CN113819135A - Sealing device for fastening inner hexagonal socket head cap screw - Google Patents
Sealing device for fastening inner hexagonal socket head cap screw Download PDFInfo
- Publication number
- CN113819135A CN113819135A CN202111218024.0A CN202111218024A CN113819135A CN 113819135 A CN113819135 A CN 113819135A CN 202111218024 A CN202111218024 A CN 202111218024A CN 113819135 A CN113819135 A CN 113819135A
- Authority
- CN
- China
- Prior art keywords
- screw
- flat gasket
- gasket
- screw rod
- head
- 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.)
- Pending
Links
- 238000007789 sealing Methods 0.000 title claims abstract description 24
- 239000002828 fuel tank Substances 0.000 description 4
- 239000000446 fuel Substances 0.000 description 1
- 239000000463 material Substances 0.000 description 1
- -1 polytetrafluoroethylene Polymers 0.000 description 1
- 229920001343 polytetrafluoroethylene Polymers 0.000 description 1
- 239000004810 polytetrafluoroethylene Substances 0.000 description 1
- 230000008092 positive effect Effects 0.000 description 1
Images
Classifications
-
- 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
- F16B—DEVICES FOR FASTENING OR SECURING CONSTRUCTIONAL ELEMENTS OR MACHINE PARTS TOGETHER, e.g. NAILS, BOLTS, CIRCLIPS, CLAMPS, CLIPS OR WEDGES; JOINTS OR JOINTING
- F16B43/00—Washers or equivalent devices; Other devices for supporting bolt-heads or nuts
- F16B43/001—Washers or equivalent devices; Other devices for supporting bolt-heads or nuts for sealing or insulation
-
- 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
- F16B—DEVICES FOR FASTENING OR SECURING CONSTRUCTIONAL ELEMENTS OR MACHINE PARTS TOGETHER, e.g. NAILS, BOLTS, CIRCLIPS, CLAMPS, CLIPS OR WEDGES; JOINTS OR JOINTING
- F16B35/00—Screw-bolts; Stay-bolts; Screw-threaded studs; Screws; Set screws
Abstract
The invention provides a sealing device for fastening an inner hexagonal socket head cap screw, which is characterized in that: it comprises a screw, a sealing gasket thereof and a screw head outer sleeve; the screw sealing gasket consists of a flat gasket and a cylinder, the cylinder is connected with the flat gasket in a mode of being inserted into an inner hole of the flat gasket, and the circle center of the flat gasket is positioned on the axis of the cylinder; the shape of the inner cavity of the screw head outer sleeve is as follows: the shape of the screw head is mutually compensated, the screw head comprises a circular hoop coated on the lower surface of the screw head, and a concave spigot is formed on the lower surface of the circular hoop and the inner cavity wall; the screw sealing gasket is arranged on the screw and the head sleeve thereof in a mode that the flat gasket is a convex spigot and is arranged on the concave spigot, and the cylinder above the flat gasket is inserted between the hoop and the screw rod. When the screw is screwed down, the invention realizes radial sealing and axial sealing to the threaded hole at the same time.
Description
Technical Field
The invention relates to a fastening screw sealing device, in particular to a fastening screw sealing device used on a fuel tank cover.
Background
Fuel tanks are very common in use, and the most basic requirement is the inability to leak fuel, i.e., the tightness, particularly of the tank cover. The box cover is installed on the box body generally by using hexagon socket head cap head screws and sealing gaskets thereof such as flat gaskets, the screws comprise screw heads and screw rods, correspondingly, the box cover and the box body are provided with threaded through holes matched with the screws, and the flat gaskets are sleeved on the screw rods and installed between the screw heads and the box cover to seal between the threaded through holes and the screw rods. The flat gasket can radially deform and shift after being extruded by a screw, and a round hole of the flat gasket can deviate from a screw rod and a threaded through hole, so that the sealing failure of a screw pair between the threaded through hole and the screw rod is caused, namely the oil leakage of the box cover is mostly caused by the sealing failure of the screw pair between the threaded through hole and the screw rod. Oil leakage from fuel tanks has been a problem that the art is desirous of solving.
Disclosure of Invention
In order to solve the technical problems, the invention aims to provide a sealing device for fastening a socket head cap screw.
The purpose of the invention is realized as follows: it includes screw and sealed pad, and the screw comprises screwhead and screw pole, characterized by: it also includes screw head cover; the screw sealing gasket is composed of a flat gasket and a cylindrical screw rod sleeve, the screw rod sleeve is inserted into an inner hole of the flat gasket in a cylindrical manner, the screw rod sleeve and the flat gasket are integrated at the joint of the flat gasket and the screw rod sleeve, and the circle center of the flat gasket is positioned on the axis of the cylinder; the screw head sleeve is coated on the side surface and the lower surface of the screw head and comprises an annular radial boss coated on the lower surface of the screw head, and the lower surface of the annular radial boss and the screw head sleeve form a concave spigot; the screw sealing gasket is arranged on the screw in a mode that a screw rod is sleeved on the screw rod, a flat gasket is arranged on a concave spigot as a convex spigot, and the screw rod sleeve above the flat gasket is inserted between the annular radial boss and the screw rod.
Compared with the prior art, the invention has the following positive effects: the assembled screws of the invention are inserted into the fastening threaded holes of the box cover and the box body, wherein the flat gasket of the screw sealing gasket is positioned between the box cover and the boss, and the screw rod sleeve below the flat gasket enters the fastening threaded holes along with the screw rod. When the screw is screwed down, the flat gasket tends to deform and shift in the radial direction after being extruded downwards by the screw head and the lug boss, but is positioned in the radial direction by the concave spigot without deforming and moving in the radial direction, so that the flat gasket does not deviate from the threaded hole and seals the threaded hole in the radial direction; meanwhile, the screw rod sleeve is extruded and then axially seals the threaded hole. The problem of oil leakage of the oil tank is fundamentally solved.
Drawings
The invention is further described below with reference to the accompanying drawings.
Figure 1 is a schematic view of the use of the invention on a fuel tank.
Fig. 2 is an enlarged view of a portion a of fig. 1.
Detailed Description
The screw comprises a polytetrafluoroethylene screw and a sealing gasket thereof, wherein the screw consists of a screw head 21 and a screw rod 22, and further comprises a screw head sleeve 1; the screw sealing gasket is composed of a flat gasket 31 and a cylindrical screw rod sleeve 32, the screw rod sleeve is inserted into an inner hole of the flat gasket in a cylindrical manner, the combination part of the screw rod sleeve and the flat gasket is integrated, and the circle center of the flat gasket is positioned on the axis of the cylindrical body; the screw head sleeve is coated on the side surface and the lower surface of the screw head and comprises an annular radial boss 11 coated on the lower surface of the screw head, and the lower surface of the annular radial boss and the screw head sleeve form a concave spigot; the screw gasket is mounted on the screw in such a manner that a screw rod sleeve 32 is sleeved on the screw rod 22, a flat washer 31 is mounted on the concave spigot as a convex spigot, and the screw rod sleeve above the flat washer is inserted between the annular radial boss and the screw rod. The thickness of the flat gasket 31 is 0.2-0.3 mm greater than the depth of the female spigot (considering the depth according to about 5% deformation of the material).
The assembled screws of the invention are inserted into the fastening threaded holes of the box cover 4 and the box body 5, wherein the flat gasket of the screw sealing gasket is positioned between the box cover and the lug boss, and the screw rod sleeve below the flat gasket enters the fastening threaded holes along with the screw rod. When the screw is screwed down, the flat gasket tends to deform and shift in the radial direction after being extruded downwards by the screw head and the lug boss, but is positioned in the radial direction by the concave spigot without deforming and moving in the radial direction, so that the flat gasket does not deviate from the threaded hole and seals the threaded hole in the radial direction; meanwhile, the screw rod sleeve is extruded and then axially seals the threaded hole. The problem of oil leakage of the oil tank is fundamentally solved.
Claims (2)
1. The utility model provides a fastening hexagon socket head cap screw sealing device, it includes screw and sealed the pad, and the screw comprises screw head and screw pole, characterized by: it also includes screw head cover; the screw sealing gasket is composed of a flat gasket and a cylindrical screw rod sleeve, the screw rod sleeve is inserted into an inner hole of the flat gasket in a cylindrical manner, the screw rod sleeve and the flat gasket are integrated at the joint of the flat gasket and the screw rod sleeve, and the circle center of the flat gasket is positioned on the axis of the cylinder; the screw head sleeve is coated on the side surface and the lower surface of the screw head and comprises an annular radial boss coated on the lower surface of the screw head, and the lower surface of the annular radial boss and the screw head sleeve form a concave spigot; the screw sealing gasket is arranged on the screw in a mode that a screw rod is sleeved on the screw rod, a flat gasket is arranged on a concave spigot as a convex spigot, and the screw rod sleeve above the flat gasket is inserted between the annular radial boss and the screw rod.
2. The tightening socket head cap screw sealing device according to claim 1, wherein: the thickness of the flat gasket is 0.2-0.3 mm greater than the depth of the concave spigot.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202111218024.0A CN113819135A (en) | 2021-10-20 | 2021-10-20 | Sealing device for fastening inner hexagonal socket head cap screw |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202111218024.0A CN113819135A (en) | 2021-10-20 | 2021-10-20 | Sealing device for fastening inner hexagonal socket head cap screw |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN113819135A true CN113819135A (en) | 2021-12-21 |
Family
ID=78917101
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202111218024.0A Pending CN113819135A (en) | 2021-10-20 | 2021-10-20 | Sealing device for fastening inner hexagonal socket head cap screw |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN113819135A (en) |
-
2021
- 2021-10-20 CN CN202111218024.0A patent/CN113819135A/en active Pending
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN201255280Y (en) | Sealing gasket | |
| CN216447284U (en) | Sealing device for fastening inner hexagonal socket head cap screw | |
| CN113819135A (en) | Sealing device for fastening inner hexagonal socket head cap screw | |
| CN2795615Y (en) | Seal joint for large caliber plastic pipe and pipe anti-pressure test | |
| CN211574249U (en) | Steel lining tetrafluoro tower section sealing structure | |
| CN210034684U (en) | Pipe joint sealing structure for diesel tank | |
| CN203362368U (en) | Installation mechanism for fuel injector of engine | |
| CN205136870U (en) | Fire oil pipe connection structure | |
| CN208578539U (en) | Gasket ring has the well mouth sealing device of radial seal function | |
| CN201531693U (en) | Flange seal gasket | |
| CN217207837U (en) | Prevent leaking straight tube flange ball valve | |
| CN220540557U (en) | Plastic-lined three-way pipe | |
| CN218294597U (en) | Well-sealed valve body | |
| CN220102129U (en) | High-sealing type metal hard-sealing fixed ball valve | |
| CN214946459U (en) | Valve plate sealing mechanism | |
| CN220581910U (en) | Quick-operation joint convenient to it is lubricated | |
| CN214197381U (en) | Double-loose joint ball valve structure | |
| CN220488571U (en) | Leak-proof connector for PE pipe butt joint | |
| CN215635596U (en) | Gasket and engine | |
| CN219932941U (en) | Oil tank subsea valve of transformer and transformer tank | |
| CN219809431U (en) | Gas ball valve | |
| CN220082171U (en) | High stability ball valve | |
| CN209781805U (en) | Novel bottle valve plug for non-repeated filling of steel bottle | |
| CN215812655U (en) | End plug structure of gas storage cylinder | |
| CN217845506U (en) | Box body sealing device |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| PB01 | Publication | ||
| PB01 | Publication | ||
| SE01 | Entry into force of request for substantive examination | ||
| SE01 | Entry into force of request for substantive examination |