CN210805250U - Nuclear power station secondary filter screen core package air tightness test device - Google Patents
Nuclear power station secondary filter screen core package air tightness test device Download PDFInfo
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- CN210805250U CN210805250U CN201921419958.9U CN201921419958U CN210805250U CN 210805250 U CN210805250 U CN 210805250U CN 201921419958 U CN201921419958 U CN 201921419958U CN 210805250 U CN210805250 U CN 210805250U
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- filter screen
- secondary filter
- core package
- nuclear power
- power station
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
- Y02E30/00—Energy generation of nuclear origin
- Y02E30/30—Nuclear fission reactors
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Abstract
A nuclear power station secondary filter screen core bag air tightness test device comprises an air charging device, wherein the air charging device is connected with a first isolation valve through a pipeline and a pipe joint; the first isolation valve is connected with the tool cover through an air inlet pipe; the tool cover is connected to the secondary filter screen cylinder through a bolt; the core bag penetrates through the secondary filter screen cylinder and is supported on the secondary filter screen cylinder; the packing is adopted between the secondary filter screen cylinder and the core bag for sealing to ensure that the medium does not leak when the secondary filter screen operates normally; the packing seal is arranged on the secondary filter screen cylinder by the packing gland; the instrument buffer tube is connected to the tool cover; when the secondary filter screen is disassembled, overhauled and the like, before the input shaft is not reloaded, the air-tight seal test is carried out on the core package of the secondary filter screen, the core package is checked and confirmed to be qualified in sealing performance, the secondary filter screen and the system are prevented from being out of work due to the fact that seawater penetrates into the outer side of the core package after reloading and commissioning, and the system and the unit are guaranteed to operate safely and reliably.
Description
Technical Field
The invention belongs to the field of mechanical maintenance, and particularly relates to a nuclear power station secondary filter screen core package air tightness test device.
Background
The secondary filter screen is important equipment of a seawater circulating system of the nuclear power station, is directly related to whether a downstream condenser can normally operate or not, and directly influences the safety of a cold source of a unit.
The secondary filter screen core package is in the sea water that has the corrosivity, and the inside accurate parts such as secondary filter screen main shaft package, bearing that is provided with of core package, if the core package sealing performance is bad, the sea water infiltration is inside, will lead to parts impaired or secondary filter screen malfunction. In the work such as secondary filter screen disintegration maintenance, need carry out gas tightness test to the core package, whether its leakproofness is qualified to in the equipment operation process, the sea water gets into inside and leads to the part damage.
Therefore, the air tightness test and the air tightness test method for the secondary filter screen core bag with reliable quality and simple operation are developed, and are very important for guaranteeing the overhauling quality of the secondary filter screen, so that the safe and reliable operation of equipment and units is guaranteed.
Disclosure of Invention
The invention aims to: the nuclear power station secondary filter screen core package air tightness test device eliminates the hidden trouble of poor core package sealing performance, improves the secondary filter screen maintenance quality, and ensures the reliable operation of equipment and a system.
The technical scheme of the invention is as follows: a nuclear power station secondary filter screen core bag air tightness test device comprises an air charging device, wherein the air charging device is connected with a first isolation valve through a pipeline and a pipe joint; the first isolation valve is connected with the tool cover through an air inlet pipe;
the tool cover is connected to the secondary filter screen cylinder through a bolt;
the core bag penetrates through the secondary filter screen cylinder and is supported on the secondary filter screen cylinder; the packing is adopted between the secondary filter screen cylinder and the core bag for sealing to ensure that the medium does not leak when the secondary filter screen operates normally;
the packing seal is arranged on the secondary filter screen cylinder by the packing gland;
the instrument buffer tube is connected to the tool cover;
the second isolation valve is connected with the instrument buffer tube through a pipe joint;
the pressure gauge is connected to the second isolation valve through a conversion head.
The first isolating valve is in threaded connection with the air inlet pipe.
The air inlet pipe is connected with the tool cover in a welding mode.
And a sealing ring is used between the tool cover and the secondary filter screen cylinder to ensure that gas does not leak during the gas tightness test.
The packing seal is mounted on the secondary filter screen cylinder by a packing gland through bolts.
The instrument buffer tube is connected to the tool cover through threads.
The invention has the following remarkable effects: when the secondary filter screen is disassembled, overhauled and the like, before the input shaft is not reloaded, the air-tight seal test is carried out on the core package of the secondary filter screen, the core package is checked and confirmed to be qualified in sealing performance, the secondary filter screen and the system are prevented from being out of work due to the fact that seawater penetrates into the outer side of the core package after reloading and commissioning, and the system and the unit are guaranteed to operate safely and reliably.
Drawings
FIG. 1 is a schematic view of a nuclear power plant secondary filter screen core package air tightness test device
In the figure: 1 sealing washer, 2 frock covers, 3 intake pipes, 4 first isolation valves, 5 instrument buffer tubes, 6 second isolation valves, 7 crossover sub, 8 manometer, 9 secondary filter screen barrels, 10 core package gland, 11 packings, 12 core packages, 13 aerating device.
Detailed Description
As shown in fig. 1, the invention provides a device for testing the air tightness of a nuclear power station secondary filter screen core package.
The following detailed description is made with reference to the accompanying drawings and specific embodiments:
the air tightness test device for the secondary filter screen core bag of the nuclear power station comprises an air charging device 13, wherein the air charging device 13 is connected with a first isolation valve 4 through a pipeline and a pipe joint. The first isolation valve 4 and the tool cover 2 are connected through an air inlet pipe 3. Wherein: first isolating valve 4 is threaded connection with the intake pipe, and intake pipe 3 is welded connection with frock cover 2.
The tool cover 2 is connected to the secondary filter screen cylinder body 9 through bolts, and gas does not leak when the sealing ring 1 is used between the tool cover 2 and the secondary filter screen cylinder body 9 to ensure an air-tight test.
The core bag 12 passes through the secondary filter screen cylinder 9 and is supported on the secondary filter screen cylinder 9. And a packing seal 11 is adopted between the secondary filter screen cylinder body 9 and the core package 12 to ensure that a medium does not leak when the secondary filter screen operates normally.
The packing seal 11 is bolted to the secondary screen cylinder 9 by a packing gland 10.
The instrument buffer tube 5 is screwed to the tooling cover 2.
The second isolation valve 6 is connected to the instrument buffer tube 5 by a pipe joint.
The pressure gauge 8 is connected to the second isolation valve 6 by a switching head 7.
The device comprises the following specific use steps:
the first step is as follows: the secondary screen core package 12, packing seal 11 and packing gland 10 installation is completed and the input shaft and drive motor are not installed at this time.
The packing seal 11 is provided with 5 passes of 10 × 10(mm) graphite packing.
The second step is that: install 1 sealing washer 1 between frock cover 2 and secondary filter screen barrel 9, then fasten frock cover 2 to secondary filter screen barrel 9 with the bolt.
The size of the sealing ring 1 is phi 282 multiplied by 220 multiplied by 3, and the material is nitrile rubber or chloroprene rubber.
And thirdly, connecting the instrument buffer tube 5 to the tool cover 2, and then respectively installing a second isolation valve 6, a conversion head 7 and a pressure gauge 8.
The raw material belt can be wound at the joint of the instrument buffer tube 5 and the tool cover 2, the joint of the second isolation valve 6 and the instrument buffer tube 5 and the joint of the pressure gauge 8 and the conversion head 7, or pipe thread sealant is coated, so that the sealing effect is guaranteed.
And fourthly, mounting the first isolation valve 4 on the tool cover 2 through the air inlet pipe 3, and then connecting the air charging device 13 to the first isolation valve 4.
The tool cover 2 and the air inlet pipe 3 can be connected by welding.
The joints of the first isolation valve 4 and the air inlet pipe 3 and the joints of the first isolation valve 4 and the air charging device 13 can be wound with raw material tapes or coated with sealant so as to ensure the sealing effect.
The inflator 13 may employ a pneumatic pump or a compressed gas cylinder.
And fifthly, opening the first isolation valve 4 and the second isolation valve 6 respectively.
And sixthly, observing the reading of the pressure gauge 8, closing the first isolation valve 4 after the test pressure is reached, and starting timing.
Specifically, the test pressure is generally set to 0.2 to 0.3 MPa.g.
And seventhly, checking whether the reading of the pressure gauge 8 is qualified after the time set by the test is reached, and judging whether the air tightness test is qualified according to the reading.
Specifically, the test time was generally set to 15 minutes.
The conditions qualified by the test are as follows: the value of the pressure gauge is reduced by no more than 5% from the time when the test pressure is reached to the time when the test time is exceeded.
When the secondary filter screen is disassembled, overhauled and the like, before the input shaft is not reloaded, the air-tight seal test is carried out on the core package of the secondary filter screen, the core package is checked and confirmed to be qualified in sealing performance, the secondary filter screen and the system are prevented from being out of work due to the fact that seawater penetrates into the outer side of the core package after reloading and commissioning, and the system and the unit are guaranteed to operate safely and reliably.
Claims (6)
1. The utility model provides a nuclear power station secondary filter screen core package air tightness test device which characterized in that: the device comprises an air charging device (13), wherein the air charging device (13) is connected with a first isolation valve (4) through a pipeline and a pipe joint; the first isolating valve (4) is connected with the tool cover (2) through an air inlet pipe (3);
the tool cover (2) is connected to the secondary filter screen cylinder (9) through a bolt;
the core bag (12) penetrates through the secondary filter screen cylinder body (9) and is supported on the secondary filter screen cylinder body (9); a packing seal (11) is adopted between the secondary filter screen cylinder body (9) and the core bag (12) to ensure that the medium does not leak when the secondary filter screen operates normally;
the packing seal (11) is arranged on the secondary filter screen cylinder body (9) by a packing gland (10);
the instrument buffer tube (5) is connected to the tool cover (2);
the second isolation valve (6) is connected with the instrument buffer tube (5) through a pipe joint;
the pressure gauge (8) is connected to the second isolation valve (6) through a conversion head (7).
2. The airtightness test device for the nuclear power station secondary filter screen core package according to claim 1, wherein: the first isolating valve (4) is in threaded connection with the air inlet pipe.
3. The airtightness test device for the nuclear power station secondary filter screen core package according to claim 1, wherein: the air inlet pipe (3) is connected with the tool cover (2) in a welding mode.
4. The airtightness test device for the nuclear power station secondary filter screen core package according to claim 1, wherein: and a sealing ring (1) is used between the tool cover (2) and the secondary filter screen cylinder (9) to ensure that gas does not leak during the gas tightness test.
5. The airtightness test device for the nuclear power station secondary filter screen core package according to claim 1, wherein: the packing seal (11) is mounted on the secondary filter screen cylinder (9) by a packing gland (10) through bolts.
6. The airtightness test device for the nuclear power station secondary filter screen core package according to claim 1, wherein: the instrument buffer tube (5) is connected to the tool cover (2) through threads.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201921419958.9U CN210805250U (en) | 2019-08-29 | 2019-08-29 | Nuclear power station secondary filter screen core package air tightness test device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201921419958.9U CN210805250U (en) | 2019-08-29 | 2019-08-29 | Nuclear power station secondary filter screen core package air tightness test device |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN210805250U true CN210805250U (en) | 2020-06-19 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201921419958.9U Active CN210805250U (en) | 2019-08-29 | 2019-08-29 | Nuclear power station secondary filter screen core package air tightness test device |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN210805250U (en) |
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2019
- 2019-08-29 CN CN201921419958.9U patent/CN210805250U/en active Active
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