Pipeline flange connection double-seal anti-leakage structure
By adopting a double seal anti-leakage structure at the pipe flange connection, and using wedge-shaped, arc-shaped or T-shaped water-facing surface and flexible gaskets, the leakage problem of existing flange connections under frequent high pressure and pressure fluctuations is solved, achieving better earthquake resistance and leakage resistance, and reducing operating costs.
Patent Information
- Application Number
- CN202421432433.X
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-06-21
- Publication Date
- 2025-03-14
- Estimated Expiration
- 2034-06-21
AI Technical Summary
Existing pipe flange connections are prone to leakage under high pressure and frequent pressure fluctuations, resulting in high maintenance and high cost.
The double seal anti-leakage structure is adopted. By setting a wedge-shaped, arc-shaped or T-shaped water-facing surface on the inside of the flange gasket, and combining a flexible gasket and a specific projection and groove design, the contact force between the flange gasket and the flange is enhanced to achieve a double sealing effect.
It effectively reduces leakage at the flange connection of the pipeline system, enhances the system's earthquake resistance and leakage resistance, and reduces the cost and cost of the operation stage.
Smart Images
Figure CN222616276U_ABST
Abstract
Description
Technical Field
[0001] The utility model relates to the technical field of pipeline flange connection, in particular to a pipeline flange connection double sealing anti-leakage structure. Background Art
[0002] During the operation phase of construction and industrial electromechanical engineering, there are often leaks at the flange connections of pipelines or equipment, which are difficult and costly to repair, and may even require the system to be stopped for repair, increasing the expenses and costs of the operation phase of construction and industrial engineering.
[0003] The fundamental reason for leakage in flange connection is that the sealing of flange is achieved by filling the gap between the joints of two flanges by the deformation of gaskets under the tightening force of bolts and nuts. When there are more bolts in the flange connection of large diameter pipelines and the working pressure of the medium in the pipeline is high or the pressure fluctuation is frequent, the following situations are likely to cause leakage at the flange connection: 1) The tightening force error of individual bolts is large; 2) The parallelism error of the flange is high; 3) The machining accuracy of the flange sealing surface is low; 4) The flange gasket undergoes large plastic deformation or aging under long-term compression; 5) The flange connection bolts undergo plastic deformation after being pulled for a long time, and the firmness is reduced; 6) There are vibrations, water pressure fluctuations, and intermittent system operation during flange operation. Summary of the invention
[0004] In view of the above-mentioned prior art, the utility model proposes a pipeline flange connection double sealing anti-leakage structure.
[0005] The utility model provides a pipeline flange connection double sealing anti-leakage structure, comprising a left flange and a right flange, an annular flange gasket is arranged between the left flange and the right flange, the inner side of the flange gasket has a water-facing surface, the water-facing surface is set to a wedge shape or the water-facing surface is set to an arc shape or the vertical section of the flange gasket is set to a T shape.
[0006] Preferably, when the vertical section of the flange gasket is set to be T-shaped, protrusions are provided along the circumference of the inner ends of both sides of the flange gasket, and grooves matching the protrusions are provided on the left flange and the right flange.
[0007] Preferably, the protrusion is configured to be semi-U-shaped, and the groove is configured to be wedge-shaped.
[0008] Preferably, the flange gasket is a flexible gasket.
[0009] Compared with the prior art, the beneficial effects of the utility model are as follows: the utility model provides a double-sealed anti-leakage structure for pipe flange connection, which can reduce leakage at the flange connection of the pipe system during the operation of construction and industrial electromechanical engineering, especially large-diameter pipes, and enhance the reliability of system operation, reduce the expenses and costs during the project operation stage, solve the disadvantages of traditional flange connection, make the flange connection have better earthquake resistance and leakage resistance, and reduce the easy leakage of pipes under conditions where the medium pressure of the pipe system fluctuates frequently or the system operates intermittently. BRIEF DESCRIPTION OF THE DRAWINGS
[0010] Figure 1 It is a structural schematic diagram of the first embodiment of the utility model.
[0011] Figure 2 It is a structural schematic diagram of the second embodiment of the utility model.
[0012] Figure 3 It is a schematic structural diagram of the third embodiment of the utility model.
[0013] In the figure: 1. Left flange; 2. Right flange; 3. Flange gasket; 4. Water-facing surface; 5. Protrusion; 6. Groove. DETAILED DESCRIPTION
[0014] In order to make the technical means, creative features, objectives and effects achieved by the present invention easy to understand, the present invention is further described below with reference to specific illustrations.
[0015] A pipeline flange connection double sealing anti-leakage structure comprises a left flange 1 and a right flange 2, an annular flange gasket 3 is arranged between the left flange 1 and the right flange 2, the flange gasket 3 is a flexible gasket, and the inner side of the flange gasket 3 has a water-facing surface 4.
[0016] In the first embodiment, if Figure 1 As shown, the water facing surface 4 is configured to be wedge-shaped.
[0017] In the second embodiment, if Figure 2 As shown, the water facing surface 4 is arranged in an arc shape.
[0018] In the third embodiment, if Figure 3 As shown, the vertical section of the flange gasket 3 is set to be T-shaped. Specifically, the inner ends of both sides of the flange gasket 3 are provided with protrusions 5 along the periphery thereof, and the left flange 1 and the right flange 2 are provided with grooves 6 that match the protrusions 5. Further, the protrusion 5 is set to be semi-U-shaped, and the groove 6 is set to be wedge-shaped, and the protrusion 5 can be placed in the groove 6.
[0019] When utilizing the original seal of the flange connection, the anti-leakage structure optimizes the shape of the water-facing surface 4 of the flange gasket 3 or the shape of the body of the flange gasket 3, and utilizes the medium fluid pressure in the pipeline to react on the flange gasket 3, so that the flange gasket 3 and the flange are in close contact, thereby achieving the effect that the greater the medium fluid pressure in the pipeline, the greater the contact pressure between the flange gasket 3 and the flange, and the better the seal, thereby achieving a double sealing effect, solving the drawbacks of traditional flange connections, making the flange connection have better anti-seismic and anti-leakage properties, and reducing the situation where the pipeline is prone to leakage when the medium pressure of the pipeline system fluctuates greatly or the system operates intermittently.
[0020] The above are only implementation methods of the present utility model, and are not intended to limit the patent scope of the present utility model. Any equivalent structure made using the contents of the specification and drawings of the present utility model, directly or indirectly used in other related technical fields, are also within the patent protection scope of the present utility model.
Claims
1. A double-sealed anti-leakage structure for pipe flange connection, characterized in that: It comprises a left flange and a right flange, wherein an annular flange gasket is arranged between the left flange and the right flange, wherein the inner side of the flange gasket has a water-facing surface, wherein the water-facing surface is arranged in a wedge shape or the water-facing surface is arranged in an arc shape or the vertical section of the flange gasket is arranged in a T shape.
2. The double sealing anti-leakage structure for pipe flange connection according to claim 1, characterized in that: When the vertical section of the flange gasket is set to be T-shaped, protrusions are set along the circumference of the inner ends of both sides of the flange gasket, and grooves matching with the protrusions are set on the left flange and the right flange.
3. The double sealing anti-leakage structure for pipe flange connection according to claim 2, characterized in that: The protrusion is configured to be semi-U-shaped, and the groove is configured to be wedge-shaped.
4. The double sealing anti-leakage structure for pipe flange connection according to any one of claims 1 to 3, characterized in that: The flange gasket is a flexible gasket.