Self-locking and self-sealing quick connector

Abstract

The invention discloses a self-locking self-sealing quick connector which comprises a quick connector male head and a quick connector female head, the quick connector male head comprises a male head body and a male head valve element, one end of the male head body is a male head connecting end, the other end of the male head body is a socket end, and the male head valve element is arranged in the male head body and is in coaxial elastic sliding connection with the male head body; when the quick connector male head is in an initial state, the male head valve element is sealed at the spigot end, and the quick connector female head comprises a female head body, a female head connector body and a crankshaft. Through the linkage design of the female head self-locking handle, the crankshaft, the connecting rod and the female head jacking block, and the locking positioning structure for limiting the rotation range of the crankshaft is arranged on the female head self-locking handle, connection and disconnection of the quick connector can be completed through single-person operation, and an operator only needs to buckle a trigger and rotate the female head self-locking handle, so that the quick connector can be quickly connected and disconnected. The male head valve seat can be pushed through the female head jacking block to complete communication of pipelines, the operation process is greatly simplified, and meanwhile the operation difficulty and strength are reduced.

Description

Technical Field

[0001] The invention relates to the technical field of pipeline connection, in particular to a self-locking and self-sealing quick connector. Background Art

[0002] In the process of transmitting fluids such as liquids and gases, quick connectors are often used to achieve quick connection and disconnection of pipelines, which greatly improves work efficiency. The Chinese patent with announcement number CN221922440U discloses a self-locking anti-disconnection closed quick connector, which has the characteristics of self-locking connection, triggering the anti-disconnection device before opening the valve, and automatic closure after accidental disconnection, but it has the following defects: the operation process is complicated, the operation difficulty and strength are relatively large, and it is difficult to complete it alone. The front valve core in the female end needs to realize the sealing function, so the spring force of the compression spring pressing the front valve core will be large, otherwise the sealing effect is not good. When the female end is put on the male end connector for docking, one person needs to use both hands to overcome the elastic force of the compression spring to push the female end to the bottom. At this time, one person needs to turn the locking handle so that the cam of the locking handle clamps the concave interface of the male end connector, and after locking the locking handle, the first person can release both hands. Therefore, it is necessary to provide a self-locking and self-closing quick connector that is simple to operate and lightweight to solve the problems existing in the above-mentioned prior art. Summary of the invention

[0003] The purpose of the present invention is to provide a self-locking and self-sealing quick connector, aiming to simplify the operation process, reduce the difficulty and intensity of operation, and ensure good sealing effect and self-locking performance.

[0004] To achieve the above object, the present invention provides the following technical solutions: A self-locking and self-sealing quick connector, comprising a quick connector male and a quick connector female, the quick connector male comprising a male body and a male valve core, one end of the male body being a male connection end, and the other end being a socket end, the male valve core being arranged in the male body and being coaxially elastically slidably connected with the male body, the male valve core being sealed at the socket end when the quick connector male is in an initial state, the quick connector female comprising a female body, a female connector body and a crankshaft, one end of the female body being a female connection end, and the other end being coaxially fixedly connected with the female connector body, the crankshaft being arranged in the middle of the female body and being perpendicular to the axis of the female body, one end of the crankshaft extending into the female body, and the other end extending out of the female body and being rotatably sealed and connected with the female body, the crankshaft extending end A female self-locking handle is fixedly connected, and the female self-locking handle is provided with a locking positioning structure that limits the rotation range of the crankshaft. The crankshaft is located in the female body and is hinged with a connecting rod, which is perpendicular to the crankshaft. A female top block is hinged at the other end of the connecting rod. The female top block reciprocates axially in the female joint body under the action of the connecting rod. When the female top block moves to the extreme position in the direction of the crankshaft, it is sealed with the female joint body. This is the initial state of the quick connector female. After the female top block moves a certain distance in the direction of the female joint body, it disengages the seal from the female joint body. The female joint body is provided with a quick-connect self-locking unit. After the quick connector male head and the quick connector female head are connected, the quick-connect self-locking unit can lock the quick connector male head on the quick connector female head.

[0005] Furthermore, a fixing frame is fixedly arranged in the male head body, a push rod sleeve is fixedly arranged in the fixing frame, the end face of the push rod sleeve is closely attached to a spring cushion seat, one end of the male head valve core is a male head push rod, and the other end is a male head valve seat, the unend of the male head push rod is matched and extends into the push rod sleeve, the male head push rod sleeve is provided with a male head spring, one end of the male head spring is flush with the spring cushion seat, and the other end is flush with the male head valve seat, the male head valve seat is provided with an outer arc-shaped cone surface, the arc-shaped cone surface is installed with a first sealing ring, the socket end is provided with an inner arc-shaped cone surface matching the outer arc-shaped cone surface, and the male head valve seat is sealed with the socket end through the first sealing ring under the action of the male head spring.

[0006] Furthermore, the male head body is fixedly provided with a positioning plate, a through hole is opened in the middle of the positioning plate, three arc protrusions are evenly arranged on the inner wall of the through hole, the arc protrusions are opened with positioning holes, and the fixing frame is evenly fixedly provided with three brackets, and a positioning boss is fixedly provided on the outward side of the end of the bracket, and the fixing frame is inserted into the positioning hole by matching the positioning boss and is fixedly connected to the male head body by the compression action of the male head spring.

[0007] Furthermore, an inner hole boss is fixedly provided on the outer wall of the female head body, a bearing hole is opened on the inner wall of the female head body, the inner hole boss is coaxial with the bearing hole, a positioning retaining ring is fixedly provided on the middle part of the crankshaft, one end of the crankshaft extends into the bearing hole, and the other end extends out of the inner hole boss, a female head sleeve and a crankshaft cover are mounted on the crankshaft, the female head sleeve is against the positioning retaining ring, the crankshaft cover is pressed on the female head sleeve and is fixedly connected with the inner hole boss through threads, a second sealing ring for sealing the crankshaft is installed between the female head sleeve and the crankshaft cover, and a third sealing ring for sealing with the inner hole boss is installed on the crankshaft cover.

[0008] Furthermore, the locking and positioning structure includes a trigger arranged on the female self-locking handle, a handle positioning block and two positioning blocks arranged on the inner hole boss, the positioning blocks are fixedly arranged on both sides of the outer wall of the inner hole boss along the axial direction of the female body and are flush with the top surface of the inner hole boss, the positioning blocks are located on the same side of the axis of the female body, the female self-locking handle includes a handle cover and a handle that are fixedly connected, the handle cover is fixedly connected to the protruding end of the crankshaft by a screw, the trigger is hinged to the bottom of the handle near the connection with the handle cover by a trigger pin, the trigger is installed with a torsion spring, a trigger positioning block is arranged at one end of the trigger, the trigger positioning block is close to the inner hole boss under the action of the torsion spring, the handle positioning block is fixedly arranged on the handle cover and is located opposite to the trigger positioning block, and the female self-locking handle can rotate within a range of 180 degrees under the restriction of the handle positioning block and the positioning block.

[0009] Furthermore, the crankshaft is fixedly connected with two first hinge plates, the first hinge plates are perpendicular to the crankshaft, the female head top block adopts a piston structure and two second hinge plates are fixedly arranged in the middle of the tail end, the connecting rod is crank-shaped, the inner arc of the bending part of the connecting rod matches the crankshaft diameter, and the two ends of the connecting rod are respectively hinged to the first hinge plate and the second hinge plate through pins.

[0010] Furthermore, one end of the female connector body is a socket end, and the other end is a threaded end. A fourth sealing ring for sealing with the socket end of the male body is provided at the connection between the socket end and the threaded end. The threaded end is threadedly fixedly connected to the female body and a fifth sealing ring is installed between the threaded end and the female body. A sealing ring groove is provided in the inner hole of the threaded end and a sixth sealing ring for sealing the female top block is installed in the sealing ring groove.

[0011] Furthermore, the quick-connect self-locking unit includes a concave locking groove, a cam window and two quick-connect self-locking handles, the concave locking groove is opened on the male head body and is located behind the socket end, the cam windows are two in number and are symmetrically opened on the socket end of the female head connector body, the quick-connect self-locking handles are symmetrically hinged to the side wall of the female head connector body through hinge pins, the quick-connect self-locking handles are provided with cams, the cams correspond to the cam windows, after the socket end is inserted into the socket end, the concave locking groove corresponds to the cam window, and the cam is stuck in the concave locking groove by rotating the quick-connect self-locking handle to lock the male head of the quick connector on the female head of the quick connector.

[0012] Furthermore, a male sealing ring is installed at the male connecting end of the male main body, and a female sealing ring is installed at the female connecting end of the female main body.

[0013] Compared with the prior art, the present invention has the following beneficial effects: 1. The present invention adopts the linkage design of the female self-locking handle, crankshaft, connecting rod and female top block, and a locking positioning structure for limiting the rotation range of the crankshaft is provided on the female self-locking handle, so that the connection and disconnection of the quick connector can be completed by a single person. The operator only needs to hold the trigger and turn the female self-locking handle to push the male valve seat through the female top block to complete the connection of the pipeline, which greatly simplifies the operation process, reduces the difficulty and intensity of operation, and significantly improves the user experience and satisfaction.

[0014] 2. The quick connector of the present invention has a reasonable design and a compact structure. It is suitable for connecting various fluid transmission pipelines. After disconnection, the quick connector male head and the quick connector female head have self-sealing properties and do not require additional valves. This not only facilitates the installation and disassembly of the quick connector, improves work efficiency, but also saves costs. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] Figure 1 It is the appearance diagram of the present invention; Figure 2 This is a cross-sectional view of the male quick connector; Figure 3 This is the main body view of the male connector; Figure 4 is the fixed frame view; Figure 5 Cutaway view of the quick connector female Figure 1 ; Figure 6 Cutaway view of the quick connector female Figure 2 ; Figure 7 This is the main view of the female head; Figure 8 This is the crankshaft view; Fig. 9 The coupling state of the present invention is cut away Figure 1 ; Fig.10 The coupling state of the present invention is cut away Figure 2 ; In the figure: 01-quick connector male, 02-quick connector female, 03-male body, 0301-male connection end, 0302-socket end, 0303-concave lock groove, 0304-positioning plate, 0305-arc protrusion, 0306-positioning hole, 04-fixing frame, 0401-bracket, 0402-positioning boss, 05-rod sleeve, 06-male valve core, 0601-male push rod, 0602-male valve seat, 07-spring cushion seat, 08-male spring, 09-male sealing ring, 10-first sealing ring, 11-female body, 1101-female connection end, 1102-inner hole boss, 1103-bearing hole, 1104-positioning block, 12-female connector body, 1201-socket end, 12 02-threaded end, 1203-cam window, 13-crankshaft, 1301-positioning retaining ring, 1302-first hinge plate, 14-female self-locking handle, 1401-handle cover, 1402-handle, 1403-trigger pin, 1404-trigger, 1405-trigger positioning block, 1406-torsion spring, 1407-handle positioning block, 15-screw, 16-crankshaft cover, 17-second sealing ring, 18-female shaft sleeve, 19-third sealing ring, 20-connecting rod, 21-female top block, 2101-second hinge plate, 22-pin shaft, 23-fourth sealing ring, 24-fifth sealing ring, 25-sixth sealing ring, 26-quick-connect self-locking handle, 2601-cam, 27-hinge pin, 28-female sealing ring. DETAILED DESCRIPTION

[0016] The present invention is described in detail below with reference to the accompanying drawings and specific embodiments.

[0017] See also Figure 1-Figure 10 , an embodiment provided by the present invention: A self-locking and self-sealing quick connector, comprising a quick connector male 01 and a quick connector female 02, wherein the quick connector male 01 comprises a male body 03 and a male valve core 06, wherein one end of the male body 03 is a male connection end 0301, and the other end is a socket end 0302, wherein the male valve core 06 is arranged in the male body 03 and is coaxially elastically slidably connected with the male body 03, wherein the male valve core 06 is sealed at the socket end 0302 when the quick connector male 01 is in an initial state, wherein the quick connector female 02 comprises a female body 11, a female connector body 12 and a crankshaft 13, wherein one end of the female body 11 is a female connection end 1101, and the other end is coaxially fixedly connected with the female connector body 12, wherein the crankshaft 13 is arranged in the middle of the female body 11 and is perpendicular to the axis of the female body 11, wherein one end of the crankshaft 13 extends into the female body 11, and the other end extends out of the female body 11 and is rotatably and sealedly connected with the female body 11 The protruding end of the crankshaft 13 is fixedly connected to a female self-locking handle 14, and the female self-locking handle 14 is provided with a locking and positioning structure that limits the rotation range of the crankshaft 13. The crankshaft 13 is located in the female main body 11 and is hinged with a connecting rod 20. The connecting rod 20 is perpendicular to the crankshaft 13, and the other end of the connecting rod 20 is hinged with a female top block 21. The female top block 21 moves axially reciprocatingly in the female joint body 12 under the action of the connecting rod 20. When the female top block 21 moves to the extreme position in the direction of the crankshaft 13, it is sealed with the female joint body 12. This is the initial state of the quick connector female 02. After the female top block 21 moves a certain distance in the direction of the female joint body 12, it disengages the seal from the female joint body 12. The female joint body 12 is provided with a quick-connect self-locking unit. After the quick connector male 01 and the quick connector female 02 are docked, the quick-connect self-locking unit can lock the quick connector male 01 on the quick connector female 02.

[0018] Among them, a fixing frame 04 is fixedly arranged in the male head body 03, a push rod sleeve 05 is fixedly arranged in the fixing frame 04, the end face of the push rod sleeve 05 is close to the spring cushion seat 07, one end of the male head valve core 06 is the male head push rod 0601, and the other end is the male head valve seat 0602, the end of the male head push rod 0601 is matched and extended into the push rod sleeve 05, the male head push rod 0601 is sleeved with a male head spring 08, one end of the male head spring 08 is flush with the spring cushion seat 07, and the other end is flush with the male head valve seat 0602, the male head valve seat 0602 is provided with an outer arc-shaped cone surface, and the arc-shaped cone surface is installed with a first sealing ring 10, the socket end 0302 is provided with an inner arc-shaped cone surface matching the outer arc-shaped cone surface, and the male head valve seat 0602 is sealed with the socket end 0302 through the first sealing ring 10 under the action of the male head spring 08, so that the quick connector male head 01 has a self-sealing function in a free state.

[0019] Among them, the male head body 03 is fixedly provided with a positioning plate 0304, a through hole is opened in the middle of the positioning plate 0304, and three arc protrusions 0305 are evenly arranged on the inner wall of the through hole. The arc protrusions are provided with positioning holes 0306, so that the diameter of the through hole is larger than the pitch circle diameter of the positioning hole 0306, so that the fixing frame 04 is convenient for entering the through hole from the male head connection end 0301 and then being installed on the positioning plate 0304. The fixing frame 04 is evenly fixedly provided with three brackets 0401, and a positioning boss 0402 is fixedly provided on the outward side of the end of the bracket 0401. The fixing frame 04 is inserted into the positioning hole 0306 through the matching positioning boss 0402 and is fixedly connected to the male head body 03 through the pressing action of the male head spring 08.

[0020] Among them, an inner hole boss 1102 is fixedly provided on the outer wall of the female head body 11, and a bearing hole 1103 is opened on the inner wall of the female head body 11, and the inner hole boss 1102 is coaxial with the bearing hole 1103. A positioning retaining ring 1301 is fixedly provided in the middle of the crankshaft 13, one end of the crankshaft 13 extends into the bearing hole 1103, and the other end extends out of the inner hole boss 1102. A female head sleeve 18 and a crankshaft cover 16 are mounted on the crankshaft 13, the female head sleeve 18 is close to the positioning retaining ring 1301, the crankshaft cover 16 is pressed on the female head sleeve 18 and is threadedly fixedly connected with the inner hole boss 1102, a second sealing ring 17 for sealing the crankshaft 13 is installed between the female head sleeve 18 and the crankshaft cover 16, and the crankshaft cover 16 is installed with a third sealing ring 19 for sealing with the inner hole boss 1102, so as to realize the rotating sealing connection between the crankshaft 13 and the female head body 11.

[0021] Among them, the locking and positioning structure includes a trigger 1404, a handle positioning block 1407 and two positioning blocks 1104 arranged on the inner hole boss 1102, the positioning blocks 1104 are fixedly arranged on both sides of the outer wall of the inner hole boss 1102 along the axial direction of the female head body 11 and are flush with the top surface of the inner hole boss 1102, the positioning blocks 1104 are located on the same side of the axis of the female head body 11, and are used to limit the rotation range of the handle positioning block 1407, the female head self-locking handle 14 includes a handle cover 1401 and a handle 1402 that are fixedly connected, the handle cover 1401 is fixedly connected to the protruding end of the crankshaft 13 by a screw 15, the trigger 1404 is hinged to the handle 1402 below the connection with the handle cover 1401 by a trigger pin 1403, the trigger 1404 is installed with a torsion spring 1406, the trigger A trigger positioning block 1405 is provided at one end of 1404, and the trigger positioning block 1405 is close to the inner hole boss 1102 under the action of the torsion spring 1406, and the handle positioning block 1407 is fixedly arranged on the handle cover 1401 and is located opposite to the trigger positioning block 1405. When the trigger 1404 is held by hand and the trigger positioning block 1405 leaves the inner hole boss 1102, the female self-locking handle 14 can rotate within a range of 180 degrees under the restrictions of the handle positioning block 1407 and the positioning block 1104. When the handle positioning block 1407 is blocked by the positioning block 1104, the trigger 1404 is released, and the trigger positioning block 1405 is close to the inner hole boss 1102 under the action of the torsion spring 1406 and blocks the other positioning block 1104, so that the female self-locking handle 14 cannot rotate, thereby realizing the self-locking function of the female self-locking handle 14.

[0022] Among them, the crankshaft 13 is fixedly connected with two first hinge plates 1302, the first hinge plates 1302 are perpendicular to the crankshaft 13, the female head top block 21 adopts a piston structure and two second hinge plates 2101 are fixedly arranged in the middle of the tail end, the connecting rod 20 is crank-shaped, and the inner arc of the bending part of the connecting rod 20 matches the diameter of the crankshaft 13, and the two ends of the connecting rod 20 are respectively hinged to the first hinge plate 1302 and the second hinge plate 2101 through the pin shaft 22, so that the connecting rod 20 is driven by the rotation of the crankshaft 13, one end of the connecting rod 20 rotates around the axis of the crankshaft 13, and the other end drives the female head top block 21 to reciprocate along the axis of the female head body 11, and the tail of the pin shaft 22 is pinned with a cotter pin to prevent the pin shaft 22 from falling.

[0023] Among them, one end of the female connector body 12 is a socket end 1201, and the other end is a threaded end 1202. A fourth sealing ring 23 for sealing with the socket end 0302 of the male body 03 is provided at the connection between the socket end 1201 and the threaded end 1202. The threaded end 1202 is threadedly fixedly connected to the female body 11 and a fifth sealing ring 24 is installed between the threaded end 1202 and the female body 11. A sealing ring groove is provided in the inner hole of the threaded end 1202 and a sixth sealing ring 25 for sealing the female top block 21 is installed in the sealing ring groove.

[0024] The quick-connect self-locking unit includes a concave locking groove 0303, a cam window 1203 and two quick-connect self-locking handles 26. The concave locking groove 0303 is provided on the male body 03 and is located behind the socket end 0302. The number of cam windows 1203 is two and they are symmetrically provided on the socket end 1201 of the female connector body 12. The quick-connect self-locking handle 26 is symmetrically hinged to the side wall of the female connector body 12 through a hinge pin 27. The quick-connect self-locking handle 26 is provided with a cam 2601, and the cam 2601 corresponds to the cam Window 1203, after the socket end 0302 is inserted into the socket end 1201, the concave locking groove 0303 corresponds to the cam window 1203, and the cam 2601 is stuck on the concave locking groove 0303 by rotating the quick-connect self-locking handle 26, so that the quick connector male head 01 is locked on the quick connector female head 02. The quick-connect self-locking handle 26 has a self-locking function and adopts existing mature technology. It will not be described in detail here. For details, see Chinese patent application number 201220222265.2: A quick connector handle.

[0025] Among them, the male connection end 0301 of the male body 03 is installed with a male sealing ring 09, which is used for the quick connector male 01 to be sealed and connected with the pipeline, and the female connection end 1101 of the female body 11 is installed with a female sealing ring 28, which is used for the quick connector female 02 to be sealed and connected with the pipeline.

[0026] Working principle of the present invention: In the initial state, the male quick connector 01 and the female quick connector 02 are both in a self-sealing state. When the male quick connector 01 and the female quick connector 02 are coupled, first pull the quick-connect self-locking handle 26 outward and make the cam 2601 outside the cam window 1203, insert the socket end 0302 of the male body 03 into the bottom of the socket end 1201, make the concave locking groove 0303 correspond to the cam window 1203, pull the quick-connect self-locking handle 26 again, make the cam 2601 stuck on the concave locking groove 0303, and complete the coupling of the male quick connector 01 and the female quick connector 02, and then hold the trigger 140 The trigger positioning block 1405 is made to leave the inner hole boss 1102, and the handle 1402 is rotated to drive the female head top block 21 to push the male head valve seat 0602 away from the sealing surface of the socket end 0302. At the same time, the sealing surface of the female head top block 21 also leaves the sixth sealing ring 25, so that the inner cavity of the male head body 03 is connected with the inner cavity of the female head body 11 to form a working medium channel. When the handle 1402 drives the handle positioning block 1407 to touch the positioning block 1104, the trigger 1404 is released to make the trigger positioning block 1405 block another positioning block 1104, lock the female head self-locking handle 14 to prevent it from rotating, and complete the connection of the pipeline.

[0027] When the quick connector male 01 and the quick connector female 02 need to be disassembled, it is only necessary to hold the trigger 1404 and rotate the female self-locking handle 14 in the opposite direction to the limit, the female top block 21 moves back and makes the quick connector female 02 self-seal. At the same time, the male valve seat 0602 moves forward under the action of the male spring 08 and makes the quick connector male 01 self-seal. Release the trigger 1404 to lock the female self-locking handle 14, and finally pull the quick connector self-locking handle 26 to release the cam 2601 from the position, so that the quick connector male 01 can be pulled out to complete the pipeline disassembly work.

[0028] Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that various changes, modifications, substitutions and variations may be made to the embodiments without departing from the principles and spirit of the present invention, and that the scope of the present invention is defined by the appended claims and their equivalents.

Claims

1. A self-locking and self-sealing quick connector, comprising a quick connector male head (01) and a quick connector female head (02), characterized in that: The male quick connector (01) comprises a male main body (03) and a male valve core (06); one end of the male main body (03) is a male connection end (0301), and the other end is a socket end (0302); the male valve core (06) is arranged in the male main body (03) and is coaxially elastically slidably connected to the male main body (03); in the initial state of the male quick connector (01), the male valve core (06) is sealed to the socket end (0302); the female quick connector (02) comprises a female main body ( 11), a female connector body (12) and a crankshaft (13), wherein one end of the female connector body (11) is a female connector end (1101), and the other end is coaxially fixedly connected to the female connector body (12), the crankshaft (13) is arranged in the middle of the female connector body (11) and is perpendicular to the axis of the female connector body (11), one end of the crankshaft (13) extends into the female connector body (11), and the other end extends out of the female connector body (11) and is rotatably sealed with the female connector body (11), and the extended end of the crankshaft (13) is fixedly connected to the female connector body (11). The female self-locking handle (14) is provided with a locking positioning structure for limiting the rotation range of the crankshaft (13); the crankshaft (13) is located in the female main body (11) and is hinged with a connecting rod (20); the connecting rod (20) is perpendicular to the crankshaft (13); the other end of the connecting rod (20) is hinged with a female top block (21); the female top block (21) moves axially back and forth in the female joint body (12) under the action of the connecting rod (20); the female top block (21) moves toward the crankshaft When the quick connector (02) moves in the direction of the female connector (13) to the extreme position, it is sealed with the female connector body (12). At this time, it is the initial state of the quick connector female connector (02). After the female connector top block (21) moves a certain distance in the direction of the female connector body (12), it is disengaged from the female connector body (12). The female connector body (12) is provided with a quick-connect self-locking unit. After the quick connector male connector (01) and the quick connector female connector (02) are connected, the quick-connect self-locking unit can lock the quick connector male connector (01) on the quick connector female connector (02).

2. A self-locking and self-closing quick connector according to claim 1, characterized in that: A fixing frame (04) is fixedly arranged inside the male body (03), a push rod sleeve (05) is fixedly arranged inside the fixing frame (04), an end face of the push rod sleeve (05) is closely abutted against a spring cushion seat (07), one end of the male valve core (06) is a male push rod (0601), and the other end is a male valve seat (0602), the end of the male push rod (0601) matches and extends into the push rod sleeve (05), and the male push rod (0601) is sleeved with a male spring (08 ), one end of the male spring (08) is flush with the spring cushion seat (07), and the other end is flush with the male valve seat (0602), the male valve seat (0602) is provided with an outer arc-shaped conical surface, and the arc-shaped conical surface is installed with a first sealing ring (10), and the socket end (0302) is provided with an inner arc-shaped conical surface matching the outer arc-shaped conical surface, and the male valve seat (0602) is sealed with the socket end (0302) through the first sealing ring (10) under the action of the male spring (08).

3. A self-locking and self-closing quick connector according to claim 2, characterized in that: The male head body (03) is fixedly provided with a positioning plate (0304), a through hole is provided in the middle of the positioning plate (0304), three arc protrusions (0305) are evenly provided on the inner wall of the through hole, and the arc protrusions are provided with positioning holes (0306), and the fixing frame (04) is evenly fixedly provided with three brackets (0401), and a positioning boss (0402) is fixedly provided on the outward side of the end of the bracket (0401), and the fixing frame (04) is inserted into the positioning hole (0306) by matching the positioning boss (0402) and is fixedly connected to the male head body (03) through the pressing action of the male head spring (08).

4. A self-locking and self-closing quick connector according to claim 1, characterized in that: The outer wall of the female head body (11) is fixedly provided with an inner hole boss (1102), the inner wall of the female head body (11) is provided with a bearing hole (1103), the inner hole boss (1102) and the bearing hole (1103) are coaxial, a positioning retaining ring (1301) is fixedly provided in the middle of the crankshaft (13), one end of the crankshaft (13) extends into the bearing hole (1103), and the other end extends out of the inner hole boss (1102), and the crankshaft (13) is sleeved with a female head shaft sleeve (1301). 8) and a crankshaft cover (16), the female shaft sleeve (18) being against the top of the positioning retaining ring (1301), the crankshaft cover (16) being pressed against the top of the female shaft sleeve (18) and being threadedly fixedly connected to the inner hole boss (1102), a second sealing ring (17) for sealing the crankshaft (13) being installed between the female shaft sleeve (18) and the crankshaft cover (16), and a third sealing ring (19) for sealing with the inner hole boss (1102) being installed on the crankshaft cover (16).

5. A self-locking and self-closing quick connector according to claim 4, characterized in that: The locking and positioning structure comprises a trigger (1404) arranged on the female self-locking handle (14), a handle positioning block (1407) and two positioning blocks (1104) arranged on the inner hole boss (1102); the positioning blocks (1104) are fixedly arranged on both sides of the outer wall of the inner hole boss (1102) along the axial direction of the female body (11) and are flush with the top surface of the inner hole boss (1102); the positioning blocks (1104) are located on the same side of the axis of the female body (11); the female self-locking handle (14) comprises a handle cover (1401) and a handle (1402) which are fixedly connected; the handle cover (1401) is fixedly connected to the protruding end of the crankshaft (13) by a screw (15); The trigger (1404) is hinged to the handle (1402) below the connection with the handle cover (1401) through a trigger pin (1403), and the trigger (1404) is installed with a torsion spring (1406). A trigger positioning block (1405) is provided at one end of the trigger (1404). The trigger positioning block (1405) is close to the inner hole boss (1102) under the action of the torsion spring (1406), and the handle positioning block (1407) is fixedly arranged on the handle cover (1401) and is located opposite to the trigger positioning block (1405). The female self-locking handle (14) can rotate within a range of 180 degrees under the restriction of the handle positioning block (1407) and the positioning block (1104).

6. A self-locking and self-closing quick connector according to claim 1, characterized in that: The crankshaft (13) is fixedly connected to two first hinged plates (1302), the first hinged plates (1302) are perpendicular to the crankshaft (13), the female head top block (21) adopts a piston structure and two second hinged plates (2101) are fixedly arranged in the middle of the tail end, the connecting rod (20) is crank-shaped, the inner arc of the bending part of the connecting rod (20) matches the diameter of the crankshaft (13), and the two ends of the connecting rod (20) are respectively hinged to the first hinged plate (1302) and the second hinged plate (2101) through a pin shaft (22).

7. The self-locking and self-closing quick connector according to claim 1, characterized in that: One end of the female connector body (12) is a socket end (1201), and the other end is a threaded end (1202); a fourth sealing ring (23) for sealing with the socket end (0302) of the male body (03) is provided at the connection between the socket end (1201) and the threaded end (1202); the threaded end (1202) is threadedly fixedly connected to the female body (11), and a fifth sealing ring (24) is installed between the threaded end (1202) and the female body (11); a sealing ring groove is provided in the inner hole of the threaded end (1202), and a sixth sealing ring (25) for sealing the female top block (21) is installed in the sealing ring groove.

8. The self-locking and self-closing quick connector according to claim 1, characterized in that: The quick-connect self-locking unit comprises a concave locking groove (0303), a cam window (1203) and two quick-connect self-locking handles (26); the concave locking groove (0303) is formed on the male body (03) and is located behind the socket end (0302); the cam windows (1203) are two in number and are symmetrically formed on the socket end (1201) of the female connector body (12); the quick-connect self-locking handles (26) are symmetrically hinged to the female connector body (12) via hinge pins (27). 2) side wall, the quick-connect self-locking handle (26) is provided with a cam (2601), the cam (2601) corresponds to the cam window (1203), after the socket end (0302) is inserted into the socket end (1201), the concave locking groove (0303) corresponds to the cam window (1203), and the cam (2601) is locked in the concave locking groove (0303) by rotating the quick-connect self-locking handle (26), thereby locking the quick connector male end (01) on the quick connector female end (02).

9. The self-locking and self-closing quick connector according to claim 1, characterized in that: The male connection end (0301) of the male main body (03) is installed with a male sealing ring (09), and the female connection end (1101) of the female main body (11) is installed with a female sealing ring (28).

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