CN216955026U - Explosion-proof pressure relief device for vacuum pipeline - Google Patents
Explosion-proof pressure relief device for vacuum pipeline Download PDFInfo
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- CN216955026U CN216955026U CN202220595399.2U CN202220595399U CN216955026U CN 216955026 U CN216955026 U CN 216955026U CN 202220595399 U CN202220595399 U CN 202220595399U CN 216955026 U CN216955026 U CN 216955026U
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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
Abstract
The utility model provides an explosion-proof pressure relief device for on vacuum pipe, it is including vacuum box, vacuum pipe, pipeline flange, sealing washer, and the technical essential is: a spring type pressure relief device and a corrugated pipe type pressure relief device are arranged in the pipeline; the spring type pressure relief device is connected to the upper end of the pipeline, and a connecting pipe flange is welded to the upper end of the pipeline and connected with the connecting pipe flange; bellows formula pressure relief device connects at the vacuum pipe end, and the device lower extreme links to each other with vacuum pipe end flange, and end flange is equipped with two seal grooves and links to each other with sealed lid and flange intra-annular terminal surface, and the centre respectively accompanies the sealing washer, and flange and end flange outer terminal surface pass through vacuum buckle locking, and the branch pipe is equipped with to flange ring upper end, and the branch pipe has the exhaust hole on four sides, and the upper cover flange is equipped with to the branch pipe upper end, and the upper cover flange links to each other with precision instruments end pipe flange, has welded the bellows in the middle of upper cover flange and the sealed lid. The utility model has smart and novel structure, can effectively complete the pressure relief work after pressurization, meets the use requirements, and is safe and reliable.
Description
Technical Field
The utility model relates to the technical field of leakage detection of electrical equipment, in particular to an explosion-proof pressure relief device for a vacuum pipeline.
Background
A gas insulated totally-enclosed combined electrical apparatus (GIS) is an important component of high-voltage transmission equipment, and in order to insulate and extinguish arc when the GIS is in operation, SF6 gas with certain pressure is filled in an equipment pipeline, and a metal corrugated compensator is adopted to absorb stress and displacement of the pipeline caused by temperature or mechanical vibration; therefore, the metal corrugated compensator on the pipeline is easy to leak, and once the metal corrugated compensator leaks, the normal operation of the combined electrical appliance is influenced, and even accidents are caused. The leakage rate of the medium gas (SF 6) per year is less than 0.5 percent of the volume specified in GB/T30092-2013 metal corrugated pipe compensator for high-voltage combined electrical equipment, and the leakage rate is 10 after conversion-6Pa.m3Below the order of magnitude of/s, GIS can be seen to have a high requirement for the gas tightness of the compensator. Domestic use of SF6Gas sniffing for gas tightness of compensatorsThe sexual test, written in chapter thirteen of the handbook of vacuum design (third edition), has a detection precision of 10- 7Pa.m3S; the method has the characteristics of low detection cost, strong working condition identity and the like, and can be widely used in the power industry, but the method also has the defects of low detection efficiency, great environmental influence, greenhouse gas and the like; therefore, in recent years, another detection method, namely a pressure helium leak detection method, is gradually rising in China, and has the advantages of environmental protection and high precision (10)-9~10-14Pa.m3And/s), high efficiency and the like, and the helium leak detection is required to verify the air tightness of the product in European Union GIS products exported in China, foreign GIS enterprises and products for gas insulated metal enclosed transmission lines (GILs) in China.
In 13-46 in the manual of vacuum design manual, this method is implemented by a vacuum detection system composed of a vacuum pipe connecting a vacuum box, a pump set, a helium mass spectrometer leak detector and a control panel, i.e. a vacuum box type helium mass spectrometer leak detection system, in which the helium mass spectrometer leak detector is the core of the system and the cost is the highest. In a leak detection test, a workpiece is placed in a vacuum box body, helium is filled in the vacuum box body to be positive pressure, the outside of the vacuum box body is in a vacuum environment, and a pump set continuously pumps gas in the vacuum box body to a helium mass spectrometer leak detector to measure helium flow in the helium mass spectrometer leak detector so as to judge whether leakage exists. During the test, because the work piece is inside to be the malleation, when taking place unusually, for example the frock is invalid, product quality is bad, equipment is unusual to cause transshipping etc, all there is the work piece that causes and releases pressure in the twinkling of an eye, the risk of explosion in the box, cause the incasement to produce higher atmospheric pressure in the twinkling of an eye, and the vacuum tube that present vacuum box and helium mass spectrometer are connected does not possess explosion-proof pressure release function, the air current can directly impact helium mass spectrometer leak detector through the pipeline, cause the damage of whole detecting system, endanger life and property safety, it is therefore obvious, in GIS metal ripple compensator carries out pressure helium leak detection method test, it is very necessary that the device possesses explosion-proof pressure release function on the vacuum tube.
SUMMERY OF THE UTILITY MODEL
The utility model aims to provide an explosion-proof pressure relief device for a vacuum pipeline, which aims to solve the problems in the background technology, so that the impact of gas on a helium mass spectrometer leak detector is well relieved, and the aims of protecting personnel and property are fulfilled.
In order to achieve the purpose, the utility model provides the following technical scheme:
the utility model provides an explosion-proof pressure relief device for on vacuum pipe, it is including vacuum box, vacuum pipe, pipeline flange, sealing washer, vacuum pipe one end even to the vacuum box, and the other end even to precision instrument, its characterized in that: two pressure relief devices, namely a spring type pressure relief device and a corrugated pipe type pressure relief device, are arranged in the pipeline; the spring type pressure relief device is connected to the upper end of the pipeline, a pipe connecting flange is welded to the upper end of the pipeline and connected with the pipe connecting flange, the pipe connecting flange is provided with double sealing grooves and connected with the sealing cover and the inner end face of the connecting flange ring, an O-shaped sealing ring is clamped between the double sealing grooves and connected with the sealing cover and the inner end face of the connecting flange ring, the outer end faces of the connecting flange and the pipe connecting flange are locked through a vacuum buckle, a branch pipe is arranged at the upper end of the connecting flange ring, exhaust holes are formed in four sides of the branch pipe, an upper cover plate is arranged at the upper end of the branch pipe, and a spring is arranged between the upper cover plate and the sealing cover; bellows formula pressure relief device connects at the vacuum pipe end, and the device lower extreme links to each other with vacuum pipe end flange, and the end flange is equipped with two seal grooves and links to each other with sealed lid and flange ring inner end face, and the middle O type sealing washer that has clamped respectively, and flange and end flange outer terminal surface are through vacuum buckle locking, and the branch pipe is equipped with to flange ring upper end, and the branch pipe has the exhaust hole on four sides, and the upper cover flange is equipped with to the branch pipe upper end, and the upper cover flange links to each other with precision instruments end pipe flange, has welded the bellows in the middle of upper cover flange and the sealed lid.
The utility model also includes: the pipeline flange comprises a device end flange and a box end flange, and an O-shaped sealing ring is clamped and is connected to the vacuum box in a sealed and locked mode through a vacuum buckle.
In the technical scheme of the utility model, the precision instrument is a helium mass spectrometer leak detector.
Compared with the prior art, the utility model has the beneficial effects that: the vacuum pipeline pressure relief device adopts a double automatic pressure relief structure, when equipment normally works, a vacuum pipeline is under negative pressure, and the sealing cover of the pressure relief device has self-sealing property, so that the vacuum degree of the vacuum pipeline is not influenced; when unusual, the vacuum chamber positive pressure gas flow direction helium mass spectrometer end of appearance is gushed into and is strikeed, and spring pressure relief device receives the malleation and bounces, accomplishes first pressure release, and when the interior residual air current of pipeline flowed to the ripple pipe end, the bellows received the malleation, and the sealed lid is lifted to ripples shrink one by one, realizes the second pressure release, provides twice explosion-proof pressure release guarantee, can effectually accomplish the pressure release work after the incasement suddenly carried out the pressure boost, has satisfied operation requirement, safe and reliable.
Drawings
FIG. 1 is a schematic structural diagram of an explosion-proof pressure relief device of a vacuum pipeline;
FIG. 2 is a schematic structural diagram of a spring type pressure relief device in an explosion-proof pressure relief device;
fig. 3 is a schematic structural view of a bellows type pressure relief device in the explosion-proof pressure relief device.
The main labels in the figure illustrate: 1-vacuum box, 2-box end flange, 3-vacuum buckle, 4-O type sealing ring, 5-device end flange, 6-spring type pressure relief device, 7-bellows type pressure relief device, 8-vacuum pipeline, 9-helium mass spectrometer leak detector, 6-1 branch pipe, 6-2-upper cover plate, 6-3-spring, 6-4-sealing cover, 6-5-O type sealing ring, 6-6-connecting pipe flange, 6-7-vacuum buckle, 6-8-connecting flange, 6-9 vent hole, 7-1-instrument end flange, 7-2-upper cover flange, 7-3-bellows, 7-4 sealing cover, 7-5-O type sealing ring, 7-2-vacuum buckle, 4-O type sealing ring, and the like, 7-6-connecting pipe flange, 7-7-vacuum buckle, 7-8-connecting flange, 7-9-branch pipe and 7-10 exhaust hole.
Detailed Description
The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.
Example 1
As shown in fig. 1-3, in the embodiment of the present invention, fig. 1 is a vacuum box, one end of a vacuum pipeline 8 is connected to the vacuum box 1, and the other end is connected to a helium mass spectrometer leak detector 9; the pipeline flange comprises a device end flange 5 and a box end flange 2, an O-shaped sealing ring 4 is clamped in the pipeline flange and is tightly locked and connected to a vacuum box by a vacuum buckle 3, two pressure relief devices, namely a spring type pressure relief device 6 and a corrugated pipe type pressure relief device 7, are arranged in the vacuum pipeline, and 8 in the figure is the vacuum pipeline; one end of a vacuum pipeline 8 is hermetically locked and connected to a vacuum box 1 by a vacuum buckle 3 through a device end flange 5 and a box end flange 2 with an O-shaped sealing ring 4, and the other end of the vacuum pipeline 8 is connected to a helium mass spectrometer leak detector through an instrument end flange 7-1 and an upper cover flange 7-2; a pipe connecting flange 6-6 is welded at the upper end of the vacuum pipeline 8 and is connected with a spring type pressure relief device 6, the pipe connecting flange 6-6 is provided with double sealing grooves which are connected with a sealing cover 6-4 and a connecting flange 6-8, an O-shaped sealing ring 6-5 is clamped in the middle of each pipe connecting flange 6-6, the connecting flange 6-8 and the pipe connecting flange 6-6 are locked by a vacuum buckle 6-7, the upper end of the connecting flange 6-8 is provided with a branch pipe 6-1, the four sides of the branch pipe 6-1 are provided with exhaust holes 6-9, the upper end is provided with an upper cover plate 6-2, and a spring 6-3 is arranged between the upper cover plate 6-2 and the sealing cover 6-4; a connecting pipe flange 7-6 is welded on the vacuum pipeline 8 and is connected with a corrugated pipe type pressure relief device 7, the connecting pipe flange 7-6 is provided with double sealing grooves which are connected with a sealing cover 7-4 and a connecting flange 7-8, an O-shaped sealing ring 7-5 is clamped in the middle of the connecting pipe flange 7-6, the outer end faces of the connecting flange 7-8 and the connecting pipe flange 7-6 are locked through a vacuum buckle 7-7, a branch pipe 7-9 is arranged at the upper end of the connecting flange 7-8, four exhaust holes 7-10 are arranged on the branch pipe 7-9, an upper cover flange 7-2 is arranged at the upper end of the branch pipe 7-9, the upper cover flange 7-2 is connected with an instrument end flange 7-1, and a corrugated pipe 7-3 is welded between the upper cover flange 7-2 and the sealing cover 7-4;
the utility model is applied to a vacuum box type helium mass spectrum leak detection system, and a vacuum pipeline 8, a spring pressure relief device 6 and a corrugated pipe pressure relief device 7 are respectively elastically connected through sealing covers 6-4 and 7-4 to realize sealing in a vacuum detection state. Through the design of the spring pressure relief device 6, when abnormal air pressure in the vacuum box rises, air flow rushes into the vacuum pipeline 8 to enable the air pressure in the pipeline to rise, the sealing cover 6-4 of the spring pressure relief device 6 is jacked up by the pressure and is communicated with the atmosphere through the exhaust hole 6-9 of the branch pipe 6-1 to enable the pressure in the vacuum pipeline 8 to be released, when residual air flow passes through the corrugated pipe pressure relief device 7, the corrugated pipe 7-3 is compressed and contracted to enable the sealing cover 7-4 to move upwards and is communicated with the atmosphere through the exhaust hole 7-10 of the branch pipe 7-9 to achieve pressure relief work, the helium mass spectrometer leak detector 9 connected with the vacuum pipeline 8 is protected doubly, and the helium mass spectrometer leak detector is connected with the vacuum pipeline 8 through the upper cover plate 6-2, the sealing cover 6-4, the spring 6-3 and the upper cover flange 7-2 of the corrugated pipe pressure relief device 7, The sealing cover 7-4 and the corrugated pipe 7-3 are designed to realize the functions of limiting, buffering and pressure relief, ensure the safety of the pressure relief device, effectively complete the pressure relief work after pressurization, can be repeatedly used, meet the use requirements, and are safe and reliable.
It will be evident to those skilled in the art that the utility model is not limited to the details of the foregoing illustrative embodiments, and that the present invention may be embodied in other specific forms without departing from the spirit or essential attributes thereof. The present embodiments are therefore to be considered in all respects as illustrative and not restrictive, the scope of the utility model being indicated by the appended claims rather than by the foregoing description, and all changes which come within the meaning and range of equivalency of the claims are therefore intended to be embraced therein. Any reference sign in a claim should not be construed as limiting the claim concerned.
Furthermore, it should be understood that although the present description refers to embodiments, not every embodiment may contain only a single embodiment, and such description is for clarity only, and those skilled in the art should integrate the description, and the embodiments may be combined as appropriate to form other embodiments understood by those skilled in the art.
Claims (3)
1. The utility model provides an explosion-proof pressure relief device for on vacuum pipe, it is including vacuum box, vacuum pipe, pipeline flange, sealing washer, vacuum pipe one end even to the vacuum box, and the other end even to precision instrument, its characterized in that: two pressure relief devices, namely a spring type pressure relief device and a corrugated pipe type pressure relief device, are arranged in the pipeline; the spring type pressure relief device is connected to the upper end of the pipeline, a pipe connecting flange is welded to the upper end of the pipeline and connected with the pipe connecting flange, the pipe connecting flange is provided with double sealing grooves and connected with the sealing cover and the inner end face of the connecting flange ring, an O-shaped sealing ring is clamped between the double sealing grooves and connected with the sealing cover and the inner end face of the connecting flange ring, the outer end faces of the connecting flange and the pipe connecting flange are locked through a vacuum buckle, a branch pipe is arranged at the upper end of the connecting flange ring, exhaust holes are formed in four sides of the branch pipe, an upper cover plate is arranged at the upper end of the branch pipe, and a spring is arranged between the upper cover plate and the sealing cover; bellows formula pressure relief device connects at the vacuum pipe end, and the device lower extreme links to each other with vacuum pipe end flange, and the end flange is equipped with two seal grooves and links to each other with sealed lid and flange ring inner end face, and the middle O type sealing washer that has clamped respectively, and flange and end flange outer terminal surface are through vacuum buckle locking, and the branch pipe is equipped with to flange ring upper end, and the branch pipe has the exhaust hole on four sides, and the upper cover flange is equipped with to the branch pipe upper end, and the upper cover flange links to each other with precision instruments end pipe flange, has welded the bellows in the middle of upper cover flange and the sealed lid.
2. The explosion-proof pressure relief device for the vacuum pipeline of claim 1, wherein: the pipeline flange comprises a device end flange and a box end flange, and an O-shaped sealing ring is clamped and is connected to the vacuum box in a sealed and locked mode through a vacuum buckle.
3. The explosion-proof pressure relief device for the vacuum pipeline of claim 1, wherein: the precision instrument is a helium mass spectrometer leak detector.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202220595399.2U CN216955026U (en) | 2022-03-18 | 2022-03-18 | Explosion-proof pressure relief device for vacuum pipeline |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202220595399.2U CN216955026U (en) | 2022-03-18 | 2022-03-18 | Explosion-proof pressure relief device for vacuum pipeline |
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| Publication Number | Publication Date |
|---|---|
| CN216955026U true CN216955026U (en) | 2022-07-12 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202220595399.2U Active CN216955026U (en) | 2022-03-18 | 2022-03-18 | Explosion-proof pressure relief device for vacuum pipeline |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN216955026U (en) |
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2022
- 2022-03-18 CN CN202220595399.2U patent/CN216955026U/en active Active
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