Metal sealing structure for threaded connection

Abstract

The utility model provides a metal sealing structure for threaded connection, and relates to the technical field of metal sealing structures, the metal sealing structure for threaded connection comprises a first pipeline, a second pipeline is arranged on one side of the first pipeline, a rotating block is rotatably mounted on the outer side of the first pipeline, and a conical groove is formed in the outer side of the first pipeline; the first connecting groove is formed in the inner side of the first pipeline and connected with the pipeline sealing assembly through arranged threads, and the first metal sealing ring and the second metal sealing ring are both conical, so that after the first pipeline and the second pipeline are screwed, the second metal sealing ring and the first metal sealing ring abut against each other; the outer diameter of the first connecting groove and the outer diameter of the second connecting groove are larger than the inner diameter of the first connecting block and the inner diameter of the second connecting block, so that the first metal sealing ring and the second metal sealing ring have certain displacement positions in the thermal expansion and cold contraction process of the device, and the sealing effect of the first pipeline and the second pipeline can be guaranteed.

Description

Technical Field

[0001] This utility model relates to the field of metal sealing structure technology, and in particular to a metal sealing structure for threaded connections. Background Technology

[0002] In the testing, production and maintenance equipment for oil and gas wells, the connection between parts is mainly threaded. Thread seals are mainly used to isolate the medium and pressure on both sides of the connection thread. At present, most products on the market rely on the thread itself or non-metallic materials to seal the threaded connection between parts in order to achieve the sealing of the medium and pressure on both sides of the thread.

[0003] The announcement number CN210950276U discloses a metal sealing structure for threaded connection, including a pipe body A with internal threads and a pipe body B with external threads. The pipe body A and the pipe body B are connected by the internal threads and the external threads. At least two annular grooves are provided at the mating surfaces of the pipe body A and the pipe body B, and a metal sealing ring is provided in each annular groove.

[0004] In use, the existing device achieves a sealing effect through the cooperation of the groove and the metal sealing ring. However, the protruding sealing ring can cause obstruction when two pipes connected by threads are connected, making it difficult to open the threaded pipes later. Therefore, we propose a metal sealing structure for threaded connections. Utility Model Content

[0005] In view of this, this application provides a metal sealing structure for threaded connections, which solves the above-mentioned technical problems to a certain extent.

[0006] To achieve the above objectives, the present invention adopts the following technical solution:

[0007] A metal sealing structure for threaded connections includes a first pipe, a second pipe disposed on one side of the first pipe, a rotating block rotatably mounted on the outer side of the first pipe, a threaded connection pipe sealing assembly disposed above the first pipe and the second pipe, and a pipe connection reinforcement assembly disposed above the first pipe, the second pipe and the rotating block.

[0008] The threaded connection pipe sealing assembly includes a tapered groove, a first connecting groove, a first connecting block, and a first metal sealing ring. The tapered groove is formed on the outside of the first pipe, the first connecting groove is formed on the inside of the first pipe, the first connecting block is disposed on the inside of the first connecting groove, and the first metal sealing ring is fixedly installed on one side of the first connecting block.

[0009] As a further improvement to the above solution, the threaded connection pipe sealing assembly further includes a second connecting groove, a second connecting block, and a second metal sealing ring. The second connecting groove is formed inside the second pipe, the second connecting block is disposed inside the second connecting groove, and the second metal sealing ring is fixedly installed on one side of the second connecting block.

[0010] As a further improvement to the above solution, the pipe connection reinforcement component includes a clamping block, a clamping groove, a protruding limiting block, and a guide groove. The clamping block is fixedly installed on the outside of the second pipe, the clamping groove is opened on one side of the clamping block, the protruding limiting block is fixedly installed on the bottom left and right sides of the clamping block, and the guide groove is opened on the top left and right sides of the rotating block.

[0011] As a further improvement to the above solution, the pipe connection reinforcement assembly also includes a storage groove, a spring, a locking block, and a locking slot. The storage groove is formed on the top inner wall of the locking block, the spring is fixedly installed on the top inner wall of the storage groove, the locking block is fixedly installed on the bottom of the spring, and the locking slot is formed on the top of the rotating block.

[0012] As a further improvement to the above solution, the thickness of the clamping groove is the same as the thickness of the rotating block, and the rotating block fits into the clamping groove.

[0013] As a further improvement to the above scheme, the outer diameter of the protruding limiting block is the same as the inner diameter of the guide groove, and one side of the protruding limiting block abuts against one side of the rotating block.

[0014] As a further improvement to the above solution, the thickness of the card block is the same as the thickness of the storage groove and the card slot, and the outer diameter of the card block is the same as the inner diameter of the storage groove and the card slot.

[0015] As a further improvement to the above solution, the outer diameters of the first connecting groove and the second connecting groove are larger than the inner diameters of the first connecting block and the second connecting block, and the outer diameters of the first connecting groove, the second connecting groove, the second connecting block and the first connecting block are all T-shaped.

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

[0017] (1) A metal sealing structure for threaded connection of the present invention, through the threaded connection pipe sealing component, the first metal sealing ring and the second metal sealing ring are both conical in shape, so that the second metal sealing ring and the first metal sealing ring can be pressed against each other after the first pipe and the second pipe are tightened. The outer diameter of the first connecting groove and the second connecting groove is larger than the inner diameter of the first connecting block and the second connecting block, so that the first metal sealing ring and the second metal sealing ring have a certain displacement position during the thermal expansion and contraction process, and the sealing effect of the first pipe and the second pipe can be guaranteed.

[0018] (2) A metal sealing structure for threaded connection of the present invention, through the set pipe connection reinforcement component, controls the rotating block to enter the inner side of the clamping groove on the clamping block. The protruding limiting block can clamp and limit the rotating block. When the rotating block reaches the designated position, the spring can drive the clamping block to pop out from the inner side of the receiving groove and slide into the upper part of the clamping groove. The clamping block can limit the rotating block, which can improve the connection effect of the first pipe and the second pipe and prevent the separation of the first pipe and the second pipe.

[0019] To make the above-mentioned objectives, features and advantages of this application more apparent and understandable, preferred embodiments are described below in detail with reference to the accompanying drawings. Attached Figure Description

[0020] Figure 1 This is a three-dimensional structural diagram of a metal sealing structure for threaded connections proposed in this utility model.

[0021] Figure 2 This illustration shows a schematic diagram of a three-dimensional view of a partial structure of a metal sealing structure for a threaded connection according to an embodiment of this application;

[0022] Figure 3 This diagram illustrates a three-dimensional cross-sectional view of a metal sealing structure for threaded connections according to an embodiment of this application.

[0023] Figure 4 for Figure 3 A magnified structural diagram of A in the middle;

[0024] Figure 5 A schematic diagram showing a three-dimensional view of the explosive portion structure of the first and second pipes provided according to an embodiment of this application is shown.

[0025] Figure 6 for Figure 5 A magnified structural diagram of B in the diagram;

[0026] Figure 7 This diagram shows a three-dimensional cross-sectional view of a metal sealing structure for threaded connections provided according to an embodiment of this application.

[0027] Figure label:

[0028] 1. Threaded pipe sealing assembly; 2. Pipe connection reinforcement assembly; 3. First pipe; 4. Second pipe; 5. Rotating block;

[0029] 11. Conical groove; 12. First connecting groove; 13. First connecting block; 14. First metal sealing ring; 15. Second connecting groove; 16. Second connecting block; 17. Second metal sealing ring;

[0030] 21. Clamping block; 22. Clamping groove; 23. Protruding limiting block; 24. Guide groove; 25. Storage groove; 26. Spring; 27. Clamping block; 28. Clamping slot. Detailed Implementation

[0031] To further understand the invention content, features and effects of this utility model, the following embodiments are provided, and detailed descriptions are given below in conjunction with the accompanying drawings;

[0032] The structure of this utility model will now be described in detail with reference to the accompanying drawings.

[0033] refer to Figure 1-7 A metal sealing structure for threaded connections includes a first pipe 3, a second pipe 4 disposed on one side of the first pipe 3, a rotating block 5 rotatably mounted on the outer side of the first pipe 3, a threaded connection pipe sealing assembly 1 disposed above the first pipe 3 and the second pipe 4, and a pipe connection reinforcement assembly 2 disposed above the first pipe 3, the second pipe 4 and the rotating block 5.

[0034] The threaded connection pipe sealing assembly 1 includes a tapered groove 11, a first connecting groove 12, a first connecting block 13, and a first metal sealing ring 14. The tapered groove 11 is opened on the outside of the first pipe 3, the first connecting groove 12 is opened on the inside of the first pipe 3, the first connecting block 13 is disposed on the inside of the first connecting groove 12, and the first metal sealing ring 14 is fixedly installed on one side of the first connecting block 13.

[0035] In this embodiment, the threaded connection pipe sealing assembly 1 further includes a second connecting groove 15, a second connecting block 16, and a second metal sealing ring 17. The second connecting groove 15 is opened inside the second pipe 4, the second connecting block 16 is disposed inside the second connecting groove 15, and the second metal sealing ring 17 is fixedly installed on one side of the second connecting block 16.

[0036] In this embodiment, the pipe connection reinforcement component 2 includes a clamping block 21, a clamping groove 22, a protruding limiting block 23, and a guide groove 24. The clamping block 21 is fixedly installed on the outside of the second pipe 4, the clamping groove 22 is opened on one side of the clamping block 21, the protruding limiting block 23 is fixedly installed on the bottom left and right sides of the clamping block 21, and the guide groove 24 is opened on the top left and right sides of the rotating block 5.

[0037] In this embodiment, the pipe connection reinforcement component 2 also includes a receiving groove 25, a spring 26, a locking block 27, and a locking slot 28. The receiving groove 25 is formed on the top inner wall of the locking block 21. The spring 26 is fixedly installed on the top inner wall of the receiving groove 25. The locking block 27 is fixedly installed on the bottom of the spring 26. The locking slot 28 is formed on the top of the rotating block 5. When the rotating block 5 is operated to enter the inner side of the locking slot 22 on the locking block 21, the protruding limiting block 23 can lock and limit the rotating block 5. When the rotating block 5 reaches the designated position, the spring 26 can drive the locking block 27 to pop out from the inner side of the receiving groove 25 and slide into the upper part of the locking slot 28. The locking block 27 can limit the rotating block 5, which can improve the connection effect of the first pipe 3 and the second pipe 4 and prevent the first pipe 3 and the second pipe 4 from separating.

[0038] In this embodiment, the thickness of the clamping groove 22 is the same as the thickness of the rotating block 5, and the rotating block 5 fits into the clamping groove 22; the clamping groove 22 and the rotating block 5 are the same thickness, which allows one side of the protruding limiting block 23 to abut against one side of the rotating block 5.

[0039] In this embodiment, the outer diameter of the protruding limiting block 23 is the same as the inner diameter of the guide groove 24, and one side of the protruding limiting block 23 abuts against one side of the rotating block 5; the guide groove facilitates the rotating block 5 to quickly enter the inner side of the clamping block 21, and rotating the rotating block 5 can realize the protruding limiting block 23 to limit and clamp the rotating block 5.

[0040] In this embodiment, the thickness of the card block 27 is the same as the thickness of the storage groove 25 and the card slot 28, and the outer diameter of the card block 27 is the same as the inner diameter of the storage groove 25 and the card slot 28; the card slot 28 facilitates the fixing of the rotating block 5 after the card block 27 pops out, so that the first pipe 3 and the second pipe 4 can be connected more tightly.

[0041] In this embodiment, the outer diameters of the first connecting groove 12 and the second connecting groove 15 are larger than the inner diameters of the first connecting block 13 and the second connecting block 16. The outer diameters of the first connecting groove 12, the second connecting groove 15, the second connecting block 16, and the first connecting block 13 are all T-shaped. The first metal sealing ring 14 and the second metal sealing ring 17 are both conical in shape, which allows the second metal sealing ring 17 and the first metal sealing ring 14 to abut against each other after the first pipe 3 and the second pipe 4 are tightened. The outer diameters of the first connecting groove 12 and the second connecting groove 15 are larger than the inner diameters of the first connecting block 13 and the second connecting block 16, which allows the first metal sealing ring 14 and the second metal sealing ring 17 to have a certain displacement position during the thermal expansion and contraction process, and can ensure the sealing effect of the first pipe 3 and the second pipe 4.

[0042] Specifically, the first pipe 3 is screwed into the inner side of the second pipe 4 by engaging the external thread on its outer side with the internal thread on its inner side. A first connecting groove 12 and a second connecting groove 15 are provided above the first pipe 3 and the second pipe 4 to facilitate the corresponding installation of the first connecting block 13, the first metal sealing ring 14, the second connecting block 16, and the second metal sealing ring 17. Both the first metal sealing ring 14 and the second metal sealing ring 17 are conical in shape, allowing them to abut against each other after the first pipe 3 and the second pipe 4 are tightened. The outer diameter of the first connecting groove 12 and the second connecting groove 15 is larger than the inner diameter of the first connecting block 13 and the second connecting block 16, allowing the first metal sealing ring 17 to abut against the second metal sealing ring 14 during thermal expansion and contraction. 4. The second metal sealing ring 17 has a certain displacement position, which can ensure the sealing effect of the first pipe 3 and the second pipe 4. The rotating block 5 is operated to enter the inner side of the clamping groove 22 on the clamping block 21. The protruding limiting block 23 can clamp and limit the rotating block 5. When the rotating block 5 reaches the designated position, the spring 26 can drive the clamping block 27 to pop out from the inner side of the storage groove 25 and slide into the upper part of the clamping groove 28. The clamping block 27 can limit the rotating block 5, which can improve the connection effect of the first pipe 3 and the second pipe 4 and prevent the first pipe 3 and the second pipe 4 from separating. When disassembly is required, the clamping block 27 can be pressed into the inner side of the storage groove 25, and the rotating block 5 can be rotated to make the protruding limiting block 23 and the guide groove 24 fit together. At this time, it is convenient for the rotating block 5 and the clamping block 21 to separate.

[0043] It should be noted that although embodiments of the present invention have been shown and described, those skilled in the art will understand 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 metal sealing structure for threaded connections, characterized in that, include: A first pipe (3) is provided on one side of the first pipe (3) and a second pipe (4) is provided on one side of the first pipe (3). A rotating block (5) is rotatably installed on the outside of the first pipe (3). A threaded connection pipe sealing assembly (1) is provided above the first pipe (3) and the second pipe (4). A pipe connection reinforcement assembly (2) is provided above the first pipe (3), the second pipe (4) and the rotating block (5). The threaded connection pipe sealing assembly (1) includes a tapered groove (11), a first connecting groove (12), a first connecting block (13), and a first metal sealing ring (14). The tapered groove (11) is opened on the outside of the first pipe (3), the first connecting groove (12) is opened on the inside of the first pipe (3), the first connecting block (13) is disposed on the inside of the first connecting groove (12), and the first metal sealing ring (14) is fixedly installed on one side of the first connecting block (13).

2. The metal sealing structure for threaded connections according to claim 1, characterized in that, The threaded connection pipe sealing assembly (1) further includes a second connecting groove (15), a second connecting block (16), and a second metal sealing ring (17). The second connecting groove (15) is opened inside the second pipe (4), the second connecting block (16) is disposed inside the second connecting groove (15), and the second metal sealing ring (17) is fixedly installed on one side of the second connecting block (16).

3. A metal sealing structure for threaded connections according to claim 1, characterized in that, The pipe connection reinforcement component (2) includes a clamping block (21), a clamping groove (22), a protruding limiting block (23), and a guide groove (24). The clamping block (21) is fixedly installed on the outside of the second pipe (4). The clamping groove (22) is opened on one side of the clamping block (21). The protruding limiting block (23) is fixedly installed on the bottom left and right sides of the clamping block (21). The guide groove (24) is opened on the top left and right sides of the rotating block (5).

4. A metal sealing structure for threaded connections according to claim 1, characterized in that, The pipe connection reinforcement assembly (2) also includes a storage groove (25), a spring (26), a locking block (27), and a locking slot (28). The storage groove (25) is opened on the top inner wall of the locking block (21). The spring (26) is fixedly installed on the top inner wall of the storage groove (5). The locking block (27) is fixedly installed on the bottom of the spring (26). The locking slot (28) is opened on the top of the rotating block (5).

5. A metal sealing structure for threaded connections according to claim 3, characterized in that, The thickness of the clamping groove (22) is the same as the thickness of the rotating block (5), and the rotating block (5) fits into the clamping groove (22).

6. A metal sealing structure for threaded connections according to claim 3, characterized in that, The outer diameter of the protruding limiting block (23) is the same as the inner diameter of the guide groove (24), and one side of the protruding limiting block (23) abuts against one side of the rotating block (5).

7. A metal sealing structure for threaded connections according to claim 4, characterized in that, The thickness of the card block (27) is the same as the thickness of the storage groove (25) and the card slot (28), and the outer diameter of the card block (27) is the same as the inner diameter of the storage groove (25) and the card slot (28).

8. A metal sealing structure for threaded connections according to claim 1, characterized in that, The outer diameters of the first connecting groove (12) and the second connecting groove (15) are larger than the inner diameters of the first connecting block (13) and the second connecting block (16). The outer diameters of the first connecting groove (12), the second connecting groove (15), the second connecting block (16) and the first connecting block (13) are all T-shaped.

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