CN218934347U - Concave-convex arc interference fit sealing special threaded joint for oil sleeve - Google Patents
Concave-convex arc interference fit sealing special threaded joint for oil sleeve Download PDFInfo
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- CN218934347U CN218934347U CN202222042788.5U CN202222042788U CN218934347U CN 218934347 U CN218934347 U CN 218934347U CN 202222042788 U CN202222042788 U CN 202222042788U CN 218934347 U CN218934347 U CN 218934347U
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
- Y02E10/00—Energy generation through renewable energy sources
- Y02E10/20—Hydro energy
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Abstract
The special threaded joint comprises a connected external threaded pipe body, a coupling with internal threads and a concave-convex arc surface interference fit mechanism, wherein the coupling is used for connecting the external threaded pipe body and the internal threads; the concave cambered surface interference fit mechanism comprises a first internal thread convex cambered surface, a first straight line section, a first chamfering cambered surface, a first shoulder included angle, a first external thread concave cambered surface, a second straight line section and a second chamfering cambered surface, wherein the first internal thread convex cambered surface is arranged at the position of the coupling, which is close to the internal shoulder, one end of the first internal thread convex cambered surface is provided with the first straight line section, and one end of the first straight line section is provided with the first chamfering cambered surface.
Description
Technical Field
The utility model relates to a joint, in particular to a special threaded joint for sealing an oil sleeve by concave-convex arc interference fit.
Background
The special threaded joint of the oil sleeve adopts a composite structure with a torque shoulder and a primary metal sealing surface to realize the sealing at the joint of the oil sleeve. The metal sealing surface of the joint has interference sealing forms such as conical surface-conical surface, conical surface- (convex) cambered surface, (convex) cambered surface- (convex) cambered surface, cylindrical surface-cylindrical surface or (convex) cambered surface-cylindrical surface and the like. The conical surface-conical surface sealing structure has the advantages of larger contact length after interference, insensitivity to interference and load, high sealing reliability and more use. The cambered surface-cambered surface structure is formed by contacting two convex cambered surfaces, and the local contact pressure of the positions of the two cambered surface convex points after the internal and external threaded connectors are screwed in the use process is found to be larger, so that the internal pressure sealing strength is higher. However, when a large axial tensile load exists in the service process, the sealing positions of the two convex points in the original design contact are subjected to relative displacement dislocation, so that the original sealing contact pressure is rapidly reduced, the special joint does not have sealing performance, and the reliability is reduced.
Disclosure of Invention
Aiming at the situation, in order to overcome the defects in the prior art, the utility model provides the special threaded joint sealed by concave-convex arc interference fit for the oil sleeve, which effectively solves the problems in the technical background.
In order to achieve the above purpose, the present utility model provides the following technical solutions: the utility model comprises a connected external threaded pipe body, a coupling with internal threads and a concave cambered surface interference fit mechanism, wherein the coupling with internal threads is used for connection, and the connection part of the external threaded pipe body and the end part of the coupling with internal threads is connected through the concave cambered surface interference fit mechanism;
the concave cambered surface interference fit mechanism comprises a first internal thread convex cambered surface, a first straight line section, a first chamfering cambered surface, a first shoulder included angle, a first external thread concave cambered surface, a second straight line section and a second chamfering cambered surface, wherein the first internal thread convex cambered surface is arranged at the position of the coupling close to the internal shoulder, one end of the first internal thread convex cambered surface is provided with the first straight line section, one end of the first straight line section is provided with the first chamfering cambered surface, the included angle at the bottom of the internal shoulder of the coupling is the first shoulder included angle, the first external thread concave cambered surface is arranged at the position of the external thread pipe body close to the end part, one end of the first external thread concave cambered surface is provided with the second straight line section, and one end of the second straight line section is provided with the second chamfering cambered surface.
Preferably, the radius of the first external thread concave cambered surface is 4.5-8mm, the arc length of the first external thread concave cambered surface is 1.5-2.5mm, and the lengths of the first straight line segment and the second straight line segment are not more than 1mm.
Preferably, the second chamfer cambered surface is not less than 0.8mm, the radius of the first internal thread convex cambered surface is 4-7.5mm, the cambered surface length of the first internal thread convex cambered surface is greater than 2.5mm, and the radius of the first chamfer cambered surface is not greater than 0.5mm.
The special threaded joint comprises a connected external threaded pipe body, a coupling with internal threads and a convex cambered surface interference fit mechanism, wherein the coupling is used for connecting the external threaded pipe body and the internal threads;
the convex cambered surface interference fit mechanism comprises a second internal thread concave cambered surface, a first transition chamfering cambered surface, a third straight line section, a third chamfering cambered surface, a second shoulder included angle, a second external thread convex cambered surface, a second transition chamfering cambered surface, a fourth straight line section and a fourth chamfering cambered surface, wherein the second internal thread concave cambered surface is arranged at the position of the coupling close to the inner shoulder, the first transition chamfering cambered surface is arranged at one end of the second internal thread concave cambered surface, the third straight line section is arranged at one end of the first transition chamfering cambered surface, the third chamfering cambered surface is arranged at one end of the third straight line section, the included angle at the bottom of the inner shoulder of the coupling is a second included angle, the second external thread convex cambered surface is arranged at the position of the external thread pipe close to the end, the second transition chamfering cambered surface is arranged at one end of the second external thread convex cambered surface, and the fourth chamfering cambered surface is arranged at one end of the fourth straight line section.
Preferably, the radius of the convex cambered surface of the second external thread is 4.5-8mm, the radii of the first transition chamfer cambered surface and the second transition chamfer cambered surface are 0.4-1.2mm, the radius of the fourth chamfer cambered surface is not less than 0.8mm, the radius of the concave cambered surface of the second internal thread is 5-8.5mm, the lengths of the third straight line section and the fourth straight line section are not more than 1mm, the radius of the third chamfer cambered surface is not more than 0.5mm, the cambered surface length of the convex cambered surface of the second external thread is 1.5-3.0mm, and the cambered surface length of the concave cambered surface of the second internal thread is more than 2.5mm.
Preferably, the first shoulder included angle and the second shoulder included angle are 74 degrees to 80 degrees.
The beneficial effects are that: when the special threaded joint is used, the internal/external threaded joint is a convex cambered surface, the external/internal threaded joint is a concave cambered surface, the purpose is to integrate the comprehensive advantages of the conical surface, the conical surface and the cambered surface, the longer contact length of the sealing surfaces is ensured, the higher contact pressure between the sealing surfaces is ensured, and even under the action of larger axial tensile load, the enough sealing contact length and the sealing contact pressure are still ensured.
Drawings
The accompanying drawings are included to provide a further understanding of the utility model and are incorporated in and constitute a part of this specification, illustrate the utility model and together with the embodiments of the utility model, serve to explain the utility model. In the drawings:
FIG. 1 is a schematic overall structure of a first embodiment of the present utility model;
FIG. 2 is a schematic view of the partial structure of FIG. 1A according to the present utility model;
FIG. 3 is a schematic overall structure of a second embodiment of the present utility model;
FIG. 4 is a schematic view of the partial structure of B in FIG. 3 according to the present utility model;
reference numerals in the drawings: 1. an externally threaded tubular body; 2. coupling; 3. the concave cambered surface interference fit mechanism; 4. a first internal thread convex cambered surface; 5. a first straight line segment; 6. a first chamfer cambered surface; 7. a first shoulder angle; 8. a first external thread concave cambered surface; 9. a second straight line segment; 10. a second chamfer cambered surface; 11. a convex cambered surface interference fit mechanism; 12. a second female threaded concave cambered surface; 13. a first transition chamfer cambered surface; 14. a third straight line segment; 15. a third chamfer cambered surface; 16. a second shoulder angle; 17. a second external thread convex cambered surface; 18. a second transitional chamfer cambered surface; 19. a fourth straight line segment; 20. and a fourth chamfering cambered surface.
Detailed Description
The following describes embodiments of the present utility model in further detail with reference to FIGS. 1-4.
The utility model provides a special screwed joint sealed by concave-convex arc interference fit for an oil sleeve, which is provided by the embodiment I, and comprises a connected external threaded pipe body 1, a coupling 2 with internal threads and a concave arc interference fit mechanism 3, wherein the connection part of the end part of the external threaded pipe body 1 and the end part of the coupling 2 with the internal threads is connected by the concave arc interference fit mechanism 3, the taper of the threads of the external threaded pipe body 1 and the coupling 2 is 1:16, the torque of a make-up shoulder is larger, and the number of turns of the make-up shoulder between the contact of a sealing surface and the torque of the make-up shoulder is 0.5-1.0 turn in the screwing process of the make-up shoulder;
the concave cambered surface interference fit mechanism 3 comprises a first internal thread convex cambered surface 4, a first straight line section 5, a first chamfer cambered surface 6, a first shoulder included angle 7, a first external thread concave cambered surface 8, a second straight line section 9 and a second chamfer cambered surface 10, wherein the first internal thread convex cambered surface 4 is arranged at the position, close to the internal shoulder, of the coupling 2, one end of the first internal thread convex cambered surface 4 is provided with the first straight line section 5, one end of the first straight line section 5 is provided with the first chamfer cambered surface 6, the included angle at the bottom of the internal shoulder of the coupling 2 is the first shoulder included angle 7, the first external thread concave cambered surface 8 is arranged at the position, close to the end, of the external thread pipe body 1, the second straight line section 9 is arranged at one end of the first external thread concave cambered surface 8, and the second chamfer cambered surface 10 is arranged at one end of the second straight line section 9.
The radius of the first external thread concave cambered surface 8 is 4.5-8mm, the arc surface length of the first external thread concave cambered surface 8 is 1.5-2.5mm, and the lengths of the first straight line segment 5 and the second straight line segment 9 are not more than 1mm.
The second chamfering cambered surface 10 is not smaller than 0.8mm, the radius of the first internal thread convex cambered surface 4 is 4-7.5mm, the cambered surface length of the first internal thread convex cambered surface 4 is larger than 2.5mm, and the radius of the first chamfering cambered surface 6 is not larger than 0.5mm.
The second embodiment, given by fig. 2 and 3, provides a special screwed joint sealed by concave-convex arc interference fit for an oil sleeve, comprising a connected external threaded pipe body 1, a coupling 2 with internal threads and a convex arc interference fit mechanism 11, wherein the joint of the external threaded pipe body 1 and the end part of the coupling 2 is connected by the convex arc interference fit mechanism 11;
the convex arc surface interference fit mechanism comprises a second internal thread concave arc surface 12, a first transition chamfer arc surface 13, a third straight line section 14, a third chamfer arc surface 15, a second shoulder included angle 16, a second external thread convex arc surface 17, a second transition chamfer arc surface 18, a fourth straight line section 19 and a fourth chamfer arc surface 20, wherein the second internal thread concave arc surface 12 is arranged at the position of the coupling 2 close to the internal shoulder, a first transition chamfer arc surface 13 is arranged at one end of the second internal thread concave arc surface 12, a third straight line section 14 is arranged at one end of the first transition chamfer arc surface 13, a third chamfer arc surface 15 is arranged at one end of the third straight line section 14, an included angle at the bottom of the internal shoulder of the coupling 2 is a second shoulder included angle 16, a second external thread convex arc surface 17 is arranged at the position of the external thread pipe body 1 close to the end, a second transition chamfer arc surface 18 is arranged at one end of the second external thread convex arc surface 17, a fourth straight line section 19 is arranged at one end of the fourth transition chamfer arc surface 20.
The radius of the second external thread convex cambered surface 17 is 4.5-8mm, the radius of the first transition chamfer cambered surface 13 and the second transition chamfer cambered surface 18 is 0.4-1.2mm, the radius of the fourth chamfer cambered surface 20 is not less than 0.8mm, the radius of the second internal thread concave cambered surface 12 is 5-8.5mm, the lengths of the third straight line section 14 and the fourth straight line section 19 are not more than 1mm, the radius of the third chamfer cambered surface 15 is not more than 0.5mm, the cambered surface length of the second external thread convex cambered surface 17 is 1.5-3.0mm, and the cambered surface length of the second internal thread concave cambered surface 12 is more than 2.5mm.
The first shoulder included angle 7 and the second shoulder included angle 16 are 74-80 degrees.
The beneficial effects are that: when the special threaded joint is used, the internal/external threaded joint is a convex cambered surface, the external/internal threaded joint is a concave cambered surface, the purpose is to integrate the comprehensive advantages of the conical surface, the conical surface and the cambered surface, the longer contact length of the sealing surfaces is ensured, the higher contact pressure between the sealing surfaces is ensured, and even under the action of larger axial tensile load, the enough sealing contact length and the sealing contact pressure are still ensured.
When the sealing structure of the concave cambered surface of the external threaded joint and the convex cambered surface of the internal threaded joint shown in the figure 2 is applied to an oil pipe with the diameter of phi 114.30 multiplied by 6.88mm, the specific size design of the sealing and shoulder structure is shown in the following table. The connection threads of the externally threaded pipe body 1 and the coupling 2 adopt BC threads in the API SPEC 5B standard.
When the male cambered surface-female cambered surface sealing structure of the external threaded joint shown in fig. 3 is applied to a phi 139.70×7.72mm sleeve, specific dimensions of the sealing and shoulder structure are designed as shown in the following table. The threads of connection of threaded tubular body 1 to coupling 2 are BC threads in the API SPEC 5B standard.
Finally, it should be noted that: the foregoing description is only a preferred embodiment of the present utility model, and the present utility model is not limited thereto, but it is to be understood that modifications and equivalents of some of the technical features described in the foregoing embodiments may be made by those skilled in the art, although the present utility model has been described in detail with reference to the foregoing embodiments. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present utility model should be included in the protection scope of the present utility model.
Claims (6)
1. The utility model provides a special screwed joint of unsmooth arc interference fit seal for oil jacket, includes external screw thread body (1) that are connected and is used for carrying out the coupling (2) that have the internal screw thread of connecting, its characterized in that: the pipe further comprises a concave cambered surface interference fit mechanism (3), and the joint of the external thread pipe body (1) and the end part of the coupling (2) of the internal thread is connected through the concave cambered surface interference fit mechanism (3);
concave cambered surface interference fit mechanism (3) are including first internal thread convex cambered surface (4), first straight line section (5), first chamfer cambered surface (6), first circular bead contained angle (7), first external screw thread concave cambered surface (8), second straight line section (9) and second chamfer cambered surface (10), coupling (2) are close to inside circular bead position department and are provided with first internal thread convex cambered surface (4), the one end of first internal thread convex cambered surface (4) is provided with first straight line section (5), the one end of first straight line section (5) is provided with first chamfer cambered surface (6), the contained angle of coupling (2) inside circular bead bottom is first circular bead contained angle (7), external screw thread body (1) is provided with first external screw thread concave cambered surface (8) near tip position department, the one end of first external screw thread concave cambered surface (8) is provided with second straight line section (9), the one end of second straight line section (9) is provided with second chamfer cambered surface (10).
2. The special sealing threaded joint for the concave-convex arc interference fit of the oil sleeve according to claim 1, wherein the radius of the first external thread concave cambered surface (8) is 4.5-8mm, the cambered surface length of the first external thread concave cambered surface (8) is 1.5-2.5mm, and the lengths of the first straight line segment (5) and the second straight line segment (9) are not more than 1mm.
3. The special sealing threaded joint for the concave-convex arc interference fit of the oil sleeve according to claim 1, wherein the radius of the second chamfering cambered surface (10) is not smaller than 0.8mm, the radius of the first internal thread convex cambered surface (4) is 4-7.5mm, the cambered surface length of the first internal thread convex cambered surface (4) is larger than 2.5mm, and the radius of the first chamfering cambered surface (6) is not larger than 0.5mm.
4. A male-female arcuate interference-fit sealing special threaded joint for oil casings according to claim 1, characterized in that the first shoulder angle (7) and the second shoulder angle (16) are at an angle of 74 ° to 80 °.
5. The utility model provides a special screwed joint of unsmooth arc interference fit seal for oil jacket, includes external screw thread body (1) that are connected and is used for carrying out the coupling (2) that have the internal screw thread of connecting, its characterized in that: the pipe further comprises a convex cambered surface interference fit mechanism (11), and the joint of the external threaded pipe body (1) and the end part of the coupling (2) of the internal thread is connected through the convex cambered surface interference fit mechanism (11);
the convex cambered surface interference fit mechanism comprises a second internal thread concave cambered surface (12), a first transition chamfering cambered surface (13), a third straight line section (14), a third chamfering cambered surface (15), a second shoulder included angle (16), a second external thread convex cambered surface (17), a second transition chamfering cambered surface (18), a fourth straight line section (19) and a fourth chamfering cambered surface (20), wherein the coupling (2) is close to the internal shoulder position, the second internal thread concave cambered surface (12) is arranged at one end of the second internal thread concave cambered surface (12), the first transition chamfering cambered surface (13) is arranged at one end of the second internal thread concave cambered surface (12), the third straight line section (14) is arranged at one end of the first transition chamfering cambered surface (13), the third chamfering cambered surface (15) is arranged at one end of the third straight line section (14), the included angle at the bottom of the internal shoulder of the coupling (2) is the second shoulder included angle (16), the external thread pipe body (1) is close to the end position, the second external thread convex cambered surface (17) is arranged at one end of the second transition cambered surface (18), the fourth straight line section (19) is arranged at one end of the second transition chamfering cambered surface (18), and the fourth straight line section (19) is arranged at one end of the fourth straight line section (20).
6. The special threaded joint for the concave-convex interference fit seal for the oil sleeve according to claim 5, wherein the radius of the second external thread convex cambered surface (17) is 4.5-8mm, the radius of the first transition chamfer cambered surface (13) and the second transition chamfer cambered surface (18) is 0.4-1.2mm, the radius of the fourth chamfer cambered surface (20) is not less than 0.8mm, the radius of the second internal thread concave cambered surface (12) is 5-8.5mm, the lengths of the third straight line section (14) and the fourth straight line section (19) are not more than 1mm, the radius of the third chamfer cambered surface (15) is not more than 0.5mm, the cambered surface length of the second external thread convex cambered surface (17) is 1.5-3.0mm, and the cambered surface length of the second internal thread concave cambered surface (12) is more than 2.5mm.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202222042788.5U CN218934347U (en) | 2022-08-04 | 2022-08-04 | Concave-convex arc interference fit sealing special threaded joint for oil sleeve |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202222042788.5U CN218934347U (en) | 2022-08-04 | 2022-08-04 | Concave-convex arc interference fit sealing special threaded joint for oil sleeve |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN218934347U true CN218934347U (en) | 2023-04-28 |
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ID=86086828
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202222042788.5U Active CN218934347U (en) | 2022-08-04 | 2022-08-04 | Concave-convex arc interference fit sealing special threaded joint for oil sleeve |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN218934347U (en) |
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2022
- 2022-08-04 CN CN202222042788.5U patent/CN218934347U/en active Active
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