Multi-connection-mode double-seal three-way device

Abstract

The multi-connection-mode double-sealing three-way device comprises a three-way body, a pipe sleeve oil port connector assembly and an outer cone welding connector, the two ends of a straight-through part in the three-way body are provided with an inner cone face sealing connector and an outer cone face sealing connector respectively, and the end of the straight-through part is provided with a guide sealing connector; inner cavities of the inner conical surface sealing connector, the outer conical surface sealing connector and the guide sealing connector are communicated with one another, the end of the outer conical welding connector is inserted into the inner conical surface sealing connector, the outer conical surface sealing connector is sleeved with the pipe sleeve oil port connector assembly, and the guide sealing connector is inserted into the valve body. The problem that an oil port is not fixedly connected with an internal thread for locking and the fastening capability of an oil pipe joint cannot meet the requirement of overload vibration, so that looseness occurs, and oil leakage occurs at the joint is solved, and the sealing performance is improved.

Description

Technical Field

[0001] The invention belongs to the field of hydraulic equipment, and in particular relates to a multi-connection double-sealed three-way device. Background Art

[0002] At present, most of the tees in the engineering machinery industry have a T-shaped external thread locking structure, and are mostly used to connect directly with the corresponding transition joints, or 24° cone sealing joints in soft and hard pipe assemblies. However, some host products, such as the clutch and steering brake valve oil ports of bulldozers, are not equipped with internal threads for fixing and locking. The sealing joints they are connected with are straight-insert cylindrical tables with O-seal grooves for installation. They play a sealing role through interference fit, and prevent loosening by limiting the distance between the end faces of the two end joints welded on the metal pipe assembly and the bottom hole. Therefore, improving and optimizing the connection method and sealing form is an important means to improve the sealing quality of the steering system of the driving machine products.

[0003] In the steering hydraulic system of the pusher machine product, the space between the two symmetrical oil ports on the steering brake valve and the clutch oil port is narrow, and the parallelism requirement for the connected oil pipes is high. O-rings are often cut during installation. The existing steering brake valves and clutch oil ports do not have fixed internal thread locking, but are straight-insert cylindrical holes and O-ring sealing structures. The tightening capacity of the connected oil pipe joints cannot meet the overload vibration and become loose, resulting in oil leakage at the connection.

[0004] The existing patent, publication number CN106122621, discloses a guide fixed double sealing method and a sealing device thereof, wherein a conical surface sealing structure and a cylindrical surface sealing structure are sequentially arranged from the outside to the inside at the socket part, and the conical surface sealing structure and the cylindrical surface sealing structure are used together as a guide mechanism, and then a sealing joint matching the guide mechanism structure is inserted into the guide mechanism for fixed sealing. Although some problems are solved, the following problems still exist: 1. This structural device is a T-shaped design in which the inner cone and the O-ring are combined to achieve sealing, and is only suitable for a single connection method between the oil port components in the hydraulic system; 2. This structure cannot be connected and fastened with the existing blind hole and internal thread oil port; 3. This structure cannot be connected with the welding pipe sleeve with the guide straight hole and the inner cone structure during use. Summary of the invention

[0005] In view of the problems existing in the above-mentioned prior art, the present invention provides a multi-connection mode double-seal tee device, the structural feature of which is that its tee body is a composite structure of multiple connection modes, and its main characteristics are: the guide sealing joint at the lower end of the tee body is a composite compression sealing structure of double-seal connection combining flange and straight plug-in type, the inner cone sealing interface of the tee body is suitable for commonly used outer cone welding joints to achieve double sealing and fastening connection, the outer cone sealing interface of the tee body is provided with a sealing ring and an outer cone double sealing structure, which can realize double sealing connection with a composite structure pipe sleeve oil port joint assembly with a guide cylindrical hole combined with inner cone surfaces of different angles, thereby solving the above-mentioned problems.

[0006] In order to achieve the above-mentioned purpose, the technical solution adopted by the present invention is: a multi-connection double-seal tee device, comprising: a tee body, a pipe sleeve oil port joint assembly, and an outer cone welding joint. The two ends of the straight through in the tee body are respectively an inner cone sealing interface and an outer cone sealing interface, and the end of the middle through is a guide sealing joint. The inner cone sealing interface, the outer cone sealing interface, and the internal cavities of the guide sealing joint are interconnected. The end of the outer cone welding joint is inserted into the inner cone sealing interface, the pipe sleeve oil port joint assembly is sleeved on the outer cone sealing interface, and the guide sealing joint is inserted on the valve body.

[0007] Furthermore, the outer cone welding joint and the pipe sleeve oil port joint assembly are installed on the inner cone sealing interface and the outer cone sealing interface of the tee body through a locking nut, and the straight outer wall of the tee body is provided with an external thread corresponding to the internal thread of the locking nut.

[0008] Furthermore, a sealing ring is provided between the outer cone welding joint and the inner cone surface sealing interface, and between the pipe sleeve oil port joint assembly and the outer cone surface sealing interface.

[0009] Furthermore, an O-shaped groove is provided on the outer cone surface of the outer cone welding joint for installing a sealing ring, and the outer cone surface of the outer cone welding joint corresponds to the inner cone surface of the inner cone sealing interface.

[0010] Furthermore, one end of the pipe sleeve oil port joint assembly is sleeved on the outer cone sealing interface, and the other end is provided with a rectangular sealing groove and an external threaded connection structure for directly connecting to the oil port of the device.

[0011] Furthermore, a sealing ring is provided between the pipe sleeve oil port joint assembly and the device oil port and is installed in the rectangular sealing groove.

[0012] Furthermore, the outer cone sealing interface is provided with an outer cone, a narrow cylindrical platform, a guide sealing groove, a cylindrical platform, and an external thread in sequence from the outside to the inside, and the guide sealing groove is used to install a sealing ring.

[0013] Furthermore, the inner hole of the pipe sleeve oil port joint assembly is inserted into the outer cone surface of the outer cone sealing interface, and the inner hole of the pipe sleeve oil port joint assembly is provided with a cylindrical surface and an inner cone surface in sequence from the outside to the inside. The inner cylindrical surface of the hole of the pipe sleeve oil port joint assembly is arranged on the narrow cylindrical platform, the guide sealing groove and a part of the cylindrical platform of the outer cone sealing interface, and the inner cone surface of the pipe sleeve oil port joint assembly corresponds to the outer cone surface of the outer cone sealing interface.

[0014] Furthermore, the guide sealing joint is a composite compression sealing structure of a double sealing connection combining a flange and a straight plug-in type. The lower end of the guide sealing joint is a column plug, and the upper end of the column plug is arranged on the outside of the guide sealing joint for a ring-shaped protrusion for compression sealing. The guide sealing joint is provided with a movable flange for fixing and compressing the ring-shaped protrusion.

[0015] Furthermore, the three-way body is installed on the valve body, so that the cylindrical plug is inserted into the inner hole of the valve body, and a sealing ring is arranged between the cylindrical plug and the inner hole of the valve body and between the annular protrusion and the steering valve.

[0016] The beneficial effects of the present invention are as follows: the structural feature is that the tee body is a composite structure of multiple connection modes, and its main characteristics are: the guide sealing joint at the lower end of the tee body is a composite compression sealing structure of double sealing connection combining flange and straight plug-in type, the inner cone sealing interface of the tee body is suitable for commonly used outer cone welding joints to realize double sealing and tightening connection, the outer cone sealing interface of the tee body is provided with a sealing ring and an outer cone double sealing structure, which can realize double sealing connection with a composite structure pipe sleeve oil port joint assembly with a guide cylindrical hole and inner cone surfaces of different angles, solves the problem that the internal thread locking of the oil port has no fixed connection and the tightening capacity of the oil pipe joint cannot meet its overload vibration and become loose, resulting in oil leakage at the connection, and improves the sealing performance. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] Figure 1 It is a schematic diagram of the three-dimensional structure of the present invention; Figure 2 It is a schematic diagram of the top view structure of the present invention; Figure 3 for Figure 1 Schematic diagram of the cross-section structure; Figure 4 It is a schematic diagram of the half-section structure of the tee body; Figure 5 It is a schematic diagram of the side structure of the tee body; Figure 6 It is a schematic diagram of the rear view structure of the tee body; Figure 7 It is a schematic diagram of a half-section structure of a pipe sleeve oil port joint assembly; Figure 8 It is a schematic diagram of the cross-sectional structure of the pipe sleeve oil port joint assembly; In the figure: 1. tee body; 11. outer cone; 12. narrow cylindrical platform; 13. guide sealing groove; 14. cylindrical platform; 15. external thread; 16. inner cone; 17. annular protrusion; 18. cylindrical plug; 2. pipe sleeve oil port joint assembly; 21. locking nut; 22. cylindrical surface; 3. outer cone welding joint; 4. installation oil port; 5. steering valve; 6. sealing ring; 7. flange. DETAILED DESCRIPTION

[0018] In order to make the purpose, technical solution and advantages of the present invention more clear, the present invention is further described in detail below through the accompanying drawings and embodiments. However, it should be understood that the specific embodiments described herein are only used to explain the present invention and are not intended to limit the scope of the present invention.

[0019] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as commonly understood by technicians in the technical field to which the present invention belongs. The terms used in the specification of the present invention are only for the purpose of describing specific embodiments and are not intended to limit the present invention.

[0020] like Figure 1-8 As shown, a multi-connection double-seal tee device includes: a tee body 1, a pipe sleeve oil port joint assembly 2, and an outer cone welding joint 3. The two ends of the straight-through in the tee body 1 are respectively an inner cone surface 16 sealing interface and an outer cone surface 11 sealing interface, and the end of the middle pass is a guide sealing joint. The inner cone surface 16 sealing interface, the outer cone surface 11 sealing interface, and the internal cavities of the guide sealing joint are interconnected, the end of the outer cone welding joint 3 is inserted into the inner cone surface 16 sealing interface, the pipe sleeve oil port joint assembly 2 is sleeved on the outer cone surface 11 sealing interface, and the guide sealing joint is inserted on the valve body.

[0021] The angle α1 between the taper of the inner cone surface 16 and the horizontal in the sealing interface of the inner cone surface 16 ranges from 12° to 37°, and the angle α2 between the taper of the outer cone surface 11 and the horizontal in the sealing interface of the outer cone surface 11 can be set to 60° or 74°.

[0022] The outer cone welding joint 3 and the pipe sleeve oil port joint assembly 2 are installed on the inner cone surface 16 sealing interface and the outer cone surface 11 sealing interface of the tee body 1 through the locking nut 21. The straight outer wall of the tee body 1 is provided with an outer thread 15 corresponding to the inner thread of the locking nut 21.

[0023] A sealing ring 6 is provided between the sealing interface between the outer cone welding joint 3 and the inner cone surface 16 , and between the sealing interface between the pipe sleeve oil port joint assembly 2 and the outer cone surface 11 .

[0024] An O-shaped groove is provided on the outer cone surface 11 of the outer cone welding joint 3 for installing the sealing ring 6 . The outer cone surface 11 of the outer cone welding joint 3 corresponds to the inner cone surface 16 of the sealing interface of the inner cone surface 16 .

[0025] One end of the pipe sleeve oil port joint assembly 2 is sleeved on the sealing interface of the outer cone surface 11, and the other end is provided with a rectangular sealing groove and an external thread 15 connection structure for directly connecting to the device oil port 4.

[0026] A sealing ring 6 is provided between the pipe sleeve oil port joint assembly 2 and the device oil port 4 and is installed in a rectangular sealing groove.

[0027] The sealing interface of the outer cone surface 11 is provided with an outer cone surface 11, a narrow cylindrical platform 1412, a guide sealing groove 13, a cylindrical platform 14, and an external thread 15 from the outside to the inside. The guide sealing groove 13 is used to install the sealing ring 6.

[0028] The inner hole of the pipe sleeve oil port joint assembly 2 is inserted into the outer cone surface 11 of the outer cone surface 11 sealing interface. The inner hole of the pipe sleeve oil port joint assembly 2 is provided with a cylindrical surface 22 and an inner cone surface 16 from the outside to the inside. The inner cylindrical surface 22 of the hole of the pipe sleeve oil port joint assembly 2 is arranged on the narrow cylindrical platform 1412, the guide sealing groove 13 and a part of the cylindrical platform 14 of the outer cone surface 11 sealing interface. The inner cone surface 16 of the pipe sleeve oil port joint assembly 2 corresponds to the outer cone surface 11 of the outer cone surface 11 sealing interface.

[0029] The guide sealing joint is a composite compression sealing structure of a double sealing connection combining a flange 7 and a straight plug-in type. The lower end of the guide sealing joint is a column plug 18, and the upper end of the column plug 18 is arranged on the outside of the guide sealing joint for compression sealing annular protrusion 17. The guide sealing joint is provided with a movable flange 7 for fixing and compressing the annular protrusion 17.

[0030] The three-way body 1 is installed on the valve body so that the cylindrical plug 18 is inserted into the inner hole of the valve body, and a sealing ring 6 is arranged between the cylindrical plug 18 and the inner hole of the valve body and between the annular protrusion 17 and the steering valve 5.

[0031] The above-mentioned valve body is a steering valve 5. The cylindrical plug 18 of the guiding sealing joint in the three-way body 1 is inserted into the inner hole of the steering valve 5, and the lower end surface of the annular protrusion 17 is pressed against the steering valve 5. The movable flange 7 is installed on the steering valve 5 by bolts. As the bolts are continuously tightened, the movable flange 7 further presses the annular protrusion 17 against the surface of the steering valve 5, and realizes double sealing through the cylindrical plug 18 and the inner hole of the valve body, and the annular protrusion 17 and the sealing ring 6 of the steering valve 5.

[0032] The pipe sleeve oil port joint assembly 2 is inserted into the sealing interface of the outer cone surface 11, and a seal is formed between the inner cone surface 16 of the pipe sleeve oil port joint assembly 2 and the outer cone surface 11 of the sealing interface of the outer cone surface 11. A double sealing structure is formed by the sealing ring 6 between the pipe sleeve oil port joint assembly 2 and the sealing interface of the outer cone surface 11 to achieve double sealing. After the insertion is completed, the locking nut 21 on the pipe sleeve oil port joint assembly 2 is tightened to fix the pipe sleeve oil port joint assembly 2 and the sealing interface of the outer cone surface 11.

[0033] The outer cone welding joint 3 is inserted into the sealing interface of the inner cone surface 16, and a seal is formed by the outer cone surface 11 of the outer cone welding joint 3 and the inner cone surface 16 of the sealing interface of the inner cone surface 16. Two seals are formed by the sealing ring 6 between the outer cone surface 11 of the outer cone welding joint 3 and the inner cone surface 16 of the sealing interface of the inner cone surface 16 to achieve double sealing. After the insertion is completed, the locking nut 21 on the outer cone welding joint 3 is tightened to fix the sealing interface of the outer cone welding joint 3 and the inner cone surface 16.

[0034] The other end of the pipe sleeve oil port joint assembly 2 is connected to the device oil port 4 through a threaded structure to form a seal, and the sealing ring 6 between the pipe sleeve oil port joint assembly 2 and the device oil port 4 forms a second seal to achieve double sealing.

[0035] The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. Any modification, equivalent substitution or improvement made within the spirit and principle of the present invention should be included in the protection scope of the present invention.

Claims

1. A multi-connection double-sealed three-way device, characterized in that: include: A tee body, a pipe sleeve oil port joint assembly, and an outer cone welding joint. The two ends of the straight-through in the tee body are respectively an inner cone sealing interface and an outer cone sealing interface, the end of the middle pass is a guide sealing joint, the inner cone sealing interface, the outer cone sealing interface, and the internal cavities of the guide sealing joint are interconnected, the end of the outer cone welding joint is inserted in the inner cone sealing interface, the pipe sleeve oil port joint assembly is sleeved on the outer cone sealing interface, and the guide sealing joint is inserted on the valve body.

2. A multi-connection double-sealed three-way device according to claim 1, characterized in that: The outer cone welding joint and the pipe sleeve oil port joint assembly are installed on the inner cone sealing interface and the outer cone sealing interface of the tee body through a locking nut, and the straight outer wall of the tee body is provided with an outer thread corresponding to the inner thread of the locking nut.

3. A multi-connection double-sealed three-way device according to claim 2, characterized in that: A sealing ring is arranged between the outer cone welding joint and the inner cone surface sealing interface, and between the pipe sleeve oil port joint assembly and the outer cone surface sealing interface.

4. A multi-connection double-sealed three-way device according to claim 3, characterized in that: An O-shaped groove is arranged on the outer cone surface of the outer cone welding joint for installing a sealing ring, and the outer cone surface of the outer cone welding joint corresponds to the inner cone surface of the inner cone sealing interface.

5. A multi-connection double-sealed three-way device according to claim 3, characterized in that: One end of the pipe sleeve oil port joint assembly is sleeved on the outer cone sealing interface, and the other end is provided with a rectangular sealing groove and an external thread connection structure for directly connecting to the oil port of the device.

6. A multi-connection double-sealed three-way device according to claim 5, characterized in that: A sealing ring is provided between the pipe sleeve oil port joint assembly and the device oil port and is installed in a rectangular sealing groove.

7. A multi-connection double-sealed three-way device according to claim 3, characterized in that: The outer cone sealing interface is provided with an outer cone, a narrow cylindrical platform, a guide sealing groove, a cylindrical platform, and an external thread in sequence from the outside to the inside, and the guide sealing groove is used for installing a sealing ring.

8. A multi-connection double-sealed three-way device according to claim 7, characterized in that: The inner hole of the pipe sleeve oil port joint assembly is inserted from the outer cone surface of the outer cone sealing interface. The inner hole of the pipe sleeve oil port joint assembly is provided with a cylindrical surface and an inner cone surface in sequence from the outside to the inside. The inner cylindrical surface of the hole of the pipe sleeve oil port joint assembly is arranged on the narrow cylindrical platform, the guide sealing groove and a part of the cylindrical platform of the outer cone sealing interface. The inner cone surface of the pipe sleeve oil port joint assembly corresponds to the outer cone surface of the outer cone sealing interface.

9. A multi-connection double-sealed three-way device according to claim 1, characterized in that: The guide sealing joint is a composite compression sealing structure with a double sealing connection combining a flange and a straight plug-in type. The lower end of the guide sealing joint is a column plug, and the upper end of the column plug is arranged on the outside of the guide sealing joint for a ring-shaped protrusion for compression sealing. The guide sealing joint is provided with a movable flange for fixing and compressing the ring-shaped protrusion.

10. A multi-connection double-sealed three-way device according to claim 9, characterized in that: The three-way body is installed on the valve body, so that the column plug is inserted into the inner hole of the valve body, and a sealing ring is arranged between the column plug and the inner hole of the valve body and between the annular protrusion and the steering valve.

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