly-2Q 1 trips, the second contact switch is automatically turned on, and the first indicator lamp-2H 7 is used for indicating the working state of the thermal relay assembly-2Q 1, so that a worker can visually know whether the thermal relay assembly-2Q 1 trips or not.
In one embodiment, as shown in fig. 5, fig. 5 provides a schematic diagram of a sensing circuit of the control device, the sensing circuit includes a flow sensor-3B 6 and a differential pressure sensor-3B 1, the flow sensor-3B 6 is connected to the dc output side of the switching power chip-1G 5, and the differential pressure sensor-3B 1 is connected to the dc output side of the switching power chip-1G 5. The direct-current output side of the switching power supply chip-1G 5 comprises a positive end and a negative end, the flow sensor-3B 6 is connected between the positive end and the negative end of the direct-current output side of the switching power supply chip-1G 5, the pressure difference sensor-3B 1 is connected between the positive end and the negative end of the direct-current output side of the switching power supply chip-1G 5, the flow sensor-3B 6 is used for monitoring flow data of wastewater in the wastewater filtering equipment, and the pressure difference sensor-3B 1 is used for monitoring whether pressure difference exists in a wastewater channel in the filtering equipment. The induction circuit is also provided with a digital display meter-3P 1, and the digital display meter-3P 1 is used for displaying a differential pressure signal on site.
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 application, 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 concept of the present application, which falls within the scope of protection of the present application. Therefore, the protection scope of the present patent shall be subject to the appended claims.
Claims (10)
1. The control device of the radioactive wastewater filtering equipment of the nuclear power station is characterized by comprising an electric pump control circuit and a power supply circuit, wherein the electric pump control circuit comprises a switching power supply, a normally closed switch assembly, a normally open switch assembly and a control switch assembly; wherein the normally closed switch component comprises a first normally closed switch and a second normally closed switch,
the alternating current input side of the switching power supply is connected with the power supply circuit, the direct current output side of the switching power supply is connected with a first normally closed switch of the normally closed switch assembly, the first normally closed switch is connected with a second normally closed switch, the second normally closed switch is connected with the normally open switch assembly, and the switching power supply is used for reducing the voltage transmitted by the power supply circuit and outputting the reduced voltage from the direct current output side;
the normally open switch assembly is connected with the control switch assembly, and the control switch assembly is connected with the direct current output side of the switching power supply;
the power supply circuit is connected with an electric pump in the filtering equipment through the control switch assembly, the control switch assembly is electrified when the normally closed switch assembly and the normally open switch assembly are both in a conducting state, and the voltage output by the power supply circuit is accessed to the electric pump when the control switch assembly is electrified.
2. The control device of claim 1, wherein the power supply circuit comprises a power switch assembly, one end of the power switch assembly is connected to a power supply, and the other end of the power switch assembly is connected to the control switch assembly and the switching power supply.
3. The control device of claim 2, wherein the power supply circuit comprises a leakage protection switch assembly, and a power switch assembly is connected with the control switch assembly and the switching power supply through the leakage protection switch assembly.
4. The control device of claim 1, wherein the electric pump control circuit further comprises an emergency stop control assembly, one end of the emergency stop control assembly is connected to the dc output side of the switching power supply, and the other end of the emergency stop control assembly is connected to the normally closed switching assembly.
5. The control device of claim 1, wherein the first normally closed switch is disposed in the control device and the second normally closed switch is disposed in the remote control device.
6. The control device of claim 5, wherein the normally open switch assembly includes a first normally open switch and a second normally open switch, the first normally open switch being connected to the second normally closed switch and the control switch assembly, the second normally open switch being connected to the second normally closed switch and the control switch assembly.
7. The control device of claim 6, wherein the control switch assembly is a control relay, the control relay comprises a control coil and a first control contact, one end of the control coil is connected with the first normally-open switch and the second normally-open switch, and the other end of the control coil is connected with a direct current output side of the switching power supply; the power supply circuit is connected with the electric pump through a first control contact of the control relay.
8. The control device of claim 7, wherein the electric pump control circuit further comprises a thermal relay assembly including a thermal sensing member and a first contact switch, a first control contact of the control relay being connected to the electric pump through the thermal sensing member, the first contact switch being connected to the dc output side of the switching power supply and to a first normally closed switch.
9. The apparatus of claim 1, wherein the control device further comprises a sensing circuit, the sensing circuit comprising a flow sensor and a differential pressure sensor, the flow sensor being coupled to the dc output side of the switching power supply, the differential pressure sensor being coupled to the dc output side of the switching power supply.
10. A nuclear power plant radioactive wastewater filtering apparatus, comprising an electric pump and a control device according to any one of claims 1 to 9, wherein a power supply circuit and a control switch assembly in the control device are electrically connected to the electric pump.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910598795.3A CN110388314B (en) | 2019-07-04 | 2019-07-04 | Nuclear power station radioactive wastewater filtering equipment and control device thereof |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910598795.3A CN110388314B (en) | 2019-07-04 | 2019-07-04 | Nuclear power station radioactive wastewater filtering equipment and control device thereof |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN110388314A CN110388314A (en) | 2019-10-29 |
| CN110388314B true CN110388314B (en) | 2020-11-24 |
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| CN110388314A (en) | 2019-10-29 |
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