A plastic reusable pipe joint
The design of the inner sleeve and fixed screw-on parts solves the problem of easy aging of the elastic retaining ring, realizes convenient disassembly and assembly of pipe fittings and easy replacement of parts, and improves sealing performance and reusability.
Patent Information
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- ZHUJI XIANGJIA MASCH CO LTD
- Filing Date
- 2025-08-20
- Publication Date
- 2026-06-02
Smart Images
Figure CN224315747U_ABST
Abstract
Description
Technical Field
[0001] This application relates to the field of pipe fitting technology, and in particular to a reusable plastic pipe fitting. Background Technology
[0002] Pipe fittings are connecting components that connect two or more pipes. Their core function is to ensure the sealing, reliability, and flexibility of the fluid transport system. Reusable pipe fittings refer to pipe fittings that can be individually removed from the two pipe sections after installation and reused locally.
[0003] Existing pipe fittings, such as the quick-connect fitting disclosed in CN211976217U, use an elastic retaining ring embedded in a second groove to lock the air tube inserted into the through hole, and can be unlocked by pressing a button in a first countersunk hole, enabling the pipe fitting to be reused. However, with long-term use, the elastic retaining ring ages and loses elasticity, affecting its service life. Furthermore, the elastic retaining ring requires specific tools for disassembly and replacement, making it inconvenient. Once the quick-connect fitting or pipe fitting is assembled, it is difficult to replace components such as the button. As a result, if any internal component is damaged, a new quick-connect fitting must be replaced, affecting the reuse rate.
[0004] The above content is only used to help understand the technical solution of this application and does not represent an admission that the above content is the closest prior art to this application. Summary of the Invention
[0005] Based on this, this application provides a reusable plastic pipe fitting to solve one of the aforementioned technical problems.
[0006] The technical solution adopted by this application to solve its technical problem is as follows: a reusable plastic pipe fitting, including a socket fitting and a plug fitting, wherein the socket fitting has a through hole formed in the middle, and mounting cylinders are formed at both ends of the socket fitting. The inner wall of the mounting cylinder is provided with internal threads, and a fixing screwing component is detachably provided inside the mounting cylinder via the threads; it also includes: an inner sleeve, which is a hollow tubular component, disposed inside the socket fitting, between the two fixing screwing components, its outer wall being tightly fitted to the inner wall of the through hole, and the inner sleeve having a plurality of mounting grooves radially formed thereon, the mounting grooves occupying a circumferential angle of 180°. The inner sleeve, coaxial with the mounting groove, has a radially formed groove on its inner wall; a friction ring includes a mounting ring and a plurality of elastic friction plates arranged in a ring on the inner wall of the mounting ring, the friction ring being secured in the mounting groove and the groove by the mounting ring; an unlocking button is limited between the inner sleeve and the fixing screw, used to unlock the connector, a spring for resetting the unlocking button is provided between the unlocking button and the inner sleeve; the connector is locked in the socket joint by the elastic friction plates, and the connector is unlocked by pressing the fixing screw to push the elastic friction plates.
[0007] In some embodiments, the inner sleeve has positioning protrusions extending from the inner sides of both ends, and the first end of the spring is disposed in the area between the positioning protrusions and the insertion tube.
[0008] In some embodiments, the unlock button includes an unlock sleeve and a sliding ring disposed on the outer wall of the unlock sleeve. The sliding ring limits the unlock button between the fixed screw and the inner sleeve, and the second end of the spring abuts against the sliding ring.
[0009] In some embodiments, sealing rings are provided between the fixing screw and the mounting cylinder, between the sliding ring and the unlocking button, and between the inner sleeve and the socket joint.
[0010] In some embodiments, a limiting ring is formed on the inner wall at the center of the inner sleeve.
[0011] In some embodiments, one end of the unlock button extends out of the socket connector.
[0012] In some embodiments, the fixing screwing member is a hollow annular structure, including a screwed part and a base. The outer wall of the screwed part is provided with an external thread and is screwed to the mounting cylinder. The outer wall of the base is flush with the outer wall of the mounting cylinder. The base forms a limiting step on the inner side of the fixing screwing member. The limiting step is used to limit the unlocking button, spring and inner sleeve in the socket joint.
[0013] In some embodiments, the socket joint, inner sleeve, and unlock button are made of plastic.
[0014] The beneficial effects of this application are as follows: Several sets of mounting grooves and locking slots are opened on the same radial plane of the inner sleeve. The friction ring is locked inside the inner sleeve by mounting rings. The inner sleeve is limited within the socket joint by fixing screws screwed to both ends. A spring and an unlocking button are also provided between the inner sleeve and the fixing screws. The insertion tube is locked by the elastic friction block on the friction ring. Unlocking is achieved by pressing the unlocking button to drive the elastic friction block to disengage from the insertion tube. The pipe joint of this application is easy to assemble and disassemble, reusable, and all components inside the pipe joint can be easily disassembled for maintenance or replacement, effectively extending the service life of the pipe joint and improving the joint reuse rate. Furthermore, the friction ring, as a component prone to aging, is installed inside the inner sleeve through locking slots and mounting grooves, facilitating its assembly and disassembly; multiple sealing rings are provided, resulting in good sealing performance. Attached Figure Description
[0015] To more clearly illustrate the technical solutions in the embodiments of this application, the accompanying drawings used in the description of the embodiments will be briefly introduced below. Obviously, the accompanying drawings described below are only some embodiments of this application. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.
[0016] Figure 1 This is a cross-sectional plan view of this application.
[0017] Figure 2 This is a cross-sectional perspective view of this application.
[0018] Figure 3 This is a three-dimensional schematic diagram of this application.
[0019] Figure 4 This is a schematic diagram of the explosion of the inner sleeve and friction ring of this application.
[0020] Figure 5 This is a schematic diagram of the fixing screw component of this application.
[0021] Figure 6 This is a schematic diagram of the unlock button in this application.
[0022] Explanation of reference numerals: 1. Socket joint; 101. Mounting sleeve; 2. Insertion tube; 3. Through hole; 4. Fixing screw part; 401. Threaded part; 402. Base; 5. Inner sleeve; 501. Positioning protrusion; 502. Limiting ring; 6. Mounting groove; 7. Slot; 8. Friction ring; 801. Mounting ring; 802. Elastic friction plate; 9. Unlocking button; 901. Unlocking sleeve; 902. Sliding ring; 10. Spring; 11. Sealing ring; 12. Limiting step. Detailed Implementation
[0023] The technical solutions of the embodiments of this application will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only a part of the embodiments of this application, and not all of the embodiments. Based on the embodiments of this application, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the scope of protection of this application. In addition, the technical solutions of various embodiments can be combined with each other, but this must be based on the ability of those of ordinary skill in the art to implement them. When the combination of technical solutions is contradictory or cannot be implemented, it should be considered that such combination of technical solutions does not exist and is not within the scope of protection of this application.
[0024] In the embodiments of this application, please refer to Figure 1-6 As shown, this reusable plastic pipe fitting mainly includes a socket joint 1 and a connector 2. The socket joint 1 has a through hole 3 extending vertically. Mounting cylinders 101 are formed at both ends of the socket joint 1. Internal threads are provided on the inner wall of the mounting cylinders 101. A fixing screwing element 4 is detachably installed inside the mounting cylinder 101 via the threads. It also includes an inner sleeve 5, a hollow tubular component, located inside the socket joint 1, between the two fixing screwing elements 4. Its outer wall is tightly fitted to the inner wall of the through hole 3. The inner sleeve 5 has several radially formed mounting grooves 6, each mounting groove 6 occupying a circumferential angle of 180 degrees. The mounting grooves 6 penetrate one side wall of the inner sleeve 5. A retaining groove 7 is radially formed on the inner wall of the inner sleeve 5, coaxial with the mounting grooves 6, with a circumferential range of 180 degrees. A friction ring 8 is also included. The device includes a mounting ring 801 and several elastic friction pads 802 arranged in a ring on the inner wall of the mounting ring 801. The friction ring 8 is secured in the mounting groove 6 and the slot 7 by the mounting ring 801. When the massage ring is installed on the inner sleeve 5, the outer surface of the mounting ring 801 is flush with the outer surface of the inner sleeve 5. To replace it, simply place the inner sleeve 5 on its side and tap it to remove the friction ring 8. An unlocking button 9 is limited between the inner sleeve 5 and the fixing screw 4 and is used to unlock the insertion tube 2. A spring 10 is provided between the unlocking button 9 and the inner sleeve 5 to reset the unlocking button 9. The insertion tube 2 is locked in the socket joint 1 by the elastic friction pads 802. The insertion tube 2 is unlocked by pressing the fixing screw 4 to push the elastic friction pads 802.
[0025] The following will continue to describe some preferred / improved embodiments based on the above embodiments. Any one of the following embodiments can be selected, or multiple embodiments can be combined.
[0026] like Figure 1As shown, the inner sleeve 5 has positioning protrusions 501 extending from the inner sides of both ends. The first end of the spring 10 is located in the area between the positioning protrusions 501 and the insertion tube 2. The spring 10 can be compressed when the unlock button 9 is pressed. After the unlock button 9 is released, the unlock button 9 is reset under the action of the restoring force of the spring 10, which can effectively prevent the unlock button 9 from being stuck by the elastic friction piece 802.
[0027] Furthermore, the unlocking button 9 includes an unlocking sleeve 901 and a sliding ring 902 disposed on the outer wall of the unlocking sleeve 901. The sliding ring 902 limits the unlocking button 9 between the fixing screw 4 and the inner sleeve 5. The second end of the spring 10 abuts against the sliding ring 902. When assembling the pipe joint, the unlocking button 9 is first pre-placed in the fixing screw 4, and then the combination of the screw fixing component and the unlocking button 9 is screwed and fixed in one end of the mounting cylinder 101 of the socket joint 1. Then, the spring 10, the inner sleeve 5, another spring 10 and another unlocking button 9 are sequentially inserted from the other port of the socket joint 1. Finally, another fixing screw 4 is used to screw into the mounting cylinder 101 of that port to complete the sealing.
[0028] Specifically, sealing rings 11 are provided between the fixing screw 4 and the mounting cylinder 101, between the sliding ring 902 and the unlocking button 9, and between the inner sleeve 5 and the socket joint 1, which can further improve the sealing performance of the pipe joint and prevent fluid leakage.
[0029] Furthermore, a limiting ring 502 is formed on the inner wall at the center of the inner sleeve 5. The limiting ring 502 plays a limiting role and can separate the insertion pipes 2 at both ends.
[0030] Furthermore, to facilitate pressing the unlock button 9, one end of the unlock button 9 extends out of the socket connector 1.
[0031] Furthermore, combined with Figure 5 As shown, the fixing screwing component 4 is a hollow annular structure, including a screwed part 401 and a base 402. The screwed part 401 has an external thread on its outer wall and is screwed to the mounting cylinder 101. The outer wall of the base 402 is flush with the outer wall of the mounting cylinder 101. The base 402 forms a limiting step 12 on the inner side of the fixing screwing component 4. The limiting step 12 is used to limit the unlocking button 9, the spring 10 and the inner sleeve 5 within the socket joint 1.
[0032] Specifically, the socket joint 1, the inner sleeve 5, and the unlocking button 9 are made of plastic.
[0033] When it is necessary to replace internal components, such as the friction ring 8, simply unscrew the fixing screw 4 at the lower end to remove the components inside the socket joint 1, including the inner sleeve 5, and then remove the friction ring 8 from the inner sleeve 5 for replacement. This application is easy to disassemble and assemble, convenient to maintain, and highly reusable.
[0034] The various embodiments of this application have now been described in detail. To avoid obscuring the concept of this application, some details known in the art have not been described. Those skilled in the art can fully understand how to implement the technical solutions disclosed herein based on the above description.
[0035] Finally, it should be noted that the above description is only a preferred embodiment of this application. The foregoing embodiments are only used to illustrate the technical solutions of this application and are not intended to limit it. Although this application has been described in detail with reference to the foregoing embodiments, those skilled in the art should understand that modifications can still be made to the technical solutions described in the foregoing embodiments, or equivalent substitutions can be made to some of the technical features. These modifications or substitutions do not cause the essence of the corresponding technical solutions to deviate from the spirit and scope of the technical solutions of the embodiments of this application.
Claims
1. A plastic reusable pipe joint comprising a socket and a spigot, characterised in that, The socket joint has a through hole extending from top to bottom, and mounting cylinders are formed at both ends of the socket joint. The inner wall of the mounting cylinder is provided with internal threads, and a fixing screw is detachably provided in the mounting cylinder through the threads. Also includes: The inner sleeve is a hollow tubular component, which is disposed inside the socket joint and between the two fixing screwing parts. Its outer wall is in close contact with the inner wall of the insertion hole. The inner sleeve has several mounting grooves radially formed. The mounting grooves occupy an angle of 180 degrees in the circumferential direction. The inner wall of the inner sleeve, which is coaxial with the mounting grooves, has a retaining groove radially formed. A friction ring includes a mounting ring and a plurality of elastic friction pads arranged in a ring on the inner wall of the mounting ring. The friction ring is secured in the mounting groove and the slot by the mounting ring. An unlock button is positioned between the inner sleeve and the fixed screwing component to unlock the connector. A spring is provided between the unlock button and the inner sleeve to reset the unlock button. The insertion tube is locked inside the socket joint by the elastic friction plate. The insertion tube can be unlocked by pressing the fixing screw to push the elastic friction plate.
2. The reusable plastic pipe fitting according to claim 1, characterized in that, The inner sleeve has positioning protrusions extending from the inner sides of both ends, and the first end of the spring is located in the area between the positioning protrusions and the insertion tube.
3. A reusable plastic pipe fitting according to claim 2, characterized in that, The unlocking button includes an unlocking sleeve and a sliding ring disposed on the outer wall of the unlocking sleeve. The sliding ring limits the unlocking button between the fixed screw and the inner sleeve, and the second end of the spring abuts against the sliding ring.
4. A reusable plastic pipe fitting according to claim 3, characterized in that, Sealing rings are provided between the fixing screw and the mounting cylinder, between the sliding ring and the unlocking button, and between the inner sleeve and the socket joint.
5. A reusable plastic pipe fitting according to claim 1, characterized in that, A limiting ring is formed on the inner wall at the center of the inner sleeve.
6. A reusable plastic pipe fitting according to claim 1, characterized in that, One end of the unlock button extends from the socket connector.
7. A reusable plastic pipe fitting according to claim 1, characterized in that, The fixing screwing component is a hollow ring structure, including a screwed part and a base. The outer wall of the screwed part is provided with an external thread and is screwed to the mounting cylinder. The outer wall of the base is flush with the outer wall of the mounting cylinder. The base forms a limiting step on the inner side of the fixing screwing component. The limiting step is used to limit the unlocking button, spring and inner sleeve in the socket joint.
8. A reusable plastic pipe fitting according to claim 1, characterized in that, The socket joint, inner sleeve, and unlock button are made of plastic.