Quick connecting pipe fitting for copper pipes
By designing the middleware and nut combination of copper tube quick connections, using the threaded connection of the extrusion ring and the nut, the problems of peeling and leakage of copper tube connectors under high pressure in the prior art are solved, achieving more stable and easy-to-use connection method.
Patent Information
- Application Number
- CN202421239510.X
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-06-03
- Publication Date
- 2025-01-10
- Estimated Expiration
- 2034-06-03
AI Technical Summary
The existing copper tube quick connection parts need to manually expand the end before use. The firmness of the connection depends on friction and is prone to falling off or leaking under high pressure, and softening of the copper tube leads to deformation problems.
Adopt a design including a pipe body, middleware, extrusion ring and nut, where the middleware consists of a lined tube and a stress ring. The extrusion ring is circular, with flat sides and arched in the middle, equipped with a sealing ring The nut is connected by thread, and the elastic deformation of the extrusion ring and the hard extrusion strips are used to enhance the connection strength to ensure sealing.
Enhanced connection stability and sealing effect, avoiding the risks of shedding and leakage, and users can easily install and disassemble without the need for complex tools.
Smart Images
Figure CN222334738U_ABST
Abstract
Description
Technical Field
[0001] The utility model relates to the technical field of pipe fittings, in particular to a copper pipe quick-connect pipe fitting. Background Art
[0002] Copper pipes are widely used in HVAC, water supply systems, gas pipelines and various industrial fluid delivery systems. The main ways to connect copper pipes are brazing and soldering, both of which are cumbersome, require additional equipment and are troublesome to use.
[0003] With the advancement of technology, copper tube quick connectors have emerged. Only one quick connector is needed to connect copper tubes. No additional equipment and materials are required, and it is convenient to use. However, the existing copper tube quick connectors still have certain shortcomings: first, before using the connector, in order to increase the firmness of the connection, the end of the copper tube needs to be expanded into a trumpet shape, which is laborious to do manually; then, the copper tube is connected by clamping, and the firmness of the connection is more inclined to rely on friction. When the pressure inside the tube is too high, it is easy to cause risks such as falling off and leakage; finally, the copper tube is relatively soft and is easily deformed by the hand, which may also cause leakage and falling off. Utility Model Content
[0004] Therefore, in order to solve the above-mentioned prior art problems, the utility model proposes a copper tube quick connection pipe fitting.
[0005] According to an embodiment of the utility model, a copper tube quick-connect fitting comprises a tube body, an intermediate piece, an extrusion ring and a nut, wherein the intermediate piece is composed of an inner liner tube and a stress ring, the diameter of the inner liner tube is smaller than the diameter of the tube body, the stress ring is sleeved at the outer middle position of the inner liner tube and is integrally connected to the inner liner tube, sealing rings are sleeved on the outer sides of both ends of the inner liner tube, extrusion sleeves are fixedly arranged on both sides of the stress ring, the inner hole diameter of the extrusion sleeve is larger than the diameter of the tube body, the extrusion ring is annular as a whole, and the two sides are flat and the middle is arched, a plurality of extrusion strips are arranged in an array on the annular inner wall of the extrusion ring, the nut is sleeved between the tube body and the extrusion sleeve, one end of the nut is slidably sleeved on the tube body, the other end of the nut is sleeved on the extrusion sleeve and is connected to the extrusion sleeve by threaded cooperation, and the inner wall of the nut abuts against the extrusion ring.
[0006] Preferably, the extrusion ring is made of elastically deformable metal material, and the extrusion strip is made of hard material.
[0007] Preferably, the inner diameter of the flat portion of the extrusion ring is larger than the diameter of the tube body, the outer diameter of the flat portion of the extrusion ring is smaller than the inner hole diameter of the extrusion sleeve, and the outer diameter of the arched portion of the extrusion ring is larger than the inner hole diameter of the extrusion sleeve.
[0008] Preferably, support rods are provided at both ends of the inner hole of the liner tube, the number of the support rods is consistent with the number of the extrusion strips, and the support rods are fixedly connected to the liner tube to form a supporting force at the extrusion point.
[0009] Preferably, the inner hole opening of the extrusion sleeve is tapered, so as to ensure the smoothness of the extrusion contact surface when the extrusion ring is deformed by force and enters the interior of the extrusion sleeve.
[0010] Preferably, an annular reinforcing rib is provided on the inner wall of the extrusion sleeve to prevent the extrusion sleeve from being deformed due to stress.
[0011] Beneficial effects:
[0012] 1. The integrated setting of the inner liner and the stress ring enhances the stability of the structure, and the thread matching method of the nut and the extrusion sleeve makes the connection more secure.
[0013] 2. When the extrusion ring enters the extrusion sleeve, the arched part of the extrusion ring is deformed by the extrusion, so that the extrusion strip moves toward the middle, thereby pressing against the tube body and deforming the abutment part of the tube body, thereby strengthening the strength of the tube body connection, avoiding the risk of falling off, and enabling the connection to withstand greater internal pressure without leakage.
[0014] 3. Due to the thread matching mode between the nut and the extrusion sleeve, users can easily install and disassemble this connecting pipe fitting without using complicated tools or professional skills. BRIEF DESCRIPTION OF THE DRAWINGS
[0015] The above and / or additional aspects and advantages of the present invention will become apparent and easily understood from the description of the embodiments in conjunction with the following drawings, in which:
[0016] Figure 1 This is a schematic diagram of the overall structure of a copper tube quick-connect fitting of the utility model;
[0017] Figure 2 This is an exploded view of the overall structure of the extrusion ring in the utility model when it is not in use;
[0018] Figure 3 It is an exploded view of the overall structure of the extrusion ring in the utility model when it is in use;
[0019] Figure 4 The utility model is an assembly diagram of a copper tube quick connection pipe fitting.
[0020] Figure numerals: 1. tube body; 2. middle piece; 3. extrusion ring; 4. nut; 5. sealing ring; 6. support rod; 7. annular reinforcement rib; 21. liner tube; 22. stress ring; 23. extrusion sleeve; 31. extrusion strip. DETAILED DESCRIPTION
[0021] The embodiments of the present utility model are described in detail below. The embodiments described with reference to the accompanying drawings are exemplary. The embodiments of the present utility model are described in detail below.
[0022] Reference below Figure 1-4 A copper tube quick-connect fitting according to an embodiment of the utility model is described, comprising a tube body 1, an intermediate piece 2, an extrusion ring 3 and a nut 4. The intermediate piece 2 is composed of an inner liner 21 and a stress ring 22. The diameter of the inner liner 21 is smaller than the diameter of the tube body 1. The stress ring 22 is sleeved at the middle position of the outer side of the inner liner 21 and is integrally connected to the inner liner 21. Sealing rings 5 are sleeved on the outer sides of both ends of the inner liner 21. Extrusion sleeves 23 are fixedly arranged on both sides of the stress ring 22. The inner hole diameter of the extrusion sleeve 23 is larger than the diameter of the tube body 1. The extrusion ring 3 is annular as a whole, and the two sides are flat and the middle is arched. A plurality of extrusion strips 31 are arranged in an array on the annular inner wall of the extrusion ring 3. The nut 4 is sleeved between the tube body 1 and the extrusion sleeve 23. One end of the nut 4 is slidably sleeved on the tube body 1, and the other end of the nut 4 is sleeved on the extrusion sleeve 23 and is connected to the extrusion sleeve 23 by threaded cooperation. The inner wall of the nut 4 abuts against the extrusion ring 3.
[0023] Specifically, the tube body 1 is used to transport fluids such as coolants. The two tube bodies 1 are connected by an intermediate piece 2. The intermediate piece 2 consists of an inner liner tube 21 and a stress ring 22. The diameter of the inner liner tube 21 is smaller than that of the tube body 1, so that the tube body 1 can be easily put on the inner liner tube 21. The stress ring 22 is located in the middle position of the outer side of the inner liner tube 21 and is integrally connected to it, which increases the stability of the connection and the strength of the structure. The sealing ring 5 is distributed on the outside of both ends of the inner liner tube 21 to play a sealing role to ensure that there is no leakage at the connection. The extrusion sleeve 23 is fixed on both sides of the stress ring 22. The inner hole diameter of the extrusion sleeve 23 is larger than the diameter of the tube body 1 to ensure that the tube body 1 can be smoothly installed. The extrusion ring 3 is in the shape of a circular ring as a whole, with flat sides and an arched middle, and a plurality of extrusion strips 31 are arranged on its inner wall. The nut 4 is used to push the extrusion ring 3 into the gap between the extrusion sleeve 23 and the tube body 1. As the extrusion ring 3 is deformed by the force, the extrusion strip 31 moves toward the middle, presses against the tube body 1, and causes the tube body 1 to deform, thereby increasing the stability of the connection. Among them, the stability of the structure is enhanced by the integrated setting of the liner tube 21 and the force ring 22, and the threaded matching mode of the nut 4 and the extrusion sleeve 23 makes the connection tighter. The presence of the sealing ring 5 and the deformation setting of the extrusion ring 3 ensure that no leakage occurs at the connection, providing a good sealing effect while increasing the stability of the connection. Due to the threaded matching mode of the nut 4 and the extrusion sleeve 23, users can easily install and disassemble this connecting pipe fitting without using complicated tools or professional skills.
[0024] In a preferred embodiment, the extrusion ring 3 is made of an elastically deformable metal material, and the extrusion strip 31 is made of a hard material. During operation, due to the elastic properties of the material, when the nut 4 pushes the extrusion ring 3 into the gap between the extrusion sleeve 23 and the tube body 1, the extrusion ring 3 can be deformed to a limited extent, and this deformation allows the extrusion strip 31 to fit more closely on the surface of the tube body 1. The extrusion strip 31 is made of a hard material, and can maintain its shape and structure when the extrusion ring 3 is subjected to external force, ensuring sufficient rigidity to press against the tube body 1 and deform the abutment of the tube body 1.
[0025] In a preferred embodiment, the inner diameter of the flat part of the extrusion ring 3 is larger than the diameter of the tube body 1, the outer diameter of the flat part of the extrusion ring 3 is smaller than the inner diameter of the extrusion sleeve 23, and the outer diameter of the arched part of the extrusion ring 3 is larger than the inner diameter of the extrusion sleeve 23. During operation, as the nut 4 moves, the extrusion ring 3 is pushed into the extrusion sleeve 23, and in the process of the extrusion ring 3 entering the extrusion sleeve 23, the arched part of the extrusion ring 3 is deformed by extrusion, so that the extrusion strip 31 moves toward the middle, thereby pressing against the tube body 1, and deforming the abutment of the tube body 1, thereby strengthening the strength of the connection of the tube body 1, avoiding the risk of falling off, and enabling the connection to withstand a greater internal pressure without leakage.
[0026] In a preferred embodiment, support rods 6 are provided at both ends of the inner hole of the liner tube 21. The number of the support rods 6 is consistent with the number of the extrusion strips 31, and both are fixedly connected to the liner tube 21 to form a supporting force at the extrusion point.
[0027] In a preferred embodiment, the inner opening of the extrusion sleeve 23 is tapered to ensure the smoothness of the extrusion contact surface when the extrusion ring 3 is deformed by force and enters the interior of the extrusion sleeve 23 .
[0028] Specifically, the inner hole opening of the extrusion sleeve 23 is tapered, so that the diameter of the inner hole opening of the extrusion sleeve 23 is larger than the diameter of the interior thereof, forming a tapered transition area for ensuring the smoothness of the extrusion contact surface when the extrusion ring 3 is deformed by force and enters the interior of the extrusion sleeve 23. When the extrusion ring 3 is subjected to force and begins to deform and enter the extrusion sleeve 23, the tapered opening can reduce the deformation resistance of the extrusion ring 3, allowing the extrusion ring 3 to enter the extrusion sleeve 23 more smoothly, while also ensuring the smoothness of the extrusion contact surface.
[0029] In a preferred embodiment, an annular reinforcing rib 7 is provided on the inner wall of the extrusion sleeve 23 to prevent the extrusion sleeve 23 from being deformed due to stress.
[0030] In a specific implementation manner: the tube body 1 is used to transport fluids such as coolants. The two tube bodies 1 are connected by an intermediate piece 2. The intermediate piece 2 consists of an inner liner tube 21 and a stress ring 22. The diameter of the inner liner tube 21 is smaller than that of the tube body 1, so that the tube body 1 can be easily put on the inner liner tube 21. The stress ring 22 is located in the middle position of the outer side of the inner liner tube 21 and is integrally connected to it, which increases the stability of the connection and the strength of the structure. The sealing ring 5 is distributed on the outside of both ends of the inner liner tube 21 to play a sealing role to ensure that there is no leakage at the connection. The extrusion sleeve 23 is fixed on both sides of the stress ring 22. The inner hole diameter of the extrusion sleeve 23 is larger than the diameter of the tube body 1 to ensure that the tube body 1 can be smoothly installed. The extrusion ring 3 is annular in shape as a whole, flat on both sides and arched in the middle. A plurality of extrusion strips 31 are arranged on its inner wall. The extrusion ring 3 is pushed into the gap between the extrusion sleeve 23 and the tube body 1 through the nut 4. During the process of the extrusion ring 3 entering the extrusion sleeve 23, the arched part of the extrusion ring 3 is deformed by the extrusion, so that the extrusion strip 31 moves toward the middle, thereby pressing against the tube body 1 and causing the abutment of the tube body 1 to deform, thereby strengthening the strength of the connection of the tube body 1 and avoiding the risk of falling off, so that the connection can withstand a greater internal pressure without leakage. Among them, the stability of the structure is enhanced by the integrated setting of the liner tube 21 and the force ring 22, and the threaded matching method of the nut 4 and the extrusion sleeve 23 makes the connection tighter. The presence of the sealing ring 5 and the deformation setting of the extrusion ring 3 ensure that no leakage occurs at the connection, provide a good sealing effect, and increase the stability of the connection. Due to the threaded matching method of the nut 4 and the extrusion sleeve 23, users can easily install and disassemble this connecting pipe without using complicated tools or professional skills.
[0031] Although the embodiments of the present invention have been shown and described, those skilled in the art will appreciate that various changes, modifications, substitutions and variations may be made to the embodiments without departing from the principles and spirit of the present invention, and that the scope of the present invention is defined by the claims and their equivalents.
Claims
1. A copper tube quick-connect fitting, characterized in that: include: tube body(1); An intermediate component (2), the intermediate component (2) being composed of an inner liner tube (21) and a stress ring (22), the diameter of the inner liner tube (21) being smaller than the diameter of the tube body (1), the stress ring (22) being sleeved at the middle position outside the inner liner tube (21) and being integrally connected to the inner liner tube (21), both ends of the inner liner tube (21) being sleeved with sealing rings (5), and both sides of the stress ring (22) being fixedly provided with extrusion sleeves (23), the inner hole diameter of the extrusion sleeve (23) being larger than the diameter of the tube body (1); An extrusion ring (3), the extrusion ring (3) being in the shape of a circular ring as a whole, with two flat sides and an arched middle, and a plurality of extrusion strips (31) being arranged in an array on the inner ring wall of the extrusion ring (3); A nut (4), wherein the nut (4) is sleeved between the tube body (1) and the extrusion sleeve (23), one end of the nut (4) is slidably sleeved on the tube body (1), and the other end of the nut (4) is sleeved on the extrusion sleeve (23) and connected to the extrusion sleeve (23) by means of threaded engagement, and the inner wall of the nut (4) is in contact with the extrusion ring (3).
2. A copper tube quick-connect fitting according to claim 1, characterized in that: The extrusion ring (3) is made of an elastically deformable metal material, and the extrusion strip (31) is made of a hard material.
3. A copper tube quick-connect fitting according to claim 2, characterized in that: The inner diameter of the flat part of the extrusion ring (3) is larger than the diameter of the tube body (1), the outer diameter of the flat part of the extrusion ring (3) is smaller than the inner hole diameter of the extrusion sleeve (23), and the outer diameter of the arched part of the extrusion ring (3) is larger than the inner hole diameter of the extrusion sleeve (23).
4. The copper tube quick-connect fitting according to claim 1, characterized in that: Support rods (6) are provided at both ends of the inner hole of the lining tube (21); the number of the support rods (6) is consistent with the number of the extrusion strips (31), and they are all fixedly connected to the lining tube (21) to form a supporting force at the extrusion point.
5. The copper tube quick-connect fitting according to claim 1, characterized in that: The inner opening of the extrusion sleeve (23) is tapered, so as to ensure the smoothness of the extrusion contact surface when the extrusion ring (3) is deformed by force and enters the interior of the extrusion sleeve (23).
6. The copper tube quick-connect fitting according to claim 1, characterized in that: An annular reinforcing rib (7) is provided on the inner wall of the extrusion sleeve (23) to prevent the extrusion sleeve (23) from being deformed due to stress.