Pneumatic quick-plug connector and mounting method thereof

Abstract

The invention relates to the technical field of pipe connectors, in particular to a pneumatic quick-plug connector and an installation method thereof.The pneumatic quick-plug connector comprises a connector body and a pressing cover, an elastic sleeve is arranged in the connector body, the section of the elastic sleeve is in a C shape with an opening facing the interior of the elastic sleeve, and the elastic sleeve comprises an elastic claw, a supporting section and a deformation elastic piece which are sequentially arranged from top to bottom; the multiple elastic claws are arranged in the circumferential direction of the elastic sleeve at intervals, one end of each elastic claw is connected with the supporting section, the other end of each elastic claw overhangs towards the interior of the elastic sleeve and is bent downwards, and each elastic claw forms a barb structure so as to be attached to the outer wall of the pipe body when the pipe body is inserted into the connector body downwards and prevent the pipe body from falling upwards after the pipe body is inserted into the connector body. The pressing cover is vertically and movably inserted into the connector body, and when the pressing cover is pressed downwards, the lower end of the pressing cover extrudes the elastic claw, so that the elastic claw releases the pipe body. The quick-plug connector solves the technical problem that normal use of the quick-plug connector is affected due to the fact that the quick-plug connector in the prior art is prone to misoperation.

Description

Technical Field

[0001] The invention relates to the technical field of pipe joints, and in particular to a pneumatic quick-plug joint and an installation method thereof. Background Art

[0002] A pneumatic quick-connect connector is a quick-connect connector mainly used for high-pressure piping, high-pressure gas cylinders and other gas sources (including gas supply devices and gas lines). It is a connector that can connect or disconnect pipelines without tools. In the prior art, the invention patent with authorization announcement number CN110319289B discloses a high-pressure resistant quick-connect connector and a push-on cover. The quick-connect connector includes a connector body and a push-on cover inserted in the connector body. A high-pressure ring is also provided in the connector body. When in use, the push-on cover is sleeved on the tube body, and the push-on cover is fixed in the connector body by riveting or the like. The high-pressure ring is a movable part that can slide between the seal and the push-on cover. When the push-on cover is pressed downward to slide downward, the tube body is released, thereby achieving the effect of quick plugging and pulling.

[0003] When installing existing quick-connect connectors, it is often necessary to press the push cover to reliably connect the tube body and the quick-connect connector. During installation, the installer is likely to forget to press the push cover and directly insert the tube body into the quick-connect connector. This misoperation can easily cause scratches on the outer wall of the tube body, and the tube body and the quick-connect connector cannot be reliably connected, affecting the normal use of the quick-connect connector. Summary of the invention

[0004] In order to overcome the deficiencies of the prior art, the present invention proposes a pneumatic quick-connect connector and an installation method thereof, so as to solve the technical problem that the quick-connect connector in the prior art is prone to misoperation and affects the normal use of the quick-connect connector.

[0005] A pneumatic quick-connect connector and an installation method thereof of the present invention adopt the following technical solutions: A pneumatic quick-connect connector, comprising a connector body and a push cover coaxially inserted in the connector body, the axes of the connector body and the push cover both extending in the up-down direction, an elastic sleeve being arranged in the connector body, the elastic sleeve being installed in the connector body through a positioning piece, the cross-sectional shape of the elastic sleeve being a C-shape with an opening facing the inside of the elastic sleeve, the elastic sleeve comprising a spring claw, a support section and a deformable spring sheet arranged in sequence from top to bottom, a plurality of spring claws being arranged at intervals along the circumference of the elastic sleeve, one end of the spring claw being connected to the support section, and the other end being cantilevered toward the inside of the elastic sleeve and bent downward, the spring claw forming a barb structure so as to fit with the outer wall of the tube body when the tube body is inserted downward into the connector body, and to prevent the tube body from falling off upward after the tube body is inserted into the connector body, the push cover being movably inserted in the connector body up and down, and when the push cover is pressed downward, the lower end of the push cover squeezes the spring claw so that the spring claw releases the tube body.

[0006] Furthermore, a plurality of deformable spring sheets are arranged at intervals along the circumference of the elastic sleeve, one end of the deformable spring sheet is connected to the support section, and the other end is arranged obliquely toward the interior of the elastic sleeve, and the end of the deformable spring sheet facing the interior of the elastic sleeve is rotatably connected to the positioning piece, and the spring claw and the support section can move up and down along the axial direction of the joint body. In the process of inserting the tube body downward into the joint body, the spring claw drives the support section to move downward under the friction with the tube body, so that the support section squeezes the upper end of the deformable spring sheet downward, and the middle part of the deformable spring sheet bulges upward after being squeezed, and the end of the deformable spring sheet facing the interior of the elastic sleeve swings upward around its rotational connection position with the positioning piece, and the deformable spring sheet forms a coil spring structure that pulls the support section downward.

[0007] Furthermore, the positioning member includes a positioning sleeve and a clamping ring arranged at the lower end of the positioning sleeve, the joint body, the positioning member and the pressing cover are coaxially arranged in sequence from the outside to the inside, the lower end of the deformable spring piece is rotatably connected to the clamping ring, a connecting column is fixed to the end of the deformable spring piece facing the inside of the elastic sleeve, a rotating groove is opened in the clamping ring, the connecting column is rotatably installed in the rotating groove, and the deformable spring piece is rotatably connected to the clamping ring through the connecting column and the rotating groove.

[0008] Furthermore, the rotation groove is an annular groove extending circumferentially along the elastic sleeve, and the connecting column on each deformable spring sheet can slide circumferentially along the annular groove.

[0009] Furthermore, a spiral drive structure is provided between the outer wall of the support section and the inner wall of the positioning sleeve, and the spiral drive structure includes a thread groove and a thread protrusion, and the thread groove and the thread protrusion are respectively arranged on the outer wall of the support section and the inner wall of the positioning sleeve. When the support section moves along the axial direction of the joint body, the thread drive structure can drive the elastic sleeve to rotate around its own axis.

[0010] Furthermore, a sealing ring is provided in the joint body below the clamping ring, and a step surface is provided in the joint body below the sealing ring, and the clamping ring clamps and fixes the sealing ring between the step surface and the clamping ring.

[0011] Furthermore, the upper end of the joint body is provided with a limiting claw bent toward the inside of the joint body, and a circle of grooves is provided on the outer wall of the positioning sleeve. The upper end of the limiting claw is located in the groove and positioned with the inner wall of the groove to prevent the positioning sleeve from falling off from the joint body.

[0012] Furthermore, a hooking and fitting structure is respectively provided on the outer wall of the lower end of the pressing cover and the inner wall of the positioning sleeve, and the hooking and fitting structure includes a first protrusion arranged on the outer wall of the lower end of the pressing cover, and a second protrusion arranged on the inner wall of the positioning sleeve, the first protrusion has a first guiding slope, and the second protrusion has a second guiding slope. When the positioning sleeve is inserted downward into the positioning sleeve, under the action of the first guiding slope and the second guiding slope, the first protrusion on the positioning sleeve can pass over the second protrusion, so that the second protrusion is hooked and fitted with the first protrusion.

[0013] Furthermore, the outer periphery of the clamping ring is provided with a stop edge that cooperates with the lower end of the positioning sleeve, and the upper end of the clamping ring is provided with an inclined surface that gradually inclines upward from the inside to the outside along the radial direction of the clamping ring.

[0014] A method for installing a pneumatic quick-connect connector as described above, wherein the tube body is directly inserted into a pressing cover from top to bottom, and one end of the spring claw is in contact with the outer wall of the tube body and slides relatively thereto. When the tube body is inserted into place, the tube body is pulled upward, and one end of the spring claw is engaged with the outer wall of the tube body to prevent the tube body from continuing to move upward. When the pneumatic quick-connect connector needs to be removed from the tube body, the pressing cover is pressed downward, and the lower end of the pressing cover squeezes the spring claw to release the tube body.

[0015] The beneficial effects of the present invention are as follows: a pneumatic quick-connect connector of the present invention, by providing an elastic sleeve structure with a special structure, can directly insert the tube body into the hole of the pressing cover during installation. Since the spring claws of the elastic sleeve are bent downward, during the process of inserting the tube body into the pressing cover, the side of the spring claws on the elastic sleeve slides and fits with the outer wall of the tube body, and the spring claws of the elastic sleeve will not block the tube body and will not scratch the surface of the tube body. When the tube body is inserted into place, as long as the tube body is slightly pulled upward by a certain distance, the spring claws form a barb structure, and the spring claws cooperate with the outer wall of the tube body to prevent the tube body from falling off upward, thus completing the installation of the tube body. This pneumatic quick-connect connector of the present invention not only does not need to press the pressing cover during installation, but also will not scratch the outer wall of the tube body when the tube body is inserted. It can be seen that the present invention is not prone to misoperation and is not prone to scratching the outer wall of the tube body, thereby ensuring the normal use of the quick-connect connector. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings required for use in the embodiments or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative work. Those skilled in the art should understand that these drawings are not necessarily drawn to scale.

[0017] Figure 1It is a three-dimensional schematic diagram of an embodiment of a pneumatic quick-connect connector of the present invention; Figure 2 It is a main schematic diagram of an embodiment of a pneumatic quick-connect connector of the present invention; Figure 3 for Figure 2 Middle AA section view; Figure 4 for Figure 3 A magnified view of the part B in the middle; Figure 5 for Figure 3 Another state diagram of ; Figure 6 for Figure 5 A magnified view of the local C in the middle; Figure 7 An exploded view of a pneumatic quick-connect connector of the present invention; In the figure: 100, pressing cover; 101, limiting inclined surface; 102, first protrusion; 200, positioning sleeve; 201, second protrusion; 202, positioning inclined surface; 203, threaded groove; 204, clamping groove; 300, joint body; 301, limiting claw; 400, clamping ring; 401, rotating groove; 500, sealing ring; 600, elastic sleeve; 601, deformable spring sheet; 602, connecting column; 603, elastic claw; 604, threaded protrusion; 605, supporting section. DETAILED DESCRIPTION

[0018] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without making creative work are within the scope of protection of the present invention.

[0019] An embodiment of a pneumatic quick-connect connector of the present invention is as follows Figures 1 to 7 As shown, the pneumatic quick-connect connector includes a connector body 300 and a push cover 100 coaxially inserted in the connector body 300, the axes of the connector body 300 and the push cover 100 both extend in the up-down direction, an elastic sleeve 600 is provided in the connector body 300, and the elastic sleeve 600 is installed in the connector body 300 through a positioning piece, the connector body 300, the positioning piece and the push cover 100 are coaxially arranged in sequence from the outside to the inside along the radial direction of the connector body 300, and the elastic sleeve 600 is installed inside the positioning piece.

[0020] In the present invention, the cross-sectional shape of the elastic sleeve 600 is a C-shape with an opening toward the inside of the elastic sleeve 600, and the elastic sleeve 600 includes a spring claw 603, a support section 605, and a deformable spring sheet 601 arranged in sequence from top to bottom. A plurality of spring claws 603 are arranged at intervals along the circumference of the elastic sleeve 600, one end of the spring claw 603 is connected to the support section 605, and the other end is cantilevered toward the inside of the elastic sleeve 600 and bent downward, and the spring claw 603 forms a barb structure to fit with the outer wall of the tube body when the tube body is inserted downward into the joint body 300, and prevent the tube body from falling upward after the tube body is inserted into the joint body 300, and the pressing cover 100 is movably inserted in the joint body 300 up and down, and when the pressing cover 100 is pressed downward, the lower end of the pressing cover 100 squeezes the spring claw 603, so that the spring claw 603 releases the tube body.

[0021] In this embodiment, a plurality of the deformable spring pieces 601 are arranged at intervals along the circumference of the elastic sleeve 600. One end of the deformable spring piece 601 is connected to the support segment 605, and the other end is arranged obliquely toward the inside of the elastic sleeve 600. The end of the deformable spring piece 601 facing the inside of the elastic sleeve 600 is rotatably connected to the positioning member. The spring claw 603 and the support segment 605 can move up and down along the axial direction of the joint body 300. When the tube body is inserted downward into the joint body 300, the spring claw 603 drives the support segment 605 to move downward under the friction with the tube body, so that the support segment 605 squeezes the upper end of the deformable spring piece 601 downward. After being squeezed, the middle part of the deformable spring piece 601 bulges upward (such as Figure 6 In the state shown in the figure, one end of the deformable spring piece 601 facing the inside of the elastic sleeve 600 swings upward around the rotational connection position between the deformable spring piece 601 and the positioning member, and the deformable spring piece 601 forms a coil spring structure that pulls the supporting section 605 downward.

[0022] In this embodiment, the positioning member includes a positioning sleeve 200 and a clamping ring 400 disposed at the lower end of the positioning sleeve 200, the lower end of the deformable spring piece 601 is rotatably connected to the clamping ring 400, a connecting column 602 is fixed to one end of the deformable spring piece 601 facing the inside of the elastic sleeve 600, a rotating groove 401 is provided in the clamping ring 400, the connecting column 602 is rotatably installed in the rotating groove 401, and the deformable spring piece 601 is rotatably connected to the clamping ring 400 through the connecting column 602 and the rotating groove 401. In this embodiment, the rotating groove 401 is an annular groove extending circumferentially along the elastic sleeve 600, and the connecting column 602 on each deformable spring piece 601 can slide circumferentially along the annular groove.

[0023] In this embodiment, a spiral drive structure is provided between the outer wall of the support section 605 and the inner wall of the positioning sleeve 200, and the spiral drive structure includes a thread groove 203 and a thread protrusion 604. The thread groove 203 and the thread protrusion 604 are respectively arranged on the outer wall of the support section 605 and the inner wall of the positioning sleeve 200. When the support section 605 moves along the axial direction of the joint body 300, the thread drive structure can drive the elastic sleeve 600 to rotate around its own axis.

[0024] In this embodiment, a sealing ring 500 is provided in the joint body 300 below the clamping ring 400. The joint body 300 has a step surface below the sealing ring 500. The clamping ring 400 clamps and fixes the sealing ring 500 between the step surface and the clamping ring 400. A limiting claw 301 is provided at the upper end of the joint body 300 and is bent toward the inside of the joint body 300. A circle of card grooves 204 are provided on the outer wall of the positioning sleeve 200. The upper end of the limiting claw 301 is located in the card groove 204 and is positioned and matched with the inner wall of the card groove 204 to prevent the positioning sleeve 200 from falling off from the joint body 300.

[0025] In this embodiment, a hooking and matching structure is respectively provided on the outer side wall of the lower end of the pressing cover 100 and the inner side wall of the positioning sleeve 200, and the hooking and matching structure includes a first protrusion 102 provided on the outer side wall of the lower end of the pressing cover 100, and a second protrusion 201 provided on the inner wall of the positioning sleeve 200, the first protrusion 102 has a first guiding slope, and the second protrusion 201 has a second guiding slope. When the positioning sleeve 200 is inserted downward into the positioning sleeve 200, under the action of the first guiding slope and the second guiding slope, the first protrusion 102 on the positioning sleeve 200 can pass over the second protrusion 201, so that the second protrusion 201 is hooked and matched with the first protrusion 102. The outer periphery of the clamping ring 400 has a stop edge that matches the lower end stop of the positioning sleeve 200, and the upper end of the clamping ring 400 is provided with an inclined surface that gradually tilts upward from the inside to the outside along the radial direction of the clamping ring 400. The outer wall of the joint body 300 is provided with a regular hexagonal surface, which is convenient for using an operating tool to screw the joint. In order to limit the downward pressing distance of the pressing cover 100, the outer periphery of the pressing cover 100 is provided with a limiting inclined surface 101, and the limiting inclined surface 101 can be positioned and matched with the second guiding inclined surface, thereby limiting the maximum downward movement distance of the pressing cover 100. In order to limit the position of the elastic sleeve 600, the inner wall of the positioning sleeve 200 is provided with a positioning inclined surface 202 for positioning and matching with the outer wall of the support section 605.

[0026] The present invention uses an embodiment of the installation method of the above-mentioned pneumatic quick-connect connector, such as Figures 1 to 7As shown, during installation, the tube body is directly inserted into the hole of the pressing cover 100. Since the claws 603 of the elastic sleeve 600 are bent downward, during the process of inserting the tube body into the pressing cover 100, the side surfaces of the claws 603 on the elastic sleeve 600 slide and fit against the outer wall of the tube body, and the claws 603 of the elastic sleeve 600 will not block the tube body and will not scratch the surface of the tube body.

[0027] When the tube body is further inserted, due to the friction between the claw 603 of the elastic sleeve 600 and the inner wall of the tube body, the claw 603 drives the support section 605 to move down a certain distance, thereby squeezing the deformed spring sheet 601. Since the deformed spring sheet 601 is a deformable elastic sheet structure, when the claw 603 and the support section 605 move down, the deformed spring sheet 601 will be deformed by Figure 4 Become like Figure 6 In the state shown, the middle part of the deformable spring piece 601 bulges upward after being squeezed, and the end of the deformable spring piece 601 facing the inside of the elastic sleeve 600 swings upward around the rotation connection position between the deformable spring piece 601 and the positioning member, and the deformable spring piece 601 forms a coil spring structure that pulls the support section 605 downward (such as Figure 6 As the deformed spring piece 601 has the force to pull the support section 605 and the spring claw 603 downward, the overhanging end of the spring claw 603 will be spread upward, so that the spring claw 603 is easier to clamp the tube body.

[0028] At the same time, since the deformed elastic sheet 601 exerts a downward pulling force on the support section 605 and the spring claw 603, after the tube body is inserted into place, the lower end of the tube body can maintain a certain squeezing force with the joint body 300, and the tube body will not retreat. Since the connecting column 602 at the lower end of the deformed elastic sheet 601 can slide circumferentially in the rotating groove 401, when the tube body drives the spring claw 603 and the support section 605 to move downward, under the action of the spiral driving structure, the elastic sleeve 600 will rotate around its own axis, so that the spring claw 603 will scrape and clean the outer wall of the tube body to scrape off impurities on the tube body.

[0029] When the tube body is inserted in place, the tube body is slightly pulled upwards for a certain distance, and the claw 603 forms a barb structure, and the claw 603 cooperates with the outer wall of the tube body to prevent the tube body from falling upwards, and the installation of the tube body is completed. When the tube body is to be removed, the pressing cover 100 is first pressed to press the claw 603 down, so that the claw 603 releases the tube body, and the tube body can be pulled out.

[0030] The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. Any modifications, equivalent substitutions, improvements, etc. made within the spirit and principle of the present invention should be included in the protection scope of the present invention.

Claims

1. A pneumatic quick-connect connector, comprising a connector body (300) and a pressing cover (100) coaxially inserted into the connector body (300), wherein the axes of the connector body (300) and the pressing cover (100) extend in the up-down direction, and characterized in that: An elastic sleeve (600) is provided in the joint body (300), and the elastic sleeve (600) is installed in the joint body (300) via a positioning member. The cross-sectional shape of the elastic sleeve (600) is C-shaped with an opening facing the inside of the elastic sleeve (600). The elastic sleeve (600) comprises a spring claw (603), a support section (605), and a deformable spring sheet (601) which are arranged in sequence from top to bottom. A plurality of spring claws (603) are arranged at intervals along the circumference of the elastic sleeve (600), and one end of the spring claw (603) is connected to the support section (605). 05) is connected, and the other end is cantilevered toward the inside of the elastic sleeve (600) and bent downward, the spring claw (603) forms a barb structure to fit with the outer wall of the tube body when the tube body is inserted downward into the joint body (300), and prevent the tube body from falling off upward after the tube body is inserted into the joint body (300), the pressing cover (100) is movably inserted in the joint body (300) up and down, and when the pressing cover (100) is pressed downward, the lower end of the pressing cover (100) squeezes the spring claw (603), so that the spring claw (603) releases the tube body.

2. The pneumatic quick-connect connector according to claim 1, characterized in that: A plurality of deformable spring pieces (601) are arranged at intervals along the circumference of the elastic sleeve (600), one end of the deformable spring piece (601) is connected to the support section (605), and the other end is arranged obliquely toward the inside of the elastic sleeve (600), and the end of the deformable spring piece (601) facing the inside of the elastic sleeve (600) is rotatably connected to the positioning member, the spring claw (603) and the support section (605) can move up and down along the axial direction of the joint body (300), and when the pipe body is inserted downward into the joint body (300), the spring claw (603) and the support section (605) can move up and down along the axial direction of the joint body (300). 00), the claw (603) drives the support section (605) to move downward due to the friction between the claw and the tube body, so that the support section (605) presses the upper end of the deformable spring sheet (601) downward, and the middle part of the deformable spring sheet (601) bulges upward after being squeezed, and one end of the deformable spring sheet (601) toward the inside of the elastic sleeve (600) swings upward around the rotational connection position between the deformable spring sheet (601) and the positioning member, and the deformable spring sheet (601) forms a coil spring structure that pulls the support section (605) downward.

3. The pneumatic quick-connect connector according to claim 2, characterized in that: The positioning member comprises a positioning sleeve (200) and a clamping ring (400) arranged at the lower end of the positioning sleeve (200); the joint body (300), the positioning member and the pressing cover (100) are coaxially arranged in sequence from the outside to the inside; the lower end of the deformable spring piece (601) is rotatably connected to the clamping ring (400); a connecting column (602) is fixed to one end of the deformable spring piece (601) facing the inside of the elastic sleeve (600); a rotating groove (401) is provided in the clamping ring (400); the connecting column (602) is rotatably installed in the rotating groove (401); and the deformable spring piece (601) is rotatably connected to the clamping ring (400) via the connecting column (602) and the rotating groove (401).

4. The pneumatic quick-connect connector according to claim 3, characterized in that: The rotating groove (401) is an annular groove extending in the circumferential direction of the elastic sleeve (600), and the connecting column (602) on each deformable spring sheet (601) is capable of sliding in the circumferential direction of the annular groove.

5. The pneumatic quick-connect connector according to claim 4, characterized in that: A spiral drive structure is provided between the outer wall of the support section (605) and the inner wall of the positioning sleeve (200), the spiral drive structure comprising a thread groove (203) and a thread protrusion (604), the thread groove (203) and the thread protrusion (604) being respectively provided on the outer wall of the support section (605) and the inner wall of the positioning sleeve (200), and when the support section (605) moves along the axial direction of the joint body (300), the thread drive structure can drive the elastic sleeve (600) to rotate around its own axis.

6. The pneumatic quick-connect connector according to claim 3, characterized in that: A sealing ring (500) is provided inside the joint body (300) below the clamping ring (400), and a step surface is provided inside the joint body (300) below the sealing ring (500). The clamping ring (400) clamps and fixes the sealing ring (500) between the step surface and the clamping ring (400).

7. The pneumatic quick-connect connector according to claim 3, characterized in that: The upper end of the joint body (300) is provided with a limiting claw (301) bent toward the inside of the joint body (300), and the outer wall of the positioning sleeve (200) is provided with a circle of grooves (204), and the upper end of the limiting claw (301) is located in the groove (204) and is positioned and matched with the inner wall of the groove (204) to prevent the positioning sleeve (200) from falling off from the joint body (300).

8. The pneumatic quick-connect connector according to claim 3, characterized in that: A hooking and matching structure is respectively provided on the outer wall of the lower end of the pressing cover (100) and the inner wall of the positioning sleeve (200), the hooking and matching structure comprising a first protrusion (102) provided on the outer wall of the lower end of the pressing cover (100), and a second protrusion (201) provided on the inner wall of the positioning sleeve (200), the first protrusion (102) having a first guiding inclined surface, and the second protrusion (201) having a second guiding inclined surface, when the positioning sleeve (200) is inserted downward into the positioning sleeve (200), under the action of the first guiding inclined surface and the second guiding inclined surface, the first protrusion (102) on the positioning sleeve (200) can pass over the second protrusion (201), so that the second protrusion (201) and the first protrusion (102) are hooked and matched.

9. The pneumatic quick-connect connector according to claim 3, characterized in that: The outer periphery of the clamping ring (400) is provided with a stop edge that cooperates with the lower end of the positioning sleeve (200), and the upper end of the clamping ring (400) is provided with an inclined surface that gradually inclines upward from the inside to the outside along the radial direction of the clamping ring (400).

10. A method for installing a pneumatic quick-connect connector as claimed in any one of claims 1 to 9, characterized in that: The tube body is directly inserted into the pressing cover (100) from top to bottom, and one end of the spring claw (603) is in contact with the outer wall of the tube body and slides relatively thereto. When the tube body is inserted into place, the tube body is pulled upward, and one end of the spring claw (603) is engaged with the outer wall of the tube body to prevent the tube body from moving further upward. When it is necessary to remove the pneumatic quick-connect connector from the tube body, the pressing cover (100) is pressed downward, and the lower end of the pressing cover (100) squeezes the spring claw (603), so that the spring claw (603) releases the tube body.

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