Orientation-adjustable elbow for oil pipeline

Abstract

The utility model discloses an orientation-adjustable elbow for an oil pipeline, and relates to the technical field of welding elbows. The straight pipe section is sleeved with a positioning sleeve, the outer side of the positioning sleeve is sleeved with a rotating sleeve, a conical column of the positioning sleeve and a conical hole of the rotating sleeve are the same in taper, the positioning sleeve is provided with a through kerf in the axial direction from the end face, the positioning sleeve is provided with a plurality of through holes from the end face, the rotating sleeve is provided with a through threaded hole, and the positioning sleeve and the rotating sleeve are connected through a bolt. The elbow has the advantages that the straight pipe sections are sleeved with the positioning sleeves, the positioning sleeves are connected with the rotating sleeves through the bolts, after the direction of the other straight pipe section of the elbow body is adjusted, the bolts are screwed one by one, the distance between the positioning sleeves and the rotating sleeves is pulled in, the kerfs are shrunk under the constraint effect of the conical holes, inner holes of the positioning sleeves are gradually shrunk, and therefore the elbow is formed. And the structural strength of the positioning sleeve can be the same as that of integrated manufacturing, so that the purpose of adjusting the orientation is achieved, the difficulty during welding and butt joint of the oil conveying pipeline is reduced, and the quality of a welding seam is improved.

Description

Technical Field

[0001] The utility model relates to the technical field of welding elbows, in particular to a direction-adjustable elbow for oil pipelines. Background Art

[0002] The welding elbows currently used have fixed directions between the inlet and outlet after the elbows are welded to the pipeline. For oil pipelines, four elbows are needed to form a U-shaped bend to compensate for thermal expansion and contraction of the pipeline. According to on-site requirements, there are many requirements for the inlet and outlet direction angles of the elbows. Currently, cutting is used to achieve the above purpose. Announcement No. CN221922464 U proposes an elbow with adjustable direction, which is connected to the external connection through a first threaded groove. After installation, the elbow body is rotated to rotate inside the slide groove. When the appropriate direction angle is adjusted, the handle is turned to move the threaded rod downward. The movement of the threaded rod causes the locking block to press against the outer surface of the elbow body to complete the fixation. However, this technical solution is only fixed with a threaded rod, and the structural strength is insufficient for oil pipelines. Utility Model Content

[0003] In order to solve the problem that the current elbow inlet and outlet directions are fixed and the adaptability is not strong, the utility model provides an elbow with adjustable direction for oil pipelines.

[0004] The technical solution provided by the utility model is: an elbow with adjustable direction for oil pipelines, comprising an elbow body, with a straight pipe section on both sides of the elbow body, a positioning sleeve on the straight pipe section, a rotating sleeve on the outer side of the positioning sleeve, an inner hole of the positioning sleeve and the straight pipe section clearance-fitting connection, the outer circle of the positioning sleeve is a conical cylinder structure, the contact surface of the rotating sleeve and the positioning sleeve is a conical hole structure, the conical cylinder and the conical hole have the same taper, the positioning sleeve is provided with a through slit along the axial direction from the end face, the positioning sleeve is provided with a plurality of through holes from the end face, the through holes are evenly arranged around the circumference, the rotating sleeve is provided with a plurality of through threaded holes, the positioning sleeve and the rotating sleeve are connected by bolts, the bolts pass through the through holes and are connected to the threaded holes, the rotating sleeve and the straight pipe section are connected by a sealing ring clearance-fitting connection, and the bottom surface of the conical hole of the rotating sleeve does not contact the conical cylinder.

[0005] There is an annular groove on the straight pipe section of the elbow body, and a sealing ring is installed in the annular groove. A step hole is processed on the inner side of the tapered hole of the rotating sleeve. The step hole is connected with the straight pipe section with a clearance fit, and there is a distance between the end face of the step hole and the straight pipe section.

[0006] A pipe end head extends outward from the outer side of the rotating sleeve, and the size of the pipe end head is consistent with that of the straight pipe section.

[0007] The straight pipe section has a scale engraved on the inner side of the positioning sleeve.

[0008] A compression spring is installed between the rotating sleeve and the positioning sleeve.

[0009] The beneficial effects of the utility model are as follows: the positioning sleeve is put on the straight pipe section, the positioning sleeve and the rotating sleeve are connected by bolts, and after the direction of the other straight pipe section of the elbow body is adjusted, the bolts are tightened one by one, the distance between the positioning sleeve and the rotating sleeve is pulled closer, the slit shrinks under the restraining effect of the tapered hole, and the inner hole of the positioning sleeve gradually shrinks until the inner hole of the positioning sleeve and the straight pipe section reach an interference fit, and the structural strength is the same as that of integrated manufacturing, thereby achieving the purpose of adjustable direction, reducing the difficulty of welding and butting the oil pipeline, and improving the quality of the weld;

[0010] The rotating sleeve can be adjusted in the length direction without damaging the sealing performance. It can also be installed on the elbow body after welding to prevent the sealing ring from being damaged by welding heat. BRIEF DESCRIPTION OF THE DRAWINGS

[0011] Attachment Figure 1 It is a structural diagram of the utility model;

[0012] Attachment Figure 2 A schematic structural diagram of the positioning sleeve in the utility model;

[0013] Attachment Figure 3 This is a schematic structural diagram of the rotary sleeve in the utility model;

[0014] Attachment Figure 4 A schematic structural diagram of the elbow body in the utility model;

[0015] Attachment Figure 5 This is an appearance diagram of the utility model.

[0016] In the figure, 1-elbow body, 11-ring groove, 12-straight pipe section, 2-positioning sleeve, 21-through hole, 22-slit, 23-conical cylinder, 3-rotating sleeve, 31-conical hole, 32-step hole, 33-pipe end, 34-threaded hole, 4-bolt, 5-sealing ring, 6-compression spring, 7-scale. DETAILED DESCRIPTION

[0017] like Figures 1 to 5As shown, an adjustable elbow for an oil pipeline includes an elbow body 1, and both sides of the elbow body 1 have a straight pipe section 12. A positioning sleeve 2 is sleeved on the straight pipe section 12, and a rotating sleeve 3 is sleeved on the outer side of the positioning sleeve 2. The inner hole of the positioning sleeve 2 is connected with the straight pipe section 12 with a clearance fit. The outer circle of the positioning sleeve 2 is a conical cylinder 23 structure, and the contact surface of the rotating sleeve 3 and the positioning sleeve 2 is a conical hole 31 structure. The conical cylinder 23 and the conical hole 31 have the same taper. The positioning sleeve 2 is provided with a through slit 22 along the axial direction from the end face, and the positioning sleeve 2 is provided with a plurality of through holes 21 from the end face. The through holes 21 are evenly arranged around the circumference. The rotating sleeve 3 is provided with a plurality of through threaded holes 34. The positioning sleeve 2 and the rotating sleeve 3 are connected by bolts 4. The bolts 4 pass through the through holes 21 and are connected with the threaded holes 34. The rotating sleeve 3 and the straight pipe section 12 are connected with a clearance fit by a sealing ring 5. The bottom surface of the conical hole 31 of the rotating sleeve 3 does not contact the conical cylinder 23.

[0018] The positioning sleeve 2 is put on the straight pipe section 12, and the positioning sleeve 2 is connected to the rotating sleeve 3 by bolts. After adjusting the direction of the other straight pipe section 12 of the elbow body 1, the bolts 4 are tightened one by one. The distance between the positioning sleeve 2 and the rotating sleeve 3 is pulled closer, and the slit 22 shrinks under the restraining effect of the tapered hole 31. The inner hole of the positioning sleeve 2 gradually shrinks until the inner hole of the positioning sleeve 2 and the straight pipe section 12 reach an interference fit. The structural strength is the same as that of integrated manufacturing, thereby achieving the purpose of adjustable direction, reducing the difficulty of welding and docking the oil pipeline, and improving the quality of the weld.

[0019] An annular groove 11 is opened on the straight pipe section 12 of the elbow body 1, and a sealing ring 5 is installed in the annular groove 11. The rotating sleeve 3 is processed with a step hole 32 on the inner side of the tapered hole 31. The step hole 32 is connected with the straight pipe section 12 with a clearance fit. There is a distance between the end face of the step hole 32 and the straight pipe section 12. The rotating sleeve 3 can be adjusted in the length direction without destroying the sealing performance. It can also be installed on the elbow body 1 after the rotating sleeve 3 is welded to prevent the sealing ring 5 from being damaged by the welding heat.

[0020] A pipe end 33 extends from the outside of the rotating sleeve 3 . The size of the pipe end 33 is consistent with that of the straight pipe section 12 and is consistent with the welded pipeline.

[0021] The straight pipe section 12 is engraved with a scale 7 on the inner side of the positioning sleeve 2 to observe the adjusted length of the rotating sleeve 3.

[0022] A compression spring 6 is installed between the rotating sleeve 3 and the positioning sleeve 2 to assist in removing the positioning sleeve 2 .

Claims

1. A direction-adjustable elbow for an oil pipeline, comprising an elbow body (1), characterized in that: Both sides of the elbow body (1) are provided with a straight pipe section (12), a positioning sleeve (2) is sleeved on the straight pipe section (12), a rotating sleeve (3) is sleeved on the outer side of the positioning sleeve (2), the inner hole of the positioning sleeve (2) is connected with the straight pipe section (12) by clearance fit, the outer circle of the positioning sleeve (2) is a conical column (23) structure, the contact surface between the rotating sleeve (3) and the positioning sleeve (2) is a conical hole (31) structure, the conical column (23) and the conical hole (31) have the same taper, and the positioning sleeve (2) is provided with a through slit (22) along the axial direction from the end face. The positioning sleeve (2) is provided with a plurality of through holes (21) extending from the end surface thereof, and the through holes (21) are evenly arranged around the circumference thereof. The rotating sleeve (3) is provided with a plurality of through threaded holes (34) extending therethrough. The positioning sleeve (2) and the rotating sleeve (3) are connected by bolts (4), and the bolts (4) pass through the through holes (21) and are connected to the threaded holes (34). The rotating sleeve (3) and the straight pipe section (12) are connected by a sealing ring (5) with clearance fit, and the bottom surface of the conical hole (31) of the rotating sleeve (3) does not contact the conical column (23).

2. The direction-adjustable elbow for oil pipeline according to claim 1, characterized in that: The straight pipe section (12) of the elbow body (1) is provided with an annular groove (11), a sealing ring (5) is installed in the annular groove (11), a stepped hole (32) is processed on the inner side of the conical hole (31) of the rotating sleeve (3), the stepped hole (32) is connected to the straight pipe section (12) with a clearance fit, and there is a distance between the end surface of the stepped hole (32) and the straight pipe section (12).

3. The direction-adjustable elbow for oil pipeline according to claim 1, characterized in that: A pipe end (33) extends outward from the rotating sleeve (3), and the size of the pipe end (33) is consistent with that of the straight pipe section (12).

4. The direction-adjustable elbow for oil pipeline according to claim 1, characterized in that: The straight pipe section (12) is engraved with a scale (7) on the inner side of the positioning sleeve (2).

5. The direction-adjustable elbow for oil pipeline according to claim 1, characterized in that: A compression spring (6) is installed between the rotating sleeve (3) and the positioning sleeve (2).

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