A quick connector for convex round tube profiled tube

Abstract

The utility model discloses a kind of convex round pipe special-shaped tube quick connectors, belong to pipeline connection technical field.The connector includes shell, dog, sealing washer and sealing spring, shell inner side wall is equipped with the cooperation structure compatible with dog, multiple dogs are evenly distributed along shell circumference and form annular clamping structure, sealing washer adopts elastic material and inner hole is compatible with special-shaped tube outer wall, sealing spring provides sustained pre-tightening force for sealing washer.Working, special-shaped tube is inserted and extruded sealing washer to make sealing spring compression realize preliminary sealing, continue to insert after shell pushes dog and holds special-shaped tube tightly, finally form stable sealing connection.The utility model solves the problems of low connection efficiency, poor sealing, poor universality and insufficient stability of existing special-shaped tube, with the advantages of high connection efficiency, excellent sealing performance, strong universality, simple structure, etc., applicable to the scene such as detection field which has the demand of special-shaped tube quick sealing connection.

Description

Technical Field

[0001] This utility model belongs to the field of pipe connection technology, and in particular relates to a quick connector for convex round pipes and irregular pipes. Background Technology Background Technology

[0003] In industrial production, testing, and other fields, it is frequently necessary to connect various pipes. Connecting irregularly shaped pipes (especially convex cylindrical pipes with raised structures) has always been a technical challenge in the industry. Currently available irregularly shaped pipe connection technologies have several drawbacks:

[0004] 1. Low connection efficiency: Traditional connection methods often require multiple tools and cumbersome procedures to complete the connection, resulting in long processing times and failing to meet the demand for rapid connections. This is particularly problematic in time-sensitive scenarios such as testing, severely impacting work progress. 2. Poor sealing performance: Due to the protruding structure of irregularly shaped tubes, existing connectors struggle to achieve a tight fit with the outer wall of the pipe, easily leading to leakage. This can cause inaccurate test results, especially when transporting gases, liquids, or other media, and even pose safety hazards when testing specific media. 3. Poor versatility: Most existing connectors are designed only for irregularly shaped tubes of specific specifications and structures. When dealing with convex tubes of different protrusion sizes and diameters, different connectors are required, increasing usage costs and operational complexity. 4. Insufficient connection stability: Some connection methods are prone to loosening under vibration or external impact, leading to connection failure and affecting the normal operation of the equipment.

[0005] Therefore, there is a need for a connector that can achieve rapid sealing connection of convex round tubes and irregular tubes, and has good versatility and stability. Utility Model Content

[0006] The purpose of this invention is to provide a quick connector for convex round tubes and other irregularly shaped tubes to solve the problems mentioned in the background art. It achieves a quick, sealed, and stable connection for irregularly shaped tubes with protrusions, meeting the needs of the testing field and other related fields for connecting irregularly shaped tubes.

[0007] To solve the above problems, this utility model provides the following technical solution:

[0008] A quick connector for a convex circular tube includes a housing, claws, a sealing gasket, and a sealing spring. The housing is a hollow cylindrical structure with a mating structure on its inner wall that mates with the claws. Multiple claws are evenly distributed along the circumference of the housing, forming a ring-shaped clamping structure. The inner wall of the claws mates with the outer wall of the tube, and the outer wall of the claws mates with the mating structure on the inner wall of the housing. The sealing gasket is made of an elastic material and is located on the side of the claw near the inlet end of the tube. The inner hole of the sealing gasket mates with the outer wall of the tube. The sealing spring provides a continuous preload to the sealing gasket; one end abuts against the sealing gasket, and the other end abuts against the housing or other fixed components.

[0009] Preferably, the inner wall of the outer shell has a stepped structure, and the outer wall of the claw has a shape that matches the stepped structure.

[0010] Preferably, the inner wall of the claw is provided with an arc-shaped groove that matches the protruding part of the irregular tube, so as to achieve tight clamping of the protruding part of the irregular tube.

[0011] Preferably, the inner edge of the sealing gasket is provided with an annular protrusion or an annular sealing lip.

[0012] Preferably, the sealing spring is sleeved on the outside of the shaped tube, or disposed between the outer shell and the sealing gasket.

[0013] Preferably, the outer shell is made of metal, the claws are made of elastic metal, and the sealing gasket is made of rubber or silicone.

[0014] Preferably, one end of the outer shell is the inlet end of the shaped tube, and the inner diameter of the inlet end is larger than the inner diameter of other locations inside the outer shell, so that the shaped tube can be inserted.

[0015] Preferably, the claw is in an open state in the initial state. When the outer shell moves relative to the claw, the mating structure of the inner wall of the outer shell pushes the claw to retract inward and hold the shaped tube tightly.

[0016] Preferably, the sealing spring is compressed during the insertion of the shaped tube into the connector, generating elastic force to provide continuous sealing pressure for the sealing gasket.

[0017] Preferably, the connector is suitable for convex round tubes or irregular tubes with raised structures.

[0018] The beneficial effects of this utility model are: high connection efficiency: this connector can quickly connect irregular tubes through a simple insertion operation, without the need for complex tools and cumbersome procedures, which greatly shortens the connection time and meets the needs of rapid connection. It is especially suitable for scenarios with high requirements for operational efficiency, such as the testing field.

[0019] Excellent sealing performance: Through the elastic deformation of the sealing gasket and the continuous pre-tightening force provided by the sealing spring, the gap between the shaped tube (including the protruding part) and the connector can be effectively filled to achieve a reliable seal, avoid media leakage, and ensure the accuracy of test results and the safety of equipment operation.

[0020] High versatility: The claws and sealing gaskets can be adapted to different specifications and protrusion sizes of convex round tubes and irregular tubes. Furthermore, through the retractable structure of the claws and the elastic deformation capability of the sealing gaskets, it can adapt to different sizes of irregular tubes within a certain range, reducing the types of connectors and lowering the cost of use.

[0021] Good connection stability: The clamping action of the outer shell on the jaws and the tight grip of the jaws on the shaped tubes can effectively resist the influence of vibration, external impact and other factors, prevent the connection from loosening, ensure the stability and reliability of the connection, and extend the service life of the equipment.

[0022] Simple structure, easy to manufacture and maintain: This connector has few parts and a simple structural design, which is convenient for mass production. At the same time, if the parts are damaged during use, they can be easily replaced and the maintenance cost is low. Attached Figure Description

[0023] Figure 1 This is a schematic diagram of the overall structure of this utility model;

[0024] Figure 2 This is a schematic diagram of the internal structure of this utility model;

[0025] Figure 3 This is a cross-sectional view of the connector of this utility model connected to a non-standard pipe. Detailed Implementation

[0026] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. All other embodiments obtained by those skilled in the art based on the embodiments of the present utility model without creative effort are within the scope of protection of the present utility model.

[0027] like Figure 1-3As shown, a quick connector for a convex circular tube includes a housing, claws, a sealing gasket, and a sealing spring. The housing is a hollow cylindrical structure with a mating structure on its inner wall that matches the claws. Multiple claws are evenly distributed along the circumference of the housing, forming a ring-shaped clamping structure. The inner wall of the claws matches the outer wall of the tube, and the outer wall of the claws mates with the mating structure on the inner wall of the housing. The sealing gasket is made of an elastic material and is located on the side of the claw near the inlet end of the tube. The inner hole of the sealing gasket matches the outer wall of the tube. The sealing spring provides a continuous preload to the sealing gasket; one end abuts against the sealing gasket, and the other end abuts against the housing or other fixed components.

[0028] The inner wall of the outer casing has a stepped structure, and the outer wall of the jaws has a shape that matches the stepped structure. The outer casing is a hollow cylindrical structure, and its inner wall is provided with inclined surfaces or stepped structures that match the jaws. These are used to push the jaws to move and to clamp and limit their position during assembly. One end of the outer casing is the inlet end of the shaped tube, and the other end can be equipped with a connection interface or a closed structure according to actual needs to adapt to different application scenarios.

[0029] The inner wall of the jaws is provided with an arc-shaped groove that matches the protruding part of the shaped tube, so as to achieve tight clamping of the protruding part of the shaped tube. The inner edge of the sealing gasket is provided with an annular protrusion or an annular sealing lip. There are multiple jaws, which are evenly distributed along the circumference of the shell to form an annular clamping structure. The inner wall of the jaws matches the outer wall of the shaped tube (including the protruding part) to achieve tight clamping of the shaped tube; the outer wall of the jaws matches the inclined surface or stepped structure of the inner wall of the shell. When the shell moves relative to the jaws, the shell can push the jaws to retract inward, thereby clamping the shaped tube. The sealing gasket is made of elastic material (such as rubber, silicone, etc.) and is located on the side of the jaws near the inlet end of the shaped tube, and the inner hole of the sealing gasket matches the outer wall of the shaped tube. When the shaped tube is inserted into the connector, the shaped tube will squeeze the sealing gasket, causing the sealing gasket to elastically deform, thereby filling the gap between the shaped tube and the connector and achieving a sealing effect.

[0030] The sealing spring is sleeved on the outside of the shaped tube, or positioned between the housing and the sealing gasket. One end of the sealing spring abuts against the sealing gasket, and the other end abuts against the housing or other fixed components. The sealing spring provides a continuous preload to the sealing gasket, ensuring the sealing pressure between the gasket and the shaped tube. It also acts as a buffer and reset mechanism during the insertion or removal of the shaped tube. The sealing spring is compressed during the insertion of the shaped tube into the connector, generating elastic force to provide continuous sealing pressure to the sealing gasket.

[0031] The outer shell is made of metal, the claws are made of elastic metal, and the sealing gasket is made of rubber or silicone. One end of the outer shell is the inlet end for the shaped tube, and the inner diameter of the inlet end is larger than the inner diameter of other parts of the outer shell to facilitate the insertion of the shaped tube.

[0032] The claws are initially in an open state. When the outer shell moves relative to the claws, the mating structure on the inner wall of the outer shell pushes the claws to retract inward and grip the shaped tube.

[0033] As one feasible approach, the outer casing is made of stainless steel with an inner diameter of 50mm and a length of 100mm. The inner wall of the casing has an inclined surface (inclination angle of 15°), and the inner diameter of the inlet end 12 is enlarged to 60mm to facilitate the insertion of the shaped tube. Six claws are provided, made of spring steel. The inner wall of each claw is machined with an arc-shaped groove that matches the protrusion 51 of the shaped tube. The outer wall of the claw is an inclined surface that matches the inclined surface 11 of the inner wall of the casing (also with an inclination angle of 15°). The claws are 30mm long and 5mm thick. The sealing gasket is made of nitrile rubber with a thickness of 10mm. Its inner diameter matches the outer diameter of the shaped tube (assumed to be 40mm), and an annular protrusion is provided at the edge of the inner hole to enhance the sealing effect. The sealing spring is a cylindrical helical spring with a spring wire diameter of 2mm, an outer diameter of 45mm, and a free length of 40mm. The stiffness coefficient is set according to the actual sealing requirements. Assembly method: Place the sealing gasket 3 inside the housing 1 near the inlet end 12, and sleeve the sealing spring 4 inside the housing, with one end abutting against the end face of the sealing gasket 3 and the other end abutting against the stepped surface inside the housing 1; then evenly install the 6 claws 2 along the circumference of the housing 1 on the side of the sealing gasket 3 away from the inlet end, so that the outer side wall of the claws 2 fits against the inclined surface 11 of the inner side wall of the housing 1.

[0034] The working process of this convex round tube quick connector is as follows: 1. Initial state: The sealing spring is in a naturally extended or slightly compressed state, and the jaws are in an open state to allow the insertion of the convex tube. 2. Insertion process: The convex tube with protrusions is inserted into the connector from the inlet end of the housing. The convex tube first contacts the sealing gasket and pushes the sealing gasket to move inward into the connector. At this time, the sealing spring is compressed, generating elastic force, which makes the sealing gasket tightly fit against the outer wall of the convex tube, initially achieving a seal. 3. Clamping and fixing process: As the convex tube continues to be inserted (after compressing the sealing gasket to a certain distance), the convex tube pushes the jaws or the housing to move relative to each other in the axial direction. The inclined surface or stepped structure of the inner wall of the housing interacts with the outer wall of the jaws, pushing multiple jaws to retract inward, gradually clamping the outer wall of the convex tube (including the protrusions). 4. Stable Connection: Once the shaped tube is inserted, the inner wall of the outer shell fully grips the claws, which tightly hold the tube. Simultaneously, the compression of the sealing spring remains stable, providing continuous sealing force to the sealing gasket. At this point, the connector and the shaped tube form a stable, sealed connection, allowing for subsequent media transport or testing operations. 5. Disassembly: When disassembly is required, the outer shell is moved in the reverse direction (or the outer shell is released from the gripping state via a specific unlocking structure). The claws open under their own elasticity (if the claws are made of elastic material) or the action of an external reset mechanism (if present). The sealing spring pushes the sealing gasket back to its original position, allowing the shaped tube to be pulled out of the connector.

[0035] The above description is merely a preferred embodiment of the present invention and is not intended to limit the present invention. For those skilled in the art, the present invention can have various modifications and variations; any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the present invention should be included within the protection scope of the present invention.

Claims

1. A quick connector for convex circular tubes and irregularly shaped tubes, characterized in that, The device includes a housing (1), claws (2), a sealing gasket (3), and a sealing spring (4). The housing (1) is a hollow cylindrical structure with a mating structure on its inner sidewall that is compatible with the claws (2). Multiple claws (2) are provided, and the multiple claws (2) are evenly distributed along the circumference of the housing (1) to form a ring clamping structure. The inner sidewall of the claws (2) is compatible with the outer wall of the shaped tube (5), and the outer sidewall of the claws (2) is compatible with the mating structure of the inner sidewall of the housing (1). The sealing gasket (3) is made of elastic material and is located on the side of the claws (2) near the inlet end of the shaped tube (5). The inner hole of the sealing gasket (3) is compatible with the outer wall of the shaped tube (5). The sealing spring (4) is used to provide a continuous preload force for the sealing gasket (3). One end of the spring abuts against the sealing gasket (3), and the other end abuts against the housing (1) or other fixed parts.

2. The quick connector for a convex round tube or irregularly shaped tube according to claim 1, characterized in that, The inner wall of the outer shell (1) has a stepped structure (11), and the outer wall of the claw (2) has a shape that matches the stepped structure (11).

3. The quick connector for a convex round tube or irregularly shaped tube according to claim 1, characterized in that, The inner wall of the claw (2) is provided with an arc-shaped groove that matches the protruding part (51) of the shaped tube (5) so as to achieve tight clamping of the protruding part (51) of the shaped tube (5).

4. The quick connector for a convex round tube or irregularly shaped tube according to claim 1, characterized in that, The inner edge of the sealing gasket (3) is provided with an annular protrusion or an annular sealing lip.

5. A quick connector for a convex round tube or irregularly shaped tube according to claim 1, characterized in that, The sealing spring (4) is sleeved on the outside of the shaped tube (5) or placed between the outer shell (1) and the sealing gasket (3).

6. A quick connector for a convex circular tube or irregularly shaped tube according to claim 1, characterized in that, The outer shell (1) is made of metal, the claw (2) is made of elastic metal, and the sealing gasket (3) is made of rubber or silicone.

7. A quick connector for a convex round tube or irregularly shaped tube according to claim 1, characterized in that, One end of the outer shell (1) is the inlet end (12) of the shaped tube (5). The inner diameter of the inlet end (12) is larger than the inner diameter of other positions inside the outer shell (1) so that the shaped tube (5) can be inserted.

8. A quick connector for a convex round tube or irregularly shaped tube according to claim 1, characterized in that, The claw (2) is initially in an open state. When the outer shell (1) moves relative to the claw (2), the mating structure of the inner wall of the outer shell (1) pushes the claw (2) to retract inward and hold the shaped tube (5).

9. A quick connector for a convex round tube or irregularly shaped tube according to claim 1, characterized in that, The sealing spring (4) is compressed during the insertion of the shaped tube (5) into the connector, generating elastic force to provide continuous sealing pressure for the sealing gasket (3).

10. A quick connector for convex round tubes and irregularly shaped tubes according to any one of claims 1-9, characterized in that, The quick connector for convex round tubes and irregular tubes is suitable for convex round tubes and irregular tubes with convex structures (5).

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