Quick coupling with improved resistance to deformation

Abstract

The utility model discloses a quick coupling of improving anti-deformation performance still includes the metal cap of the sleeve connection in the both ends outer of joint body for protecting the end and the outer wall of joint body and installs the metal pressure tablet between the joint body and the claw protection joint body end and the inner wall, the utility model discloses the sleeve of metal cap and the guide sleeve of metal pressure tablet form double metal layer and hold joint body end, and the anti-deformation ability of joint body end has been improved significantly, the sleeve of metal cap effectively disperses the pressure to joint body when the claw is pressed in, avoids the both ends of joint body and breaks down and deforms because of stress concentration, and moreover under high temperature environment, metal cap can assist joint body heat dissipation with its good thermal stability and thermal conductivity, reduces the deformation of high temperature, and the anti-deformation ability of quick coupling under normal and high temperature working condition has been improved greatly, and the service life has been prolonged.

Description

Technical Field

[0001] This utility model relates to the field of joint technology, specifically to a quick connector with improved resistance to deformation. Background Technology

[0002] Quick couplings are widely used in various fluid and gas transmission systems due to their convenient connection characteristics. Traditional quick couplings typically consist of a plastic coupling body, clamps, and a sealing ring. The clamps quickly fix the pipe to the coupling body, achieving rapid connection between pipelines. However, in actual use, when the clamps are pressed into the coupling body, the two ends of the coupling body experience significant radial stress concentration, which can easily lead to cracks or plastic deformation, especially under high-temperature conditions when the material's yield strength decreases, severely affecting the coupling's service life and connection reliability. Moreover, frequent contact and friction between the clamps and the inner wall of the coupling body can cause wear on the inner wall, leading to seal failure and media leakage. Simultaneously, when the temperature of the transported medium is >80℃, the coefficient of thermal expansion of the plastic body is significantly higher than that of metal components, resulting in abnormal clamp clearance and affecting clamp installation. Therefore, developing a quick coupling that can effectively improve deformation resistance and ensure connection stability is urgently needed. To this end, a quick coupling with improved deformation resistance is proposed. Utility Model Content

[0003] The purpose of this invention is to provide a quick connector with improved resistance to deformation in order to solve the above problems.

[0004] To achieve the above objectives, the following technical solution is provided: a quick connector with improved resistance to deformation, comprising a connector body, claws installed at both ends of the connector body and inserted into the connector body, and a plurality of sealing rings installed at both ends of the connector body, characterized in that: it further comprises metal caps sleeved on both ends of the connector body to protect the ends and outer walls of the connector body, and metal pressure plates installed between the connector body and the claws to protect the ends and inner walls of the connector body; the metal caps include a sleeve coaxially sleeved on the connector body and an interlocking device integrally formed with the sleeve to achieve a fixed connection between the metal caps and the connector body; the metal pressure plates include a pressure ring abutting against the ends of the connector body and a guide sleeve extending from the pressure ring into the connector body to isolate the claws from direct contact with the inner wall of the connector body.

[0005] Preferably, the connector body has a first limiting platform and a second limiting platform arranged in sequence on the outer circumference of both ends, forming an annular groove between them.

[0006] Preferably, the interlocking device includes a plurality of slots distributed along the circumference of the sleeve, and an elastic locking piece disposed in the slot, one end of which is connected to the sleeve and the other end extends inward and engages with the limiting platform.

[0007] Preferably, the sleeve end edge is provided with a radially inwardly extending overlapping piece.

[0008] Preferably, the sleeve end edge is provided with a radially inwardly extending overlapping piece, and the inner edge of the overlapping piece is provided with a guide slope inclined towards the inside of the joint.

[0009] Preferably, the inner circumference of the jaws is provided with a plurality of blades for engaging the inserted pipe.

[0010] Preferably, the connector body has a positioning boss at the end for limiting the axial position of the sealing ring and a positioning boss at the middle section for limiting the insertion depth into the pipe.

[0011] The beneficial effects of this utility model are as follows: The metal cap's sleeve and the metal pressure plate's guide sleeve form a double-metal layer clamping mechanism at the end of the connector body, significantly improving the deformation resistance of the connector body end. The metal cap's sleeve effectively disperses the pressure on the connector body when the jaws are pressed in, preventing damage and deformation at both ends of the connector body due to concentrated force. Furthermore, in high-temperature environments, the metal cap, with its excellent thermal stability and conductivity, assists in heat dissipation from the connector body, reducing deformation caused by high temperatures and significantly improving the quick connector's deformation resistance under both normal and high-temperature conditions, thus extending its service life. Its interlocking device ensures a secure connection between the metal cap and the connector body, preventing damage under complex conditions such as vibration and impact. The loosening of the joint enhances its reliability. The metal pressure plate's pressure ring tightly abuts against the end of the joint body, effectively limiting the axial displacement of the metal cap, ensuring connection stability, and improving the compressive strength of the joint body end. The guide sleeve of the metal pressure plate isolates the claws from the inner wall of the joint body, preventing direct wear of the claws on the inner wall during installation and use, protecting the internal structure of the joint body. Even when the components expand and deform slightly due to high temperatures, the guide sleeve ensures that the relative movement between the claws and the inner wall of the joint body remains unaffected, ensuring long-term stability of the joint's performance. At the same time, the guide sleeve can also guide the claws to precise positioning, improving assembly efficiency and quality, and increasing the joint's applicability.

[0012] The limiting platform 1, limiting platform 2, and annular groove set on the outer circumference of both ends of the connector body provide a precise positioning reference for the installation of the metal cap, preventing the metal cap from shifting on the connector body and ensuring the accuracy and consistency of the installation. At the same time, the annular groove can help fix the metal cap and enhance its axial stability. Through the interlocking device, the circumferentially distributed slots cooperate with the elastic locking plate. When the metal cap is installed, one end of the elastic locking plate is connected to the sleeve, and the other end is locked into the limiting platform 1, forming a mechanical locking structure. Compared with the traditional connection method, this design significantly improves the connection strength between the metal cap and the connector body, effectively preventing the metal cap from falling off under harsh working conditions such as high pressure and vibration, and further ensuring the overall reliability and safety of the connector.

[0013] By designing the blades, when the pipe is inserted into the clamp, the blades cut into the outer wall of the pipe, causing a certain deformation. This deformation fills the tiny gap between the pipe and the clamp, and together with the sealing ring, improves the sealing performance of the joint, effectively preventing media leakage and meeting the requirements for high sealing performance. At the same time, the annular distribution design of the blades ensures that the clamp's fixing force on the pipe is evenly distributed, preventing local stress concentration caused by uneven force on the pipe, protecting the integrity of the pipe structure, and extending the service life of the pipe. Attached Figure Description

[0014] Figure 1 This is a schematic diagram of the overall structure of this utility model;

[0015] Figure 2 This is an exploded view of the present invention;

[0016] Figure 3 This is a cross-sectional view of the present invention;

[0017] Figure 4 This is a schematic diagram of the connector body structure of this utility model;

[0018] Figure 5 This is a schematic diagram of the metal cap structure of this utility model;

[0019] Figure 6 This is a schematic diagram of the metal pressing structure of this utility model.

[0020] Legend: 1. Connector body; 11. Limiting platform one; 12. Limiting platform two; 13. Ring groove; 14. Positioning boss one; 15. Positioning boss two; 2. Claw; 21. Blade; 3. Sealing ring; 4. Metal cap; 41. Sleeve; 411. Overlap piece; 4111. Guide slope; 42. Interlocking device; 421. Groove; 422. Elastic locking piece; 5. Metal pressure plate; 51. Pressure ring; 52. Guide sleeve. Detailed Implementation

[0021] The following description, in conjunction with the accompanying drawings, further illustrates a quick connector with improved resistance to deformation according to this utility model.

[0022] It should be noted that all directional indications in the embodiments of the present invention, such as up, down, left, right, front, back, etc., are only used to explain the relative positional relationship and movement of the components in a specific posture as shown in the attached figure. If the specific posture changes, the directional indication will also change accordingly.

[0023] In this utility model, unless otherwise explicitly specified and limited, the terms "connection," "fixing," etc., should be interpreted broadly. For example, "fixing" can mean a fixed connection, a detachable connection, or an integral part; it can mean a mechanical connection or an electrical connection; it can mean a direct connection or an indirect connection through an intermediate medium; it can mean the internal communication of two components or the interaction between two components, unless otherwise explicitly limited. Those skilled in the art can understand the specific meaning of the above terms in this utility model according to the specific circumstances.

[0024] Participation Figure 1-6 As shown, this embodiment of a quick connector with improved deformation resistance includes a connector body 1, claws 2 installed at both ends of the connector body 1 and inserted into the connector body 1, and a plurality of sealing rings 3 installed at both ends of the connector body 1. The connector is characterized by further including metal caps 4 sleeved around both ends of the connector body 1 to protect the ends and outer walls of the connector body 1, and metal pressure plates 5 installed between the connector body 1 and the claws 2 to protect the ends and inner walls of the connector body 1. The metal caps 4 include a sleeve 41 coaxially sleeved around the connector body 1, and an interlocking device 42 integrally formed with the sleeve 41 to achieve a fixed connection between the metal caps 4 and the connector body 1. The metal pressure plates 5 include a pressure ring 51 abutting against the ends of the connector body 1, and a guide sleeve 52 extending from the pressure ring 51 into the connector body 1 to isolate the claws 2 from direct contact with the inner wall of the connector body 1. The connector body 1 and the claws 2 are made of high-strength engineering plastics. The sealing ring 3 is made of rubber; the metal cap 4 and metal pressure plate 5 are made of metal by stamping or machining; the two ends of the connector body 1 can connect to pipes of the same or different diameters; the metal cap 4 and metal pressure plate 5 are respectively sleeved on the ends of the connector body 1, and the pressure ring 51 of the metal pressure plate 5 is tightly abutted against the end of the connector body 1; the guide sleeve 52 is inserted into the connector body 1, and the guide sleeve 52 is coaxial with the inner wall of the connector body 1 and has a suitable gap to ensure that the claw 2 can be smoothly inserted and moved in the guide sleeve 52, protecting the inner wall of the connector body 1 from friction by the claw 2; the sleeve 41 of the metal cap 4 is coaxially sleeved on the outside of the end of the connector body 1, so that the sleeve 41 fits against the outer wall of the connector body 1; the interlocking device 42 on the metal cap 4 realizes the fixed connection between the metal cap 4 and the connector body 1, ensuring that the metal cap 4 will not undergo axial or circumferential displacement during use.

[0025] The double-metal layer formed by the sleeve 41 of the metal cap 4 and the guide sleeve 52 of the metal pressure plate 5 clamps the end of the connector body 1, significantly improving the deformation resistance of the end of the connector body 1. When the claw 2 is pressed in, the sleeve 41 of the metal cap 4 effectively disperses the pressure on the connector body 1, preventing damage and deformation at both ends of the connector body 1 due to concentrated force. Furthermore, in high-temperature environments, the metal cap 4, with its good thermal stability and thermal conductivity, can assist in heat dissipation of the connector body 1, reducing deformation caused by high temperatures, and significantly improving the deformation resistance of the quick connector under normal and high-temperature conditions, extending its service life. Its interlocking device 42 ensures a secure connection between the metal cap 4 and the connector body 1, preventing loosening under complex conditions such as vibration and impact, and increasing... The reliability of the connector is enhanced; the pressure ring 51 of the metal pressure plate 5 abuts tightly against the end of the connector body 1, which can effectively limit the axial displacement of the metal cap 4, ensure connection stability and improve the compressive strength of the end of the connector body 1; the guide sleeve 52 of the metal pressure plate 5 isolates the claw 2 from the inner wall of the connector body 1, preventing the claw 2 from directly wearing the inner wall during installation and use, protecting the internal structure of the connector body 1. Even if the components are slightly expanded and deformed due to high temperature, the guide sleeve 52 can ensure that the relative movement between the claw 2 and the inner wall of the connector body 1 is not affected, ensuring the long-term stability of the connector performance. At the same time, the guide sleeve 52 can also guide the claw 2 to be accurately positioned, improve assembly efficiency and quality, and increase the applicability of the connector.

[0026] In one embodiment, the outer circumference of both ends of the connector body 1 is provided with a first limiting platform 11 and a second limiting platform 12 arranged sequentially, forming an annular groove 13 between them; the interlocking device 42 includes a plurality of slots 421 distributed circumferentially along the sleeve 41, and an elastic locking piece 422 disposed in the slots 421, one end of which is connected to the sleeve 41 and the other end extends inward and engages with the first limiting platform 11; the end edge of the sleeve 41 is provided with a radially inwardly extending overlapping piece 411, the lower surface of which forms a pressure-bearing contact surface with the upper surface of the pressure ring 51; the inner edge of the overlapping piece 411 is provided with a guide slope 4111 inclined towards the inside of the connector body 1; before the metal cap 4 is fitted into the connector body 1, the surfaces of both ends of the connector body 1 need to be cleaned to ensure that the first limiting platform 11, the second limiting platform 12 and the annular groove 13 are free of oil and impurities, so as to avoid affecting the installation accuracy and connection effect of subsequent components.

[0027] During installation, as the sleeve 41 of the metal cap 4 is pressed into the end of the connector body 1, the elastic locking piece 422 located in the groove 421 is squeezed by the limiting platform 11, causing elastic deformation and inward contraction. When the overlapping piece 411 at the end of the sleeve 41 contacts the pressure ring 51 of the metal pressure plate 5, the groove 421 on the sleeve 41 aligns with the annular groove 13, and the elastic locking piece 422 springs into the annular groove 13 under its own elastic restoring force, with one end of the elastic locking piece 422 abutting against the limiting platform 11. 11. To achieve the snap-fit ​​fixation between the metal cap 4 and the connector body 1, the metal cap 4 can be slightly shaken to check whether it is firmly fixed. If the metal cap 4 becomes loose or displaced, it needs to be readjusted and installed to ensure that the elastic locking piece 422 is fully engaged with the limiting platform 11 to form a stable mechanical locking structure. Moreover, after the overlapping piece 411 at the end edge of the sleeve 41 is installed in place, its lower surface must be tightly fitted with the upper surface of the pressure ring 51 of the metal pressure piece 5 to form a pressure-bearing contact surface.

[0028] The limiting platforms 11 and 12, along with the annular grooves 13, provided on the outer circumferences of both ends of the connector body 1 provide a precise positioning reference for the installation of the metal cap 4, preventing the metal cap 4 from shifting on the connector body 1 and ensuring the accuracy and consistency of the installation. At the same time, the annular grooves 13 can help fix the metal cap 4 and enhance its axial stability. Through the interlocking device 42, the circumferentially distributed slots 421 cooperate with the elastic locking plate 422. When the metal cap 4 is installed, one end of the elastic locking plate 422 is connected to the sleeve 41, and the other end is locked to the limiting platform 11, forming a mechanical locking structure. Compared with the traditional connection method, this design significantly improves the connection strength between the metal cap 4 and the connector body 1, effectively preventing the metal cap 4 from falling off under harsh working conditions such as high pressure and vibration, and further ensuring the overall reliability and safety of the connector.

[0029] In one embodiment, the inner circumference of the jaw 2 is provided with a plurality of blades 21 for engaging and inserting the pipe. With the blades 21 arranged such that when the pipe is inserted into the jaw 2, the blades 21 cut into the outer wall of the pipe and deform accordingly. This deformation fills the tiny gap between the pipe and the jaw 2, and, in conjunction with the sealing ring 3, improves the sealing performance of the joint, effectively preventing media leakage and meeting the requirements for high sealing performance. Simultaneously, the annular distribution of the blades 21 ensures that the fixing force of the jaw 2 on the pipe is evenly distributed, preventing localized stress concentration due to uneven force distribution, protecting the structural integrity of the pipe, and extending its service life.

[0030] In one embodiment, the connector body 1 has a positioning boss 14 at its end for limiting the axial position of the sealing ring 3 and a positioning boss 15 at its middle section for limiting the insertion depth into the pipe. The positioning boss 14 at the end of the connector body 1 provides precise axial positioning for the sealing ring 3, effectively preventing axial movement of the sealing ring 3 during installation or use. This ensures the sealing ring 3 is always in the optimal sealing position, fully utilizing its sealing function and avoiding sealing failure due to displacement of the sealing ring 3, further improving the sealing performance and reliability of the connector. The second boss 15 is located in the middle section of the connector body 1, which can clearly define the insertion depth of the pipe, ensuring that the pipe is in a uniform and accurate position every time it is installed. This improves the standardization of assembly, reduces problems such as unstable connection and poor sealing caused by inconsistent pipe insertion depth, simplifies the installation process, reduces reliance on the experience of installers, and significantly improves assembly efficiency. At the same time, precise control of pipe insertion depth helps the blade 21 in the claw 2 to bite evenly with the outer wall of the pipe, and the metal pressure plate 5 to fit more tightly with each component, thereby enhancing the overall connection strength and stability of the connector.

[0031] In the process of using this utility model, the sealing ring 3 is first installed into both ends of the connector body 1, and the sealing ring 3 is axially positioned by the positioning boss 14. During the installation process, it is necessary to ensure that the sealing ring 3 enters and fits the positioning boss 14 without twisting or deformation.

[0032] Slowly push the guide sleeve 52 on the metal pressure plate 5 along the inner wall of the connector body 1 until the pressure ring 51 abuts against the end of the connector body 1; during installation, ensure that the guide sleeve 52 is coaxial with the inner wall of the connector body 1 and that the gap between the guide sleeve 52 and the inner wall of the connector body 1 is uniform.

[0033] Next, align the sleeve 41 of the metal cap 4 with the end of the connector body 1, so that the groove 421 on the sleeve 41 is aligned with the limiting platform 11 on the connector body 1, and slowly push the sleeve 41 along the outer circumference of the connector body 1. At this time, the elastic locking piece 422 set in the groove 421 will be squeezed by the limiting platform 11, undergo elastic deformation and shrink inward. When the overlapping piece 411 at the end of the sleeve 41 contacts the pressure ring 51 of the metal pressure plate 5, the groove 421 on the sleeve 41 is aligned with the ring groove 13, and the elastic locking piece 422 springs into the ring groove 13 under the action of its own elastic restoring force, and one end of the elastic locking piece 422 abuts against the limiting platform 11, so as to realize the snap-fit ​​fixation between the metal cap 4 and the connector body 1. At the same time, ensure that the overlapping piece 411 at the end of the sleeve 41 covers the upper surface of the pressure ring 51 of the metal pressure plate 5 to ensure stable installation. After installation, the metal cap 4 can be gently shaken to check whether it is firmly fixed.

[0034] Then, guided by the guide slope 4111 on the overlapping piece 411, the claw 2 is inserted into the connector body 1 along the inner wall of the guide sleeve 52 until the claw 2 presses against the upper surface of the overlapping piece 411 of the metal cap 4. The metal cap 4 and the metal pressure plate 5 work together to protect the end of the connector body 1 during the pressing of the claw 2.

[0035] When connecting the pipe, align the pipe with the jaw 2 and slowly insert the pipe into the jaw 2. During the insertion process, use the positioning boss 2 15 in the middle section of the connector body 1 as a depth reference and continue to push the pipe until the end of the pipe contacts the positioning boss 2 15. At this time, the pipe insertion depth reaches the design requirements. During the insertion process, the blade 21 inside the jaw 2 will gradually cut into the outer wall of the pipe to achieve a firm engagement. When inserting, it is necessary to control the force and speed to avoid damage to the pipe due to excessive speed or force.

[0036] The above embodiments are illustrative of the present invention and are not intended to limit the present invention. Any simple modifications to the present invention are within the protection scope of the present invention.

Claims

1. A quick connector with improved resistance to deformation, comprising a connector body (1), claws (2) installed at both ends of the connector body (1) and inserted into the connector body (1), and a plurality of sealing rings (3) installed at both ends of the connector body (1), characterized in that: It also includes metal caps (4) sleeved on both ends of the connector body (1) to protect the ends and outer walls of the connector body (1) and metal pressure plates (5) installed between the connector body (1) and the claws (2) to protect the ends and inner walls of the connector body (1); the metal caps (4) include a sleeve (41) coaxially sleeved on the outside of the connector body (1) and an interlocking device (42) integrally formed with the sleeve (41) to realize the fixed connection between the metal caps (4) and the connector body (1); the metal pressure plates (5) include a pressure ring (51) abutting against the end of the connector body (1) and a guide sleeve (52) extending from the pressure ring (51) into the connector body (1) to isolate the claws (2) from directly contacting the inner wall of the connector body (1).

2. The quick connector with improved resistance to deformation according to claim 1, characterized in that: The connector body (1) has two limiting platforms (11) and two limiting platforms (12) arranged in sequence on the outer circumference of both ends, forming an annular groove (13) between them.

3. A quick connector with improved resistance to deformation according to claim 2, characterized in that: The interlocking device (42) includes a plurality of slots (421) distributed circumferentially along the sleeve (41), and an elastic locking piece (422) disposed in the slot (421) with one end connected to the sleeve (41) and the other end extending inward and engaging with the limiting platform (11).

4. A quick connector with improved resistance to deformation according to claim 3, characterized in that: The sleeve (41) has a radially inwardly extending overlapping piece (411) at its end edge.

5. A quick connector with improved resistance to deformation according to claim 4, characterized in that: The inner edge of the overlapping piece (411) is equipped with a guide slope (4111) that is inclined towards the inside of the connector body (1).

6. A quick connector with improved resistance to deformation according to claim 1, characterized in that: The jaw (2) has several blades (21) arranged in a ring on its inner circumference for engaging the inserted pipe.

7. A quick connector with improved resistance to deformation according to claim 2, characterized in that: The connector body (1) is provided with a positioning boss (14) at the end for limiting the axial position of the sealing ring (3) and a positioning boss (15) at the middle section for limiting the insertion depth of the pipe.

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