An L-type pneumatic quick-connect connector

Abstract

The utility model discloses an L-shaped pneumatic quick-insert connector, which includes a straight connector, an L-shaped connector, and a quick-insert assembly arranged on the L-shaped connector, wherein the straight connector is provided with a nut portion, and the outer wall of the straight connector is also provided with a first protrusion and a second protrusion, which are located above the nut portion, and the L-shaped connector is threadedly connected to the straight connector, and the L-shaped connector is provided with a third protrusion, which abuts against the first protrusion. The utility model forms a labyrinth seal between the L-shaped connector and the straight connector through the cooperation of the first protrusion, the second protrusion and the third protrusion, and further seals it through a plurality of first sealing rings, and the first sealing ring not only improves the sealing performance, but also prevents the increase of air leakage due to the aging of one of the first sealing rings, so that the product has the advantages of good sealing performance and long service life.

Description

Technical Field

[0001] The utility model relates to the technical field of joints, in particular to an L-shaped pneumatic quick-plug joint. Background Art

[0002] Pneumatic quick-connect fittings are quick-connect connector components used to connect pneumatic tools and air sources, and are used to provide compressed air from the air source to pneumatic tools. Pneumatic quick-connect fittings are widely used in ventilation equipment such as air pipelines, air compressors, grinders, air drills, impact wrenches, and air screwdrivers because of their easy assembly and disassembly and strong versatility.

[0003] The existing L-shaped pneumatic quick-connect connector is usually composed of a straight connector and an L-shaped connector. The L-shaped connector is threadedly connected to one end of the straight connector. A sealing ring is usually provided at the connection between the L-shaped connector and the straight connector. However, after long-term use, the sealing ring ages, which may cause gas leakage at the connection between the two. Therefore, the applicant has made a beneficial design and found a solution to the above problem. The technical solution to be introduced below is produced in this context. Summary of the invention

[0004] The purpose of the utility model is to overcome the shortcomings of the above-mentioned traditional L-shaped pneumatic quick-plug connector design and provide a product with good sealing performance and long service life.

[0005] To solve the above problems, the utility model adopts the following technical solutions.

[0006] An L-shaped pneumatic quick-insert connector comprises a straight-through connector, an L-shaped connector, and a quick-insert assembly arranged on the L-shaped connector, wherein the straight-through connector is provided with a nut portion, and the outer wall of the straight-through connector is also provided with a first protrusion and a second protrusion, which are located above the nut portion, the L-shaped connector is threadedly connected to the straight-through connector, the L-shaped connector is provided with a third protrusion, which abuts against the first protrusion, and a first sealing ring is provided between the first protrusion and the second protrusion, and between the second protrusion and the nut portion, and abuts against the L-shaped connector.

[0007] Preferably, a spacer ring is provided on the inner wall of the L-shaped joint to form a first groove and a second groove.

[0008] Preferably, the quick-plug assembly includes a release ring, a positioning block, a spring sheet, a gasket, and a second sealing ring. The gasket, spring sheet, and release ring are sequentially arranged in the L-shaped joint. The positioning block is arranged between the gasket, the spring sheet, the release ring and the inner wall of the L-shaped joint. The second sealing ring is arranged in the first groove and the second groove.

[0009] Preferably, the positioning block is provided with a limiting portion, and the spring sheet acts on the release ring to make the release ring abut against the limiting portion.

[0010] Preferably, the nut portion is provided with a third groove contracting inwardly, and the inner wall of the straight-through connector is provided with a thread groove.

[0011] Preferably, an inwardly contracted elastic arm is provided on the outer wall of the L-shaped joint and is inserted into the third groove and acts on the nut portion.

[0012] Preferably, the first protrusion is flush with the end surface of the straight joint, and the second protrusion maintains a gap for gas flow with the inner wall of the L-shaped joint.

[0013] Beneficial effects:

[0014] Compared with the prior art, the beneficial effects of the utility model are:

[0015] (1) In the utility model, a labyrinth seal is formed between the L-shaped joint and the straight joint by the cooperation of the first protrusion, the second protrusion and the third protrusion. When the compressed gas flows from the gap between the first protrusion and the second protrusion into the chamber between the first protrusion and the second protrusion, and then flows into the chamber between the second protrusion and the nut, a chamber with flow resistance is formed through the chamber, so that the gas leakage in the chamber is stabilized, and it is further sealed by the first sealing ring, so as to achieve the purpose of sealing, and the product has the advantage of good sealing.

[0016] (2) The utility model, by providing a plurality of first sealing rings, not only improves the sealing performance, but also prevents the problem of increased air leakage at the connection between the straight joint and the L-shaped joint due to aging of one of the first sealing rings, thereby overcoming the problems raised by the background technology and making the product have the advantage of a long service life. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] Figure 1 This is a schematic cross-sectional structure diagram of an L-shaped pneumatic quick-connect connector of the utility model;

[0018] Figure 2 For this utility model Figure 1 A partial structure enlarged view of detail A of an L-type pneumatic quick-connect connector;

[0019] The corresponding relationship between the illustrations and component names in the figure is as follows:

[0020] Figure numerals: 1. straight-through connector; 2. L-shaped connector; 3. quick-insert assembly; 4. first sealing ring; 11. nut portion; 12. first protrusion; 13. second protrusion; 111. third groove; 112. threaded groove; 21. third protrusion; 22. elastic arm; 23. spacer ring; 24. first groove; 25. second groove; 31. release ring; 32. positioning block; 33. spring sheet; 34. gasket; 35. second sealing ring; 321. limiting portion. DETAILED DESCRIPTION

[0021] The technical solution of the utility model will be clearly and completely described below in conjunction with the embodiments. Obviously, the described embodiments are part of the embodiments of the utility model, not all of the embodiments. Based on the embodiments of the utility model, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the utility model.

[0022] In the description of the present invention, it is necessary to understand that the directions or positional relationships indicated by the terms "up", "down", "left" and "right" are based on the directions or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific direction, be constructed and operated in a specific direction, and therefore cannot be understood as a limitation on the present invention.

[0023] In the embodiment of the present invention, "and / or" is only a description of the association relationship of the associated objects, indicating that there can be three relationships. For example, A and / or B can represent: A exists alone, A and B exist at the same time, and B exists alone. In addition, the character " / " in this article generally indicates that the associated objects before and after are in an "or" relationship.

[0024] Reference example Figure 1 , 2 , an L-shaped pneumatic quick-insert connector, comprising a straight connector 1, an L-shaped connector 2, and a quick-insert assembly 3 arranged on the L-shaped connector 2, the straight connector 1 is provided with a nut portion 11, the outer wall of the straight connector 1 is also provided with a first protrusion 12, a second protrusion 13, and is located above the nut portion 11, the L-shaped connector 2 is threadedly connected to the straight connector 1, the L-shaped connector 2 is provided with a third protrusion, and abuts against the first protrusion 12, a first sealing ring 4 is provided between the first protrusion 12 and the second protrusion 13, and between the second protrusion 13 and the nut portion 11, and abuts against the L-shaped connector 2, and the first protrusion 12, the second protrusion 13 and the third protrusion 21 cooperate with each other to make the L-shaped connector A labyrinth seal is formed between the head 2 and the straight joint 1. When the compressed gas flows from the gap between the first protrusion 12 and the second protrusion 13 into the chamber between the first protrusion 12 and the second protrusion 13, and then flows into the chamber between the second protrusion 13 and the nut 11, a chamber with flow resistance is formed through the chamber, so that the leakage in the chamber is stabilized, and it is further sealed by the first sealing ring 4, so as to achieve the purpose of sealing; by providing multiple first sealing rings 4, not only the sealing performance is improved, but also the problem of increased leakage at the connection between the straight joint 1 and the L-shaped joint 2 due to aging of one of the first sealing rings 4 is prevented;

[0025] It is worth mentioning that the inner wall of the L-shaped joint 2 is provided with a spacer ring 23, and forms a first groove 24 and a second groove 25, through which the pressure of the compressed gas flowing outward is gradually weakened, thereby improving the sealing performance of the connection between the L-shaped joint 2 and the hose;

[0026] It is worth mentioning that the quick-insert assembly 3 includes a release ring 31, a positioning block 32, a spring piece 33, a gasket 34, and a second sealing ring 35. The gasket 34, the spring piece 33, and the release ring 31 are sequentially arranged in the L-shaped joint 2. The positioning block 32 is arranged between the gasket 34, the spring piece 33, the release ring 31 and the inner wall of the L-shaped joint 2. The second sealing ring 35 is arranged in the first groove 24 and the second groove 25. The diameter of the gasket 34 is smaller than the diameter of the spacer ring 23, so that after the hose enters the L-shaped joint 2, the diameter of the gasket 34 is stretched, and then the gasket 34 will shrink inward and fit tightly to the hose to reduce the gap between the two. The spring piece 33 is inclined against the outer wall of the hose to prevent the hose from being disconnected from the L-shaped joint 2. At the same time, the release ring 31 provides a support point for the spring piece 33 to prevent the spring piece 33 from being damaged by the force of the hose pulling outward. The second sealing ring 35 further improves the sealing performance between the hose and the L-shaped joint 2.

[0027] It is worth mentioning that the positioning block 32 is provided with a limiting portion 321, and the spring piece 33 acts on the release ring 31, so that the release ring 31 abuts against the limiting portion 321, and the limiting portion 321 limits the distance that the release ring 31 extends outward;

[0028] It is worth mentioning that the nut portion 11 is provided with a third groove 111 contracting inwardly, and the inner wall of the straight connector 1 is provided with a thread groove 112, which facilitates the connection between the straight connector 1 and the air outlet end of the air compressor;

[0029] It is worth mentioning that the outer wall of the L-shaped connector 2 is provided with an inwardly contracted elastic arm 22, which is inserted into the third groove 111 and acts on the nut portion 11. The elastic arm 22 releases the force to the third groove 111, thereby increasing the friction force at the threaded connection between the straight connector 1 and the L-shaped connector 2, thereby making the connection between the straight connector 1 and the L-shaped connector 2 stable.

[0030] It is worth mentioning that the first protrusion 12 is flush with the end face of the straight joint 1, and the second protrusion 13 and the inner wall of the L-shaped joint 2 maintain a gap for gas circulation. The gap set here is to facilitate the gas to pass through it into the cavity of the second protrusion 13 and the nut part 11, thereby reducing the pressure drop of the compressed gas in the cavity of the first protrusion 12 and the second protrusion 13.

[0031] The above design scheme can enable the product to achieve the advantages of good sealing and long service life.

[0032] The above content is a further detailed description of the utility model in combination with specific implementation methods. It cannot be determined that the specific implementation of the utility model is limited to these descriptions. For ordinary technicians in the technical field to which the utility model belongs, without departing from the concept of the utility model, they can also make several simple deductions or substitutions, which should be regarded as belonging to the scope of protection determined by the claims submitted for the utility model.

Claims

1. An L-shaped pneumatic quick-connect connector, comprising a straight connector (1), an L-shaped connector (2), and a quick-connect assembly (3) arranged on the L-shaped connector (2), characterized in that: The straight joint (1) is provided with a nut portion (11); the outer wall of the straight joint (1) is also provided with a first protrusion (12) and a second protrusion (13) which are located above the nut portion (11); the L-shaped joint (2) is threadedly connected to the straight joint (1); the L-shaped joint (2) is provided with a third protrusion which abuts against the first protrusion (12); a first sealing ring (4) is provided between the first protrusion (12) and the second protrusion (13), and between the second protrusion (13) and the nut portion (11), and abuts against the L-shaped joint (2).

2. The L-shaped pneumatic quick-connect connector according to claim 1, characterized in that: The inner wall of the L-shaped joint (2) is provided with a spacer ring (23) and forms a first groove (24) and a second groove (25).

3. The L-shaped pneumatic quick-connect connector according to claim 2, characterized in that: The quick-connect assembly (3) comprises a release ring (31), a positioning block (32), a spring sheet (33), a gasket (34), and a second sealing ring (35); the gasket (34), the spring sheet (33), and the release ring (31) are sequentially arranged in the L-shaped joint (2); the positioning block (32) is arranged between the gasket (34), the spring sheet (33), the release ring (31), and the inner wall of the L-shaped joint (2); and the second sealing ring (35) is arranged in the first groove (24) and the second groove (25).

4. The L-shaped pneumatic quick-connect connector according to claim 3, characterized in that: The positioning block (32) is provided with a limiting portion (321), and the spring sheet (33) acts on the release ring (31) so that the release ring (31) abuts against the limiting portion (321).

5. The L-shaped pneumatic quick-connect connector according to claim 4, characterized in that: The nut portion (11) is provided with a third groove (111) contracting inwardly, and the inner wall of the straight-through connector (1) is provided with a thread groove (112).

6. The L-shaped pneumatic quick-connect connector according to claim 5, characterized in that: The outer wall of the L-shaped joint (2) is provided with an inwardly contracted elastic arm (22), which is inserted into the third groove (111) and acts on the nut portion (11).

7. The L-shaped pneumatic quick-connect connector according to claim 6, characterized in that: The first protrusion (12) is flush with the end surface of the straight joint (1), and the second protrusion (13) and the inner wall of the L-shaped joint (2) maintain a gap for gas circulation.

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