Double-sealing flange

Abstract

The utility model discloses a double-sealing flange which comprises a left valve body through pipe and a right valve body through pipe. The ends, close to each other, of the left valve body through pipe and the right valve body through pipe are connected through threads, and limiting rings are arranged at the joints. The ends, away from each other, of the left valve body through pipe and the right valve body through pipe are movably connected with a flange static disc. The left valve body through pipe and the right valve body through pipe are vertically provided with sliding protruding blocks along the outer circumference. The sliding protruding block is sleeved with a flange movable disc through a sliding groove. And a plurality of through holes are formed in the flange movable disc and the flange static disc. The double-sealing structure is arranged between the flange connecting faces, sealing performance is improved, leakage is prevented, and the double-sealing flange is particularly suitable for high-pressure, high-temperature or corrosive medium environments.

Description

TECHNICAL FIELD

[0001] The utility model relates to flange sealing technical field more particularly is related to a double sealing flange. BACKGROUND

[0002] In the prior art, the flange as the connecting component between the pipeline, container and other equipment, its sealing performance directly influences the safety and stability of the whole system. However, the traditional flange usually adopts single layer sealing structure, such as rubber gasket or metal gasket, under the high pressure, high temperature or corrosive medium environment, often there are problems such as sealing not strict, easy to leak, especially under the high pressure, high temperature or corrosive environment, these problems are more prominent. Therefore, it is particularly important to develop a flange connecting device with better sealing performance. SUMMARY

[0003] The utility model provides a double sealing flange to solve the prior art problems.

[0004] To achieve the above object, the utility model embodiment provides a double sealing flange, comprising: left valve body pipe and right valve body pipe, the left valve body pipe and right valve body pipe are connected by thread at the end of mutual approach, and the connecting place is equipped with limit ring, the left valve body pipe and right valve body pipe are movably connected with flange static disc at the end of mutual departure,

[0005] The left valve body pipe and right valve body pipe are vertically provided with sliding protrusions along the outer perimeter, and the flange dynamic disc is provided on the sliding protrusions through the sliding groove,

[0006] The flange dynamic disc and flange static disc are provided with a plurality of through holes.

[0007] Preferably, the side of the flange dynamic disc close to the limit ring is further provided with a limit groove.

[0008] Preferably, the limit ring is further provided with a sealing gasket.

[0009] Preferably, the through holes on the flange dynamic disc and flange static disc are staggered.

[0010] Preferably, the flange static disc is provided with a notch at the position of the through hole of the flange dynamic disc.

[0011] Compared with the prior art, the utility model has the following advantages:

[0012] The utility model sets up double sealing structure, significantly improves the sealing performance of the flange, especially suitable for high pressure, high temperature or corrosive medium environment, effectively prevents the leakage problem.

[0013] The double-sealing structure design significantly improves the sealing performance, and the two sealing rings cooperate with each other, so that even if one sealing ring slightly leaks, the other sealing ring can still play a sealing role, and the risk of leakage is greatly reduced. The rubber material of the first sealing ring and the metal material of the second sealing ring are combined, and the elastic sealing and the high-temperature resistance and corrosion resistance are considered, so that the flange is suitable for various working conditions, and the application range of the flange is widened.

[0014] The design of the sliding protrusion and the sliding groove ensures the centering property during the installation of the flange, and avoids the sealing failure caused by the misalignment of the flange moving disc.

[0015] The sliding protrusion is provided with a reinforcing rib, the overall strength and deformation resistance of the flange are improved, and the service life of the flange is prolonged. BRIEF DESCRIPTION OF DRAWINGS

[0016] In order to more clearly illustrate the technical schemes in the embodiments of the present application or the prior art, the drawings needed in the following embodiment or prior art description will be briefly introduced. Obviously, the drawings in the following description are only embodiments of the present application, and for those skilled in the art, other drawings can be obtained without creative labor on the basis of the provided drawings.

[0017] Fig. 1 The drawings are structural schematic diagrams of the present application.

[0018] Fig. 2 The drawings are structural schematic diagrams of the flange moving disc of the present application.

[0019] Reference signs: 1, left valve body pipe; 2, right valve body pipe; 3, flange moving disc; 4, flange static disc; 5, sliding protrusion; 6, through hole; 7, limiting ring; 8, sliding groove; 9, limiting groove. DETAILED DESCRIPTION

[0020] The technical schemes in the embodiments of the present application will be described clearly and completely in combination with the drawings in the embodiments of the present application. Obviously, the described embodiments are only a part of the embodiments of the present application, rather than all the embodiments. Based on the embodiments in the present application, all other embodiments obtained by those skilled in the art without creative labor fall within the scope of protection of the present application.

[0021] Please refer to the drawings Figs. 1-2 The present application discloses a double-sealing flange, which comprises: a left valve body pipe 1 and a right valve body pipe 2; the left valve body pipe 1 and the right valve body pipe 2 are connected by threads at the end close to each other, and a limiting ring 7 is arranged at the connection; the left valve body pipe 1 and the right valve body pipe 2 are movably connected with a flange static disc 4 at the end away from each other.

[0022] The left valve body pipe 1 and the right valve body pipe 2 are vertically provided with sliding protrusions 5 along the outer periphery; the sliding protrusions 5 are provided with flange moving discs 3 through sliding grooves 8;

[0023] The flange moving discs 3 can slide on the valve body pipes through the sliding grooves 8; in use, the left valve body pipe 1 and the right valve body pipe 2 can be threadedly connected by rotating the flange moving disc 3 on one side of the valve body pipe.

[0024] The flange stationary discs 4 provided at the bottom of the valve body pipes can stabilize the entire sealing structure and limit the position of the flange moving discs 3.

[0025] The design of the sliding protrusions 5 and the sliding grooves 8 ensures the centring of the flange during installation and avoids sealing failure due to mispositioning of the flange moving discs 3.

[0026] The sliding grooves 8 can be provided with several strips, preferably five strips, to form annular reinforcing ribs to improve the overall strength and deformation resistance of the flange and prolong the service life of the flange.

[0027] The flange moving discs 3 and the flange stationary discs 4 are provided with several through holes 6.

[0028] The through holes 6 are preferably six, and fastening bolts and nuts can be used through the through holes 6 to fix the two flange moving discs 3.

[0029] The through holes 6 on the flange stationary discs 4 can fix one end of the valve body pipe to anywhere, such as a wall or a mechanical surface, through a fastening device, thereby increasing the practicability of the valve body pipe.

[0030] In order to further optimize the above technical solution, one side of the flange moving disc 3 close to the limiting ring 7 is further provided with a limiting groove 9.

[0031] In order to further optimize the above technical solution, the limiting ring 7 is further provided with a sealing gasket.

[0032] The sealing gasket wraps the outer periphery of the limiting ring 7, and the material is rubber or polytetrafluoroethylene, preferably rubber, to improve the high temperature resistance and high pressure resistance.

[0033] The sealing connection of the limiting groove 9 and the limiting ring 7 further strengthens the centring of the flange moving disc 3 and increases the sealing performance of the sealing flange.

[0034] The first sealing device adopts threaded connection, and the rubber material on the limiting ring 7 has good elasticity and flexibility, which can effectively fill the sealing gap; the second sealing ring adopts metal material, which is resistant to high temperature and corrosion, and can maintain stable sealing performance in harsh environments.

[0035] In order to further optimize the above technical solution, the through holes 6 on the flange moving disc 3 and the flange stationary disc 4 are staggered.

[0036] In order to further optimize the above technical solutions, the flange static disc 4 is provided with a notch at the position of the through hole of the flange dynamic disc 3.

[0037] The staggered arrangement of the notch and the through hole 6 at the position of the through hole of the flange dynamic disc 3 can save materials, provide construction space, and make it more convenient for personnel to operate.

[0038] The working principle and use process of the utility model are as follows: a double-sealing flange, when installing, the left valve body through pipe 1 and the right valve body through pipe 2 are close to each other, the flange dynamic disc 3 is rotated, the left valve body through pipe 1 and the right valve body through pipe 2 are threadedly connected, at this time, the limiting rings 7 on the left valve body through pipe 1 and the right valve body through pipe 2 are closed together, the first layer sealing is completed, the flange dynamic disc 3 on the left valve body through pipe 1 and the right valve body through pipe 2 is slid, the limiting groove 9 on the flange dynamic disc 3 is clamped into the limiting ring 7, at this time, the two flange dynamic discs 3 are tightly attached, the two flange dynamic discs 3 are fastened through the fastening through hole 6 by using the fastening bolt and the fastening nut, at this time, the second layer sealing is completed.

[0039] When the sealing ring in the flange butterfly valve needs to be replaced after long-time use, the fastening bolt and the fastening nut are unscrewed from the flange dynamic disc 3, the flange dynamic disc 3 is reversely rotated, and the left valve body through pipe 1 and the right valve body through pipe 2 are rotated and separated.

[0040] The embodiments in the specification are described in a progressive manner, and each embodiment focuses on the difference from other embodiments, and the same or similar parts of each embodiment can be referred to each other. For the device disclosed by the embodiments, since it corresponds to the method disclosed by the embodiments, the description is relatively simple, and the related parts can be referred to the method part.

[0041] The above description of the disclosed embodiments enables a person skilled in the art to implement or use the utility model. Various modifications of these embodiments will be apparent to those skilled in the art, and the general principles defined herein can be implemented in other embodiments without departing from the spirit or scope of the utility model. Therefore, the utility model will not be limited to these embodiments shown in the text, but will conform to the widest scope consistent with the principles and novel features disclosed herein.

Claims

1. A double-seal flange, characterized in that, The utility model relates to a valve body, which comprises: a left valve body through pipe (1) and a right valve body through pipe (2); the left valve body through pipe (1) and the right valve body through pipe (2) are threadedly connected at the end close to each other, and the connecting part is provided with a limiting ring (7); the left valve body through pipe (1) and the right valve body through pipe (2) are movably connected with a flange static disc (4) at the end away from each other; the left valve body through pipe (1) and the right valve body through pipe (2) are vertically provided with a sliding protruding block (5) along the outer circumference; the flange dynamic disc (3) is sleeved with the sliding protruding block (5) through a sliding groove (8); the flange dynamic disc (3) and the flange static disc (4) are provided with a plurality of through holes (6).

2. The double-seal flange of claim 1, wherein, the flange dynamic disc (3) is further provided with a limiting groove (9) on the side close to the limiting ring (7).

3. The double-seal flange of claim 1, wherein, the limiting ring (7) is further provided with a sealing gasket.

4. The double-seal flange of claim 1, wherein, the through holes (6) on the flange dynamic disc (3) and the flange static disc (4) are staggered.

5. The double-seal flange of claim 1, wherein, the flange static disc (4) is provided with a notch at the position of the through hole of the flange dynamic disc (3).

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