CN109083919A - A kind of locking sealing device of threaded connection pair and method - Google Patents
A kind of locking sealing device of threaded connection pair and method Download PDFInfo
- Publication number
- CN109083919A CN109083919A CN201811213376.5A CN201811213376A CN109083919A CN 109083919 A CN109083919 A CN 109083919A CN 201811213376 A CN201811213376 A CN 201811213376A CN 109083919 A CN109083919 A CN 109083919A
- Authority
- CN
- China
- Prior art keywords
- screw thread
- low
- threaded connection
- melting alloy
- connection pair
- 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
- 238000000034 method Methods 0.000 title claims abstract description 19
- 238000007789 sealing Methods 0.000 title claims abstract description 16
- 229910000743 fusible alloy Inorganic materials 0.000 claims abstract description 26
- 239000000945 filler Substances 0.000 claims abstract description 12
- 239000007788 liquid Substances 0.000 claims description 20
- 239000007769 metal material Substances 0.000 claims description 8
- 239000011248 coating agent Substances 0.000 claims description 6
- 238000000576 coating method Methods 0.000 claims description 6
- 239000000463 material Substances 0.000 claims description 6
- 238000004140 cleaning Methods 0.000 claims description 5
- 238000001035 drying Methods 0.000 claims description 5
- 238000001816 cooling Methods 0.000 claims description 3
- 238000010438 heat treatment Methods 0.000 claims description 3
- 239000007787 solid Substances 0.000 claims description 3
- PCHJSUWPFVWCPO-UHFFFAOYSA-N gold Chemical compound [Au] PCHJSUWPFVWCPO-UHFFFAOYSA-N 0.000 claims description 2
- 239000010931 gold Substances 0.000 claims description 2
- 229910052737 gold Inorganic materials 0.000 claims description 2
- 238000002844 melting Methods 0.000 claims description 2
- 230000008018 melting Effects 0.000 claims description 2
- 230000001070 adhesive effect Effects 0.000 abstract description 6
- 239000000853 adhesive Substances 0.000 description 4
- 229910045601 alloy Inorganic materials 0.000 description 2
- 239000000956 alloy Substances 0.000 description 2
- 125000004122 cyclic group Chemical group 0.000 description 2
- 230000005496 eutectics Effects 0.000 description 2
- 230000032683 aging Effects 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 230000007613 environmental effect Effects 0.000 description 1
- 230000035882 stress Effects 0.000 description 1
- 239000000126 substance Substances 0.000 description 1
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
- F16B39/00—Locking of screws, bolts or nuts
- F16B39/22—Locking of screws, bolts or nuts in which the locking takes place during screwing down or tightening
- F16B39/225—Locking of screws, bolts or nuts in which the locking takes place during screwing down or tightening by means of a settable material
Landscapes
- Engineering & Computer Science (AREA)
- General Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Sealing Material Composition (AREA)
Abstract
The present invention relates to a kind of locking sealing devices of threaded connection pair, it includes externally threaded item and interior threaded part, it further include filler, the externally threaded item is to provide externally threaded fastener, affiliated interior threaded part is to provide the connected piece of internal screw thread, the external screw thread and matching for internal screw thread are combined into clearance fit, and the filler is arranged between external screw thread and coupled internal screw thread, and the filler is the low-melting alloy that fusing point is lower than 300 degrees Celsius.The present invention ensure that there is screw thread pair excellent anti-loosening property screw thread pair can be effectively prevent to loosen under various operating conditions by the adhesive property and self-strength of low-melting alloy.The invention further relates to a kind of locking encapsulating methods of threaded connection pair.
Description
Technical field
The present invention relates to a kind of locking sealing device of threaded connection pair and methods.
Background technique
In the industries such as engineering machinery, offshore equipment and pressure vessel, a large amount of fastener is used, wherein screw thread pair is
The connection of bolt external screw thread and coupled internal screw thread is the most common fastening means.Threaded connection pair is chronically at high/low temperature and follows
Under ring, complicated alternating load, vibration and impact operating condition, it is easy to appear screw thread pair loose phenomenon and thread seal leakage phenomenon, is held
Easily cause bolt fracture, insufficient pressure and safety accident.Threaded connection is usually used in the locking sealing of threaded connection pair at present
While secondary locking design, anaerobic type adhesive is coated to threaded connection pair, to reach the sealing problem for solving screw thread pair itself.
But as chemical products, anaerobic type adhesive has environmental suitability and long-time stability not strong, and is limited by aging life-span
Limitation, normally cannot effectively be on active service under many operating conditions.
Summary of the invention
It is an object of the invention to overcome disadvantages described above, a kind of reliable and stable locking sealing device of threaded connection pair is provided
And method.
A kind of technical solution of the locking sealing device of threaded connection pair of the invention is a kind of locking sealing of threaded connection pair
Device comprising externally threaded item and interior threaded part further include filler, and the externally threaded item is externally threaded tight to provide
Firmware, affiliated interior threaded part are to provide the connected piece of internal screw thread, and the external screw thread and matching for internal screw thread are combined into clearance fit,
The filler is arranged between external screw thread and coupled internal screw thread, and the filler is the eutectic that fusing point is lower than 300 degrees Celsius
Point alloy.
Preferably, it is to become solid-state by liquid that the low-melting alloy, which is filled between external screw thread and coupled internal screw thread,
's.
Preferably, the externally threaded item and the material of interior threaded part are different metal materials.
A kind of technical solution of the locking encapsulating method of threaded connection pair of the invention is a kind of locking sealing of threaded connection pair
Method comprising following steps:
Step 1, internal screw thread and the drying for cleaning bolt external screw thread and interior threaded part guarantee screw thread pair surface cleaning, drying；
Step 2, the low-melting alloy heating that will be less than 300 degrees Celsius, make it become liquid from solid-state；
Step 3, the thread surface coating liquid low melting point at the screw-internal thread fit position of bolt external screw thread and interior threaded part are closed
Gold；
Bolt is screwed into the screw thread of interior threaded part by step 4, in bolt external screw thread rundown process, remains screw thread table
The low-melting alloy of face coating persistently keeps liquid condition and has good mobility；
Step 5, cooling are until low-melting alloy becomes solid-state from liquid.
Preferably, the liquid low-melting alloy in the step 3 is coated in bolt external threaded surface.
Preferably, the material of the bolt external screw thread and interior threaded part is different metal material.
The method have the benefit that bolt external screw thread and coupled screw thread are bonded in one using low-melting alloy
It rises, ensure that screw thread pair has excellent anti-loosening property by the adhesive property and self-strength of low-melting alloy, in various works
Under condition, screw thread pair can be effectively prevent to loosen；As metal material, the thermal expansion system of low-melting alloy and bolt and connected screw thread
Number differs smaller, the threaded connection pair run under high/low temperature state of cyclic operation, comparable using low-melting alloy as coated media
Existing anaerobic type adhesive has more work condition environment adaptability；Low-melting alloy becomes solid process from liquid, can be by screw thread pair
Between gap be filled up completely, screw thread pair can effectively be sealed；As metal material, low-melting alloy and bolt and connected
The thermal expansion character for connecing screw thread differs minimum, the threaded connection pair run under high/low temperature state of cyclic operation, using low-melting alloy
As coated media, there is better locking and sealing performance than existing anaerobic type adhesive.
Detailed description of the invention
Fig. 1 is structural schematic diagram of the embodiment of the present invention；
Fig. 2 is the A-A cross-sectional view of Fig. 1.
Specific embodiment
Below by drawings and examples, technical scheme of the present invention will be described in further detail.
Referring to attached drawing, a kind of locking sealing device of threaded connection pair comprising bolt 2, interior threaded part 3 and gasket 1, also
Including filler 4, affiliated interior threaded part 3 is to provide the connected piece of internal screw thread, and the material of bolt 2 and interior threaded part 3 is
Different metal materials, the external screw thread and internal screw thread with being combined into clearance fit, the setting of filler 4 external screw thread and by
Couple between internal screw thread, the filler 4 is the low-melting alloy that fusing point is lower than 300 degrees Celsius, in external screw thread and is coupled
It is to become solid by liquid between internal screw thread, gasket 1 is additionally provided between bolt 2 and interior threaded part 3.
A kind of technical solution of the locking encapsulating method of threaded connection pair of the invention is a kind of locking sealing of threaded connection pair
Method comprising following steps:
Step 1, clean bolt 2 external screw thread and interior threaded part 3 internal screw thread and drying, guarantee screw thread pair surface cleaning, dry
Dry, the material of the internal screw thread of the external screw thread and interior threaded part 3 of bolt 2 is different metal material；
Step 2, the low-melting alloy heating that will be less than 300 degrees Celsius, make it become liquid from solid-state；
Step 3, the thread surface at the screw-internal thread fit position of the external screw thread and interior threaded part 3 of bolt 2 coat liquid eutectic
Point alloy, in order to easy to operate, the liquid low-melting alloy is the external threaded surface coated in bolt 2；
Bolt 2 is screwed into the screw thread of interior threaded part 3 by step 4, in 2 external screw thread rundown process of bolt, remains screw thread
The low-melting alloy of surface coating persistently keeps liquid condition and has good mobility；In 2 external screw thread rundown process of bolt,
Internal screw thread and the friction of external screw thread stress generate amount of heat, can ensure that the low-melting alloy of thread surface coating persistently keeps liquid
State simultaneously has good mobility；
It is step 5, cooling until low-melting alloy is from liquid becomes solid-state, thus by the external screw thread of bolt 2 and interior threaded part 3
Screw thread bonds together.
It is above one embodiment of the present invention, a preferred demonstration example.The claimed range of the present patent application
It is not only limited in the embodiment.All technical solutions equivalent with the present embodiment all belong to the scope of protection of the present invention.
Claims (6)
1. a kind of locking sealing device of threaded connection pair comprising externally threaded item and interior threaded part, which is characterized in that also wrap
Filler is included, the externally threaded item is to provide externally threaded fastener, and affiliated interior threaded part is to provide being connected for internal screw thread
Matching for fitting, the external screw thread and internal screw thread is combined into clearance fit, and the filler is arranged in external screw thread and coupled internal screw thread
Between, the filler is the low-melting alloy that fusing point is lower than 300 degrees Celsius.
2. the locking sealing device of a kind of threaded connection pair according to claim 1, which is characterized in that the low-melting alloy
Be filled in is to become solid by liquid between external screw thread and coupled internal screw thread.
3. according to claim 1 or the locking sealing device of a kind of threaded connection pair as claimed in claim 2, which is characterized in that institute
The material for stating externally threaded item and interior threaded part is different metal material.
4. a kind of locking encapsulating method of threaded connection pair, which is characterized in that itself the following steps are included:
Step 1, internal screw thread and the drying for cleaning bolt external screw thread and interior threaded part guarantee screw thread pair surface cleaning, drying；
Step 2, the low-melting alloy heating that will be less than 300 degrees Celsius, make it become liquid from solid-state；
Step 3, the thread surface coating liquid low melting point at the screw-internal thread fit position of bolt external screw thread and interior threaded part are closed
Gold；
Bolt is screwed into the screw thread of interior threaded part by step 4, in bolt external screw thread rundown process, remains screw thread table
The low-melting alloy of face coating persistently keeps liquid condition and has good mobility；
Step 5, cooling are until low-melting alloy becomes solid-state from liquid.
5. the locking encapsulating method of a kind of threaded connection pair according to claim 4, which is characterized in that in the step 3
Liquid low-melting alloy is coated in bolt external threaded surface.
6. a kind of locking encapsulating method of threaded connection pair according to claim 4 or claim 5, which is characterized in that institute
The material for stating bolt external screw thread and interior threaded part is different metal material.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201811213376.5A CN109083919A (en) | 2018-10-18 | 2018-10-18 | A kind of locking sealing device of threaded connection pair and method |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201811213376.5A CN109083919A (en) | 2018-10-18 | 2018-10-18 | A kind of locking sealing device of threaded connection pair and method |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN109083919A true CN109083919A (en) | 2018-12-25 |
Family
ID=64843741
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201811213376.5A Pending CN109083919A (en) | 2018-10-18 | 2018-10-18 | A kind of locking sealing device of threaded connection pair and method |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN109083919A (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110374972A (en) * | 2019-06-14 | 2019-10-25 | 杭州斯泰新材料技术有限公司 | Embedded locking back of the body bolt and its back of the body bolt component with flexible surrounding layer |
| CN111922465A (en) * | 2020-08-13 | 2020-11-13 | 安徽工业大学 | Adjustable machine tool base based on low-melting-point metal and adjusting method thereof |
Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1447884A (en) * | 2000-12-29 | 2003-10-08 | 贾科米尼公开有限公司 | Improved valve for gas systems |
| CN2851696Y (en) * | 2005-11-28 | 2006-12-27 | 褚雅志 | Anti-stripping fastener with bubbling function for tower and connection hole thereof |
| CN1922407A (en) * | 2004-02-20 | 2007-02-28 | 西门子公司 | Screwed connection |
| CN101004239A (en) * | 2006-11-30 | 2007-07-25 | 浙江大学 | Follower location unit in non-stress space |
| WO2007145833A3 (en) * | 2006-06-06 | 2008-11-20 | Nd Ind Inc | Fibrous microencapsulated washer for fasteners |
| CN102434565A (en) * | 2010-09-17 | 2012-05-02 | 彭俊达 | Anti-loosening screw nut group |
| CN107454912A (en) * | 2015-02-13 | 2017-12-08 | 凯密特尔有限责任公司 | Coat method, accordingly device for the method, spacecraft through processing and application thereof of sulfur-bearing sealant |
-
2018
- 2018-10-18 CN CN201811213376.5A patent/CN109083919A/en active Pending
Patent Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1447884A (en) * | 2000-12-29 | 2003-10-08 | 贾科米尼公开有限公司 | Improved valve for gas systems |
| CN1922407A (en) * | 2004-02-20 | 2007-02-28 | 西门子公司 | Screwed connection |
| CN2851696Y (en) * | 2005-11-28 | 2006-12-27 | 褚雅志 | Anti-stripping fastener with bubbling function for tower and connection hole thereof |
| WO2007145833A3 (en) * | 2006-06-06 | 2008-11-20 | Nd Ind Inc | Fibrous microencapsulated washer for fasteners |
| CN101004239A (en) * | 2006-11-30 | 2007-07-25 | 浙江大学 | Follower location unit in non-stress space |
| CN102434565A (en) * | 2010-09-17 | 2012-05-02 | 彭俊达 | Anti-loosening screw nut group |
| CN107454912A (en) * | 2015-02-13 | 2017-12-08 | 凯密特尔有限责任公司 | Coat method, accordingly device for the method, spacecraft through processing and application thereof of sulfur-bearing sealant |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110374972A (en) * | 2019-06-14 | 2019-10-25 | 杭州斯泰新材料技术有限公司 | Embedded locking back of the body bolt and its back of the body bolt component with flexible surrounding layer |
| CN111922465A (en) * | 2020-08-13 | 2020-11-13 | 安徽工业大学 | Adjustable machine tool base based on low-melting-point metal and adjusting method thereof |
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| 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 | ||
| RJ01 | Rejection of invention patent application after publication |
Application publication date: 20181225 |
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| RJ01 | Rejection of invention patent application after publication |