High-pressure-resistant pipeline connecting flange

Abstract

The utility model relates to the field of flanges, discloses a high-pressure-resistant pipeline connecting flange, and solves the problems that in the operation process of a matching mode of a bolt rod and a nut, due to the influence of factors such as vibration, vibration, impact or temperature change, the flange connecting position is subjected to extra force or stress, bolts are likely to be loosened, and the pipeline connecting flange is damaged. The high-pressure-resistant pipeline connecting flange comprises a first flange body and a sealing ring arranged on one side of the connecting end of the first flange body, a limiting assembly and a pushing assembly are arranged, the pushing assembly moves towards the first flange body, and therefore the sealing performance of the first flange body is improved. The limiting assembly moves towards the direction of the second flange, after bolt connection is completed, the pushing assembly moves towards the direction of the second flange so that the bolt can be limited, compared with the prior art, the bolt cannot rotate easily when bearing extra stress, and therefore the possibility that the sealing performance of the flange connecting position is reduced is reduced.

Description

Technical Field

[0001] The utility model relates to the field of flanges, in particular to a high-pressure resistant pipeline connecting flange. Background Art

[0002] Pipe connection flange is a common way to connect pipes. Its basic principle is to use two flanges to connect two pipes through bolts, gaskets and other connectors.

[0003] Publication number CN208431485U discloses a natural gas pipeline connection flange with good high-pressure resistance and sealing performance, including a flange pipe, a No. 1 flange ring and a No. 2 flange ring. The No. 2 flange ring is provided on the side of the flange pipe away from the No. 1 flange ring. The existing connection flange connection method mainly adopts the method of matching bolt rods and nuts for connection. However, during operation, the matching method of the bolt rods and nuts is affected by factors such as vibration, impact or temperature changes, and the flange connection is subjected to additional force or stress, which may cause the bolts to loosen, thereby increasing the probability of reduced sealing performance of the flange connection. Utility Model Content

[0004] The purpose of the utility model is to provide a high-pressure resistant pipeline connection flange. By adopting the device, the problem that the flange connection is subjected to additional force or stress during operation due to the influence of factors such as vibration, impact or temperature change caused by the matching mode between the bolt rod and the nut, which may cause the bolt to loosen, thereby increasing the probability of reduced sealing performance of the flange connection, is solved.

[0005] To achieve the above-mentioned object, the present invention provides the following technical solution: a high-pressure resistant pipe connection flange, comprising a first flange, a sealing ring provided on one side of a connection end of the first flange, a second flange provided on one side of a connection end of the sealing ring, a first bolt hole provided inside the first flange, a second bolt hole provided inside the second flange, a bolt provided inside the first bolt hole, a nut threadedly connected to one end of the bolt near the second flange, a limit assembly provided inside the nut, and a pushing assembly provided outside the second flange;

[0006] A first groove is provided inside the bolt, and the limiting assembly includes a rubber elastic pad provided inside the first groove. The upper end of the rubber elastic pad is fixedly connected to the limiting plate, and the lower surface of the rubber elastic pad is fixedly connected to the bolt.

[0007] Preferably, the lower end of the limiting plate has an external appearance structure of a cuboid, and the outer side surface of the limiting plate fits in with the inner side surface of the first groove.

[0008] Preferably, the height of one end of the limiting plate close to the second flange is lower than the height of one end of the limiting plate close to the first flange.

[0009] Preferably, the upper surface of the limiting plate is arc-shaped, and two limiting plates are symmetrically arranged about the central axis of the bolt.

[0010] Preferably, the pushing assembly includes a push plate arranged on the outside of the second flange, a hole is arranged inside the push plate, a limiting rod is arranged on the inside of the hole, a first threaded hole is arranged inside the limiting rod on the side close to the first flange, a second threaded hole is arranged inside the limiting rod on the side away from the first flange, a threaded rod is arranged inside the push plate on the side away from the first flange, a first limiting groove is arranged inside the push plate on the side close to the first flange, and a second limiting groove is arranged on one side of the first limiting groove.

[0011] Preferably, the inner wall of the hole fits with the outer wall of the limiting rod, the limiting rod and the second flange are connected in a fixed manner, and the width of the limiting rod is greater than the width of the limiting rod.

[0012] Preferably, the width of the second limiting groove is consistent with the width of the bolt.

[0013] Preferably, the width of the first limiting groove is consistent with the width of the nut.

[0014] The utility model proposes a high-pressure resistant pipeline connection flange, which is equipped with a limiting component and a pushing component, so that the pushing component is moved toward the first flange and the limiting component is moved toward the second flange. After the bolt connection is completed, the pushing component is moved toward the second flange to limit the bolt. Compared with the existing technology, the bolt will not rotate easily when subjected to additional stress, thereby reducing the possibility of reduced sealing performance at the flange connection. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] Figure 1 This is a schematic diagram of the overall three-dimensional structure of the utility model;

[0016] Figure 2 This is a schematic diagram of the front cross-sectional structure of the first flange of the present invention;

[0017] Figure 3 This is a schematic diagram of the front cross-sectional structure of the push plate of the present utility model;

[0018] Figure 4 For the utility model Figure 2 Schematic diagram of the structure at A in the middle;

[0019] Figure 5 For the utility model Figure 3 Schematic diagram of the structure at point B in the middle.

[0020] In the figure: 1. First flange; 2. Sealing ring; 3. Second flange; 4. First bolt hole; 5. Second bolt hole; 6. Bolt; 7. Nut; 8. Limiting assembly; 9. Pushing assembly; 10. First groove; 801. Rubber elastic pad; 802. Limiting plate; 901. Pushing plate; 902. Hole; 903. Limiting rod; 904. First threaded hole; 905. Second threaded hole; 906. Threaded rod; 907. First limiting groove; 908. Second limiting groove. DETAILED DESCRIPTION

[0021] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the embodiments described are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without making creative efforts are within the scope of protection of the present invention.

[0022] See also Figure 1-Figure 5 The utility model provides a technical solution: a high-pressure resistant pipe connection flange, comprising a first flange 1, a sealing ring 2 arranged on one side of the connection end of the first flange 1, a second flange 3 arranged on one side of the connection end of the sealing ring 2, a first bolt hole 4 arranged inside the first flange 1, a second bolt hole 5 arranged inside the second flange 3, a bolt 6 arranged inside the first bolt hole 4, a nut 7 threadedly connected to the bolt 6 near one end of the second flange 3, a limiting component 8 arranged inside the nut 7, and a pushing component 9 arranged on the outside of the second flange 3;

[0023] The bolt 6 is provided with a first groove 10 inside, and the limit assembly 8 includes a rubber elastic pad 801 arranged on the inner side of the first groove 10. The upper end of the rubber elastic pad 801 is fixedly connected to the limit plate 802, and the lower surface of the rubber elastic pad 801 is fixedly connected to the bolt 6. The lower end appearance structure of the limit plate 802 is a rectangular parallelepiped, and the outer side surface of the limit plate 802 is in contact with the inner side surface of the first groove 10, so that the limit plate 802 can move up and down inside the first groove 10 without rotating. The height of the end of the limit plate 802 close to the second flange 3 is lower than the height of the end of the limit plate 802 close to the first flange 1, so that the limit plate 802 can move downward along the hypotenuse of the limit plate 802. The upper surface of the limit plate 802 is arc-shaped, and two limit plates 802 are symmetrically arranged about the central axis of the bolt 6, so that the limit plate 802 can push the limit plate 802 to move toward the inner side of the first groove 10 along the teeth of the nut 7.

[0024] The pushing assembly 9 includes a push plate 901 arranged on the outside of the second flange 3, a hole 902 is provided inside the push plate 901, a limiting rod 903 is provided on the inside of the hole 902, the inner wall of the hole 902 is in contact with the outer wall of the limiting rod 903, and the limiting rod 903 is connected to the second flange 3 in a fixed manner, and the width of the limiting rod 903 is greater than the width of the limiting rod 903, so that the push plate 901 can move outside the limiting rod 903, and the limiting rod 903 is provided with a first threaded hole 904 on the side close to the first flange 1. A second threaded hole 905 is provided inside the side away from the first flange 1, a threaded rod 906 is provided inside the push plate 901 away from the first flange 1, a first limiting groove 907 is provided inside the side of the push plate 901 close to the first flange 1, and a second limiting groove 908 is provided on one side of the first limiting groove 907. The width of the second limiting groove 908 is consistent with the width of the bolt 6, so that the bolt 6 can move to the inner side of the second limiting groove 908, and the width of the first limiting groove 907 is consistent with the width of the nut 7, so that the nut 7 can move to the inner side of the first limiting groove 907.

[0025] When the nut 7 is in the first position, the nut 7 is locked and the screw 6 is pushed out of the locking nut 7. When the nut 7 is locked, the nut 7 is locked and the screw 6 is pushed out of the locking nut 7. When the nut 7 is locked, the nut 7 is locked and the screw 6 is pushed out of the first position, the nut 7 is locked and the screw 6 is pushed out of the first position, the nut 7 is locked and the screw 6 is pushed out of the first position, the nut 7 is locked and the screw 6 is pushed out of the first position, the nut 7 is locked and the screw 6 is pushed out of the first position, the nut

[0026] When disassembling, turn the threaded rod 906 so that the threaded rod 906 moves out from the inside of the second threaded hole 905, push the push plate 901, so that the threaded rod 906 can move to the inside of the first threaded hole 904, so that the first limiting groove 907 covers the nut 7, and the second limiting groove 908 covers the bolt 6, so that the limiting plate 802 moves along its oblique edge to the inner side of the first groove 10, and rotate the bolt 6 so that the first flange 1 and the second flange 3 can be disassembled.

[0027] It should be noted that, in this document, relational terms such as first and second, etc., are used only to distinguish one entity or operation from another entity or operation, and do not necessarily require or imply any actual relationship or order between these entities or operations. Moreover, the terms "comprises," "comprising," or any other variations thereof are intended to cover non-exclusive inclusion, such that a process, method, article, or apparatus that includes a list of elements includes not only those elements but also other elements not explicitly listed, or elements inherent to such process, method, article, or apparatus.

[0028] Although the 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 variations may be made to these embodiments without departing from the principles and spirit of the present invention, and the scope of the present invention is defined by the appended claims and their equivalents.

Claims

1. A high-pressure resistant pipe connection flange, comprising a first flange (1), a sealing ring (2) provided on one side of a connection end of the first flange (1), a second flange (3) provided on one side of a connection end of the sealing ring (2), a first bolt hole (4) provided inside the first flange (1), a second bolt hole (5) provided inside the second flange (3), a bolt (6) provided inside the first bolt hole (4), and a nut (7) threadedly connected to one end of the bolt (6) near the second flange (3), characterized in that: A limiting component (8) is provided inside the nut (7), and a pushing component (9) is provided outside the second flange (3); A first groove (10) is provided inside the bolt (6), and the limiting assembly (8) includes a rubber elastic pad (801) provided inside the first groove (10), the upper end of the rubber elastic pad (801) is fixedly connected to the limiting plate (802), and the lower surface of the rubber elastic pad (801) is fixedly connected to the bolt (6).

2. The high-pressure resistant pipe connection flange according to claim 1, characterized in that: The lower end of the limiting plate (802) has an external appearance structure of a cuboid, and the outer side surface of the limiting plate (802) fits in contact with the inner side surface of the first groove (10).

3. The high-pressure resistant pipe connection flange according to claim 1, characterized in that: The height of one end of the limiting plate (802) close to the second flange (3) is lower than the height of one end of the limiting plate (802) close to the first flange (1).

4. The high-pressure resistant pipe connection flange according to claim 1, characterized in that: The upper surface of the limiting plate (802) is arc-shaped, and two limiting plates (802) are symmetrically arranged about the central axis of the bolt (6).

5. The high-pressure resistant pipe connection flange according to claim 1, characterized in that: The pushing assembly (9) includes a push plate (901) arranged on the outside of the second flange (3), a hole (902) is arranged inside the push plate (901), a limiting rod (903) is arranged inside the hole (902), a first threaded hole (904) is arranged inside the limiting rod (903) on the side close to the first flange (1), a second threaded hole (905) is arranged inside the limiting rod (903) on the side away from the first flange (1), a threaded rod (906) is arranged inside the side of the push plate (901) away from the first flange (1), a first limiting groove (907) is arranged inside the push plate (901) on the side close to the first flange (1), and a second limiting groove (908) is arranged on one side of the first limiting groove (907).

6. The high-pressure resistant pipe connection flange according to claim 5, characterized in that: The inner wall of the hole (902) fits the outer wall of the limiting rod (903), and the connection between the limiting rod (903) and the second flange (3) is a fixed connection, and the width of the limiting rod (903) is greater than the width of the limiting rod (903).

7. The high-pressure resistant pipe connecting flange according to claim 5, characterized in that: The width of the second limiting groove (908) is consistent with the width of the bolt (6).

8. The high-pressure resistant pipe connecting flange according to claim 5, characterized in that: The width of the first limiting groove (907) is consistent with the width of the nut (7).

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