A flange seal structure

Abstract

The utility model provides a kind of flange sealing structure, belong to connection sealing field, including first connecting pipe and second connecting pipe, the top of the first connecting pipe is fixedly installed with the sealing assembly for sealing at junction, locking assembly for assisting sealing is set on the sealing assembly, the first connecting pipe is connected between second connecting pipe by screw thread, the utility model is firmly installed by first flange and first connecting pipe, the stability of overall structure is ensured, sealing pad is embedded in the recess of the top of sealing block, sealing pad can better expand to recess side wall when under pressure, fill microcosmic uneven, enhance sealing effect, annular block further enhances the strength and compression resistance of sealing area, so that it can still maintain reliable sealing effect even in high pressure or vibration environment, to improve the durability of sealing performance.

Description

Technical Field

[0001] This utility model relates to the field of connection sealing, and more specifically, to a flange sealing structure. Background Technology

[0002] A flange connection is a detachable joint in which two pipes, fittings, or equipment are first fixed to a flange, then a flange gasket is placed between the two flanges, and finally the two flanges are tightened with bolts to make them tightly connected. It can realize the connection between stationary pipes and rotating or reciprocating equipment. The flanges are fixed by bolts, and a sealing ring is set between the opposite joint ends of the flanges to improve the sealing performance.

[0003] A search revealed that Chinese patent CN222316246U discloses a "flange sealing structure" comprising a connecting pipe, a flange installed at one end of the connecting pipe, and multiple bolt holes on the flange. A sealing mechanism is provided on one side of the flange, including an O-ring seal and a dovetail-shaped sealing groove on one side of the flange. The seal ring and sealing groove work together. The advantage of the dovetail sealing groove is that the seal ring is less likely to fall off, making it suitable for vertical flange installations. A standard sealing groove has a rectangular cross-section, with the seal ring placed inside, suitable for parallel flange installations. If the flange needs to be installed vertically, the seal ring is prone to falling off. This invention, through the cooperation of the limiting plate and the limiting groove, prevents the bolts from rotating during fixing, thus avoiding loosening of the flange and affecting the sealing effect of the seal ring. However, it still has the following drawbacks:

[0004] Single-layer seals have shortcomings in effectiveness, especially in vertical pipelines with severe vibration or pressure pulsation, where relative rotation can easily occur, leading to seal failure. Single-layer elastic gaskets are also prone to fatigue aging under long-term pressure, further affecting the reliability of the seal.

[0005] Therefore, a flange sealing structure is proposed. Utility Model Content

[0006] The purpose of this invention is to address the shortcomings of existing single-layer seals, particularly the problem that relative rotation can easily occur in vertical pipelines with severe vibration or pressure pulsation, leading to seal failure. This invention provides a flange sealing structure to solve the aforementioned problems.

[0007] To achieve the above-mentioned objectives, this utility model provides the following technical solution:

[0008] The present invention is as follows: a flange sealing structure, including a first connecting pipe and a second connecting pipe, wherein a sealing component for sealing the connection is fixedly installed on the top of the first connecting pipe, and a locking component for auxiliary sealing is provided through the sealing component; the first connecting pipe and the second connecting pipe are connected by threads.

[0009] The sealing assembly includes a first flange fixedly mounted to the top of the first connecting pipe, a sealing block fixedly mounted on the top of the first flange, a groove formed on the top of the sealing block, a sealing gasket installed in the groove, and an annular block fixedly mounted on the top of the first flange.

[0010] As a preferred technical solution of this utility model, the locking assembly includes a second flange fixedly connected to the outside of the second connecting pipe. The bottom of the second flange is provided with an annular groove, which matches the shape of the annular block. A protrusion is provided at the bottom of the second flange, and a spring is fixedly installed at the bottom of the protrusion. A damper is fixedly connected to the other end of the spring.

[0011] As a preferred technical solution of this utility model, a locking block is fixedly installed on the inner side of the first flange, and an installation groove is opened on the inner side of the locking block, and a sealing ring is provided in the installation groove.

[0012] As a preferred technical solution of this utility model, the annular block is provided with limiting holes, and the limiting holes are in three sets and evenly distributed on the outer side of the annular block.

[0013] As a preferred technical solution of this utility model, a through hole is provided on the second flange, the position of the through hole corresponds to the limiting hole, and a limiting pin is provided through the through hole and the limiting hole.

[0014] As a preferred technical solution of this utility model, a locating pin is provided through the first flange and the second flange, and a nut is threadedly connected to the outside of the locating pin.

[0015] As a preferred technical solution of this utility model, the damper consists of six groups evenly distributed in the middle of the annular block and the sealing block, and the protrusion is embedded between the annular block and the sealing block.

[0016] Compared with the prior art, the beneficial effects of this utility model are as follows:

[0017] 1. This mechanism achieves enhanced sealing effect and effectively prevents fluid leakage through the sealing components. Specifically, the stable installation of the first flange and the first connecting pipe ensures the stability of the overall structure. The sealing gasket is embedded in the preset groove on the top of the sealing block, which can achieve a tight fit at the connection. Under pressure, the sealing gasket can expand better towards the side wall of the groove to fill the micro-unevenness. The annular block further enhances the strength and pressure resistance of the sealing area, so that it can maintain a reliable sealing effect even under high pressure or vibration environment.

[0018] 2. This mechanism achieves reliable sealing under dynamic operating conditions through its locking components. Specifically, when the first flange and the second flange are pressed together, the protrusion at the bottom of the second flange is embedded between the annular block and the sealing block, compressing the spring below it. This spring provides continuous elastic pressure, ensuring that the sealing surfaces are always tightly fitted. When vibration or pressure pulsation occurs, the spring will extend and retract accordingly, while the damper generates resistance in the opposite direction of movement, quickly absorbing and dissipating vibration energy, effectively suppressing the reciprocating oscillation of the spring. Attached Figure Description

[0019] Figure 1 A schematic diagram of the flange sealing structure provided by this utility model;

[0020] Figure 2 A cross-sectional structural diagram of the flange sealing structure provided by this utility model;

[0021] Figure 3 A cross-sectional structural diagram of the sealing assembly of the flange sealing structure provided by this utility model;

[0022] Figure 4 A cross-sectional structural diagram of the locking assembly of the flange sealing structure provided by this utility model;

[0023] Figure 5 A schematic diagram of the locking assembly structure of the flange sealing structure provided by this utility model.

[0024] The diagram shows: 1. First connecting pipe; 2. Second connecting pipe; 3. Sealing assembly; 301. First flange; 302. Sealing block; 303. Groove; 304. Sealing gasket; 305. Annular block; 3051. Locking block; 3052. Mounting groove; 3053. Sealing ring; 3054. Limiting hole; 4. Locking assembly; 401. Second flange; 402. Annular groove; 403. Protrusion; 404. Spring; 405. Damper; 4051. Through hole; 4052. Limiting pin; 4053. Positioning pin; 4054. Nut. Detailed Implementation

[0025] To make the objectives, technical solutions, and advantages of the embodiments of this utility model clearer, the technical solutions of the embodiments of this utility model will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some, not all, of the embodiments of this utility model.

[0026] Therefore, the following detailed description of the embodiments of this utility model is not intended to limit the scope of the claimed utility model, but merely to illustrate some embodiments of the utility model. All other embodiments obtained by those skilled in the art based on the embodiments of this utility model without inventive effort are within the scope of protection of this utility model.

[0027] It should be noted that, unless otherwise specified, the embodiments and features and technical solutions in the present invention can be combined with each other.

[0028] It should be noted that similar labels and letters in the following figures indicate similar items. Therefore, once an item is defined in one figure, it does not need to be further defined and explained in subsequent figures.

[0029] like Figures 1-4 As shown, this embodiment proposes a flange sealing structure, including a first connecting pipe 1 and a second connecting pipe 2. A sealing component 3 for sealing the connection is fixedly installed on the top of the first connecting pipe 1. A locking component 4 for auxiliary sealing is provided through the sealing component 3. The first connecting pipe 1 and the second connecting pipe 2 are connected by threads.

[0030] The sealing assembly 3 includes a first flange 301 fixedly mounted to the top of the first connecting pipe 1. A sealing block 302 is fixedly mounted on the top of the first flange 301. A groove 303 is formed on the top of the sealing block 302, and a sealing gasket 304 is installed in the groove 303. An annular block 305 is fixedly mounted on the top of the first flange 301. The stable installation of the first flange 301 and the first connecting pipe 1 ensures the stability of the overall structure. The sealing gasket 304 is embedded in the groove 303 on the top of the sealing block 302, which allows for a tight fit at the connection. Under pressure, the sealing gasket 304 can expand better towards the sidewall of the groove 303, filling microscopic unevenness and enhancing the sealing effect, effectively preventing fluid leakage. The annular block 305 further enhances the strength and pressure resistance of the sealing area, enabling it to maintain a reliable sealing effect even under high pressure or vibration environments, thereby improving the durability of the sealing performance and reducing maintenance frequency and cost.

[0031] like Figures 1-5As shown, the locking assembly 4 includes a second flange 401 fixedly connected to the outside of the second connecting pipe 2. The bottom of the second flange 401 has an annular groove 402 that matches the shape of the annular block 305. A protrusion 403 is provided at the bottom of the second flange 401, and a spring 404 is fixedly installed at the bottom of the protrusion 403. A damper 405 is fixedly connected to the other end of the spring 404. When the first flange 301 and the second flange 401 are pressed together, the protrusion 403 at the bottom of the second flange 401 embeds between the annular block 305 and the sealing block 302, compressing the spring 404 below it. The spring 404 provides continuous elastic pressure, ensuring that the sealing surfaces are always tightly fitted. When vibration or pressure pulsation occurs, the spring 404 expands and contracts accordingly, while the damper 405 generates resistance in the opposite direction of movement, quickly absorbing and dissipating vibration energy, effectively suppressing the reciprocating oscillation of the spring 404, thereby greatly improving the sealing reliability under dynamic operating conditions.

[0032] like Figures 1-4 As shown, a retaining block 3051 is fixedly installed on the inner side of the first flange 301. An installation groove 3052 is formed on the inner side of the retaining block 3051, and a sealing ring 3053 is installed within the installation groove 3052. The sealing ring 3053 within the retaining block 3051 forms a tight radial seal with the outer wall of the second connecting pipe 2, constituting a second line of defense independent of the main flange sealing surface. Even if the main flange sealing surface fails due to extreme conditions, the inner sealing ring 3053 can still provide a barrier, greatly reducing the risk of leakage and more effectively dealing with media penetration from different directions.

[0033] like Figure 3 As shown, the annular block 305 has three sets of limiting holes 3054 evenly distributed on its outer side. Operators can quickly install the device based on the precise position of the limiting holes 3054 without additional adjustments, greatly improving installation efficiency.

[0034] like Figures 2-5 As shown, the second flange 401 has a through hole 4051, which corresponds to the limiting hole 3054. A limiting pin 4052 is inserted through the through hole 4051 and the limiting hole 3054. After the first flange 301 and the second flange 401 are initially aligned with the groove 303 by the annular block 305, the limiting pin 4052 is inserted into the corresponding through hole 4051 and the limiting hole 3054 to fix and lock them in place, preventing relative rotation due to torque and vibration during operation and ensuring the absolute stability of the connection structure.

[0035] like Figures 2-5As shown, locating pins 4053 are installed through the first flange 301 and the second flange 401, and nuts 4054 are threadedly connected to the outer side of the locating pins 4053. The locating pins 4053 first pass through corresponding pin holes on the first flange 301 and the second flange 401 to achieve precise positioning. Then, the nuts 4054 are tightened to apply a huge axial clamping force. The locating pins 4053 not only enhance the connection accuracy between the first flange 301 and the second flange 401, but also effectively prevent misalignment caused by external forces.

[0036] like Figures 2-5 As shown, six sets of dampers 405 are evenly distributed between the annular block 305 and the sealing block 302, with protrusions 403 embedded between the annular block 305 and the sealing block 302. The dampers 405 can effectively absorb and disperse the vibration energy generated during operation, thereby reducing the dynamic response of the entire structure. The even distribution of the six sets of dampers 405 ensures balanced force distribution and avoids sealing failure caused by local stress concentration.

[0037] Specifically, in use, the sealing structure of this flange is as follows: the sealing gasket 304 is embedded in the pre-set groove 303 on the top of the sealing block 302, which can achieve a tight fit at the connection. Under pressure, the sealing gasket 304 can better expand towards the side wall of the groove 303, filling the micro-unevenness and enhancing the sealing effect, effectively preventing fluid leakage. The annular block 305 further enhances the strength and pressure resistance of the sealing area, so that it can maintain a reliable sealing effect even under high pressure or vibration environment. When the first flange 301 and the second flange 401 are pressed together, the protrusion 403 at the bottom of the second flange 401 is embedded between the annular block 305 and the sealing block 302, and compresses the spring 404 below it. Providing continuous elastic pressure ensures that the sealing surface is always tightly fitted. When vibration or pressure pulsation occurs, the spring 404 will extend and retract accordingly, while the damper 405 generates resistance in the opposite direction of movement, quickly absorbing and dissipating vibration energy, effectively suppressing the reciprocating oscillation of the spring 404, thereby greatly improving the sealing reliability under dynamic working conditions. The sealing ring 3053 inside the locking block 3051 forms a tight radial seal with the outer wall of the second connecting pipe 2, constituting a second line of defense independent of the main flange sealing surface. Even if the main flange sealing surface fails due to extreme conditions, the inner sealing ring 3053 can still provide a barrier, greatly reducing the risk of leakage and more effectively dealing with media penetration from different directions.

[0038] All technical features in this embodiment can be freely combined according to actual needs.

[0039] The above embodiments are preferred implementations of this utility model. In addition, this utility model can also be implemented in other ways. Any obvious substitutions without departing from the concept of this technical solution are within the protection scope of this utility model.

Claims

1. A flange sealing structure, comprising a first connecting pipe (1) and a second connecting pipe (2), characterized in that, A sealing component (3) for sealing the connection is fixedly installed on the top of the first connecting pipe (1). A locking component (4) for auxiliary sealing is provided through the sealing component (3). The first connecting pipe (1) and the second connecting pipe (2) are connected by threads. The sealing assembly (3) includes a first flange (301) fixedly installed on the top of the first connecting pipe (1), a sealing block (302) fixedly installed on the top of the first flange (301), a groove (303) is provided on the top of the sealing block (302), a sealing gasket (304) is installed in the groove (303), and an annular block (305) is fixedly installed on the top of the first flange (301).

2. The flange sealing structure according to claim 1, characterized in that, The locking assembly (4) includes a second flange (401) fixedly connected to the outside of the second connecting pipe (2). The bottom of the second flange (401) is provided with an annular groove (402), which matches the shape of the annular block (305). The bottom of the second flange (401) is provided with a protrusion (403), and a spring (404) is fixedly installed at the bottom of the protrusion (403). The other end of the spring (404) is fixedly connected to a damper (405).

3. The flange sealing structure according to claim 1, characterized in that, A locking block (3051) is fixedly installed on the inner side of the first flange (301), and an installation groove (3052) is provided on the inner side of the locking block (3051), and a sealing ring (3053) is provided in the installation groove (3052).

4. The flange sealing structure according to claim 1, characterized in that, The annular block (305) has a limiting hole (3054), and the limiting hole (3054) is in three groups and is evenly distributed on the outside of the annular block (305).

5. A flange sealing structure according to claim 2, characterized in that, The second flange (401) has a through hole (4051) and the position of the through hole (4051) corresponds to the limiting hole (3054). A limiting pin (4052) is provided through the through hole (4051) and the limiting hole (3054).

6. A flange sealing structure according to claim 2, characterized in that, A locating pin (4053) is provided through the first flange (301) and the second flange (401), and a nut (4054) is threadedly connected to the outside of the locating pin (4053).

7. A flange sealing structure according to claim 2, characterized in that, The dampers (405) are arranged in six groups and are evenly distributed in the middle of the annular block (305) and the sealing block (302). The protrusions (403) are embedded between the annular block (305) and the sealing block (302).

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