Fire-free quick connecting piece for refrigeration pipeline

Abstract

The utility model relates to the technical field of connecting pieces, in particular to a fireless quick connecting piece for a refrigeration pipeline, which comprises a brass main body, a plurality of sealing ring positioning grooves are arranged on the inner surface wall of the brass main body, a step is arranged between two sealing ring positioning grooves, and a first locking nut and a second locking nut are respectively arranged at two ends of the brass main body. Connecting threads are formed in the outer surfaces of the two ends of the brass body respectively, a first locking nut and a second locking nut are in threaded connection with the brass body through the connecting threads respectively, and the brass body, a first sealing ring, a first self-locking ring, the first locking nut, a sealing ring positioning groove and a step are matched for use, so that a seamless connection structure is achieved; the copper pipe is in flaring-free sealing connection, the self-tightening ring is self-locked to prevent retreating, the connection reliability is ensured, the installation time is shortened by more than 50% compared with a traditional mode, the flaring procedure is omitted, the installation cost of a single air conditioner is reduced, and the sealing performance of the pipeline is improved due to the arrangement of the first sealing ring and the second sealing ring in the brass body.

Description

Technical Field

[0001] This utility model relates to the field of connector technology, specifically a flameless quick connector for refrigeration pipes. Background Technology

[0002] In the development of pipe connections, methods such as welding and crimping have been developed. Welding requires the use of open flames, which places high demands on the operating environment and the operators. The crimping method involves inserting the pipe into a sleeve and then using a specialized crimping tool to press the sleeve and pipe tightly together. Once the pipes are connected by welding or crimping, they are not easy to separate.

[0003] Existing technologies, such as patent documents with publication numbers CN112303364B and CN113167415A, use thin-sheet metal locking rings to prevent pipes from falling off. However, during long-term operation of the equipment, the locking rings in these two patent documents may experience vibration, repeated pressure increases and decreases, and high and low temperatures, which can affect the lifespan of the fittings and thus the service life of the pipes. Utility Model Content

[0004] The purpose of this utility model is to provide a flameless quick-connect fitting for refrigeration pipes, in order to solve the problem of using a thin metal structure locking ring as proposed in the background art. Regarding the locking rings in the two patent documents mentioned above, during long-term operation of the equipment, vibration, repeated pressure increase and decrease, high and low temperatures, etc. will affect the life of the fittings and thus the service life of the pipe fittings.

[0005] To achieve the above objectives, this utility model provides the following technical solution:

[0006] A flameless quick-connect fitting for refrigeration pipes includes a brass body. Multiple sealing ring positioning grooves are formed on the inner surface of the brass body. A step is provided between two of the sealing ring positioning grooves. A first sealing ring, a second sealing ring, a third sealing ring, and a fourth sealing ring are fixedly connected to the multiple sealing ring positioning grooves respectively. The first and second sealing rings are positioned opposite to the third and fourth sealing rings. A first locking nut and a second locking nut are respectively provided at both ends of the brass body. Connecting threads are formed on the outer surfaces of both ends of the brass body. The first and second locking nuts are threadedly connected to the brass body through the connecting threads.

[0007] As a preferred embodiment of this utility model, the first locking nut and the second locking nut are respectively provided with dustproof sealing ring grooves and fastening inclined surfaces, and the first dustproof ring and the second dustproof ring are respectively fixedly connected in the two dustproof sealing ring grooves. The first locking nut and the second locking nut are respectively provided with a first self-locking ring and a second self-locking ring on their sides.

[0008] As a preferred embodiment of this utility model, the inner surface of the first self-locking ring and the second self-locking ring are respectively provided with anti-reverse grooves, and the outer surface of the first self-locking ring and the second self-locking ring are respectively provided with fastening reserved grooves.

[0009] As a preferred embodiment of this utility model, the first self-locking ring and the second self-locking ring extend into the fastening inclined surface, and the first self-locking ring and the second self-locking ring are respectively engaged with the first locking nut and the second locking nut.

[0010] As a preferred embodiment of this utility model, a second tube is provided on the side of the first locking nut, the second tube extends into the first locking nut, and the second tube is engaged with the second self-locking ring.

[0011] As a preferred embodiment of this utility model, a first tube is provided on the side of the second locking nut, the first tube extends into the second locking nut, and the first tube is engaged with the first self-locking ring.

[0012] As a preferred embodiment of this utility model, the first locking nut and the second locking nut are the same size, and both the first locking nut and the second locking nut are made of brass.

[0013] As a preferred embodiment of this utility model, the first sealing ring, the second sealing ring, the third sealing ring, and the fourth sealing ring are of the same size, and the first sealing ring, the second sealing ring, the third sealing ring, and the fourth sealing ring are all made of HNBR material.

[0014] Compared with the prior art, the beneficial effects of this utility model are:

[0015] 1. In this utility model, by using a brass main body, a first sealing ring, a second sealing ring, a first self-locking ring, a first locking nut, a sealing ring positioning groove, and a step in combination, a seamless connection structure is achieved. This provides a non-flaring sealing connection for copper pipes. The self-locking ring prevents slippage, ensuring connection reliability. Installation time is reduced by more than 50% compared to traditional methods. The flaring process is eliminated, reducing the installation cost per air conditioner. The first and second sealing rings inside the brass main body improve the sealing performance of the pipes, further extending the product's service life. The step separating the two sealing rings prevents interference between them, such as deformation or simultaneous contact with refrigerant.

[0016] 2. In this utility model, by setting up a brass body, a first locking nut, a second locking nut, a first self-locking ring, and a second self-locking ring in cooperation, the brass body, as the core part of the connector, ensures the stability and reliability of the connector during long-term use due to its high strength and corrosion resistance. The design of the first and second locking nuts allows the connector to be more firmly fixed to the copper pipe during installation. At the same time, the cooperation of the first and second self-locking rings realizes the self-locking and anti-retraction function, ensuring that the connector will not loosen due to vibration or external force even in harsh working environments, thereby further improving the reliability and safety of the connection. Attached Figure Description

[0017] Figure 1 This is a schematic diagram of the overall exploded structure of this utility model;

[0018] Figure 2 This is a schematic diagram of the brass main structure of this utility model;

[0019] Figure 3 This is a schematic diagram of the self-locking ring structure of this utility model;

[0020] Figure 4 This is a schematic diagram of the locking nut structure of this utility model.

[0021] In the diagram: 1. Brass body; 2. First locking nut; 3. Second locking nut; 4. First self-locking ring; 5. Second self-locking ring; 6. First sealing ring; 7. Second sealing ring; 8. Third sealing ring; 9. Fourth sealing ring; 10. First dustproof ring; 11. First pipe fitting; 12. Second dustproof ring; 13. Second pipe fitting; 14. Step; 15. Sealing ring positioning groove; 16. Fastening reserved groove; 17. Anti-reverse groove; 18. Fastening inclined surface; 19. Dustproof sealing ring groove. Detailed Implementation

[0022] The technical solutions of the present utility model will be clearly and completely described below with reference to the embodiments of the present utility model. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. All other embodiments obtained by those skilled in the art based on the embodiments of the present utility model without creative effort are within the protection scope of the present utility model.

[0023] For examples, please refer to Figures 1-4 This utility model provides a technical solution:

[0024] A flameless quick-connect fitting for refrigeration pipes includes a brass body 1. Multiple sealing ring positioning grooves 15 are formed on the inner surface of the brass body 1. A step 14 is provided between two sealing ring positioning grooves 15. A first sealing ring 6, a second sealing ring 7, a third sealing ring 8, and a fourth sealing ring 9 are fixedly connected within the multiple sealing ring positioning grooves 15, respectively. The first sealing ring 6 and the second sealing ring 7 are positioned opposite to the third sealing ring 8 and the fourth sealing ring 9. A first locking nut 2 and a second locking nut 3 are respectively provided at both ends of the brass body 1. Connecting threads are formed on the outer surfaces of both ends of the brass body 1. The first locking nut 2 and the second locking nut 3 are threadedly connected to the brass body 1 through the connecting threads. Dustproof sealing ring slots 19 and fastening bevels 18 are respectively formed within the first locking nut 2 and the second locking nut 3. A first dustproof ring 10 and a second dustproof ring 12 are fixedly connected within the two dustproof sealing ring slots 19, respectively. A first self-locking ring 4 and a second self-locking ring 5 are respectively provided on the sides of the first locking nut 2 and the second locking nut 3.

[0025] Among them, the seamless connection structure provides a sealed connection to the copper tube without flaring, and the self-tightening ring prevents slippage, ensuring connection reliability and reducing installation time by more than 50% compared to the traditional method, eliminating the need for flaring.

[0026] In this embodiment, as Figure 1 , Figure 2 , Figure 3 and Figure 4 As shown, the inner surfaces of the first self-locking ring 4 and the second self-locking ring 5 are respectively provided with anti-reverse grooves 17, and the outer surfaces of the first self-locking ring 4 and the second self-locking ring 5 are respectively provided with fastening reserved grooves 16. The first self-locking ring 4 and the second self-locking ring 5 extend into the fastening inclined surface 18, and the first self-locking ring 4 and the second self-locking ring 5 are respectively engaged with the first locking nut 2 and the second locking nut 3. A second tube 13 is provided on the side of the first locking nut 2, and the second tube 13 extends into the first locking nut 2. The second tube 13 engages with the second self-locking ring 5. The second locking nut 3 is snapped together with a first tube 11 on its side, which extends into the second locking nut 3 and snaps together with the first self-locking ring 4. The first locking nut 2 and the second locking nut 3 are the same size and are both made of brass. The first sealing ring 6, the second sealing ring 7, the third sealing ring 8 and the fourth sealing ring 9 are the same size and are all made of HNBR material.

[0027] Among them, the brass body 1, as the core part of the connector, ensures the stability and reliability of the connector during long-term use due to its high strength and corrosion resistance.

[0028] The working process of this utility model is as follows: When using the flameless quick-connect fitting for refrigeration pipes designed in this scheme, first check whether the fitting is in normal use, ensuring that all components are intact and not loose. Then, insert the first fitting 11 and the second fitting 13 into the corresponding ports of the brass body 1 respectively. By rotating the first locking nut 2 and the second locking nut 3, they will gradually tighten along the threads of the brass body 1, thereby pushing the first self-locking ring 4 and the second self-locking ring 5 into the check groove 17 respectively, realizing a stable connection of the fittings. During this process, the first sealing ring 6, the second sealing ring 7, the third sealing ring 8 and the fourth sealing ring 9 will respectively play a sealing role to prevent refrigerant leakage. At the same time, the first dustproof ring 10 and the second dustproof ring 12 can effectively prevent dust and impurities from entering the interior of the fitting, keeping it clean and working normally. The design of the fastening reserved groove 16 ensures the reliability of the connection, while the dustproof sealing ring groove 19 is used to install additional dustproof sealing rings to further enhance the dustproof effect. The entire connection process does not require the use of flames or special tools, and is fast and safe.

[0029] Although embodiments of the present invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of the present invention, the scope of which is defined by the appended claims and their equivalents.

Claims

1. A flameless quick-connect fitting for refrigeration pipes, comprising a brass body (1), characterized in that: The inner surface of the brass body (1) is provided with multiple sealing ring positioning grooves (15), and a step (14) is provided between two of the sealing ring positioning grooves (15). A first sealing ring (6), a second sealing ring (7), a third sealing ring (8) and a fourth sealing ring (9) are fixedly connected in the multiple sealing ring positioning grooves (15). The first sealing ring (6) and the second sealing ring (7) are positioned opposite to the third sealing ring (8) and the fourth sealing ring (9). A first locking nut (2) and a second locking nut (3) are provided at both ends of the brass body (1). Connecting threads are provided on the outer surfaces of both ends of the brass body (1). The first locking nut (2) and the second locking nut (3) are threadedly connected to the brass body (1) through the connecting threads.

2. The flameless quick-connect fitting for refrigeration pipes according to claim 1, characterized in that, The first locking nut (2) and the second locking nut (3) are respectively provided with a dustproof sealing ring groove (19) and a fastening inclined surface (18). The first dustproof ring (10) and the second dustproof ring (12) are respectively fixedly connected in the two dustproof sealing ring grooves (19). The first locking nut (2) and the second locking nut (3) are respectively provided with a first self-locking ring (4) and a second self-locking ring (5).

3. A flameless quick-connect fitting for refrigeration pipes according to claim 2, characterized in that, The inner surface of the first self-locking ring (4) and the second self-locking ring (5) are respectively provided with anti-reverse grooves (17), and the outer surface of the first self-locking ring (4) and the second self-locking ring (5) are respectively provided with fastening reserved grooves (16).

4. A flameless quick-connect fitting for refrigeration pipes according to claim 2, characterized in that, The first self-locking ring (4) and the second self-locking ring (5) extend into the fastening inclined surface (18) respectively, and the first self-locking ring (4) and the second self-locking ring (5) are respectively engaged with the first locking nut (2) and the second locking nut (3).

5. A flameless quick-connect fitting for refrigeration pipes according to claim 1, characterized in that, The first locking nut (2) has a second tube (13) on its side. The second tube (13) extends into the first locking nut (2) and is engaged with the second self-locking ring (5).

6. A flameless quick-connect fitting for refrigeration pipes according to claim 1, characterized in that, The second locking nut (3) has a first tube (11) on its side, the first tube (11) extends into the second locking nut (3), and the first tube (11) is engaged with the first self-locking ring (4).

7. A flameless quick-connect fitting for refrigeration pipes according to claim 1, characterized in that, The first locking nut (2) and the second locking nut (3) are the same size, and both the first locking nut (2) and the second locking nut (3) are made of brass.

8. A flameless quick-connect fitting for refrigeration pipes according to claim 1, characterized in that, The first sealing ring (6), the second sealing ring (7), the third sealing ring (8) and the fourth sealing ring (9) are the same size, and the first sealing ring (6), the second sealing ring (7), the third sealing ring (8) and the fourth sealing ring (9) are all made of HNBR material.

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