Flange plate mounting structure reliable in sealing

Abstract

The utility model discloses a flange plate mounting structure reliable in sealing, which belongs to the technical field of flange butt joint and comprises a first flange plate, a second flange plate and a sealing gasket, a mounting groove is axially arranged on a sealing surface of the first flange plate, and a mounting column in matched connection with the mounting groove is axially and convexly arranged on a sealing surface of the second flange plate. The free end of the mounting column abuts against the groove bottom wall of the mounting groove, the sealing gasket is clamped between the sealing face of the first flange plate and the sealing face of the second flange plate and arranged outside the mounting column in a sleeving mode, and an inclined face is arranged on the outer wall of the mounting column. The distances from all positions on the inclined face to the central axis of the first flange plate are sequentially reduced in the extending direction from the first flange plate to the second flange plate, a locking bolt is installed on the first flange plate in the radial direction in a threaded mode, and one end of the locking bolt abuts against the inclined face. According to the utility model, the integrity of the sealing gasket structure is ensured, the sealing effect is guaranteed, the sealing gasket can be prevented from being excessively extruded, and the use is reliable.

Description

Technical Field

[0001] This utility model relates to the field of flange docking technology, and in particular, to a flange mounting structure with reliable sealing. Background Technology

[0002] A flange is a ring-shaped part used to connect pipes, valves, pumps, and other equipment or components. The most common connection method between flanges is a flat thread connection. This involves pre-tightening bolts to compress the gasket between the flange sealing surfaces, filling any uneven gaps and achieving a good seal. In practice, through holes are made axially on both flanges, and one end of each bolt passes through the through hole and is then locked in place with a nut. To ensure a tight seal between the flanges, a gasket is placed between the two sealing surfaces. This gasket has multiple through-holes spaced circumferentially to allow bolts to pass through. The structure of this type of gasket can be found in Chinese Invention Patent CN118728958A, which discloses a gasket and its processing method and production equipment. However, the presence of these through-holes disrupts the overall structure of the gasket, potentially leading to poor sealing at the openings. Meanwhile, if the pressure applied to the sealing gasket by the flange sealing surface is too great during the tightening process of the nut and bolt, the sealing gasket is very likely to fail due to exceeding its own load-bearing capacity, resulting in poor reliability. Utility Model Content

[0003] The technical problem to be solved by this utility model is that in the prior art, the relief hole opened on the sealing gasket for the bolt to pass through will damage the structure of the sealing gasket and result in poor sealing at the opening. Based on this, this utility model provides a flange installation structure with reliable sealing.

[0004] The technical solution adopted by this utility model to solve its technical problem is: a reliable sealing flange installation structure, including a first flange, a second flange and a sealing gasket. The sealing surface of the first flange is provided with an axially oriented installation groove. The sealing surface of the second flange is provided with an axially oriented installation column that cooperates with and connects to the installation groove. The free end of the installation column abuts against the bottom wall of the installation groove. The sealing gasket is sandwiched between the sealing surfaces of the first flange and the second flange and is sleeved on the outside of the installation column. The outer wall of the installation column is provided with an inclined surface. The distance from each point on the inclined surface to the central axis of the first flange decreases sequentially along the extension direction from the first flange to the second flange. A locking bolt is installed on the first flange with a radial thread, and one end of the locking bolt abuts against the inclined surface.

[0005] Furthermore, one end of the locking bolt is configured as a hemispherical structure, which abuts against the inclined surface.

[0006] Furthermore, multiple threaded holes are evenly distributed circumferentially on the side wall of the first flange, and the locking bolt is connected to the threaded holes.

[0007] Furthermore, a conical surface is provided on the outer surface of the mounting post, which forms the inclined surface.

[0008] Furthermore, a limiting groove is formed on the outer surface of the mounting column, the inclined surface is formed by the bottom wall of the limiting groove, the groove width of the limiting groove matches the locking bolt, and one end of the locking bolt extends into the limiting groove and abuts against the inclined surface.

[0009] Furthermore, a sealing groove is provided on the side wall of the mounting column away from the sealing surface of the second flange, and a sealing ring is installed in the sealing groove.

[0010] Furthermore, a receiving groove is provided on the outer side wall of the first flange, and the threaded hole is provided on the bottom wall of the receiving groove. A sealing block is installed in the receiving groove, and the locking bolt passes through the sealing block and is threadedly connected to the threaded hole. The sealing block extends out of the receiving groove and abuts against the protruding part on the locking bolt.

[0011] Furthermore, an open washer is fitted over the locking bolt, and the open washer is located between the first flange and the protruding portion on the locking bolt.

[0012] The beneficial effects of this utility model are:

[0013] 1. The flange mounting structure provided by this utility model has a reliable sealing. The fixing bolt is installed radially on the first flange and cooperates with the inclined surface set on the second flange to lock the second flange on the first flange. Compared with the traditional connection method of axially inserted bolts, there is no need to open the gasket for the bolt to pass through, which ensures the integrity of the gasket structure and guarantees the sealing effect.

[0014] 2. When the second flange moves relative to the first flange until the free end of the mounting post abuts against the bottom wall of the mounting groove, the second flange can no longer move into the first flange. This ensures that the gasket will not be excessively compressed, making the compression of the gasket controllable. While meeting the sealing requirements, it also effectively prevents the gasket from easily failing, making it more reliable in use. Attached Figure Description

[0015] The present invention will be further described below with reference to the accompanying drawings and embodiments.

[0016] Figure 1 This is a perspective view of the flange mounting structure of this utility model with reliable sealing;

[0017] Figure 2 yes Figure 1 Front view of the flange mounting structure shown, indicating a reliable seal.

[0018] Figure 3 yes Figure 2 The flange mounting structure shown is a cross-sectional view along AA, indicating a reliable seal.

[0019] Figure 4 yes Figure 3 A magnified view of point B in the flange mounting structure shown, which has a reliable seal.

[0020] In the figure: 1. First flange, 11. Mounting groove, 12. Threaded hole, 13. Receiving groove, 2. Second flange, 21. Mounting post, 211. Bevel, 212. Sealing groove, 3. Sealing gasket, 4. Locking bolt, 5. Sealing ring, 6. Sealing block, 7. Open gasket. Detailed Implementation

[0021] The present invention will now be described in detail with reference to the accompanying drawings. These drawings are simplified schematic diagrams, illustrating only the basic structure of the present invention, and therefore only show the components relevant to the present invention.

[0022] Please see Figures 1-4 This utility model provides a reliable flange mounting structure, including a first flange 1, a second flange 2, and a sealing gasket 3. The sealing surface of the first flange 1 is provided with an axially oriented mounting groove 11. The sealing surface of the second flange 2 is provided with an axially oriented mounting post 21. The mounting post 21 is connected to the mounting groove 11. The free end of the mounting post 21 (i.e., the end of the mounting post 21 away from the sealing surface of the second flange 2) abuts against the bottom wall of the mounting groove 11. The sealing gasket 3 is sandwiched between the sealing surfaces of the first flange 1 and the second flange 2 and is sleeved on the outside of the mounting post 21. An inclined surface 211 is provided on the outer wall of the mounting post 21. The distance from each point on the inclined surface 211 to the central axis of the first flange 1 decreases sequentially along the extension direction from the first flange 1 to the second flange 2. A locking bolt 4 is installed on the first flange 1 with a radial thread. One end of the locking bolt 4 abuts against the inclined surface 211.

[0023] This utility model provides a reliable flange mounting structure. During installation, the sealing gasket 3 is first fitted onto the outside of the mounting post 21. Then, the mounting post 21 is inserted into the mounting groove 11, thus initially pressing the sealing gasket 3 between the two sealing surfaces of the first flange 1 and the second flange 2. Next, the locking bolt 4 is threaded onto the first flange 1, so that one end of the locking bolt 4 passes through the wall of the first flange 1 and abuts against the inclined surface 211. Continuing to rotate the locking bolt 4, it continues to extend inward. Under the action of the inclined surface 211, the mounting post 21 can move further into the mounting groove 11, thereby bringing the two sealing surfaces of the first flange 1 and the second flange 2 closer together. The sealing gasket 3 can be further compressed. When the free end of the mounting post 21 abuts against the bottom wall of the mounting groove 11, the second flange 2 can no longer move relative to the first flange 1. At this point, the two are installed in place, and the sealing gasket 3 can no longer be compressed.

[0024] During the installation process described above, the locking bolts 4 are installed radially on the first flange 1 and, in conjunction with the inclined surface 211 on the second flange 2, lock the second flange 2 onto the first flange 1. Compared to the traditional axial insertion bolt connection method, there is no need to create clearance holes in the gasket 3 for the bolts to pass through, ensuring the integrity of the gasket 3 structure and guaranteeing the sealing effect. Simultaneously, when the second flange 2 moves relative to the first flange 1 until the free end of the mounting post 21 abuts against the bottom wall of the mounting groove 11, the second flange 2 can no longer move further into the first flange 1. This ensures that the gasket 3 is not excessively compressed, making the compression of the gasket 3 controllable. While meeting the sealing requirements, this also effectively prevents the gasket 3 from easily failing, making its use more reliable.

[0025] In this embodiment, one end of the locking bolt 4 is configured as a hemispherical structure, which abuts against the inclined surface 211. The contact between the hemispherical structure and the inclined surface 211 reduces the friction between the locking bolt 4 and the inclined surface 211, which helps to drive the mounting post 21 to move when the locking bolt 4 is rotated. At the same time, it reduces the wear of the locking bolt 4 on the inclined surface 211.

[0026] Multiple threaded holes 12 are evenly distributed circumferentially on the side wall of the first flange 1. One end of each threaded hole 12 penetrates the outer side wall of the first flange 1, and the other end connects to the mounting groove 11. Locking bolts 4 are connected to the threaded holes 12. In this embodiment, four locking bolts 4 are provided to lock the second flange 2 from four directions, thereby improving locking reliability.

[0027] In a preferred embodiment, a conical surface is provided on the outer surface of the mounting post 21, which forms the inclined surface 211. Since the inclined surface 211 is a conical surface, when installing the mounting post 21 in the mounting groove 11, there is no need to deliberately adjust the corresponding position between the inclined surface 211 and the locking bolt 4. Simply insert the mounting post 21 into the mounting groove 11 and then tighten the locking bolt 4. The operation is simple and convenient.

[0028] Considering that the locking bolt 4 and the inclined surface 211 formed by the conical surface lack a certain limiting function in the circumferential direction, which may cause the second flange 2 to rotate relative to the first flange 1, in other embodiments not shown, a limiting groove is formed on the outer surface of the mounting post 21. The inclined surface 211 is formed by the bottom wall of the limiting groove, wherein the width of the limiting groove matches the locking bolt 4. In this way, when one end of the locking bolt 4 extends into the limiting groove and abuts against the inclined surface 211, the limiting groove can limit the locking bolt 4, effectively preventing the second flange 2 from rotating relative to the locking bolt 4, thereby avoiding the second flange 2 from rotating relative to the first flange 1.

[0029] In a preferred embodiment, a sealing groove 212 is formed on the side wall of the mounting post 21 away from the sealing surface of the second flange 2, and a sealing ring 5 is installed in the sealing groove 212. When the first flange 1 and the second flange 2 are separated, the sealing ring 5 installed in the sealing groove 212 partially protrudes to the outside of the mounting groove 212. When the first flange 1 and the second flange 2 are installed in place, the sealing ring 5 undergoes elastic deformation and is completely compressed into the sealing groove 212. Therefore, the compression of the sealing ring 5 is controllable, preventing it from being damaged or failing due to excessive pressure. The sealing ring 5 is positioned between the free end of the mounting post 21 and the bottom wall of the mounting groove 11, providing a preliminary sealing effect.

[0030] Please see Figure 4 In a preferred embodiment, a receiving groove 13 is formed on the outer wall of the first flange 1, and a threaded hole 12 is formed on the bottom wall of the receiving groove 13. A sealing block 6 is installed in the receiving groove 13. The sealing block 6 is made of silicone or rubber material. The locking bolt 4 passes through the sealing block 6 and is threaded into the threaded hole 12. Part of the sealing block 6 extends outside the receiving groove 13 and abuts against the protrusion on the locking bolt 4. When the locking bolt 4 is installed in place, the sealing block 6 is squeezed and deformed by the protrusion on the locking bolt 4, thereby ensuring the sealing between the locking bolt 4 and the first flange 1.

[0031] Furthermore, an open washer 7 is fitted over the locking bolt 4. The open washer 7 is located between the first flange 1 and the protruding part on the locking bolt 4, thereby pre-tightening the locking bolt 4 and preventing the sealing block 6 from being excessively compressed. In addition, to facilitate the installation of the open washer 7, the portion of the outer surface of the first flange 1 corresponding to the open washer 7 is set as a plane, and the open washer 7 is pressed between this plane and the protruding part on the locking bolt 4.

[0032] Based on the above-described preferred embodiments of this utility model, and through the foregoing description, those skilled in the art can make various changes and modifications without departing from the scope of this utility model. The technical scope of this utility model is not limited to the contents of the specification, but must be determined according to the scope of the claims.

Claims

1. A reliable flange mounting structure, comprising a first flange, a second flange, and a sealing gasket, characterized in that: The first flange has an axially oriented mounting groove on its sealing surface, and the second flange has an axially oriented mounting post that mates with the mounting groove on its sealing surface. The free end of the mounting post abuts against the bottom wall of the mounting groove. The sealing gasket is sandwiched between the sealing surfaces of the first and second flanges and is fitted over the mounting post. The outer wall of the mounting post has an inclined surface. The distance from each point on the inclined surface to the central axis of the first flange decreases sequentially along the extension direction from the first flange to the second flange. A locking bolt is installed radially threaded on the first flange, and one end of the locking bolt abuts against the inclined surface.

2. The flange mounting structure with reliable sealing as described in claim 1, characterized in that: One end of the locking bolt is configured as a hemispherical structure, which abuts against the inclined surface.

3. The flange mounting structure with reliable sealing as described in claim 1, characterized in that: The first flange has multiple threaded holes evenly distributed along its circumference on its side wall, and the locking bolt is connected to the threaded holes.

4. The flange mounting structure with reliable sealing as described in any one of claims 1-3, characterized in that: A conical surface is provided on the outer surface of the mounting post, which forms the inclined surface.

5. The flange mounting structure with reliable sealing as described in any one of claims 1-3, characterized in that: A limiting groove is formed on the outer surface of the mounting column. The inclined surface is formed by the bottom wall of the limiting groove. The width of the limiting groove matches the locking bolt. One end of the locking bolt extends into the limiting groove and abuts against the inclined surface.

6. The flange mounting structure with reliable sealing as described in claim 1, characterized in that: A sealing groove is provided on the side wall of the mounting column away from the sealing surface of the second flange, and a sealing ring is installed in the sealing groove.

7. The flange mounting structure with reliable sealing as described in claim 3, characterized in that: A receiving groove is provided on the outer side wall of the first flange, and a threaded hole is provided on the bottom wall of the receiving groove. A sealing block is installed in the receiving groove, and the locking bolt passes through the sealing block and is threadedly connected to the threaded hole. The sealing block extends out of the receiving groove and abuts against the protruding part on the locking bolt.

8. The flange mounting structure with reliable sealing as described in claim 7, characterized in that: An open washer is fitted over the locking bolt, and the open washer is located between the first flange and the protruding part on the locking bolt.

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