CN208268198U - A kind of sealing fixed Combination screw for electric high-voltage environment - Google Patents
A kind of sealing fixed Combination screw for electric high-voltage environment Download PDFInfo
- Publication number
- CN208268198U CN208268198U CN201820669154.3U CN201820669154U CN208268198U CN 208268198 U CN208268198 U CN 208268198U CN 201820669154 U CN201820669154 U CN 201820669154U CN 208268198 U CN208268198 U CN 208268198U
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- China
- Prior art keywords
- screw
- conical section
- diameter
- fixed combination
- ring seals
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Abstract
The utility model relates to a kind of sealing fixed Combination screws for electric high-voltage environment to solve the technical problem that screw in the prior art is not suitable for filling in insulating gas type high voltage electric equipment.When being fixed on electric component on gas tank using the utility model, screw assemblies can be by direction from screw head to the gas pressure of screw tail portion.In the case where being installed conical section, O-ring seals and section transitions Duan Junhui sink to in the consistent screw perforation of screw assemblies shape.In the case where there is gas overflowing, O-ring seals are axially compressed, and radial direction can be expanded and block screw perforation completely and improve the sealing performance of the utility model.Conical section plays buffer gas pressure, it can prevent the insulating gas in gas tank from acting directly on O-ring seals and keeping it impaired, the gas pressure acted on O-ring seals after conical section buffering substantially reduces, and is conducive to extend the service life of O-ring seals.
Description
Technical field
The utility model relates to a kind of sealing fixed Combination screws for electric high-voltage environment.
Background technique
Insulating gas type high voltage electric equipment use is filled in power grid at present to increase, insulating gas type high voltage electric equipment is filled and exists
In assembling process, it is often necessary to electric component is fixed in gas tank using screw.The screw of the prior art only has screw head
It is formed with screw tail portion, this screw is used in fill in insulating gas type high voltage electric equipment and have the disadvantage that: first is that existing skill
Screw in art can only play the role of fixed function, cannot play air seal, and gas tank interior insulation gas can be revealed and influence high pressure
The insulation performance of electrical equipment；Second is that high voltage electric field can be generated by filling in insulating gas type high voltage electric equipment operational process, commonly
Screw can generate floating potential and point discharge in high voltage electric field, influence the stable operation of high voltage electric equipment.
Utility model content
The purpose of this utility model is to provide a kind of sealing fixed Combination screws for electric high-voltage environment to solve
Screw in the prior art is not suitable for the technical problem filled in insulating gas type high voltage electric equipment.
To achieve the above object, a kind of sealing fixed Combination screw for electric high-voltage environment of the utility model uses
Following technical scheme:
A kind of sealing fixed Combination screw for electric high-voltage environment, including screw body, screw body include returning altogether
Screw head, changeover portion and the screw tail portion of shaft axis setting, the diameter of screw head, the diameter of changeover portion, screw tail portion
Diameter is sequentially increased, and screw body is made of nonferromugnetic material, and the middle part evagination of screw head is provided with conical section, conical section
With screw head coaxial line and the bigger diameter end of conical section is towards screw tail portion, and screw head is provided with far from the side of screw tail portion
Threaded portion；The bigger diameter end diameter of conical section is not more than the diameter of changeover portion, and the screw head between conical section and changeover portion is formed
For the recess section of O-ring seals installation.
Plain washer and spring washer are installed, plain washer and spring washer are also made of nonferromugnetic material on changeover portion.
Nonferromugnetic material for screw body and/or plain washer and/or spring washer to be made is X50MnCrV2014.
The diameter of the conical section bigger diameter end is equal to the diameter of changeover portion.
The both ends of screw tail portion axis direction are machined with fillet.
Screw tail portion is machined with the locking bayonet of indent on the end face of screw head.
The beneficial effects of the utility model are as follows: when electric component being fixed on gas tank using the utility model, screw
Head can be shot in the gas tank full of insulating gas, and screw tail portion can be exposed to outside gas tank, so screw assemblies can recipient
To from screw head to the gas pressure of screw tail portion.When installing the utility model, with screw assemblies screw head by
Gradually by shooting the inside of screw perforation on the outside of screw perforation, threaded portion can be gradually engaged and holding electrical portion with screw perforation
Part, in the case where being installed, conical section, O-ring seals and section transitions Duan Junhui are sunk to consistent with screw assemblies shape
In screw perforation.In the case where there is gas overflowing, O-ring seals are axially compressed, and radial direction can be expanded and block spiral shell completely
Nail perforation.So O-ring seals improve the sealing performance of the utility model.Conical section plays buffer gas pressure, can
It prevents the insulating gas in gas tank from acting directly on O-ring seals and keeping it impaired, acts on O shape after conical section buffering
Gas pressure on sealing ring substantially reduces, and is conducive to extend the service life of O-ring seals.
Detailed description of the invention
Fig. 1 is a kind of one embodiment of sealing fixed Combination screw for electric high-voltage environment of the utility model
Structural schematic diagram；
Fig. 2 is the structural schematic diagram of screw body in Fig. 1.
Specific embodiment
A kind of embodiment of the sealing fixed Combination screw for electric high-voltage environment of the utility model:
Specific structure such as Fig. 1 and figure of a kind of sealing fixed Combination screw for electric high-voltage environment of the utility model
Shown in 2, including screw body, O-ring seals 4, plain washer 5 and spring washer 6.Screw body includes rotation conllinear setting
Screw tail portion 1, screw head 2 and positioned at changeover portion 33 between the two, screw head 2, changeover portion 33 and screw tail portion 1 it is straight
Diameter is sequentially increased.
The middle part of screw head 2 is provided with conical section 31, and conical section 31 protrudes from the outer peripheral surface of screw head 2 and is total to therewith
Axis, the bigger diameter end of conical section 31 is towards screw tail portion 1.Conical section 31 makes screw head 2 be located at conical section 31 and changeover portion
Recess section 32 is formd between 33, screw head 2, which is located on the part of 31 other side of conical section, is provided with threaded portion.
In recess section 32, plain washer 5 and spring washer 6 are arranged on changeover portion 33 setting of O-ring seals 4.To guarantee
Plain washer 5 and spring washer 6 can be sleeved on changeover portion 33, and the bigger diameter end diameter of conical section 31 is straight no more than changeover portion 33
Diameter.Along screw axis direction elastic deformation can occur for spring washer 6, so plain washer 5 and spring washer 6 can play lock-screw
To prevent the effect of screw loosening.
When using the utility model holding electrical component, screw head 2 can be shot in the gas tank full of insulating gas, and spiral shell
Nail tail portion 1 can be exposed to outside gas tank, so screw assemblies can be by direction from screw head 2 to the gas pressure of screw tail portion.
When installing the utility model, as the screw head 2 of screw assemblies is gradually by shooting screw perforation on the outside of screw perforation
Inside, threaded portion can be gradually engaged and holding electrical component with screw perforation, conical section 31, O shape in the case where being installed
Sealing ring 4 and section transitions section 33 can sink to in the consistent screw perforation of screw assemblies shape.In the feelings for having gas overflowing
Under condition, O-ring seals 4 are axially compressed, and radial direction can be expanded and block screw perforation completely.So O-ring seals 4 improve
The sealing performance of the utility model.
In the utility model, the diameter of 31 bigger diameter end of conical section is equal to the diameter of changeover portion 33.
Conical section 31 plays buffer gas pressure, can prevent insulating gas in gas tank via screw perforation to excessive
It is acted directly on when out on O-ring seals 4 and keeps it impaired, act on the gas on O-ring seals 4 after the buffering of conical section 31
Body pressure substantially reduces, and is conducive to extend the service life of O-ring seals 4.
Process makes the utility model it is found that conical section 31, recess section 32 and changeover portion 33 together constitute from the above analysis
Sealing 3 with sealing performance.
Screw body, plain washer 5 and spring washer 6 are made of nonferromagnetic special material, to avoid under hyperbaric environment
Screw assemblies on generate floating potential and cause Power System Shortcuts accident.In the present embodiment, comprehensively consider material itself
Machinability, nonferromagnetic special material specifically selects X50MnCrV2014.In other embodiments, as long as to be made
The material of screw body, plain washer and spring washer will not be magnetized under hyperbaric environment, that is, can avoid going out on screw assemblies
Existing floating potential.
To avoid the screw assemblies of the utility model in electric high-voltage electrically middle point discharge, 1 axial direction of screw tail portion
Both ends be machined with fillet, and on the free end face of screw tail portion 1 process indent locking bayonet for operational instrument insert
Enter operation, the concrete shape for locking bayonet is determined by operational instrument, and common structure is hexagonal bayonet.
Claims (6)
1. a kind of sealing fixed Combination screw for electric high-voltage environment, including screw body, screw body includes revolution altogether
Axis setting screw head, changeover portion and screw tail portion, the diameter of screw head, the diameter of changeover portion, screw tail portion it is straight
Diameter is sequentially increased, it is characterised in that: screw body is made of nonferromugnetic material, and the middle part evagination of screw head is provided with circular cone
Section, conical section is with screw head coaxial line and the bigger diameter end of conical section is towards screw tail portion, and screw head is far from screw tail portion
Side is provided with threaded portion；The bigger diameter end diameter of conical section is not more than the diameter of changeover portion, the spiral shell between conical section and changeover portion
Nail head forms the recess section installed for O-ring seals.
2. a kind of sealing fixed Combination screw for electric high-voltage environment according to claim 1, it is characterised in that: mistake
It crosses and plain washer and spring washer is installed in section, plain washer and spring washer are also made of nonferromugnetic material.
3. a kind of sealing fixed Combination screw for electric high-voltage environment according to claim 2, it is characterised in that: use
In be made screw body and/or plain washer and/or spring washer nonferromugnetic material be X50MnCrV2014.
4. a kind of sealing fixed Combination screw for electric high-voltage environment according to claim 1, it is characterised in that: institute
The diameter for stating conical section bigger diameter end is equal to the diameter of changeover portion.
5. a kind of sealing fixed Combination screw for electric high-voltage environment according to any one of claim 1 to 4,
Be characterized in that: the both ends of screw tail portion axis direction are machined with fillet.
6. a kind of sealing fixed Combination screw for electric high-voltage environment according to any one of claim 1 to 4,
Be characterized in that: screw tail portion is machined with the locking bayonet of indent on the end face of screw head.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201820669154.3U CN208268198U (en) | 2018-05-07 | 2018-05-07 | A kind of sealing fixed Combination screw for electric high-voltage environment |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201820669154.3U CN208268198U (en) | 2018-05-07 | 2018-05-07 | A kind of sealing fixed Combination screw for electric high-voltage environment |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN208268198U true CN208268198U (en) | 2018-12-21 |
Family
ID=64682237
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201820669154.3U Expired - Fee Related CN208268198U (en) | 2018-05-07 | 2018-05-07 | A kind of sealing fixed Combination screw for electric high-voltage environment |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN208268198U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108397467A (en) * | 2018-05-07 | 2018-08-14 | 大盛微电科技股份有限公司 | Sealing fixed Combination screw for electric high-voltage environment |
-
2018
- 2018-05-07 CN CN201820669154.3U patent/CN208268198U/en not_active Expired - Fee Related
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108397467A (en) * | 2018-05-07 | 2018-08-14 | 大盛微电科技股份有限公司 | Sealing fixed Combination screw for electric high-voltage environment |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| GR01 | Patent grant | ||
| GR01 | Patent grant | ||
| CF01 | Termination of patent right due to non-payment of annual fee | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20181221 Termination date: 20210507 |