A self-locking self-closing quick connector

Abstract

The application discloses a self-locking and self-closing quick connector, which comprises a male head and a female head, the male head comprises a male head main body and a male head valve core, one end of the male head main body is a male head connecting end, and the other end is a spigot end, the male head valve core is arranged in the male head main body and is coaxially and elastically slidably connected with the male head main body, the male head valve core is sealed to the spigot end in the initial state of the male head, the female head comprises a female head main body, a female head connector body and a crankshaft, the female head is provided with a locking handle, the crankshaft, a connecting rod and a female head top block are linked, and a locking positioning structure for limiting the rotating range of the crankshaft is arranged on the female head locking handle, so that the connection and disconnection of the quick connector can be completed by one person, the operator only needs to hold the trigger and rotate the female head locking handle, the male head valve seat is pushed by the female head top block, the pipeline is connected, the operation process is greatly simplified, and the operation difficulty and strength are reduced.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of pipe connection, in particular to a self-locking and self-sealing quick connector. BACKGROUND

[0002] In the process of fluid transmission such as liquid and gas, quick connectors are often used to realize quick connection and disconnection of pipes, which greatly improves work efficiency. A self-locking and self-sealing quick connector is disclosed in Chinese Patent No. CN221922440U, which has the characteristics of connection self-locking, triggering anti-dropping device before valve opening, and automatic sealing after accidental dropping. However, it has the following defects: the operation process is complex, the operation difficulty and intensity are large, and it is difficult for a single person to complete the operation. The front valve core in the female end needs to be pressed to achieve sealing function, so the spring force of the compression spring pressing the front valve core will be large, otherwise the sealing effect will be poor. When the female end is connected to the male end connector, one person needs to use both hands to overcome the spring force of the compression spring and push the female end to the bottom, at this time another person needs to rotate the locking handle to make the cam of the locking handle block the concave interface of the male end connector, and after the locking handle is locked, the first person can release both hands. Therefore, it is necessary to provide a self-locking and self-sealing quick connector which is simple and light in operation to solve the problems existing in the prior art. SUMMARY

[0003] The present application aims to provide a self-locking and self-sealing quick connector, which simplifies the operation process, reduces the operation difficulty and intensity, and ensures good sealing effect and self-locking performance.

[0004] To achieve the above-mentioned purpose, the present application provides the following technical solutions:

[0005] The utility model provides a kind of self-locking self-closing quick connector, including quick connector male and quick connector female, the quick connector male includes male head body, male valve core, one end of male head body is male connection end, the other end is socket end, the male valve core is arranged in male head body and is coaxially elastically sliding connection with male head body, the male valve core is sealed in socket end when the initial state of quick connector male, the quick connector female includes female head body, female connector body and crankshaft, one end of female head body is female connection end, the other end is coaxially fixedly connected with female connector body, the crankshaft is arranged in female head body middle part and perpendicular to female head body axis, one end of the crankshaft extends into female head body, the other end extends out of female head body and is rotatably sealed with female head body, the crankshaft fixedly connected with female self-locking handle on the other end, the female self-locking handle is provided with locking positioning structure for limiting the rotation range of crankshaft, the crankshaft is hinged with connecting rod in female head body, the connecting rod is perpendicular to crankshaft, the other end of the connecting rod is hinged with female top block, the female top block reciprocating axial movement in female connector body under the action of connecting rod, the female top block moves to limit position in the direction of crankshaft and is sealed with female connector body, at this time, it is the initial state of quick connector female, the female top block is sealed with female connector body after moving a certain distance in the direction of female connector body, the female connector body is provided with quick connection self-locking unit, after the butt joint of quick connector male and quick connector female, quick connection self-locking unit can lock quick connector male on quick connector female.

[0006] Further, the male head body is fixedly provided with a fixing frame, the fixing frame is fixedly provided with a jack sleeve, the end face of the jack sleeve is abutted with a spring pad seat, one end of the male valve core is a male jack, and the other end is a male valve seat, the male jack is matched to extend into the jack sleeve, the male jack is provided with a male spring, one end of the male spring is abutted with the spring pad seat, and the other end is abutted with the male valve seat, the male valve seat is provided with an outer arc-shaped taper surface, the arc-shaped taper surface is mounted with a first sealing ring, the socket end is provided with an inner arc-shaped taper surface matched with the outer arc-shaped taper surface, and the male valve seat is sealed with the socket end by the first sealing ring under the action of the male spring.

[0007] Further, the male head body is fixedly provided with a positioning plate, a through hole is formed in the middle of the positioning plate, three arc protrusions are uniformly arranged on the inner wall of the through hole, the arc protrusions are provided with positioning holes, and three supports are uniformly and fixedly arranged on the fixing frame. The positioning convex column is fixedly arranged on the outward side of the end portion of the support, the fixing frame is matched and inserted into the positioning hole through the positioning convex column and is fixedly connected with the male head body through the compression action of the male spring.

[0008] Further, the outer wall of the female head body is fixedly provided with an inner hole boss, the inner wall of the female head body is provided with a bearing hole, the inner hole boss is coaxial with the bearing hole, the crankshaft is fixedly provided with a positioning stop ring in the middle, one end of the crankshaft extends into the bearing hole, the other end extends out of the inner hole boss, the crankshaft is sleeved with a female head sleeve and a crankshaft cover, the female head sleeve is located above the positioning stop ring, the crankshaft cover is pressed above the female head sleeve and is fixedly connected with the inner hole boss in a threaded manner, a second sealing ring for sealing the crankshaft is installed between the female head sleeve and the crankshaft cover, and the crankshaft cover is installed with a third sealing ring for sealing the inner hole boss.

[0009] Further, the locking positioning structure comprises a trigger provided on the female head self-locking handle, a handle positioning block, and two positioning blocks provided on the inner hole boss, the positioning blocks are fixedly arranged on the outer wall of the inner hole boss on both sides of the female head body in the axial direction and are flush with the top surface of the inner hole boss, the positioning blocks are located on the same side of the female head body axis, the female head self-locking handle comprises a handle cover and a handle handle fixedly connected, the handle cover is fixedly connected with the extension end of the crankshaft through screws, the trigger is hingedly connected to the handle handle below the connection with the handle cover, the trigger is installed with a torsional spring, one end of the trigger is provided with a trigger positioning block, the trigger positioning block is close to the inner hole boss under the action of the torsional spring, the handle positioning block is fixedly arranged on the handle cover and located opposite to the trigger positioning block, and the female head self-locking handle can rotate within a range of 180 degrees under the limitation of the handle positioning block and the positioning block.

[0010] Further, 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 is fixedly provided with two second hinge plates 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 diameter of the crankshaft, and the connecting rod is hingedly connected with the first hinge plate and the second hinge plate through a pin shaft at both ends.

[0011] Further, one end of the female head joint body is a socket end, the other end is a threaded end, the socket end is provided with a fourth sealing ring for sealing the socket end of the male head body at the connection with the threaded end, the threaded end is fixedly connected with the female head body in a threaded manner and is installed with a fifth sealing ring between the threaded end and the female head body, and a sealing ring groove is formed in the inner hole of the threaded end and is installed with a sixth sealing ring for sealing the female head top block.

[0012] Further, the quick connector self-locking unit comprises a female lock groove, cam windows and two quick connector self-locking handles, the female lock groove is arranged on the male head body and located at the rear of the socket end, the cam windows are two and symmetrically arranged on the spigot end of the female head connector body, the quick connector self-locking handles are symmetrically hinged to the sidewall of the female head connector body through a hinge pin, the quick connector self-locking handle is provided with a cam, the cam corresponds to the cam window, after the socket end is inserted into the spigot end, the female lock groove corresponds to the cam window, the cam is clamped on the female lock groove by rotating the quick connector self-locking handle, and the male head of the quick connector is locked on the female head.

[0013] Further, the male head connecting end of the male head body is provided with a male head sealing ring, and the female head connecting end of the female head body is provided with a female head sealing ring.

[0014] Compared with the prior art, the quick connector has the following beneficial effects:

[0015] 1、The female head self-locking handle, the crankshaft, the connecting rod and the female head top block are connected, the locking positioning structure for limiting the rotation range of the crankshaft is arranged on the female head self-locking handle, one person can complete the connection and disconnection of the quick connector, the operator only needs to hold the trigger and rotate the female head self-locking handle, the male head valve seat is pushed by the female head top block, the communication of the pipeline is completed, the operation process is greatly simplified, the operation difficulty and strength are reduced, and the user experience and satisfaction are significantly improved.

[0016] 2、The quick connector is reasonable in design and compact in structure, is suitable for the connection of various fluid transmission pipelines, and has the self-sealing performance after being disconnected, so that no additional valve needs to be arranged, the quick connector is convenient to install and disassemble, the working efficiency is improved, and the cost is saved. BRIEF DESCRIPTION OF DRAWINGS

[0017] Figure 1 is the appearance diagram of the present application;

[0018] Figure 2 is the sectional view of the male head of the quick connector;

[0019] Figure 3 is the view of the male head body;

[0020] Figure 4 is the view of the fixing frame;

[0021] Figure 5 is the sectional view of the female head of the quick connector Figure 1 ;

[0022] Figure 6 is the sectional view of the female head of the quick connector Figure 2 ;

[0023] Figure 7is a female head body view;

[0024] Figure 8 is a crankshaft view;

[0025] Figure 9 is a coupling state cross section of the present application Figure 1 ;

[0026] Figure 10 is a coupling state cross section of the present application Figure 2 ;

[0027] In the figure: 01 - male quick connector, 02 - female quick connector, 03 - male head body, 0301 - male connecting end, 0302 - socket end, 0303 - concave locking groove, 0304 - positioning plate, 0305 - circular arc protruding part, 0306 - positioning hole, 04 - fixing frame, 0401 - support, 0402 - positioning convex column, 05 - top rod sleeve, 06 - male valve core, 0601 - male top rod, 0602 - male valve seat, 07 - spring pad seat, 08 - male spring, 09 - male sealing ring, 10 - first sealing ring, 11 - female head body, 1101 - female connecting end, 1102 - inner hole boss, 1103 - bearing hole, 1104 - positioning stop block, 12 - female connector body, 1201 - socket end, 1202 - threaded end, 1203 - cam window, 13 - crankshaft, 1301 - positioning stop ring, 1302 - first hinged plate, 14 - female self-locking handle, 1401 - handle cover, 1402 - handle 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 hinged plate, 22 - pin shaft, 23 - fourth sealing ring, 24 - fifth sealing ring, 25 - sixth sealing ring, 26 - quick self-locking handle, 2601 - cam, 27 - hinged pin, 28 - female sealing ring. DETAILED DESCRIPTION

[0028] The present application will be described in detail below with reference to the accompanying drawings and specific embodiments.

[0029] Please refer to Figures 1-10 , an embodiment provided by the present application:

[0030] The self-locking and self-sealing quick connector comprises a quick connector male head 01 and a quick connector female head 02, the quick connector male head 01 comprises a male head main body 03 and a male head valve core 06, one end of the male head main body 03 is a male head connecting end 0301, the other end is a socket end 0302, the male head valve core 06 is arranged in the male head main body 03 and is coaxially and elastically slidably connected with the male head main body 03, the male head valve core 06 is sealed at the socket end 0302 in the initial state of the quick connector male head 01, the quick connector female head 02 comprises a female head main body 11, a female head connector body 12 and a crank shaft 13, one end of the female head main body 11 is a female head connecting end 1101, the other end is coaxially and fixedly connected with the female head connector body 12, the crank shaft 13 is arranged in the middle of the female head main body 11 and is perpendicular to the axis of the female head main body 11, one end of the crank shaft 13 extends into the female head main body 11, the other end extends out of the female head main body 11 and is rotatably and sealingly connected with the female head main body 11, the extending end of the crank shaft 13 is fixedly connected with a female head self-locking handle 14, the female head self-locking handle 14 is provided with a locking positioning structure for limiting the rotation range of the crank shaft 13, the crank shaft 13 is hingedly connected with a connecting rod 20 in the female head main body 11, the connecting rod 20 is perpendicular to the crank shaft 13, the other end of the connecting rod 20 is hingedly connected with a female head top block 21, the female head top block 21 moves reciprocatingly and axially in the female head connector body 12 under the action of the connecting rod 20, the female head top block 21 is sealed with the female head connector body 12 when moving to the limit position in the direction of the crank shaft 13, at this time, it is the initial state of the quick connector female head 02, the female head top block 21 is unsealed with the female head connector body 12 after moving a certain distance in the direction of the female head connector body 12, the female head connector body 12 is provided with a quick connection self-locking unit, after the quick connector male head 01 and the quick connector female head 02 are connected, the quick connection self-locking unit can lock the quick connector male head 01 on the quick connector female head 02.

[0031] In the male head main body 03, a fixed frame 04 is fixedly arranged, a top rod sleeve 05 is fixedly arranged in the fixed frame 04, a spring pad seat 07 is tightly arranged on the end face of the top rod sleeve 05, one end of the male head valve core 06 is a male head top rod 0601, the other end is a male head valve seat 0602, the male head top rod 0601 extends into the top rod sleeve 05, a male head spring 08 is sleeved on the male head top rod 0601, one end of the male head spring 08 is flatly attached to the spring pad seat 07, the other end is flatly attached to the male head valve seat 0602, the male head valve seat 0602 is provided with an outer arc-shaped taper surface, a first sealing ring 10 is mounted on the arc-shaped taper surface, the socket end 0302 is provided with an inner arc-shaped taper surface matched with the outer arc-shaped taper surface, 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 the free state.

[0032] The male head body 03 is fixedly provided with a positioning plate 0304, a through hole is formed in the middle of the positioning plate 0304, three arc protruding parts 0305 are uniformly arranged on the inner wall of the through hole, the arc protruding part is provided with a positioning hole 0306, so that the diameter of the through hole is greater than the diameter of the index circle of the positioning hole 0306, the fixed frame 04 is convenient to install on the positioning plate 0304 after entering the through hole from the male connecting end 0301, the fixed frame 04 is uniformly and fixedly provided with three supports 0401, the positioning protruding column 0402 is fixedly arranged on the outward side of the end portion of the support 0401, the fixed frame 04 is matched and inserted into the positioning hole 0306 through the positioning protruding column 0402 and is fixedly connected with the male head body 03 through the compression effect of the male spring 08.

[0033] The female head body 11 is fixedly provided with an inner hole boss 1102 on the outer wall, a bearing hole 1103 is formed in the inner wall of the female head body 11, the inner hole boss 1102 is coaxial with the bearing hole 1103, the crankshaft 13 is fixedly provided with a positioning baffle 1301 in the middle, one end of the crankshaft 13 extends into the bearing hole 1103, the other end extends out of the inner hole boss 1102, the female head sleeve 18 and the crankshaft cover 16 are sleeved on the crankshaft 13, the female head sleeve 18 is located above the positioning baffle 1301, the crankshaft cover 16 is pressed above the female head sleeve 18 and is screwedly connected with the inner hole boss 1102, the second sealing ring 17 for sealing the crankshaft 13 is installed between the female head sleeve 18 and the crankshaft cover 16, the third sealing ring 19 for sealing with the inner hole boss 1102 is installed on the crankshaft cover 16, and the rotating sealing connection between the crankshaft 13 and the female head body 11 is realized.

[0034] The locking positioning structure comprises a trigger 1404, a handle positioning block 1407 arranged on the female head self-locking handle 14, and two positioning blocks 1104 arranged on the inner hole boss 1102. The positioning blocks 1104 are fixedly arranged on the two sides of the outer wall of the inner hole boss 1102 along the axis 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 for limiting the rotation range of the handle positioning block 1407. The female head self-locking handle 14 comprises a handle cover 1401 and a handle 1402 fixedly connected. The handle cover 1401 is fixedly connected with the extension end of the crankshaft 13 through a screw 15. The trigger 1404 is hingedly connected to the lower part of the handle 1402 close to the connection part of the handle 1402 and the handle cover 1401 through a trigger pin 1403. The trigger 1404 is provided with a torsional spring 1406. One end of the trigger 1404 is provided with a trigger positioning block 1405. The trigger positioning block 1405 is close to the inner hole boss 1102 under the action of the torsional spring 1406. 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 the hand and the trigger positioning block 1405 is away from the inner hole boss 1102, the female head self-locking handle 14 can rotate within a range of 180 degrees under the limitation 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. The trigger positioning block 1405 is close to the inner hole boss 1102 under the action of the torsional spring 1406 and blocks the other positioning block 1104, so that the female head self-locking handle 14 cannot rotate, thereby realizing the self-locking function of the female head self-locking handle 14.

[0035] The crankshaft 13 is fixedly connected with two first hinge plates 1302 which are perpendicular to the crankshaft 13. The female head top block 21 adopts a piston structure and is fixedly provided with two second hinge plates 2101 at the middle part of the tail end. The connecting rod 20 is in the shape of a crank. The inner arc of the bending part of the connecting rod 20 matches the diameter of the crankshaft 13. The two ends of the connecting rod 20 are hingedly connected with the first hinge plate 1302 and the second hinge plate 2101 through a pin shaft 22. The connecting rod 20 is driven to rotate around the axis of the crankshaft 13 and to drive the female head top block 21 to reciprocate along the axis of the female head body 11. The tail part of the pin shaft 22 is fixed by a split pin to prevent the pin shaft 22 from falling off.

[0036] The one end of the female head connector body 12 is a socket end 1201, and the other end is a threaded end 1202. The socket end 1201 is provided with a fourth sealing ring 23 for sealing the socket end 0302 of the male head body 03. The threaded end 1202 is fixedly connected with the female head body 11 through threads and is provided with a fifth sealing ring 24 between the threaded end 1202 and the female head body 11. The inner hole of the threaded end 1202 is provided with a sealing ring groove in which a sixth sealing ring 25 for sealing the female head top block 21 is arranged.

[0037] Wherein, the quick-connection self-locking unit comprises a female locking groove 0303, cam windows 1203 and two quick-connection self-locking handles 26, the female locking groove 0303 is arranged on the male head body 03 and located behind the socket end 0302, the cam windows 1203 are two and symmetrically arranged on the spigot end 1201 of the female head connector body 12, the quick-connection self-locking handles 26 are symmetrically hinged to the sidewall of the female head connector body 12 through hinge pins 27, the quick-connection self-locking handles 26 are provided with cams 2601, the cams 2601 correspond to the cam windows 1203, after the socket end 0302 is inserted into the spigot end 1201, the female locking groove 0303 corresponds to the cam windows 1203, the quick-connection self-locking handles 26 are turned to make the cams 2601 clamped on the female locking groove 0303, so that the male quick connector 01 is locked on the female quick connector 02, the quick-connection self-locking handles 26 have a self-locking function, and the existing mature technology is adopted, which will not be described in detail here, and see the Chinese patent with the application number 201220222265.2: a quick connector handle.

[0038] Wherein, the male head body 03 is provided with a male sealing ring 09 arranged on the male connection end 0301, for sealingly connecting the male quick connector 01 with a pipeline, and the female head body 11 is provided with a female sealing ring 28 arranged on the female connection end 1101, for sealingly connecting the female quick connector 02 with the pipeline.

[0039] Working principle of the present application:

[0040] In the initial state, the male quick connector 01 and the female quick connector 02 are in a self-sealing state, when the male quick connector 01 and the female quick connector 02 are coupled, the quick-connection self-locking handles 26 are first pulled outward and the cams 2601 are located outside the cam windows 1203, the socket end 0302 of the male head body 03 is inserted into the bottom of the spigot end 1201, so that the female locking groove 0303 corresponds to the cam windows 1203, the quick-connection self-locking handles 26 are again pulled to make the cams 2601 clamped on the female locking groove 0303, that is, the coupling of the male quick connector 01 and the female quick connector 02 is completed, then the trigger 1404 is buckled to make the trigger positioning block 1405 away from the inner hole boss 1102, the handle 1402 is turned to drive the female top block 21 to push the male valve seat 0602 away from the sealing surface of the socket end 0302, at the same time, the sealing surface of the female top block 21 is also away from the sixth sealing ring 25, so that the inner cavities of the male head body 03 and the female head body 11 are communicated, forming 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 the other positioning block 1104, so that the female self-locking handle 14 is locked and prevented from rotating, that is, the connection of the pipeline is completed.

[0041] When the male coupling head 01 and the female coupling head 02 need to be disconnected, just hold the trigger 1404 and reverse the female head self-locking handle 14 to the limit, the female head top block 21 moves back and makes the female coupling head 02 self-seal, at the same time, the male head valve seat 0602 moves forward under the action of the male spring 08 and makes the male coupling head 01 self-seal, release the trigger 1404 to lock the female head self-locking handle 14, and finally pull the quick coupling self-locking handle 26 to release the clamping of the cam 2601, the male coupling head 01 can be pulled out, and the pipeline disconnection work is completed.

[0042] While the embodiments of the application have been illustrated and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and alterations can be made therein without departing from the spirit and scope of the application, which is defined by the appended claims and their equivalents.

Claims

1. A self-locking, self-sealing quick connector, comprising a male quick connector (01) and a female quick connector (02), characterized in that: The quick-connect male connector (01) includes a male connector body (03) and a male connector valve core (06). One end of the male connector body (03) is a male connector connection end (0301), and the other end is a socket end (0302). The male connector valve core (06) is disposed inside the male connector body (03) and is coaxially and elastically slidably connected to the male connector body (03). In the initial state, the male connector valve core (06) of the quick-connect male connector (01) is sealed to the socket end (0302). The quick-connect female connector (02) includes a female connector body (… 11) A female connector body (12) and a crankshaft (13). One end of the female connector body (11) is a female connector end (1101), and the other end is coaxially and fixedly connected to the female connector body (12). The crankshaft (13) is located 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 and sealingly connected to the female connector body (11). The extended end of the crankshaft (13) is fixedly connected to a female connector. The head 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 inside the head body (11) and a connecting rod (20) is hinged thereto. The connecting rod (20) is perpendicular to the crankshaft (13). The other end of the connecting rod (20) is hinged to a head top block (21). The head top block (21) moves axially back and forth within the head connector body (12) under the action of the connecting rod (20). The head top block (21) moves towards the crankshaft. (13) When the direction moves to the limit position, it seals with the female connector body (12). At this time, it is the initial state of the quick connector female head (02). After the female head top block (21) moves a certain distance towards the female connector body (12), it disengages from the seal with the female connector body (12). The female connector body (12) is provided with a quick-connect self-locking unit. After the quick connector male head (01) and quick connector female head (02) are connected, the quick-connect self-locking unit can lock the quick connector male head (01) on the quick connector female head (02). The locking and positioning structure includes a trigger (1404) and a handle positioning block (1407) disposed on the female head self-locking handle (14), and two positioning blocks (1104) disposed on the inner hole boss (1102). The positioning blocks (1104) are fixedly disposed 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). The female head self-locking handle (14) includes a handle cover (1401) and a handle (1402) fixedly connected. The handle cover (1401) is fixedly connected to the protruding end of the crankshaft (13) by screws (15). The trigger (1404) is hinged to the handle (1402) near the connection point with the handle cover (1401) via a trigger pin (1403). The trigger (1404) is equipped with a torsion spring (1406). One end of the trigger (1404) is provided with a trigger positioning block (1405). Under the action of the torsion spring (1406), the trigger positioning block (1405) is close to the inner hole boss (1102). The handle positioning block (1407) is fixedly set on the handle cover (1401) and located opposite 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 stop (1104).

2. The self-locking and self-sealing quick connector according to claim 1, characterized in that: A fixing frame (04) is fixedly installed inside the male head body (03). A push rod sleeve (05) is fixedly installed inside the fixing frame (04). A spring pad (07) is tightly pressed against the end face of the push rod sleeve (05). One end of the male head valve core (06) is a male head push rod (0601), and the other end is a male head valve seat (0602). The end of the male head push rod (0601) extends into the push rod sleeve (05). A male head spring (08) is fitted onto the male head push rod (0601). One end of the male spring (08) is flat against the spring pad (07), and the other end is flat against the male valve seat (0602). The male valve seat (0602) is provided with an outer arc-shaped conical surface, and a first sealing ring (10) is installed on the outer arc-shaped conical surface. The socket end (0302) is provided with an inner arc-shaped conical surface that matches the outer arc-shaped conical surface. Under the action of the male spring (08), the male valve seat (0602) is sealed with the socket end (0302) through the first sealing ring (10).

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

4. The self-locking and self-sealing 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), and 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). A female head bushing (1102) is fitted on the crankshaft (13). 8) and crankshaft cover (16), the female head bushing (18) rests on the positioning retaining ring (1301), the crankshaft cover (16) presses on the female head bushing (18) and is threadedly fixed to the inner hole boss (1102), a second sealing ring (17) for sealing the crankshaft (13) is installed between the female head bushing (18) and the crankshaft cover (16), and a third sealing ring (19) for sealing with the inner hole boss (1102) is installed on the crankshaft cover (16).

5. A self-locking, self-sealing quick connector according to claim 1, characterized in that: The crankshaft (13) is fixedly connected to two first hinge plates (1302), which are perpendicular to the crankshaft (13). The female head block (21) adopts a piston structure and has two second hinge plates (2101) fixedly installed at the middle of its tail end. The connecting rod (20) is crank-shaped, and the inner arc of the bent part of the connecting rod (20) matches the diameter of the crankshaft (13). The two ends of the connecting rod (20) are respectively hinged to the first hinge plate (1302) and the second hinge plate (2101) through pins (22).

6. A self-locking, self-sealing 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) is provided at the connection between the socket end (1201) and the threaded end (1202) for sealing with the insertion end (0302) of the male body (03). 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 opened in the inner hole of the threaded end (1202) and a sixth sealing ring (25) for sealing the top block (21) of the female head is installed in the sealing ring groove.

7. A self-locking, self-sealing quick connector according to claim 1, characterized in that: 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 located on the male connector body (03) and behind the socket end (0302). There are two cam windows (1203), which are symmetrically located 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 (1201) 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), by rotating the quick-connect self-locking handle (26) the cam (2601) is locked on the concave locking groove (0303), locking the quick connector male head (01) on the quick connector female head (02).

8. A self-locking and self-sealing quick connector according to claim 1, characterized in that: The male connector (03) has a male sealing ring (09) installed on the male connector connection end (0301), and the female connector (11) has a female sealing ring (28) installed on the female connector connection end (1101).

Images