Double-non-return-ring fireless connecting pipe fitting structure

Abstract

The utility model relates to the technical field of connecting pipe fitting structures, in particular to a double-non-return-ring fireless connecting pipe fitting structure which comprises a connecting piece body, the inner surface wall of the connecting piece body is provided with a sealing internal thread and a first step, and the side face of a fastening nut is provided with a third step. The outer surface of the fastening nut is provided with a sealing external thread and a second step, the fastening nut extends into the connecting piece body, the connecting piece body, the clamping spring and the fastening nut are used in cooperation, and the first non-return ring and the second non-return ring are arranged at the two ends of the connecting piece body respectively. The reinforcing ring is arranged between the first non-return ring and the second non-return ring, the connecting strength is enhanced, the situation of metal fatigue fracture is avoided, the first non-return ring and the second non-return ring can be more tightly attached to the connecting piece body through the clamping spring, the connecting stability is further improved, and the fastening nut is arranged, so that the connecting piece is more convenient to use. Therefore, fastening and adjustment of pipe fitting connection are facilitated, and the whole connection process is simpler, more convenient and faster.

Description

Technical Field

[0001] This utility model relates to the technical field of connecting pipe structure, specifically a double check ring fireless connecting pipe structure. Background Technology

[0002] A connecting pipe structure is an assembly used to connect equipment pipelines. It typically consists of a stainless steel pipe and a copper sleeve. The stainless steel pipe in this structure includes a main body and a connecting part. The outer diameter of the connecting part is smaller than the outer diameter of the main body. The copper sleeve is fitted on the outside of the connecting part, and its outer diameter is smaller than or equal to the outer diameter of the main body of the stainless steel pipe. In this way, the connection between the stainless steel pipe and the equipment pipeline can be achieved without changing the equipment pipeline design.

[0003] However, traditional connectors still have certain shortcomings in use:

[0004] 1. Currently, pipeline connections are mainly made by welding or threading, but these two connection processes have limitations in terms of personnel, tools, and construction environment.

[0005] 2. For example, although patent CN113167415A can overcome the limitations of tools and personnel, the check ring used to prevent it from falling off uses a thin metal sheet structure. When subjected to 250,000 fatigue tests, metal fatigue fracture will occur, which will greatly affect the service life of the product. Utility Model Content

[0006] The purpose of this utility model is to provide a double check ring fireless connection pipe fitting structure to solve the problem mentioned in the background art that the current pipe connection is basically adopted by welding or threaded connection. These two connection processes have limitations in terms of personnel, tools, and construction environment. Although the limitations of tools and personnel can be overcome, the check ring used to prevent detachment is made of thin metal sheet structure. When the fatigue test is carried out for 250,000 cycles, metal fatigue fracture will occur, which will greatly affect the service life of the product.

[0007] To achieve the above objectives, this utility model provides the following technical solution:

[0008] A double check ring fireless connection pipe fitting structure includes a connector body. The inner surface of the connector body is provided with a sealing internal thread and a first step. The connector body is provided with a first check ring, a reinforcing ring, a second check ring, and a retaining ring. The reinforcing ring is located between the first and second check rings. The retaining ring is located on the side of the second check ring. A fastening nut is provided on the side of the connector body. The side of the fastening nut is provided with a third step. The outer surface of the fastening nut is provided with a sealing external thread and a second step. The fastening nut extends into the connector body. The fastening nut and the connector body are threadedly connected by the sealing external thread and the sealing internal thread.

[0009] As a preferred embodiment of this utility model, the side of the snap ring extends into the third step, a first sealing ring is fixedly connected in the second step, and the inner surface of the fastening nut is provided with two or more sealing ring positioning grooves, and a second sealing ring and a third sealing ring are fixedly connected in the multiple sealing ring positioning grooves respectively.

[0010] As a preferred embodiment of this utility model, a cavity is formed between the first step and the second step, and the main body of the connector is made of brass.

[0011] As a preferred embodiment of this utility model, the inner wall of the retaining ring is fixedly connected with a retaining ring tip, a retaining ring inclined surface, and a retaining ring curved surface, wherein the retaining ring curved surface is composed of a first retaining ring curved surface, a second retaining ring curved surface, and a third retaining ring curved surface.

[0012] As a preferred embodiment of this utility model, the second sealing ring and the third sealing ring are the same size, and both the second sealing ring and the third sealing ring are made of rubber.

[0013] As a preferred embodiment of this utility model, both the first check ring and the second check ring are reverse toothed metal sheets, and both the first check ring and the second check ring are made of stainless steel.

[0014] As a preferred embodiment of this utility model, both the reinforcing ring and the retaining spring are made of brass, and two fastening nuts are provided, with the two fastening nuts located at both ends of the main body of the connector.

[0015] As a preferred embodiment of this utility model, the first sealing ring is made of the same material as the second and third sealing rings, and the diameter of the first sealing ring is larger than that of the second and third sealing rings.

[0016] Compared with the prior art, the beneficial effects of this utility model are:

[0017] 1. In this utility model, by using the connector body, first check ring, reinforcing ring, second check ring, snap ring, and fastening nut in combination, a fireless connection of pipe fittings is achieved, and the stability and durability of the connection are enhanced. The connector body serves as the foundation for the pipe fitting connection. The first and second check rings are respectively set at both ends of the connector body, effectively preventing the pipe fittings from falling off. The reinforcing ring is set between the first and second check rings, enhancing the strength of the connection and avoiding metal fatigue fracture. The snap ring allows the first and second check rings to fit more tightly against the connector body, further improving the stability of the connection. The fastening nut facilitates the tightening and adjustment of the pipe fitting connection, making the entire connection process simpler and faster.

[0018] 2. In this utility model, the sealing performance of the pipe fitting connection is improved by the combined use of the snap ring, the sealing external thread, the sealing ring positioning groove, the snap ring bevel, the snap ring curved surface, and the snap ring tip. The sealing external thread matches the sealing internal thread inside the connector body, ensuring a tight connection between the pipe fitting and the connector body. The sealing ring positioning groove is set on the inner wall of the snap ring for installing the sealing ring, enhancing the sealing effect at the pipe fitting connection. The snap ring bevel and the snap ring curved surface are designed on the snap ring, making it easier for the snap ring to slide into place during installation. At the same time, the snap ring tip can be firmly inserted into the reserved hole on the pipe fitting to prevent the snap ring from falling off, further ensuring the stability and sealing of the pipe fitting connection. Attached Figure Description

[0019] Figure 1 This is a schematic diagram of the overall exploded structure of this utility model;

[0020] Figure 2 This is a schematic diagram of the main structure of the connector of this utility model;

[0021] Figure 3 This is a schematic diagram of the fastening nut structure of this utility model;

[0022] Figure 4 This is a schematic diagram of the side structure of the connector body of this utility model;

[0023] Figure 5 This is a schematic diagram of the snap ring structure of this utility model.

[0024] In the diagram: 1. Connector body; 2. First check ring; 3. Reinforcing ring; 4. Second check ring; 5. Snap ring; 6. First sealing ring; 7. Fastening nut; 8. Second sealing ring; 9. Third sealing ring; 10. Sealing internal thread; 11. First step; 12. Second step; 13. Third step; 14. Sealing external thread; 15. Sealing ring positioning groove; 16. Cavity; 17. Snap ring inclined surface; 18. Snap ring curved surface; 19. Snap ring tip. Detailed Implementation

[0025] 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.

[0026] For examples, please refer to Figures 1-5 This utility model provides a technical solution:

[0027] A double check ring fireless connection pipe fitting structure includes a connector body 1. The inner surface of the connector body 1 is respectively provided with sealing internal threads 10 and a first step 11. The connector body 1 is respectively provided with a first check ring 2, a reinforcing ring 3, a second check ring 4, and a retaining spring 5. The reinforcing ring 3 is located between the first check ring 2 and the second check ring 4. The retaining spring 5 is located on the side of the second check ring 4. A fastening nut 7 is provided on the side of the connector body 1. The side of the fastening nut 7 is provided with a third step 13. The outer surface of the fastening nut 7 is respectively... The fastening nut 7 extends into the body 1 of the connector and is threaded together with the external sealing thread 14 and the internal sealing thread 10. The side of the snap ring 5 extends into the third step 13. The first sealing ring 6 is fixedly connected in the second step 12. The inner surface of the fastening nut 7 has two or more sealing ring positioning grooves 15. The second sealing ring (8) and the third sealing ring 9 are fixedly connected in the multiple sealing ring positioning grooves 15 respectively.

[0028] The first sealing ring 6 is made of the same material as the second sealing ring 8 and the third sealing ring 9, and the diameter of the first sealing ring 6 is larger than that of the second sealing ring 8 and the third sealing ring 9.

[0029] In this embodiment, as Figure 1 , Figure 2 , Figure 3 , Figure 4 and Figure 5As shown, a cavity 16 is formed between the first step 11 and the second step 12. The main body 1 of the connector is made of brass. The inner wall of the retaining spring 5 is fixedly connected with the retaining spring tip 19, the retaining spring inclined surface 17 and the retaining spring curved surface 18. The retaining spring curved surface 18 is composed of a first retaining spring curved surface, a second retaining spring curved surface and a third retaining spring curved surface. The second sealing ring 8 and the third sealing ring 9 are the same size and are both made of rubber. The first check ring 2 and the second check ring 4 are both reverse toothed metal sheets and are both made of stainless steel. The reinforcing ring 3 and the retaining spring 5 are both made of brass. There are two fastening nuts 7, which are located at both ends of the main body 1 of the connector. The first sealing ring 6 is made of the same material as the second sealing ring 8 and the third sealing ring 9. The diameter of the first sealing ring 6 is larger than that of the second sealing ring 8 and the third sealing ring 9.

[0030] Among them, the first sealing ring 6, the second sealing ring 8 and the third sealing ring 9 work together to seal, effectively preventing media leakage and ensuring the normal operation of the pipeline.

[0031] The working process of this utility model is as follows: When using the double check ring flameless connection pipe fitting structure designed in this scheme, first check whether the connection structure is in normal use, ensuring that all components are installed correctly and without loosening or damage. Then, connect the main body 1 of the connector to the pipe to be connected, ensuring that the sealing internal thread 10 and the sealing external thread 14 can fit tightly. Under the action of the first check ring 2 and the second check ring 4, the backflow of the medium in the pipe can be effectively prevented, improving the stability and safety of the connection. At the same time, through the reinforcement effect of the reinforcing ring 3, the main body of the connector has stronger pressure resistance and can withstand greater pipe pressure. Under the action of the fastening nut 7, the main body of the connector is tightly fixed to the pipe, ensuring that the connection will not loosen due to medium pressure. During use, the first sealing ring 6, the second sealing ring 8 and the third sealing ring 9 work together to seal, effectively preventing medium leakage and ensuring the normal operation of the pipeline. When it is necessary to disassemble or replace the connector, simply loosen the fastening nut 7 to easily disassemble the connector without the need for flames or other tools, greatly improving work efficiency and safety.

[0032] 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 double back check ring fire-free connecting pipe fitting structure comprising a connecting piece main body (1), characterized in that: The inner wall of the connecting piece body (1) is respectively provided with a sealing inner thread (10) and a first step (11), the connecting piece body (1) is respectively provided with a first non-return ring (2), a reinforcing ring (3), a second non-return ring (4) and a snap spring (5), the reinforcing ring (3) is located between the first non-return ring (2) and the second non-return ring (4), the snap spring (5) is located on the side of the second non-return ring (4), the side of the connecting piece body (1) is provided with a fastening nut (7), the side of the fastening nut (7) is provided with a third step (13), the outer surface of the fastening nut (7) is respectively provided with a sealing outer thread (14) and a second step (12), the fastening nut (7) extends into the connecting piece body (1), and the fastening nut (7) and the connecting piece body (1) are threadedly connected through the sealing outer thread (14) and the sealing inner thread (10).

2. A dual reverse collar fire-free coupling pipe structure according to claim 1, characterized in that, The side of the snap spring (5) extends into the third step (13), the second step (12) is fixedly connected with a first sealing ring (6), and the inner wall of the fastening nut (7) is provided with two or more sealing ring positioning grooves (15), and the sealing ring positioning grooves (15) are respectively fixedly connected with a second sealing ring (8) and a third sealing ring (9).

3. A dual reverse collar fire-free coupling pipe structure according to claim 1, characterized in that, The first step (11) and the second step (12) form a cavity (16), and the material of the connecting piece body (1) is brass.

4. A dual reverse collar fire-free coupling pipe structure according to claim 1, wherein, The inner wall of the snap spring (5) is fixedly connected with a snap spring tip (19), a snap spring inclined surface (17) and a snap spring curved surface (18), and the snap spring curved surface (18) is composed of a first section snap spring curved surface, a second section snap spring curved surface and a third section snap spring curved surface.

5. A dual reverse collar fire-free coupling pipe structure according to claim 2, wherein, The second sealing ring (8) and the third sealing ring (9) are of the same size, and the materials of the second sealing ring (8) and the third sealing ring (9) are rubber.

6. A dual reverse collar fire-free coupling pipe structure according to claim 1, wherein, The first non-return ring (2) and the second non-return ring (4) are both inverted tooth-shaped metal sheets, and the materials of the first non-return ring (2) and the second non-return ring (4) are stainless steel.

7. A dual reverse collar fire-free coupling pipe structure as claimed in claim 1, wherein, The materials of the reinforcing ring (3) and the snap spring (5) are both brass, and the fastening nut (7) is provided with two, and the two fastening nuts (7) are respectively located at the two ends of the connecting piece body (1).

8. A dual reverse collar fire-free coupling pipe structure according to claim 2, wherein, The material of the first sealing ring (6) is the same as that of the second sealing ring (8) and the third sealing ring (9), and the caliber size of the first sealing ring (6) is larger than that of the second sealing ring (8) and the third sealing ring (9).

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