High-pressure movable elbow capable of preventing joint chamfer from being destroyed by washing
By installing anti-impact sleeves and flow-guiding chamfers at the connection of the high-pressure movable elbow, combined with steel ball tracks and rolling steel balls, the problem of vortex impact on the chamfer of the high-pressure fluid connection is solved, thus extending the service life of the high-pressure movable elbow.
Patent Information
- Application Number
- CN202520669786.X
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2025-04-10
- Publication Date
- 2026-01-23
- Estimated Expiration
- 2035-04-10
AI Technical Summary
High-pressure fluid forms vortices at the chamfered joint of a high-pressure flexible elbow, causing structural damage and affecting its service life.
A first annular groove and a second annular groove are respectively provided at the connection between the straight head and the first elbow, and at the connection between the first elbow and the second elbow. An anti-impact sleeve is fitted inside the annular groove. A sealing groove and a flow guide chamfer are provided on the outer circle of the anti-impact sleeve. In conjunction with the steel ball track and rolling steel ball, the impact of high pressure fluid on the chamfer of the joint is reduced.
It effectively prevents the chamfered joint from being impacted by high-pressure fluid vortexes, reduces wear, and extends the service life of high-pressure flexible elbows.
Smart Images
Figure CN223825849U_ABST
Abstract
Description
Technical Field
[0001] This utility model relates to a high-pressure movable elbow that prevents the chamfer of the joint from being damaged, belonging to the technical field of movable elbows. Background Technology
[0002] High-pressure swivel elbows are metal pipeline joints equipped with ball bearings. In cementing and fracturing equipment, they not only facilitate pipeline connections but also change the direction of high-pressure fluids. Existing high-pressure swivel elbows include a straight head, a first elbow, a second elbow, and a swivel joint. Packing is installed between the chamfered joints of the straight head and the first elbow, and between the chamfered joints of the first and second elbows, primarily for sealing. During use, because the high-pressure swivel elbow has a 90° angle, the high-pressure fluid inside forms a vortex at the chamfered joint corresponding to the packing. Prolonged high-pressure impact of the high-pressure fluid on the chamfered joint directly damages the chamfered joint structure, thus affecting its service life. Therefore, improvements are necessary. Summary of the Invention
[0003] The purpose of this invention is to provide a high-pressure flexible elbow that prevents the chamfer of the joint from being destroyed, thereby reducing the impact damage caused by high-pressure fluid to the chamfer of the joint corresponding to the packing and effectively improving the service life of the high-pressure flexible elbow.
[0004] The technical solution of this utility model is:
[0005] A high-pressure movable elbow for preventing damage to the chamfer of the joint includes a straight head, a first elbow, a second elbow, and a wing nut. The straight head is threaded onto one end of the first elbow, and the second elbow is threaded onto the other end. The elbow is characterized by: a first annular groove between the straight head and the first elbow, with a first anti-impact sleeve fitted inside the first annular groove; a second annular groove between the first elbow and the second elbow, with a second anti-impact sleeve fitted inside the second annular groove; the first and second anti-impact sleeves are respectively cylindrical; multiple sealing grooves are spaced apart on the outer circumference of the first and second anti-impact sleeves; a first sealing ring is fitted inside each sealing groove; and a wing nut is movably fitted onto one end of the straight head via a fan-shaped retaining ring.
[0006] The first and second anti-impact sleeves are respectively provided with flow-guiding chamfers at both ends.
[0007] Packing is fitted onto the middle of the outer circumference of the first and second anti-impact sleeves, respectively. Installation grooves for accommodating packing are provided between the straight head and the first elbow of the packing, and between the first elbow and the second elbow.
[0008] A union sealing ring is fitted onto one end of the second elbow.
[0009] Steel ball tracks are provided at intervals between the connection between the straight head and the first bend, and between the connection between the first bend and the second bend, and multiple rolling steel balls are movably installed in the steel ball tracks.
[0010] The outer circumference of the first bend and the outer circumference of the straight section of the steel ball track are respectively provided with ball loading ports, and steel ball plugs are inserted into the ball loading ports.
[0011] A second sealing ring and a third sealing ring are provided between the connection between the straight head and the first elbow, and between the connection between the first elbow and the second elbow.
[0012] The advantages of this utility model compared with the prior art are as follows:
[0013] This high-pressure flexible elbow, designed to prevent damage to the chamfered joint, utilizes a first and second anti-impact sleeve to protect the chamfered joint corresponding to the packing, preventing it from being impacted by vortex-like forces generated by high-pressure fluid. The flow-guiding chamfer facilitates the flow of the high-pressure fluid, reducing wear on the anti-impact sleeve and allowing for smoother fluid flow. By incorporating anti-impact sleeves, this high-pressure flexible elbow prevents prolonged high-pressure impact from vortex-like forces generated by high-pressure fluid at the chamfered joint corresponding to the packing, ensuring the chamfered joint structure remains undamaged and effectively extending the service life of the high-pressure flexible elbow. Attached Figure Description
[0014] Figure 1 This is a three-dimensional structural diagram of the present invention;
[0015] Figure 2 This is a cross-sectional structural diagram of the present invention;
[0016] Figure 3 This is a three-dimensional structural diagram of the protective sleeve in this utility model;
[0017] Figure 4 This is a cross-sectional structural diagram of an existing high-pressure movable elbow in this utility model.
[0018] In the diagram: 1. Straight head; 2. First elbow; 3. Second elbow; 4. Wing nut; 5. First annular groove; 6. First anti-impact sleeve; 7. Second annular groove; 8. Second anti-impact sleeve; 9. Sealing groove; 10. First sealing ring; 11. Second sealing ring; 12. Fan-shaped retaining ring; 13. Guide chamfer; 14. Packing; 15. Union seal ring; 16. Steel ball track; 17. Rolling steel ball; 18. Ball filling port; 19. Steel ball plug; 20. Third sealing ring. Detailed Implementation
[0019] As attached Figure 1-4 As shown
[0020] The high-pressure movable elbow for preventing the chamfer of the joint from being damaged includes a straight head 1, a first elbow 2, a second elbow 3, and a wing nut 4. The straight head 1 is threaded onto one end of the first elbow 2, and the second elbow 3 is threaded onto the other end of the first elbow 2. A first annular groove 5 is provided on the inner wall between the connection between the straight head 1 and the first elbow 2. A first anti-impact sleeve 6 is fitted inside the first annular groove 5. A second annular groove 7 is provided on the inner wall between the connection between the first elbow 2 and the second elbow 3. A second anti-impact sleeve 8 is fitted inside the second annular groove 7. The first anti-impact sleeve 6 and the second anti-impact sleeve 8 (made of 15-5PH martensitic precipitation hardening stainless steel) are both in the shape of round tubes.
[0021] Four sealing grooves 9 are respectively provided on the outer circles of the first anti-impact sleeve 6 and the second anti-impact sleeve 8. A first sealing ring 10 is installed inside the sealing groove 9. The first sealing ring 10 on the outer circle of the first anti-impact sleeve 6 abuts against the inner wall of the first elbow 2 and the second elbow 3, thereby forming a seal between the first anti-impact sleeve 6 and the first elbow 2 and the second elbow 3. The second sealing ring 11 on the outer circle of the second anti-impact sleeve 8 abuts against the inner wall of the straight head 1 and the first elbow 2, thereby forming a seal between the second anti-impact sleeve 8 and the straight head 1 and the first elbow 2.
[0022] One end of the straight pipe 1 is fitted with a wing nut 4 via a fan-shaped retaining ring 12. During use, the wing nut 4 facilitates the connection of the straight pipe to other pipes on site.
[0023] The first anti-impact sleeve 6 and the second anti-impact sleeve 8 are respectively provided with flow guiding chamfers 13 at both ends. The outer edge of the flow guiding chamfer 13 of the first anti-impact sleeve 6 is flush with the inner wall of the first elbow 2 and the straight head 1, respectively. The outer edge of the flow guiding chamfer 13 of the second anti-impact sleeve 8 is flush with the inner wall of the first elbow 2 and the second elbow 3, respectively. The purpose of this arrangement is to facilitate the flow of high-pressure fluid through the flow guiding chamfer 13, reduce the wear of high-pressure fluid on the anti-impact sleeve, and make the fluid flow more smoothly.
[0024] Packing 14 is fitted onto the middle of the outer circumference of the first anti-impact sleeve 6 and the second anti-impact sleeve 8 respectively. The mounting grooves for accommodating the packing 14 are respectively provided between the straight head 1 and the first elbow 2 and between the first elbow 2 and the second elbow 3. The packing 14 plays a sealing role.
[0025] A union seal 15 is fitted on one end of the second elbow 3. During operation, the union seal 15 can seal the port of the second elbow 3, reducing the leakage of high-pressure fluid.
[0026] Three steel ball tracks 16 are provided at intervals between the connection between the straight head 1 and the first bend 2, and between the connection between the first bend 2 and the second bend 3. Multiple rolling steel balls 17 are movably installed in each steel ball track 16. The rolling steel balls 17 effectively reduce the friction between the straight head 1, the first bend 2 and the second bend 3, so that the bend can move.
[0027] Ball loading ports 18 are respectively provided on the outer circle of the first bend 2 and the outer circle of the straight head 1 corresponding to the ball track 16. The ball loading ports 18 are connected to the ball track 16. During operation, rolling steel balls 17 can be conveniently loaded into the ball track 16 through the ball loading ports 18.
[0028] A steel ball plug 19 is installed inside the ball loading port 18 by a retaining ring. During operation, the steel ball plug 19 is used to block the ball loading port 18 to prevent the rolling steel ball 17 from falling out of the ball loading port 18.
[0029] A second sealing ring 11 and a third sealing ring 20 are provided between the connection between the straight head 1 and the first elbow 2, and between the connection between the first elbow 2 and the second elbow 3. During operation, the sealing effect between the connection between the straight head 1 and the first elbow 2, and between the connection between the first elbow 2 and the second elbow 3 is further enhanced by the second sealing ring 11 and the third sealing ring 20.
[0030] When this high-pressure movable elbow designed to prevent damage to the chamfered joint is in operation, the first anti-impact sleeve 6 and the second anti-impact sleeve 8 protect the chamfered joint corresponding to the packing 14, preventing it from being impacted by vortex-induced shocks from the high-pressure fluid. The guide chamfer 13 facilitates the flow of the high-pressure fluid, reducing wear on the anti-impact sleeves and allowing for smoother fluid flow. By incorporating anti-impact sleeves, this high-pressure movable elbow prevents prolonged high-pressure impacts from vortex-induced shocks from the chamfered joint corresponding to the packing 14, ensuring the chamfered joint structure remains undamaged and effectively extending the service life of the high-pressure movable elbow.
Claims
1. A high-pressure movable elbow for preventing the chamfer of the joint from being damaged, comprising a straight head (1), a first elbow (2), a second elbow (3), and a wing nut (4), wherein the straight head (1) is threaded onto one end of the first elbow (2), and the second elbow (3) is threaded onto the other end of the first elbow (2), characterized in that: A first annular groove (5) is provided between the connection of the straight head (1) and the first elbow (2). A first anti-impact sleeve (6) is fitted inside the first annular groove (5). A second annular groove (7) is provided between the connection of the first elbow (2) and the second elbow (3). A second anti-impact sleeve (8) is fitted inside the second annular groove (7). The first anti-impact sleeve (6) and the second anti-impact sleeve (8) are respectively in the shape of a round tube. Multiple sealing grooves (9) are provided at intervals on the outer circle of the first anti-impact sleeve (6) and the second anti-impact sleeve (8). A first sealing ring (10) is fitted inside the sealing groove (9). A wing nut (4) is movably fitted at one end of the straight head (1) through a fan-shaped retaining ring (12).
2. A high-pressure movable elbow for preventing joint chamfering damage according to claim 1, characterized in that: The first anti-impact sleeve (6) and the second anti-impact sleeve (8) are respectively provided with flow guiding chamfers (13) at both ends.
3. A high-pressure movable elbow for preventing joint chamfering damage according to claim 1, characterized in that: Packing (14) is fitted on the middle of the outer circle of the first anti-impact sleeve (6) and the second anti-impact sleeve (8). There are mounting grooves for accommodating the packing (14) between the straight head (1) and the first elbow (2) and between the first elbow (2) and the second elbow (3).
4. A high-pressure movable elbow for preventing joint chamfering damage according to claim 1, characterized in that: The second elbow (3) is fitted with a union seal ring (15) at one end.
5. A high-pressure movable elbow for preventing joint chamfering damage according to claim 1, characterized in that: Steel ball tracks (16) are provided at intervals between the connection between the straight head (1) and the first bend (2) and between the connection between the first bend (2) and the second bend (3). Multiple rolling steel balls (17) are movably installed in the steel ball tracks (16).
6. A high-pressure movable elbow for preventing joint chamfering damage according to claim 5, characterized in that: The steel ball track (16) has a ball loading port (18) on the outer circle of the first bend (2) and the outer circle of the straight head (1), and a steel ball plug (19) is installed inside the ball loading port (18).
7. A high-pressure movable elbow for preventing joint chamfering damage according to claim 1, characterized in that: A second sealing ring (11) and a third sealing ring (20) are provided between the connection between the straight head (1) and the first elbow (2), and between the connection between the first elbow (2) and the second elbow (3).