CN116241741A - Adjustable pressure-bearing blind flange structure for nuclear power station valve or pipeline pressurizing test - Google Patents

Adjustable pressure-bearing blind flange structure for nuclear power station valve or pipeline pressurizing test Download PDF

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Publication number
CN116241741A
CN116241741A CN202111490793.6A CN202111490793A CN116241741A CN 116241741 A CN116241741 A CN 116241741A CN 202111490793 A CN202111490793 A CN 202111490793A CN 116241741 A CN116241741 A CN 116241741A
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CN
China
Prior art keywords
pressure
pipeline
valve
bearing blind
nuclear power
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Pending
Application number
CN202111490793.6A
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Chinese (zh)
Inventor
曹晓伟
陈昌盛
马新春
陈刚
王磊
王保辉
郭金龙
刘涛
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China Power Maintenance Engineering Co ltd
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China Power Maintenance Engineering Co ltd
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Application filed by China Power Maintenance Engineering Co ltd filed Critical China Power Maintenance Engineering Co ltd
Priority to CN202111490793.6A priority Critical patent/CN116241741A/en
Publication of CN116241741A publication Critical patent/CN116241741A/en
Pending legal-status Critical Current

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    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
    • F16L—PIPES; JOINTS OR FITTINGS FOR PIPES; SUPPORTS FOR PIPES, CABLES OR PROTECTIVE TUBING; MEANS FOR THERMAL INSULATION IN GENERAL
    • F16L55/00—Devices or appurtenances for use in, or in connection with, pipes or pipe systems
    • F16L55/10—Means for stopping flow from or in pipes or hoses
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
    • F16L—PIPES; JOINTS OR FITTINGS FOR PIPES; SUPPORTS FOR PIPES, CABLES OR PROTECTIVE TUBING; MEANS FOR THERMAL INSULATION IN GENERAL
    • F16L23/00—Flanged joints
    • F16L23/006—Attachments
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
    • F16L—PIPES; JOINTS OR FITTINGS FOR PIPES; SUPPORTS FOR PIPES, CABLES OR PROTECTIVE TUBING; MEANS FOR THERMAL INSULATION IN GENERAL
    • F16L23/00—Flanged joints
    • F16L23/16—Flanged joints characterised by the sealing means
    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
    • G01N3/00—Investigating strength properties of solid materials by application of mechanical stress
    • G01N3/08—Investigating strength properties of solid materials by application of mechanical stress by applying steady tensile or compressive forces
    • G01N3/10—Investigating strength properties of solid materials by application of mechanical stress by applying steady tensile or compressive forces generated by pneumatic or hydraulic pressure
    • G01N3/12—Pressure testing
    • 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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  • Engineering & Computer Science (AREA)
  • General Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Physics & Mathematics (AREA)
  • Health & Medical Sciences (AREA)
  • Life Sciences & Earth Sciences (AREA)
  • Chemical & Material Sciences (AREA)
  • Analytical Chemistry (AREA)
  • Biochemistry (AREA)
  • General Health & Medical Sciences (AREA)
  • General Physics & Mathematics (AREA)
  • Immunology (AREA)
  • Pathology (AREA)
  • Monitoring And Testing Of Nuclear Reactors (AREA)

Abstract

The invention relates to an adjustable pressure-bearing blind plate flange structure for a valve or pipeline pressurizing test of a nuclear power station, which comprises a pressure-bearing blind plate and a pressing plate, wherein the pressure-bearing blind plate is provided with a strip-shaped bolt groove, the pressure-bearing blind plate is connected to a flange of the valve or pipeline to be pressurized test through a fastening bolt and a fastening nut, the pressing plate is positioned between the pressure-bearing blind plate and the flange, and the pressing plate is sealed with the valve or pipeline to be pressurized test. Compared with the prior art, when the adjustable pressure-bearing blind flange structure for the nuclear power station valve or pipeline pressure test is used for field installation, the processing time of the pressure-bearing blind flange can be reduced, the working efficiency is improved, and the overhaul quality of field equipment is improved. Meanwhile, the adjustable pressure-bearing blind flange structure for the nuclear power station valve or pipeline pressure test has the characteristics of convenience in use, high flexibility, high reliability and the like.

Description

Adjustable pressure-bearing blind flange structure for nuclear power station valve or pipeline pressurizing test
Technical Field
The invention belongs to the technical field of nuclear power station maintenance, and particularly relates to an adjustable pressure-bearing blind flange structure for a nuclear power station valve or pipeline pressurizing test.
Background
The system equipment of the nuclear power station mostly relates to large-caliber butterfly valves and pipelines, such as CPS and other systems, and the system equipment of the nuclear power station is heavy and complex to maintain. The pressurizing test in the overhaul work is a conventional test work for maintaining various nuclear power station system equipment, is a means for verifying whether the nuclear power station system equipment to be detected meets equipment operation standards, is also the most important link, and is characterized in that when the valve of the nuclear power station system is pressurized in the past in the overhaul process, the size measurement and the processing of each equipment valve are required to be performed, and the pressurizing blind plates are required to be independently processed due to the poor universality, the applicable blind plates of each different equipment valve have overlong machining waiting time, and the processing quantity of the blind plates is increased due to the fact that the valves are more, so that resources are wasted.
Chinese patent CN212482840U discloses a tool and a system of suppressing in situ of nuclear power station butt clamp butterfly valve for suppress in situ of nuclear power station butt clamp butterfly valve, the tool of suppressing includes closure plate side ring flange and evacuation side ring flange, during the use, closure plate side ring flange and evacuation side ring flange press from both sides the butterfly valve clamp in the middle with the nuclear power station butt clamp butterfly valve, the closure plate side ring flange is disk structure, and the outer lane is offered and is used for connecting the bolt hole that the nuclear power station butt clamp butterfly valve, and the centre is offered and is used for connecting the joint screw hole of external double-end external screw joint, evacuation side ring flange is the ring structure, offers the bolt hole that is used for connecting the nuclear power station butt clamp butterfly valve on it. The patent specifically describes how a pressurizing system pressurizes a clamp butterfly valve in a nuclear power plant in situ. However, in the in-situ pressing tool of this patent, the closure plate side flange and the evacuation side flange ring are both to be used for a nuclear power plant butt butterfly valve of a specific size, and if they are to be separately processed for different equipment valves, they are not universal.
Disclosure of Invention
In the prior art, when the pressurizing test is carried out on the valves or pipelines of the nuclear power stations with different specifications, flange structures with different item sizes are required to be respectively configured to connect the valves or pipelines of the nuclear power stations, the flange structures for the test have low universality, and the invention aims to overcome the defects in the prior art and provide the adjustable pressure-bearing blind plate flange structure for the pressurizing test of the valves or pipelines of the nuclear power stations.
The aim of the invention can be achieved by the following technical scheme:
the invention provides an adjustable pressure-bearing blind plate flange structure for a valve or pipeline pressurizing test of a nuclear power station, which comprises a pressure-bearing blind plate and a pressing plate, wherein the pressure-bearing blind plate is provided with a strip-shaped bolt groove, the pressure-bearing blind plate is connected to a flange of the valve or pipeline to be pressurized test through a fastening bolt and a fastening nut, the pressing plate is positioned between the pressure-bearing blind plate and the flange, and the pressing plate is sealed with the valve or pipeline to be pressurized test.
In one embodiment of the invention, the pressure-bearing blind plate is a circular plate, the strip-shaped bolt grooves are formed in the outer ring of the pressure-bearing blind plate, and the strip-shaped bolt grooves are distributed and arranged at intervals on the circumference.
In one embodiment of the present invention, the strip bolt slots are six, and are arranged at intervals on the circumference.
In one embodiment of the invention, the strip bolt groove extends inwards from the outermost side of the pressure-bearing blind plate, and the strip bolt groove is a through groove body.
In one embodiment of the invention, the fastening bolts penetrate through the strip bolt grooves to connect the pressure-bearing blind plate and the flange of the valve or the pipeline to be pressed together, and the fastening nuts are connected to the fastening bolts and are used for fastening the pressure-bearing blind plate, the pressing plate and the flange of the valve or the pipeline to be pressed together to realize sealing between the pressing plate and the valve or the pipeline to be pressed together.
In one embodiment of the invention, the length of the strip bolt slot is 60mm and the width is 30mm.
In one embodiment of the invention, the pressure plate is a complete circular plate.
In one embodiment of the invention, the diameter of the pressure plate is smaller than the diameter of the pressure blind plate.
In one embodiment of the invention, the diameter of the pressing plate is 300mm, and the diameter of the pressure-bearing blind plate is 400mm.
In one embodiment of the invention, a gasket is arranged between the pressure-bearing blind plate and the pressing plate.
In one embodiment of the invention, the pressure-bearing blind plate and the pressure plate are made of No. 20 steel plates.
In one embodiment of the invention, the thickness of the pressure-bearing blind plates and the pressure plates is determined according to the system pressure, and the pressure-bearing blind plates are installed on the flanges of the pipelines or valves through six strip bolt grooves. Because the strip bolt groove is of a strip structure, the position of the fastening bolt in the strip bolt groove can be adjusted.
Because the flange sizes of the on-site pipelines or valves are different, the adjustable pressure-bearing blind plate is not required to be processed according to the size of each pipeline or valve flange, and the structure provided by the invention can be used for the flange bolt hole distance within the range of the strip bolt groove.
The pressure-bearing blind plate can be practically used for the pressure test of the field pipeline or the valve, so that the pressure-bearing blind plate is stable and reliable in effect, is fixed by using a fastening bolt and is connected to the fastening bolt by using a fastening nut, and is used for fastening the pressure-bearing blind plate, the pressure plate and the flange of the valve or the pipeline to be subjected to the pressure test, so that the pressure plate is sealed with the valve or the pipeline to be subjected to the pressure test. When the bolt is used, the center is generally adjusted, and moment fastening is performed symmetrically in batches according to the size of the bolt.
The pressure plate is arranged below the pressure-bearing blind plate, so that the sealing requirement is met, the processing technology is simple and quick, the field requirement is met in actual use, the processing time is saved, and when deviation exists in the process of mapping and machining the pressure plate, the correction can be performed through the strip-shaped bolt grooves, and the field actual use is not influenced.
Compared with the prior art, when the adjustable pressure-bearing blind flange structure for the nuclear power station valve or pipeline pressure test is used for field installation, the processing time of the pressure-bearing blind flange can be reduced, the working efficiency is improved, and the overhaul quality of field equipment is improved. Meanwhile, the adjustable pressure-bearing blind flange structure for the nuclear power station valve or pipeline pressure test has the characteristics of convenience in use, high flexibility, high reliability and the like.
Drawings
FIG. 1 is a schematic diagram of an adjustable pressure-bearing blind flange for a valve or pipeline pressurizing test of a nuclear power plant in embodiment 1;
fig. 2 is a schematic structural diagram of a pressure-bearing blind plate in an adjustable pressure-bearing blind plate flange structure for a valve or pipeline pressurizing test of a nuclear power plant in embodiment 1;
FIG. 3 is a schematic structural view of a platen in an adjustable pressure-bearing blind flange structure for a valve or pipeline pressurization test of a nuclear power plant in example 1;
fig. 4 is a schematic structural diagram of a valve or pipeline pressurization test system in a nuclear power plant in embodiment 1.
Detailed Description
The invention will now be described in detail with reference to the drawings and specific examples.
Examples
Referring to fig. 1, 2, 3 and 4, the embodiment provides an adjustable pressure-bearing blind flange structure for a valve or pipeline pressurizing test of a nuclear power station, which comprises a pressure-bearing blind 1 and a pressing plate 2, wherein a strip-shaped bolt groove 11 is formed in the pressure-bearing blind 1, the pressure-bearing blind 1 is connected to a flange 5 of the valve or pipeline to be pressurizing tested through a fastening bolt 3 and a fastening nut 4, the pressing plate 2 is located between the pressure-bearing blind 1 and the flange 5, and the pressing plate 2 is sealed with the valve or pipeline to be pressurizing tested.
In this embodiment, the pressure-bearing blind plate 1 is a circular plate, the strip-shaped bolt grooves 11 are formed in the outer ring of the pressure-bearing blind plate 1, and the strip-shaped bolt grooves 11 are arranged in six ways and are distributed and arranged at intervals on the circumference. The strip-shaped bolt grooves 11 extend inwards from the outermost side of the pressure-bearing blind plate 1, and the strip-shaped bolt grooves 11 are through grooves. The length of the strip bolt groove 11 is 60mm, and the width is 30mm.
In this embodiment, the fastening bolts 3 penetrate through the strip-shaped bolt grooves 11 to connect the pressure-bearing blind plate 1 with the flange 5 of the valve or the pipeline to be pressurized, and the fastening nuts 4 are connected to the fastening bolts 3 and are used for fastening the pressure-bearing blind plate 1, the pressing plate 2 and the flange 5 of the valve or the pipeline to be pressurized, so that the sealing between the pressing plate 2 and the valve or the pipeline to be pressurized is realized.
In this embodiment, the pressing plate 2 is a complete circular plate. The diameter of the pressing plate 2 is 300mm, and the diameter of the pressure-bearing blind plate 1 is 400mm. The pressure-bearing blind plate 1 and the pressure plate 2 are made of No. 20 steel plates. The thickness of the pressure-bearing blind plate 1 and the pressure plate 2 is determined according to the pressure of the system, and the pressure-bearing blind plate 1 is installed on the flange of the pipeline or the valve through six strip-shaped bolt grooves 11.
The embodiment also provides a nuclear power station valve or pipeline pressurizing test system, which is used for pressurizing a nuclear power station valve or pipeline on site, the pressurizing test system comprises a pressure-bearing blind plate 1, a pressing plate 2, a fastening bolt 3, a fastening nut 4, a flange 5 of the valve or pipeline to be pressurized, a double-head external screw joint 6, a pressurizing pipeline 7 and a pressurizing pump 8, the fastening bolt 3 penetrates through a strip-shaped bolt groove 11, the pressure-bearing blind plate 1 and the flange 5 of the valve or pipeline to be pressurized are connected together, the fastening nut 4 is connected to the fastening bolt 3, and is used for fastening the pressure-bearing blind plate 1, the pressing plate 2 and the flange 5 of the valve or pipeline to be pressurized, so that sealing between the pressing plate 2 and the valve or pipeline to be pressurized is realized. One end of the double-end external thread joint 6 is connected with a valve or a pipeline to be pressurized, the other end of the double-end external thread joint is connected with one end of a pressurized pipeline 7, the other end of the pressurized pipeline 7 is connected with a pressurized pump 8, and a pressure gauge 71 and a needle valve 72 are arranged on the pressurized pipeline 7.
The using method of the system comprises the following steps: after the needle valve 72 is opened and the pressurizing pump 8 is started, the readings of the pressure gauge 71 and the leakage condition of the flanges of all joints are observed, if the leakage condition exists, the leakage condition is treated in time, after the readings of the pressure gauge 71 meet the requirement, the needle valve 72 is closed for pressure maintaining, the pressure drop and the water seepage condition of an outlet are observed, and whether the valve or the pipeline of the nuclear power station to be tested is qualified is judged. After the work is finished, the pressure is emptied, the fastening bolts are disassembled after the fact that no residual pressure exists in the interior is confirmed, and the pressure-bearing blind plate 1 and the pressure plate 2 are disassembled.
Preferably, the double-end external thread joint is wound with a raw material belt and then connected with a valve or a pipeline to be subjected to a compression test. Preferably, the pressurized pipe 7 is a hose. Preferably, the pressurizing pump 8 is a manual pressurizing pump.
In this embodiment, since the strip-shaped bolt groove 11 has a strip-shaped structure, the position of the fastening bolt 3 in the strip-shaped bolt groove 11 can be adjusted.
Because the flange sizes of the on-site pipelines or valves are different, the adjustable pressure-bearing blind plates are not required to be processed according to the size of each pipeline or valve flange, and the structures provided by the invention can be used when the hole pitch of the flange bolts meets the range of the strip bolt grooves 11.
The pressure-bearing blind plate can be practically used for the pressure test of a field pipeline or valve, so that the pressure-bearing blind plate is stable and reliable in effect, is fixed by using the fastening bolts 3, is connected to the fastening bolts 3 by using the fastening nuts 4, and is used for fastening the pressure-bearing blind plate 1, the pressure plate 2 and the flange 5 of the valve or pipeline to be tested in the pressure test, so that the pressure plate 2 is sealed with the valve or pipeline to be tested in the pressure test. When the bolt is used, the center is generally adjusted, and moment fastening is performed symmetrically in batches according to the size of the bolt.
In this embodiment, the pressing plate 2 is installed under the pressure-bearing blind plate 1, so that the sealing requirement is met, the processing technology is simple and quick, the field requirement is met and the processing time can be saved in actual use, and when deviation exists in the mapping and machining processes of the pressing plate 2, the correction can be performed through the strip-shaped bolt grooves 11, so that the field actual use is not affected.
In the embodiment, when the adjustable pressure-bearing blind flange structure for the nuclear power station valve or pipeline pressure test is used for field installation, the processing time of the pressure-bearing blind flange can be reduced, the working efficiency is improved, and the overhaul quality of field equipment is improved. Meanwhile, the adjustable pressure-bearing blind flange structure for the nuclear power station valve or pipeline pressure test has the characteristics of convenience in use, high flexibility, high reliability and the like.
The previous description of the embodiments is provided to facilitate a person of ordinary skill in the art in order to make and use the present invention. It will be apparent to those skilled in the art that various modifications can be readily made to these embodiments and the generic principles described herein may be applied to other embodiments without the use of the inventive faculty. Therefore, the present invention is not limited to the above-described embodiments, and those skilled in the art, based on the present disclosure, should make improvements and modifications without departing from the scope of the present invention.

Claims (10)

1. The utility model provides a pressure-bearing blind flange structure with adjustable nuclear power station valve or pipeline are beaten pressure test, its characterized in that includes pressure-bearing blind (1) and clamp plate (2) set up strip bolt groove (11) on pressure-bearing blind (1), pressure-bearing blind (1) are used for connecting on the flange (5) of waiting to beat pressure test valve or pipeline through fastening bolt (3) and fastening nut (4), clamp plate (2) are located between pressure-bearing blind (1) and flange (5), just seal between clamp plate (2) and the valve or the pipeline of waiting to beat pressure test.
2. The adjustable pressure-bearing blind plate flange structure for the nuclear power station valve or pipeline pressure test according to claim 1 is characterized in that the pressure-bearing blind plate (1) is a circular plate, the strip-shaped bolt grooves (11) are formed in the outer ring of the pressure-bearing blind plate (1), and the strip-shaped bolt grooves (11) are distributed and arranged at intervals on the circumference.
3. An adjustable pressure-bearing blind flange structure for a valve or pipeline pressurizing test of a nuclear power station according to claim 2, wherein six strip-shaped bolt grooves (11) are arranged and distributed at intervals on the circumference.
4. An adjustable pressure-bearing blind flange structure for a valve or pipeline pressurizing test of a nuclear power station according to claim 1, wherein the strip-shaped bolt groove (11) extends inwards from the outermost side of the pressure-bearing blind flange (1), and the strip-shaped bolt groove (11) is a through groove body.
5. An adjustable pressure-bearing blind flange structure for a valve or pipeline in a nuclear power station according to claim 1, wherein the fastening bolts (3) penetrate through the strip-shaped bolt grooves (11) to connect the pressure-bearing blind (1) with the flange (5) of the valve or pipeline to be pressurized, and the fastening nuts (4) are connected to the fastening bolts (3) and are used for fastening the pressure-bearing blind (1), the pressing plate (2) and the flange (5) of the valve or pipeline to be pressurized, so that sealing between the pressing plate (2) and the valve or pipeline to be pressurized is achieved.
6. An adjustable pressure-bearing blind flange structure for a valve or pipeline pressurizing test of a nuclear power station according to claim 1, wherein the length of the strip-shaped bolt groove (11) is 60mm, and the width is 30mm.
7. An adjustable pressure-bearing blind flange structure for a valve or pipeline pressurizing test of a nuclear power station according to claim 1, wherein the pressure plate (2) is a complete circular plate.
8. An adjustable pressure-bearing blind flange structure for a nuclear power station valve or pipeline pressure test according to claim 1, wherein the diameter of the pressure plate (2) is smaller than the diameter of the pressure-bearing blind (1).
9. An adjustable pressure-bearing blind flange structure for a nuclear power station valve or pipeline pressure test according to claim 1, wherein the diameter of the pressure plate (2) is 300mm, and the diameter of the pressure-bearing blind (1) is 400mm.
10. The adjustable pressure-bearing blind flange structure for the nuclear power station valve or pipeline pressure test according to claim 1 is characterized in that a gasket is arranged between the pressure-bearing blind (1) and the pressing plate (2).
CN202111490793.6A 2021-12-08 2021-12-08 Adjustable pressure-bearing blind flange structure for nuclear power station valve or pipeline pressurizing test Pending CN116241741A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
CN202111490793.6A CN116241741A (en) 2021-12-08 2021-12-08 Adjustable pressure-bearing blind flange structure for nuclear power station valve or pipeline pressurizing test

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
CN202111490793.6A CN116241741A (en) 2021-12-08 2021-12-08 Adjustable pressure-bearing blind flange structure for nuclear power station valve or pipeline pressurizing test

Publications (1)

Publication Number Publication Date
CN116241741A true CN116241741A (en) 2023-06-09

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Family Applications (1)

Application Number Title Priority Date Filing Date
CN202111490793.6A Pending CN116241741A (en) 2021-12-08 2021-12-08 Adjustable pressure-bearing blind flange structure for nuclear power station valve or pipeline pressurizing test

Country Status (1)

Country Link
CN (1) CN116241741A (en)

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