Quick plug connector capable of preventing sealing ring from falling off

Abstract

The utility model belongs to the technical field of pipeline connectors, and particularly relates to a quick connector capable of preventing a sealing ring from falling off, which comprises a socket male head and a socket female head, a stepped through hole is arranged in the socket female head, a stepped sealing ring is arranged in the stepped through hole in a matched mode, and the socket male head and the socket female head are connected in a matched mode. An annular elastic supporting piece is arranged on the inner wall of the sealing ring in a tightly attached mode and used for expanding outwards to enable the sealing ring to be arranged in the stepped through hole in a tightly attached mode. The socket male head is inserted into the stepped through hole, and the bottom end of the socket male head is tightly attached to the sealing ring. The joint can ensure that the sealing ring is firmly fixed and does not fall off in the frequent plugging process of the socket male head and the socket female head, so that the plugging convenience and sealing performance are ensured.

Description

Technical Field

[0001] The utility model belongs to the technical field of pipeline joints, and in particular relates to a quick connector for preventing the sealing ring from falling off. Background Technique

[0002] In various fields, pipeline connection is basically involved. Two pipelines need to be connected by a joint to transport fluid media. To ensure the sealing performance of the connection between the two pipelines and to ensure the convenience and speed of connection, a socket-and-plug type joint design is generally adopted, which generally includes: a male head, a female head, a sealing ring, etc.

[0003] At present, the following defects exist in the application of the pipeline socket-and-plug joints on the market:

[0004] During the frequent plugging and unplugging process of the socket-and-plug male head and the socket-and-plug female head, the sealing ring will fall off. That is, every time the socket-and-plug connection is made, it is necessary to ensure that the sealing ring is installed in place, and the sealing ring needs to be installed every time, resulting in cumbersome socket-and-plug operation; moreover, once the sealing ring detaches, it will cause the leakage of the medium (such as compressed air), resulting in a large amount of energy waste. Content of the Utility Model

[0005] Aiming at the technical problems existing in the background technique, the utility model provides a quick connector for preventing the sealing ring from falling off, which can ensure that the sealing ring is firmly fixed and does not fall off during the frequent plugging and unplugging process of the socket-and-plug male head and the socket-and-plug female head, thereby ensuring the convenience and sealing performance of the plugging.

[0006] To achieve the above purpose, the technical solution provided by the utility model is as follows:

[0007] A quick connector for preventing the sealing ring from falling off, including a socket-and-plug male head and a socket-and-plug female head. A stepped through hole is provided inside the socket-and-plug female head, and a stepped sealing ring is cooperatively arranged in the stepped through hole. An annular elastic support member is closely arranged on the inner wall of the sealing ring. The elastic support member is used for outward expansion to make the sealing ring closely arranged in the stepped through hole; the socket-and-plug male head is inserted into the stepped through hole, and the bottom end of the socket-and-plug male head is closely arranged against the sealing ring.

[0008] Optionally, the sealing ring includes a first annular part and a second annular part which are integrally connected, and the outer diameter of the first annular part is greater than the outer diameter of the second annular part.

[0009] Optionally, a pressure ring is provided at the bottom end of the socket-and-plug male head, and the pressure ring is closely arranged against the first annular part.

[0010] Optionally, a limiting ring is arranged on the inner wall at the bottom end of the second annular part, and the elastic support member is arranged on the limiting ring.

[0011] Optionally, the elastic support member is a C-shaped snap ring.

[0012] Optionally, the socket female head includes a first connection portion, a first sliding portion, and a second sliding portion. An annular clamping groove is provided on the inner wall of the first connection portion, and an annular limiting portion is provided on the outer wall of the second annular portion. The limiting portion is clamped in the clamping groove.

[0013] Optionally, the quick-connect fitting for preventing the sealing ring from falling off further includes a locking ring. A first abutting ring is provided on the inner wall of the locking ring. The locking ring is slidably arranged close to the first sliding portion, and the first abutting ring is slidably arranged close to the second sliding portion. A spring is provided between the first abutting ring and the first sliding portion. A plurality of sliding holes are provided on the circumference of the second sliding portion, and balls are arranged in the sliding holes. An annular limiting groove and a second abutting ring are provided on the circumference of the socket male head. The limiting groove is arranged above the second abutting ring. When the pressing ring is close to the first annular portion, the first abutting ring, the sliding holes, and the limiting groove are aligned, and the balls are clamped in the limiting groove.

[0014] Optionally, an anti-detachment ring is provided on the outer wall of the upper end of the second sliding portion.

[0015] Optionally, a second connection portion is provided at the upper end of the socket male head, and the bottom end of the second connection portion is closely arranged against the anti-detachment ring.

[0016] Optionally, the cross-section of the limiting groove is arranged in a conical shape.

[0017] The utility model has the following advantages and beneficial effects:

[0018] The utility model provides a quick-connect fitting for preventing the sealing ring from falling off, which can ensure that the sealing ring is firmly fixed and does not fall off during the frequent plugging and unplugging process of the socket male head and the socket female head, thereby ensuring the convenience and sealing performance of the plugging. By providing a stepped sealing ring, an annular elastic support member is closely arranged on the inner wall of the sealing ring. The elastic support member is used for outward expansion to make the sealing ring closely arranged in the stepped through hole. Such a design can prevent the sealing ring from falling off, is suitable for frequent plugging and unplugging of the joint, prevents leakage of pipeline medium, and greatly avoids medium loss. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] Figure 1 is a structural diagram of the quick-connect fitting for preventing the sealing ring from falling off provided by the utility model;

[0020] Figure 2 is a cross-sectional view of the quick-connect fitting for preventing the sealing ring from falling off provided by the utility model;

[0021] Figure 3 is Figure 2 a cross-sectional view of the separation of the socket male head and the socket female head in

[0022] Figure 4Structural diagram of the socket female head provided by the present utility model;

[0023] Figure 5 Cross-sectional view of the socket female head provided by the present utility model;

[0024] Figure 6 Half-sectional structural diagram of the locking ring provided by the present utility model;

[0025] Figure 7 Half-sectional structural diagram of the sealing ring provided by the present utility model;

[0026] Figure 8 is Figure 7 top view of;

[0027] Figure 9 Structural diagram of the socket male head provided by the present utility model;

[0028] Icon: 1 - socket female head, 11 - first connection part, 12 - first sliding part, 13 - second sliding part, 14 - stepped through hole, 15 - sliding hole, 16 - anti - detachment ring, 17 - card slot, 18 - connection head, 19 - inclined plane, 2 - locking ring, 21 - first abutting ring, 22 - upper inner hole, 23 - lower inner hole, 24 - spring, 3 - socket male head, 31 - limiting groove, 32 - second abutting ring, 33 - second connection part, 34 - pressing ring, 5 - sealing ring, 51 - first annular part, 52 - second annular part, 53 - limiting part, 54 - limiting ring, 55 - elastic support, 6 - ball. Detailed implementation manners

[0029] To make the objectives, technical solutions and advantages of the embodiments of the present utility model clearer, the technical solutions in the embodiments of the present utility model will be clearly and completely described below with reference to the accompanying drawings in the embodiments of the present utility model. Obviously, the described embodiments are some, but not all, of the embodiments of the present utility model.

[0030] Therefore, the following detailed description of the embodiments of the present utility model provided in the drawings is not intended to limit the scope of the claimed present utility model, but merely represents selected embodiments of the present utility model. All other embodiments obtained by those of ordinary skill in the art based on the embodiments of the present utility model without creative efforts fall within the scope of protection of the present utility model.

[0031] Embodiment

[0032] As Figures 1 to 9 shown, a quick - plug connector for preventing the sealing ring from falling off includes components such as a socket male head 3, a socket female head 1, and a locking ring 2.

[0033] As Figures 1 to 9As shown in the figure, a stepped through-hole 14 is provided inside the socket female head 1, and a stepped sealing ring 5 is fitted in the stepped through-hole 14. An annular elastic support member 55 is closely arranged on the inner wall of the sealing ring 5. The elastic support member 55 is used to expand outward so that the sealing ring 5 is closely arranged in the stepped through-hole 14. The socket male head 3 is also arranged in a stepped shape. The socket male head 3 is inserted into the stepped through-hole 14, and the bottom end of the socket male head 3 is closely arranged against the sealing ring 5.

[0034] The utility model provides a quick-connect joint for preventing the sealing ring from falling off, which can ensure that the sealing ring 5 is firmly fixed and will not fall off during the frequent plugging and unplugging process of the socket male head 3 and the socket female head 1, thereby ensuring the convenience and tightness of the plugging. By providing the stepped sealing ring 5, an annular elastic support member 55 is closely arranged on the inner wall of the sealing ring 5. The elastic support member 55 is used to expand outward so that the sealing ring 5 is closely arranged in the stepped through-hole 14. With such a design, the sealing ring 5 can be prevented from falling off, which is suitable for frequent plugging and unplugging of the joint, preventing the leakage of pipeline medium and greatly avoiding the loss of medium.

[0035] Furthermore, the sealing ring 5 includes a first annular portion 51 and a second annular portion 52 which are integrally connected. The outer diameter of the first annular portion 51 is larger than the outer diameter of the second annular portion 52. By the stepped sealing ring 5, the contact sealing area can be increased, thereby increasing the tightness. Secondly, the setting of the second annular portion 52 is used not only for realizing the sealed connection but also for installing the elastic support member 55.

[0036] Furthermore, a pressure ring 34 is arranged at the bottom end of the socket male head 3. The pressure ring 34 is closely arranged against the first annular portion 51, thereby providing a tight compaction, pressing the first annular portion 51 and increasing the tightness.

[0037] Furthermore, a limiting ring 54 is arranged on the inner wall at the bottom end of the second annular portion 52. The elastic support member 55 is arranged on the limiting ring 54, which is used for limiting and fixing the elastic support member 55. At the same time, it is convenient to install the elastic support member 55 so that it is clamped on the inner wall of the second annular portion 52.

[0038] Furthermore, the elastic support member 55 is a C-shaped snap ring, as Figure 8 shown in the figure. This kind of snap ring is convenient for installation and removal, and at the same time, a good support and fixing effect can be achieved.

[0039] Furthermore, the socket female head 1 includes a first connecting portion 11, a first sliding portion 12 and a second sliding portion 13. A connecting head 18 is arranged at the bottom end of the first connecting portion 11. The connecting head 18 has a thread inside for connecting with the pipeline. An annular clamping groove 17 is arranged on the inner wall of the first connecting portion 11. An annular limiting portion 53 is arranged on the outer wall of the second annular portion 52. The limiting portion 53 is clamped in the clamping groove 17, further increasing the limiting and fixing effect of the sealing ring 5 and at the same time increasing the tightness.

[0040] Preferably, the installation position of the elastic support member 55 and the position of the limiting portion 53 are located on the same horizontal plane, that is, the elastic support member 55 can make the limiting portion 53 be clamped more tightly in the card slot 17.

[0041] Further, a first abutting ring 21 is provided on the inner wall of the locking ring 2. The upper part of the first abutting ring 21 is an upper inner hole 22, and the lower part of the first abutting ring 21 is a lower inner hole 23. The locking ring 2 is slidably arranged close to the first sliding portion 12, and the first abutting ring 21 is slidably arranged close to the second sliding portion 13; a spring 24 is arranged in the cavity between the first abutting ring 21 and the first sliding portion 12. One end of the spring 24 is connected to the first abutting ring 21, and the other end is connected to the first sliding portion 12. A plurality of sliding holes 15 are arranged on the circumference of the second sliding portion 13, and balls 6 are arranged in the sliding holes 15. An annular limiting groove 31 and a second abutting ring 32 are arranged on the circumference of the male socket 3. The limiting groove 31 is arranged above the second abutting ring 32.

[0042] As Figure 2 shown, when the pressing ring 34 abuts closely against the first annular portion 51, the first abutting ring 21, the sliding holes 15, and the limiting groove 31 are aligned, the balls 6 are clamped in the limiting groove 31, and the spring 24 naturally extends and is not compressed, realizing the connection between the female socket 1 and the male socket 3.

[0043] As Figure 3 shown, when it is necessary to pull out the male socket 3, press the locking ring 2, the spring 24 is compressed, so that the first abutting ring 21 moves away from the balls 6, and then pull out the male socket 3, so that the second abutting ring 32 presses the balls 6, and the balls 6 disengage from the limiting groove 31 and reach into the upper inner hole 22. At this time, the male socket 3 can be pulled out.

[0044] Similarly, when it is necessary to install the male socket 3, press the locking ring 2, the spring 24 is compressed, so that the first abutting ring 21 moves away from the balls 6, and then insert the male socket 3, so that the limiting groove 31 is aligned with the balls 6, and then release the locking ring 2. The spring 24 resets and drives the locking ring 2 to move upward, so that the first abutting ring 21 presses the balls 6, and the balls 6 disengage from the upper inner hole 22 and enter the limiting groove 31 to realize fixation.

[0045] Further, an anti - detachment ring 16 is provided on the outer wall at the upper end of the second sliding portion 13 to prevent the locking ring 2 from falling off.

[0046] Further, a second connecting portion 33 is provided at the upper end of the male socket 3. A thread is provided in the second connecting portion 33 for connection with a pipeline. The bottom end of the second connecting portion 33 abuts closely against the anti - detachment ring 16.

[0047] Further, the cross - section of the limiting groove 31 is arranged in a conical shape.

[0048] Preferably, the cross-section of the second abutting ring 32 is set to a conical shape, and the inner wall of the stepped through-hole 14 is set to a corresponding inclined surface 19 for avoiding the second abutting ring 32 when inserting and connecting the male connector 3 to avoid interference.

[0049] Preferably, the upper and lower chamfers of the first abutting ring 21 are provided.

[0050] Preferably, the sliding hole 15 is set as a stepped through-hole or a conical hole with a gradually changing diameter, so that the ball 6 is arranged in the sliding hole 15 and will not fall off from the inner side of the sliding hole 15 and enter the inside of the female connector 1.

[0051] The above are only the preferred embodiments of the present invention and are not intended to limit the present invention. For those skilled in the art, the present invention can have various changes and modifications. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present invention shall be included in the protection scope of the present invention.

Claims

1. A quick connector for preventing the sealing ring from falling off, characterized in that : It includes a socket male head and a socket female head. A stepped through-hole is provided inside the socket female head, and a stepped sealing ring is fitted in the stepped through-hole. An annular elastic support member is closely arranged on the inner wall of the sealing ring, and the elastic support member is used to expand outward so that the sealing ring is closely arranged in the stepped through-hole; the socket male head is inserted into the stepped through-hole, and the bottom end of the socket male head is closely arranged against the sealing ring.

2. The quick-connect fitting for preventing the sealing ring from falling off according to claim 1, wherein: The sealing ring includes a first annular part and a second annular part which are integrally connected, and the outer diameter of the first annular part is larger than that of the second annular part.

3. The quick-connect fitting for preventing the sealing ring from falling off according to claim 2, wherein: A pressing ring is arranged at the bottom end of the socket male head, and the pressing ring is closely arranged against the first annular part.

4. The quick connector for preventing the sealing ring from falling off according to claim 3, characterized in that: A limiting ring is arranged on the inner wall of the bottom end of the second annular part, and the elastic support member is arranged on the limiting ring.

5. The quick-connect fitting for preventing the sealing ring from falling off according to claim 4, wherein: The elastic support member is a C-shaped snap ring.

6. The quick connector for preventing the sealing ring from falling off according to claim 5, characterized in that: The socket female head includes a first connecting part, a first sliding part and a second sliding part. An annular clamping groove is arranged on the inner wall of the first connecting part, and an annular limiting part is arranged on the outer wall of the second annular part. The limiting part is clamped in the clamping groove.

7. The quick connector for preventing the sealing ring from falling off according to claim 5, characterized in that: It further includes a locking ring. A first abutting ring is arranged on the inner wall of the locking ring. The locking ring is slidably arranged closely against the first sliding part, and the first abutting ring is slidably arranged closely against the second sliding part; a spring is arranged between the first abutting ring and the first sliding part; a plurality of sliding holes are arranged on the circumference of the second sliding part, and balls are arranged in the sliding holes; an annular limiting groove and a second abutting ring are arranged on the circumference of the socket male head, and the limiting groove is arranged above the second abutting ring; when the pressing ring is closely arranged against the first annular part, the first abutting ring, the sliding holes and the limiting groove are aligned, and the balls are clamped in the limiting groove.

8. The quick-connect fitting for preventing the sealing ring from falling off according to claim 7, characterized in that: An anti-disengagement ring is arranged on the outer wall of the upper end of the second sliding part.

9. The quick-connect fitting for preventing the sealing ring from falling off according to claim 8, wherein: A second connecting part is arranged at the upper end of the socket male head, and the bottom end of the second connecting part is closely arranged against the anti-disengagement ring.

10. The quick-connect fitting for preventing the sealing ring from falling off according to claim 7, wherein: The cross-section of the limiting groove is arranged in a conical shape.

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