Quick-connection plastic pipe fitting

Abstract

The utility model discloses a quick-connection plastic pipe fitting, which relates to the field of plastic pipe fittings and comprises a quick-connection pipe fitting body, a fixing ring is fixed at one end of the quick-connection pipe fitting body, threads are arranged on the outer wall of the fixing ring, one side of the fixing ring is connected with a connection cap, a fixing ring is arranged in the connection cap, and the outer wall of the fixing ring is provided with threads. A first buckle ring is arranged in the quick connecting pipe fitting body, and a second buckle ring is installed in the quick connecting pipe fitting body. The first buckle ring and the second buckle ring which are different in size are arranged in the quick-connecting pipe fitting body, water pipes with different calibers can be inserted into the two sides of the quick-connecting pipe fitting body, the connecting cap is rotationally fixed to the fixing ring at the end opening of the quick-connecting pipe fitting body, and in the process of rotationally fixing the connecting cap, the water pipes can be inserted into the quick-connecting pipe fitting body. And the inner wall of the connecting cap slowly extrudes the outer wall of one end of the fixing ring, so that the extrusion block at the end opening of the fixing ring shrinks to extrude the water pipe inside, and two water pipes with different calibers are connected and fixed through the quick connecting pipe fitting body.

Description

Technical Field

[0001] The utility model relates to the field of plastic pipe fittings, and specifically relates to a quick-connect plastic pipe fitting. Background Technique

[0002] Plastic water pipes are pipes made of plastic materials for transporting water or other liquids. Common plastic water pipe materials include polyethylene (PE), polypropylene (PP), polyvinyl chloride (PVC), etc. These plastics have good corrosion resistance, chemical resistance, and mechanical properties, and can be used stably for a long time under different environmental conditions. They are widely used in fields such as household water supply and drainage, industrial pipelines, etc., bringing great convenience to people's lives and production.

[0003] There are various connection methods between plastic water pipes. Among them, hot melt connection is usually used in daily life. Hot melt connection is an efficient and reliable connection method. It mainly heats the pipe and the connection pipe fitting with a matching diameter to make them reach a softened state, and then accurately docks the two pipes to the connection pipe fitting. At this time, the melted materials are tightly combined and form a firm connection after cooling.

[0004] This fixing method of connecting two pipes by hot melting and softening the pipe and the connection pipe fitting, although the connected pipes have good sealing performance, this connection method can only connect pipes with a fixed diameter size and it is difficult to connect two pipes with different diameters. Content of the Utility Model

[0005] Based on this, the purpose of the utility model is to provide a quick-connect plastic pipe fitting to solve the technical problem that traditional water pipe connection plastic pipe fittings can only achieve the connection between water pipes with the same diameter size.

[0006] To achieve the above purpose, the utility model provides the following technical solution: A quick-connect plastic pipe fitting, including a quick-connect pipe fitting body. One end of the quick-connect pipe fitting body is fixed with a fixing ring, and threads are provided on the outer wall of the fixing ring. A connection cap is connected to one side of the fixing ring, and a fixing ring is arranged inside the connection cap. A first snap ring is arranged inside the quick-connect pipe fitting body, and a second snap ring is installed inside the quick-connect pipe fitting body.

[0007] By adopting the above technical solution, different-sized first snap rings and second snap rings are arranged inside the quick-connect pipe body. Pipes with different calibers can be inserted into both sides of the quick-connect pipe body. The port of the large-caliber pipe is sleeved on the outer wall of the first snap ring, and the port of the small-caliber pipe is sleeved on the outer wall of the second snap ring. Then, the connecting cap is rotated and fixed on the fixing ring at the port of the quick-connect pipe body. During the process of rotating and fixing the connecting cap, the inner wall of the connecting cap slowly squeezes the outer wall of one end of the fixing ring, causing the extrusion block at the port of the fixing ring to contract and squeeze the internal pipe, thereby realizing the connection and fixation of two pipes with different calibers through the quick-connect pipe body.

[0008] The present utility model is further configured such that a first groove is formed on the outer wall of the first snap ring, and a first sealing ring is installed inside the first groove.

[0009] By adopting the above technical solution, the first snap ring can be inserted into the inner wall of the pipe. When the fixing ring squeezes and fixes the pipe, the end of the pipe is in close contact with the first sealing ring in the first groove. The first sealing ring seals the pipe buckled in the first groove to prevent water leakage from occurring when the pipe is buckled in the first groove.

[0010] The present utility model is further configured such that a second groove is formed on the outer wall of the second snap ring, and a second sealing ring is installed inside the second groove.

[0011] By adopting the above technical solution, the second snap ring can be inserted into the inner wall of the pipe with a smaller caliber. When the pipe is in close contact with the second groove, the second sealing ring seals the pipe to prevent water leakage of the pipe with a smaller caliber inside the quick-connect pipe body.

[0012] The present utility model is further configured such that a fastening groove is formed on the outer wall of the fixing ring, and the inner wall width of the fastening groove gradually increases from small to large.

[0013] By adopting the above technical solution, when the connecting cap is rotated and fixed on the fixing ring, the inner wall of the connecting cap slowly squeezes the fixing ring, causing the end of the fixing ring to be squeezed and contracted inward, thereby fixing the pipe inserted into the quick-connect pipe body.

[0014] The present utility model is further configured such that an extrusion block is fixed on the inner wall of one side of the fixing ring, and an anti-slip material is provided on the inner wall of the extrusion block.

[0015] By adopting the above technical solution, when the connecting cap squeezes the fixing ring to make it contract, the extrusion block at one end of the fixing ring contacts the outer wall of the pipe, and the anti-slip material provided on the inner wall of the extrusion block increases the friction between the extrusion block and the pipe, preventing the pipe from separating from the extrusion block.

[0016] The present utility model is further configured such that the diameter at the port of the connection cap is greater than the diameter of the first snap ring.

[0017] By adopting the above technical solution, the first snap ring snaps onto the largest-diameter water pipe that the quick-connect fitting body can connect, enabling the water pipe to be inserted into the interior of the connection cap and the fixing ring, and further enabling the connection cap and the fixing ring to fixedly connect to the water pipe.

[0018] The present utility model is further configured such that the second snap ring is smaller than the first snap ring.

[0019] By adopting the above technical solution, the second snap ring snaps onto the smallest-diameter water pipe that the quick-connect fitting body can connect, while the first snap ring snaps onto the smallest-diameter water pipe that the quick-connect fitting body can connect, facilitating the connection and fixation of water pipes of different diameters by the quick-connect fitting body.

[0020] The present utility model is further configured such that the diameter size on one side of the connection cap is smaller than the diameter size on the other end.

[0021] By adopting the above technical solution, a thread is provided at the larger-diameter end of the connection cap, facilitating the fixed connection of the connection cap to the fixing ring by the user. The inner diameter of the connection cap is set to gradually decrease from large to small, such that during the process of rotationally connecting and fixing the connection cap to the fixing ring, the inner wall of the connection cap can squeeze the fixing ring, causing the fixing ring to squeeze and fix the water pipe.

[0022] In summary, the present utility model mainly has the following beneficial effects:

[0023] 1. By providing a quick-connect fitting body, a connection cap, a fixing ring, a first snap ring, and a second snap ring, the present utility model solves the problem that traditional plastic pipe fittings for water pipe connections can only achieve connections between water pipes of the same diameter. Different-sized first and second snap rings are provided inside the quick-connect fitting body. Both sides of the quick-connect fitting body can insert water pipes of different diameters. The port of the large-diameter water pipe is sleeved on the outer wall of the first snap ring, and the port of the small-diameter water pipe is sleeved on the outer wall of the second snap ring. Then, the connection cap is rotationally fixed to the fixing ring at the port of the quick-connect fitting body. During the process of rotationally fixing the connection cap, the inner wall of the connection cap slowly squeezes the outer wall of one end of the fixing ring, causing the extrusion block at the port of the fixing ring to contract and squeeze the internal water pipe, thereby achieving the connection and fixation of two water pipes of different diameters through the quick-connect fitting body.

[0024] 2. The utility model sets a first sealing ring, a first groove, a second snap ring, a second groove and an extrusion block. The first groove and the second groove are respectively arranged on the outer walls of the first snap ring and the second snap ring. At the same time, the first sealing ring and the second sealing ring with matching sizes are placed inside the first groove and the second groove. When the extrusion block at the end of the fixing ring extrudes the outer wall of the fixed water pipe, the port of the water pipe extrudes the first sealing ring, and the first sealing ring will prevent the water source from flowing out from the gap between the water pipe and the first snap ring, thereby playing a good sealing role in the connection between the water pipe and the quick-connect fitting body. BRIEF DESCRIPTION OF THE DRAWINGS

[0025] Figure 1 is a schematic diagram of the overall device of the utility model;

[0026] Figure 2 is a schematic diagram of the interior of the device of the utility model;

[0027] Figure 3 is a connection diagram of some components of the device of the utility model;

[0028] Figure 4 is a structural diagram of the fixing ring of the utility model;

[0029] Figure 5 is a cross-sectional view of the quick-connect fitting body of the utility model.

[0030] In the figure: 1. Quick-connect fitting body; 2. Connecting cap; 3. Fixing ring; 4. Fixing ring; 5. First snap ring; 51. First groove; 6. First sealing ring; 7. Second snap ring; 71. Second groove; 8. Second sealing ring; 9. Extrusion block; 10. Fastening groove. DETAILED DESCRIPTION OF THE EMBODIMENTS

[0031] Next, the technical solutions in the embodiments of the present utility model will be clearly and completely described in conjunction with the accompanying drawings in the embodiments of the present utility model. The embodiments described below by referring to the drawings are exemplary and are only used to explain the present utility model and should not be construed as a limitation to the present utility model.

[0032] Next, the embodiments of the present utility model will be described according to its overall structure.

[0033] A quick-connect plastic pipe fitting, such as Figure 1 - Figure 5As shown in the figure, it includes a quick-connect fitting body 1. One end of the quick-connect fitting body 1 is fixed with a fixing ring 4, and the outer wall of the fixing ring 4 is provided with threads. One side of the fixing ring 4 is connected with a connecting cap 2, and a fixing ring 3 is arranged inside the connecting cap 2. A first snap ring 5 is arranged inside the quick-connect fitting body 1, and a second snap ring 7 is installed inside the quick-connect fitting body 1. The first snap ring 5 and the second snap ring 7 with different sizes are arranged inside the quick-connect fitting body 1. Both sides of the quick-connect fitting body 1 can insert water pipes with different calibers. The port of the large-caliber water pipe is sleeved on the outer wall of the first snap ring 5, and the port of the small-caliber water pipe is sleeved on the outer wall of the second snap ring 7. Then the connecting cap 2 is rotated and fixed on the fixing ring 4 at the port of the quick-connect fitting body 1. During the process of rotating and fixing the connecting cap 2, the inner wall of the connecting cap 2 slowly squeezes the outer wall of one end of the fixing ring 3, so that the extrusion block 9 at the port of the fixing ring 3 contracts and squeezes the internal water pipe, thereby realizing the connection and fixation of two water pipes with different calibers through the quick-connect fitting body 1.

[0034] Please refer to Figure 2 , a first groove 51 is opened on the outer wall of the first snap ring 5, and a first sealing ring 6 is installed inside the first groove 51. The first snap ring 5 can be inserted into the inner wall of the water pipe. When the fixing ring 3 squeezes and fixes the water pipe, the end of the water pipe is in close contact with the first sealing ring 6 in the first groove 51. The first sealing ring 6 seals the water pipe buckled in the first groove 51 to prevent water leakage from occurring when the water pipe is buckled in the first groove 51.

[0035] Please refer to Figure 2 , a second groove 71 is opened on the outer wall of the second snap ring 7, and a second sealing ring 8 is installed inside the second groove 71. The second snap ring 7 can be inserted into the inner wall of the water pipe with a smaller caliber. When the water pipe is in close contact with the second groove 71, the second sealing ring 8 seals the water pipe to prevent water leakage of the water pipe with a smaller caliber inside the quick-connect fitting body 1.

[0036] Please refer to Figure 4 , a fastening groove 10 is opened on the outer wall of the fixing ring 3, and the inner wall width of the fastening groove 10 gradually increases from small to large. When the connecting cap 2 is rotated and fixed on the fixing ring 4, the inner wall of the connecting cap 2 slowly squeezes the fixing ring 3, so that the end of the fixing ring 3 is squeezed and contracted inward, thereby fixing the water pipe inserted into the quick-connect fitting body 1.

[0037] Please refer to Figure 4 , an extrusion block 9 is fixed on the inner wall of one side of the fixing ring 3, and an anti-slip material is arranged on the inner wall of the extrusion block 9. When the connecting cap 2 squeezes the fixing ring 3 to make it contract, the extrusion block 9 at one end of the fixing ring 3 contacts the outer wall of the water pipe, and the anti-slip material arranged on the inner wall of the extrusion block 9 increases the friction between the extrusion block 9 and the water pipe, preventing the water pipe from separating from the extrusion block 9.

[0038] Please refer to Figure 1 and Figure 2 The diameter at the port of the connecting cap 2 is greater than the diameter of the first snap ring 5. The first snap ring 5 snaps onto the largest-diameter water pipe that the quick-connect fitting body 1 can connect, enabling the water pipe to be inserted into the interior of the connecting cap 2 and the fixing ring 3, and further enabling the connecting cap 2 and the fixing ring 3 to fixedly connect to the water pipe.

[0039] Please refer to Figure 2 The second snap ring 7 is smaller than the first snap ring 5. The second snap ring 7 snaps onto the smallest-diameter water pipe that the quick-connect fitting body 1 can connect, while the first snap ring 5 snaps onto the smallest-diameter water pipe that the quick-connect fitting body 1 can connect, facilitating the connection and fixation of water pipes of different diameters using the quick-connect fitting body 1 by personnel.

[0040] Please refer to Figure 3 The caliber size on one side of the connecting cap 2 is smaller than that on the other end. The larger-diameter end of the connecting cap 2 is provided with threads, facilitating the personnel to fixedly connect the connecting cap 2 to the fixing ring 4. The diameter of the inner wall of the connecting cap 2 is set to gradually decrease from large to small, such that during the process of rotatably connecting and fixing the connecting cap 2 to the fixing ring 4, the inner wall of the connecting cap 2 can squeeze the fixing ring 3, causing the fixing ring 3 to squeeze and fix the water pipe.

[0041] The working principle of the present utility model is as follows: First, rotate and remove the connecting cap 2 and the fixing ring 3 on both sides of the quick-connect fitting body 1 from the fixing ring 4, slip the connecting cap 2 and the fixing ring 3 onto the outer wall of the water pipe in sequence, then insert the water pipe to be connected into the interior of the quick-connect fitting body 1. Depending on the size of the water pipe caliber, select whether to snap the water pipe port onto the first snap ring 5 or the second snap ring 7. Slip the port of the water pipe onto the outer wall of the first snap ring 5, and the port of the water pipe contacts the first sealing ring 6. Due to the extrusion of the water pipe, the first sealing ring 6 blocks the water in the water pipe from leaking out at the connection between the water pipe and the first snap ring 5. Then, rotate and fix the connecting cap 2 onto the fixing ring 4 at the port of the quick-connect fitting body 1. During the process of rotatably fixing the connecting cap 2, the inner wall of the connecting cap 2 slowly squeezes the outer wall of one end of the fixing ring 3, causing the extrusion block 9 at the port of the fixing ring 3 to contract and squeeze the internal water pipe, thereby fixedly connecting the water pipe to the quick-connect fitting body 1.

[0042] Although the embodiments of the present utility model have been shown and described, the specific embodiments are merely explanations of the present utility model and not limitations thereto. The specific features, structures, materials, or characteristics described can be combined in a suitable manner in any one or more embodiments or examples. After reading this specification, those skilled in the art can, without departing from the principles and purposes of the present utility model, make modifications, substitutions, and variations that do not contribute creatively to the embodiments as needed, but as long as they are within the scope of the claims of the present utility model, they are protected by the patent law.

Claims

1. A quick-connect plastic pipe fitting, comprising a quick-connect pipe fitting body (1), characterized in that: One end of the quick-connect fitting body (1) is fixed with a fixing ring (4), and the outer wall of the fixing ring (4) is provided with threads. One side of the fixing ring (4) is connected with a connecting cap (2), and a fixing ring (3) is arranged inside the connecting cap (2). A first snap ring (5) is arranged inside the quick-connect fitting body (1), and a second snap ring (7) is installed inside the quick-connect fitting body (1).

2. The quick-connect plastic pipe fitting according to claim 1, characterized in that: The outer wall of the first snap ring (5) is provided with a first groove (51), and a first sealing ring (6) is installed inside the first groove (51).

3. A quick-connect plastic pipe fitting according to claim 1, characterized in that: The outer wall of the second snap ring (7) is provided with a second groove (71), and a second sealing ring (8) is installed inside the second groove (71).

4. A quick-connect plastic pipe fitting according to claim 1, characterized in that: The outer wall of the fixing ring (3) is provided with a fastening groove (10), and the inner wall width of the fastening groove (10) increases from small to large.

5. A quick-connect plastic pipe fitting according to claim 1, characterized in that: One side of the inner wall of the fixing ring (3) is fixed with an extrusion block (9), and the inner wall of the extrusion block (9) is provided with an anti-slip material.

6. A quick-connect plastic pipe fitting according to claim 1, characterized in that: The diameter of the port of the connecting cap (2) is larger than the diameter of the first snap ring (5).

7. A quick-connect plastic pipe fitting according to claim 1, characterized in that: The second snap ring (7) is smaller than the first snap ring (5).

8. A quick-connect plastic pipe fitting according to claim 1, characterized in that: The caliber size of one side of the connecting cap (2) is smaller than the caliber size of the other end.

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