Self-tightening connecting flange

Abstract

The utility model relates to the technical field of flanges, in particular to a self-tightening connecting flange which comprises a flange plate, a plurality of bolt holes are formed in the surface of the flange plate, edge grooves are formed in the two sides of the flange plate, a sealing backing ring is arranged in one edge groove in a sleeved mode, and a rubber connecting piece is integrally formed on the outer ring face of the sealing backing ring. One end of the rubber connecting piece is integrally formed on the surface of the rubber sleeve, and the rubber sleeve sleeves the outer ring of the flange plate; the self-tightening connecting flange has the advantages that the edge grooves are formed in the two sides of the flange plates, the sealing backing ring is arranged in one edge groove in a sleeved mode, when the two flange plates are connected through bolts, the sealing backing ring is tightly squeezed, and therefore the sealing effect between the two flange plates is obviously improved.

Description

Technical Field

[0001] The utility model relates to the field of flanges, and specifically to a self-tightening connecting flange. Background Art

[0002] In traditional pipeline connection systems, flange connection is a common connection method. It tightly connects two flange plates together through bolts to achieve the connection of pipelines or equipment. However, there are some problems with the sealing performance of traditional flange connections. Especially in working environments with high pressure, high temperature or corrosive media, leakage is likely to occur at the flange connection, which not only affects the normal operation of the system but also may pose a safety hazard.

[0003] Existing flange connection structures often rely on sealing gaskets or sealing rings between flange plates to achieve the sealing effect. However, these sealing elements are prone to aging, deformation or detachment under the influence of long-term use or external factors such as pressure and temperature changes, resulting in sealing failure. In addition, traditional sealing rings often require additional fixing measures during installation, such as adhesives or additional fasteners, which not only increase the installation difficulty but also may introduce new leakage risks. Summary of the Utility Model

[0004] The purpose of the utility model is to provide a self-tightening connecting flange to solve the problems raised in the above background art.

[0005] To achieve the above purpose, the utility model provides the following technical solution: A self-tightening connecting flange includes a flange plate. Multiple bolt holes are provided on the surface of the flange plate. Edge grooves are provided on both sides of the flange plate. A sealing ring is sleeved inside one edge groove. A rubber connecting piece is integrally formed on the outer ring surface of the sealing ring. One end of the rubber connecting piece is integrally formed on the surface of a rubber sleeve, and the rubber sleeve is sleeved on the outer ring of the flange plate.

[0006] Preferably, the edge groove is an annular groove. The outer diameter of the edge groove is equal to the outer diameter of the flange plate, and the inner diameter of the edge groove is greater than the inner diameter of the flange plate. The bolt holes communicate with the two edge grooves.

[0007] Preferably, the sealing ring is in an annular plate-like structure. The inner diameter of the sealing ring is equal to the inner diameter of the edge groove, and the thickness of the sealing ring is greater than the depth of the edge groove.

[0008] Preferably, the rubber connecting pieces correspond to the bolt holes one by one. The width of the rubber connecting piece is greater than the diameter of the bolt hole, and a reserved hole is provided on the surface of the rubber connecting piece.

[0009] Preferably, a rubber plug ring is integrally formed inside the reserved hole. One end of the rubber plug ring is inserted into the bolt hole, and the outer diameter of the rubber plug ring is equal to the diameter of the bolt hole.

[0010] Preferably, the rubber sleeve has an annular plate structure with an "L"-shaped cross-section, and the annular plate of the rubber sleeve blocks the side of the flange away from the gasket ring.

[0011] Compared with the prior art, the beneficial effects of the present utility model are as follows:

[0012] The self-tightening connecting flange proposed by the present utility model has side grooves opened on both sides of the flange, and a gasket ring is sleeved in one of the side grooves. When the two flanges are connected by bolts, the gasket ring is tightly squeezed, thereby significantly improving the sealing effect between the two flanges. This self-tightening design can maintain stable sealing performance under different working conditions and effectively prevent leakage. A rubber connecting piece is integrally formed on the outer ring surface of the gasket ring, and a rubber plug ring is provided on the rubber connecting piece. When the bolt passes through the bolt hole, the rubber plug ring is clamped between the bolt and the bolt hole, effectively avoiding the shaking of the bolt in the bolt hole and enhancing the stability of the bolt connection. BRIEF DESCRIPTION OF THE DRAWINGS

[0013] Figure 1 is a schematic structural diagram of the present utility model;

[0014] Figure 2 is a schematic structural diagram of the back of the present utility model;

[0015] Figure 3 is a front view of the structure of the present utility model;

[0016] Figure 4 is Figure 3 a sectional view of the structure at A-A in

[0017] Figure 5 is a schematic structural diagram of the connection between the gasket ring and the rubber sleeve of the present utility model.

[0018] In the figure: flange 1, bolt hole 2, side groove 3, gasket ring 4, rubber connecting piece 5, rubber sleeve 6,

[0019] reserved hole 7, rubber plug ring 8. DETAILED DESCRIPTION OF THE EMBODIMENTS

[0020] In order to clearly and completely describe the objectives, technical solutions of the present utility model, and make the advantages more clearly understood, the following further details the embodiments of the present utility model with reference to the accompanying drawings. It should be understood that the specific embodiments described herein are some, but not all, of the embodiments of the present utility model, and are only used to explain the embodiments of the present utility model, rather than to limit the embodiments of the present utility model. All other embodiments obtained by those of ordinary skill in the art without creative efforts fall within the scope of protection of the present utility model.

[0021] Please refer to Figures 1 - 5, the present utility model provides a technical solution: a self - tight connecting flange, including a flange plate 1. A plurality of bolt holes 2 are provided on the surface of the flange plate 1. Side grooves 3 are provided on both sides of the flange plate 1. The side grooves 3 are annular grooves. The outer ring diameter of the side groove 3 is equal to the outer ring diameter of the flange plate 1, and the inner ring diameter of the side groove 3 is greater than the inner ring diameter of the flange plate 1. The bolt holes 2 communicate with the two side grooves 3. A sealing gasket ring 4 is sleeved inside one side groove 3. The sealing gasket ring 4 is in an annular plate - like structure. The inner ring diameter of the sealing gasket ring 4 is equal to the inner ring diameter of the side groove 3, and the thickness of the sealing gasket ring 4 is greater than the depth of the side groove 3. The sealing gasket ring 4 is sleeved in the side groove 3 on the side of the flange plate 1 facing the structure to be connected. It can be understood that after the close - end portions of two pipes to be connected are both sleeved and fixed with the flange plate 1, the sealing gasket ring 4 is sleeved and fixed on the side grooves 3 on the opposite sides of the two flange plates 1. Then, bolts are passed through the bolt holes 2 on the surfaces of the two flange plates 1 and tightened. The sealing gasket ring 4 between the two flange plates 1 is tightly squeezed, improving the sealing effect between the two flange plates 1.

[0022] A rubber connecting piece 5 is integrally formed on the outer ring surface of the sealing gasket ring 4. The rubber connecting pieces 5 and the bolt holes 2 are in one - to - one correspondence. The width of the rubber connecting piece 5 is greater than the aperture of the bolt hole 2. A reserved hole 7 is provided on the surface of the rubber connecting piece 5. A rubber plug ring 8 is integrally formed inside the reserved hole 7. One end of the rubber plug ring 8 is inserted into the bolt hole 2. The outer ring diameter of the rubber plug ring 8 is equal to the aperture of the bolt hole 2. The reason for adding the rubber plug ring 8 on the surface of the rubber connecting piece 5 is that when the rubber plug ring 8 is inserted into the bolt hole 2, when the bolt passes through the bolt hole 2, the rubber plug ring 8 is clamped between the bolt and the bolt hole 2, preventing the bolt from shaking in the bolt hole 2.

[0023] One end of the rubber connecting piece 5 is integrally formed on the surface of a rubber sleeve 6. The rubber sleeve 6 is sleeved on the outer ring of the flange plate 1. The rubber sleeve 6 is in a circular ring plate structure with a cross - section of "L". The ring plate of the rubber sleeve 6 blocks on the side of the flange plate 1 away from the sealing gasket ring 4. The reason for sleeving the rubber sleeve 6 on the outside of the flange plate 1 is that the rubber sleeve 6 cooperates with the rubber connecting piece 5 to pull the sealing gasket ring 4, forming a sealing structure sleeved on the flange plate 1, without bonding and without the problem of falling off.

[0024] Although the embodiments of the present utility model have been shown and described, for those of ordinary skill in the art, it can be understood that various changes, modifications, substitutions, and variations can be made to these embodiments without departing from the principle and spirit of the present utility model. The scope of the present utility model is defined by the appended claims and their equivalents.

Claims

1. A self-tightening connection flange, comprising a flange plate (1), a surface of the flange plate (1) being provided with a plurality of bolt holes (2), characterized in that: Side grooves (3) are provided on both sides of the flange (1), a sealing gasket (4) is sleeved inside one of the side grooves (3), a rubber connecting piece (5) is integrally formed on the outer ring surface of the sealing gasket (4), one end of the rubber connecting piece (5) is integrally formed on the surface of a rubber sleeve (6), and the rubber sleeve (6) is sleeved on the outer ring of the flange (1).

2. A self-tightening connection flange according to claim 1, characterized in that: The side groove (3) is an annular groove, the outer ring diameter of the side groove (3) is equal to the outer ring diameter of the flange (1), the inner ring diameter of the side groove (3) is larger than the inner ring diameter of the flange (1), and the bolt hole (2) connects the two side grooves (3).

3. A self-tightening connection flange according to claim 1, characterized in that: The sealing gasket ring (4) is an annular plate-shaped structure, the inner ring diameter of the sealing gasket ring (4) is equal to the inner ring diameter of the side groove (3), and the thickness of the sealing gasket ring (4) is greater than the depth of the side groove (3).

4. A self-tightening connection flange according to claim 1, characterized in that: The rubber connecting piece (5) and the bolt hole (2) correspond one to one, the width of the rubber connecting piece (5) is greater than the diameter of the bolt hole (2), and a reserved hole (7) is provided on the surface of the rubber connecting piece (5).

5. A self-tightening connection flange according to claim 4, characterized in that: A rubber plug ring (8) is integrally formed inside the reserved hole (7), one end of the rubber plug ring (8) is inserted into the bolt hole (2), and the outer ring diameter of the rubber plug ring (8) is equal to the hole diameter of the bolt hole (2).

6. A self-tightening connection flange according to claim 1, characterized in that: The rubber sleeve (6) is a circular ring plate structure with an L-shaped cross section, and the ring plate of the rubber sleeve (6) blocks the side of the flange (1) away from the sealing gasket (4).

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