CN210573401U - Water supply flow control system - Google Patents
Water supply flow control system Download PDFInfo
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- CN210573401U CN210573401U CN201921742851.8U CN201921742851U CN210573401U CN 210573401 U CN210573401 U CN 210573401U CN 201921742851 U CN201921742851 U CN 201921742851U CN 210573401 U CN210573401 U CN 210573401U
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Abstract
The utility model provides a water supply flow control system is applied to the nuclear island, and this water supply flow control system includes: the water supply system comprises a first water supply pipe, a second water supply pipe and a water supply device, wherein a first end of the first water supply pipe is a water injection port, and an isolation valve is arranged in the first water supply pipe along the direction from the first end to the second end of the first water supply pipe; a second water feed pipe in which an isolation valve is provided in a direction from a first end to a second end of the second water feed pipe; and the first end of the third water feeding pipe is communicated with the first position of the second water feeding pipe, the second end of the third water feeding pipe is communicated with the pressure accumulation cavity type pressure stabilizer, and the first position is the position between the first end of the second water feeding pipe and the isolating valve arranged on the second water feeding pipe. The embodiment of the utility model provides a can improve water supply system reliability.
Description
Technical Field
The utility model relates to a nuclear power technical field especially relates to a water feed flow control system.
Background
The new energy industry develops rapidly, and nuclear power is one of the new energy industry. The main water supply system is an important component of a nuclear power system, and a destructive water hammer phenomenon caused by pressure fluctuation exists in the operation process of the main water supply system. Generally, water hammer is apt to cause accidents in water supply pipes in a water supply system. Therefore, the existing main water supply system has poor reliability.
SUMMERY OF THE UTILITY MODEL
An object of the embodiment of the utility model is to provide a water supply flow control system has solved the relatively poor problem of current water supply system reliability.
In order to achieve the above object, the embodiment of the utility model provides a water supply flow control system is applied to the nuclear island, and water supply flow control system includes:
the water supply system comprises a first water supply pipe, a second water supply pipe and a water supply device, wherein a first end of the first water supply pipe is a water injection port, and an isolation valve is arranged in the first water supply pipe along the direction from the first end to the second end of the first water supply pipe;
a second water feed pipe in which an isolation valve is provided in a direction from a first end to a second end of the second water feed pipe;
and the first end of the third water feeding pipe is communicated with the first position of the second water feeding pipe, the second end of the third water feeding pipe is communicated with the pressure accumulation cavity type pressure stabilizer, and the first position is the position between the first end of the second water feeding pipe and the isolating valve arranged on the second water feeding pipe.
Optionally, a pressure stabilizer control valve is arranged in the third water supply pipe and located between the first position and the pressure accumulation cavity type pressure stabilizer, and is used for opening or closing the pressure accumulation cavity type pressure stabilizer.
Optionally, an isolation valve is arranged in the first water supply pipe along a direction from the first end to the second end of the first water supply pipe, and a first isolation valve, a second isolation valve and a third isolation valve are sequentially arranged in the first water supply pipe;
and an isolation valve is arranged in the second water supply pipe along the direction from the first end to the second end of the second water supply pipe, and a fourth isolation valve and a fifth isolation valve are sequentially arranged in the second water supply pipe.
Optionally, a first communication port is arranged on the first water supply pipe and located between the first end of the first water supply pipe and the first isolation valve, and the first end of the second water supply pipe is communicated with the first communication port;
and a second communication port is arranged on the first water supply pipe and positioned between the second isolation valve and the third isolation valve, and a second end of the second water supply pipe is communicated with the second communication port.
Optionally, the first end of the second water supply pipe is communicated with the first communication port through the fourth isolation valve, and the second end of the second water supply pipe is communicated with the second communication port through the fifth isolation valve.
Optionally, a first regulating valve is arranged in the first water supply pipe and between the first isolating valve and the second isolating valve;
and a second regulating valve is arranged in the second water supply pipe and between the fourth isolating valve and the fifth isolating valve.
Optionally, a first flowmeter is arranged in the first water supply pipe and between the water injection port and the first communication port;
and a second flowmeter is arranged in the second water supply pipe and positioned between the first position and the fourth isolating valve.
Optionally, the first isolation valve, the second isolation valve and the third isolation valve in the first water supply pipe, and the fourth isolation valve and the fifth isolation valve in the second water supply pipe are respectively electrically connected to the safety-level power supply line in the nuclear island.
Optionally, the first isolation valve, the second isolation valve and the third isolation valve in the first water supply pipe, and the fourth isolation valve and the fifth isolation valve in the second water supply pipe are respectively electrically connected to a standby power supply.
Optionally, the first isolation valve, the second isolation valve and the third isolation valve in the first water supply pipe, and the fourth isolation valve and the fifth isolation valve in the second water supply pipe are all arranged outside the reactor plant.
The embodiment of the utility model provides a pair of feed water flow control system, include: the water supply system comprises a first water supply pipe, a second water supply pipe and a water supply device, wherein a first end of the first water supply pipe is a water injection port, and an isolation valve is arranged in the first water supply pipe along the direction from the first end to the second end of the first water supply pipe; a second water feed pipe in which an isolation valve is provided in a direction from a first end to a second end of the second water feed pipe; and the first end of the third water feeding pipe is communicated with the first position of the second water feeding pipe, the second end of the third water feeding pipe is communicated with the pressure accumulation cavity type pressure stabilizer, and the first position is the position between the first end of the second water feeding pipe and the isolating valve arranged on the second water feeding pipe. Therefore, the pressure accumulation cavity type pressure stabilizer can absorb partial pressure in the first water supply pipe or the second water supply pipe, and the reliability of the water supply system is improved.
Drawings
Fig. 1 is a schematic structural diagram of a feedwater flow control system provided by an embodiment of the present invention.
Fig. 2 is a schematic structural diagram of another feedwater flow control system provided in the embodiment of the present invention.
Fig. 3 is a schematic structural diagram of another feedwater flow control system according to an embodiment of the present invention.
Fig. 4 is a schematic structural diagram of another feedwater flow control system according to an embodiment of the present invention.
Fig. 5 is a schematic structural diagram of another feedwater flow control system according to an embodiment of the present invention.
Detailed Description
The technical solutions in the embodiments of the present invention will be described clearly and completely with reference to the accompanying drawings in the embodiments of the present invention, and it is obvious that the described embodiments are some, not all, of the embodiments of the present invention. Based on the embodiments in the present invention, all other embodiments obtained by a person skilled in the art without creative work belong to the protection scope of the present invention.
As shown in fig. 1, an embodiment of the present invention provides a water supply control system, which is applied to a nuclear island, and the water supply control system includes:
the water supply system comprises a first water supply pipe 1, wherein a first end of the first water supply pipe is a water filling port 101, and an isolation valve is arranged in the first water supply pipe along the direction from the first end to the second end of the first water supply pipe;
a second water feed pipe 2 in which an isolation valve is provided in a direction from a first end to a second end thereof;
and a third water supply pipe 3, wherein the first end of the third water supply pipe is communicated with the first position of the second water supply pipe, the second end of the third water supply pipe is communicated with the pressure accumulation cavity type pressure stabilizer 302, and the first position is the position between the first end of the second water supply pipe and an isolation valve arranged on the second water supply pipe.
The third water supply pipe 3 where the pressure accumulation cavity type pressure stabilizer 302 is located is communicated with the second water supply pipe 2, and is communicated with the first water supply pipe 1 through the first end of the second water supply pipe 2.
Wherein, the first end of first feed pipe 1 can be in steam turbine factory building 4, and the high temperature heating system in the steam turbine factory building 4 supplies water through water filling port 101, isolation valve on the first feed pipe isolation valve on second feed pipe 2 and the second feed pipe 2 third feed pipe 3 and pressure accumulation chamber formula stabiliser 302 can be in safe factory building.
Wherein the operation of the water supply system comprises: referring to fig. 2, when the water supply system is in low-load operation (the operation power of the generator is less than 15% of the maximum power of the generator), the water supply system only operates in a water supply bypass pipeline, the pressure storage cavity type voltage stabilizer 302 absorbs partial pressure, and the water supply bypass pipeline comprises a first end of a first water supply pipe 1, a second water supply pipe 2 and a second end of the first water supply pipe 1; referring to fig. 3, when the water supply system is in high-load operation (the operation power of the generator is 15% -100% of the maximum power of the generator), the bypass pipeline of the water supply system and the main pipeline operate simultaneously, the pressure storage cavity type voltage stabilizer 302 absorbs partial pressure, and the main pipeline of the water supply comprises a first water supply pipe 1; referring to fig. 4, in case of an accident of the operation of the water supply system (for example, a water pipe rupture occurs at the second end of the first water supply pipe 1), the isolation valve in the first water supply pipe 1 performs isolation simultaneously with the isolation valve in the second water supply pipe 2, and the pressure accumulation chamber type pressure stabilizer 302 absorbs a part of the pressure.
Wherein, the caliber of the first water supply pipe 1 is larger than that of the second water supply pipe 2.
In this embodiment, when safety isolation is performed during operation of the water supply system, the isolation valve provided in the first water supply pipe 101 or the isolation valve provided in the second water supply pipe 2 performs isolation, and rapid water supply isolation causes the first water supply pipe 1 or the second water supply pipe 2 to generate high pressure fluctuation, and the pressure accumulation cavity type pressure stabilizer 302 in the third water supply pipe increases reliability of the water supply system by absorbing a part of the pressure.
Optionally, referring to fig. 5, a pressurizer control valve 301 is disposed in the third water supply pipe 3 at a position between the first position and the pressure accumulation chamber type pressurizer 302, and is used for opening or closing the pressure accumulation chamber type pressurizer 302.
Wherein the potentiostat control valve 301 is an electric potentiostat control valve.
In this embodiment, when the water supply system is running or an accident occurs and isolation is performed, the control valve 301 of the pressure stabilizer is opened; when the water supply system stops operating, the voltage stabilizer 302 is closed, and the voltage stabilizer control valve 301 is an electric voltage stabilizer control valve, so that the voltage stabilizer is convenient to open or close.
Optionally, referring to fig. 5, an isolation valve is arranged in the first water supply pipe 1 along a direction from the first end to the second end of the first water supply pipe 1, and a first isolation valve 104, a second isolation valve 106 and a third isolation valve 107 are arranged in sequence;
the second feed pipe is provided with an isolation valve in the direction from the first end to the second end of the second feed pipe, and a fourth isolation valve 202 and a fifth isolation valve 204 are sequentially arranged in the second feed pipe.
The first isolation valve 104 and the second isolation valve 106 are gas-liquid linkage isolation valves, and the third isolation valve 107, the fourth isolation valve 202, and the fifth isolation valve 204 are electric isolation valves. The gas-liquid linkage isolation valve can perform isolation quickly (for example, within 2 seconds), and the electric isolation valve can perform isolation slowly (for example, within 15 seconds).
In this embodiment, when the water supply system is operating at a high load and performing safety isolation, the first isolation valve 104 and the second isolation valve 106 in the first water supply line 1 can perform isolation of water supply in the first water supply line 1 at a high speed, and the fourth isolation valve 202 and the fifth isolation valve 204 in the second water supply line 2 perform isolation at a low speed. After the first water supply pipe 1 completes isolation, because the second water supply pipe 2 is in a communicated state in the process of slow isolation, part of pressure generated by the first water supply pipe 1 in the process of fast isolation is borne by the second water supply pipe 2, and part of pressure is absorbed by the pressure accumulation cavity type voltage stabilizer, so that the system reliability is improved.
Optionally, referring to fig. 5, a first communication port is arranged on the first water supply pipe 1 and located between the first end of the first water supply pipe 1 and the first isolation valve 104, and the first end of the second water supply pipe 2 is communicated with the first communication port;
and a second communication port is arranged on the first water supply pipe 1 and between the second isolation valve and the third isolation valve 106 and 107, and a second end of the second water supply pipe 2 is communicated with the second communication port.
Wherein the number of the second water feed pipes 1 is not limited.
In this embodiment, the water supply system may include a plurality of first water supply pipes 1, the first ends of the plurality of first water supply pipes 1 are communicated with the water filling port 101, the second ends of the plurality of first water supply pipes 1 are communicated with the check valve 108, and the plurality of first water supply pipes 1 may increase the total water supply amount of the water supply system, reduce the probability of accidents occurring when the water supply system is operated at a high load, and increase the reliability of the system.
Alternatively, referring to fig. 5, the first end of the second feed pipe 2 is communicated with the first communication port through the fourth isolation valve 202, and the second end of the second feed pipe is communicated with the second communication port through the fifth isolation valve 204.
Wherein the number of the second water feed pipes 2 is not limited.
In this embodiment, the water supply system can be provided with a plurality of second water supply pipes 2, the first ends of the plurality of second water supply pipes 2 are communicated with the first communication port on the first water supply pipe 1, the second ends of the plurality of water supply pipes 2 are communicated with the second communication port on the first water supply pipe 1, and by providing the plurality of second water supply pipelines 2, the pressure generated in the execution isolation process of the first water supply pipe 1 can be reduced, and the reliability of the system is improved.
Optionally, referring to fig. 5, a first regulating valve 105 is disposed in the first feed water 1 at a position between the first isolation valve 104 and the second isolation valve 106;
a second regulating valve 203 is arranged in the second water supply pipe and between the fourth isolating valve 202 and the fifth isolating valve 204.
Wherein the first regulating valve 105 regulates the water flow through the first feed pipe 1 and the second regulating valve 203 regulates the water flow through the second feed pipe.
In this embodiment, when the water supply system is running, the staff utilizes the first regulating valve 105 or the second regulating valve 203 to adjust the water flow according to the running power of the generator to meet the water supply flow demand, so as to avoid the water supply system being in a high-load running state for a long time and improve the reliability of the system.
Optionally, referring to fig. 5, a first flowmeter 102 is disposed in the first water supply pipe 1 and between the water filling port and the first communication port;
a second flow meter 201 is provided in the second feed pipe at a position between the first position and the fourth isolation valve 202.
Wherein the first flow meter 102 measures the water flow at the water injection port 101 and the second flow meter 201 measures the water flow in the second feed pipe 2.
In the first feed pipe 1, a test orifice plate 103 for setting a maximum value of the feed water flow rate of the feed water system is provided at a position between the first flowmeter 101 and the first isolation valve 104.
In this embodiment, when the water supply system is in operation, the pressure accumulation cavity type pressure stabilizer 302 can absorb partial pressure in the first water supply pipe 1 or the second water supply pipe 2, and ensure stable water supply pressure in the water supply system, thereby improving the measurement accuracy of the first water supply flow meter 102 and the second water supply flow 101, reducing water supply pressure fluctuation caused by water supply flow measurement errors, reducing the adjustment action times of the first adjusting valve 105 or the second adjusting valve 203, prolonging the service life of the adjusting valve, and improving the reliability of the system.
Optionally, referring to fig. 5, the first isolation valve 104, the second isolation valve 106 and the third isolation valve 107 in the first water supply pipe 1, and the fourth isolation valve 202 and the fifth isolation valve 204 in the second water supply pipe 2 are electrically connected to the safety power supply column in the nuclear island, respectively.
When the nuclear island is in a design benchmark accident, the safety level power supply column can normally supply power.
Note that, the potentiostat control valve 301 in the third water supply pipe 3 is electrically connected to the safety-class power supply line in the nuclear island.
In this embodiment, if an accident occurs during the operation of the water supply system (for example, a water supply pipe between the check valve 108 and the steam generator 109 is broken), the isolation valve and the pressurizer control valve 301 are both electrically connected to the safety power supply line, and the safety power supply line can supply power normally under an accident condition, so that the first isolation valve 104, the second isolation valve 106, the third isolation valve 107, the fourth isolation valve 202, the fifth isolation valve 204 and the pressurizer control valve 301 work normally under the accident condition, and the system reliability is improved.
Optionally, referring to fig. 5, the first isolation valve 104, the second isolation valve 106 and the third isolation valve 107 in the first water supply pipe 1, and the fourth isolation valve 202 and the fifth isolation valve 204 in the second water supply pipe 2 are electrically connected to the standby power supply respectively.
Wherein the backup power source may include at least one of a generator and a mobile power source. And the generator can be a diesel generator, in addition, when the standby power supply is a mobile power supply, the first water supply pipe 1, the second water supply pipe 2 and the third water supply pipe 3 need to be provided with an electric connection interface for being electrically connected with the mobile power supply, so that under the accident condition, the first isolation valve 104, the second isolation valve 106, the third isolation valve 107, the fourth isolation valve 202 and the fifth isolation valve 204 can be supplied with power through the mobile power supply, and the reliability of the water supply system is further improved.
In addition, the 3 d regulator control valve 301 in the third water supply pipe is electrically connected with a standby power supply.
In this embodiment, the water supply system further includes a standby power supply, and the first isolation valve 104, the second isolation valve 106, and the third isolation valve 107 in the first water supply pipe 1, the fourth isolation valve 202 and the fifth isolation valve 204 in the second water supply pipe 2, and the 3-voltage regulator control valve 301 in the third water supply pipe are all electrically connected to the standby power supply, so that the reliability of the water supply system can be further improved.
Optionally, referring to fig. 5, the first isolation valve 104, the second isolation valve 106 and the third isolation valve 107 in the first water supply pipe 1, and the fourth isolation valve 202 and the fifth isolation valve 204 in the second water supply pipe are all disposed outside the reactor plant.
Wherein the reactor building contains a check valve 108 and a steam generator 109.
It should be noted that the pressurizer control valve 301 and the pressure storage cavity type pressurizer 302 in the third water supply pipe 3 are arranged outside the reactor plant.
In this embodiment, if an accident occurs during the operation of the water supply system (for example, a water supply pipe between the check valve 108 and the steam generator 109 is broken), the check valve in the reactor building may be used to prevent water from flowing backwards, and simultaneously, the first isolation valve 104, the second isolation valve 106, the third isolation valve 107, the fourth isolation valve 202, the fifth isolation valve 204 and the pressure stabilizer control valve 301 outside the reactor building are opened, so as to effectively prevent the reactant in the reactor from entering the safety building 5 and the steam turbine building 4, and improve the reliability of the system.
The above description is only for the specific embodiments of the present invention, but the protection scope of the present invention is not limited thereto, and any person skilled in the art can easily think of the changes or substitutions within the technical scope of the present invention, and all should be covered within the protection scope of the present invention. Therefore, the protection scope of the present invention shall be subject to the protection scope of the claims.
Claims (10)
1. A feedwater flow control system, applied to nuclear islands, comprising:
the water supply system comprises a first water supply pipe, a second water supply pipe and a water supply device, wherein a first end of the first water supply pipe is a water injection port, and an isolation valve is arranged in the first water supply pipe along the direction from the first end to the second end of the first water supply pipe;
a second water feed pipe in which an isolation valve is provided in a direction from a first end to a second end of the second water feed pipe;
and the first end of the third water feeding pipe is communicated with the first position of the second water feeding pipe, the second end of the third water feeding pipe is communicated with the pressure accumulation cavity type pressure stabilizer, and the first position is the position between the first end of the second water feeding pipe and the isolating valve arranged on the second water feeding pipe.
2. The feedwater flow control system of claim 1, wherein a pressurizer control valve is provided in said third feedwater line at a location between said first location and said pressure accumulation chamber pressurizer for opening or closing said pressure accumulation chamber pressurizer.
3. The feedwater flow control system of claim 1, wherein said first feedwater pipe has a first isolation valve, a second isolation valve, and a third isolation valve disposed therein in that order along a direction from a first end to a second end of said first feedwater pipe;
and an isolation valve is arranged in the second water supply pipe along the direction from the first end to the second end of the second water supply pipe, and a fourth isolation valve and a fifth isolation valve are sequentially arranged in the second water supply pipe.
4. The feedwater flow control system of claim 3, wherein a first communication port is provided in said first feedwater pipe at a location between a first end of said first feedwater pipe and said first isolation valve, and a first end of said second feedwater pipe communicates with said first communication port;
and a second communication port is arranged on the first water supply pipe and positioned between the second isolation valve and the third isolation valve, and a second end of the second water supply pipe is communicated with the second communication port.
5. The feedwater flow control system of claim 4, wherein a first end of said second feedwater pipe communicates with said first communication port through said fourth isolation valve, and a second end of said second feedwater pipe communicates with said second communication port through said fifth isolation valve.
6. The feedwater flow control system of claim 3, wherein a first regulating valve is disposed in said first feedwater line at a location between said first and second isolation valves;
and a second regulating valve is arranged in the second water supply pipe and between the fourth isolating valve and the fifth isolating valve.
7. The feedwater flow control system of claim 4, wherein a first flow meter is provided in said first feedwater pipe at a position between said water injection port and said first communication port;
and a second flowmeter is arranged in the second water supply pipe and positioned between the first position and the fourth isolating valve.
8. The feedwater flow control system of claim 3, wherein said first, second and third isolation valves in said first feedwater line, and said fourth and fifth isolation valves in said second feedwater line are each electrically connected to a safety supply column within said nuclear island.
9. The feedwater flow control system of claim 3, wherein said first, second and third isolation valves in said first feedwater line, and said fourth and fifth isolation valves in said second feedwater line are each electrically connected to a backup power source, respectively.
10. The feedwater flow control system of claim 3, wherein said first isolation valve, said second isolation valve, and said third isolation valve in said first feedwater line, and said fourth isolation valve and said fifth isolation valve in said second feedwater line are located outside of said reactor building.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201921742851.8U CN210573401U (en) | 2019-10-16 | 2019-10-16 | Water supply flow control system |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201921742851.8U CN210573401U (en) | 2019-10-16 | 2019-10-16 | Water supply flow control system |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN210573401U true CN210573401U (en) | 2020-05-19 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201921742851.8U Active CN210573401U (en) | 2019-10-16 | 2019-10-16 | Water supply flow control system |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN210573401U (en) |
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2019
- 2019-10-16 CN CN201921742851.8U patent/CN210573401U/en active Active
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