Pipeline connecting flange with high sealing performance

Abstract

The utility model relates to the technical field of flanges, and discloses a pipeline connecting flange with strong sealing performance, which comprises a flange assembly and fixing assemblies fixedly connected with two sides of the flange assembly, the flange assembly comprises a flange plate, one side of the flange plate is fixedly connected with a connecting pipe, and one side of the flange plate is in threaded connection with a locking sleeve. The fixing assembly comprises a bolt, the bolt penetrates through the two flange plates and then is in threaded connection with a fastening nut A, an anti-skid sleeve is arranged on one side of the fastening nut A, a spring gasket is arranged on one side of the anti-skid sleeve, and the surface of the outer side of the bolt is sleeved with the spring gasket. A fastening nut B is movably connected to one side of the spring gasket, the fixing assembly is arranged, the anti-skid sleeve is connected to the bolt in a sliding mode, locking grooves are formed in the anti-skid sleeve and the fastening nut B, vibration generated in the surface pipeline running process enables the bolt and the nut to be loosened, and the sealing performance between flanges is improved.

Description

Technical Field

[0001] The utility model relates to the technical field of flanges, in particular to a pipeline connection flange with strong sealing performance. Background Technique

[0002] A flange, also known as a flange convex disc or a flange. A flange is a part used for connecting shafts to each other and is used for connecting between pipe ends; there are also flanges used at the inlets and outlets of equipment for connecting two pieces of equipment, such as a reducer flange. A flange connection or a flange joint refers to a detachable connection composed of a flange, a gasket, and bolts connected to each other as a set of combined sealing structures.

[0003] Chinese patent document CN218441142U discloses a connection flange structure with high sealing performance, including a sealing gasket. Flange plates are arranged on both sides of the sealing gasket, and short rods are fixedly connected to both sides of the outer wall of one side of the flange plate. The utility model solves the problem that when personnel install bolts, the sealing gasket is displaced under the influence of gravity, and small gaps are likely to appear, resulting in a decrease in sealing performance. Without the need for personnel to assist in supporting the sealing gasket, the position of the sealing gasket can be ensured to be accurate, the installation difficulty of the flange plate is reduced, and the sealing performance of the flange plate is enhanced. However, during the process of the pipeline transporting liquid, when the pressure of the liquid changes, it will drive the overall vibration of the pipeline. After a long time, the bolts and nuts of the connection flange will become loose, thus affecting the sealing performance between the flanges and causing the pipeline to leak. Content of the Utility Model

[0004] The purpose of the utility model is to solve the problem that during the process of the existing pipeline transporting liquid, when the pressure of the liquid changes, it will drive the overall vibration of the pipeline. After a long time, the bolts and nuts of the connection flange will become loose, thus affecting the sealing performance between the flanges and causing the pipeline to leak, and to propose a pipeline connection flange with strong sealing performance.

[0005] To achieve the above purpose, the utility model adopts the following technical scheme: A pipeline connection flange with strong sealing performance includes a flange assembly, and fixing components are fixedly connected to both sides of the flange assembly. The flange assembly includes a flange disc, a connecting pipe is fixedly connected to one side of the flange disc, a locking sleeve is threadedly connected to one side of the flange disc, an expansion sleeve is movably connected to the inner surface of the locking sleeve, the lower end of the expansion sleeve is fixedly connected to the flange disc, a sealing ring is movably connected to the other side of the flange disc. The fixing component includes a bolt, the bolt passes through two sets of flange discs and is threadedly connected to a fastening nut A. An anti-slip sleeve is arranged on one side of the fastening nut A, the inner surface of the anti-slip sleeve is slidably connected to the bolt, a spring washer is arranged on one side of the anti-slip sleeve, the outer surface of the bolt is sleeved with a spring washer, and a fastening nut B is movably connected to one side of the spring washer, and the inner surface of the fastening nut B is threadedly connected to the bolt.

[0006] Preferably, an installation groove is formed on the flange disc;

[0007] It is used to conveniently clamp the sealing ring between two groups of flange plates to increase the sealing performance between the two groups of flange plates.

[0008] Preferably, threaded grooves are provided on the flange plates, threads are provided on the outer surface of the locking sleeve, the threaded grooves correspond to the threads, anti-slip grooves are provided on the locking sleeve, and tapered grooves are provided inside the locking sleeve;

[0009] It is used to rotate the locking sleeve to move it downward while tightening the expansion sleeve.

[0010] Preferably, grooves are provided on the inner surface of the expansion sleeve;

[0011] It is used to increase the friction between the expansion sleeve and the bolt.

[0012] Preferably, fixing grooves are provided on the bolt, fixing blocks are fixedly connected to the inner surface of the anti-slip sleeve, and the outer surface of the fixing blocks is slidably connected to the fixing grooves;

[0013] It is used to prevent loosening between the bolt and the nut when the pipeline vibrates.

[0014] Preferably, a locking groove A is provided at one end of the anti-slip sleeve, a locking groove B is provided at one end of the fastening nut B, and the outer surface of the locking groove A is movably connected to the locking groove B;

[0015] It is used to increase the friction between the anti-slip sleeve and the fastening nut B to prevent loosening between the bolt and the nut due to the vibration of the pipeline.

[0016] Compared with the prior art, the utility model has the following beneficial effects:

[0017] 1. For a pipeline connection flange with strong sealing performance proposed by the utility model, by setting a fixing component, an anti-slip sleeve is slidably connected to the bolt, and locking grooves are provided on both it and the fastening nut B, which can prevent loosening between the bolt and the nut caused by the vibration generated during the operation of the pipeline and maintain the sealing performance between the operating flanges.

[0018] 2. For a pipeline connection flange with strong sealing performance proposed by the utility model, by setting a flange component, a locking sleeve is threadedly connected to the flange plate. When the locking sleeve is rotated downward, the locking sleeve acts on the expansion sleeve to tighten the expansion sleeve and increase the friction between it and the bolt. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] Figure 1 It is a schematic diagram of the overall structure of a pipeline connection flange with strong sealing performance proposed by the utility model;

[0020] Figure 2 It is a schematic diagram of the overall structure of the flange component of a pipeline connection flange with strong sealing performance proposed by the utility model;

[0021] Figure 3 A cross-sectional schematic view of a flange assembly of a pipe connection flange with strong sealing performance proposed by the present utility model;

[0022] Figure 4 An overall structural schematic view of a fixing assembly of a pipe connection flange with strong sealing performance proposed by the present utility model;

[0023] Figure 5 An overall structural schematic view of a bolt of a pipe connection flange with strong sealing performance proposed by the present utility model;

[0024] Figure 6 An overall structural schematic view of an anti-slip sleeve of a pipe connection flange with strong sealing performance proposed by the present utility model;

[0025] 1. Flange assembly; 11. Flange plate; 111. Installation groove; 112. Thread groove; 12. Connecting pipe; 13. Locking sleeve; 131. Anti-slip groove; 132. Thread; 133. Conical groove; 14. Expansion sleeve; 141. Groove; 15. Sealing ring; 2. Fixing assembly; 21. Bolt; 211. Fixing groove; 22. Tightening nut A; 23. Anti-slip sleeve; 231. Locking groove A; 232. Fixing block; 24. Spring washer; 25. Tightening nut B; 251. Locking groove B. Specific implementation manners

[0026] Next, the technical solutions in the embodiments of the present utility model will be clearly and completely described in conjunction with the accompanying drawings in the embodiments of the present utility model. Obviously, the described embodiments are only a part of the embodiments of the present utility model, rather than all of the embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative efforts shall fall within the protection scope of the present utility model.

[0027] In the description of the present utility model, it should be noted that the orientation or positional relationship indicated by terms such as "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer", etc. is based on the orientation or positional relationship shown in the drawings. It is only for the convenience of describing the present utility model and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation. Therefore, it should not be construed as a limitation to the present utility model; the terms "first", "second", "third" are only used for descriptive purposes and cannot be understood as indicating or implying relative importance. In addition, unless otherwise clearly specified and defined, the terms "installation", "connection", "coupling" should be understood in a broad sense. For example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be directly connected or indirectly connected through an intermediate medium, and it can be the communication inside two elements. For those of ordinary skill in the art, the specific meanings of the above terms in the present utility model can be understood according to specific circumstances.

[0028] Referring to Figure 1-6 , an embodiment provided by the present utility model: a pipe connection flange with strong sealing performance, including a flange assembly 1, and fixed components 2 fixedly connected to both sides of the flange assembly 1. The flange assembly 1 includes a flange plate 11. A connecting pipe 12 is fixedly connected to one side of the flange plate 11, which is convenient for welding operations with the pipe. A locking sleeve 13 is threadedly connected to one side of the flange plate 11 to tighten the expansion sleeve 14. An expansion sleeve 14 is movably connected to the inner surface of the locking sleeve 13 to increase the friction between the flange plate 11 and the bolt 21. The lower end of the expansion sleeve 14 is fixedly connected to the flange plate 11. A sealing ring 15 is movably connected to the other side of the flange plate 11 to increase the sealing performance between the two flange plates 11. The fixed component 2 includes a bolt 21. The bolt 21 passes through the two flange plates 11 and is threadedly connected to a fastening nut A 22. An anti-slip sleeve 23 is provided on one side of the fastening nut A 22 to prevent the fastening nut A 22 from loosening. The inner surface of the anti-slip sleeve 23 is slidably connected to the bolt 21. A spring washer 24 is provided on one side of the anti-slip sleeve 23 to increase the friction between the anti-slip sleeve 23 and the fastening nut B 25 to prevent it from loosening. A spring washer 24 is sleeved on the outer surface of the bolt 21. A fastening nut B 25 is movably connected to one side of the spring washer 24. The inner surface of the fastening nut B 25 is threadedly connected to the bolt 21.

[0029] The flange 11 is provided with an installation groove 111 for facilitating the installation of the sealing ring 15. The flange 11 is provided with a threaded groove 112. The outer surface of the locking sleeve 13 is provided with a thread 132. The threaded groove 112 corresponds to the thread 132. And the locking sleeve 13 is provided with an anti-slip groove 131 for facilitating the rotation of the locking sleeve 13 by a tool. The inner part of the locking sleeve 13 is provided with a tapered groove 133 for facilitating the locking of the expansion sleeve 14. The inner surface of the expansion sleeve 14 is provided with a groove 141 to increase the friction between the expansion sleeve 14 and the bolt 21. The bolt 21 is provided with a fixing groove 211. The inner surface of the anti-slip sleeve 23 is fixedly connected with a fixing block 232. The outer surface of the fixing block 232 is slidably connected to the fixing groove 211 to prevent the anti-slip sleeve 23 from rotating on the bolt 21. One end of the anti-slip sleeve 23 is provided with a locking groove A 231. One end of the fastening nut B 25 is provided with a locking groove B 251. The outer surface of the locking groove A 231 is movably connected to the locking groove B 251 to increase the friction between the anti-slip sleeve 23 and the fastening nut B 25 and prevent loosening due to the vibration of the pipeline.

[0030] Working principle: First, weld the pipeline and the connecting pipe 12 together. Then, place the sealing ring 15 into the installation groove 111. After docking the two flanges 11 together, pass the bolt 21 through the two flanges 11. Then, connect the fastening nut A to the bolt 21 to install the two flanges 11 together. Then, slip the anti-slip sleeve 23 onto the bolt 21, then slip on the spring washer 24, and finally thread the fastening nut B onto the bolt 21. Then, rotate the locking sleeve 13 with a tool to tighten the expansion sleeve 14 and increase the friction between the expansion sleeve 14 and the bolt 21 to prevent the fastening nut A 22 and the fastening nut B 25 from loosening during the operation of the pipeline, thus causing leakage of the flange.

[0031] Finally, it should be noted that the above are only the preferred embodiments of the present invention and are not used to limit the present invention. Although the present invention has been described in detail with reference to the foregoing embodiments, those skilled in the art can still modify the technical solutions described in the foregoing embodiments or perform equivalent replacements for some of the technical features. Any modifications, equivalent replacements, improvements, etc. made within the spirit and principle of the present invention shall be included within the protection scope of the present invention.

Claims

1. A pipeline connection flange with strong sealing performance, comprising a flange component (1), and fixing components (2) fixedly connected to both sides of the flange component (1), characterized in that: The flange assembly (1) comprises a flange (11), one side of the flange (11) is fixedly connected to a connecting pipe (12), one side of the flange (11) is threadedly connected to a locking sleeve (13), the inner surface of the locking sleeve (13) is movably connected to an expansion sleeve (14), the lower end of the expansion sleeve (14) is fixedly connected to the flange (11), and the other side of the flange (11) is movably connected to a sealing ring (15), the fixing assembly (2) comprises a bolt (21), and the bolt (21) penetrates the two sets of threaded connecting members. The blue plate (11) is threadedly connected with a fastening nut A (22) at the rear, an anti-slip sleeve (23) is arranged on one side of the fastening nut A (22), the inner surface of the anti-slip sleeve (23) is slidably connected to the bolt (21), a spring washer (24) is arranged on one side of the anti-slip sleeve (23), the outer surface of the bolt (21) is sleeved with the spring washer (24), a fastening nut B (25) is movably connected to one side of the spring washer (24), and the inner surface of the fastening nut B (25) is threadedly connected to the bolt (21).

2. A pipeline connection flange with strong sealing performance according to claim 1, characterized in that: The flange (11) is provided with a mounting groove (111).

3. The pipeline connection flange with strong sealing performance according to claim 1, characterized in that: The flange (11) is provided with a thread groove (112), the outer surface of the locking sleeve (13) is provided with a thread (132), the thread groove (112) corresponds to the thread (132), the locking sleeve (13) is provided with an anti-slip groove (131), and the locking sleeve (13) is provided with a tapered groove (133) inside.

4. The pipeline connection flange with strong sealing performance according to claim 1, characterized in that: The inner surface of the expansion sleeve (14) is provided with a groove (141).

5. The pipeline connection flange with strong sealing performance according to claim 1, characterized in that: The bolt (21) is provided with a fixing groove (211), the inner surface of the anti-slip sleeve (23) is fixedly connected with a fixing block (232), and the outer surface of the fixing block (232) is slidably connected with the fixing groove (211).

6. The pipeline connection flange with strong sealing performance according to claim 1, characterized in that: A locking groove A (231) is formed at one end of the anti-slip sleeve (23), a locking groove B (251) is formed at one end of the fastening nut B (25), and the outer surface of the locking groove A (231) is movably connected to the locking groove B (251).

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