CN202646320U - Protection device for fastening element of anti-explosion electric product - Google Patents
Protection device for fastening element of anti-explosion electric product Download PDFInfo
- Publication number
- CN202646320U CN202646320U CN 201220325468 CN201220325468U CN202646320U CN 202646320 U CN202646320 U CN 202646320U CN 201220325468 CN201220325468 CN 201220325468 CN 201220325468 U CN201220325468 U CN 201220325468U CN 202646320 U CN202646320 U CN 202646320U
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- sheath
- fastening element
- hole
- diameter
- fastening piece
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Abstract
The utility model relates to a protection device for a fastening element of an anti-explosion electric product. The protection device for the fastening element of the anti-explosion electric product comprises a cylindrical sheath, wherein the sheath is provided with a step hole consisting of a large hole and a small hole, the large hole and the small hole are coaxial, in addition, the diameter of the large hole is greater than the diameter of the head part of the fastening element, and the diameter of the small hole is greater than the diameter of the threaded part of the fastening element. The sheath with the step hole is adopted and can replace a counter hole drilled in a connecting end cover for protecting the fastening element, the machining time can be reduced, the assembly speed is accelerated, and the cost is reduced. Because the bottom surface of the large hole in the sheath is parallel to the side surface of the sheath near the small hole end, so the sheath can also realize the effect of a flat gasket, and further, the cost is saved. Because a sealing cover is buckled in the large hole of the sheath in a sealed way, the rusting corrosion on the fastening element caused by humid air can be effectively isolated, and the reliability and the safety of the anti-explosion protection device for the fastening element of the electric product are enhanced.
Description
Technical field
The utility model relates to a kind of protective equipment, is specifically related to a kind of protective equipment for the ex electrical product fastening piece.
Background technique
According to stipulating in the GB3836.2-2010 standard, the fastening piece of anti-explosion product case member, its head should have guard ring or counterbore, or by the inherent protection of device structure.Purpose is to cause when preventing that fastener head is subject to impacting fastening piece to damage to lose efficacy to cause potential safety hazard.Existing ex electrical product generally all adopts at exposed end cap when using the fastening piece securing means and beats counter sink, the head of fastening piece is embedded in the counter sink, thereby plays a protective role.But because the weight of a lot of ex electrical products is large, bores counter sink and need to waste a large amount of manpower and materials, efficient is not high.
Summary of the invention
The utility model is in order to overcome the deficiency of above technology, provides a kind of and can conveniently ex electrical product have been carried out ex electrical product fastening piece protective equipment fastening and that fastening piece is effectively protected
The technological scheme that its technical problem that overcomes the utility model adopts is:
This ex electrical product fastening piece protective equipment, comprise cylindrical sheath, described sheath is provided with the step hole that is comprised of macropore and aperture, and the coaxial and large bore dia of its macropore and aperture is greater than the head diameter of fastening piece, and hole diameter is greater than the helical thread portion diameter of fastening piece.
The bottom surface of above-mentioned macropore is parallel to the side of its close small bore end in the sheath.
Also comprise the sealing cover that is the boss Flange-shaped Parts, described sealing cover lug boss position sealing is fastened in the macropore.
The beneficial effects of the utility model are: adopt sheath with step hole can be substituted in connecting end and cover and beat counter sink fastening piece is protected, can reduce machining time, improve assembling speed, reduce cost.Because the bottom surface of macropore is parallel to its side near small bore end of sheath in the sheath, thereby sheath can also play the effect of plain washer, thereby further provides cost savings.Because seal cap sealing is fastened in the macropore of sheath, so can effectively completely cut off humid air to the corrosion of fastening piece, has strengthened reliability and the Security of ex electrical product fastening piece protective equipment.
Description of drawings
Fig. 1 is structural representation of the present utility model;
Fig. 2 is the structural representation of the utility model sheath
Among the figure, 1. sheath 2. sealing covers 3. fastening pieces 4. elastic washers 5. end caps 6. box flanges 7. macropores 8. apertures.
Embodiment
Be described further below in conjunction with accompanying drawing 1,2 pairs of the utility model of accompanying drawing.
This ex electrical product fastening piece protective equipment, comprise cylindrical sheath 1, described sheath 1 is provided with the step hole that is comprised of macropore 7 and aperture 8, and coaxial and macropore 7 diameters of its macropore 7 and aperture 8 are greater than the head diameter of fastening piece 3, and aperture 8 diameters are greater than the helical thread portion diameter of fastening piece 3.When the fastening explosion-proof electric apparatus product of needs, sheath 1 is put into the outside of end cap 5, and the aperture 8 in the sheath 1 is overlapped with through hole on the end cap 5, then fastening piece 3 is screwed on the box flange 6.Because the head of fastening piece 3 is the macropores 7 that are arranged in sheath 1, cause potential safety hazard so cause fastening piece to damage inefficacy in the time of can effectively avoiding fastener head to be subject to impacting.
The bottom surface of above-mentioned macropore 7 is parallel to sheath 1 its side near aperture 8 ends, thereby fastening just can the assurance keeps vertical with fastened box flange 6.Therefore sheath 1 can be used as the plain washer use, only elastic washer 4 need to be penetrated can play in the fastening piece 3 during installation and loosen effect.Thereby further provide cost savings.
Also comprise the sealing cover 2 that is the boss Flange-shaped Parts, described sealing cover 2 lug boss position sealing is fastened in the macropore 7, can effectively completely cut off humid air to the corrosion of fastening piece, has strengthened reliability and the Security of ex electrical product fastening piece protective equipment.
Claims (3)
1. ex electrical product fastening piece protective equipment, it is characterized in that: comprise cylindrical sheath (1), described sheath (1) is provided with the step hole that is comprised of macropore (7) and aperture (8), coaxial and macropore (7) diameter of its macropore (7) and aperture (8) is greater than the head diameter of fastening piece (3), and aperture (8) diameter is greater than the helical thread portion diameter of fastening piece (3).
2. ex electrical product fastening piece protective equipment according to claim 1 is characterized in that: the bottom surface of described macropore (7) is parallel to its side near aperture (8) end of sheath (1).
3. ex electrical product fastening piece protective equipment according to claim 1 and 2 is characterized in that: also comprise the sealing cover (2) that is the boss Flange-shaped Parts, the sealing of described sealing cover (2) lug boss position is fastened in the macropore (7).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201220325468 CN202646320U (en) | 2012-07-06 | 2012-07-06 | Protection device for fastening element of anti-explosion electric product |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201220325468 CN202646320U (en) | 2012-07-06 | 2012-07-06 | Protection device for fastening element of anti-explosion electric product |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN202646320U true CN202646320U (en) | 2013-01-02 |
Family
ID=47415434
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 201220325468 Expired - Fee Related CN202646320U (en) | 2012-07-06 | 2012-07-06 | Protection device for fastening element of anti-explosion electric product |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN202646320U (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103244542A (en) * | 2013-05-10 | 2013-08-14 | 江苏永昊高强度螺栓有限公司 | Stably-connected bolt |
| CN111810510A (en) * | 2020-08-10 | 2020-10-23 | 海盐鼎丰紧固件股份有限公司 | Hexagonal bolt in automobile wheel hub |
-
2012
- 2012-07-06 CN CN 201220325468 patent/CN202646320U/en not_active Expired - Fee Related
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103244542A (en) * | 2013-05-10 | 2013-08-14 | 江苏永昊高强度螺栓有限公司 | Stably-connected bolt |
| CN111810510A (en) * | 2020-08-10 | 2020-10-23 | 海盐鼎丰紧固件股份有限公司 | Hexagonal bolt in automobile wheel hub |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20130102 Termination date: 20140706 |
|
| EXPY | Termination of patent right or utility model |