CN220337053U - Device for monitoring low-pressure leakage flow of main pump of nuclear power plant - Google Patents
Device for monitoring low-pressure leakage flow of main pump of nuclear power plant Download PDFInfo
- Publication number
- CN220337053U CN220337053U CN202321538253.5U CN202321538253U CN220337053U CN 220337053 U CN220337053 U CN 220337053U CN 202321538253 U CN202321538253 U CN 202321538253U CN 220337053 U CN220337053 U CN 220337053U
- Authority
- CN
- China
- Prior art keywords
- main pump
- power plant
- nuclear power
- leakage flow
- low pressure
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
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Links
- 238000012544 monitoring process Methods 0.000 title claims abstract description 24
- 238000007789 sealing Methods 0.000 claims abstract description 17
- 239000000463 material Substances 0.000 claims description 7
- 238000003466 welding Methods 0.000 claims description 6
- 239000005388 borosilicate glass Substances 0.000 claims description 3
- 238000012806 monitoring device Methods 0.000 description 18
- 239000007788 liquid Substances 0.000 description 3
- 229920002943 EPDM rubber Polymers 0.000 description 2
- 230000000694 effects Effects 0.000 description 2
- 230000000007 visual effect Effects 0.000 description 2
- 230000009286 beneficial effect Effects 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 239000011521 glass Substances 0.000 description 1
- 238000009434 installation Methods 0.000 description 1
- 238000003754 machining Methods 0.000 description 1
- 238000010791 quenching Methods 0.000 description 1
- 230000000171 quenching effect Effects 0.000 description 1
- 230000009466 transformation Effects 0.000 description 1
- 238000012795 verification Methods 0.000 description 1
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 1
Classifications
-
- 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
Abstract
The utility model belongs to the technical field of nuclear energy machinery, and particularly relates to a device for monitoring low-pressure leakage flow of a main pump of a nuclear power plant. The device is arranged on a low-pressure sealing leakage pipeline of each main pump, is a square pipe with transparent windows and scales, is connected with a bypass overflow pipeline on the side surface of the square pipe, and is provided with a diaphragm valve respectively at the front and the rear of the square pipe. The low-pressure sealing leakage flow monitoring of the main pump is realized by permanently installing the modified flow on the low-pressure sealing leakage pipeline of the main pump.
Description
Technical Field
The utility model belongs to the technical field of nuclear energy machinery, and particularly relates to a device for monitoring low-pressure leakage flow of a main pump of a nuclear power plant.
Background
The main pump of the nuclear power plant has more sealing faults, and the general phenomenon of the faults is that the leakage flow of the low-pressure sealing of the main pump is increased. The low-pressure leakage pipeline of the main pump is the inter-stage leakage of the 3 rd-stage seal of the main pump, and the leakage flow is an important parameter for feeding back the running state of the main pump seal. Currently, the low pressure seal leakage line of the main pump lacks a proper monitoring device, so that a device needs to be added to the low pressure seal leakage line of the main pump to monitor the low pressure leakage flow condition of each main pump.
Disclosure of Invention
The utility model aims to provide a device for monitoring the low-pressure leakage flow of a main pump of a nuclear power plant, which is used for realizing the monitoring of the low-pressure leakage flow of the main pump by permanently installing a modified flow on a low-pressure sealing leakage pipeline of the main pump.
In order to achieve the above purpose, the technical scheme adopted by the utility model is as follows:
a device for monitoring low-pressure leakage flow of a main pump of a nuclear power plant is arranged on a low-pressure sealing leakage pipeline of each main pump, is a square pipe with transparent windows and scales, is connected with a bypass overflow pipeline on the side face of the square pipe, and is provided with a diaphragm valve at the front and rear sides of the square pipe.
The diaphragm valve mounting position is the containment ring gallery position on the main pump low pressure seal leakage pipeline.
Square tube specification is DN80, and the material is 316L.
The diaphragm valve specification is DN50, and the material is 316L.
The window is toughened borosilicate glass, and the quantity is 4.
The bypass overflow line is 316L.
The bypass overflow pipeline is connected with the square pipe by socket welding.
Bypass overflow line gauge is 13.7mm x 1.65mm.
Square tube size is 133mm 113mm 240mm.
The square pipe is arranged on a low-pressure sealing leakage pipeline of each main pump through bolts, gaskets and gaskets.
The beneficial effects obtained by the utility model are as follows:
after the flow monitoring device is installed, the leakage flow of the low-pressure seal of the main pump can be monitored to judge whether the main pump seal is normal or not, and the device has great effect on diagnosing and positioning faults of the main pump seal. The utility model has good effect, solves the problem of flow monitoring, and has no potential hidden trouble. The main pump low-pressure sealing leakage flow is large and small, possibly not a water entity, the existing flowmeter cannot monitor the flow, and the flow monitoring can be realized through the flow monitoring device.
Drawings
FIG. 1 is a detailed view of an apparatus for monitoring low pressure leakage flow of a main pump of a nuclear power plant;
FIG. 2 is a schematic flow diagram of an apparatus for monitoring low pressure leakage flow of a main pump of a nuclear power plant;
FIG. 3 is an enlarged view in the direction A;
FIG. 4 is an enlarged view in the B direction;
in the figure: 1. square tube, 2, window, 3, bolt, washer and gasket.
Detailed Description
The utility model will now be described in detail with reference to the drawings and specific examples.
The processing flow monitoring device is arranged on the low-pressure sealing leakage pipeline of each main pump in a machining mode, a diaphragm valve is respectively arranged in front of and behind the processing flow monitoring device, and the installation position is the position of a containment ring gallery on the low-pressure sealing leakage pipeline of the main pump so as to be convenient for monitoring. The main body of the flow monitoring device is a square tube with a transparent window and a DN80 scale, the side surface of the main body is connected with a bypass overflow pipeline, and the top and the bottom of the main body are connected with valves (for convenience in description, the valve numbers are 888VP and 889 VP) of the main pump low-pressure sealing leakage main pipe.
The set of flow monitoring device comprises three parts, namely a front diaphragm valve, a rear diaphragm valve, a flow monitoring device and a bypass pipeline, and the specific structure comprises: the diaphragm valve is DN50, is 316L in material and is rigidly connected with the pipeline in a butt welding mode. Flow monitoring device, body 316l,133 x 113 x 240mm; the visual window is toughened borosilicate glass (the glass must be tempered after quenching), and the number of the visual window is 4; ethylene propylene diene monomer rubber is used for the sealing gasket, and the number of the ethylene propylene diene monomer rubber is 4; bolt material 316, specification M5, 16 in number; bolt spring washers 316, M5, 16 in number; the joint on the equipment is connected with the pipeline by socket welding; and the bypass pipeline is 13.7x1.65mm in specification, is 316L in material, and is connected with the flow monitoring device by socket welding.
To the unable monitoring problem of main pump low pressure seal leakage flow, nuclear power plant accessible transformation's mode is installed, installs the containment ring corridor position on the low pressure seal leakage pipeline of main pump, and specific step is as follows: 1) Purchasing a valve, a flow monitoring device and a pipeline; 2) Cutting the pipeline and welding front and rear diaphragm valves; 3) Installing a flow monitoring device; 4) Installing a bypass pipeline; 5) And (5) verification. The low-pressure sealing leakage flow monitoring device of the main pump is considered in the prior design, and the device is installed in the engineering stage according to the mode.
When the leakage flow of the low-pressure seal of the main pump needs to be monitored qualitatively, the change of the leakage flow can be observed visually through the transparent window. When it is desired to quantitatively monitor the low pressure seal leakage flow of the main pump, valve 889VP is closed. At this time, the leakage of the low-pressure seal of the main pump is accumulated in the flow monitoring device, the time is started from the 0 liquid level, the operator needs to start timing, and the timing is stopped after the operator reaches a certain scale. Because the scale marks the accumulated liquid volume in the flow monitoring device, the low-pressure sealing leakage flow of the main pump can be obtained only by simple operation. In order to prevent the problem of full pipe of the flow monitoring device, which may be caused before the valve 889VP is opened again, a bypass pipeline is arranged on the side surface of the flow monitoring device and is connected to the downstream of the 889VP pipeline, so that the problem that the liquid in the monitoring device cannot be discharged due to operation delay or excessive flow can be prevented.
Claims (10)
1. A device for monitoring low pressure leakage flow of main pump of nuclear power plant, its characterized in that: the device is arranged on a low-pressure sealing leakage pipeline of each main pump, is a square pipe with transparent windows and scales, is connected with a bypass overflow pipeline on the side surface of the square pipe, and is provided with a diaphragm valve respectively at the front and the rear of the square pipe.
2. The apparatus for monitoring low pressure leakage flow rate of a main pump of a nuclear power plant according to claim 1, wherein: the diaphragm valve mounting position is the containment ring gallery position on the main pump low pressure seal leakage pipeline.
3. The apparatus for monitoring low pressure leakage flow rate of a main pump of a nuclear power plant according to claim 1, wherein: square tube specification is DN80, and the material is 316L.
4. The apparatus for monitoring low pressure leakage flow rate of a main pump of a nuclear power plant according to claim 1, wherein: the diaphragm valve specification is DN50, and the material is 316L.
5. The apparatus for monitoring low pressure leakage flow rate of a main pump of a nuclear power plant according to claim 1, wherein: the window is toughened borosilicate glass, and the quantity is 4.
6. The apparatus for monitoring low pressure leakage flow rate of a main pump of a nuclear power plant according to claim 1, wherein: the bypass overflow line is 316L.
7. The apparatus for monitoring low pressure leakage flow rate of a main pump of a nuclear power plant according to claim 1, wherein: the bypass overflow pipeline is connected with the square pipe by socket welding.
8. The apparatus for monitoring low pressure leakage flow rate of a main pump of a nuclear power plant according to claim 1, wherein: bypass overflow line gauge is 13.7mm x 1.65mm.
9. The apparatus for monitoring low pressure leakage flow rate of a main pump of a nuclear power plant according to claim 1, wherein: square tube size is 133mm 113mm 240mm.
10. The apparatus for monitoring low pressure leakage flow rate of a main pump of a nuclear power plant according to claim 1, wherein: the square pipe is arranged on a low-pressure sealing leakage pipeline of each main pump through bolts, gaskets and gaskets.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202321538253.5U CN220337053U (en) | 2023-06-16 | 2023-06-16 | Device for monitoring low-pressure leakage flow of main pump of nuclear power plant |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202321538253.5U CN220337053U (en) | 2023-06-16 | 2023-06-16 | Device for monitoring low-pressure leakage flow of main pump of nuclear power plant |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN220337053U true CN220337053U (en) | 2024-01-12 |
Family
ID=89451350
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202321538253.5U Active CN220337053U (en) | 2023-06-16 | 2023-06-16 | Device for monitoring low-pressure leakage flow of main pump of nuclear power plant |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN220337053U (en) |
-
2023
- 2023-06-16 CN CN202321538253.5U patent/CN220337053U/en active Active
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