Self-sealing connector for hydraulic systems

Abstract

The application relates to the technical field of hydraulic joints, and discloses a self-sealing joint for a hydraulic system, which comprises a male head and a female head, a sliding ring is slidably connected to the outer wall of the male head, and a plurality of ball bearings one are arranged on the inner wall of the through hole of the sliding ring; before the equipment is used, an external hydraulic hose needs to be connected to the end portions of the male head and the female head, then a worker holds the male head and the female head with both hands, splices the end portions together, finally twists the female head to complete the basic splicing of the joint; when the male head and the female head are spliced, air is prone to seeping in; the blocking block and the end portion of the female head are designed to be planar, and the male head, the sliding pipe and the sliding column are designed to be planar; when the cross block and the cross groove are used, the cross block and the cross groove will be in a matching state, so that the two planes are in close contact with each other, and air residue is greatly reduced.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of hydraulic joints, in particular to a self-sealing joint for a hydraulic system. BACKGROUND

[0002] The hydraulic system of an aero-engine is a key interface between the power system and the flight control system of an aircraft, and is mainly used to drive adjustable components of the engine (such as a reverse thrust device, variable stator vanes VSV, variable bleed valves VBV, etc.), and to provide pressure signal feedback for the engine control unit (ECU).

[0003] Among them, in order to make the joint more convenient to connect, the male head is usually designed to be outwardly convex, and the end of the female head is designed to be inwardly concave, which causes some gas to accumulate between the two joints during splicing. After the subsequent joint is spliced, the above gas will enter the hydraulic system together with the internal liquid. In view of the above problem, the following scheme is proposed. SUMMARY

[0004] To solve the above technical problems, the present application provides a self-sealing joint for a hydraulic system, which comprises a male head and a female head, a sliding ring is slidably connected to the outer wall of the male head, a plurality of balls are placed in the inner wall of the through hole of the sliding ring, a torsional spring is fixedly connected to the inner wall of the sliding ring, a threaded pipe is rotatably connected to the inner wall of the female head, a nut is fixedly connected to the outer wall of the threaded pipe, and further comprising:

[0005] A positioning mechanism is fixedly connected to the inner wall of the male head and is used to transmit hydraulic oil in the hydraulic system;

[0006] An auxiliary mechanism is arranged on the inner walls of the male head and the female head and is used to assist the flow of hydraulic oil;

[0007] A moving mechanism is fixedly connected to the inner wall of the female head and is used to cooperate with the worker to twist the female head after the closure is completed, so as to complete the intercommunication of the hydraulic oil;

[0008] Before the equipment is used, the external hydraulic hose needs to be connected to the ends of the male head and the female head, then the worker holds the male head and the female head with both hands, splices the ends together, and finally twists the female head to complete the basic splicing of the joint.

[0009] Preferably, the positioning mechanism comprises:

[0010] An accumulation assembly is fixedly connected to the inner wall of the male head through a flow passage;

[0011] The flow passage comprises a cavity formed in the inner wall of the male head, and a fixed plate is fixedly connected to the inner wall of the cavity;

[0012] The storage assembly includes a sliding tube that is slidably connected to the inner wall of the fixed plate;

[0013] The snap-fit ​​assembly is fixedly connected to the inner wall of the fixed plate by a pusher.

[0014] The pushing component includes a spring 1 fixedly connected to the inner wall of the fixed plate, a spring 2 fixedly connected to the inner wall of the fixed plate, and a sliding column slidably connected to the inner wall of the sliding tube.

[0015] The external hydraulic oil enters the cavity through the male end, and then reaches the position of the auxiliary mechanism through the gap between the cavity and the fixed plate.

[0016] Preferably, the auxiliary mechanism includes:

[0017] Interconnection components are located on the inner wall of the positioning mechanism;

[0018] The rotating assembly is rotatably connected to the inner wall of the female head via a positioning element;

[0019] The positioning component includes a sliding rod that is slidably connected to the inner wall of the female head, and a spring is fixedly connected to the side wall of the sliding rod;

[0020] When the moving mechanism is compressed, spring three will deform under pressure and accumulate potential energy.

[0021] Preferably, the moving mechanism includes:

[0022] The receiving component is fixedly connected to the side wall of the sliding rod by a plug;

[0023] The plugging component includes a plugging block fixedly connected to the side wall of the sliding rod, and a cross groove is provided on the side wall of the plugging block;

[0024] The sliding component is slidably connected to the inner wall of the female connector;

[0025] After the male and female connectors are connected, the end of the snap-fit ​​assembly needs to be aligned with the cross groove, and then pressure is applied to complete the splicing.

[0026] Preferably, when the male and female ends are joined together and approach each other, the end of the female end will contact the end of the sliding tube, forcing the sliding tube to slide inward along the inner wall of the fixed plate, and the spring will deform under pressure.

[0027] Preferably, the snap-fit ​​assembly includes a cross block fixedly connected to one end of the sliding post away from the second spring;

[0028] Before applying pressure, the outer wall of the cross block and the inner wall of the cross groove need to be aligned to restrict the rotation of the moving mechanism on the inner wall of the female head.

[0029] Preferably, the intercommunication assembly comprises a through hole one opened at the side wall of the male head, a through hole two opened at the side wall of the sliding tube and a U-shaped through hole opened at the inner wall of the sliding column;

[0030] The hydraulic oil accumulated in the cavity is temporarily accumulated at the inner wall of the through hole one, and the through hole one, the through hole two and the U-shaped through hole are in a dislocated state under the pushing of the spring one and the spring two.

[0031] Preferably, the rotating assembly comprises a rotating ring rotatably connected to the inner wall of the female head;

[0032] When the receiving assembly is unable to rotate due to the restriction of the cross block, the inner wall of the female head will rotate along the outer wall of the rotating ring and the plug block when the external female head is rotated.

[0033] Preferably, the receiving assembly comprises a flow-through opening opened at the inner wall of the sliding rod;

[0034] When the through hole one, the through hole two and the U-shaped through hole are in a coincident state, the hydraulic oil at the position of the through hole one will flow through the U-shaped through hole, pass through the gap between the female head and the plug block, and finally reach the position of the hose of the female head through the flow-through opening.

[0035] Preferably, the sliding assembly comprises a second rolling ball embedded in the inner wall of the female head, an inclined groove opened at the side wall of the sliding rod, and a beveled groove opened at both ends of the inclined groove;

[0036] The outer wall of the second rolling ball is in contact with the inner wall of the inclined groove, and when the second rolling ball reaches both ends of the inclined groove, the second rolling ball will reach the inner wall of the beveled groove, and the rotation of the female head is limited under the pushing of the second spring.

[0037] The present application has the following advantages:

[0038] (1) The present application is designed to solve the problem of air infiltration when the male head and the female head are spliced, the plug block and the end surface of the female head are designed to be flat, and the male head, the sliding tube and the sliding column are designed to be flat, so that the cross block and the cross groove form a matching state when in use, and the two flat surfaces are in close contact, greatly reducing the air residue.

[0039] (2) As the sliding column moves outward, one port of the U-shaped through hole will be in a coincident state with the through hole two, the hydraulic oil at the position of the through hole two will reach the contact position of the sliding tube and the female head through the other end of the U-shaped through hole, and then enter the female head through the gap between the female head and the plug block, and finally flow out through the flow-through opening and the threaded tube. Through the application of the above-mentioned assembly, only after the male head and the female head are closed, the internal hydraulic oil can flow out by twisting the female head, effectively preventing the phenomenon of internal hydraulic oil injection caused by conventional direct placement.

[0040] (3) the ball two reaches the two ends of the inclined groove, the ball two will reach the inner wall of the inclined groove, under the push of spring two, the rotation of the female head is limited, through the application of the above-mentioned assembly, after the equipment completes splicing, the influence of high-frequency vibration of the joint due to the external engine operation is effectively prevented, the female head is caused to rotate, and the joint is loosened.

[0041] (2) the present application adopts the through hole one, the through hole two and the U-shaped through hole staggered setting, the pressure is applied to the outer wall of the sliding pipe, compared with the conventional design closed by the inclination angle, the male head can bear greater pressure, and the planar design is convenient for later maintenance and cleaning. BRIEF DESCRIPTION OF DRAWINGS

[0042] In order to more clearly illustrate the technical scheme of the embodiments of the present application, the drawings needed for the embodiment description will be briefly introduced as follows. Obviously, the drawings in the following description are only some embodiments of the present application, and other drawings can be obtained by those skilled in the art without creative labor.

[0043] Figure 1 for the overall structure of the present application schematic diagram;

[0044] Figure 2 for the overall structure of the present application schematic diagram;

[0045] Figure 3 for the overall structure of the present application schematic diagram;

[0046] Figure 4 for the overall structure of the present application schematic diagram;

[0047] Figure 5 for the overall structure of the present application schematic diagram;

[0048] Figure 6 for the overall structure of the present application schematic diagram; Figure 5 for the overall structure of the present application schematic diagram;

[0049] Figure 7 for the overall structure of the present application schematic diagram;

[0050] Figure 8 for the overall structure of the present application schematic diagram;

[0051] Figure 9 for the overall structure of the present application schematic diagram.

[0052] In the drawings, the component list represented by each sign is as follows:

[0053] In the figure: 1, positioning mechanism; 11, accumulation assembly; 12, buckle assembly; 13, male head; 14, female head; 15, sliding ring; 16, ball one; 17, torsional spring; 18, threaded tube; 19, nut; 111, cavity; 112, fixed plate; 113, sliding tube; 121, spring one; 122, spring two; 123, sliding column; 124, cross block; 2, auxiliary mechanism; 21, intercommunication assembly; 22, rotating assembly; 211, through hole one; 212, through hole two; 213, U-shaped through hole; 221, sliding rod; 222, spring three; 223, rotating ring; 3, moving mechanism; 31, receiving assembly; 32, sliding assembly; 311, blocking block; 312, flow-through port; 313, cross slot; 321, ball two; 322, inclined slot; 323, inclined surface slot. DETAILED DESCRIPTION

[0054] The technical solutions in the embodiments of the present application will be clearly and completely described below with reference to the drawings in the embodiments of the present application. Obviously, the described embodiments are only part of the embodiments of the present application, rather than all the embodiments of the present application. Based on the embodiments in the present application, all other embodiments obtained by a person of ordinary skill in the art without creative work fall within the protection scope of the present application.

[0055] Embodiment one, please refer to Figure 1 Figure 5 The present application is a self-sealing joint for a hydraulic system, comprising a male head 13 and a female head 14. A sliding ring 15 is slidingly connected to the outer wall of the male head 13. A plurality of ball one 16 is placed in the inner wall of the through hole of the sliding ring 15. A torsional spring 17 is fixedly connected to the inner wall of the sliding ring 15. A threaded tube 18 is rotatably connected to the inner wall of the female head 14. A nut 19 is fixedly connected to the outer wall of the threaded tube 18. The self-sealing joint further comprises:

[0056] A positioning mechanism 1 is fixedly connected to the inner wall of the male head 13, used for transmitting hydraulic oil in the hydraulic system.

[0057] An auxiliary mechanism 2 is arranged on the inner wall of the male head 13 and the female head 14, used for assisting the flow of hydraulic oil.

[0058] A moving mechanism 3 is fixedly connected to the inner wall of the female head 14, used for cooperating with the staff to rotate the female head 14 after completing the sealing, to complete the intercommunication of the hydraulic oil.

[0059] Before the equipment is used, the external hydraulic hose needs to be connected to the end of the male head 13 and the female head 14. Then the staff holds the male head 13 and the female head 14 with both hands, splices the end together, and finally twists the female head 14 to complete the basic splicing of the joint.

[0060] The positioning mechanism 1 comprises:​

[0061] The accumulation assembly 11 is fixedly connected to the inner wall of the male head 13 through a flow passage;

[0062] The flow passage includes a cavity 111 opened in the inner wall of the male head 13, and a fixed plate 112 is fixedly connected to the inner wall of the cavity 111;

[0063] The accumulation assembly 11 includes a sliding tube 113 slidingly connected to the inner wall of the fixed plate 112;

[0064] The buckle assembly 12 is fixedly connected to the inner wall of the fixed plate 112 through a pusher;

[0065] The pusher includes a spring 121 fixedly connected to the inner wall of the fixed plate 112, a spring 122 fixedly connected to the inner wall of the fixed plate 112, and a sliding column 123 slidingly connected to the inner wall of the sliding tube 113;

[0066] The outer hydraulic oil enters the inside of the cavity 111 through the end of the male head 13, and then reaches the position of the auxiliary mechanism 2 through the gap between the cavity 111 and the fixed plate 112.

[0067] The auxiliary mechanism 2 includes:

[0068] The intercommunication assembly 21 is opened in the inner wall of the positioning mechanism 1;

[0069] The rotating assembly 22 is rotatably connected to the inner wall of the female head 14 through a positioning piece;

[0070] The positioning piece includes a sliding rod 221 slidingly connected to the inner wall of the female head 14, and a spring 222 fixedly connected to the side wall of the sliding rod 221;

[0071] When the moving mechanism 3 is pressed, the spring 222 will deform under pressure and accumulate potential energy.

[0072] The moving mechanism 3 includes:

[0073] The receiving assembly 31 is fixedly connected to the side wall of the sliding rod 221 through a plugging piece;

[0074] The plugging piece includes a plugging block 311 fixedly connected to the side wall of the sliding rod 221, and a cross slot 313 opened in the side wall of the plugging block 311;

[0075] The sliding assembly 32 is slidingly connected to the inner wall of the female head 14;

[0076] After the male head 13 and the female head 14 are connected, the end of the buckle assembly 12 needs to be matched with the cross slot 313, and then pressure is applied to complete the splicing.

[0077] Embodiment two, please refer to Figure 3 - Figure 9 The present application is a self-sealing joint for hydraulic system, based on the first embodiment, when the male head 13 and the female head 14 are assembled and close to each other, the end of the female head 14 will contact the end of the sliding pipe 113 and force the sliding pipe 113 to slide inward along the inner wall of the fixed plate 112, and the spring 121 will be compressed and deformed.

[0078] The buckle assembly 12 includes a cross block 124 fixedly connected to the end of the sliding column 123 away from the spring 122.

[0079] Wherein, in order to solve the problem of air seepage when the male head 13 and the female head 14 are assembled, the blocking block 311 and the end of the female head 14 are designed to be flat, and the male head 13, the sliding pipe 113 and the sliding column 123 are also designed to be flat, so that the cross block 124 and the cross groove 313 will form a matching state when in use, so that the two flat surfaces are in close contact with each other, greatly reducing the residual air.

[0080] The intercommunication assembly 21 includes a through hole 211 opened in the side wall of the male head 13, a through hole 212 opened in the side wall of the sliding pipe 113, and a U-shaped through hole 213 opened in the inner wall of the sliding column 123.

[0081] Wherein, when the male head 13 and the female head 14 are assembled and close to each other, the end of the female head 14 will contact the end of the sliding pipe 113 and force the sliding pipe 113 and the sliding column 123 to slide inward along the inner wall of the fixed plate 112, and after the male head 13 and the female head 14 are completely assembled, the ball 16 will enter the groove of the female head 14 at this time, and then under the push of the torsional spring 17, the sliding ring 15 will reset and cover the top of the plurality of balls 16, at this time the through hole 211 and the through hole 212 form a coincident state, and the hydraulic oil inside the through hole 211 will enter the through hole 212 and stay for a short time.

[0082] The rotating assembly 22 includes a rotating ring 223 rotatably connected to the inner wall of the female head 14.

[0083] Wherein, when the receiving assembly 31 is restricted from rotating by the cross block 124, at this time the female head 14 will rotate along the outer wall of the rotating ring 223 and the blocking block 311 when the external female head 14 is rotated.

[0084] The receiving assembly 31 includes a flow port 312 opened in the inner wall of the sliding rod 221.

[0085] Wherein, with the sliding column 123 moving outward, one port of the U-shaped through hole 213 will coincide with the through hole two 212, the hydraulic oil at the position of the through hole two 212 will pass through the other end of the U-shaped through hole 213 to the contact position of the sliding pipe 113 and the female head 14, and enter the inside of the female head 14 from the gap between the female head 14 and the blocking block 311, and finally flow outward through the flow port 312 and the threaded pipe 18. Through the application of the above components, only after the male head 13 and the female head 14 are completely closed, the internal hydraulic oil can complete the flow by twisting the female head 14, effectively preventing the phenomenon of direct placement of the internal hydraulic oil.

[0086] The sliding assembly 32 includes a ball two 321 embedded in the inner wall of the female head 14, and an inclined groove 322 is formed in the side wall of the sliding rod 221, and a beveled groove 323 is formed at both ends of the inclined groove 322.

[0087] Wherein, after the male head 13 and the female head 14 are completely spliced, the staff twists the female head 14 again, because the cross block 124 and the cross groove 313 are in a spliced state, when the female head 14 rotates, the cross block 124 will limit the rotation of the blocking block 311 and the sliding rod 221, at this stage, the spring two 122 is in a state of compression deformation, and the blocking block 311 and the female head 14 are limited by the ball one 16 and cannot move, as shown in Figure 4 At this time, the end of the blocking block 311 and the female head 14 will bear a rightward thrust, which forces the sliding rod 221 to move to the right, but is limited by the ball two 321 and cannot move. During this process, the left side of the inclined groove 322 will form a close state with the ball two 321, and the pressure on the right side of the inclined groove 322 is greater. With the female head 14 rotating counterclockwise with the ball two 321, the female head 14 will rotate counterclockwise with the ball two 321, and the bearing surface on the left side of the inclined groove 322 will be closer to the end of the female head 14. The spring two 122 will push the sliding column 123, the cross block 124, the blocking block 311 and the sliding rod 221 to move along the inner wall of the female head 14 to the direction of the rotating ring 223, so that the female head 14 and the blocking block 311 form a gap.

[0088] One specific application of the embodiment is: before using the device, the external hydraulic hose needs to be connected to the end of the male head 13 and the female head 14, then the staff holds the male head 13 and the female head 14 with both hands, splices the ends together, and finally twists the female head 14 to complete the basic splicing of the joint;

[0089] To address the issue of air infiltration when male connector 13 and female connector 14 are spliced, the blocking block 311 and the end of female connector 14 are designed to be planar, and male connector 13, sliding tube 113 and sliding column 123 are also designed to be planar. During use, cross block 124 and cross groove 313 will form a matching state, so that the two planes fit together, greatly reducing air residue.

[0090] When the ends of the male head 13 and the female head 14 are joined together and approach each other, the end of the female head 14 will contact the end of the sliding tube 113, forcing the sliding tube 113 and the sliding column 123 to slide inward along the inner wall of the fixed plate 112. After the male head 13 and the female head 14 are fully joined, the first ball 16 will enter the inner wall of the groove on the outer wall of the female head 14. Then, under the push of the torsion spring 17, the sliding ring 15 will reset and cover the top of the multiple balls 16. At this time, the first through hole 211 and the second through hole 212 will overlap. The hydraulic oil inside the first through hole 211 will enter the second through hole 212 and stay briefly.

[0091] After the male connector 13 and female connector 14 are assembled, the worker twists the female connector 14 again. Since the cross block 124 and the cross groove 313 are engaged, when the female connector 14 rotates, the cross block 124 restricts the rotation of the blocking block 311 and the sliding rod 221. At this stage, the second spring 122 is under compression deformation, and the blocking block 311 and the female connector 14 are restricted from moving by the first ball 16. Figure 4 As shown, at this time, the end of the blocking block 311 and the female head 14 will be subjected to a rightward thrust. This thrust forces the sliding rod 221 to move to the right through the blocking block 311, but it cannot move due to the restriction of the second ball 321. During this process, the inclined groove 322 will be in close contact with the second ball 321 on the left side, and the pressure is greater than that on the right side of the inclined groove 322. As the female head 14 drives the second ball 321 to rotate counterclockwise, the female head 14 will drive the second ball 321 to rotate counterclockwise synchronously. The closer the bearing surface on the left side of the inclined groove 322 is to the end of the female head 14, the more the spring 122 will push the sliding column 123, the cross block 124, the blocking block 311 and the sliding rod 221 to move along the inner wall of the female head 14 toward the rotating ring 223, so that the female head 14 and the blocking block 311 form a gap.

[0092] Simultaneously, as the sliding pin 123 moves outward, one end of the U-shaped through hole 213 will overlap with the second through hole 212. The hydraulic oil at the position of the second through hole 212 will reach the contact position of the sliding tube 113 and the female head 14 through the other end of the U-shaped through hole 213. Figure 9As shown in the middle G path, the hydraulic oil enters the inside of the female head 14 from the gap between the female head 14 and the blocking block 311, and finally flows out through the flow-through port 312 and the threaded tube 18. Through the application of the above components, only when the male head 13 and the female head 14 are completely closed, the internal hydraulic oil can flow out by twisting the female head 14, effectively preventing the phenomenon of direct placement of the conventional internal hydraulic oil.

[0093] Wherein, when the ball 321 reaches both ends of the inclined groove 322, the ball 321 will enter the inner wall of the inclined groove 323 under the push of the spring 122, limiting the rotation of the female head 14, and at this time, since the ball 321 and the inclined groove 323 are in close contact, the inclined groove 323 limits the rotation of the female head 14 through the ball 321. Through the application of the above components, after the equipment is completed, it effectively prevents the joint from being affected by high-frequency vibration when the external engine is running, causing the female head 14 to rotate and the joint to loosen.

[0094] The preferred embodiments of the application disclosed above are only used to help explain the application. The preferred embodiments do not describe all the details and do not limit the application to the specific embodiments described. Obviously, many modifications and changes can be made according to the content of the specification. The specification selects and describes these embodiments in order to better explain the principles and practical applications of the application, so that those skilled in the art can well understand and utilize the application. The application is limited only by the claims and their full scope and equivalents.

Claims

1. A self-sealing connector for hydraulic systems, comprising a male head (13) and a female head (14), a sliding ring (15) being slidably connected to the outer wall of the male head (13), a plurality of ball bearings (16) being placed on the inner wall of the through hole of the sliding ring (15), a torsion spring (17) being fixedly connected to the inner wall of the sliding ring (15), a threaded tube (18) being rotatably connected to the inner wall of the female head (14), and a nut (19) being fixedly connected to the outer wall of the threaded tube (18), characterized in that, Also include: Positioning mechanism (1), the positioning mechanism (1) is fixedly connected at the inner wall of the male head (13), for transmission of hydraulic oil in the hydraulic system; Auxiliary mechanism (2), the auxiliary mechanism (2) is arranged in the inner wall of the male head (13) and the female head (14), for assisting the flow of hydraulic oil; Moving mechanism (3), the moving mechanism (3) is fixedly connected at the inner wall of the female head (14), for cooperating with the staff to twist the female head (14) after completing the closure, to complete the mutual communication of hydraulic oil; Wherein, before the equipment is used, the external hydraulic hose needs to be connected with the end of the male head (13) and the female head (14), then the staff holds the male head (13) and the female head (14) with both hands, splices the end together, finally twists the female head (14), completes the basic splicing of the joint; The positioning mechanism (1) comprises: Accumulation assembly (11), the accumulation assembly (11) is fixedly connected at the inner wall of the male head (13) through the flow element; The flow element comprises a cavity (111) opened in the inner wall of the male head (13), and a fixed plate (112) is fixedly connected at the inner wall of the cavity (111); The accumulation assembly (11) comprises a sliding tube (113) slidingly connected at the inner wall of the fixed plate (112); The buckle assembly (12) is fixedly connected at the inner wall of the fixed plate (112) through the push element; The push element comprises a spring one (121) fixedly connected at the inner wall of the fixed plate (112), a spring two (122) fixedly connected at the inner wall of the fixed plate (112), and a sliding column (123) slidingly connected at the inner wall of the sliding tube (113); Wherein, the external hydraulic oil enters the inside of the cavity (111) through the end of the male head (13), then reaches the position of the auxiliary mechanism (2) through the gap between the cavity (111) and the fixed plate (112); The auxiliary mechanism (2) comprises: Intercommunication assembly (21), the intercommunication assembly (21) is opened at the inner wall of the positioning mechanism (1); Rotating assembly (22), the rotating assembly (22) is rotatably connected at the inner wall of the female head (14) through the positioning element; The positioning element comprises a sliding rod (221) slidingly connected at the inner wall of the female head (14), and a spring three (222) fixedly connected at the sidewall of the sliding rod (221); The moving mechanism (3) comprises: Receiving assembly (31), the receiving assembly (31) is fixedly connected at the sidewall of the sliding rod (221) through the plugging element; The plugging element comprises a plugging block (311) fixedly connected at the sidewall of the sliding rod (221), and a cross slot (313) opened at the sidewall of the plugging block (311); Sliding assembly (32), the sliding assembly (32) is slidingly connected at the inner wall of the female head (14); Wherein, after the male head (13) and the female head (14) are butt jointed, the end of the buckle assembly (12) needs to be matched with the cross slot (313), then the splicing is completed by pressing again; The buckle assembly (12) comprises a cross block (124) fixedly connected at the end of the sliding column (123) away from the second spring (122); Wherein, before pressing, the outer wall of the cross block (124) and the inner wall of the cross groove (313) are in a state of fitting, and the cross block (124) and the cross groove (313) limit the rotation of the moving mechanism (3) in the inner wall of the female head (14); The intercommunication assembly (21) comprises a through hole one (211) formed in the side wall of the male head (13), a through hole two (212) formed in the side wall of the sliding pipe (113), and a U-shaped through hole (213) formed in the inner wall of the sliding column (123); Wherein, the hydraulic oil accumulated in the cavity (111) will be temporarily accumulated in the inner wall of the through hole one (211), and in the normal state, the through hole one (211), the through hole two (212) and the U-shaped through hole (213) are in a dislocation state under the pushing of the first spring (121) and the second spring (122); The rotating assembly (22) comprises a rotating ring (223) rotatably connected in the inner wall of the female head (14); Wherein, when the receiving assembly (31) is limited by the cross block (124) and cannot rotate, at this time, when the external female head (14) rotates, the inner wall of the female head (14) will rotate along the outer wall of the rotating ring (223) and the blocking block (311); The sliding assembly (32) comprises a second ball (321) embedded in the inner wall of the female head (14), an inclined groove (322) formed in the side wall of the sliding rod (221), and a beveled groove (323) formed at both ends of the inclined groove (322); Wherein, the outer wall of the second ball (321) is in contact with the inner wall of the inclined groove (322), when the second ball (321) reaches both ends of the inclined groove (322), the second ball (321) will reach the inner wall of the beveled groove (323), and under the pushing of the second spring (122), the rotation of the female head (14) is limited.

2. The self-sealing connector for hydraulic systems according to claim 1, characterized in that: When the male head (13) and the female head (14) are combined at the end and close to each other, the end of the female head (14) will contact the end of the sliding pipe (113) and force the sliding pipe (113) to slide inward along the inner wall of the fixed plate (112), and the first spring (121) is compressed to deform.

3. A self-sealing connector for use in a hydraulic system according to claim 2, wherein: The receiving assembly (31) comprises a flow port (312) formed in the inner wall of the sliding rod (221); Wherein, when the through hole one (211), the through hole two (212) and the U-shaped through hole (213) are in a coincident state, the hydraulic oil at the position of the through hole one (211) will flow through the U-shaped through hole (213), and through the female head (14), the blocking block (311) and the flow port (312) to finally reach the position of the hose of the female head (14).

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