Flange structure with improved sealing effect

Abstract

This utility model discloses a flange structure that improves sealing performance, aiming to solve the problem that the sealing effect between flanges and equipment is severely affected once the bolt connection loosens, as the bolts are used to fix the flanges to the equipment. The key technical points are: a flange structure that improves sealing performance includes a first flange and a second flange for mating connection. Two recessed grooves are symmetrically formed on the edges of the connecting end faces of the first and second flanges. A positioning rod is provided at one end of the recessed groove of the first flange, and a limiting plate is movably sleeved on the positioning rod. In this flange structure that improves sealing performance, the outer periphery of the first and second flanges is further limited by the limiting plate, which, in conjunction with existing bolt fastening methods, forms a "axial + radial" bidirectional constraint. Simultaneously, the cooperation of the locking block and the groove further enhances the axial connection stability of the first and second flanges, thereby effectively improving the sealing performance of the flanges.

Description

Technical Field

[0001] This utility model relates to the field of flange technology, and more specifically, to a flange structure that can improve the sealing effect. Background Technology

[0002] A flange is a disc-shaped component typically used for connecting piping systems or mechanical parts. It has bolt holes on its outer circumference and a central opening through which the pipe or equipment passes. During installation, two flanges are placed opposite each other, bolts are passed through the bolt holes, and nuts are tightened to secure the pipes or equipment, ensuring no leakage of the medium within the pipeline.

[0003] Good sealing performance is an essential requirement for flanges. Existing flanges are fixed to equipment with bolts, and the main stress points come from the bolt structure. This requires high rigidity and hardness of the bolts. Although the overall weight of the flange is not heavy, once the bolt connection is loose, the sealing effect between the flanges will be severely affected, resulting in the sealing surfaces not being able to fit tightly. Therefore, there is still considerable room for improvement in the sealing effect of traditional flange structures. Utility Model Content

[0004] In view of the shortcomings of the existing technology, the purpose of this utility model is to provide a flange structure that can improve the sealing effect. It solves the problem that the flange and the equipment are fixed by bolts. Once the bolt connection is loose, the sealing effect between the flanges will be seriously affected, resulting in the sealing surface not being able to fit tightly.

[0005] The above-mentioned technical objective of this utility model is achieved through the following technical solution: a flange structure that can improve the sealing effect, including a first flange and a second flange for mating connection. Two recessed grooves are symmetrically formed on the edges of the connecting end faces of the first flange and the second flange. A positioning rod is provided at one end of the recessed groove of the first flange, and a limiting plate is movably sleeved on the positioning rod. A positioning groove for inserting the positioning rod is formed on the recessed groove of the second flange. The limiting plate has an arc-shaped structure adapted to the first flange and the second flange. Two locking blocks are symmetrically arranged on the inner side of the limiting plate. Grooves for locking blocks are formed on the inner walls of the recessed grooves of the first flange and the second flange. The end of the limiting plate away from the positioning rod is fixedly connected to the first flange and the second flange by fasteners.

[0006] The present invention is further configured such that a sealing gasket is laid on the inner side of the limiting plate outside the card block.

[0007] The present invention is further configured such that the axial thickness of the limiting plate is the sum of the opening thicknesses of the two recessed grooves.

[0008] The present invention is further configured such that: coincidence indicator lines are provided on the edges of the connecting end faces of the first flange and the second flange.

[0009] The present invention is further configured such that the end of the positioning rod away from the first flange is provided with a chamfer.

[0010] The present invention is further provided with a pull ring at the end of the limiting plate away from the rotation center.

[0011] In summary, this utility model has the following beneficial effects:

[0012] The outer periphery of the first and second flanges is further limited by the limiting plate, which works in conjunction with the existing bolt fastening method to form a "axial + radial" bidirectional constraint. At the same time, the cooperation of the locking block and groove further enhances the axial connection stability of the first and second flanges. Even if the bolts loosen to a certain extent, the sealing surfaces between the flanges can still maintain a tight fit due to the existence of the limiting plate and locking block groove structure, thereby effectively improving the sealing effect of the flanges. Attached Figure Description

[0013] Figure 1 This is a schematic diagram of the overall structure of the flange structure of this utility model;

[0014] Figure 2 This is a structural diagram of the limiting plate of this utility model in its unfolded state.

[0015] In the diagram: 1. First flange; 2. Second flange; 3. Recessed groove; 4. Positioning rod; 5. Limiting plate; 6. Positioning groove; 7. Locking block; 8. Groove; 9. Sealing gasket; 10. Coincidence indicator line; 11. Pull ring. Detailed Implementation

[0016] To enable those skilled in the art to better understand the technical solution of this utility model, the present utility model will be further described in detail below with reference to the accompanying drawings and specific embodiments. It should be noted that, in the absence of conflict, the embodiments and features in the embodiments of this application can be combined with each other.

[0017] In the description of this utility model, it should be noted that the terms "upper", "lower", "inner", "outer", "top / bottom", etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are only for the convenience of describing this utility model and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this utility model.

[0018] In the description of this utility model, it should be noted that, unless otherwise explicitly specified and limited, the terms "installed," "equipped with," "set up / connected," "connected," etc., should be interpreted broadly. For example, "connection" can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection or an indirect connection through an intermediate medium; it can be a connection within two components. Those skilled in the art can understand the specific meaning of the above terms in this utility model based on the specific circumstances.

[0019] The present invention will now be described in detail with reference to the accompanying drawings.

[0020] Reference Figures 1-2 A flange structure that can improve the sealing effect includes a first flange 1 and a second flange 2 for mating connection, and also includes 9 sealing gaskets for placing between the first flange 1 and the second flange 2. The first flange 1 and the second flange 2 are fastened together by bolts, which is a mature existing technology and will not be described in detail here.

[0021] Two recessed grooves 3 are symmetrically formed on the edge of the connecting end face of the first flange 1 and the second flange 2. A positioning rod 4 is fixedly provided at one end of the recessed groove 3 of the first flange 1. A limiting plate 5 is movably sleeved on the positioning rod 4. A positioning groove 6 for the positioning rod 4 to be inserted is formed on the recessed groove 3 of the second flange 2. The limiting plate 5 has an arc-shaped structure that is adapted to the first flange 1 and the second flange 2. Two locking blocks 7 are symmetrically fixed on the inner side of the limiting plate 5. Grooves 8 for the locking blocks 7 to be inserted are formed on the inner wall of the recessed groove 3 of the first flange 1 and the second flange 2. The end of the limiting plate 5 away from the positioning rod 4 is fixedly connected to the first flange 1 and the second flange 2 by fasteners, which are fastening bolts.

[0022] A sealing gasket 9 is laid on the inner side of the limiting plate 5 outside the locking block 7. When the limiting plate 5 rotates to make the locking block 7 lock into the groove 8 and is fixed by fasteners, the sealing gasket 9 will fit tightly around the connection part of the first flange 1 and the second flange 2, further enhancing the sealing performance of the flange connection part.

[0023] The axial thickness of the limiting plate 5 is the sum of the opening thicknesses of the two recessed grooves 3, so that after installation, the two sides of the limiting plate 5 can fit perfectly with the connection end faces of the first flange 1 and the second flange 2. This ensures the flatness of the flange connection and increases the contact area between the limiting plate 5 and the first flange 1 and the second flange 2, making the whole system more stable and reliable.

[0024] Both the first flange 1 and the second flange 2 have coincidence indicator lines 10 on their connecting end faces. During installation, the operator can quickly indicate whether the connecting end faces of the first flange 1 and the second flange 2 are close to each other at the expected relative angle by observing the coincidence indicator lines 10, thereby ensuring that the positioning rod 4 can be smoothly inserted into the positioning groove 6.

[0025] The end of the positioning rod 4 away from the first flange 1 is chamfered. When the second flange 2 is connected to the first flange 1, the chamfer can guide the positioning rod 4 and reduce the difficulty of inserting it into the positioning groove 6, so that the positioning rod 4 can be smoothly inserted into the positioning groove 6 on the second flange 2.

[0026] A pull ring 11 is also fixed at the end of the limiting plate 5 away from the rotation center. The pull ring 11 provides an easy point for the operator to apply force. When it is necessary to rotate the limiting plate 5, the operator can apply external force by pulling the pull ring 11 to make the limiting plate 5 rotate around the positioning column.

[0027] Working principle: In use, first align the positioning groove 6 on the second flange 2 with the positioning rod 4 on the first flange 1. When the connecting end face of the second flange 2 and the first flange 1 is in contact, the positioning rod 4 is smoothly inserted into the positioning groove 6. Due to the positioning effect of the positioning rod 4, the relative angle between the first flange 1 and the second flange 2 is also determined, so that the bolt holes on both are automatically aligned. This makes it easier to bolt the first flange 1 and the second flange 2 according to the existing technology. At this time, the two flanges are initially fixed. Then, by rotating the limiting plate 5 set on the positioning column, since the limiting plate 5 has an arc-shaped structure that is compatible with the first flange 1 and the second flange 2, during the rotation, the two symmetrically set on its inner side can be accurately inserted into the corresponding grooves 8 on the inner wall of the recessed groove 3 of the first flange 1 and the second flange 2 respectively. Finally, fasteners are used to fix it so that the limiting plate 5 is kept in this position.

[0028] At this time, the outer periphery of the first flange 1 and the second flange 2 is further limited by the limiting plate 5, which works in conjunction with the existing bolt fastening method to form a "axial + radial" bidirectional constraint. At the same time, the cooperation of the locking block 7 and the groove 8 further enhances the axial connection stability of the first flange 1 and the second flange 2. Even if the bolts loosen to a certain extent, the sealing surfaces between the flanges can still maintain a tight fit due to the existence of the limiting plate 5 and the locking block 7 and groove 8 structure, thereby effectively improving the sealing effect of the flanges.

[0029] The above are merely preferred embodiments of this utility model. The protection scope of this utility model is not limited to the above embodiments. All technical solutions falling within the scope of this utility model's concept are within its protection scope. It should be noted that for those skilled in the art, any improvements and modifications made without departing from the principle of this utility model should also be considered within its protection scope.

Claims

1. A flange structure for improving sealing performance, comprising a first flange (1) and a second flange (2) for mating connection, characterized in that: Two recessed grooves (3) are symmetrically opened on the edge of the connecting end face of the first flange (1) and the second flange (2). A positioning rod (4) is provided at one end of the recessed groove (3) of the first flange (1). A limiting plate (5) is movably sleeved on the positioning rod (4). A positioning groove (6) for the positioning rod (4) to be inserted is opened on the recessed groove (3) of the second flange (2). The limiting plate (5) has an arc-shaped structure adapted to the first flange (1) and the second flange (2). Two locking blocks (7) are symmetrically arranged on the inner side of the limiting plate (5). A groove (8) for the locking blocks (7) to be inserted is opened on the inner wall of the recessed groove (3) of the first flange (1) and the second flange (2). The end of the limiting plate (5) away from the positioning rod (4) is fixedly connected to the first flange (1) and the second flange (2) by fasteners.

2. The flange structure for improving sealing performance according to claim 1, characterized in that: The inner side of the limiting plate (5) is covered with a sealing gasket (9) outside the locking block (7).

3. The flange structure for improving sealing performance according to claim 1, characterized in that: The axial thickness of the limiting plate (5) is the sum of the opening thicknesses of the two recessed grooves (3).

4. The flange structure for improving sealing performance according to claim 1, characterized in that: Both the first flange (1) and the second flange (2) have coincidence indicator lines (10) on their connecting end faces.

5. The flange structure for improving sealing performance according to claim 1, characterized in that: The end of the positioning rod (4) away from the first flange (1) is chamfered.

6. The flange structure for improving sealing performance according to claim 1, characterized in that: The limiting plate (5) is also provided with a pull ring (11) at the end away from the rotation center.

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