CN217153457U - Connecting joint for PFA pipeline - Google Patents
Connecting joint for PFA pipeline Download PDFInfo
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- CN217153457U CN217153457U CN202123156504.7U CN202123156504U CN217153457U CN 217153457 U CN217153457 U CN 217153457U CN 202123156504 U CN202123156504 U CN 202123156504U CN 217153457 U CN217153457 U CN 217153457U
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- inclined plane
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- pipeline
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Abstract
The utility model discloses a connecting joint for PFA pipeline, which comprises a connecting main body, a supporting ring and a nut, wherein the supporting ring comprises a conflict part and a convex part, the connecting main body is cylindrical, a sealing part is integrally arranged on the inner side wall of the connecting main body, and the conflict part is in conflict with the sealing part; an annular lug is integrally arranged on one side of the protruding part, which is far away from the abutting part, a gap is formed between the annular lug and the protruding part, and the annular lug can be tightly attached to the protruding part; the nut is in threaded connection with the connecting body, an extrusion part is integrally arranged at one end of the nut, and the extrusion part is abutted to the annular protruding piece. The pipeline is inserted into the supporting ring, the nut is screwed into the connecting body, the sealing part and the abutting part on the connecting body form a first seal, and the extruding part and the pipeline are tightly pressed and attached to form a second seal. The utility model provides a pair of annular lug is flattened and is laminated with the bellying in the attach fitting that PFA pipeline was used, and annular lug has certain elasticity to guarantee sealed reliability.
Description
Technical Field
The application relates to the field of pipeline connecting devices, in particular to a connecting joint for a PFA pipeline.
Background
Resin pipe joints are used in manufacturing apparatuses in the technical fields of semiconductor manufacturing, medical and pharmaceutical manufacturing, food processing, and chemical industry. The ultra-pure pipeline is used for conveying substances such as toxic substances, strong acid, strong alkali and the like which are harmful to human body contact, and valves, pipe fittings and the like in the pipeline are required to be tightly connected, so that leakage is avoided. There are two current connection methods: one is welding, but the replacement and maintenance of the pipe fittings and the valves are inconvenient after the welding. The other is thermal expansion connection, but the connection method needs large torque, has poor sealing performance and is easy to leak.
SUMMERY OF THE UTILITY MODEL
In order to improve the sealing performance of the connection structure and reduce the occurrence of leakage, the application provides a connection joint for PFA pipelines.
The technical scheme adopted by the connecting joint for the PFA pipeline is as follows:
a connecting joint for PFA pipelines comprises a connecting main body, a support ring and a nut, wherein the support ring comprises a collision part and a bulge part, the connecting main body is cylindrical, a sealing part is integrally arranged on the inner side wall of the connecting main body, and the collision part is collided with the sealing part;
an annular lug is integrally arranged on one side of the protruding part, which is far away from the abutting part, a gap is formed between the annular lug and the protruding part, and the annular lug can be tightly attached to the protruding part;
the nut is in threaded connection with the connecting body, an extrusion part is integrally arranged at one end of the nut, and the extrusion part is abutted to the annular protruding piece.
Through adopting above-mentioned technical scheme, insert the pipeline in the support ring, insert the nut with support ring and pipeline together, the nut is twisted connecting body again, and the last sealing of connecting body forms first seal with conflict portion, and the extrusion portion compresses tightly the laminating with the pipeline and forms the second and seal. The annular protruding piece is flattened and is attached to the protruding portion, and the annular protruding piece has certain elasticity, so that the sealing reliability is guaranteed.
Optionally, a first inclined plane is arranged on one side of the extrusion part, which is abutted against the annular lug, the inclined angle of the inclined plane bulge part is matched,
by adopting the technical scheme, the contact area between the extrusion part and the annular convex sheet is increased, and the sealing property is improved.
Optionally, a second inclined plane is disposed at a position of the connecting body close to the protruding portion, and when the first inclined plane is abutted to the annular protruding piece, the second inclined plane is abutted to the protruding portion.
Through adopting above-mentioned technical scheme, the second inclined plane contradicts with the bellying and forms the third and seal to the leakproofness that connects has been improved.
Optionally, the interference part is circumferentially provided with an annular groove.
Through adopting above-mentioned technical scheme, the annular groove can be arranged in to the one end of pipeline to reduce the emergence of connecting the main part and extrude the phenomenon of pipeline.
Optionally, the sealing part has been seted up the embedded groove, conflict portion an organic whole is provided with the embedding part, works as when first inclined plane and annular lug are inconsistent, the embedding part can be arranged in the embedded groove and contradict with conflict portion.
Through adopting above-mentioned technical scheme, embedding portion is put in conflict portion and contradicts with conflict portion to the leakproofness of joint has been improved.
Optionally, a third inclined plane is arranged on the inner wall of the embedded groove, a fourth inclined plane is arranged on the embedded portion, and the third inclined plane is abutted to the fourth inclined plane.
Through adopting above-mentioned technical scheme, increased the flow path that the in-process was revealed to liquid to improve the leakproofness of joint, the third inclined plane leads to the embedding part simultaneously, thereby makes things convenient for the joint installation.
Compared with the prior art, the beneficial effects of the utility model are that:
the utility model discloses a set up support ring and annular lug, with the pipeline insert in the support ring, insert the nut with support ring and pipeline together, the nut twists the connecting body again, the last sealing of connecting body forms first sealed with conflict portion, extrusion portion compresses tightly the laminating with the pipeline and forms the second and seal. The annular lug is flattened and attached to the boss, and the annular lug has certain elasticity, so that the sealing reliability is ensured, and the leakage phenomenon is reduced;
the utility model increases the contact area between the extrusion part and the annular lug and improves the sealing property by arranging the first inclined plane;
the utility model is provided with the annular groove, one end of the pipeline can be arranged in the annular groove, thereby reducing the phenomenon that the pipeline is extruded by the connecting main body;
the utility model discloses a set up third inclined plane and fourth inclined plane, the third inclined plane leads to embedding portion to the joint installation of convenience.
Drawings
FIG. 1 is a cross-section of a connection fitting for a PFA pipe of the present invention;
fig. 2 is an installation section of a connection joint for PFA piping of the present invention.
In the figure: 1. a connecting body; 2. a support ring; 21. a contact part; 22. a boss portion; 23. an annular groove; 24. an insertion section; 25. a fourth slope; 3. a nut; 4. a sealing part; 5. an annular tab; 6. a pressing section; 7. a first inclined plane; 8. a second inclined plane; 9. a groove is embedded; 10. a third inclined plane.
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 and 2, the present invention provides an embodiment of a connection joint for PFA piping, which includes a connection body 1, a support ring 2, and a nut 3. The connecting body 1 is cylindrical, the support ring 2 includes an abutting portion 21 and a protruding portion 22, the abutting portion 21 is fixedly connected with one end of the protruding portion 22, and the abutting portion 21 is communicated with the protruding portion 22. The inner side wall of the connecting body 1 is integrally provided with a sealing part 4, and the abutting part 21 abuts against the sealing part 4.
Referring to fig. 1 and 2, the annular protruding piece 5 is integrally arranged on one side of the protruding portion 22 away from the interference portion 21, a gap exists between the annular protruding piece 5 and the protruding portion 22, and the annular protruding piece 5 can be tightly attached to the protruding portion 22. The opening between the annular tab 5 and the boss 22 faces the nut 3. The nut 3 is in threaded connection with the connecting body 1, a squeezing portion 6 is integrally arranged at one end of the nut 3, and the squeezing portion 6 is abutted to the annular protruding piece 5.
Referring to fig. 1 and 2, a pipeline is inserted into a support ring 2, the support ring 2 and the pipeline are inserted into a nut 3 together, the nut 3 is screwed into a connecting body 1, a sealing part 4 and an interference part 21 on the connecting body 1 form a first seal, and a pressing part 6 and the pipeline are pressed and attached to form a second seal. The annular protruding piece 5 is flattened and attached to the protruding portion 22, the annular protruding piece 5 has certain elasticity, sealing reliability is guaranteed, and therefore leakage is reduced.
Referring to fig. 1 and 2, the side of the extrusion part 6, which is abutted to the annular protruding piece 5, is provided with a first inclined surface 7, the inclined angle of the first inclined surface 7 is matched with that of the protruding part 22, and the first inclined surface 7 can be tightly attached to the inclined surface of the protruding part 22, so that the contact area between the extrusion part 6 and the annular protruding piece 5 is increased, the flow path in the liquid leakage process is increased, the sealing performance of the joint is improved, and the leakage phenomenon is reduced.
Referring to fig. 1 and 2, the connecting body 1 is provided with a second inclined surface 8 at a position close to the protruding portion 22, and when the first inclined surface 7 abuts against the annular protruding piece 5, the second inclined surface 8 abuts against the protruding portion 22. The second inclined surface 8 and the bulge 22 are in interference contact to form a third seal, so that the sealing performance of the joint is improved. The interference portion 21 is circumferentially provided with an annular groove 23. One end of the pipe may be placed in the annular groove 23, thereby reducing the occurrence of the phenomenon that the connecting body 1 extrudes the pipe.
Referring to fig. 1 and 2, the sealing portion 4 is opened with an insertion groove 9, and the interference portion 21 is integrally provided with an insertion portion 24, and when the first inclined surface 7 is in interference with the annular protruding piece 5, the insertion portion 24 can be placed in the insertion groove 9 and in interference with the interference portion 21. The embedded portion 24 is disposed in the interference portion 21 and interferes with the interference portion 21, thereby improving sealability of the joint. The inner wall of the embedded groove 9 is provided with a third inclined surface 10, the embedded part 24 is provided with a fourth inclined surface 25, and the third inclined surface 10 is abutted against the fourth inclined surface 25. The flow path during the liquid leakage process is increased to improve the sealability of the joint, and the third inclined surface 10 guides the insertion portion 24 to facilitate the installation of the joint.
The working principle of the connecting joint for PFA pipelines is as follows:
the pipeline is inserted into the support ring 2, the support ring 2 and the pipeline are inserted into the nut 3 together, the nut 3 is screwed into the connecting body 1, the sealing part 4 and the abutting part 21 on the connecting body 1 form a first seal, and the extruding part 6 and the pipeline are pressed and attached to form a second seal. The annular convex sheet 5 is flattened to be attached to the convex part 22, and the annular convex sheet 5 has certain elasticity, so that the sealing reliability is ensured.
The first inclined plane 7 is matched with the inclined angle of the convex part 22, so that the contact area of the squeezing part 6 and the annular convex sheet 5 is increased, and the sealing performance is improved. The interference portion 21 is circumferentially provided with an annular groove 23. One end of the pipe may be placed in the annular groove 23, thereby reducing the occurrence of the phenomenon that the connecting body 1 extrudes the pipe. The insertion portion 24 is disposed in the interference portion 21 and interferes with the interference portion 21, thereby improving sealability of the joint and reducing the occurrence of leakage.
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.
Claims (6)
1. A connector fitting for PFA tubing, comprising: the connecting structure comprises a connecting body (1), a supporting ring (2) and a nut (3), wherein the supporting ring (2) comprises a collision part (21) and a protruding part (22), the connecting body (1) is cylindrical, a sealing part (4) is integrally arranged on the inner side wall of the connecting body (1), and the collision part (21) is abutted to the sealing part (4);
an annular convex piece (5) is integrally arranged on one side, away from the abutting part (21), of the protruding part (22), a gap is reserved between the annular convex piece (5) and the protruding part (22), and the annular convex piece (5) can be tightly attached to the protruding part (22);
the nut (3) is in threaded connection with the connecting body (1), an extrusion part (6) is integrally arranged at one end of the nut (3), and the extrusion part (6) is abutted to the annular protruding piece (5).
2. A connector fitting for PFA tubing according to claim 1, wherein: the extrusion part (6) is provided with a first inclined plane (7) on one side abutting against the annular protruding piece (5), and the inclined angle of the first inclined plane (7) is matched with that of the protruding part (22).
3. A connector fitting for PFA tubing according to claim 2, wherein: second inclined plane (8) have been seted up in connecting main body (1) position that is close to bellying (22), work as when first inclined plane (7) contradict with annular lug (5), second inclined plane (8) contradict with bellying (22).
4. A connector fitting for PFA tubing according to claim 1, wherein: the interference part (21) is provided with an annular groove (23) along the circumferential direction.
5. A connector fitting for PFA tubing according to claim 3, wherein: embedded groove (9) have been seted up in sealing portion (4), conflict portion (21) an organic whole is provided with embedding portion (24), works as when first inclined plane (7) and annular lug (5) are inconsistent, embedding portion (24) can be arranged in embedded groove (9) and inconsistent with conflict portion (21).
6. A connector fitting for PFA tubing according to claim 5, wherein: third inclined plane (10) have been seted up to the inner wall of embedded groove (9), fourth inclined plane (25) have been seted up in embedding portion (24), third inclined plane (10) and fourth inclined plane (25) are inconsistent.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202123156504.7U CN217153457U (en) | 2021-12-15 | 2021-12-15 | Connecting joint for PFA pipeline |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202123156504.7U CN217153457U (en) | 2021-12-15 | 2021-12-15 | Connecting joint for PFA pipeline |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN217153457U true CN217153457U (en) | 2022-08-09 |
Family
ID=82683853
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202123156504.7U Active CN217153457U (en) | 2021-12-15 | 2021-12-15 | Connecting joint for PFA pipeline |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN217153457U (en) |
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2021
- 2021-12-15 CN CN202123156504.7U patent/CN217153457U/en active Active
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