Flange sealing structure

Abstract

The utility model discloses a flange sealing structure, which relates to the technical field of connection sealing, and comprises a pipeline, one end of the pipeline is provided with a first flange, the top of the first flange is provided with a threaded hole, the top of the threaded hole is provided with a wave tooth composite gasket, the top of the threaded hole is provided with a through hole, and the through hole is provided with a through hole. One side of the first flange is movably connected with a nut, the inner wall of the nut is connected with a hexagon head bolt, and one end of the hexagon head bolt is connected with a second flange. Through the arrangement of the first flange, the threaded hole, the second flange, the threaded sleeve and the corrugated tooth composite gasket, the effect of tight threaded connection between the first flange and the second flange can be achieved through the threaded hole and the threaded sleeve while installation of the corrugated tooth composite gasket is not affected; the sealing performance between the first flange and the second flange is greatly improved, and meanwhile the corrugated tooth composite gasket can keep excellent sealing performance for a long time under the condition that temperature and pressure are prone to fluctuation.

Description

Technical Field

[0001] The utility model relates to the technical field of connection sealing, in particular to a flange sealing structure. Background Art

[0002] Flange connection is a commonly used mechanical connection method for pipelines. In actual applications, flange connections also need to be sealed. For example, the pipeline joints in aircraft environmental control systems and the one-way valve and pipeline installation points usually require a flange sealing structure for connection.

[0003] 1. In the existing technology, the traditional flange structure is generally a flat flange. When used for high-temperature pipelines, although the sealing gasket is made of high-temperature resistant rubber material, the sealing gasket may still be partially blown out of the corresponding position of the flange during the operation of the system, causing pipeline leakage, causing heat radiation to adjacent structures and equipment, affecting the normal operation of the system, and posing certain safety hazards.

[0004] 2. In the existing technology, the traditional flange structure is generally a flat flange, and the flanges are connected by general bolts. The sealing performance of ordinary bolts is poor. The design structure and fastening method of hexagonal head bolts can optimize the sealing performance of the flange joint, improve the tensile strength and corrosion resistance of the bolts, and increase the service life of the flange joint. Utility Model Content

[0005] The utility model provides a flange sealing structure to solve the problems raised in the above background technology.

[0006] In order to solve the above technical problems, the technical solution adopted by the present invention is:

[0007] A flange sealing structure includes a pipeline, a first flange is installed at one end of the pipeline, a threaded hole is provided at the top of the first flange, a corrugated composite gasket is installed at the top of the threaded hole, a through hole is provided at the top of the threaded hole, a nut is movably connected to one side of the first flange, a hexagonal bolt is connected to the inner wall of the nut, one end of the hexagonal bolt is connected to a second flange, and a threaded sleeve is installed on one side of the second flange.

[0008] A further improvement of the technical solution of the present invention is that the size of the inner wall of the threaded hole is consistent with the size of the outer wall of the threaded sleeve, and the outer wall of the threaded sleeve is tightly threadedly connected to the inner wall of the threaded hole.

[0009] By adopting the above technical solution, the use of threaded holes and threaded sleeves in this solution can achieve a tight connection between the first flange and the second flange, effectively preventing gas leakage caused by thermal deformation of the sealing gasket, and occupying a small layout space, greatly improving the sealing performance of the flange.

[0010] A further improvement of the technical solution of the present invention is that one side of the corrugated composite gasket is fitted and connected to the bottom of the inner wall of the threaded hole, and the size of the corrugated composite gasket is consistent with the size of the inner wall of the threaded hole.

[0011] The above technical solution, using corrugated composite gaskets and threaded holes, can maintain high sealing performance even with very low compressive stress. It can be applied to specifications ranging from DNL0 pipe flanges to DN2500 container flanges. It can also maintain excellent sealing performance over a long period of time in environments prone to temperature and pressure fluctuations.

[0012] A further improvement of the technical solution of the present invention is that eight groups of hexagonal head bolts are provided, and the eight groups of hexagonal head bolts are arranged in a circular array on the top of the second flange, and the eight groups of hexagonal head bolts are spaced uniformly on the top of the second flange.

[0013] By adopting the above technical solution, the use of hexagonal head bolts and the second flange in this solution reduces the spacing between the hexagonal head bolts, so that the hexagonal head bolt force is evenly transmitted to the gasket, obtaining a uniform and sufficient sealing pressure ratio, which can improve the sealing performance. At the same time, while meeting the space required for tightening and removing the bolts, increasing the number of bolts can also improve the sealing between the flanges.

[0014] A further improvement of the technical solution of the present utility model is that one end of the hexagonal head bolt is tightly threadedly connected to the inner wall of the through hole on the top of the first flange and the second flange, and the bolt head of the hexagonal head bolt is fit-connected to the top of the second flange.

[0015] By adopting the above technical solution, the use of the hexagonal head bolts, the second flange and the first flange in this solution, the design structure and fastening method of the hexagonal head bolts can optimize the sealing performance of the flange joint, improve the tensile strength and corrosion resistance of the bolts, and increase the service life of the flange joint.

[0016] Due to the adoption of the above technical solution, the present invention has achieved the following technical advancements compared to the prior art:

[0017] 1. The utility model provides a flange sealing structure, which is provided with a first flange, a threaded hole, a second flange, a threaded sleeve, and a corrugated composite gasket. The threaded hole and the threaded sleeve can achieve a tight threaded connection between the first flange and the second flange without affecting the installation of the corrugated composite gasket, thereby greatly improving the close contact between the first flange and the second flange. At the same time, the corrugated composite gasket can maintain excellent sealing performance for a long time under conditions where temperature and pressure are prone to fluctuations.

[0018] 2, the utility model provides a flange sealing structure, be provided with through -hole, nut, hexagonal head bolt, first flange and threaded hole and second flane and threaded sleeve and the top of wave tooth composite gasket all are equipped with eight sets of through -hole, the inner wall of eight sets of through -hole all is bonded with the outer wall of eight sets of hexagonal head bolt and connects, under the condition that meet the space required for fastening and disassembling bolt, increase the number of bolt can improve the sealing between flange, and hexagonal head bolt can optimize the sealing performance of flange joint. BRIEF DESCRIPTION OF DRAWINGS

[0019] Figure 1 It is structure front view of the utility model;

[0020] Figure 2 It is structure left view of the utility model;

[0021] Figure 3 It is structure right view of the utility model;

[0022] Figure 4 It is threaded connection type flange structure schematic view of the utility model;

[0023] Figure 5 It is hexagonal head bolt fixed structure schematic view of the utility model.

[0024] In the drawing: 1, pipeline;2, first flange;3, threaded hole;4, through -hole;5, nut;6, hexagonal head bolt;7, second flange;8, threaded sleeve;9, wave tooth composite gasket. DETAILED DESCRIPTION

[0025] The utility model will be further explained in detail in connection with examples:

[0026] Example 1

[0027] As Figure 1-5 The utility model discloses a flange sealing structure, including pipeline 1, the one end of pipeline 1 is installed with first flange 2, the top of first flange 2 is equipped with threaded hole 3, the top of threaded hole 3 is installed with wave tooth composite gasket 9, the top of threaded hole 3 is equipped with through -hole 4, the side of first flange 2 is movably connected with nut 5, the inner wall of nut 5 is connected with hexagonal head bolt 6, one end of hexagonal head bolt 6 is connected with second flange 7, the side of second flange 7 is installed with threaded sleeve 8.

[0028] In this embodiment, by providing the first flange 2, the threaded hole 3, the second flange 7, the threaded sleeve 8, and the corrugated composite gasket 9, the threaded hole 3 and the threaded sleeve 8 can be used to achieve a tight threaded connection between the first flange 2 and the second flange 7 without affecting the installation of the corrugated composite gasket 9, thereby greatly improving the close contact between the first flange 2 and the second flange 7. At the same time, the corrugated composite gasket 9 can maintain excellent sealing performance for a long time when the temperature and pressure are prone to fluctuate.

[0029] Example 2

[0030] like Figure 1-5 As shown, based on Example 1, the utility model provides a technical solution: preferably, the size of the inner wall of the threaded hole 3 is consistent with the size of the outer wall of the threaded sleeve 8, and the outer wall of the threaded sleeve 8 is tightly threadedly connected to the inner wall of the threaded hole 3, one side of the corrugated composite gasket 9 is fit-fitted to the bottom of the inner wall of the threaded hole 3, and the size of the corrugated composite gasket 9 is consistent with the size of the inner wall of the threaded hole 3.

[0031] In this embodiment, the use of threaded holes 3 and threaded sleeves 8 enables a tight connection between the first flange 2 and the second flange 7, effectively preventing gas leakage caused by thermal deformation of the gasket. This design also occupies minimal space and significantly improves the flange's sealing performance. The use of corrugated composite gaskets 9 and threaded holes 3 maintains high sealing performance even under very low compressive stress, making it suitable for sizes ranging from DNL0 pipe flanges to DN2500 container flanges. This design maintains excellent sealing performance over time, even in environments subject to temperature and pressure fluctuations.

[0032] Example 3

[0033] like Figure 1-5 As shown, based on Example 1, the utility model provides a technical solution: preferably, eight groups of hexagonal head bolts 6 are provided, and the eight groups of hexagonal head bolts 6 are arranged in a circular array on the top of the second flange 7, and the eight groups of hexagonal head bolts 6 are uniformly spaced on the top of the second flange 7, one end of the hexagonal head bolt 6 is tightly threadedly connected to the inner wall of the through hole 4 on the top of the first flange 2 and the second flange 7, and the bolt head of the hexagonal head bolt 6 is fitly connected to the top of the second flange 7.

[0034] In this embodiment, the use of the hexagonal head bolts 6 and the second flange 7 reduces the spacing between the hexagonal head bolts 6, so that the force of the hexagonal head bolts 6 is evenly transmitted to the gasket, obtaining a uniform and sufficient sealing pressure ratio, which can improve the sealing performance. At the same time, while meeting the space required for tightening and removing the bolts, increasing the number of bolts can also improve the sealing between the flanges. The use of the hexagonal head bolts 6, the second flange 7 and the first flange 2, the design structure and fastening method of the hexagonal head bolts 6 can optimize the sealing performance of the flange joint, improve the tensile strength and corrosion resistance of the bolts, and increase the service life of the flange joint.

[0035] The following is a detailed description of the working principle of the flange sealing structure.

[0036] like Figure 1-5 As shown, first, eight groups of through holes 4 are opened on the top of the first flange 2 and the threaded hole 3 and the second flange 7 and the threaded sleeve 8 and the corrugated composite gasket 9. When two groups of pipelines 1 need to be connected, the threaded sleeve 8 on the second flange 7 is threadedly connected with the threaded hole 3 on the first flange 2. When the through hole 4 on the threaded sleeve 8 completely coincides with the through hole 4 on the threaded hole 3, the threaded sleeve 8 will fit and connect with the corrugated composite gasket 9 on the top of the threaded hole 3. The corrugated composite gasket 9 can be used in high and low temperature (-200℃~+700℃), high , low pressure, vacuum (vacuum ~ 25mpa) and other occasions with very low compressive stress and maintain high sealing for a long time. When the first flange 2 and the threaded hole 3 and the second flange 7 and the threaded sleeve 8 and the corrugated composite gasket 9 and the through hole 4 on the top of the nut 5 are completely overlapped, the eight sets of hexagonal head bolts 6 are installed. The advantage of the hexagonal head bolts 6 over ordinary bolts is that the design structure and fastening method of the hexagonal head bolts 6 can optimize the sealing performance of the flange joint, improve the tensile strength and corrosion resistance of the bolts, and increase the service life of the flange joint.

[0037] The above generally describes the present invention in detail. However, it is obvious to those skilled in the art that modifications or improvements may be made to the present invention. Therefore, modifications or improvements that do not depart from the spirit of the present invention are within the scope of protection of the present invention.

Claims

1. A flange sealing structure, comprising a pipeline (1), characterized in that: A first flange (2) is installed at one end of the pipeline (1), a threaded hole (3) is provided at the top of the first flange (2), a wave tooth composite gasket (9) is installed at the top of the threaded hole (3), a through hole (4) is provided at the top of the threaded hole (3), a nut (5) is movably connected to one side of the first flange (2), a hexagonal bolt (6) is connected to the inner wall of the nut (5), one end of the hexagonal bolt (6) is connected to a second flange (7), and a threaded sleeve (8) is installed at one side of the second flange (7).

2. A flange sealing structure according to claim 1, characterized in that: The size of the inner wall of the threaded hole (3) is consistent with the size of the outer wall of the threaded sleeve (8), and the outer wall of the threaded sleeve (8) is tightly threadedly connected to the inner wall of the threaded hole (3).

3. The flange sealing structure according to claim 1, characterized in that: One side of the corrugated composite gasket (9) is fitted and connected to the bottom of the inner wall of the threaded hole (3), and the size of the corrugated composite gasket (9) is consistent with the size of the inner wall of the threaded hole (3).

4. The flange sealing structure according to claim 1, characterized in that: The hexagonal head bolts (6) are provided in eight groups, and the eight groups of hexagonal head bolts (6) are arranged in a circumferential array on the top of the second flange (7), and the eight groups of hexagonal head bolts (6) are spaced uniformly on the top of the second flange (7).

5. The flange sealing structure according to claim 1, characterized in that: One end of the hexagonal bolt (6) is tightly threadedly connected to the inner wall of the through hole (4) on the top of the first flange (2) and the second flange (7), and the bolt head of the hexagonal bolt (6) is fitted and connected to the top of the second flange (7).

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