CN212615807U - Bolt pre-tightening assembly with high-temperature pre-tightening disc spring - Google Patents
Bolt pre-tightening assembly with high-temperature pre-tightening disc spring Download PDFInfo
- Publication number
- CN212615807U CN212615807U CN202021382703.2U CN202021382703U CN212615807U CN 212615807 U CN212615807 U CN 212615807U CN 202021382703 U CN202021382703 U CN 202021382703U CN 212615807 U CN212615807 U CN 212615807U
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- China
- Prior art keywords
- bolt
- temperature
- pretension
- nut
- shank
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- 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.)
- Expired - Fee Related
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- 239000000463 material Substances 0.000 claims abstract description 7
- 229910001069 Ti alloy Inorganic materials 0.000 claims abstract description 5
- 239000000956 alloy Substances 0.000 claims abstract description 5
- -1 polytetrafluoroethylene Polymers 0.000 claims abstract description 5
- 229920001343 polytetrafluoroethylene Polymers 0.000 claims abstract description 5
- 239000004810 polytetrafluoroethylene Substances 0.000 claims abstract description 5
- 229910052755 nonmetal Inorganic materials 0.000 claims description 3
- 230000007797 corrosion Effects 0.000 abstract description 3
- 238000005260 corrosion Methods 0.000 abstract description 3
- 208000034189 Sclerosis Diseases 0.000 abstract 1
- 238000007789 sealing Methods 0.000 description 5
- 241001391944 Commicarpus scandens Species 0.000 description 3
- 230000008878 coupling Effects 0.000 description 1
- 238000010168 coupling process Methods 0.000 description 1
- 238000005859 coupling reaction Methods 0.000 description 1
- 238000009776 industrial production Methods 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
- 239000004033 plastic Substances 0.000 description 1
- 230000036316 preload Effects 0.000 description 1
- 125000006850 spacer group Chemical group 0.000 description 1
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- Gasket Seals (AREA)
Abstract
The utility model discloses a bolt pretension subassembly with high temperature pretension dish spring, dish spring including connecting piece, gasket, shank of bolt, thread, nut and high temperature pretension. The utility model has the advantages that: the shank of bolt and nut are all made of high temperature titanium alloy material, have stronger corrosion resistance and intensity, and then ensure that the junction is difficult for the fracture, the non-metallic gasket that the gasket was made for adopting polytetrafluoroethylene material, have better stability, when using in high temperature or the medium environment that has the corrosivity, difficult shrink sclerosis, also be difficult for reducing structural strength, the nut is the detachable connection of screw thread through the screw thread interlock on the thread with the shank of bolt, be convenient for assemble this bolt pretension subassembly, high temperature pretension dish spring all is provided with two with one side of connecting piece, and high temperature pretension dish spring is the formula of stacking and overlaps and establish on the shank of bolt, be applicable to the high temperature environment, the bolt pretension of vibrations operating mode, maintain the required minimum pretightning force of gasket seal, ensure the leakproofness of junction.
Description
Technical Field
The utility model relates to a bolt pretension subassembly specifically is a bolt pretension subassembly with high temperature pretension dish spring belongs to coupling assembling technical field.
Background
In the current industrial production, a large number of flange connections exist, and a large proportion of the flange connections exist in severe production environments such as high temperature, high pressure, continuous vibration, vibration and the like. Leakage is the most common phenomenon of industrial enterprises, however, the consequences of leakage are problems that the enterprises cannot and are unwilling to see and have to solve. Flange connections are usually made up of flanges, spacers and bolts.
It is generally believed that leakage is due to gasket considerations, however, it has been found through research that 50-85% of leakage is due to relaxation of bolt pretension. When the equipment works in a high-temperature environment for a long time or is subjected to temperature, pressure fluctuation and mechanical vibration, the pretightening force of the bolt is reduced because the components such as the bolt, the gasket and the like generate creep deformation or plastic deformation. When the preload force is reduced to a certain extent, leakage occurs.
SUMMERY OF THE UTILITY MODEL
An object of the utility model is to provide a bolt pretension subassembly with high temperature pretension dish spring just in order to solve above-mentioned problem.
The utility model discloses a following technical scheme realizes above-mentioned purpose: a bolt pre-tightening assembly with a high-temperature pre-tightening disc spring comprises a connecting piece, a gasket, a bolt rod, a thread, a nut and the high-temperature pre-tightening disc spring; be provided with the gasket between the connecting piece, shank of bolt, nut and high temperature pretension dish spring constitute the major structure of this bolt pretension subassembly, the through-hole that the connecting piece was seted up is passed from one of them side of connecting piece to the shank of bolt, the thread has been seted up to the bottom of shank of bolt, just the nut is connected with the shank of bolt through the interlock on the thread, just the nut is located the another side of connecting piece, the body of shank of bolt is established to high temperature pretension dish spring cover, just high temperature pretension dish spring is located the both sides of connecting piece.
Preferably, in order to ensure that the joint is not easy to break, the bolt rod and the nut are both made of high-temperature titanium alloy materials.
Preferably, for better stability, the gasket is a non-metallic gasket made of polytetrafluoroethylene material.
Preferably, in order to facilitate the assembly of the bolt pretensioning assembly, the nut is engaged on the thread ridge through threads and is in threaded detachable connection with the bolt rod.
Preferably, in order to maintain the minimum pretightening force required by the gasket seal, ensure the sealing performance of the joint and prevent leakage, two high-temperature pretightening disc springs are arranged on the same side of the connecting piece, and the high-temperature pretightening disc springs are sleeved on the bolt rod in a stacking manner.
The utility model has the advantages that: the bolt pre-tightening assembly with the high-temperature pre-tightening disc spring is reasonable in design, the bolt rod and the nut are both made of high-temperature titanium alloy materials, and the bolt pre-tightening assembly has high corrosion resistance and strength, thereby ensuring that the joint is not easy to break, the gasket is a non-metal gasket made of polytetrafluoroethylene material, has better stability, furthermore, when the bolt is used in a high-temperature or corrosive medium environment, the bolt is not easy to shrink and harden and reduce the structural strength, the nut is engaged on the thread teeth through the thread and is in threaded detachable connection with the bolt rod, the bolt pre-tightening assembly is convenient to assemble, two high-temperature pre-tightening disc springs are arranged on the same side of the connecting piece, and the high-temperature pre-tightening disc spring is sleeved on the bolt rod in a stacking manner, so that the high-temperature pre-tightening disc spring is suitable for pre-tightening bolts under high-temperature environments and vibration working conditions, the minimum pre-tightening force required by sealing of the gasket is maintained, the sealing performance of the joint is ensured, and leakage is prevented.
Drawings
FIG. 1 is a schematic view of the overall structure of the present invention;
FIG. 2 is a schematic structural view of the bolt assembly of the present invention;
FIG. 3 is a schematic structural view of the high-temperature pre-tightening disc spring of the present invention;
fig. 4 is the utility model discloses high temperature pretension dish spring stacks the structure sketch map.
In the figure: 1. the connecting piece 2, the gasket 3, the bolt rod 4, the thread teeth 5, the nut 6 and the high-temperature pre-tightening disc spring.
Detailed Description
The technical solutions in the embodiments of the present invention will be described clearly and completely with reference to the accompanying drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only some embodiments of the present invention, not all embodiments. Based on the embodiments in the present invention, all other embodiments obtained by a person skilled in the art without creative work belong to the protection scope of the present invention.
Referring to fig. 1 to 4, a bolt pre-tightening assembly with a high-temperature pre-tightening disc spring includes a connecting member 1, a gasket 2, a bolt rod 3, a thread 4, a nut 5 and a high-temperature pre-tightening disc spring 6; be provided with gasket 2 between the connecting piece 1, shank of bolt 3, nut 5 and high temperature pretension dish spring 6 constitute the major structure of this bolt pretension subassembly, shank of bolt 3 passes the through-hole that connecting piece 1 seted up from one of them side of connecting piece 1, thread 4 has been seted up to the bottom of shank of bolt 3, just nut 5 is connected with shank of bolt 3 on thread 4 through the interlock, just nut 5 is located the another side of connecting piece 1, 6 covers of high temperature pretension dish spring are established on the pole body of shank of bolt 3, just high temperature pretension dish spring 6 is located the both sides of connecting piece 1.
The bolt rod 3 and the nut 5 are both made of high-temperature titanium alloy materials, have stronger corrosion resistance and strength, thereby ensuring that the joint is not easy to break, the gasket 2 is a non-metal gasket made of polytetrafluoroethylene material, has better stability, furthermore, when the material is used in a high-temperature or corrosive medium environment, the material is not easy to shrink and harden, and the structural strength is not easy to reduce, the nut 5 is engaged on the thread 4 through threads and is detachably connected with the bolt rod 3 through threads, so that the bolt pre-tightening assembly is convenient to assemble, two high-temperature pre-tightening disc springs 6 are arranged on the same side of the connecting piece 1, and the high-temperature pre-tightening disc spring 6 is sleeved on the bolt rod 3 in a stacking manner, is suitable for pre-tightening bolts under high-temperature environments and vibration working conditions, maintains the minimum pre-tightening force required by sealing of the gasket 2, ensures the sealing performance of the joint and prevents leakage.
The working principle is as follows: when the bolt pre-tightening assembly with the high-temperature pre-tightening disc springs is used, the stacked high-temperature pre-tightening disc springs 6 are firstly sleeved on the bolt rods 3, the bolt rods 3 penetrate through holes formed in the connecting piece 1, the stacked high-temperature pre-tightening disc springs 6 are sleeved at the thread teeth 4 ends of the bolt rods 3 and are screwed and fixed by the nuts 5, when the bolt pre-tightening assembly works, the joint is heated and pressurized, the high-temperature pre-tightening disc springs 6 can be elastically expanded to prevent the gasket 2 from being excessively compressed, after the work is finished, the temperature returns to normal, and the gasket 2 can return to the original state.
It is obvious to a person skilled in the art that the invention is not restricted to details of the above-described exemplary embodiments, but that it can be implemented in other specific forms without departing from the spirit or essential characteristics of the invention. The present embodiments are therefore to be considered in all respects as illustrative and not restrictive, the scope of the invention 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 (5)
1. The utility model provides a bolt pretension subassembly with high temperature pretension dish spring which characterized in that: the bolt comprises a connecting piece (1), a gasket (2), a bolt rod (3), a thread (4), a nut (5) and a high-temperature pre-tightening disc spring (6); be provided with gasket (2) between connecting piece (1), shank of bolt (3), nut (5) and high temperature pretension dish spring (6) constitute the major structure of this bolt pretension subassembly, the through-hole that connecting piece (1) was seted up is passed from one of them side of connecting piece (1) in shank of bolt (3), thread (4) have been seted up to the bottom of shank of bolt (3), just nut (5) are connected with shank of bolt (3) on thread (4) through the interlock, just nut (5) are located the another side of connecting piece (1), high temperature pretension dish spring (6) cover is established on the pole body of shank of bolt (3), just high temperature pretension dish spring (6) are located the both sides of connecting piece (1).
2. The bolt pretensioning assembly with the high-temperature pretensioning disc spring as claimed in claim 1, wherein: the bolt rod (3) and the nut (5) are both made of high-temperature titanium alloy materials.
3. The bolt pretensioning assembly with the high-temperature pretensioning disc spring as claimed in claim 1, wherein: the gasket (2) is a non-metal gasket made of polytetrafluoroethylene materials.
4. The bolt pretensioning assembly with the high-temperature pretensioning disc spring as claimed in claim 1, wherein: the nut (5) is engaged on the thread (4) through threads and is detachably connected with the bolt rod (3) through threads.
5. The bolt pretensioning assembly with the high-temperature pretensioning disc spring as claimed in claim 1, wherein: the high-temperature pre-tightening disc springs (6) are arranged on the same side of the connecting piece (1), and the high-temperature pre-tightening disc springs (6) are sleeved on the bolt rod (3) in a stacking mode.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202021382703.2U CN212615807U (en) | 2020-07-13 | 2020-07-13 | Bolt pre-tightening assembly with high-temperature pre-tightening disc spring |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202021382703.2U CN212615807U (en) | 2020-07-13 | 2020-07-13 | Bolt pre-tightening assembly with high-temperature pre-tightening disc spring |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN212615807U true CN212615807U (en) | 2021-02-26 |
Family
ID=74707863
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202021382703.2U Expired - Fee Related CN212615807U (en) | 2020-07-13 | 2020-07-13 | Bolt pre-tightening assembly with high-temperature pre-tightening disc spring |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN212615807U (en) |
-
2020
- 2020-07-13 CN CN202021382703.2U patent/CN212615807U/en not_active Expired - Fee Related
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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: 20210226 |