Anti-falling flange

Abstract

The utility model relates to the technical field of flanges, in particular to an anti-falling flange which comprises a first flange, a second flange, a clamping assembly and a sealing structure, and a first ring groove and a second ring groove are formed in the first flange; the clamping assembly comprises a boss arranged on the second flange, six inserting blocks distributed on the first flange in an annular array mode and a rectangular groove formed in the boss and allowing the inserting blocks to be inserted, the boss is completely inserted into the first annular groove, and the first flange abuts against the second flange. The sealing structure comprises a sealing piece arranged in a gap between the first flange and the second flange. The flange connection structure can solve the problem that the flange connection is not firm enough, so that the flange is loosened and shaken, meanwhile, the sealing performance of the flange connection part is ensured, and the leakage condition is avoided.

Description

Technical Field

[0001] The utility model relates to the technical field of flanges, in particular to an anti - detachment flange. Background Art

[0002] An anti - detachment flange is a specially designed flange aimed at improving the safety and reliability of pipeline connections. Anti - detachment flanges are usually used in high - pressure or high - temperature environments, as well as those applications that may experience vibration or thermal expansion. The design of the anti - detachment flange can prevent the failure of the flange connection caused by internal pressure or external forces, reduce the risk of leakage, and ensure the integrity of the pipeline system.

[0003] Chinese Patent Publication No. CN221034470U discloses an anti - detachment flange plate, which includes a first flange plate and a second flange plate. The second flange plate has the same structure as the first flange plate. The bottom surface of the first flange plate is provided with concavo - convex shapes. The upper part of the first flange plate is provided with mounting holes. A sealing gasket is arranged between the first flange plate and the second flange plate. The first flange plate and the second flange plate are connected by bolts, and the bolts are fixed by a first nut. A first gasket is arranged between the first nut and the first flange plate. A second gasket is arranged between the bolts and the second flange plate. An anti - detachment device is sleeved on the first nut. The anti - detachment device includes an anti - detachment cover, and the anti - detachment covers are fixedly connected by an annular rod. A second nut is fixed on the upper part of the anti - detachment cover. The concavo - convex arrangement between the flange plates effectively avoids the loosening of the structure caused by the rotation of the flange plates during use, and the anti - detachment device avoids the falling off of the nut caused by the loosening of the structure, greatly improving the overall anti - detachment performance.

[0004] However, the above - mentioned technical solution has the following deficiencies: There is no sealing structure installed inside the flange structure, resulting in easy leakage when the flange is working. Moreover, the flanges are still relatively flat, resulting in insufficiently firm connection and easy loosening and shaking. Summary of the Utility Model

[0005] The purpose of the utility model is to address the problems in the background art by proposing an anti - detachment flange that can solve the problem of loose shaking caused by insufficiently firm flange connection, and at the same time ensure the sealing performance of the flange connection part to avoid leakage.

[0006] The technical solution of the utility model: An anti - detachment flange includes a first flange, a second flange, a clamping component, and a sealing structure. The first flange is provided with a first annular groove and a second annular groove; the clamping component includes a boss arranged on the second flange, six inserts arranged on the first flange in an annular array, and a rectangular groove arranged on the boss for the inserts to insert into. The boss is completely inserted into the first annular groove, and the first flange and the second flange are in mutual contact; the sealing structure includes a sealing member arranged in the gap between the first flange and the second flange.

[0007] Preferably, the axial centerlines of the first flange and the second flange coincide, and a first connecting pipe and a second connecting pipe are coaxially arranged on the first flange and the second flange respectively.

[0008] Preferably, the seal is in close fit with both the first annular groove and the second annular groove.

[0009] Preferably, six first positioning holes and six second positioning holes are respectively arranged on the first flange and the second flange in an annular array distribution. The axial centerlines of the first positioning holes and the second positioning holes coincide and are threadedly connected with external hexagon bolts. A first through hole for the external hexagon bolts to penetrate is arranged on the seal.

[0010] Preferably, a nut is threadedly connected to the external hexagon bolt, and the nut abuts against the second flange.

[0011] Preferably, six countersunk holes and six limiting grooves are respectively arranged on the first flange and the second flange in an annular array distribution. The axial centerlines of the countersunk holes and the limiting grooves coincide and are threadedly connected with internal hexagon bolts. A second through hole for the internal hexagon bolts to penetrate is arranged on the seal.

[0012] Compared with the prior art, the utility model has the following beneficial technical effects:

[0013] 1. Through the provided clamping component, the utility model can not only play a positioning role in the butt joint of the flanges, but also increase the fitting area between the first flange and the second flange, improve the effect of fixed connection, and at the same time cooperate with the seal to ensure the sealing performance of the connection, avoiding the leakage that is likely to occur when the flange is working, and having good practicability.

[0014] 2. Through the provided external hexagon bolts, nuts and internal hexagon bolts, the connection between the first flange and the second flange is fastened in multiple directions, ensuring the tightness of the flange connection and avoiding the flange from falling off. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] Figure 1 is a schematic structural diagram of an embodiment of the utility model;

[0016] Figure 2 is a split schematic diagram of the overall structure;

[0017] Figure 3 is a cross-sectional schematic diagram of the overall structure;

[0018] Figure 4 is an axonometric schematic diagram of the first flange.

[0019] Reference numerals: 1, first flange; 2, second flange; 3, first connecting pipe; 4, second connecting pipe; 5, boss; 6, first annular groove; 7, inserting block; 8, rectangular groove; 9, seal; 10, second annular groove; 11, external hexagonal bolt; 12, nut; 13, first positioning hole; 14, first through hole; 15, second positioning hole; 16, counterbore; 17, internal hexagonal bolt; 18, second through hole; 19, limiting groove. Detailed implementation manners

[0020] Embodiment 1

[0021] As Figures 1 - 4 shown, a flange anti - detachment proposed in this embodiment includes a first flange 1, a second flange 2, a clamping component and a sealing structure. The axial centerlines of the first flange 1 and the second flange 2 coincide. A first connecting pipe 3 and a second connecting pipe 4 are coaxially arranged on the first flange 1 and the second flange 2 respectively. The first connecting pipe 3 and the second connecting pipe 4 are used to connect external pipelines. A first annular groove 6 and a second annular groove 10 are arranged on the first flange 1.

[0022] As Figure 2 and Figure 3 shown, the clamping component includes a boss 5 arranged on the second flange 2, six inserting blocks 7 distributed in an annular array on the first flange 1, and a rectangular groove 8 arranged on the boss 5 for the inserting blocks 7 to insert into. The boss 5 is completely inserted into the first annular groove 6, the first flange 1 and the second flange 2 are in contact with each other, and the shape of the boss 5 is cylindrical;

[0023] The sealing structure includes a seal 9 arranged in the gap between the first flange 1 and the second flange 2. The seal 9 is in close fit with both the first annular groove 6 and the second annular groove 10. One side of the seal 9 in contact with the first flange 1 is set as a hard layer, and the side in contact with the second flange 2 is set as an elastic layer, which is convenient for the seal 9 to be in close fit with the first annular groove 6 and the second annular groove 10.

[0024] In this embodiment, when it is necessary to dock and fix the first flange 1 and the second flange 2, first place the seal 9 inside the first flange 1, and the seal 9 is in close fit with the first annular groove 6 and the second annular groove 10. Then insert the boss 5 of the second flange 2 into the first annular groove 6 and squeeze the seal 9, so that the parts of the second flange 2 and the first flange 1 close to the outer ring surface are in contact. At the same time, ensure that all six inserting blocks 7 are embedded in the rectangular groove 8. The arrangement of the inserting blocks 7 not only plays a role in positioning and installation, but also increases the contact area between the first flange 1 and the second flange 2, improving the effect of fixed connection. Furthermore, while stably connecting the first flange 1 and the second flange 2, the sealing performance of the flange connection is ensured, avoiding the situation that the flange is prone to leakage during work, and having good practicability.

[0025] Embodiment 2

[0026] As shown Figures 1 - 3 As shown, a flange anti-loosening structure proposed in this embodiment, compared with the first embodiment, in this embodiment, six first positioning holes 13 and six second positioning holes 15 distributed in an annular array are respectively provided on the first flange 1 and the second flange 2. The axial centerlines of the first positioning holes 13 and the second positioning holes 15 coincide and are threadedly connected with an external hexagon bolt 11. A first through hole 14 for the external hexagon bolt 11 to penetrate is provided on the seal 9. A nut 12 is threadedly connected to the external hexagon bolt 11, and the nut 12 abuts against the second flange 2.

[0027] Six countersunk holes 16 and limiting grooves 19 distributed in an annular array are respectively provided on the first flange 1 and the second flange 2. The axial centerlines of the countersunk holes 16 and the limiting grooves 19 coincide and are threadedly connected with an internal hexagon bolt 17. A second through hole 18 for the internal hexagon bolt 17 to penetrate is provided on the seal 9.

[0028] In this embodiment, after the first flange 1 and the second flange 2 are aligned axially, first screw the external hexagon bolt 11 into the first positioning hole 13, and penetrate through the first through hole 14 and the second positioning hole 15 until the external hexagon bolt 11 can no longer rotate, and then screw the nut 12 onto the stud until the nut 12 abuts against the surface of the second flange 2. After the external hexagon bolt 11 is installed, screw the internal hexagon bolt 17 into the countersunk hole 16 until the bottom end of the stud of the internal hexagon bolt 17 abuts against the bottom surface of the limiting groove 19, that is, the docking and fixing of the first flange 1 and the second flange 2 are completed, and the connection effect is stable, avoiding the situation that the flange connection is not firm enough and is prone to falling off.

[0029] The above has described in detail the embodiments of the present invention in conjunction with the drawings, but the present invention is not limited to this. Within the scope of knowledge possessed by those skilled in the art to which the present invention pertains, various changes can be made without departing from the purpose of the present invention.

Claims

1. An anti-drop flange, characterized in that: include: A first flange (1) and a second flange (2), wherein the first flange (1) is provided with a first annular groove (6) and a second annular groove (10); A snap-on assembly, comprising a boss (5) arranged on a second flange (2), six insert blocks (7) distributed in an annular array on a first flange (1), and a rectangular groove (8) arranged on the boss (5) and for the insert blocks (7) to be inserted into, the boss (5) being completely inserted into the first annular groove (6), and the first flange (1) and the second flange (2) being in contact with each other; A sealing structure comprises a sealing member (9) arranged in the gap between a first flange (1) and a second flange (2).

2. The anti-drop flange according to claim 1, characterized in that: The axial center lines of the first flange (1) and the second flange (2) coincide with each other, and a first connecting pipe (3) and a second connecting pipe (4) are coaxially arranged on the first flange (1) and the second flange (2), respectively.

3. The anti-drop flange according to claim 1, characterized in that: The sealing member (9) is tightly fitted to the first annular groove (6) and the second annular groove (10).

4. The anti-drop flange according to claim 1, characterized in that: The first flange (1) and the second flange (2) are respectively provided with six first positioning holes (13) and second positioning holes (15) distributed in an annular array, the axial center lines of the first positioning holes (13) and the second positioning holes (15) coincide with each other and are threadedly connected with external hexagonal bolts (11), and the sealing member (9) is provided with a first through hole (14) for the external hexagonal bolts (11) to pass through.

5. The anti-drop flange according to claim 4, characterized in that: A nut (12) is threadedly connected to the external hexagonal bolt (11), and the nut (12) and the second flange (2) are in contact with each other.

6. The anti-drop flange according to claim 1, characterized in that: The first flange (1) and the second flange (2) are respectively provided with six countersunk holes (16) and limiting grooves (19) distributed in an annular array. The countersunk hole (16) and the limiting groove (19) have the same axial centerline and are threadedly connected with a hexagon socket bolt (17). The sealing member (9) is provided with a second through hole (18) for the hexagon socket bolt (17) to pass through.

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