Connecting and separating device capable of achieving rapid insertion

Abstract

The connecting and separating device comprises an upper connector, a lower connector and a self-locking ball device, when the upper connector and the lower connector are in butt joint and locked through the self-locking ball device, a through flow channel is formed in the upper connector and the lower connector, and sealing is recovered after the upper connector and the lower connector are separated. According to the invention, the structure is compact, the circulation and closing of a flow channel can be quickly realized, the upper and lower joints have independent sealing functions, the plug-in connection can be realized immediately, the separation can be realized immediately, the plug-in connection operation is convenient, no extra tool is needed, the joints are convenient to replace, the maintenance is convenient, and the through-flow and sealing of gas can be well met.

Description

Technical Field

[0001] The invention belongs to the technical field of self-locking valves, and in particular relates to a quick-connect connection and separation device. Background Art

[0002] Self-locking valves play an important role in industrial production, particularly in situations where strict control of fluid flow is required to prevent leakage or misoperation. For example, in the storage and transportation of toxic, flammable, or explosive substances, self-locking valves can provide additional safety measures to prevent leakage accidents caused by human error or equipment failure.

[0003] The working principle of a self-locking valve relies primarily on its internal mechanical structure. When the valve is closed, a special locking mechanism is activated, securing the valve in the closed position. This locking mechanism typically consists of a spring, a locking tongue, and a locking groove. When the valve is fully closed, the locking tongue automatically snaps into the locking groove, automatically locking the valve. Connector and disconnect devices are primarily used in piping systems. Currently, most connector and disconnect devices use threaded locking. While this provides a reliable seal, it lacks quick plug-in functionality, resulting in inefficient piping connections. Summary of the Invention

[0004] The technical problem solved by the present invention is to provide a quick plug-in connection and separation device, which adopts a reverse unloading structure and solves the problem of the contradiction between high pressure and large flow.

[0005] The technical solution adopted by the present invention is: a quick-connect connection and separation device, comprising an upper joint, a lower joint and a self-locking ball device, wherein when the upper joint and the lower joint are connected and locked by the self-locking ball device, a through flow channel is formed in the upper joint and the lower joint, and when the upper joint and the lower joint are separated, each joint restores its seal; The upper joint includes an upper inner sleeve, an upper valve core and a first spring. The front end of the upper inner sleeve is fixedly connected to the air inlet threaded tube. The upper valve core is sleeved in the upper inner sleeve. The rear end of the upper valve core is flush with the rear end of the upper inner sleeve. The side wall of the upper valve core and the inner wall of the cavity of the upper inner sleeve are provided with matching slope surfaces for limiting the rear end of the upper valve core and closing the flow channel. A spring mounting groove is machined on the front end of the upper valve core. One end of the first spring presses against the end surface of the air inlet threaded tube and the other end presses against the bottom of the spring mounting groove. A groove is machined at the center of the rear end surface of the upper valve core. The lower joint includes a lower inner sleeve, a lower valve core and a second spring. The rear end of the lower inner sleeve is fixedly connected to the air outlet threaded tube. Ball grooves are evenly distributed along the circumference of the front side wall of the lower inner sleeve. The lower valve core is sleeved in the lower inner sleeve. The side wall of the lower valve core and the inner wall of the cavity of the lower inner sleeve are provided with matching slope surfaces for limiting the front end of the lower valve core and closing the flow channel. A spring mounting groove is processed on the rear end of the lower valve core. One end of the second spring presses against the end surface of the air outlet threaded tube and the other end presses against the bottom of the spring mounting groove. The front end of the lower valve core is a convex rod, and the convex rod is adapted to the shape of the groove. The self-locking ball device includes a self-locking sleeve, a third spring, a limiting ring and a steel ball. The self-locking sleeve and the limiting ring are both sleeved on the outside of the lower inner sleeve. The front end of the self-locking sleeve is flush with the front end of the lower inner sleeve. The limiting ring is located on the rear side of the self-locking sleeve. The limiting ring is fixedly connected to the lower inner sleeve by screws. The steel ball is installed in the ball groove. The third spring is installed between the self-locking sleeve and the limiting ring. The inner wall of the front end of the self-locking sleeve is processed with an annular groove. When the third spring is compressed to make the end face of the self-locking sleeve press against the end face of the limiting ring, the annular groove is just located on the outside of the ball groove.

[0006] Preferably, the groove on the rear end face of the upper valve core is a sloped groove with a large opening and a small bottom, and the corresponding front end shape of the protruding rod of the lower valve core matches the concave and convex shape of the groove.

[0007] Preferably, an annular groove is machined on the outer wall of the upper inner sleeve, and the annular groove is used for the steel ball to fall into the annular groove when the upper joint and the lower joint are docked to achieve locking of the upper joint and the lower joint.

[0008] Preferably, the protruding rod protrudes from the docking end surface of the upper inner sleeve and the lower inner sleeve. When docking, the protruding rod and the groove contact and compress the second spring and the first spring respectively to move the lower valve core backward and the upper valve core forward to open the flow channel.

[0009] Preferably, a sealing ring is installed between the upper inner sleeve and the upper valve core, a sealing ring is installed between the lower inner sleeve and the lower valve core, and a sealing ring is installed between the lower inner sleeve and the upper inner sleeve.

[0010] Preferably, the ball groove is a cylindrical hole with the same diameter as the steel ball on the side facing the self-locking sleeve, and the opposite side is an arc hole adapted to the spherical surface for limiting the position of the steel ball.

[0011] The beneficial effects of the present invention are: the present invention has a compact structure, can quickly realize the circulation and closing of the flow channel, and at the same time the upper and lower joints have independent sealing functions, plug in to open and separate to close, the plug-in operation is convenient and does not require additional tooling, it is easy to replace the joints, and it is convenient to maintain, which can well meet the flow and sealing of the gas. BRIEF DESCRIPTION OF THE DRAWINGS

[0012] Figure 1 Schematic diagram of the upper joint structure.

[0013] Figure 2 Schematic diagram of the lower joint structure.

[0014] Figure 3 It is a structural diagram when the upper joint and the lower joint are connected.

[0015] Figure 4 It is a structural diagram when the upper joint and the lower joint are separated.

[0016] Figure markings: 1-inlet threaded tube, 2-upper inner sleeve, 3-upper valve core, 4-first spring, 5-lower inner sleeve, 6-self-locking sleeve, 7-lower valve core, 8-third spring, 9-outlet threaded tube, 10-screw, 11-second spring, 12-limiting ring, 13-steel ball, 601-ring groove. DETAILED DESCRIPTION

[0017] To make the objectives, technical solutions, and advantages of the present invention more clearly understood, the present invention will be further described in detail below in conjunction with the following embodiments. It should be understood that the specific embodiments described herein are intended only to explain the present invention and are not intended to limit the present invention. The "front end" described herein refers to the end near the air inlet threaded pipe 1, and the "rear end" refers to the end near the air outlet threaded pipe 9.

[0018] The principle of the present invention is that the connecting and disconnecting device is divided into an upper connector and a lower connector. When the upper and lower connectors are connected, the internal valve core opens, enabling rapid connection of the plug-in device. When the upper and lower connectors are disconnected, the internal valve core automatically returns to its original position, closing the plug-in device. The upper and lower connectors can be quickly connected by manually disengaging the self-locking sleeve (6).

[0019] like Figure 1 and Figure 2 As shown, a quick-connect connection and separation device includes an upper joint, a lower joint and a self-locking ball device. The upper joint includes an upper inner sleeve 2, an upper valve core 3 and a first spring 4. The front end of the upper inner sleeve 2 is welded to the air intake threaded pipe 1 to ensure structural strength and sealing. The upper valve core 3 is nestled within the upper inner sleeve 2. The rear end of the upper valve core 3 is flush with the rear end surface of the upper inner sleeve 2. The side walls of the upper valve core 3 and the inner wall of the cavity of the upper inner sleeve 2 are provided with matching slopes to limit the rear end direction of the upper valve core 3 and seal the flow channel. A spring mounting groove is machined into the front end of the upper valve core 3. One end of a first spring 4 presses against the end surface of the inlet threaded tube 1 located inside the upper inner sleeve 2, while the other end presses against the bottom of the spring mounting groove. The elastic force of the first spring 4 presses the side walls of the upper valve core 3 against the inner wall of the cavity of the upper inner sleeve 2. When subjected to force, the first spring 4 is further compressed, causing the upper valve core 3 to move forward, thereby creating a gap between the side walls of the upper valve core 3 and the inner wall of the cavity of the upper inner sleeve 2, opening the flow channel. A groove is machined into the center of the rear end surface of the upper valve core 3. The groove on the rear end surface of the upper valve core 3 is a sloped groove with a large opening and a small bottom. The corresponding shape of the front end of the protruding rod of the lower valve core matches the groove. An O-ring is installed between the upper inner sleeve 2 and the upper valve core 3.

[0020] like Figure 2As shown, the lower joint includes a lower inner sleeve 5, a lower valve core 7, and a second spring 11. The lower inner sleeve 5 is an annular structure. From front to back, its inner wall is machined with a ball groove 501, a sealing ring mounting groove 502, a butt end face 503, and a ramped surface 504. The rear end of the lower inner sleeve 5 is welded to the air outlet threaded pipe 9, ensuring both structural strength and sealing. An O-ring is installed in the sealing ring mounting groove 502 of the lower inner sleeve 5 to seal the upper inner sleeve when the upper inner sleeve is inserted. Ball grooves 501 are evenly distributed along the circumference of the front sidewall of the lower inner sleeve 5. The side of the ball groove 501 facing the self-locking sleeve 6 is a cylindrical through-hole with the same diameter as the steel ball 13. The opposite side is an arc hole that matches the spherical surface of the steel ball 13 to limit the steel ball's position, ensuring that the steel ball remains stable in the ball groove when the self-locking sleeve 6 is reset. The spherical surface of the steel ball 13 protrudes from the inner sidewall of the lower inner sleeve 5 for locking. The lower valve core 7 is sleeved in the lower inner sleeve 5, and the side wall of the lower valve core 7 and the inner wall of the cavity of the lower inner sleeve 5 are provided with a matching slope surface 504 for limiting the front end direction of the lower valve core 7 and closing the flow channel. A spring mounting groove is processed at the rear end of the lower valve core 7, and one end of the second spring 11 is pressed against the end surface of the air outlet threaded tube 9 and the other end is pressed against the bottom of the spring mounting groove. The side wall of the lower valve core 7 is pressed against the slope surface 504 of the inner wall of the cavity of the lower inner sleeve 5 by the elastic force of the second spring 11. When subjected to force, the second spring 11 is further compressed to move the lower valve core 7 to the rear end, thereby creating a distance between the side wall of the lower valve core 7 and the inner wall of the cavity of the lower inner sleeve 5 to open the flow channel. The front end of the lower valve core 7 is a protruding rod that matches the shape of the groove. The protruding rod protrudes from the docking end surface 503 of the lower inner sleeve 5. When docked, the rear end surface of the upper inner sleeve 2 abuts against the docking end surface 503 of the lower inner sleeve 5. After the protruding rod and the groove dock, they respectively compress the second spring 11 and the first spring 4, causing the lower valve core 7 to move rearward and the upper valve core 3 to move forward, thereby clearing the flow channel. An O-ring is installed between the lower inner sleeve 5 and the lower valve core 7.

[0021] like Figure 2As shown, the self-locking ball device includes a self-locking sleeve 6, a third spring 8, a limiting ring 12 and a steel ball 13. The self-locking sleeve 6 and the limiting ring 12 are both sleeved on the outside of the lower inner sleeve 5. When the self-locking sleeve 6 is reset, the front end of the self-locking sleeve 6 is flush with the front end of the lower inner sleeve 5. The limiting ring 12 is located at the rear side of the self-locking sleeve 6 and is spaced a certain distance from the self-locking sleeve 6. The limiting ring 12 is fixedly connected to the lower inner sleeve 5 by a screw 10. The steel ball 13 is installed in the ball groove. A third spring 8 is installed between the self-locking sleeve 6 and the limiting ring 12. Spring 8. When the third spring 8 is compressed, the self-locking sleeve 6 moves toward the limit ring 12 until the end face of the self-locking sleeve 6 hits the upper limit of the limit ring 12. The front inner wall of the self-locking sleeve 6 is machined with an annular groove. When the third spring 8 is compressed and the end face of the self-locking sleeve 6 hits the end face of the limit ring 12, the annular groove is exactly outside the ball groove, releasing the radial constraint of the steel ball 13. When the elastic force of the compressed third spring 8 is released, the self-locking sleeve 6 is reset, and the inner wall of the self-locking sleeve 6 fits into the ball groove to radially constrain the steel ball 13. The outer wall of the upper inner sleeve is machined with an annular groove. The annular groove is used for the steel ball 13 to fall into the annular groove when the upper and lower joints are connected, thereby locking the upper and lower joints.

[0022] When the upper joint and the lower joint are plugged in, the self-locking sleeve 6 is moved backward to the limit ring 12, and the upper inner sleeve 2 is inserted into the lower inner sleeve 5. The side wall of the upper inner sleeve 2 pushes the steel ball 13 out of the annular groove of the self-locking sleeve 6, and the groove of the upper valve core 3 is docked with the convex rod of the lower valve core 7 and continues to compress the first spring 4 and the second spring 11. The upper valve core 3 moves forward and the lower valve core 7 moves backward until the rear end face of the upper inner sleeve 2 is against the docking end face 503 of the lower inner sleeve 5. At this time, the upper and lower joints are plugged in place, and then the self-locking sleeve 6 is reset. The steel ball 13 is restricted by the inner wall of the self-locking sleeve 6 and moves inward until the spherical surface of the steel ball 13 falls into the annular groove of the outer wall of the upper inner sleeve 2, limiting the axial movement of the upper inner sleeve 2 and the lower inner sleeve 5. The upper joint and the lower joint are completed, the valve core is opened, and a through flow channel from the air inlet threaded pipe 1 to the air outlet threaded pipe 9 is formed.

[0023] When the upper and lower joints are separated, the self-locking sleeve 6 is moved backward to the limit ring 12, and the radial constraint of the steel ball 13 disappears. After the upper joint is pulled out, the self-locking sleeve 6 is reset, and the upper and lower joints are separated. After separation, the pressure of the first spring 4 inside the valve core of the upper joint is released. Under the action of the spring force, the first spring 4 pushes the upper valve core 3 backward to the point where the side wall of the upper valve core 3 contacts the inner wall of the cavity of the upper inner sleeve 2, and the flow channel is sealed through the O-ring. Similarly, the pressure of the second spring 11 inside the valve core of the lower joint is released. Under the action of the spring force, the second spring 11 pushes the lower valve core 7 forward to the point where the side wall of the lower valve core 7 contacts the slope surface 504 of the inner wall of the cavity of the lower inner sleeve 5, and the flow channel is sealed through the O-ring.

[0024] The above are specific embodiments of the present invention and the technical principles used. Any modifications or equivalent transformations based on the technical solutions of the present invention should be included in the scope of protection of the present invention.

Claims

1. A quick-connect connection and separation device, characterized in that: It includes an upper joint, a lower joint and a self-locking ball device. When the upper joint and the lower joint are connected and locked by the self-locking ball device, a through flow channel is formed in the upper joint and the lower joint. When the upper joint and the lower joint are separated, each joint restores its seal. The upper joint includes an upper inner sleeve, an upper valve core and a first spring. The front end of the upper inner sleeve is fixedly connected to the air inlet threaded tube. The upper valve core is sleeved in the upper inner sleeve. The rear end of the upper valve core is flush with the rear end of the upper inner sleeve. The side wall of the upper valve core and the inner wall of the cavity of the upper inner sleeve are provided with matching slope surfaces for limiting the rear end of the upper valve core and closing the flow channel. A spring mounting groove is machined on the front end of the upper valve core. One end of the first spring presses against the end surface of the air inlet threaded tube and the other end presses against the bottom of the spring mounting groove. A groove is machined at the center of the rear end surface of the upper valve core. The lower joint includes a lower inner sleeve, a lower valve core and a second spring. The rear end of the lower inner sleeve is fixedly connected to the air outlet threaded tube. Ball grooves are evenly distributed along the circumference of the front side wall of the lower inner sleeve. The lower valve core is sleeved in the lower inner sleeve. The side wall of the lower valve core and the inner wall of the cavity of the lower inner sleeve are provided with matching slope surfaces for limiting the front end of the lower valve core and closing the flow channel. A spring mounting groove is processed on the rear end of the lower valve core. One end of the second spring presses against the end surface of the air outlet threaded tube and the other end presses against the bottom of the spring mounting groove. The front end of the lower valve core is a convex rod, and the convex rod is adapted to the shape of the groove. The self-locking ball device includes a self-locking sleeve, a third spring, a limiting ring and a steel ball. The self-locking sleeve and the limiting ring are both sleeved on the outside of the lower inner sleeve. The front end of the self-locking sleeve is flush with the front end of the lower inner sleeve. The limiting ring is located on the rear side of the self-locking sleeve. The limiting ring is fixedly connected to the lower inner sleeve by screws. The steel ball is installed in the ball groove. The third spring is installed between the self-locking sleeve and the limiting ring. The inner wall of the front end of the self-locking sleeve is processed with an annular groove. When the third spring is compressed to make the end face of the self-locking sleeve press against the end face of the limiting ring, the annular groove is just located on the outside of the ball groove.

2. A quick-connect connection and separation device according to claim 1, characterized in that: The groove on the rear end surface of the upper valve core is a sloped groove with a large opening and a small bottom, and the shape of the front end of the corresponding protruding rod of the lower valve core matches the concave and convex shape of the groove.

3. A quick-connect connection and separation device according to claim 1, characterized in that: The outer wall of the upper inner sleeve is processed with an annular groove, and the annular groove is used for the steel ball to fall into the annular groove when the upper joint and the lower joint are connected to each other to achieve locking of the upper joint and the lower joint.

4. A quick-connect connection and separation device according to claim 1, characterized in that: The protruding rod protrudes from the butt joint surface of the upper inner sleeve and the lower inner sleeve. When the protruding rod contacts the groove, the second spring and the first spring are respectively compressed to move the lower valve core backward and the upper valve core forward to open the flow channel.

5. The quick-connect connection and separation device according to claim 1, characterized in that: A sealing ring is installed between the upper inner sleeve and the upper valve core, a sealing ring is installed between the lower inner sleeve and the lower valve core, and a sealing ring is installed between the lower inner sleeve and the upper inner sleeve.

6. A quick-connect connection and separation device according to claim 1, characterized in that: The side of the ball groove facing the self-locking sleeve is a cylindrical hole with the same diameter as the steel ball, and the opposite side is an arc hole adapted to the spherical surface for limiting the position of the steel ball.

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