CN216253672U - Water supplementing and air supplementing device in cooling loop of main pump frequency converter of nuclear power plant - Google Patents
Water supplementing and air supplementing device in cooling loop of main pump frequency converter of nuclear power plant Download PDFInfo
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- CN216253672U CN216253672U CN202122597873.3U CN202122597873U CN216253672U CN 216253672 U CN216253672 U CN 216253672U CN 202122597873 U CN202122597873 U CN 202122597873U CN 216253672 U CN216253672 U CN 216253672U
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Abstract
The utility model provides a water supplementing and air supplementing device in a cooling loop of a main pump frequency converter of a nuclear power plant, which comprises a cooling water tank, conveying equipment, a transformer heat exchanger, a power unit heat exchanger, a water supplementing unit and an air supplementing unit, wherein the cooling water tank is arranged in the cooling loop; the cooling water tank and the conveying equipment are sequentially connected with the transformer heat exchanger and the power unit heat exchanger which are arranged in parallel, and outlets of the transformer heat exchanger and the power unit heat exchanger are connected to the conveying equipment; the water replenishing unit comprises a water replenishing straight pipe section and a water replenishing hose section, the tail end of the water replenishing unit is connected to the conveying equipment, and the tail end of the water replenishing unit comprises a water replenishing straight pipe section and a water replenishing hose section, and the tail end of the water replenishing unit is connected to the cooling water tank. According to the utility model, the water supplementing and air supplementing unit is added on the basis of the cooling loop of the main pump frequency converter to supplement water for the cooling loop, so that the influence on the operation of the pump along with the reduction of the liquid level in the cooling water tank can be avoided, the inlet pressure of the pump can be ensured by supplementing gas, and the cavitation can be avoided; the device has simple structure and simple and convenient operation, and is beneficial to the continuous and stable operation of the device.
Description
Technical Field
The utility model belongs to the technical field of nuclear power equipment, and relates to a water and air supplementing device in a cooling loop of a main pump frequency converter of a nuclear power plant.
Background
In a nuclear power plant, a reactor coolant system of a nuclear power unit is provided with a coolant pump, which can be called a main pump, and according to the service condition of the main pump, a main pump frequency converter is required to be arranged for starting, speed regulation and power supply of a main pump motor in a normal state. Because the main pump frequency converter is in a running state for a long time and the power of the main pump is large, the frequency converter is required to have high-quality cooling performance so as to ensure the stable running of the frequency converter.
The structure of a main pump frequency converter in the existing nuclear power unit mainly comprises a transformer unit, power units, a cooling system and a control system, wherein a power supply enters each power unit after voltage transformation is carried out on the power supply through the transformer to complete rectification and inversion, so that the power supply is provided for a main pump motor, the cooling system is used for controlling the temperature of the frequency converter in the operation process, the control system carries out real-time monitoring on various parameters of the frequency converter and communicates with a full-field control system, and the frequency converter is remotely and locally controlled; the cooling system adopts a water cooling mode to cool, cooling water cools a transformer loop and a power unit loop through a transformer heat exchanger and a power unit heat exchanger, and the whole-process monitoring and control of the temperature of inlet and outlet water, the flow rate of cooling water and the ion rate are carried out, so that the stable operation of the frequency converter is ensured.
CN 206486373U discloses a water supplementing device of a cooling water system of a static variable frequency starter, wherein the water supplementing device comprises a multi-media filter, an activated carbon filter, a first safety filter, a reverse osmosis filter, a mixed bed and a pure water tank which are sequentially connected, the pure water tank is connected with a deionized water pressure tank through a first pure water pump, the deionized water pressure tank is arranged above the variable frequency starter, and the deionized water pressure tank is communicated with a cooling water tank in a deionized water cooling device through a first electric control valve; the water replenishing device further comprises a control device, a first liquid level sensor is arranged in the cooling water tank, a second liquid level sensor is installed in the deionized water pressure tank, and the first liquid level sensor, the first electric control valve, the second liquid level sensor and the first pure water pump are all connected with the control device. The water supplementing device is mainly used for supplementing water when a conventional static variable frequency starter is cooled, is numerous in equipment and complex in structure, is different from a cooling structure of a frequency converter in a nuclear power unit, and does not relate to supplementing water to a cooling system.
CN 212009395U discloses off-line moisturizing device of aerogenerator converter and cooling system thereof, and the device includes moisturizing module and control module, the moisturizing module include water tank, water pump, check valve and incite somebody to action water tank, water pump, the pipeline that the check valve feeds through, control module includes controller and relay, be provided with level sensor in the water tank, level sensor with the controller electricity is connected, the relay respectively with the controller with the water pump electricity is connected, the pipeline is linked together with aerogenerator converter water cooling system's water injection valve. The device is a water supplementing device for a generator frequency converter, and also does not relate to the connection of devices under a cooling system of a main pump frequency converter in a nuclear power unit, and does not mention the need of the water supplementing device.
In summary, for the selection of the water replenishing and air supplementing device of the cooling system of the main pump frequency converter of the nuclear power plant, water replenishing and air supplementing equipment is required to be added according to the specific structure of the cooling system so as to ensure the stable operation of the main pump frequency converter.
SUMMERY OF THE UTILITY MODEL
Aiming at the problems in the prior art, the utility model aims to provide a water supplementing and air supplementing device in a cooling loop of a main pump frequency converter of a nuclear power plant, wherein a water supplementing unit and an air supplementing unit are added on the basis of the cooling loop of the main pump frequency converter, and are combined into an original cooling system, so that water supplementing and air supplementing can be timely realized, and the problems that the running of a pump is influenced by the reduction of the liquid level in a cooling water tank along with the continuous running of the main pump frequency converter and the cavitation damage is caused by the reduction of the pressure at the inlet of the pump are avoided; the device has improved the convenience of main pump converter moisturizing tonifying qi operation, simple structure, and the cost is lower.
In order to achieve the purpose, the utility model adopts the following technical scheme:
the utility model provides a water supplementing and air supplementing device in a cooling loop of a main pump frequency converter of a nuclear power plant, which comprises a cooling water tank, conveying equipment, a transformer heat exchanger, a power unit heat exchanger, a water supplementing unit and an air supplementing unit, wherein the cooling water tank is arranged in the cooling loop; the outlet of the lower part of the cooling water tank is connected with the inlet of conveying equipment, the outlet of the conveying equipment is connected with the inlets of a transformer heat exchanger and a power unit heat exchanger which are arranged in parallel, and the outlets of the transformer heat exchanger and the power unit heat exchanger are connected to a pipeline between the cooling water tank and the conveying equipment;
the water supplementing unit comprises a water supplementing straight pipe section and a water supplementing hose section along the flowing direction of water supplementing, the tail end of the water supplementing hose section is connected to a pipeline between the cooling water tank and the conveying equipment or the conveying equipment, the air supplementing unit comprises the water supplementing straight pipe section and the air supplementing hose section along the flowing direction of air supplementing, and the tail end of the air supplementing hose section is connected to an upper inlet of the cooling water tank.
According to the utility model, for the cooling loop of the nuclear power plant when the main pump frequency converter operates, water and gas are supplemented to maintain the operation of the pump and keep the pressure along with the extension of the operation time, so that on the basis of the cooling loop of the main pump frequency converter, a water supplementing unit and a gas supplementing unit are connected at proper positions, water can be supplemented for the circulation of the cooling loop, meanwhile, the pressure of flowing liquid can be maintained due to the introduction of gas, the pressure of the inlet of conveying equipment is ensured, and the occurrence of cavitation is avoided; the transformer unit and the power unit in the original cooling loop are separately arranged, so that the cooling of the transformer unit and the power unit is also designed in parallel; the water supplementing and air supplementing device is simple in structure, simple, convenient and accurate to operate and beneficial to continuous and stable operation of the main pump frequency converter.
The following technical solutions are preferred technical solutions of the present invention, but not limited to the technical solutions provided by the present invention, and technical objects and advantageous effects of the present invention can be better achieved and achieved by the following technical solutions.
As a preferable technical scheme of the utility model, the upper part of the cooling water tank is connected with an exhaust pipe, and the exhaust pipe is provided with an exhaust valve.
And the cooling water tank is provided with a liquid level meter and a first pressure meter.
In the utility model, the cooling water tank is used as a source of cooling water of the cooling loop and is not completely filled, and a certain space is reserved at the upper part of the cooling water tank to ensure the pressure of gas, so that the flow of the cooling water can have a certain pressure, and a liquid level meter and a pressure gauge are arranged on the cooling water tank, thereby being convenient for observation.
As a preferred technical solution of the present invention, the conveying device comprises a conveying pump, and the number of the conveying devices is at least one, such as one, two, three or four.
When the number of the conveying equipment is two or more, the conveying equipment is arranged in parallel.
As a preferable technical scheme of the utility model, a first check valve and a first isolating valve are sequentially arranged on the water supplementing straight pipe section of the water supplementing unit along the flow direction of water supplementing.
According to the utility model, a metal pipe such as stainless steel can be selected as a pipeline of the water supplementing unit, a corresponding valve is arranged on the pipeline, a check valve can prevent backflow, an isolation valve controls flow, an external thread is arranged at the tail end of the water supplementing straight pipe section, and is convenient to connect with the water supplementing hose section, and joints at two ends of the water supplementing hose section are convenient to connect with the tail end of the water supplementing straight pipe section and a pipeline inlet of the conveying equipment respectively.
As a preferable technical scheme of the utility model, the air supplementing straight pipe section of the air supplementing unit is sequentially provided with a pressure regulating valve, a second pressure gauge, a second check valve, a second isolating valve and a safety valve along the air supplementing flow direction.
In the utility model, the gas supplementing unit needs to select protective gas, most commonly can select nitrogen, and the gas supply pressure is regulated by a pressure regulating valve and then is introduced into the cooling water tank through a gas supplementing pipeline, wherein the structure and the connection mode of a gas supplementing hose section are similar to those of a water supplementing hose section; the pressure in the air supply pipeline can be adjusted to 0.05-0.07 MPa through a pressure adjusting valve, so that the pressure in the cooling water tank is well controlled.
As the preferable technical scheme of the utility model, the connection between the straight pipe sections and the hose sections of the water supplementing unit and the air supplementing unit and the connection between the hose sections and pipelines or equipment are connected by adopting quick connectors.
As a preferable technical scheme of the utility model, the tail end of the air supply hose section is connected to an exhaust pipe of the cooling water tank, and air is supplied to the cooling water tank reversely.
As the preferable technical scheme of the utility model, the water supplementing and air supplementing device further comprises a deionized water tank, an outlet of the deionized water tank is connected with an inlet of the cooling water tank, and the conveying equipment is divided into a branch which is connected with an inlet of the deionized water tank.
In the utility model, the deionized water tank is mainly arranged for adjusting the conductivity of cooling water, ensuring the water quality and corroding pipelines on the surface.
As a preferable technical scheme of the utility model, the water supplementing and air supplementing device further comprises an external heat exchanger, an inlet of the external heat exchanger is connected with outlets of the transformer heat exchanger and the power unit heat exchanger, and an outlet of the external heat exchanger is connected with an inlet of the conveying equipment.
As a preferable technical solution of the present invention, the water replenishing and air replenishing device further includes a three-way valve, the three-way valve is disposed behind the external heat exchanger, and a branch is further disposed at an outlet of the transformer heat exchanger and an outlet of the power unit heat exchanger and directly connected to the three-way valve.
In the utility model, the arrangement of the external heat exchanger is mainly used for preventing the problems that the temperature of cooling water is higher after the cooling of the main pump frequency converter is carried out, heat is difficult to discharge and difficult to recycle, and the heat utilization rate in the system can also be improved; when the temperature of the fluid after heat exchange is lower, external heat exchange is not needed at the moment, so that a branch is additionally arranged, part or even all of the fluid does not pass through the external heat exchanger, and the branch is normally in a closed state and is opened when needed.
Compared with the prior art, the utility model has the following beneficial effects:
(1) according to the device, the water supplementing unit and the air supplementing unit are added on the basis of the cooling loop of the main pump frequency converter and are combined into the original cooling system, so that circulating water can be supplemented for the cooling loop in time, the situation that the running of the pump is influenced by the reduction of the liquid level in the cooling water tank along with the continuous running of the main pump frequency converter is avoided, meanwhile, the pressure of flowing liquid can be maintained by introducing gas, the pressure of the inlet of conveying equipment is ensured, and cavitation is avoided;
(2) the device has the advantages of simple structure, simple and accurate operation and lower cost, and is beneficial to the continuous and stable operation of the main pump frequency converter.
Drawings
Fig. 1 is a schematic structural diagram of a water replenishing and air supplementing device in a frequency converter cooling circuit of a main pump of a nuclear power plant according to embodiment 1 of the present invention;
the system comprises a cooling water tank, an 11-exhaust pipe, a 12-exhaust valve, a 13-liquid level meter, a 14-first pressure gauge, a 2-conveying device, a 3-transformer heat exchanger, a 4-power unit heat exchanger, a 5-water replenishing unit, a 51-water replenishing straight pipe section, a 52-water replenishing hose section, a 53-first check valve, a 54-first isolating valve, a 6-gas replenishing unit, a 61-gas replenishing straight pipe section, a 62-gas replenishing hose section, a 63 pressure regulating valve, a 64-second pressure gauge, a 65-second check valve, a 66-second isolating valve, a 67-safety valve, a 7-deionized water tank, an 8-external heat exchanger and a 9-three-way valve.
Detailed Description
In order to better illustrate the present invention and facilitate the understanding of the technical solutions of the present invention, the following embodiments are only simple examples of the present invention and do not represent or limit the scope of the present invention, which is defined by the claims.
The embodiment of the utility model provides a water supplementing and air supplementing device in a cooling loop of a main pump frequency converter of a nuclear power plant, which comprises a cooling water tank 1, a conveying device 2, a transformer heat exchanger 3, a power unit heat exchanger 4, a water supplementing unit 5 and an air supplementing unit 6; the outlet of the lower part of the cooling water tank 1 is connected with the inlet of the conveying device 2, the outlet of the conveying device 2 is connected with the inlets of the transformer heat exchanger 3 and the power unit heat exchanger 4 which are arranged in parallel, and the outlets of the transformer heat exchanger 3 and the power unit heat exchanger 4 are connected to a pipeline between the cooling water tank 1 and the conveying device 2;
the water supplementing unit 5 comprises a water supplementing straight pipe section 51 and a water supplementing hose section 52 in the flow direction of supplementing water, the tail end of the water supplementing hose section 52 is connected to a pipeline between the cooling water tank 1 and the conveying equipment 2 or the conveying equipment 2, the water supplementing unit 6 comprises a water supplementing straight pipe section 61 and a water supplementing hose section 62 in the flow direction of supplementing air, and the tail end of the water supplementing hose section 62 is connected to the upper inlet of the cooling water tank 1.
The following are typical but non-limiting examples of the utility model:
example 1:
the embodiment provides a water supplementing and air supplementing device in a cooling loop of a main pump frequency converter of a nuclear power plant, and the structural schematic diagram of the water supplementing and air supplementing device is shown in fig. 1, and the water supplementing and air supplementing device comprises a cooling water tank 1, conveying equipment 2, a transformer heat exchanger 3, a power unit heat exchanger 4, a water supplementing unit 5 and an air supplementing unit 6; the outlet of the lower part of the cooling water tank 1 is connected with the inlet of the conveying device 2, the outlet of the conveying device 2 is connected with the inlets of the transformer heat exchanger 3 and the power unit heat exchanger 4 which are arranged in parallel, and the outlets of the transformer heat exchanger 3 and the power unit heat exchanger 4 are connected to a pipeline between the cooling water tank 1 and the conveying device 2;
the water supplementing unit 5 comprises a water supplementing straight pipe section 51 and a water supplementing hose section 52 in the flow direction of supplementing water, the tail end of the water supplementing hose section 52 is connected to a pipeline between the cooling water tank 1 and the conveying equipment 2 or the conveying equipment 2, the water supplementing unit 6 comprises a water supplementing straight pipe section 61 and a water supplementing hose section 62 in the flow direction of supplementing air, and the tail end of the water supplementing hose section 62 is connected to the upper inlet of the cooling water tank 1.
The upper part of the cooling water tank 1 is connected with an exhaust pipe 11, and an exhaust valve 12 is arranged on the exhaust pipe 11;
and a liquid level meter 13 and a first pressure gauge 14 are arranged on the cooling water tank 1.
The conveying equipment 2 comprises two conveying pumps, and the conveying equipment 2 is arranged in parallel.
The water replenishing straight pipe section 51 of the water replenishing unit 5 is provided with a first check valve 53 and a first isolation valve 54 in sequence along the flow direction of the replenished water.
The air supply straight pipe section 61 of the air supply unit 6 is sequentially provided with a pressure regulating valve 63, a second pressure gauge 64, a second check valve 65, a second isolating valve 66 and a safety valve 67 along the air supply flow direction.
The pipelines of the water replenishing unit 5 and the air replenishing unit 6 are made of stainless steel; the make-up gas of the gas supplementing unit is nitrogen.
The straight pipe sections and the hose sections of the water supplementing unit 5 and the air supplementing unit 6 are connected through quick connectors, and the hose sections and the pipelines or equipment are connected through the quick connectors.
The end of the air supply hose section 62 is connected to the exhaust pipe 11 of the cooling water tank 1 to supply air to the cooling water tank 1 in the reverse direction.
The water supplementing and air supplementing device further comprises a deionized water tank 7, an outlet of the deionized water tank 7 is connected to an inlet of the cooling water tank 1, and the conveying equipment 2 is divided into a branch which is connected to an inlet of the deionized water tank 7.
The water supplementing and air supplementing device further comprises an external heat exchanger 8, an inlet of the external heat exchanger 8 is connected with outlets of the transformer heat exchanger 3 and the power unit heat exchanger 4, and an outlet of the external heat exchanger 8 is connected with an inlet of the conveying equipment 2.
The water supplementing and air supplementing device further comprises a three-way valve 9, the three-way valve 9 is arranged behind the external heat exchanger 8, and a branch is additionally arranged at the outlets of the transformer heat exchanger 3 and the power unit heat exchanger 4 and is directly connected to the three-way valve 9.
Example 2:
the embodiment provides a water supplementing and air supplementing device in a cooling loop of a main pump frequency converter of a nuclear power plant, which comprises a cooling water tank 1, a conveying device 2, a transformer heat exchanger 3, a power unit heat exchanger 4, a water supplementing unit 5 and an air supplementing unit 6; the outlet of the lower part of the cooling water tank 1 is connected with the inlet of the conveying device 2, the outlet of the conveying device 2 is connected with the inlets of the transformer heat exchanger 3 and the power unit heat exchanger 4 which are arranged in parallel, and the outlets of the transformer heat exchanger 3 and the power unit heat exchanger 4 are connected to a pipeline between the cooling water tank 1 and the conveying device 2;
the water supplementing unit 5 comprises a water supplementing straight pipe section 51 and a water supplementing hose section 52 in the flow direction of supplementing water, the tail end of the water supplementing hose section 52 is connected to a pipeline between the cooling water tank 1 and the conveying equipment 2 or the conveying equipment 2, the water supplementing unit 6 comprises a water supplementing straight pipe section 61 and a water supplementing hose section 62 in the flow direction of supplementing air, and the tail end of the water supplementing hose section 62 is connected to the upper inlet of the cooling water tank 1.
The upper part of the cooling water tank 1 is connected with an exhaust pipe 11, and an exhaust valve 12 is arranged on the exhaust pipe 11;
and a liquid level meter 13 and a first pressure gauge 14 are arranged on the cooling water tank 1.
The conveying device 2 comprises a conveying pump, and the number of the conveying devices 2 is one.
The water replenishing straight pipe section 51 of the water replenishing unit 5 is provided with a first check valve 53 and a first isolation valve 54 in sequence along the flow direction of the replenished water.
The air supply straight pipe section 61 of the air supply unit 6 is sequentially provided with a pressure regulating valve 63, a second pressure gauge 64, a second check valve 65, a second isolating valve 66 and a safety valve 67 along the air supply flow direction.
The pipelines of the water replenishing unit 5 and the air replenishing unit 6 are made of stainless steel; the supplementary gas of the air supply unit is carbon dioxide.
The straight pipe sections and the hose sections of the water supplementing unit 5 and the air supplementing unit 6 are connected through quick connectors, and the hose sections and the pipelines or equipment are connected through the quick connectors.
The end of the air supply hose section 62 is connected to the exhaust pipe 11 of the cooling water tank 1 to supply air to the cooling water tank 1 in the reverse direction.
The water supplementing and air supplementing device further comprises an external heat exchanger 8, an inlet of the external heat exchanger 8 is connected with outlets of the transformer heat exchanger 3 and the power unit heat exchanger 4, and an outlet of the external heat exchanger 8 is connected with an inlet of the conveying equipment 2.
According to the water and air supplementing device in the embodiment, when the cooling water tank needs to be supplemented with water, the cabinet door of the main pump frequency converter is opened, two ends of the water supplementing hose are respectively connected to the tail end of the water supplementing straight pipe section and the drain pipe nozzle of the delivery pump, the isolation valve is manually opened, after the liquid level of the cooling water tank is restored, the isolation valve is closed, the water supplementing hose is detached, and the cabinet door of the main pump frequency converter is closed;
when the cooling water tank needs to supplement air, opening a cabinet door of the main pump frequency converter, respectively connecting two ends of an air supplement hose to the tail end of an air supply pipeline and the outlet of an exhaust pipe, manually opening an isolation valve, controlling the pressure of air supply through an adjusting valve, closing the isolation valve after the pressure of the air in the cooling water tank is recovered, detaching the air supplement hose, and closing the cabinet door of the main pump frequency converter;
the sequence of the water supplementing and air supplementing processes needs to firstly carry out the water supplementing process, namely, firstly determining whether water is needed to be supplemented, and if the water is needed to be supplemented, firstly supplementing water and then supplementing air according to the situation, mainly considering that the gas pressure in the cooling water tank is recovered to a certain degree after the water is supplemented, and then determining whether the air is needed to be supplemented.
It can be seen from the above embodiments that the device of the present invention adds the water replenishing unit and the air replenishing unit on the basis of the cooling loop of the main pump frequency converter, and combines the water replenishing unit and the air replenishing unit into the original cooling system, so as to replenish water for the circulation of the cooling loop in time, avoid the continuous operation along with the main pump frequency converter, reduce the liquid level in the cooling water tank to influence the operation of the pump, and simultaneously, the introduction of gas can maintain the pressure of the flowing liquid, ensure the pressure of the inlet of the conveying equipment, and avoid the cavitation damage; the device has the advantages of simple structure, simplicity and accuracy in operation and low cost, and is beneficial to continuous and stable operation of the main pump frequency converter.
The applicant states that the present invention is illustrated by the above embodiments to show the detailed apparatus of the present invention, but the present invention is not limited to the above detailed apparatus, i.e. it is not meant to imply that the present invention must rely on the above detailed apparatus to be implemented. It will be apparent to those skilled in the art that any modifications to the present invention, equivalents of the means for substitution and addition of means for carrying out the utility model, selection of specific means, etc., are within the scope and disclosure of the utility model.
Claims (10)
1. A water and air supplement device in a cooling loop of a frequency converter of a main pump of a nuclear power plant is characterized by comprising a cooling water tank, conveying equipment, a transformer heat exchanger, a power unit heat exchanger, a water supplement unit and an air supplement unit; the outlet of the lower part of the cooling water tank is connected with the inlet of conveying equipment, the outlet of the conveying equipment is connected with the inlets of a transformer heat exchanger and a power unit heat exchanger which are arranged in parallel, and the outlets of the transformer heat exchanger and the power unit heat exchanger are connected to a pipeline between the cooling water tank and the conveying equipment;
the water supplementing unit comprises a water supplementing straight pipe section and a water supplementing hose section along the flowing direction of water supplementing, the tail end of the water supplementing hose section is connected to a pipeline between the cooling water tank and the conveying equipment or the conveying equipment, the air supplementing unit comprises the water supplementing straight pipe section and the air supplementing hose section along the flowing direction of air supplementing, and the tail end of the air supplementing hose section is connected to an upper inlet of the cooling water tank.
2. The water supplementing and air supplementing device in the cooling circuit of the frequency converter of the main pump of the nuclear power plant as claimed in claim 1, wherein an exhaust pipe is connected to the upper part of the cooling water tank, and an exhaust valve is arranged on the exhaust pipe;
and the cooling water tank is provided with a liquid level meter and a first pressure meter.
3. The apparatus for supplementing water and air in the frequency converter cooling circuit of the main pump of the nuclear power plant as claimed in claim 1, wherein the conveying equipment comprises at least one conveying pump;
when the number of the conveying equipment is two or more, the conveying equipment is arranged in parallel.
4. The device for supplementing water and air in the frequency converter cooling circuit of the main pump of the nuclear power plant as claimed in claim 1, wherein the water supplementing straight pipe section of the water supplementing unit is provided with a first check valve and a first isolation valve in sequence along the flow direction of water supplement.
5. The water supplementing and air supplementing device for the frequency converter cooling circuit of the main pump of the nuclear power plant as claimed in claim 1, wherein the air supplementing straight pipe section of the air supplementing unit is sequentially provided with a pressure regulating valve, a second pressure gauge, a second check valve, a second isolation valve and a safety valve along the air supplementing flow direction.
6. The device for supplementing water and air in the cooling circuit of the frequency converter of the main pump of the nuclear power plant as claimed in claim 1, wherein the connection between the straight pipe section and the hose section of the water supplementing unit and the air supplementing unit and the connection between the hose section and a pipeline or equipment are connected by adopting quick connectors.
7. The device for supplementing water and air in the cooling circuit of the frequency converter of the main pump of the nuclear power plant as recited in claim 2, wherein the tail end of the air supplementing hose section is connected to an exhaust pipe of the cooling water tank, and air is supplemented to the cooling water tank reversely.
8. The main pump inverter cooling circuit of nuclear power plant of claim 1, characterized in that, the moisturizing air make-up unit further includes a deionized water tank, the outlet of the deionized water tank is connected to the inlet of the cooling water tank, and the delivery equipment branches off a branch to be connected to the inlet of the deionized water tank.
9. The apparatus of claim 1, further comprising an external heat exchanger, wherein an inlet of the external heat exchanger is connected to the transformer heat exchanger and an outlet of the power unit heat exchanger, and an outlet of the external heat exchanger is connected to an inlet of the transportation device.
10. The apparatus of claim 9, further comprising a three-way valve, the three-way valve is disposed behind the external heat exchanger, and a branch is provided at an outlet of the transformer heat exchanger and an outlet of the power unit heat exchanger and directly connected to the three-way valve.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202122597873.3U CN216253672U (en) | 2021-10-27 | 2021-10-27 | Water supplementing and air supplementing device in cooling loop of main pump frequency converter of nuclear power plant |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202122597873.3U CN216253672U (en) | 2021-10-27 | 2021-10-27 | Water supplementing and air supplementing device in cooling loop of main pump frequency converter of nuclear power plant |
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| CN216253672U true CN216253672U (en) | 2022-04-08 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN202122597873.3U Active CN216253672U (en) | 2021-10-27 | 2021-10-27 | Water supplementing and air supplementing device in cooling loop of main pump frequency converter of nuclear power plant |
Country Status (1)
| Country | Link |
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| CN (1) | CN216253672U (en) |
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2021
- 2021-10-27 CN CN202122597873.3U patent/CN216253672U/en active Active
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