Copper joint without brazing connection technology
By adopting brazing-free connection technology and a specific shape of elastic material structure in copper joints, the problems of loosening and leakage of copper joints in high-pressure environments are solved, automatic locking and sealing are achieved, and service life is extended.
Patent Information
- Application Number
- CN202421268646.3
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-06-05
- Publication Date
- 2025-01-17
- Estimated Expiration
- 2034-06-05
AI Technical Summary
Existing copper joints are prone to loosening in high-pressure gas or liquid environments, resulting in leakage and pose safety risks of misoperation.
Copper joints without brazing connection technology are automatically used to automatically use elastic materials to automatically under high pressure conditions by setting hexagonal coupling nuts, annular grooves, trapezoidal rings, elastic barrier rings and annular pressing structures on the connecting pipes and coupling nuts. Lock to ensure the stability and sealing of the connection.
The self-locking mechanism of copper joints under high pressure conditions is realized to prevent loosening and leakage, improve sealing and reliability, and extend the service life of the joint through the use of elastic materials.
Smart Images
Figure CN222363514U_ABST
Abstract
Description
Technical Field
[0001] The utility model relates to the technical field of copper pipe fittings, in particular to a copper joint without soldering connection technology. Background Art
[0002] Solderless connection technology is a method of connection without the use of traditional welding materials. It uses heat and pressure to fuse the materials between the contact surfaces to achieve connection. Solderless connection technology has many advantages. First, it does not require the addition of additional welding materials, reducing material costs and the risk of weakened welds. Secondly, since there is no molten metal liquid in the solderless connection process, no welding slag is generated, which improves the quality and appearance of the weld. In addition, since there is no evaporation and dissolution of welding materials in the solderless connection process, the strength of the connection is usually higher than that of traditional welding. In addition, solderless connection technology can also be used to connect different kinds of materials, such as connections between different metals. Copper pipe fittings are parts that connect pipes in hydraulic systems or install pipes on hydraulic components. It is a general term for connectors that can be assembled and disassembled. Copper pipe fittings are mainly used to transfer liquids or gases from one pipeline to another, while also providing the ability to easily connect and disconnect. In hydraulic systems, copper pipe fittings play a vital role. They can not only connect pipes of different sizes and types, but also realize multiple functions in the system, such as diversion, confluence, and steering. According to specific needs, copper pipe fittings can adopt different designs and structures to meet different application scenarios and working conditions. Hydraulic hose is a common type of copper pipe fitting, which consists of flexible metal pipes and connectors, and can transmit fluids in high-pressure hydraulic systems. High-pressure ball valve is a joint that controls the flow of fluid by rotating the ball, and it has the ability to quickly switch on and off the fluid. Quick connector is a connector that is easy to connect and disconnect, and is common in scenarios where equipment or parts need to be replaced frequently. Welded pipe fittings are a joint that connects copper pipes by welding, which provides a strong connection and high sealing. Compression fittings connect copper pipes through sleeve fittings and ferrules to achieve fast assembly and disassembly and reliable connection. Other types of copper pipe fittings include transition pipe fittings, tee pipe fittings, flared pipe fittings, right-angle pipe fittings, etc., which provide flexible connection solutions according to different needs and application scenarios. With the development of society, the demand for copper fittings based on braze-free connection technology of copper pipe fittings is becoming more and more widespread. Braze-free connection technology can achieve the connection of copper pipe fittings without using traditional welding materials, avoiding the defects and problems that may occur in the traditional welding process. This connection method has the advantages of high connection strength, no need for additional welding materials, and no welding slag, so it has been widely used in hydraulic systems and other industrial fields. In general, copper pipe fittings are indispensable connectors in hydraulic systems. They provide convenient, reliable and efficient pipe connection solutions. With the continuous development and application of solderless connection technology, the application of copper fittings in hydraulic systems and other fields will continue to expand.
[0003] Existing copper joints usually use threads to connect the two ends of the pipe. However, this connection method may face some problems when high-pressure gas or liquid is passed into the pipe. First, due to the frequent changes in internal pressure, the threaded connection is prone to loosening. This may cause leakage, thus affecting the normal operation of the system. Secondly, if the staff is unaware that there is high-pressure gas or liquid inside and unscrews the copper joint under inappropriate circumstances, it may cause safety hazards. Utility Model Content
[0004] 1. Technical issues to be resolved
[0005] In view of the deficiencies in the prior art, the utility model provides a copper joint with a solderless connection technology, which has the advantages of remaining stable and not loosening when gas or liquid is filled inside the copper joint, and automatically locking when subjected to high-pressure liquid or gas. It solves the problem that traditional threaded connections are prone to loosening when facing repeated fluctuations in internal pressure, and prevents the problem of the copper joint loosening due to operator misoperation under high-pressure conditions.
[0006] (II) Technical solution
[0007] In order to ensure that the copper joint remains stable and does not loosen when gas or liquid is filled inside, and has the purpose of automatically locking when subjected to high-pressure liquid or gas, the utility model provides the following technical solutions: a copper joint without soldering connection technology, comprising a connecting pipe and a connecting nut, the connecting pipe having the connecting nut coaxially fixedly installed in the middle, threads being provided on the outer walls of the connecting pipe at both ends of the connecting nut, the inner ring shape of the connecting nut being hexagonal, the outer wall shape of the connecting pipe at the position where the connecting nut is fixed being hexagonal, an annular groove being provided inside the connecting pipe at the position of the connecting nut, a trapezoidal ring being provided on the periphery of the annular groove, the trapezoidal ring being a hexagon matching the connecting nut when viewed from the side, the trapezoidal ring being made of elastic material, elastic retaining rings being fixedly installed at both ends of the trapezoidal ring, both ends of the trapezoidal ring being fixed in the annular groove, an annular pressing sheet being further provided in the annular groove, and a trapezoidal protrusion being provided on the outer side of the pressing sheet.
[0008] Preferably, the pressing sheet is made of elastic material, the trapezoidal area of the raised cross section is larger than the trapezoidal area of the trapezoidal ring cross section, and the inner diameter of the pressing sheet is smaller than the inner diameter of the connecting pipe.
[0009] Preferably, a cavity is provided between the pressing sheet and the annular groove, and the side view profile of the protrusion is hexagonal.
[0010] Preferably, the inner walls at both ends of the connecting pipe are provided with flared openings.
[0011] Preferably, the top of the trapezoidal ring is fixedly connected to the connecting nut.
[0012] Preferably, gaskets are fixedly mounted on both sides of the elastic retaining ring.
[0013] Preferably, the trapezoidal ring and the connecting pipe are sealed.
[0014] (III) Beneficial effects
[0015] Compared with the prior art, the utility model provides a copper joint without soldering connection technology, which has the following beneficial effects:
[0016] 1. The copper joint of this solderless connection technology uses a trapezoidal ring structure, a pressing plate structure, an elastic retaining ring structure, and a gasket. Compared with the traditional technical structure, when high-pressure gas or liquid passes into the pipeline, the increase in internal pressure will squeeze the annular pressing plate located inside the connecting pipe, causing it to embed into the annular groove. The pressing plate is designed with a raised trapezoidal structure, and the volume of this raised part is larger than the internal space of the elastic trapezoidal ring. Therefore, during the process of the pressing plate being squeezed in, the trapezoidal ring will be squeezed and expand outward. The expansion of the trapezoidal ring causes the elastic retaining ring to slide outward, increasing the pressure of the gasket on the end face of the pipe, thereby improving the friction and sealing. This process forms a self-locking mechanism, which ensures the reliability and sealing of the pipeline connection under high pressure conditions and prevents leakage.
[0017] 2. The copper joint of this solderless connection technology uses an elastic baffle structure in conjunction with a trapezoidal ring structure. Compared with the traditional technical structure, this structure can play a better shock-absorbing role, absorbing the vibration and impact that may be generated during the use of the pipeline. At the same time, it can also buffer the thermal expansion or contraction caused by temperature changes. Moreover, the trapezoidal ring and elastic baffle of the elastic material can return to their original state after the connection is released, which means that the copper joint can be reused, thereby improving the service life and economy of the joint. BRIEF DESCRIPTION OF THE DRAWINGS
[0018] Figure 1 It is a schematic diagram of the three-dimensional structure of the copper joint of the solderless connection technology of the utility model;
[0019] Figure 2 This is a structural front view of a copper joint of the utility model using a solder-free connection technology;
[0020] Figure 3 It is a structural side view of the copper joint of the utility model without soldering connection technology;
[0021] Figure 4 It is a structural AA cross-sectional view of the copper joint of the utility model without soldering connection technology;
[0022] Figure 5 This is a structural side view of the copper joint of the utility model using the solderless connection technology with the connection nut and the elastic retaining ring removed.
[0023] In the figure: 1-connecting pipe, 2-connecting nut, 3-thread, 4-annular groove, 5-trapezoidal ring, 6-gasket, 7-elastic retaining ring, 8-pressing sheet, 9-protrusion, 10-expansion. DETAILED DESCRIPTION
[0024] The following will be combined with the drawings in the embodiments of the utility model to clearly and completely describe the technical solutions in the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, not all of the embodiments. Based on the embodiments in the utility model, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the utility model.
[0025] See also Figure 1 , Figure 2 , Figure 3 , Figure 4 , a copper joint with solderless connection technology, including a connecting pipe 1 and a connecting nut 2. The connecting nut 2 is coaxially fixedly installed in the middle of the connecting pipe 1. The connecting nut 2 is designed to facilitate the use of tools for tightening or loosening, mainly to provide sufficient surface area so that a wrench or other tools can easily grasp and apply torque, thereby achieving the tightening or release of the connector. Threads 3 are provided on the outer wall of the connecting pipe 1 at both ends of the connecting nut 2. The inner ring of the connecting nut 2 is hexagonal in shape. The outer wall shape of the connecting pipe 1 at the position where the connecting nut 2 is fixed is hexagonal. The inner ring of the connecting nut 2 and the outer wall shape of the connecting pipe 1 at the position where the connecting nut 2 is fixed are hexagonal, which can make the fixing of the connecting pipe 1 and the connecting nut 2 more stable. An annular groove 4 is provided inside the connecting pipe 1 at the position of the connecting nut 2. A trapezoidal ring 5 is arranged on the periphery of the annular groove 4. The trapezoidal ring 5 is a hexagon matching the connecting nut 2 when viewed from the side. Figure 5As shown, the trapezoidal ring 5 is made of elastic material. As a part made of elastic material, the trapezoidal ring 5 can expand outward when the pressing plate 8 is pressed in, thereby enhancing the sealing performance at the joint. This expansion effect enables the joint to adapt to the slight size difference between the pipes, maintain an airtight or liquid-tight state, and prevent medium leakage. It can also play a certain shock-absorbing role, absorbing the vibration and impact that may be generated during the use of the pipe, and can also buffer the thermal expansion or contraction caused by temperature changes. Moreover, the trapezoidal ring 5 of elastic material can be restored to its original state after the connection is released, which means that the copper joint can be reused, improving the service life and economy of the joint. Elastic retaining rings 7 are fixedly installed at both ends of the trapezoidal ring 5. The core function of the elastic retaining ring 7 is to ensure that the position of the trapezoidal ring 5 in the annular groove 4 is stable. Its existence ensures that the trapezoidal ring 5 will not deviate from its set position even when under pressure, maintaining the effectiveness of the joint seal and the stability of the overall structure. Under high pressure, the extrusion of the internal annular pressing plate 8 will cause the trapezoidal ring 5 to expand outward, and the elastic retaining ring 7 will move outward accordingly, enhancing the contact pressure and friction between the gasket 6 and the end face of the pipe. This mechanism greatly helps the joint to achieve a self-locking state and prevents loosening due to pressure. In addition, after being subjected to pressure, the elastic retaining ring 7 can play the role of its elastic reaction force, which helps the joint to return to its original state after the pressure is relieved, thereby allowing it to be used multiple times. The elastic retaining ring 7 can also continue to maintain the stability of the sealing performance when the pipeline expands or contracts due to vibration or temperature changes. As a protective and supporting device for the trapezoidal ring 5, the elastic retaining ring 7 can prevent the trapezoidal ring 5 from being damaged or deformed during pipeline connection and use, especially in the face of torque or physical stress caused by temperature difference. In terms of installation and disassembly, the elastic retaining ring 7 provides convenience, ensuring that the trapezoidal ring 5 and the pressing plate 8 can be accurately positioned during assembly and can be easily disassembled when necessary. The two ends of the trapezoidal ring 5 are fixed in the annular groove 4, and an annular pressing sheet 8 is also arranged in the annular groove 4. A trapezoidal protrusion 9 is arranged on the outside of the pressing sheet 8. When high-pressure gas or liquid is passed into the connecting pipe 1, the increase in internal pressure will exert an extrusion force on the annular pressing sheet 8, thereby pushing the pressing sheet 8 to be completely embedded in the internal annular groove 4. At the same time, the trapezoidal protrusion 9 on the pressing sheet 8 is also pressed into the elastic trapezoidal ring 5. Since the volume of the protrusion 9 of the pressing sheet 8 exceeds the internal space of the trapezoidal ring 5, when the pressing sheet 8 is gradually squeezed into the trapezoidal ring 5, the trapezoidal ring 5 will be squeezed and expanded outward due to the characteristics of its elastic material. This expansion effect causes the elastic retaining rings 7 at both ends of the trapezoidal ring 5 to slide outward, thereby exerting additional pressure on the gasket 6. As the elastic retaining ring 7 moves, the gasket 6 is squeezed and generates greater pressure on the contact surface with the connecting pipe 1, thereby increasing the friction between the two. This series of interacting forces together form a self-locking mechanism, which ensures the reliability and sealing of the pipeline connection and prevents leakage under high pressure conditions.
[0026] See also Figure 4 , the pressing sheet 8 is made of elastic material, the trapezoidal area of the cross section of the protrusion 9 is larger than the trapezoidal area of the cross section of the trapezoidal ring 5, and the trapezoidal area of the cross section of the protrusion 9 is larger than the trapezoidal area of the cross section of the trapezoidal ring 5 to ensure that the pressure can be effectively transmitted to the trapezoidal ring 5 during connection, and to cause it to deform to achieve a sealing effect. A cavity is provided between the pressing sheet 8 and the annular groove 4, and the side profile of the protrusion 9 is a hexagon. The inner walls of both ends of the connecting pipe 1 are provided with flares 10, which can reduce the turbulence and resistance of the fluid when entering or leaving the connecting pipe 1, thereby reducing energy loss. This helps to improve the fluid dynamics efficiency of the entire system, and when liquid or gas flows into the pipeline, the flare 10 structure can help disperse the pressure of the fluid and reduce the pressure shock generated in the pipeline due to changes in fluid velocity. This phenomenon is also called the water hammer effect. The top of the trapezoidal ring 5 is fixedly connected to the coupling nut 2. Gaskets 6 are also fixedly installed on both sides of the elastic retaining ring 7, and the trapezoidal ring 5 and the connecting pipe 1 are sealed.
[0027] Working principle: When using copper joints for pipe connection, the threaded end 3 of the connecting pipe 1 needs to be screwed into the two pipes to be connected, and ensure that the end face of the pipe fits tightly with the gasket 6. When high-pressure gas or liquid is passed into the connecting pipe 1, the increase in internal pressure will exert an extrusion force on the annular pressing sheet 8, thereby pushing the pressing sheet 8 to be completely embedded in the internal annular groove 4. At the same time, the trapezoidal protrusion 9 on the pressing sheet 8 is also pressed into the elastic trapezoidal ring 5. Since the volume of the protrusion 9 of the pressing sheet 8 exceeds the internal space of the trapezoidal ring 5, when the pressing sheet 8 is gradually squeezed into the trapezoidal ring 5, the trapezoidal ring 5 will be squeezed and expand outward due to the characteristics of its elastic material. This expansion action causes the elastic retaining rings 7 at both ends of the trapezoidal ring 5 to slide outward, thereby exerting additional pressure on the gasket 6. As the elastic retaining ring 7 moves, the gasket 6 is squeezed and generates greater pressure on the contact surface with the connecting pipe 1, thereby increasing the friction between the two. This series of interacting forces together form a self-locking mechanism, ensuring the reliability and sealing of the pipeline connection and preventing leakage under high pressure conditions.
[0028] It should be noted that, in this article, relational terms such as first and second, etc. are only used to distinguish one entity or operation from another entity or operation, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Moreover, the terms "include", "comprise" or any other variants thereof are intended to cover non-exclusive inclusion, so that a process, method, article or device including a series of elements includes not only those elements, but also other elements not explicitly listed, or also includes elements inherent to such process, method, article or device. In the absence of further restrictions, the elements defined by the sentence "comprise a ..." do not exclude the existence of other identical elements in the process, method, article or device including the elements.
[0029] Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art 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 appended claims and their equivalents.
Claims
1. A copper joint with a solder-free connection technology, comprising a connecting pipe (1) and a connecting nut (2), wherein the connecting pipe (1) is coaxially fixedly mounted with the connecting nut (2), and threads (3) are provided on the outer wall of the connecting pipe (1) at both ends of the connecting nut (2), characterized in that: The inner ring shape of the connecting nut (2) is hexagonal, the outer wall shape of the connecting tube (1) at the position where the connecting nut (2) is fixed is hexagonal, an annular groove (4) is provided inside the connecting tube (1) at the position of the connecting nut (2), a trapezoidal ring (5) is arranged outside the annular groove (4), and the trapezoidal ring (5) has a hexagonal shape matching the connecting nut (2) when viewed from the side, the trapezoidal ring (5) is made of elastic material, elastic retaining rings (7) are fixedly installed at both ends of the trapezoidal ring (5), and the two ends of the trapezoidal ring (5) are fixed in the annular groove (4), an annular pressing sheet (8) is also arranged in the annular groove (4), and a trapezoidal protrusion (9) is arranged outside the pressing sheet (8).
2. The copper joint of the solderless connection technology according to claim 1, characterized in that: The pressing sheet (8) is made of elastic material, the trapezoidal cross-sectional area of the protrusion (9) is larger than the trapezoidal cross-sectional area of the trapezoidal ring (5), and the inner diameter of the pressing sheet (8) is smaller than the inner diameter of the connecting pipe (1).
3. The copper joint of the solderless connection technology according to claim 1, characterized in that: A cavity is provided between the pressing sheet (8) and the annular groove (4), and the protrusion (9) has a hexagonal profile when viewed from the side.
4. The copper joint of the solderless connection technology according to claim 1, characterized in that: The inner walls of both ends of the connecting pipe (1) are provided with flared openings (10).
5. The copper joint of the solderless connection technology according to claim 1, characterized in that: The top of the trapezoidal ring (5) is fixedly connected to the connecting nut (2).
6. The copper joint of the solderless connection technology according to claim 1, characterized in that: Gaskets (6) are also fixedly mounted on both sides of the elastic retaining ring (7).
7. The copper joint of the solderless connection technology according to claim 1, characterized in that: The trapezoidal ring (5) and the connecting pipe (1) are sealedly connected.