CN111878645A - Pipe joint with anti-loosening structure - Google Patents
Pipe joint with anti-loosening structure Download PDFInfo
- Publication number
- CN111878645A CN111878645A CN202010798306.1A CN202010798306A CN111878645A CN 111878645 A CN111878645 A CN 111878645A CN 202010798306 A CN202010798306 A CN 202010798306A CN 111878645 A CN111878645 A CN 111878645A
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- Prior art keywords
- loosening
- pipe joint
- nut
- eccentric
- nozzle
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- 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
- F16L—PIPES; JOINTS OR FITTINGS FOR PIPES; SUPPORTS FOR PIPES, CABLES OR PROTECTIVE TUBING; MEANS FOR THERMAL INSULATION IN GENERAL
- F16L19/00—Joints in which sealing surfaces are pressed together by means of a member, e.g. a swivel nut, screwed on or into one of the joint parts
- F16L19/02—Pipe ends provided with collars or flanges, integral with the pipe or not, pressed together by a screwed member
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- 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
- F16L—PIPES; JOINTS OR FITTINGS FOR PIPES; SUPPORTS FOR PIPES, CABLES OR PROTECTIVE TUBING; MEANS FOR THERMAL INSULATION IN GENERAL
- F16L15/00—Screw-threaded joints; Forms of screw-threads for such joints
- F16L15/04—Screw-threaded joints; Forms of screw-threads for such joints with additional sealings
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- Engineering & Computer Science (AREA)
- General Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Joints With Pressure Members (AREA)
Abstract
The invention discloses a pipe joint with an anti-loosening structure, which comprises a pipe joint body, a locking nut, an eccentric outer nut and an anti-loosening flat pipe nozzle, wherein a connecting threaded surface is arranged on the outer wall of the pipe joint body; the front end of the eccentric outer sleeve nut is connected with the anti-loosening flat pipe nozzle, and the rear end of the anti-loosening flat pipe nozzle is connected with the front end of the pipe joint body in a contact mode, so that the anti-loosening flat pipe nozzle and the pipe joint body are coaxially arranged. The pipe joint has the advantages of simple structure, reasonable design, high anti-loosening safety reliability, stable mechanical performance, good universality, convenient assembly and disassembly and suitability for popularization and application, and can effectively prevent the loosening of threads and avoid the leakage problem of a connecting system.
Description
Technical Field
The invention relates to the technical field of connecting pieces, in particular to a pipe joint with an anti-loosening structure.
Background
The pipe joint is a connecting tool between pipelines, is a connecting point which can be disassembled and assembled between elements and pipelines, is a part for connecting pipelines or installing the pipelines on hydraulic elements in a hydraulic system, and is also a connecting piece which can be disassembled and assembled in a fluid passage, so the pipe joint plays an indispensable important role in a pipe fitting and is one of two main components of the hydraulic pipeline. Because the pipe joint belongs to a detachable connecting element, the pipe joint meets the requirements of normal connection stability, strong sealing property, reasonable size, small pressure loss, good process performance and the like, and also meets the requirement of convenient disassembly and assembly.
The traditional pipe joint is completely connected with the pipe joint by the outer sleeve nut through threads, and the threads are easy to loosen to cause oil leakage in the use process, particularly under complex working conditions such as vibration and the like; meanwhile, with the conventional pipe joint, when a relatively narrow space is encountered during pipe connection, the connection length cannot be adjusted, thereby causing a limitation in the range of use thereof.
Disclosure of Invention
Aiming at the problems in the prior art, the invention aims to provide a pipe joint, which increases the friction force between threads by utilizing the matching of a locking nut and an eccentric outer sleeve nut, avoids the loosening of connection caused by vibration, improves the connection sealing property between the joint and a pipe by utilizing oil-resistant rubber under the action of an anti-loosening flat pipe nozzle, avoids the leakage problem of a connection system, can also change the length of the pipe joint, reduce the weight of the pipe joint and increase the use place of the pipe joint, and particularly relates to a pipe joint with an anti-loosening structure.
In order to solve the technical problems, the technical scheme adopted by the invention is as follows: a pipe joint with a locking structure comprises a pipe joint body, a locking nut, an eccentric outer nut and a locking flat pipe nozzle, the outer wall of the pipe joint body is provided with a connecting thread surface, the inner wall of the locking nut is provided with a thread matched with the connecting thread surface, the front end of the locking nut is also provided with a conical stepped hole which is concave inwards and is in an inclined state, the inner wall of the eccentric outer sleeve nut is provided with a thread matched with the connecting thread surface, the rear end part of the eccentric outer sleeve nut is provided with an eccentric connecting lip, the cross section of the eccentric connecting lip is in a ring shape, the shape of the locking nut is matched with that of the conical stepped hole, the locking nut and the eccentric outer sleeve nut are inserted into the conical stepped hole through the eccentric connecting lip, and the locking nut and the eccentric outer sleeve nut are coaxially screwed in the pipe joint body; the front end of the eccentric outer sleeve nut is connected with the anti-loosening flat pipe nozzle, the rear end of the anti-loosening flat pipe nozzle is in contact connection with the front end of the pipe joint body, and the anti-loosening flat pipe nozzle and the pipe joint body are coaxially arranged.
Furthermore, the pipe joint with the anti-loosening structure is characterized in that the front end of the pipe joint body is further provided with an inwards-recessed conical surface in an inclined state, the rear end of the anti-loosening flat pipe nozzle is provided with a conical part matched with the conical surface, the cross section of the conical part and the cross section of the conical surface are both annular, the conical surface is in contact connection with the outer wall of the conical part, and a first supporting surface is formed at the contact position; the outer wall of the anti-loosening flat nozzle is also provided with a shaft shoulder, the anti-loosening flat nozzle is in contact connection with the eccentric outer sleeve nut through the shaft shoulder, and a second supporting surface is formed at the contact position.
Furthermore, according to the pipe joint with the anti-loosening structure, a layer of oil-resistant rubber is bonded to the outer wall of the conical part and the shaft shoulder of the anti-loosening flat pipe nozzle, and the friction force between the first supporting surface and the second supporting surface can be increased through the oil-resistant rubber, so that the sealing effect is achieved.
Compared with the prior art, the pipe joint with the anti-loosening structure has the effective effects that: through the mutual matching of the pipe joint body, the locking nut, the eccentric outer sleeve nut and the anti-loosening flat pipe nozzle, the connection between the pipe joint and the pipe can be locked under the action of the eccentric connecting lip and the conical stepped hole, so that the connection looseness caused by vibration is avoided, and meanwhile, a first supporting surface is formed at the contact connection part of the conical surface and the outer wall of the conical part; a second supporting surface is formed at the contact joint of the anti-loosening flat nozzle and the eccentric outer sleeve nut, and the elasticity of the set oil-resistant rubber is utilized, so that the anti-loosening effect of the anti-loosening flat nozzle can be further improved, the connection sealing performance of a joint and a pipe can be improved, and the leakage problem of a connection system is avoided; in addition, because the conical surface is arranged along the front end of the pipe joint body, the front end of the pipe joint body is inwards sunken and is in an inclined state structure, the length of the pipe joint body can be shortened when the pipe joint body is connected with the anti-loosening flat nozzle by utilizing the sunken structure through changing the structure, and the weight of the pipe joint body can be reduced. The pipe joint has the advantages of simple structure and reasonable design, increases the friction force between threads by tightly pressing the eccentric outer sleeve nut through the locking nut, can effectively prevent the threads from loosening, improves the connection sealing performance of the joint and the pipe under the action of oil-resistant rubber, avoids the leakage problem of a connection system, has high anti-loosening safety and reliability, stable mechanical performance, is particularly suitable for assembly and connection with high anti-loosening effect requirement, has good universality and convenient assembly and disassembly, can be popularized and applied to various complex environment systems, and is suitable for popularization and application.
Drawings
The present invention will be described in further detail with reference to the accompanying drawings.
FIG. 1 is a schematic structural view of the present invention;
FIG. 2 is a schematic structural view of the pipe joint body according to the present invention;
FIG. 3 is a schematic structural view of the anti-loosening flat nozzle in accordance with the present invention.
Shown in the figure: the pipe joint comprises a pipe joint body 1, a connecting thread surface 11, a conical surface 12, a locknut 2, a conical stepped hole 21, an eccentric outer sleeve nut 3, an eccentric connecting lip 31, a locking flat nozzle 4, a shaft shoulder 41, a conical part 42 and oil-resistant rubber 5.
Detailed Description
To further illustrate the inventive concepts of the present invention, specific embodiments of the present invention will be described further below with reference to the accompanying drawings in which:
as shown in fig. 1 to 3, the pipe joint with an anti-loosening structure according to the present invention includes a pipe joint body 1, a locking nut 2, an eccentric outer nut 3, and an anti-loosening flat nozzle 4, wherein an outer wall of the pipe joint body 1 is provided with a connection screw surface 11, an inner wall of the locking nut 2 is provided with a screw thread engaged with the connection screw surface 11, a tapered stepped hole 21 recessed inward and inclined is further provided at a front end of the locking nut 2, an inner wall of the eccentric outer nut 3 is provided with a screw thread engaged with the connection screw surface 11, a rear end of the eccentric outer nut 3 is provided with an eccentric connection lip 31, the eccentric connection lip 31 has a circular cross-sectional shape and is engaged with the tapered stepped hole 21, the locking nut 2 and the eccentric outer nut 3 are inserted into the tapered stepped hole 21 through the eccentric connection lip 31, the locking nut 2 and the eccentric outer sleeve nut 3 are coaxially screwed in the pipe joint body 1; the front end of the eccentric outer nut 3 is connected with the anti-loosening flat pipe nozzle 4, the rear end of the anti-loosening flat pipe nozzle 4 is in contact connection with the front end of the pipe joint body 1, and the anti-loosening flat pipe nozzle 4 and the pipe joint body 1 are coaxially arranged.
Further, the pipe joint with the anti-loose structure is characterized in that the front end of the pipe joint body 1 is further provided with a conical surface 12 which is recessed inwards and is in an inclined state, the rear end of the anti-loose flat nozzle 4 is provided with a conical part 42 matched with the conical surface 12, the cross section of the conical part 42 and the cross section of the conical surface 12 are both in a circular ring shape, the conical surface 12 is in contact connection with the outer wall of the conical part 42, and a first supporting surface is formed at the contact position; the outer wall of the anti-loosening flat nozzle 4 is further provided with a shaft shoulder 41, the anti-loosening flat nozzle 4 is in contact connection with the eccentric outer sleeve nut 3 through the shaft shoulder 41, and a second supporting surface is formed at the contact position.
Further, according to the pipe joint with the anti-loosening structure, a layer of oil-resistant rubber 5 is bonded to the outer wall of the conical portion 42 and the shaft shoulder 41 of the anti-loosening flat nozzle 4, and friction force between the first supporting surface and the second supporting surface can be increased through the oil-resistant rubber 5, so that a sealing effect is achieved.
The pipe joint with the anti-loosening structure is adopted, wherein the anti-loosening flat pipe nozzle 4 is manufactured according to the following process: processing a metal framework → mixing of formed oil-resistant rubber → sand blasting of the anti-loosening flat nozzle encapsulation part → cleaning → coating of an adhesive → drying → vulcanization of a mold → trimming. When the pipeline is installed, the locking nut 2 is screwed on the pipe joint body 1 and screwed to the bottom, the inner wall of the opening end in the anti-loosening flat pipe nozzle 4 is aligned to the conical surface 12 on the pipe joint body 1, then the eccentric outer sleeve nut 3 is screwed, and as the contact part of the anti-loosening flat pipe nozzle 4 and the eccentric outer sleeve nut 3 is provided with the oil-resistant rubber 5, the oil-resistant rubber 5 is made of rubber, has certain elasticity, can improve the pretightening force of the oil-resistant rubber, and finally the locking nut 2 is screwed. Because the excircle of the threaded end of the eccentric outer sleeve nut 3 is eccentric, the locking nut 2 can compress the eccentric outer sleeve nut 3 in the screwing process, so that the pretightening force of the eccentric outer sleeve nut can be greatly increased, and the anti-loosening effect is achieved. Meanwhile, the layer of oil-resistant rubber 5 is arranged on the conical surface of the outer wall of the conical part 42 in the anti-loosening flat nozzle 4, and can be combined with the conical surface 12 on the pipe joint body 1 more tightly, so that the oil leakage problem caused by machining errors of the two parts is avoided. When the eccentric outer sleeve nut 3 is disassembled, all the parts can be repeatedly used after the eccentric outer sleeve nut 2 is disassembled.
Therefore, through the mutual matching of the pipe joint body 1, the locking nut 2, the eccentric outer sleeve nut 3 and the anti-loosening flat pipe nozzle 4, under the action of the eccentric connecting lip 31 and the conical stepped hole 21, the pipe joint and the pipe can be locked, the looseness of connection caused by vibration is avoided, meanwhile, as the first supporting surface is formed at the contact joint of the conical surface 12 and the outer wall of the conical part 42, the second supporting surface is formed at the contact joint of the anti-loosening flat pipe nozzle 4 and the eccentric outer sleeve nut 3, and the set oil-resistant rubber 5 has elasticity, the anti-loosening effect of the pipe joint can be further improved, the connection sealing performance of the pipe joint and the pipe can be improved, and the problem of leakage of a connecting system is avoided. In addition, because the conical surface 12 is arranged to be inwards recessed along the front end of the pipe joint body 1 and is in an inclined state structure, the length of the pipe joint body 1 can be shortened when the pipe joint body 1 is connected with the anti-loosening flat pipe nozzle 4 by means of the recess through the change of the structure, and the weight of the pipe joint body 1 can be reduced.
In conclusion, the pipe joint provided by the invention has the advantages that the structure is simple, the design is reasonable, the eccentric outer sleeve nut is tightly pressed by the locking nut, so that the friction force between threads is increased, the loosening of the threads can be effectively prevented, the connection sealing performance of the joint and the pipe is improved under the action of the oil-resistant rubber 5, the leakage problem of a connection system is avoided, the anti-loosening safety and reliability are high, the mechanical performance is stable, the pipe joint is particularly suitable for assembly and connection with high anti-loosening effect requirement, the universality is good, the assembly and disassembly are convenient, the pipe joint can be popularized and applied to various complex environment systems, and the pipe joint is suitable.
The protection scope of the present invention is not limited to the technical solutions disclosed in the specific embodiments, the above description is only a preferred embodiment of the present invention, and the present invention is not limited thereto, and any minor modifications, equivalent substitutions and improvements made according to the technical solutions of the present invention should be included in the protection scope of the technical solutions of the present invention.
Claims (3)
1. The utility model provides a coupling with locking structure which characterized in that: including coupling body (1), lock nut (2), eccentric outer nut (3) and locking flat mouthpiece (4) be equipped with connection thread face (11) on the outer wall of coupling body (1) the inner wall of lock nut (2) be equipped with connection thread face (11) matched with screw thread, and the front end of lock nut (2) still is equipped with inside sunken toper step hole (21) that is the tilt state the inner wall of eccentric outer nut (3) be equipped with connection thread face (11) matched with screw thread the rear end of eccentric outer nut (3) is equipped with eccentric connection lip (31), the cross-sectional shape of eccentric connection lip (31) is the ring form to its appearance and toper step hole (21) phase-match, pass through between lock nut (2) and the eccentric outer nut (3) eccentric connection lip (31) insert in toper step hole (21), the locking nut (2) and the eccentric outer sleeve nut (3) are coaxially screwed in the pipe joint body (1); the front end of the eccentric outer nut (3) is connected with the anti-loosening flat pipe nozzle (4), the rear end of the anti-loosening flat pipe nozzle (4) is in contact connection with the front end of the pipe joint body (1), and the anti-loosening flat pipe nozzle (4) and the pipe joint body (1) are coaxially arranged.
2. The pipe joint with the anti-loosening structure as claimed in claim 1, wherein: the front end of the pipe joint body (1) is further provided with a conical surface (12) which is inwards concave and in an inclined state, the rear end of the anti-loosening flat pipe nozzle (4) is provided with a conical part (42) matched with the conical surface (12), the cross section of the conical part (42) and the cross section of the conical surface (12) are both in a circular ring shape, the conical surface (12) is in contact connection with the outer wall of the conical part (42), and a first supporting surface is formed at the contact position; the outer wall of the anti-loosening flat nozzle (4) is further provided with a shaft shoulder (41), the anti-loosening flat nozzle (4) is in contact connection with the eccentric outer sleeve nut (3) through the shaft shoulder (41), and a second supporting surface is formed at the contact position.
3. The pipe joint with the anti-loosening structure as claimed in claim 2, wherein: a layer of oil-resistant rubber (5) is bonded to the outer wall of the conical part (42) and the shaft shoulder (41) in the anti-loosening flat nozzle (4), and the friction force between the first supporting surface and the second supporting surface can be increased through the oil-resistant rubber (5), so that the sealing effect is achieved.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202010798306.1A CN111878645A (en) | 2020-08-11 | 2020-08-11 | Pipe joint with anti-loosening structure |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202010798306.1A CN111878645A (en) | 2020-08-11 | 2020-08-11 | Pipe joint with anti-loosening structure |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN111878645A true CN111878645A (en) | 2020-11-03 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202010798306.1A Pending CN111878645A (en) | 2020-08-11 | 2020-08-11 | Pipe joint with anti-loosening structure |
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| Country | Link |
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| CN (1) | CN111878645A (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113503403A (en) * | 2021-07-14 | 2021-10-15 | 季华实验室 | Pipe joint assembly, defecation device and bed-chair integrated structure |
Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2014214880A (en) * | 2013-04-25 | 2014-11-17 | 和正豐科技股▲分▼有限公司 | Pipe joint for preventing looseness falling with tube |
| CN206608637U (en) * | 2017-03-28 | 2017-11-03 | 陆江跃 | A kind of locking pipe joint |
| CN207064892U (en) * | 2017-07-27 | 2018-03-02 | 南通爱慕希机械股份有限公司 | A kind of bite type high-pressure oil pipe joint |
| CN207864832U (en) * | 2017-12-21 | 2018-09-14 | 北京理工大学 | A kind of pipe joint sealing structure and pipe fitting |
| CN110056724A (en) * | 2019-05-27 | 2019-07-26 | 国家电网有限公司 | The locking docking pipe joint arrangement of shock-absorbing |
-
2020
- 2020-08-11 CN CN202010798306.1A patent/CN111878645A/en active Pending
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2014214880A (en) * | 2013-04-25 | 2014-11-17 | 和正豐科技股▲分▼有限公司 | Pipe joint for preventing looseness falling with tube |
| CN206608637U (en) * | 2017-03-28 | 2017-11-03 | 陆江跃 | A kind of locking pipe joint |
| CN207064892U (en) * | 2017-07-27 | 2018-03-02 | 南通爱慕希机械股份有限公司 | A kind of bite type high-pressure oil pipe joint |
| CN207864832U (en) * | 2017-12-21 | 2018-09-14 | 北京理工大学 | A kind of pipe joint sealing structure and pipe fitting |
| CN110056724A (en) * | 2019-05-27 | 2019-07-26 | 国家电网有限公司 | The locking docking pipe joint arrangement of shock-absorbing |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113503403A (en) * | 2021-07-14 | 2021-10-15 | 季华实验室 | Pipe joint assembly, defecation device and bed-chair integrated structure |
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Application publication date: 20201103 |