A 360° rotatable hydraulic transition joint

Abstract

This application belongs to the field of hydraulic joint technology and discloses a 360° rotatable hydraulic transition joint, including a rotary joint main block, a nylon washer, and a rotary joint shell. The rotary joint main block includes an L-shaped tube and a connecting tube connected to the L-shaped tube. The nylon washer is rotatably sleeved on the connecting tube, and a rotary joint threaded tube is sleeved on the nylon washer. A limit component is provided on the connecting tube. The rotary joint shell and the rotary joint threaded tube are spirally connected. A connecting hole is provided inside the rotary joint shell, and the end of the connecting tube is placed in the connecting hole. An annular groove is formed on the inner wall of the connecting hole, and a Step seal is provided in the annular groove. The inner wall of the Step seal abuts against the outer wall of the connecting tube. The rotary joint main block and the rotary joint shell are respectively connected to two oil pipes. The nylon washer, in conjunction with the rotary joint threaded tube, supports the relative rotation of the two, meeting the 360° rotation requirement and preventing the oil pipes from bending. The limit component prevents axial displacement of the rotary joint threaded tube.

Description

Technical Field

[0001] This utility model relates to the field of hydraulic joint technology, and in particular to a hydraulic transition joint that can rotate 360°. Background Technology

[0002] Hydraulic pipe fittings are components in hydraulic systems that connect high-pressure oil pipes to each other. Hydraulic pipe fittings can be further categorized into hydraulic hoses, high-pressure ball valves, quick couplings, compression fittings, welded fittings, high-pressure hoses, transition fittings, tee fittings, non-standard fittings, flared fittings, right-angle fittings, rotary fittings, stainless steel fittings, and copper fittings.

[0003] In certain special scenarios, the two connected oil pipes need to be able to rotate, even achieving 360° free rotation, to prevent damage from bending when the two oil pipes move relative to each other, thereby effectively extending their service life. However, existing conventional hydraulic joints have an overall L-shaped structure, which can only be adjusted at the installation stage for ease of construction, but cannot support relative rotation between the two oil pipes during operation. This makes the oil pipes prone to bending under forced force during actual operation, seriously affecting their service life. Utility Model Content

[0004] To solve the above problems, this utility model provides a hydraulic transition joint that can rotate 360°.

[0005] The above-mentioned technical objective of this utility model is achieved through the following technical solution: a 360° rotatable hydraulic transition joint, comprising a rotary joint main body block, a nylon washer, and a rotary joint outer shell. The rotary joint main body block includes an L-shaped tube and a connecting tube connected to the L-shaped tube. The nylon washer is rotatably sleeved on the connecting tube. A rotary joint threaded tube is sleeved on the nylon washer. A limiting component for axially limiting the rotary joint threaded tube is provided on the connecting tube. The rotary joint outer shell is helically connected to the rotary joint threaded tube. A connecting hole is provided inside the rotary joint outer shell. The end of the connecting tube is placed in the connecting hole. An annular groove is formed on the inner wall of the connecting hole. A step seal is provided in the annular groove. The inner wall of the step seal abuts against the outer wall of the connecting tube.

[0006] By adopting the above technical solution, a rotary joint main body block, a nylon washer, and a rotary joint outer shell are configured. One end of the rotary joint main body block is connected to one of the oil pipes, and the other end of the rotary joint outer shell is connected to the other oil pipe. The rotary joint main body block provides a basic connection framework for the oil pipes through the combination of an L-shaped tube and a connecting tube. The nylon washer is rotatably fitted onto the connecting tube, and in conjunction with the relationship between the rotary joint threaded tube and the connecting tube, it provides a support structure for the relative rotation of the two oil pipe sections. The limiting component limits the axis of the rotary joint threaded tube, ensuring that no axial displacement occurs during rotation and guaranteeing connection stability. The helical connection between the rotary joint outer shell and the threaded tube facilitates production and installation. The step seal ring set in the annular groove on the inner wall of the connecting hole ensures that when the end of the connecting tube is placed in the connecting hole, its inner wall tightly abuts against the outer wall of the connecting tube. This maintains a reliable seal during 360° rotation, preventing hydraulic oil leakage, while not hindering the relative rotation between the connecting tube and the rotary joint outer shell. This allows the two connected oil pipe sections to rotate flexibly according to actual working conditions, completely avoiding the problem of oil pipe bending caused by the inability to rotate, and fundamentally extending the service life of the oil pipe.

[0007] Furthermore, the upper inner wall of the rotary joint threaded pipe is provided with an annular limiting groove, and the outer wall of the connecting pipe is provided with an annular retaining groove corresponding to the annular limiting groove. The limiting component includes two semi-circular retaining rings disposed in the annular retaining groove and engaging with the annular retaining groove. The inner arc surface of the retaining ring engages with the bottom of the annular retaining groove, and the arc diameter of the outer arc surface is larger than the diameter of the connecting pipe. A retaining ring pressure plate is disposed in the annular limiting groove and engages with the annular limiting groove. The inner diameter of the retaining ring pressure plate is consistent with the arc diameter of the outer arc surface of the retaining ring.

[0008] By adopting the above technical solution, an annular limiting groove, an annular retaining groove, retaining rings, and retaining ring pressure plates are set up. During installation, the two semi-circular retaining rings are first inserted into the annular retaining groove on the outer wall of the connecting pipe, at which point the inner arc surface of the retaining rings fits against the bottom of the retaining groove. Then, the retaining ring pressure plate is embedded into the annular limiting groove on the upper inner wall of the threaded pipe of the rotary joint. Its inner diameter is consistent with the diameter of the outer arc surface of the retaining ring, thus constraining the position of the retaining ring. Part of the retaining ring is firmly embedded in the annular retaining groove, while the other part protrudes outside the annular retaining groove. This ensures smooth operation of the rotation function and enhances structural stability through limiting, effectively avoiding seal failure caused by axial movement, and further improving the reliability of the joint under long-term rotation conditions.

[0009] Furthermore, the inner wall of the rotary joint threaded tube is provided with an annular mounting groove, and a planar thrust bearing is provided in the annular mounting groove.

[0010] By adopting the above technical solution and setting up a planar thrust bearing, the relative motion performance between components can be significantly optimized. The planar thrust bearing can effectively bear axial force. When the rotary joint main block and rotary joint housing are subjected to tension or pressure and rotate, it converts the sliding friction between the rotary joint threaded pipe and related components during relative rotation into rolling friction, thereby reducing the rotational resistance of the joint. This makes the rotation of both smoother and more stable, avoiding jamming or wear caused by excessive friction. This design not only ensures the functional stability of the rotary joint's 360° rotation but also reduces component wear, further extending the service life of the entire rotary joint and indirectly providing a more reliable guarantee for the safe operation of the oil pipeline.

[0011] Furthermore, the L-shaped tube has a first semi-circular process hole, and the rotary joint threaded tube has a second semi-circular process hole that mates with the first semi-circular process hole to form a complete installation process hole.

[0012] By adopting the above technical solution, a first semi-circular process hole and a second semi-circular process hole are set. When installing the rotary joint shell and the rotary joint threaded tube, the first semi-circular process hole and the second semi-circular process hole are first matched to form a complete installation process hole. Then, a round steel bar with the same diameter as the installation process hole is inserted into the installation process hole, which can fix the rotary joint body block and the rotary joint threaded tube. Finally, the rotary joint shell is screwed onto the rotary joint threaded tube.

[0013] Furthermore, an O-ring is fitted onto one end of the connecting pipe near the L-shaped pipe, and the outer side of the O-ring abuts against the inner wall of the threaded pipe of the rotary joint.

[0014] By adopting the above technical solution and setting an O-ring, external contaminants are prevented from entering between the threaded pipe and the connecting pipe of the rotary joint, thereby improving the joint life and avoiding contamination of the hydraulic oil.

[0015] Furthermore, the upper end of the threaded tube of the rotary joint is provided with an annular fixing groove, and an annular flat washer is provided in the annular fixing groove.

[0016] Furthermore, a combination washer is fitted onto the upper part of the rotary joint housing.

[0017] In summary, this utility model has the following beneficial effects: This application includes a rotary joint main body block, a nylon washer, and a rotary joint outer shell. One end of the rotary joint main body block is connected to one of the oil pipes, and one end of the rotary joint outer shell is connected to the other oil pipe. The rotary joint main body block provides a basic connection framework for the oil pipes through the combination of an L-shaped tube and a connecting tube. The nylon washer is rotatably fitted onto the connecting tube, and in conjunction with the relationship between the rotary joint threaded tube and the connecting tube, provides a supporting structure for the relative rotation of the two oil pipe sections. The limiting component limits the axis of the rotary joint threaded tube, ensuring no axial displacement occurs during rotation and guaranteeing connection stability. The spiral connection between the rotary joint outer shell and the threaded tube facilitates production and installation. The step seal ring provided in the annular groove on the inner wall of the connecting hole ensures that when the end of the connecting tube is placed in the connecting hole, its inner wall tightly abuts against the outer wall of the connecting tube, maintaining a reliable seal during 360° rotation to prevent hydraulic oil leakage, while not hindering the relative rotation between the connecting tube and the rotary joint outer shell. This allows the two connected oil pipe sections to rotate flexibly according to actual working conditions, completely avoiding the problem of oil pipe bending caused by the inability to rotate, and fundamentally extending the service life of the oil pipe. Attached Figure Description

[0018] Figure 1 This is a schematic diagram of the overall structure of an embodiment of the present utility model;

[0019] Figure 2 yes Figure 1 A sectional view;

[0020] Figure 3 yes Figure 2 Enlarged view of part A;

[0021] Figure 4 This is a schematic diagram of the internal structure of the rotary joint threaded tube according to an embodiment of this utility model.

[0022] In the diagram: 10. Rotary joint main body block; 11. L-shaped tube; 12. Connecting tube; 13. Annular groove; 14. Step seal ring; 20. Nylon gasket; 21. Rotary joint housing; 22. Combined gasket; 30. Limiting component; 31. Snap ring; 32. Snap ring pressure plate; 40. Rotary joint threaded tube; 41. Annular limiting groove; 42. Annular snap groove; 43. Annular mounting groove; 44. Flat thrust bearing; 45. O-ring; 46. Annular fixing groove; 47. Annular flat washer; 50. First semi-circular process hole; 51. Second semi-circular process hole. Detailed Implementation

[0023] The technical solutions in the embodiments of this application will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of this application, and not all embodiments. All other embodiments obtained by those skilled in the art based on the embodiments of this application without creative effort are within the scope of protection of this application.

[0024] like Figure 1-4 As shown in the figure, this application discloses a 360° rotatable hydraulic transition joint, including a rotary joint main body block 10, a nylon washer 20, and a rotary joint housing 21. The rotary joint main body block 10 includes an L-shaped tube 11 and a connecting tube 12 connected to the L-shaped tube 11. The nylon washer 20 is rotatably sleeved on the connecting tube 12. A rotary joint threaded tube 40 is sleeved on the nylon washer 20. The rotary joint housing 21 is spirally connected to the rotary joint threaded tube 40. One end of the rotary joint main body block 10 is connected to one of the oil pipes, and one end of the rotary joint housing 21 is connected to the other oil pipe. The rotary joint main body block 10 provides a basic connection frame for the oil pipes through the combination of the L-shaped tube 11 and the connecting tube 12. The nylon washer 20 is rotatably sleeved on the connecting tube 12, and in conjunction with the relationship between the rotary joint threaded tube 40 and the connecting tube 12, it provides a support structure for the relative rotation of the two oil pipes. This allows the two connected oil pipe sections to rotate flexibly according to actual working conditions, completely avoiding the problem of oil pipe bending caused by the inability to rotate, and fundamentally extending the service life of the oil pipe. The spiral connection between the rotary joint housing 21 and the threaded pipe facilitates production and installation.

[0025] Specifically, a limiting component 30 is provided on the connecting pipe 12 to axially limit the threaded pipe 40 of the rotary joint, ensuring no axial displacement during rotation and guaranteeing connection stability. A connecting hole is provided inside the rotary joint housing 21, and the end of the connecting pipe 12 is placed inside the connecting hole. An annular groove 13 is formed on the inner wall of the connecting hole, and a step seal ring 14 is provided within the annular groove 13. The inner wall of the step seal ring 14 abuts against the outer wall of the connecting pipe 12. When the end of the connecting pipe 12 is placed inside the connecting hole, the inner wall of the step seal ring 14 in the annular groove 13 of the connecting hole tightly abuts against the outer wall of the connecting pipe 12, maintaining a reliable seal during 360° rotation to prevent hydraulic oil leakage, while not hindering the relative rotation between the connecting pipe 12 and the rotary joint housing 21.

[0026] The L-shaped tube 11 has a first semi-circular process hole 50, and the rotary joint threaded tube 40 has a second semi-circular process hole 51 that mates with the first semi-circular process hole 50 to form a complete installation process hole. When installing the rotary joint housing 21 and the rotary joint threaded tube 40, first mate the first semi-circular process hole 50 and the second semi-circular process hole 51 to form a complete installation process hole. Then, insert a round steel rod with the same diameter as the installation process hole into the installation process hole to fix the rotary joint main body block 10 to the rotary joint threaded tube 40. Finally, screw the rotary joint housing 21 onto the rotary joint threaded tube 40.

[0027] During installation, an annular limiting groove 41 is provided on the upper inner wall of the rotary joint threaded pipe 40, and an annular retaining groove 42 is provided on the outer wall of the connecting pipe 12 corresponding to the annular limiting groove 41. The limiting component 30 includes two semi-circular retaining rings 31 disposed in the annular retaining groove 42 and engaging with it. The inner arc surface of the retaining ring 31 engages with the bottom of the annular retaining groove 42, and the arc diameter of the outer arc surface is larger than the diameter of the connecting pipe 12. The annular limiting groove 41 is provided with a retaining groove 42 corresponding to the annular limiting groove 42. The retaining ring pressure plate 32 is inserted into the slot 41. The inner diameter of the retaining ring pressure plate 32 is the same as the arc diameter of the outer arc surface of the retaining ring 31. During installation, the two semi-circular arc-shaped retaining rings 31 are first inserted into the annular groove 42 on the outer wall of the connecting pipe 12, at which point the inner arc surface of the retaining ring 31 is in contact with the bottom of the groove. Then, the retaining ring pressure plate 32 is embedded into the annular limiting groove 41 on the upper inner wall of the threaded pipe 40 of the rotary joint. Its inner diameter is the same as the outer arc surface diameter of the retaining ring 31, thus constraining the position of the retaining ring 31. Part of the retaining ring 31 is firmly embedded in the annular groove 42, and the other part protrudes out of the annular groove 42. This ensures the smooth realization of the rotation function and enhances the structural stability through limiting, effectively avoiding sealing failure caused by axial movement, and further improving the reliability of the rotary joint under long-term rotation conditions.

[0028] In a specific configuration, an annular mounting groove 43 is formed on the inner wall of the rotary joint threaded tube 40. A planar thrust bearing 44 is installed within the annular mounting groove 43. The shaft ring of the planar thrust bearing 44 is connected to the connecting tube 12, and the seat ring is connected to the groove wall of the annular mounting groove 43, contacting the retaining ring 31 and the retaining ring pressure plate 32. The planar thrust bearing 44 can significantly optimize the relative motion performance between components. The planar thrust bearing 44 can effectively bear axial force. When the rotary joint body block 10 and the rotary joint housing 21 are subjected to tension or pressure and rotate, it converts the sliding friction between the rotary joint threaded tube 40 and related components during relative rotation into rolling friction, thereby reducing the rotational resistance of the joint and making the rotation of both smoother and more stable, avoiding jamming or wear caused by excessive friction. This design not only ensures the functional stability of the rotary joint in achieving 360° rotation, but also reduces component wear, further extending the service life of the entire rotary joint, and indirectly providing a more reliable guarantee for the safe operation of the oil pipeline.

[0029] An O-ring 45 is fitted onto one end of the connecting pipe 12 near the L-shaped pipe 11, with the outer side of the O-ring 45 abutting against the inner wall of the rotary joint threaded pipe 40. The O-ring 45 forms a reliable protective barrier, effectively preventing external dust, moisture, impurities, and other contaminants from entering the gap between the rotary joint threaded pipe 40 and the connecting pipe 12. This protection not only prevents contaminants from corroding and wearing internal components, reducing the risk of malfunctions caused by impurities, thus extending the overall service life of the joint; it also prevents contaminants from mixing into the hydraulic oil, ensuring the cleanliness of the hydraulic oil and guaranteeing the continuous and stable operation of the hydraulic system.

[0030] The upper end of the threaded tube 40 of the rotary joint is provided with an annular fixing groove 46, and an annular flat washer 47 is provided in the annular fixing groove 46. A combination washer 22 is fitted on the upper part of the rotary joint housing 21 to ensure stable installation of the rotary joint housing 21 and the oil pipe.

[0031] The operating principle of the 360° rotatable hydraulic transition joint in this embodiment is as follows: the main body block 10 and the outer shell 21 of the rotary joint are respectively connected to two oil pipes. A nylon washer 20, in conjunction with the threaded tube 40 of the rotary joint, supports the relative rotation of the two, meeting the 360° rotation requirement and preventing oil pipe bending. A retaining ring 31 and a retaining ring pressure plate 32 prevent axial displacement of the threaded tube 40 of the rotary joint; a planar thrust bearing 44 reduces rotational friction and ensures smooth rotation. A step seal ring 14 seals against oil leakage, and an O-ring 45 blocks contaminants. Installation process holes facilitate installation.

[0032] The above description is merely a preferred embodiment of this utility model. The protection scope of this utility model is not limited to the above embodiments. All technical solutions falling within the scope of this utility model's concept are protected. It should be noted that for those skilled in the art, any improvements and modifications made without departing from the principle of this utility model should also be considered within the protection scope of this utility model.

Claims

1. A hydraulic transition joint capable of 360° rotation, characterized in that: The assembly includes a rotary joint main body block (10), a nylon washer (20), and a rotary joint housing (21). The rotary joint main body block (10) includes an L-shaped tube (11) and a connecting tube (12) connected to the L-shaped tube (11). The nylon washer (20) is rotatably sleeved on the connecting tube (12). A rotary joint threaded tube (40) is sleeved on the nylon washer (20). A limiting component (30) for axially limiting the rotary joint threaded tube (40) is provided on the connecting tube (12). The rotary joint housing (21) is spirally connected to the rotary joint threaded tube (40). A connecting hole is provided inside the rotary joint housing (21). The end of the connecting tube (12) is placed in the connecting hole. An annular groove (13) is opened on the inner wall of the connecting hole. A step seal ring (14) is provided in the annular groove (13). The inner wall of the step seal ring (14) abuts against the outer wall of the connecting tube (12).

2. A 360° rotatable hydraulic transition joint according to claim 1, characterized in that: The upper inner wall of the rotary joint threaded pipe (40) is provided with an annular limiting groove (41), and the outer wall of the connecting pipe (12) is provided with an annular retaining groove (42) corresponding to the annular limiting groove (41). The limiting component (30) includes two semi-circular retaining rings (31) disposed in the annular retaining groove (42) and engaging with the annular retaining groove (42). The inner arc surface of the retaining ring (31) engages with the bottom of the annular retaining groove (42), and the arc diameter of the outer arc surface is greater than the diameter of the connecting pipe (12). The annular limiting groove (41) is provided with a retaining ring pressure plate (32) that engages with the annular limiting groove (41). The inner diameter of the retaining ring pressure plate (32) is consistent with the arc diameter of the outer arc surface of the retaining ring (31).

3. A 360° rotatable hydraulic transition joint according to claim 1, characterized in that: The inner wall of the rotary joint threaded tube (40) is provided with an annular mounting groove (43), and a planar thrust bearing (44) is provided in the annular mounting groove (43).

4. A 360° rotatable hydraulic transition joint according to claim 1, characterized in that: The L-shaped tube (11) has a first semi-circular process hole (50), and the rotary joint threaded tube (40) has a second semi-circular process hole (51) that cooperates with the first semi-circular process hole (50) to form a complete installation process hole.

5. A 360° rotatable hydraulic transition joint according to claim 1, characterized in that: An O-ring (45) is fitted on one end of the connecting pipe (12) near the L-shaped pipe (11), and the outer side of the O-ring (45) abuts against the inner wall of the rotary joint threaded pipe (40).

6. A 360° rotatable hydraulic transition joint according to claim 1, characterized in that: The upper end of the rotary joint threaded tube (40) is provided with an annular fixing groove (46), and an annular flat washer (47) is provided in the annular fixing groove (46).

7. A 360° rotatable hydraulic transition joint according to claim 1, characterized in that: A combination washer (22) is fitted on the upper part of the rotary joint housing (21).

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