A high-pressure oil pipe joint structure

Abstract

The application provides a high-pressure oil pipe interface connecting structure, and relates to the technical field of hydraulic pressure. The high-pressure oil pipe interface connecting structure comprises a connector and an oil pipe nozzle. The oil pipe nozzle is tightly connected to the connector. The contact surfaces of the oil pipe nozzle and the connector are provided with tapered surfaces. The taper of the tapered surface of the connector is smaller than that of the tapered surface of the oil pipe nozzle. The connector is provided with a locking mechanism which is movably connected to the oil pipe nozzle. In the application, the oil pipe nozzle with a small taper is tightly connected to the connector with a large taper, so that linear sealing can be ensured, and the gap on the high-pressure side can be effectively reduced, thereby avoiding the situation that the oil pipe nozzle is pushed away due to excessively high oil pressure, and the sealing performance under high pressure is improved.

Description

Technical Field

[0001] This application relates to the field of hydraulic technology, and more specifically, to a high-pressure oil pipe interface connection structure. Background Technology

[0002] The high-pressure fuel line connects to the injector connector via a fuel line nozzle. A pipe fitting nut is used to press the fuel line nozzle tightly against the injector connector for a seal. To improve the fit, a conical fit is typically used. The conical surface of the fuel line nozzle is usually machined with a certain curvature. Although this increases the contact area, a small gap is formed near the high-pressure side of the contact surface, as shown in the attached figure. Figure 3 and attached Figure 4 As shown, when the internal oil pressure is too high, the oil pressure will push from this gap to both sides, thereby pushing the interface away from the connector and causing oil pressure leakage. Summary of the Invention

[0003] To overcome the shortcomings of the existing technology, this application provides a high-pressure oil pipe interface connection structure that can solve the problems mentioned in the background art.

[0004] The technical solution adopted by this application embodiment to solve its technical problem is: a high-pressure oil pipe interface connection structure, including a connector and an oil pipe nozzle, the oil pipe nozzle is pressed against the connector, the mating surfaces of the oil pipe nozzle and the connector are both tapered, the taper of the connector is smaller than the taper of the oil pipe nozzle, and a locking mechanism is provided on the connector to be movably pressed against the oil pipe nozzle.

[0005] In one specific implementation, the connector includes a socket with a conical surface inside, and the oil nozzle is inserted into the socket.

[0006] In one specific implementation, a pry bar is elastically hinged to the socket, a stop ring is fixedly connected around the oil pipe nozzle, the short end of the pry bar is movably pressed against the stop ring, and the locking mechanism is pressed against the long end of the pry bar.

[0007] In one specific implementation, a torsion spring is provided on the hinge shaft of the crowbar.

[0008] In one specific implementation, the locking mechanism includes a sleeve that is movably connected to the socket, and the inner wall of the sleeve is movably pressed against the long end of the pry bar.

[0009] In one specific implementation, the inner wall of the sleeve is provided with an inclined surface, and the sleeve abuts against the long end of the crowbar through the inclined surface.

[0010] In one specific implementation, the locking mechanism further includes a nut that is screwed to the socket and is movably pressed against the end face of the sleeve, the outer circumference of which is hexagonal.

[0011] In one specific implementation, a spring washer is provided between the sleeve and the nut.

[0012] The advantages of the embodiments of this application are:

[0013] By using a small-tapered oil nozzle to make tight contact with a large-tapered connector, a linear seal can be ensured, and gaps can be effectively reduced on the high-pressure side. This prevents the oil nozzle from being pushed away by excessive oil pressure and improves the sealing performance under high pressure. Attached Figure Description

[0014] Figure 1 A cross-sectional schematic diagram of the high-pressure oil pipe interface connection structure provided for the embodiments of this application;

[0015] Figure 2 Provided for the implementation of this application Figure 1 A magnified view of the structure at point A in the middle;

[0016] Figure 3 This is a schematic diagram illustrating the connection relationship between the connector and the oil nozzle in the prior art;

[0017] Figure 4 for Figure 3 A magnified schematic diagram of the structure at point B in the middle;

[0018] Figure 5 A first-view structural schematic diagram of the high-pressure oil pipe interface connection structure provided for the embodiments of this application;

[0019] Figure 6 A second-view structural schematic diagram of the high-pressure oil pipe interface connection structure provided in the embodiments of this application;

[0020] Figure 7 An exploded view of the high-pressure oil pipe interface connection structure provided in the embodiments of this application.

[0021] In the diagram: 10-Connector; 11-Socket; 12-Crowbar; 13-Torsion Spring; 20-Oil Nozzle; 30-Locking Mechanism; 31-Sleeve; 32-Nut; 33-Spring Washer; 40-Abutment Ring. Detailed Implementation

[0022] The technical solution in this application embodiment is to solve the problems mentioned in the background art above, and the overall idea is as follows:

[0023] Please see Figures 1-6A high-pressure oil pipe interface connection structure includes a connector 10 and an oil pipe nozzle 20. The oil pipe nozzle 20 abuts against the connector 10. Both the contact surfaces of the oil pipe nozzle 20 and the connector 10 are tapered, with the taper of the connector 10 being smaller than that of the oil pipe nozzle 20. A locking mechanism 30 is provided on the connector 10 to movably abut against the oil pipe nozzle 20. The use of the smaller taper of the oil pipe nozzle 20 in close contact with the larger taper of the connector 10 ensures a linear seal and effectively reduces the occurrence of gaps on the high-pressure side. This prevents the oil pipe nozzle 20 from being pushed away by excessive oil pressure, thus improving sealing performance under high-pressure conditions.

[0024] Please see Figures 1-6 The connector 10 includes a socket 11, which has a conical surface. The oil nozzle 20 is inserted into the socket 11. Here, the oil nozzle 20 is inserted into the socket 11 to form an initial connection, and a seal is formed by the contact between the conical surface of the oil nozzle 20 and the conical surface of the socket 11.

[0025] Please see Figures 1-6 A pry bar 12 is elastically hinged to the socket 11, and a retaining ring 40 is fixedly connected to the oil nozzle 20 around its circumference. The short end of the pry bar 12 is movably pressed against the retaining ring 40, and the locking mechanism 30 is pressed against the long end of the pry bar 12. Here, the pry bar 12 is used to press the oil nozzle 20 against the inside of the socket 11, and the lever effect generated by the locking mechanism 30 and the pry bar 12 is used to further press the oil nozzle 20 against the socket 11 to improve the seal.

[0026] Please see Figures 1-6 A torsion spring 13 is provided on the hinge shaft of the pry bar 12. Here, the torsion spring 13 is used to keep the long end of the pry bar 12 in a state of pressing against the locking mechanism 30, so as to facilitate the insertion of the oil nozzle 20.

[0027] Please see Figures 1-6 The locking mechanism 30 includes a sleeve 31, which is movably connected to the socket 11. The inner wall of the sleeve 31 is movably pressed against the long end of the pry bar 12. Here, the sleeve 31 applies a pressing force to the long end of the pry bar 12, and the torque of the pry bar 12 increases, thus applying an axial pressing force to the oil nozzle 20.

[0028] Please see Figures 1-6 The inner wall of the sleeve 31 is provided with an inclined surface, and the sleeve 31 is pressed against the long end of the pry bar 12 through the inclined surface. Here, when the sleeve 31 moves downward, it will press the pry bar 12 inward, thereby increasing the pressing force.

[0029] Please see Figures 1-6The locking mechanism 30 also includes a nut 32, which is screwed to the socket 11. The nut 32 is movably pressed against the end face of the sleeve 31, and the outer circle of the sleeve 31 is hexagonal. Here, the nut 32 is used to press the sleeve 31 against the socket, and the axial tightening force of the nut 32 is amplified by the pry bar 12, which further increases the axial pressing force on the oil pipe nozzle 20.

[0030] Please see Figures 1-6 A spring washer 33 is provided between the sleeve 31 and the nut 32. Here, the spring washer 33 is used to maintain the clamping force and reduce the impact of the loosening of the nut 32 on the clamping force.

[0031] When using this application: Insert the oil nozzle 20 into the socket 11, move the sleeve 31 downwards, and bring the four pry bars 12 together inwards. The short ends of the pry bars 12 abut against the retaining ring 40, thereby pressing the oil nozzle 20 axially upwards, so that the oil nozzle 20 is pressed against the conical surface of the socket 11. Then, the nut 32 continues to press the sleeve 31 downwards through the spring washer 33. The inclined surface of the inner wall of the sleeve 31 causes the long ends of the pry bars 12 to move further inwards, while the short ends of the pry bars 12 further press the oil nozzle 20 upwards. By utilizing the leverage effect of the pry bars 12, the pressing force between the oil nozzle 20 and the socket 11 is increased, thereby improving the sealing performance. Since the conical surface of the oil nozzle 20 has a smaller taper, the contact surface between the oil nozzle 20 and the socket 11 is a ring-shaped linear contact. Moreover, this contact position is close to the internal high-pressure oil, so the gap is located on the outside of the contact surface and will not be affected by the internal high-pressure oil, further improving the sealing performance.

[0032] In summary, by using the small-tapered oil nozzle 20 to make tight contact with the large-tapered connector 10, a linear seal can be ensured, and gaps can be effectively reduced on the high-pressure side. This avoids the oil nozzle 20 being pushed away by excessive oil pressure, thus improving the sealing performance under high pressure.

[0033] Finally, it should be noted that the above embodiments are merely examples for clearly illustrating the present invention and are not intended to limit the implementation. Those skilled in the art will recognize that other variations or modifications can be made based on the above description. It is neither necessary nor possible to exhaustively list all possible implementations. However, obvious variations or modifications derived therefrom are still within the scope of protection of this invention.

Claims

1. A high-pressure oil pipe interface connection structure, comprising a connector and an oil pipe nozzle, wherein the oil pipe nozzle abuts against the connector, and both the contact surfaces of the oil pipe nozzle and the connector are tapered surfaces, characterized in that, The taper of the connector is smaller than that of the oil nozzle, and the connector is provided with a locking mechanism that is movably pressed against the oil nozzle; The connector includes a socket with a conical surface inside, and the oil nozzle is inserted into the socket. A pry bar is elastically hinged to the socket, and a retaining ring is fixedly connected around the oil pipe nozzle. The short end of the pry bar is movably pressed against the retaining ring, and the locking mechanism is pressed against the long end of the pry bar. A torsion spring is provided on the hinge shaft of the crowbar; The locking mechanism includes a sleeve, which is movably connected to the socket, and the inner wall of the sleeve is movably pressed against the long end of the pry bar; The inner wall of the sleeve is provided with an inclined surface, and the sleeve is pressed against the long end of the crowbar through the inclined surface.

2. The high-pressure oil pipe interface connection structure as described in claim 1, characterized in that, The locking mechanism also includes a nut, which is screwed to the socket and is movably pressed against the end face of the sleeve. The outer circle of the sleeve is hexagonal.

3. The high-pressure oil pipe interface connection structure as described in claim 2, characterized in that, A spring washer is provided between the sleeve and the nut.

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