Self-locking PVC quick-connect pipe fitting

Abstract

The utility model provides a kind of self-locking type PVC quick connecting pipe fitting, it is related to the technical field of connecting pipe fitting, solve the problem of the dependence of traditional pipe fitting connecting mode on complex tool and professional skill, including the self-locking assembly for connecting first pipeline and second pipeline, the self-locking assembly includes first plug and second plug, the first plug includes locating block, the locating block includes lock plate and spring and first magnet, the second plug includes locating groove and locating column, the locating groove groove bottom inlay has second magnet.When the first plug and the second plug are butted, the magnet generates suction force to guide the locating block to be inserted into the locating groove, the locating column is against the lock plate in the mounting hole and pushes it to slide, the lock plate is compressed under stress spring, the lock groove and the lock plate position correspond, the spring restores and pushes the lock plate to be inserted into the lock groove, instantaneous self-locking, the whole process does not need any complex tool, greatly improves installation efficiency.

Description

Technical Field

[0001] This utility model relates to the technical field of connecting pipe fittings, and more specifically, to a self-locking PVC connecting pipe fitting. Background Technology

[0002] PVC quick-connect pipe fittings, as an extremely convenient connection component in modern pipeline engineering, exhibit numerous superior characteristics. They eliminate the reliance on complex tools and specialized skills required by traditional connection methods, utilizing a carefully designed structure including press-fit, threaded locking, and push-in mechanisms to achieve stable and reliable connections between pipes at an extremely fast speed. In practical applications, these fittings offer extremely high installation efficiency, significantly shortening construction cycles and greatly reducing labor costs, saving valuable time and resources for engineering projects. Simultaneously, their excellent sealing performance is another highlight, effectively preventing leaks and ensuring the long-term stable operation of the pipeline system, avoiding various safety hazards and economic losses caused by leaks. Due to these advantages, PVC quick-connect pipe fittings are widely used in water supply and drainage, gas, HVAC, and other systems, providing efficient and reliable connection solutions for various pipeline projects. However, existing self-locking PVC pipe fittings have certain shortcomings. On March 19, 2024, Chinese utility model patent (CN220623170U) disclosed an easy-to-install PVC pipe fitting. This solution connects two sets of PVC pipes by setting an installation component, and the fittings also require threaded connections. During operation, a wrench or pipe wrench must be used to rotate the threaded joint, which undoubtedly increases the complexity and inconvenience of the operation. In view of this, there is an urgent need to make targeted improvements and optimizations to self-locking PVC quick-connect fittings to overcome the above problems, further improve their convenience and practicality, and better meet the ever-evolving needs of the pipeline engineering field. Summary of the Invention

[0003] To address the issue of reliance on complex tools and specialized skills in traditional pipe connection methods, this invention proposes a self-locking pipe fitting that is easy to operate.

[0004] To achieve the above-mentioned technical effects, the technical solution of this utility model is as follows: A self-locking PVC quick-connect fitting includes: a self-locking assembly comprising: a first plug, one end of which is provided with a positioning block, the positioning block having an installation hole, a locking plate and a spring being provided within the installation hole, one end of the spring being connected to the inner wall of the installation hole, and the other end of the spring being connected to the locking plate, the spring being arranged radially along the installation hole; and a second plug, one end of which is provided with a positioning post, the positioning post being inserted into the installation hole, the positioning post having a locking groove, and the locking plate being inserted into the locking groove when the positioning post is inserted into the installation hole.

[0005] Preferably, the end face of the second plug is provided with a slot for the first plug to be inserted.

[0006] Preferably, the bottom of the slot is provided with a water-sealing groove, and the end face of the first plug is connected with a water-sealing ring, which is used to embed into the water-sealing groove.

[0007] By employing the aforementioned technical means, during the connection process between the first and second plugs, the water-sealing ring fits tightly within the water-sealing groove, forming a tight sealing barrier. This sealing structure effectively prevents fluid leakage at the connection point, ensuring the long-term stable operation of the pipeline system. It solves the leakage problem that may occur due to insufficient sealing in traditional connection methods, thereby improving the safety and reliability of pipeline engineering.

[0008] Preferably, the end face of the second plug is provided with a positioning groove, the positioning groove is connected to the slot, a first magnet is embedded on one side of the positioning block, and a second magnet for attracting the first magnet is embedded at the bottom of the positioning groove.

[0009] By employing the aforementioned technical means, when the first plug and the second plug are close together, an attractive force is generated between the magnets, guiding the positioning block to quickly and accurately insert into the positioning slot. This greatly improves the positioning accuracy and avoids connection failures or loose connections caused by inaccurate positioning. It provides a basic guarantee for the normal operation of the self-locking component and ensures the stability and reliability of the pipeline connection.

[0010] Preferably, the outer surfaces of the first plug and the second plug are respectively provided with limiting grooves.

[0011] By employing the aforementioned technical means, cable ties or wires are used to secure the pipeline by wrapping around the inside of the limiting groove. This design effectively prevents displacement or loosening of the pipeline during use, further enhancing the stability and reliability of the pipeline connection and ensuring the normal operation of the pipeline system under various working conditions.

[0012] Preferably, the inner wall of the mounting hole is provided with a groove, the spring is located in the groove, one end of the spring is connected to the bottom of the groove, and the other end of the spring is connected to the locking plate.

[0013] Preferably, the groove is further provided with two sliding pillars, and the locking plate is sleeved on the two sliding pillars and slides along the sliding pillars.

[0014] By employing the above-mentioned technical means, the sliding direction of the locking plate is constrained by the sliding column, which effectively avoids the offset or shaking during the movement of the locking plate and improves the straightness and accuracy of the locking plate movement. At the same time, the sliding column can share the friction between the locking plate and the side wall of the groove, reduce wear, and extend the service life of the locking plate and the spring.

[0015] Preferably, the spring is sleeved on the sliding column.

[0016] By employing the above-mentioned technical means, the sliding column guides the deformation direction of the spring, preventing the spring from bending, twisting, or shifting during compression or extension. This ensures that the elastic force of the spring is always transmitted axially, improving the working efficiency and reliability of the spring, while further enhancing the stability of the locking plate movement.

[0017] Preferably, the end face of the positioning block is provided with a mounting groove, and a sealing plate is provided in the mounting groove, the sealing plate being detachably connected to the positioning block.

[0018] By adopting the above-mentioned technical means, on the one hand, the sealing plate protects the precision components such as springs and sliding columns in the groove; on the other hand, the detachable connection method facilitates the inspection, replacement or maintenance of the components in the groove, reducing the difficulty and cost of later maintenance and improving the practicality and maintainability of the structure.

[0019] Preferably, one end of the locking plate is provided with a first guide slope, and one end of the positioning post is provided with a second guide slope that cooperates with the first guide slope.

[0020] By employing the above-mentioned technical means and utilizing the guiding effect of the inclined plane, the locking plate and the positioning post can be automatically aligned and smoothly contacted when the positioning post is inserted into or withdrawn from the mounting hole. This reduces collisions and jamming during insertion or withdrawal, reduces component wear, and improves the smoothness and accuracy of the positioning operation, thereby enhancing the user's operating experience.

[0021] Compared with the prior art, the beneficial effects of this utility model's technical solution are: This invention proposes a self-locking PVC quick-connect pipe fitting. After inserting the first and second plugs into the two pipes to be connected, the connection is achieved simply by aligning the first and second plugs. The positioning pin on the second plug is inserted into the mounting hole of the positioning block on the first plug. When the positioning pin is inserted into the mounting hole, it abuts against the locking plate inside the hole, pushing the locking plate to slide. Since the locking plate and the positioning block are connected by a spring, when the locking plate is subjected to force, the spring compresses. When the locking groove aligns with the locking plate, the compressed spring returns to its original shape, and the spring's own elasticity pushes the locking plate into the locking groove, instantly completing the self-locking process. The entire process requires no complicated tools, greatly improving installation efficiency. Attached Figure Description

[0022] Figure 1 This is a schematic diagram showing the structure of the self-locking component proposed in an embodiment of the present invention; Figure 2A schematic diagram illustrating the connection of pipes using the quick-connect fittings proposed in the embodiments of this utility model; Figure 3 This diagram illustrates the structure of the second plug according to an embodiment of the present invention. Figure 4 This diagram illustrates the structure of the first plug proposed in an embodiment of the present invention. Figure 5 This diagram illustrates the positioning block structure proposed in an embodiment of the present invention. Figure 6 This is a schematic diagram showing the cross-sectional structure of the self-locking component proposed in an embodiment of the present invention; Figure 7 express Figure 6 Enlarged view at point A; The reference numerals in the attached figures are explained as follows: 1. First pipe; 2. Self-locking assembly; 3. Second pipe; 101. First plug; 102. Positioning block; 103. Water-sealing ring; 104. Groove; 1041. Mounting groove; 1042. Sealing plate; 105. Locking plate; 1051. First guide slope; 106. Sliding column; 107. Spring; 108. First magnet; 109. Mounting hole; 11. Second plug; 12. Slot; 13. Positioning groove; 14. Positioning post; 141. Locking groove; 142. Second guide slope; 15. Second magnet; 16. Water-sealing groove; 17. Limiting groove. Detailed Implementation

[0023] The accompanying drawings are for illustrative purposes only and should not be construed as limiting the scope of this patent. To better illustrate this embodiment, some parts of the accompanying drawings may be omitted, enlarged, or reduced, and do not represent the actual dimensions; It is understandable to those skilled in the art that some well-known details may be omitted from the accompanying drawings.

[0024] The technical solution of this utility model will be further described below with reference to the accompanying drawings and embodiments.

[0025] The positional relationships depicted in the accompanying drawings are for illustrative purposes only and should not be construed as limiting this patent. Example 1 This embodiment proposes a self-locking PVC quick-connect pipe fitting, such as... Figure 1 As shown, it includes a self-locking component 2. In this embodiment, the self-locking component 2 includes a first plug 101 and a second plug 11.

[0026] See Figure 3 and Figure 7The first plug 101 has a positioning block 102 at one end, the positioning block 102 has a mounting hole 109, the mounting hole 109 has a locking plate 105 and a spring 107, one end of the spring 107 is connected to the inner wall of the mounting hole 109, the other end of the spring 107 is connected to the locking plate 105, and the spring 107 is arranged radially along the mounting hole 109.

[0027] One end of the second plug 11 is provided with a positioning post 14, which is used to insert into the mounting hole 109. The positioning post is provided with a locking groove 141. When the positioning post 14 is inserted into the mounting hole 109, the locking plate 105 is inserted into the locking groove 141.

[0028] In this embodiment, see Figure 2 After inserting the first plug 101 and the second plug 11 into the first pipe 1 and the second pipe 3 respectively, the connection only requires a simple mating of the first plug 101 and the second plug 11. The positioning pin 14 on the second plug 11 is inserted into the mounting hole 109 of the positioning block 102 of the first plug 101 to achieve mating. When the positioning pin 14 is inserted into the mounting hole 109 of the positioning block 102, it abuts against the locking plate 105 inside the mounting hole, pushing the locking plate 105 to slide. Since the locking plate 105 and the positioning block 102 are connected by a spring 107, when the locking plate 105 is subjected to force, the spring 107 is compressed. When the locking groove 141 corresponds to the position of the locking plate 105, the compressed spring 107 returns to its original shape, and the spring 107 pushes the locking plate 105 into the locking groove 141 by its own elasticity, instantly completing the self-locking. The entire process requires no complicated tools, greatly improving installation efficiency.

[0029] See Figure 3 In some preferred embodiments, the end face of the second plug 11 is provided with a slot 12 for inserting the first plug 101, and the slot 12 is used for positioning and installing the first plug 101. The bottom of the slot 12 is provided with a water-sealing groove 16, and the end face of the first plug is connected with a water-sealing ring 103, which is used to embed into the water-sealing groove 16.

[0030] In this embodiment, during the docking of the first plug 101 and the second plug 11, the water-sealing ring 103 fits tightly within the water-sealing groove 16, forming a tight sealing barrier. The water-sealing ring 103 is made of a material with excellent elasticity and corrosion resistance, which can maintain good sealing performance during long-term use. The shape and size of the water-sealing ring 103 are perfectly matched with the water-sealing groove 16, and its outer diameter is slightly larger than the inner diameter of the water-sealing groove 16. This generates a certain pre-tightening force during installation to ensure a tight fit. This sealing structure can effectively prevent fluid leakage at the connection point, ensure the long-term stable operation of the pipeline system, solve the leakage problem that may be caused by poor sealing in traditional connection methods, and improve the safety and reliability of pipeline engineering.

[0031] Example 2 In the self-locking PVC quick-connect fitting provided in this embodiment, see... Figure 4 The end face of the second plug 11 is provided with a positioning groove 13, which is connected to the slot 12. A first magnet 108 is embedded on one side of the positioning block 102, and a second magnet 15 for attracting the first magnet 108 is embedded at the bottom of the positioning groove 13.

[0032] In this embodiment, three second magnets 15 are respectively embedded in the inner side of the four positioning slots 13, and a first magnet 108 that attracts them is embedded on one side of the positioning block 102. When the first plug 101 and the second plug 11 are close together, an attractive force is generated between the first magnet 108 and the second magnet 15, guiding the positioning block 102 to quickly and accurately insert into the positioning slot 13. This greatly improves the positioning accuracy and avoids connection failure or loose connection caused by inaccurate positioning. It provides a basic guarantee for the normal operation of the self-locking component and ensures the stability of the pipe connection.

[0033] In the self-locking PVC quick-connect fitting provided in this embodiment, see... Figure 6 Limiting grooves 17 are respectively provided on the outer sides of the first plug 101 and the second plug 11.

[0034] In this embodiment, a limiting groove 17 is created on the outer side of the first plug 101 and the second plug 11. After installation, cable ties or wires are wrapped around the inner side of the limiting groove 17 to secure the pipe. This design effectively prevents the pipe from shifting or loosening during use, further enhancing the stability and reliability of the pipe connection and ensuring the normal operation of the pipeline system under various working conditions.

[0035] In the self-locking PVC quick-connect fitting provided in this embodiment, a groove 104 is provided on the inner side wall of the mounting hole 109, and a spring 107 is located in the groove 104. One end of the spring 107 is connected to the bottom of the groove 104, and the other end of the spring 107 is connected to the locking plate 105. The groove 104 is provided to reduce the volume of the self-locking assembly.

[0036] In the self-locking PVC quick-connect fitting provided in this embodiment, two sliding posts 106 are also provided in the groove 104. The locking plate 105 is sleeved on the two sliding posts 106 and slides along the sliding posts 106. The sliding posts 106 are the moving guides for the locking plate 105, which is conducive to the alignment of the locking plate 105 with the locking groove 141.

[0037] In the self-locking PVC quick-connect fitting provided in this embodiment, the spring 107 is sleeved on the slide column 106.

[0038] In this embodiment, when the locking plate 105 applies pressure to the spring 107, the spring 107 immediately compresses and deforms. Simultaneously, the locking plate 105 slides along the slide post 106 towards the bottom of the groove. When the locking plate 105 slides to align with the locking groove 141, the previously compressed spring 107 begins to return to its original shape, thereby pushing the locking plate 105 to slide along the slide post 106 outwards from the groove. Furthermore, fitting the spring 107 onto the two slide posts 106 provides more reliable support for the locking plate 105, greatly increasing its stability and making the spring 107 more stable under stress, preventing displacement or tilting. Even when the pipeline system is subjected to high pressure, frequent vibration, or complex operating conditions, this stable structure ensures the normal operation of the self-locking function.

[0039] Example 3 In the self-locking PVC quick-connect fitting provided in this embodiment, one end of the locking plate 105 is provided with a first guide slope 1051, and one end of the positioning post 14 is provided with a second guide slope 142 that cooperates with the first guide slope 1051.

[0040] In this embodiment, the first guide slope 1051 extends to the inner side of the positioning block 102, and the other end of the locking plate 105 extends to the outer side of the first plug 101. When the positioning pin 14 is inserted into the positioning block 102, the first guide slope 1051, with its unique slope shape, can convert the linear movement of the positioning pin 14 along the insertion direction into a pushing force on the locking plate 105. Under the action of this pushing force, the locking plate 105 will overcome the elastic force of the spring 107 and move along the sliding pin 106, so that when the positioning pin 14 is inserted into the mounting hole 109, it is beneficial to push the locking plate 105 to move and compress the spring 107.

[0041] In some preferred embodiments, see Figure 5 The end face of the positioning block 102 is provided with a mounting groove 1041, and a sealing plate 1042 is provided in the mounting groove 1041. The sealing plate 1042 is detachably connected to the positioning block 102.

[0042] In this embodiment, the locking plate 105, sliding column 106, and spring 107 are installed inside the groove 104 by the sealing plate 1042. This ensures that the sealing plate 1042 can be stably installed in the mounting groove 1041 under normal use and will not easily fall off. It also makes it convenient to quickly and easily remove the sealing plate 1042 from the positioning block 102 when maintenance, replacement of the sealing plate 1042, or inspection and repair of the inside of the positioning block 102 are required, which greatly improves the convenience of use and maintenance efficiency.

[0043] The embodiments described herein are merely examples to clearly illustrate the present invention and are not intended to limit the implementation of the present invention. Those skilled in the art will recognize that other variations or modifications can be made based on the above description. It is neither necessary nor possible to exhaustively describe all possible implementations here. Any modifications, equivalent substitutions, and improvements made within the spirit and principles of the present invention should be included within the scope of protection of the claims of the present invention.

Claims

1. A PVC quick connect fitting, characterized in that, Includes a self-locking component (2), said self-locking component (2) comprising: A first plug (101) is provided with a positioning block (102) at one end. The positioning block (102) is provided with a mounting hole (109). A locking plate (105) and a spring (107) are provided in the mounting hole (109). One end of the spring (107) is connected to the inner wall of the mounting hole (109), and the other end of the spring (107) is connected to the locking plate (105). The spring (107) is arranged radially along the mounting hole (109). The second plug (11) has a positioning post (14) at one end. The positioning post (14) is used to insert into the mounting hole (109). The positioning post has a locking groove (141). When the positioning post (14) is inserted into the mounting hole (109), the locking plate (105) is inserted into the locking groove (141).

2. The PVC quick-connect fitting according to claim 1, characterized in that, The end face of the second plug (11) is provided with a slot (12) for the insertion of the first plug (101).

3. The PVC quick-connect fitting according to claim 2, characterized in that, The slot (12) has a water-sealing groove (16) at the bottom, and the end face of the first plug is connected to a water-sealing ring (103), which is used to embed into the water-sealing groove (16).

4. The PVC quick-connect fitting according to claim 2, characterized in that, The end face of the second plug (11) is provided with a positioning groove (13), which is connected to the slot (12). A first magnet (108) is embedded on one side of the positioning block (102), and a second magnet (15) for attracting the first magnet (108) is embedded at the bottom of the positioning groove (13).

5. The PVC quick-connect fitting according to claim 1, characterized in that, Limiting grooves (17) are respectively provided on the outer surfaces of the first plug (101) and the second plug (11).

6. The PVC quick-connect fitting according to claim 1, characterized in that, The inner wall of the mounting hole (109) is provided with a groove (104), the spring (107) is located in the groove (104), one end of the spring (107) is connected to the bottom of the groove (104), and the other end of the spring (107) is connected to the locking plate (105).

7. The PVC quick-connect fitting according to claim 6, characterized in that, The groove (104) is also provided with two sliding pillars (106), and the locking plate (105) is sleeved on the two sliding pillars (106) and slides along the sliding pillars (106).

8. The PVC quick-connect fitting according to claim 7, characterized in that, The spring (107) is sleeved on the slide (106).

9. The PVC quick-connect fitting according to any one of claims 6-8, characterized in that, The end face of the positioning block (102) is provided with a mounting groove (1041), and a sealing plate (1042) is provided in the mounting groove (1041). The sealing plate (1042) is detachably connected to the positioning block (102).

10. The PVC quick-connect fitting according to claim 1, characterized in that, One end of the locking plate (105) is provided with a first guide slope (1051), and one end of the positioning post (14) is provided with a second guide slope (142) that cooperates with the first guide slope (1051).

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