Air-tight seal threaded connection structure

Abstract

The utility model discloses an air-tight seal threaded connection structure, which relates to the technical field of connection structures and comprises a connection male head, a connection female head is arranged on the left side of the connection male head, and a multi-seal sealing structure is arranged between the connection male head and the connection female head. According to the air-tight threaded connection structure, the first sealing ring, the first-stage extension head, the second sealing ring, the second-stage extension head, the third sealing ring and the fourth sealing ring are arranged, and when the air-tight threaded connection structure is used, the first-stage extension head and the second-stage extension head of the connection male head are inserted into the first-stage connection cavity and the second-stage connection cavity of the connection female head and are locked through threads; the first sealing ring, the second sealing ring, the third sealing ring and the fourth sealing ring abut against each other, double threads are matched with the three sealing rings, the sealing performance is higher, the sealing performance is not affected when a single sealing ring is damaged, the function of preventing leakage through multiple sealing is achieved, and the problem that the device does not have the function of preventing leakage through multiple sealing is solved.

Description

Technical Field

[0001] This utility model relates to the field of connection structure technology, specifically to an airtight threaded connection structure. Background Technology

[0002] The gas-tight threaded connection structure is a common connection method for oil pipes and gas pipes. By locking the thread with the sealing ring, a high degree of sealing at the connection position can be achieved.

[0003] In current oil and gas pipelines, the gas-tight threaded connection structure is mostly similar in overall construction. The connection is divided into two parts: a male end and a female end. The external thread of the male end and the internal thread of the female end mesh with each other, and there is a sealing ring between them. As the male and female threads are tightened, the sealing ring is also compressed simultaneously to form a seal. In actual use, there are some functional deficiencies and room for improvement. For example, the connection between the male and female ends usually uses a set of threads, and the sealing ring is mostly a single set. Once the sealing ring ages and cracks, the possibility of leakage is relatively high, and it does not have the function of multiple seals to prevent leakage.

[0004] Now, a novel gas-tight threaded connection structure is proposed to solve the above problems. Utility Model Content

[0005] The purpose of this utility model is to provide an airtight threaded connection structure to solve the problem mentioned in the background art of not having the function of multiple seals to prevent leakage.

[0006] To achieve the above objectives, this utility model provides the following technical solution: an airtight threaded connection structure, including a male connector, a female connector on the left side of the male connector, and a multi-layer sealing structure between the male connector and the female connector.

[0007] The sealing structure includes a primary extension head, which is fixedly connected to the left side of the male connector. A secondary extension head is fixedly connected to the left side of the primary extension head. A first sealing ring is bonded to the outer periphery of the left side of the male connector, a second sealing ring is bonded to the outer periphery of the left side of the primary extension head, and a third sealing ring is bonded to the left side of the secondary extension head. A primary connecting cavity is provided inside the right side of the female connector, and a secondary connecting cavity is provided to the left side of the primary connecting cavity. A first annular groove is formed on the left side inside the secondary connecting cavity, a second annular groove is formed on the left side inside the primary connecting cavity, and a third annular groove is formed on the outer periphery of the right side of the female connector. A fourth sealing ring is bonded to the interior of each of the first, second, and third annular grooves.

[0008] As a further technical solution of this utility model, the outer surfaces of the first-stage extension head and the second-stage extension head are respectively threaded, and the inner surfaces of the first-stage connecting cavity and the second-stage connecting cavity are respectively threaded, and the outer threads of the first-stage extension head and the second-stage extension head respectively match the inner threads of the first-stage connecting cavity and the second-stage connecting cavity.

[0009] As a further technical solution of this utility model, the outer diameters of the male connector and the female connector are the same, and the horizontal center lines of the male connector and the female connector coincide.

[0010] As a further technical solution of this utility model, the positional dimensions of the first sealing ring, the second sealing ring, and the third sealing ring correspond one-to-one with the positional dimensions of the third annular groove, the second annular groove, and the first annular groove, and the left sides of the first sealing ring, the second sealing ring, and the third sealing ring are respectively fitted to the right side of the fourth sealing ring.

[0011] As a further technical solution of this utility model, a first flange is fixedly connected to the outside of the female connector, and a second flange is fixedly connected to the outside of the male connector. The first flange and the second flange are respectively provided with four sets of flange eyes. Two sets of connecting bolts are inserted laterally between the first flange and the second flange. Anti-loosening nuts are sleeved on the outside of the connecting bolts. The first flange and the second flange have the same shape and size. The connecting bolts pass through the flange eyes and extend to the outside.

[0012] As a further technical solution of this utility model, an internally threaded connecting tube is sleeved on the left side of the male connector. The male and female connectors are respectively threaded on their exteriors, and the external threads of the male and female connectors match the internal threads of the internally threaded connecting tube.

[0013] Compared with the prior art, the beneficial effects of this utility model are: the gas-tight threaded connection structure not only realizes the function of multiple seals to prevent leakage, but also realizes the function of preventing the male and female heads from rotating, and also realizes the function of enhancing the tightness of the connection;

[0014] (1) By setting a first sealing ring, a first-stage extension head, a second sealing ring, a second-stage extension head, a third sealing ring, a first-stage connecting cavity, a second-stage connecting cavity, a first annular groove, a second annular groove, a third annular groove and a fourth sealing ring, when in use, the male connector and the female connector are respectively installed on the pipe port to be connected, the male connector and the female connector are aligned, the first-stage extension head and the second-stage extension head of the male connector are inserted into the first-stage connecting cavity and the second-stage connecting cavity of the female connector, and locked by threads, the first sealing ring, the second sealing ring and the third sealing ring are respectively inserted into the third annular groove, the second annular groove and the first annular groove, and are pressed against the fourth sealing ring. The double threads cooperate with the three sealing rings, the sealing performance is stronger, and the damage of a single sealing ring does not affect the sealing performance, thus realizing the function of multiple sealing to prevent leakage;

[0015] (2) By setting a first flange, a second flange, connecting bolts, anti-loosening nuts and flange eyes, when in use, as the connecting male and connecting female threads are tightened, the connecting bolts are passed through the flange eyes on the first flange and the second flange, and the anti-loosening nuts are screwed on to lock them. The two sets of connecting bolts lock the first flange and the second flange, so that the angle of the connecting male and connecting female is fixed and will not rotate or loosen, thus realizing the function of preventing the male and female heads from rotating.

[0016] (3) By providing a male connector, a female connector and an internal threaded connecting pipe, when in use, as the threads of the male connector and the female connector are locked, the internal threaded connecting pipe on the male connector is rotated so that it travels along the threads on the outside of the female connector until it abuts against the first flange. The internal threaded connecting pipe can increase the tightness of the connection between the male connector and the female connector, increase the tensile strength, and realize the function of enhancing the tightness of the connection. Attached Figure Description

[0017] Figure 1 This is a front view cross-sectional structural diagram of the present invention;

[0018] Figure 2 This is a front view structural diagram of the male and female connectors of this utility model in their connected state.

[0019] Figure 3 For the present utility model Figure 1 Enlarged cross-sectional view of a portion of point A in the middle section;

[0020] Figure 4 This is a schematic diagram of the right side of the connector of this utility model.

[0021] In the diagram: 1. Male connector; 2. First sealing ring; 3. Primary extension head; 4. Second sealing ring; 5. Secondary extension head; 6. Third sealing ring; 7. Primary connecting cavity; 8. Secondary connecting cavity; 9. First annular groove; 10. Second annular groove; 11. Third annular groove; 12. Fourth sealing ring; 13. Female connector; 14. First flange; 15. Second flange; 16. Connecting bolt; 17. Anti-loosening nut; 18. Flange eye; 19. Internally threaded connecting pipe. Detailed Implementation

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

[0023] Example: Please refer to Figure 1-4 A gas-tight threaded connection structure includes a male connector 1, a female connector 13 is provided on the left side of the male connector 1, and a multi-seal sealing structure is provided between the male connector 1 and the female connector 13.

[0024] Please see Figure 1-4 A gas-tight threaded connection structure further includes a sealing structure, which includes a primary extension head 3, which is fixedly connected to the left side of the male connector 1. A secondary extension head 5 is fixedly connected to the left side of the primary extension head 3. A first sealing ring 2 is bonded to the outer periphery of the left side of the male connector 1. A second sealing ring 4 is bonded to the outer periphery of the left side of the primary extension head 3. A third sealing ring 6 is bonded to the left side of the secondary extension head 5. A primary connecting cavity 7 is provided inside the right side of the female connector 13. A secondary connecting cavity 8 is provided to the left side of the primary connecting cavity 7. A first annular groove 9 is provided inside the left side of the secondary connecting cavity 8. A second annular groove 10 is provided inside the left side of the primary connecting cavity 7. A third annular groove 11 is provided to the outer periphery of the right side of the female connector 13. A fourth sealing ring 12 is bonded to the interior of the first annular groove 9, the second annular groove 10, and the third annular groove 11, respectively.

[0025] The external surfaces of the primary extension head 3 and the secondary extension head 5 are threaded, and the internal surfaces of the primary connecting cavity 7 and the secondary connecting cavity 8 are threaded. The external threads of the primary extension head 3 and the secondary extension head 5 match the internal threads of the primary connecting cavity 7 and the secondary connecting cavity 8, respectively. The outer diameters of the male connector 1 and the female connector 13 are the same, and their horizontal center lines coincide. The positions and dimensions of the first sealing ring 2, the second sealing ring 4, and the third sealing ring 6 correspond one-to-one with the positions and dimensions of the third annular groove 11, the second annular groove 10, and the first annular groove 9. The left sides of the first sealing ring 2, the second sealing ring 4, and the third sealing ring 6 are respectively fitted to the right side of the fourth sealing ring 12. Multiple sealing combinations and multiple sets of threaded locking result in better sealing performance.

[0026] Specifically, such as Figure 1 and Figure 2 As shown, the first-stage extension head 3 and the second-stage extension head 5 of the male connector 1 are inserted into the first-stage connecting cavity 7 and the second-stage connecting cavity 8 of the female connector 13 and locked by threads. The first sealing ring 2, the second sealing ring 4, and the third sealing ring 6 are respectively inserted into the third annular groove 11, the second annular groove 10, and the first annular groove 9, and abut against the fourth sealing ring 12. The double threaded cooperation with three sealing rings provides stronger sealing performance, and the damage to a single sealing ring does not affect the sealing performance.

[0027] The female connector 13 is externally fixedly connected to a first flange 14, and the male connector 1 is externally fixedly connected to a second flange 15. The first flange 14 and the second flange 15 are respectively provided with four sets of flange eyes 18. Two sets of connecting bolts 16 are horizontally inserted between the first flange 14 and the second flange 15. Anti-loosening nuts 17 are sleeved on the outside of the connecting bolts 16. The first flange 14 and the second flange 15 have the same shape and size. The connecting bolts 16 pass through the flange eyes 18 and extend to the outside to prevent the connector from rotating and loosening.

[0028] Specifically, such as Figure 2 and Figure 4 As shown, the connecting bolts 16 are passed through the flange holes 18 on the first flange 14 and the second flange 15, and the anti-loosening nuts 17 are screwed on to lock them. The two sets of connecting bolts 16 lock the first flange 14 and the second flange 15, so that the angle of the connecting male head 1 and the connecting female head 13 is fixed and will not rotate or loosen.

[0029] A threaded connecting tube 19 is fitted onto the left side of the male connector 1. Threads are machined on the outside of both the male connector 1 and the female connector 13. The threads on the outside of the male connector 1 and the female connector 13 match the threads inside the threaded connecting tube 19, increasing the tightness of the connection between the male and female connectors.

[0030] Specifically, such as Figure 1 and Figure 2As shown, rotating the internally threaded connecting tube 19 on the male connector 1 allows it to travel along the external thread of the female connector 13 until it abuts against the first flange 14. The internally threaded connecting tube 19 can increase the tightness of the connection between the male connector 1 and the female connector 13 and increase the tensile strength.

[0031] Working Principle: In use, the male connector 1 and female connector 13 are first installed on the pipe ports to be connected, aligned. The first-stage extension head 3 and the second-stage extension head 5 of the male connector 1 are inserted into the first-stage connecting cavity 7 and the second-stage connecting cavity 8 of the female connector 13, and tightened by threads. The first sealing ring 2, the second sealing ring 4, and the third sealing ring 6 are correspondingly engaged in the third annular groove 11, the second annular groove 10, and the first annular groove 9, and abut against the fourth sealing ring 12. The double threads and three sealing rings provide stronger sealing, and damage to a single sealing ring does not affect the sealing performance. As the threads of the male connector 1 and female connector 13 are tightened, the connecting bolts 16 are passed through the flange eyes 18 on the first flange 14 and the second flange 15, and the anti-loosening nuts 17 are screwed on for tightening. The two sets of connecting bolts 16 lock the first flange 14 and the second flange 15, fixing the angle of the male connector 1 and the female connector 13 and preventing them from rotating or loosening. With the threads of the male connector 1 and the female connector 13 tightened, the internal threaded connecting tube 19 on the male connector 1 is rotated so that it travels along the external threads of the female connector 13 until it comes into contact with the first flange 14. The internal threaded connecting tube 19 can increase the tightness of the connection between the male connector 1 and the female connector 13 and increase the tensile strength.

[0032] It will be apparent to those skilled in the art that this invention is not limited to the details of the exemplary embodiments described above, and that it can be implemented in other specific forms without departing from the spirit or essential characteristics of this invention. Therefore, the embodiments should be considered illustrative and non-limiting in all respects, and the scope of this invention is defined by the appended claims rather than the foregoing description. Thus, it is intended that all variations falling within the meaning and scope of equivalents of the claims be included within this invention. No reference numerals in the claims should be construed as limiting the scope of the claims.

Claims

1. A gas-tight threaded connection structure, comprising a male connector (1), characterized in that: A female connector (13) is provided on the left side of the male connector (1), and a multi-layer sealing structure is provided between the male connector (1) and the female connector (13); The sealing structure includes a primary extension head (3), which is fixedly connected to the left side of the male connector (1). A secondary extension head (5) is fixedly connected to the left side of the primary extension head (3). A first sealing ring (2) is glued to the outer periphery of the left side of the male connector (1). A second sealing ring (4) is glued to the outer periphery of the left side of the primary extension head (3). A third sealing ring (6) is glued to the left side of the secondary extension head (5). A primary connecting cavity (7) is provided inside the right side of the female connector (13). A secondary connecting cavity (8) is provided to the left side of the primary connecting cavity (7). A first annular groove (9) is opened on the left side inside the secondary connecting cavity (8). A second annular groove (10) is opened on the left side inside the primary connecting cavity (7). A third annular groove (11) is opened on the outer periphery of the right side of the female connector (13). A fourth sealing ring (12) is glued to the inside of the first annular groove (9), the second annular groove (10), and the third annular groove (11).

2. The gas-tight threaded connection structure according to claim 1, characterized in that: The first-level extension head (3) and the second-level extension head (5) are respectively threaded on the outside, and the first-level connecting cavity (7) and the second-level connecting cavity (8) are respectively threaded on the inside. The threads on the outside of the first-level extension head (3) and the second-level extension head (5) match the threads inside the first-level connecting cavity (7) and the second-level connecting cavity (8).

3. The gas-tight threaded connection structure according to claim 1, characterized in that: The outer diameters of the male connector (1) and the female connector (13) are the same, and the horizontal center lines of the male connector (1) and the female connector (13) coincide.

4. The gas-tight threaded connection structure according to claim 1, characterized in that: The positional dimensions of the first sealing ring (2), the second sealing ring (4), and the third sealing ring (6) correspond one-to-one with the positional dimensions of the third annular groove (11), the second annular groove (10), and the first annular groove (9). The left sides of the first sealing ring (2), the second sealing ring (4), and the third sealing ring (6) are respectively attached to the right side of the fourth sealing ring (12).

5. The gas-tight threaded connection structure according to claim 1, characterized in that: The female connector (13) is fixedly connected to the outside of a first flange (14), and the male connector (1) is fixedly connected to the outside of a second flange (15). The first flange (14) and the second flange (15) are respectively provided with four sets of flange eyes (18). Two sets of connecting bolts (16) are horizontally inserted between the first flange (14) and the second flange (15). The connecting bolts (16) are fitted with anti-loosening nuts (17). The first flange (14) and the second flange (15) have the same shape and size. The connecting bolts (16) pass through the flange eyes (18) and extend to the outside.

6. The gas-tight threaded connection structure according to claim 1, characterized in that: The left side of the male connector (1) is fitted with an internally threaded connecting tube (19). The male connector (1) and the female connector (13) are respectively threaded. The external threads of the male connector (1) and the female connector (13) match the internal threads of the internally threaded connecting tube (19).

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