Pressure-resistant structure of connecting flange

Abstract

The utility model discloses a kind of connecting flange pressure resistance structure, it is related to connecting flange field, including two pipelines, the bottom end of the pipeline in one side is equipped with first flange, the top end of the pipeline in other side is equipped with second flange, the outside of first flange and second flange is fixedly connected with support ring, reinforcing rib is installed between the support ring and pipeline;The inside of first flange is equipped with sealing groove, the top of second flange is equipped with sealing ring, and the sealing ring is movably abutted in the inside of sealing groove;The inside of first flange is provided with the decompression mechanism for the decompression of sealing ring.When pipeline pressure rises, pressure acts on piston plate through pressure hole, piston plate extrudes first spring and drives sliding column to slide, so that the pressure that piston plate exerts to sealing ring reduces, the decompression of sealing ring is realized, avoid its deformation or damage due to excessive pressure, effectively prolong the service life of sealing ring.

Description

Technical Field

[0001] This utility model relates to the field of connecting flange technology, specifically a pressure-resistant structure for connecting flanges. Background Technology

[0002] A flange is a part that connects shafts to each other. It is usually used to connect pipes, fittings or equipment. It is a detachable connection and one of the important connection methods in pipeline construction. Flanges are easy to use and can withstand high pressure. They are widely used in many industries such as chemical, petrochemical, fire protection, drainage and industrial pipelines.

[0003] For example, patent CN219588349U discloses a large-diameter pipe connection flange structure, including a disassembly and assembly mechanism. By pulling the clamp rod, the clamp rod disengages from the circular groove, then the circular block is inserted into the circular groove, and the clamp rod is released to allow it to be inserted into the inside of the circular groove. At this time, the clamp rod is located above the circular block and fixes it, thereby completing the installation purpose and achieving the purpose of convenient and quick pipe connection. By setting a sealing groove and a sealing ring, the connection between flange one and flange two can have good sealing performance, achieving the purpose of preventing leakage. When using flanges to connect pipes, liquids or other substances usually flow inside the pipes. These substances have different properties, states, and characteristics. Liquid substances usually have a certain density and fluidity, and will generate a certain pressure when flowing in the pipe. Under the action of these pressures, the sealing ring is prone to deformation, resulting in reduced sealing performance and liquid leakage.

[0004] To address the aforementioned issues, an innovative design is urgently needed based on the existing connecting flange. Utility Model Content

[0005] The purpose of this utility model is to provide a pressure-resistant structure for connecting flanges to solve the problems mentioned in the background art, such as the fact that liquids or other substances usually flow in pipelines, and these substances have different properties, states and characteristics. Liquid substances usually have a certain density and fluidity, and will generate a certain pressure when flowing in pipelines. Under the action of these pressures, the sealing ring is prone to deformation, resulting in reduced sealing performance and liquid leakage.

[0006] To achieve the above objectives, this utility model provides the following technical solution: a pressure-resistant structure for connecting flanges, comprising two pipes, a first flange installed at the bottom end of one pipe and a second flange installed at the top end of the other pipe, a support ring fixedly connected to the outer side of both the first flange and the second flange, and a reinforcing rib installed between the support ring and the pipe.

[0007] The first flange has a sealing groove inside, and the second flange has a sealing ring installed on its top, which movably abuts against the inside of the sealing groove.

[0008] The first flange is equipped with a pressure-reducing mechanism for reducing the pressure on the sealing ring.

[0009] Furthermore, the pressure reducing mechanism includes a piston plate that is slidably connected to the inside of the first flange. The sealing groove has pressure holes corresponding to its number on the side near the piston plate. A first spring is installed on one side of the piston plate. A sliding column is sleeved inside the first spring. One end of the sliding column is fixedly connected to the piston plate. The piston plate moves against the sealing ring.

[0010] Furthermore, the support mechanism includes a lever, which is rotatably connected to the inside of the first flange. One end of the lever is rotatably connected to a support arm, and one end of the support arm is fixedly connected to an auxiliary support block. A second spring is installed between one end of the lever and the first flange, and the lever is in movable contact with the sliding column.

[0011] Furthermore, wedge-shaped recesses are installed on both sides of the bottom of the first flange, and drive screws are threaded to both sides inside the second flange, with wedge-shaped protrusions rotatably connected to the ends of the drive screws.

[0012] Furthermore, the number of levers corresponds to the number of piston plates.

[0013] Compared with the prior art, the beneficial effects of this utility model are:

[0014] This pressure-resistant flange structure allows for pressure relief when the pressure inside the pipeline increases. The pressure is applied to the piston plate through the pressure hole, which in turn compresses the first spring and causes the sliding column to slide, reducing the pressure exerted by the piston plate on the sealing ring. This reduces the pressure on the sealing ring, preventing it from deforming or being damaged due to excessive pressure and effectively extending its service life.

[0015] Furthermore, when the pressure inside the pipeline changes, the support mechanism can support the sealing ring. When the sliding column contacts the lever and causes it to rotate, the lever squeezes the second spring, causing the support arm to move the auxiliary support block closer to the sealing ring and support it, ensuring that the sealing ring maintains a stable sealing state when under pressure, thus enhancing the stability of the seal.

[0016] Furthermore, when connecting the two flanges, the wedge-shaped recess on the first flange is inserted into the interior of the second flange. By rotating the drive screw, the wedge-shaped protrusion moves, causing the wedge-shaped protrusion to gradually abut against the wedge-shaped recess. The cooperation between the wedge-shaped protrusion and the wedge-shaped recess effectively restricts the vertical displacement of the first flange, making the connection between the two flanges more stable and thus improving the pressure resistance of the entire connection structure. Attached Figure Description

[0017] Figure 1This is a schematic diagram of the overall three-dimensional structure of this utility model.

[0018] Figure 2 This is a partial three-dimensional structural diagram of the present invention.

[0019] Figure 3 This is a cross-sectional three-dimensional structural diagram of the first and second flanges of this utility model.

[0020] Figure 4 This is a three-dimensional structural diagram of the support mechanism of this utility model.

[0021] Figure 5 This utility model Figure 3 A magnified three-dimensional structural diagram of A in the middle.

[0022] Figure 6 This utility model Figure 3 A magnified three-dimensional structural diagram of B.

[0023] In the diagram: 1. Pipe; 2. First flange; 3. Second flange; 4. Reinforcing rib; 5. Sealing groove; 6. Sealing ring; 7. Piston plate; 8. Support ring; 9. First spring; 10. Sliding column; 11. Lever; 12. Support arm; 13. Auxiliary support block; 14. Second spring; 15. Drive screw; 16. Wedge-shaped protrusion; 17. Wedge-shaped concave block. Detailed Implementation

[0024] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0025] Example 1: Please refer to Figures 1-6The present invention provides the following technical solution: a pressure-resistant structure for a connecting flange, comprising two pipes 1, a first flange 2 installed at the bottom end of one pipe 1, and a second flange 3 installed at the top end of the other pipe 1, both the first flange 2 and the second flange 2 being fixedly connected to the outer side of the latter, and a reinforcing rib 4 installed between the support ring 8 and the pipe 1; a sealing groove 5 is provided inside the first flange 2, and a sealing ring 6 is installed at the top of the second flange 3, the sealing ring 6 being movably abutting against the inside of the sealing groove 5; a pressure-reducing mechanism for reducing pressure on the sealing ring 6 is provided inside the first flange 2; the pressure-reducing mechanism includes a piston plate 7, the piston plate 7 being slidably connected to the inside of the first flange 2, and pressure holes corresponding to the number of holes being provided on the side of the sealing groove 5 near the piston plate 7; a first spring 9 is installed on one side of the piston plate 7, and a sliding column 10 is sleeved inside the first spring 9, one end of the sliding column 10 being fixedly connected to the piston plate 7, and the piston plate 7 being movably abutting against the sealing ring 6;

[0026] In use, the support ring 8 is fixed to the outside of the first flange 2 and the second flange 3, while the reinforcing rib 4 is installed between the support ring 8 and the pipe 1. The reinforcing rib 4 can enhance the structural strength of the connection between the flange and the pipe 1 and improve the overall pressure resistance. The sealing groove 5 inside the first flange 2 cooperates with the sealing ring 6 on the top of the second flange 3. When the two flanges are connected, the sealing ring 6 moves against the inside of the sealing groove 5 to play a sealing role and prevent fluid leakage in the pipe 1. When the pressure in the pipe 1 increases, the pressure acts on the piston plate 7 through the pressure hole set on the sealing groove 5. At this time, the piston plate 7 presses the first spring 9 outward under the pressure, so that the first spring 9 and the piston plate 7 slide inside the first flange 2. At this time, the first spring 9 is compressed, thereby driving the sliding column 10 to slide inside the first flange 2, guiding the movement of the piston plate 7 and preventing its movement path from deviating. The sliding of the piston plate 7 reduces the pressure applied to the sealing ring 6, thereby reducing the pressure on the sealing ring 6 and preventing the sealing ring 6 from deforming or being damaged due to excessive pressure, thus extending the service life of the sealing ring 6.

[0027] Example 2: Based on Example 1, a support mechanism is also disclosed, the specific structure of which is as follows:

[0028] The support mechanism includes a ring of levers 11, which are rotatably connected to the inside of the first flange 2. One end of the lever 11 is rotatably connected to a support arm 12, and one end of the support arm 12 is fixedly connected to an auxiliary support block 13. A second spring 14 is installed between one end of the lever 11 and the first flange 2. The lever 11 is in movable contact with the sliding column 10. Wedge-shaped recesses 17 are installed on both sides of the bottom of the first flange 2. Drive screws 15 are threadedly connected to both sides of the inside of the second flange 3. Wedge-shaped protrusions 16 are rotatably connected to the end of the drive screws 15. The number of levers 11 corresponds to the number of piston plates 7.

[0029] When the pressure inside pipe 1 changes, the sealing ring 6 needs to be supported to ensure that it maintains a stable sealing state under pressure, thus improving the sealing effect and pressure resistance. When the piston plate 7 drives the sliding column 10 to slide under pressure, the sliding column 10 slides inside the first flange 2. When the sliding column 10 slides to contact the lever 11, it drives the lever 11 to rotate at its rotation point. When the lever 11 rotates, one end of it simultaneously compresses the second spring 14, causing the second spring 14 to be compressed. At the same time, one end of the lever 11 is also rotatably connected to the support arm 12. When the lever 11 rotates, the shaft on the support arm 12 rotates on the lever 11, causing the support arm 12 to move. The auxiliary support block 13 at one end of the support arm 12 moves closer to the sealing ring 6 under the action of the support arm 12 and supports it. When the pressure inside pipe 1 decreases, the piston plate 7 resets under the action of the first spring 9, so that the lever 11 no longer compresses the second spring 14. After the lever 11 is released from its compression, it resets, causing the auxiliary support block 13 to move away from the sealing ring 6. In this way, the support mechanism provides support for the sealing ring 6 when the pressure changes in the pipeline 1, enhancing the stability of the seal. When it is necessary to fix the first flange 2 and the second flange 3, the wedge-shaped recess 17 on the first flange 3 is first inserted into the interior of the second flange 3. Then, by rotating the drive screw 15, since the drive screw 15 is threadedly connected to the second flange 3, the drive screw 15 will move laterally in a straight line inside the second flange 3. The end of the drive screw 15 is fixedly connected to a wedge-shaped protrusion 16. Therefore, after the drive screw 15 moves, it will drive the wedge-shaped protrusion 16 at its end to move, so that the wedge-shaped protrusion 16 gradually moves towards the wedge-shaped recess 17 until the wedge-shaped protrusion 16 and the inclined surface on the wedge-shaped recess 17 abut against each other. This allows the second flange 3 to restrict the vertical displacement of the first flange 2, achieving fixation between the two flanges and further improving the pressure resistance of the entire connection structure.

[0030] In the description of this utility model, it should be noted that, unless otherwise explicitly specified and limited, the terms "connected" and "linked" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium. Those skilled in the art can understand the specific meaning of the above terms in this utility model based on the specific circumstances.

[0031] 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 make equivalent substitutions for some of the technical features. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the present invention should be included within the protection scope of the present invention.

Claims

1. A pressure-resistant structure for a connecting flange, comprising two pipes (1), characterized in that: A first flange (2) is installed at the bottom of the pipe (1) on one side, and a second flange (3) is installed at the top of the pipe (1) on the other side. Support rings (8) are fixedly connected to the outer sides of the first flange (2) and the second flange (3). Reinforcing ribs (4) are installed between the support rings (8) and the pipe (1). The first flange (2) has a sealing groove (5) inside, and the second flange (3) has a sealing ring (6) installed on the top, and the sealing ring (6) is movably abutting against the inside of the sealing groove (5); The first flange (2) is provided with a pressure relief mechanism for reducing the pressure on the sealing ring (6).

2. The pressure-resistant structure of a connecting flange according to claim 1, characterized in that: The pressure reducing mechanism includes a piston plate (7) which is slidably connected to the inside of the first flange (2). The sealing groove (5) has pressure holes corresponding to its number on the side near the piston plate (7). A first spring (9) is installed on one side of the piston plate (7). A sliding column (10) is sleeved inside the first spring (9). One end of the sliding column (10) is fixedly connected to the piston plate (7). The piston plate (7) moves against the sealing ring (6).

3. The pressure-resistant structure of a connecting flange according to claim 1, characterized in that: The first flange (2) is provided with a support mechanism inside for supporting the sealing ring (6).

4. The pressure-resistant structure of a connecting flange according to claim 3, characterized in that: The support mechanism includes a lever (11), which is rotatably connected to the inside of the first flange (2). One end of the lever (11) is rotatably connected to a support arm (12), and one end of the support arm (12) is fixedly connected to an auxiliary support block (13). A second spring (14) is installed between one end of the lever (11) and the first flange (2). The lever (11) is in movable contact with the sliding column (10).

5. The pressure-resistant structure of a connecting flange according to claim 1, characterized in that: The first flange (2) has wedge-shaped recesses (17) installed on both sides of its bottom. The second flange (3) has drive screws (15) threadedly connected to both sides of its interior. The end of the drive screws (15) is rotatably connected to wedge-shaped protrusions (16).

6. The pressure-resistant structure of a connecting flange according to claim 4, characterized in that: The number of levers (11) corresponds to the number of piston plates (7).

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