CN111682478A - Combined device and method for keeping micro-positive pressure of closed bus for nuclear power plant - Google Patents
Combined device and method for keeping micro-positive pressure of closed bus for nuclear power plant Download PDFInfo
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- CN111682478A CN111682478A CN202010264447.5A CN202010264447A CN111682478A CN 111682478 A CN111682478 A CN 111682478A CN 202010264447 A CN202010264447 A CN 202010264447A CN 111682478 A CN111682478 A CN 111682478A
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- ball valve
- adjusting ball
- manual adjusting
- pressure
- closed bus
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- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02G—INSTALLATION OF ELECTRIC CABLES OR LINES, OR OF COMBINED OPTICAL AND ELECTRIC CABLES OR LINES
- H02G5/00—Installations of bus-bars
- H02G5/06—Totally-enclosed installations, e.g. in metal casings
-
- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02G—INSTALLATION OF ELECTRIC CABLES OR LINES, OR OF COMBINED OPTICAL AND ELECTRIC CABLES OR LINES
- H02G5/00—Installations of bus-bars
- H02G5/06—Totally-enclosed installations, e.g. in metal casings
- H02G5/063—Totally-enclosed installations, e.g. in metal casings filled with oil or gas
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- Chemical & Material Sciences (AREA)
- Oil, Petroleum & Natural Gas (AREA)
- Control Of Fluid Pressure (AREA)
Abstract
A combined type micro-positive pressure maintaining device for a closed bus for a nuclear power plant is characterized in that an inlet manual valve of an intelligent anti-condensation device is connected with an air-entraining pipeline A through a three-way joint A; the gas leading pipeline A comprises a manual adjusting ball valve A, a manual adjusting ball valve with a pressure gauge, a manual adjusting ball valve B, a pipeline pressure regulator and a three-way joint B; the upper end of a manual adjusting ball valve A is connected with an SAR gas source of a pneumatic system, the lower end of the manual adjusting ball valve A is connected with a manual adjusting ball valve with a pressure gauge, the manual adjusting ball valve with the pressure gauge is connected with the right end of a three-way joint A, the left end of the three-way joint A is connected with a manual adjusting ball valve B, the manual adjusting ball valve B is connected with a pipeline adjuster, the pipeline adjuster is connected with the lower end of the three-way joint B, the right end of the B is connected with a manual adjusting ball valve C, and the manual adjusting ball valve C is connected with an outlet pipe of; the upper end of the tee joint B is connected with a rubber corrugated inlet pipe, the rubber corrugated inlet pipe is connected with a gas-entraining pipeline B, and conveying gas enters a closed bus.
Description
Technical Field
The technology relates to the technical field of electricity and ventilation, in particular to a combined type enclosed bus micro-positive pressure device and method for a nuclear power plant, which provide a moisture-proof and antifouling function for an isolated phase enclosed bus.
Background
In order to prevent dust and moisture outside the isolated phase closed bus shell from entering the shell to contaminate conductors and insulators and reduce the insulation level of the bus to finally cause flashover discharge so as to damage equipment and stable operation of the system, an intelligent anti-condensation device is arranged outside the closed bus system, and dried air is blown into the isolated phase closed bus through a pipeline so that the interior of the isolated phase closed bus is always kept at micro-positive pressure of 300-1500 Pa.
The existing intelligent anti-condensation device for the nuclear power plant is complex in operation, high in maintenance cost and free of special drainage pipelines, and the reliability of part of sensors with control functions is insufficient, so that the intelligent anti-condensation device cannot be normally started due to accidental faults. In addition, when the unit is overhauled, the power failure of an upstream electric panel of the intelligent anti-condensation device needs to be overhauled, the device loses a power supply, the micro-positive pressure of the enclosed bus is lost, and the insulation performance of the enclosed bus cannot be guaranteed.
According to the requirements, a micro-positive pressure device is required to be put into the power generating unit before starting and during the period of stopping the power generating unit, and in addition, compressed air for instruments is preferably adopted as a main air source for micro-positive pressure of a closed bus because the ocean environment of Fuqing nuclear power stations has high air humidity and salt mist.
Disclosure of Invention
The invention aims to: the combined closed bus micro-positive pressure device and the method for the nuclear power plant are easy to implement, convenient to operate and maintain and capable of achieving closed bus micro-positive pressure gas source redundancy.
The technical scheme of the invention is as follows: a combined type micro-positive pressure maintaining device for a closed bus for a nuclear power plant is characterized in that an inlet manual valve of an intelligent anti-condensation device is connected with an air-entraining pipeline A through a three-way joint A; the gas leading pipeline A comprises a manual adjusting ball valve A, a manual adjusting ball valve with a pressure gauge, a manual adjusting ball valve B, a pipeline pressure regulator and a three-way joint B;
the upper end of a manual adjusting ball valve A is connected with an SAR gas source of a pneumatic system, the lower end of the manual adjusting ball valve A is connected with a manual adjusting ball valve with a pressure gauge, the manual adjusting ball valve with the pressure gauge is connected with the right end of a three-way joint A, the left end of the three-way joint A is connected with a manual adjusting ball valve B, the manual adjusting ball valve B is connected with a pipeline adjuster, the pipeline adjuster is connected with the lower end of the three-way joint B, the right end of the B is connected with a manual adjusting ball valve C, and the manual adjusting ball valve C is connected with an outlet pipe of; the upper end of the tee joint B is connected with a rubber corrugated inlet pipe, the rubber corrugated inlet pipe is connected with a gas-entraining pipeline B, and conveying gas enters a closed bus.
The intelligent anti-condensation device is connected with the closed bus through a gas return pipe line A and a gas return pipe line B, the gas return pipe line B comprises a pointer type pressure gauge, a safety valve and a rubber corrugated gas return pipe, and the gas return pipe line A is connected with the rubber corrugated gas return pipe.
The air return line A is connected with the rubber corrugated air return pipe through a flange.
The upper end of the tee joint B is connected with the rubber corrugated inlet pipe through a flange.
A method for a combined type device for keeping micro-positive pressure of a closed bus for a nuclear power plant is characterized by comprising the following steps: the method comprises the following steps:
s1: confirming whether an SAR air source of the compressed air system is available, if so, entering S2, and if not, entering S4;
s2: when an SAR air source of the air compression system is available, opening a manual adjusting ball valve A and a manual adjusting ball valve B, and closing a manual adjusting ball valve C;
s3: and (3) slowly adjusting the opening of the manual adjusting ball valve with the pressure gauge, enabling the gas of the SAR gas source of the air compression system to sequentially enter a closed bus through the manual adjusting ball valve A, the manual adjusting ball valve with the pressure gauge, the manual adjusting ball valve B, the pipeline pressure regulator, the rubber corrugated inlet pipe and the gas introducing pipeline B, and maintaining the pressure of the closed bus between 300Pa and 500 Pa. The safety valve jumps and releases pressure when the pressure of the closed bus exceeds 2500 Pa.
In the step S3, a pointer type pressure gauge monitors the pressure of the closed bus;
s4: closing the manual adjusting ball valve A, the manual adjusting ball valve B and the manual adjusting ball valve with the pressure gauge when the SAR air source of the air compression system is unavailable; opening a manual adjusting ball valve C;
s5: the intelligent anti-condensation device is powered on, and air is supplied to the enclosed bus through the intelligent anti-condensation device. When the pressure of the closed bus reaches 500Pa, the intelligent anti-condensation device is automatically stopped, and is automatically started when the pressure is lower than 300 Pa.
S5, compressed gas generated by the intelligent anti-condensation device enters the closed bus through the manual adjusting ball valve C, the rubber corrugated outlet pipe and the air-entraining pipeline B
In the S3, the pressure of the closed bus is maintained between 300Pa and 500 Pa.
In S3, the safety valve trips to release pressure when the closed bus pressure exceeds 2500 Pa.
A pointer pressure gauge monitors the enclosed bus pressure.
In S5, the intelligent anti-condensation device is automatically stopped when the pressure of the closed bus 19 reaches 500Pa, and is automatically started when the pressure is lower than 300 Pa.
In S5, the intelligent anti-condensation device generates compressed gas which enters the closed bus through the manual adjusting ball valve C, the rubber corrugated outlet pipe and the air-entraining pipeline B.
The invention has the following remarkable effects: the method is easy to implement, convenient to operate and maintain, and capable of achieving redundancy of the closed bus micro positive pressure gas source.
Drawings
FIG. 1 is a schematic view of a combined type closed bus micro-positive pressure maintaining device for a nuclear power plant;
in the figure: 1-manually adjusting a ball valve A; 2-manually adjusting the ball valve with a pressure gauge; 3-manually adjusting the ball valve B; 4-pipeline pressure regulator; 5-manually adjusting the ball valve C; 6-safety valve; 7-pointer type pressure gauge; 8-rubber corrugated inlet pipe, 9-rubber corrugated outlet pipe; 10-bleed line A (DN25), 11-return line A (DN25), 12-bleed line B (DN 60); 13-muffler line B (DN 60); 14-intelligent anti-condensation device, the internal structure of which is shown in the figure; 15-three way connection A; 16-three-way connection B; 17-inlet manual valve, 18-outlet pipe, 19-enclosed bus and 20-compressed air system SAR air source
Detailed Description
As shown in figure 1, the combined type maintaining closed bus micro-positive pressure device for the nuclear power plant is characterized in that an inlet manual valve 17 of an intelligent anti-condensation device 14 is connected with a bleed air pipeline A10 through a three-way joint A15. The air guide pipeline A10 comprises a manual adjusting ball valve A1, a manual adjusting ball valve 2 with a pressure gauge, a manual adjusting ball valve B3, a pipeline pressure regulator 4 and a three-way joint B16;
the upper end of a manual adjusting ball valve A1 is connected with an SAR air source 20 of a pneumatic system, the lower end of the manual adjusting ball valve A1 is connected with a manual adjusting ball valve 2 with a pressure gauge, the manual adjusting ball valve 2 with the pressure gauge is connected with the right end of a three-way joint A15, the left end of a three-way joint A15 is connected with a manual adjusting ball valve B3, the manual adjusting ball valve B3 is connected with a pipeline adjuster 4, the pipeline adjuster 4 is connected with the lower end of a three-way joint B16, the right end of a B16 is connected with a manual adjusting ball valve C5, and the manual adjusting ball valve C5 is connected with an outlet pipe 18 of an; the upper end of the tee joint B16 is connected with a rubber corrugated inlet pipe 8 through a flange, the rubber corrugated inlet pipe 8 is connected with a bleed air pipeline B12, and conveying gas enters the closed bus 19.
The intelligent anti-condensation device 14 is connected with the closed bus through a gas return line A11 and a gas return line B13, the gas return line B13 comprises a pointer type pressure gauge 7, a safety valve 6 and a rubber corrugated gas return pipe 9, and the gas return line A11 is connected with the rubber corrugated gas return pipe 9 through a flange.
A combined method for keeping micro-positive pressure of a closed bus for a nuclear power plant comprises the following steps:
s1: confirming whether the SAR air source 20 of the compressed air system is available, if so, entering S2, and if not, entering S4;
s2: when the SAR air source 20 of the compressed air system is available, opening a manual adjusting ball valve A1 and a manual adjusting ball valve B3, and closing a manual adjusting ball valve C5;
s3: the opening of a manual adjusting ball valve 2 with a pressure gauge is slowly adjusted, and gas of an SAR gas source 20 of the air compression system sequentially passes through a manual adjusting ball valve A1, the manual adjusting ball valve 2 with the pressure gauge, a manual adjusting ball valve B3, a pipeline pressure regulator 4, a rubber corrugated inlet pipe 8 and a gas introducing pipeline B12 and enters a closed bus 19;
s4: if the SAR air source 20 of the air compression system is unavailable, closing the manual adjusting ball valve A1, the manual adjusting ball valve B3 and the manual adjusting ball valve 2 with the pressure gauge; opening the manual regulating ball valve C5;
s5: the intelligent anti-condensation device 14 is powered on, and the closed bus 19 is supplied with air through the intelligent anti-condensation device 14.
Claims (9)
1. The utility model provides a nuclear power plant keeps enclosed bus pressure-fired device which characterized in that with the combination formula: wherein, an inlet manual valve (17) of the intelligent anti-condensation device (14) is connected with the air-entraining pipeline A (10) through a three-way joint A (15); the gas leading pipeline A (10) comprises a manual adjusting ball valve A (1), a manual adjusting ball valve with a pressure gauge (2), a manual adjusting ball valve B (3), a pipeline pressure regulator (4) and a three-way joint B (16);
the upper end of a manual adjusting ball valve A (1) is connected with an SAR air source (20) of a compressed air system, the lower end of the manual adjusting ball valve A is connected with a manual adjusting ball valve (2) with a pressure gauge, the manual adjusting ball valve (2) with the pressure gauge is connected with the right end of a three-way joint A (15), the left end of the three-way joint A (15) is connected with a manual adjusting ball valve B (3), the manual adjusting ball valve B (3) is connected with a pipeline adjuster (4), the pipeline adjuster (4) is connected with the lower end of the three-way joint B (16), the right end of the B (16) is connected with a manual adjusting ball valve C (5), and the manual adjusting ball valve C (5) is connected with an outlet pipe (18) of an intelligent anti-condensation; the upper end of the tee joint B (16) is connected with a rubber corrugated inlet pipe (8), the rubber corrugated inlet pipe (8) is connected with a bleed air pipeline B (12), and conveying gas enters a closed bus (19).
The intelligent anti-condensation device (14) is connected with the closed bus through a gas return pipe line A (11) and a gas return pipe line B (13), the gas return pipe line B (13) comprises a pointer type pressure gauge (7), a safety valve (6) and a rubber corrugated gas return pipe (9), and the gas return pipe line A (11) is connected with the rubber corrugated gas return pipe (9).
2. The combined type closed bus bar micro-positive pressure maintaining device for the nuclear power plant according to claim 1, characterized in that: the air return line A (11) is connected with the rubber corrugated air return pipe (9) through a flange.
3. The combined type closed bus bar micro-positive pressure maintaining device for the nuclear power plant according to claim 1, characterized in that: the upper end of the tee joint B (16) is connected with the rubber corrugated inlet pipe (8) through a flange.
4. A method of applying the combined positive micro-pressure maintaining device for a closed bus bar of a nuclear power plant according to claim 1, characterized in that: the method comprises the following steps:
s1: confirming whether the SAR air source (20) of the compressed air system is available, if so, entering S2, and if not, entering S4;
s2: the SAR air source (20) of the air compression system is available, a manual adjusting ball valve A (1) and a manual adjusting ball valve B (3) are opened, and a manual adjusting ball valve C (5) is closed;
s3: the opening of a manual adjusting ball valve (2) with a pressure gauge is slowly adjusted, gas of an SAR gas source (20) of the compressed air system sequentially passes through a manual adjusting ball valve A (1), the manual adjusting ball valve (2) with the pressure gauge, a manual adjusting ball valve B (3), a pipeline pressure regulator (4), a rubber corrugated inlet pipe (8) and a gas introducing pipeline B (12) and enters a closed bus (19), and the pressure of the closed bus (19) is maintained between 300Pa and 500 Pa; the safety valve (6) jumps and releases pressure when the pressure of the closed bus (19) exceeds 2500 Pa;
in the S3, a pointer type pressure gauge (7) monitors the pressure of the closed bus (19);
s4: if the SAR air source (20) of the air compression system is unavailable, closing the manual adjusting ball valve A (1), the manual adjusting ball valve B (3) and the manual adjusting ball valve (2) with the pressure gauge; opening a manual adjusting ball valve C (5);
s5: the intelligent anti-condensation device (14) is powered on, and air is supplied to the closed bus (19) through the intelligent anti-condensation device (14). When the pressure of the closed bus (19) reaches 500Pa, the intelligent anti-condensation device (14) automatically stops and automatically starts after the pressure is lower than 300 Pa;
in the S5, the intelligent anti-condensation device (14) generates compressed gas which enters the closed bus through the manual adjusting ball valve C (5), the rubber corrugated outlet pipe (8) and the bleed air pipeline B (12).
5. The combined type closed bus micro-positive pressure maintaining method for the nuclear power plant according to claim 4, characterized in that: in S3, the pressure of the closed bus (19) is maintained between 300Pa and 500 Pa.
6. The combined type closed bus micro-positive pressure maintaining method for the nuclear power plant according to claim 5, characterized in that: in S3, the safety valve (6) jumps and releases pressure when the pressure of the closed bus (19) exceeds 2500 Pa.
7. The combined type closed bus micro-positive pressure maintaining method for the nuclear power plant according to claim 5, characterized in that: a pointer pressure gauge (7) monitors the pressure of the closed bus (19).
8. The combined type closed bus micro-positive pressure maintaining method for the nuclear power plant according to claim 4, characterized in that: in S5, the intelligent anti-condensation device (14) is automatically stopped when the pressure of the closed bus (19) reaches 500Pa, and is automatically started when the pressure is lower than 300 Pa.
9. The combined type closed bus micro-positive pressure maintaining method for the nuclear power plant according to claim 4, characterized in that: in the S5, the intelligent anti-condensation device (14) generates compressed gas which enters the closed bus through the manual adjusting ball valve C (5), the rubber corrugated outlet pipe (8) and the bleed air pipeline B (12).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202010264447.5A CN111682478A (en) | 2020-04-07 | 2020-04-07 | Combined device and method for keeping micro-positive pressure of closed bus for nuclear power plant |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202010264447.5A CN111682478A (en) | 2020-04-07 | 2020-04-07 | Combined device and method for keeping micro-positive pressure of closed bus for nuclear power plant |
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| Publication Number | Publication Date |
|---|---|
| CN111682478A true CN111682478A (en) | 2020-09-18 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN202010264447.5A Pending CN111682478A (en) | 2020-04-07 | 2020-04-07 | Combined device and method for keeping micro-positive pressure of closed bus for nuclear power plant |
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| CN (1) | CN111682478A (en) |
Citations (8)
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|---|---|---|---|---|
| CN201838959U (en) * | 2010-08-20 | 2011-05-18 | 镇江华东电力设备制造厂 | Anti-condensation drying system of isolated-phase enclosed busbar |
| CN202586220U (en) * | 2012-05-09 | 2012-12-05 | 北京电力设备总厂 | Anti-condensation device for enclosed busbar |
| CN203442484U (en) * | 2013-07-05 | 2014-02-19 | 大唐华银电力股份有限公司金竹山火力发电分公司 | Novel generator enclosed busbar micro positive pressure device |
| CN104615169A (en) * | 2014-12-25 | 2015-05-13 | 长江勘测规划设计研究有限责任公司 | Constant low-pressure and continuous air-compensating micro-positive pressure method for isolated-phase closed bus |
| CN208401494U (en) * | 2018-08-06 | 2019-01-18 | 中国神华能源股份有限公司 | System for keeping enclosed busbar to be in slight positive pressure state |
| CN209805357U (en) * | 2019-03-25 | 2019-12-17 | 重庆大唐国际石柱发电有限责任公司 | Double-air-source micro-positive pressure system with hot air maintenance function |
| CN209881345U (en) * | 2019-06-04 | 2019-12-31 | 锡林郭勒职业学院 | Improved generator enclosed bus micro-positive pressure device |
| CN210041245U (en) * | 2019-07-11 | 2020-02-07 | 山西大唐国际临汾热电有限责任公司 | Phase-isolated enclosed bus micro-positive pressure system |
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2020
- 2020-04-07 CN CN202010264447.5A patent/CN111682478A/en active Pending
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN201838959U (en) * | 2010-08-20 | 2011-05-18 | 镇江华东电力设备制造厂 | Anti-condensation drying system of isolated-phase enclosed busbar |
| CN202586220U (en) * | 2012-05-09 | 2012-12-05 | 北京电力设备总厂 | Anti-condensation device for enclosed busbar |
| CN203442484U (en) * | 2013-07-05 | 2014-02-19 | 大唐华银电力股份有限公司金竹山火力发电分公司 | Novel generator enclosed busbar micro positive pressure device |
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| CN208401494U (en) * | 2018-08-06 | 2019-01-18 | 中国神华能源股份有限公司 | System for keeping enclosed busbar to be in slight positive pressure state |
| CN209805357U (en) * | 2019-03-25 | 2019-12-17 | 重庆大唐国际石柱发电有限责任公司 | Double-air-source micro-positive pressure system with hot air maintenance function |
| CN209881345U (en) * | 2019-06-04 | 2019-12-31 | 锡林郭勒职业学院 | Improved generator enclosed bus micro-positive pressure device |
| CN210041245U (en) * | 2019-07-11 | 2020-02-07 | 山西大唐国际临汾热电有限责任公司 | Phase-isolated enclosed bus micro-positive pressure system |
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Application publication date: 20200918 |