Simple large pull rod flange connection axial compensator

Abstract

The utility model discloses a simple large pull rod flange connection axial compensator, which belongs to a pipeline compensation element, structurally comprises a corrugated pipe, flanges and lug plates at the two ends of the corrugated pipe, a pull rod and the like, and is mainly characterized in that connecting pipes are respectively arranged at the two ends of the corrugated pipe, and a plurality of lug plates which are circumferentially and uniformly distributed are uniformly arranged on the outer circumferential surface of the connecting pipe at each end; as the lug plates for connecting the pull rods are not welded and fixed on the outer circumferential surface of the flange any more, the radial height of the flange can be reduced, so that the use requirement on a pipeline bracket is reduced, the overall mounting condition of the axial compensator connected with the flange is also reduced, and the mounting efficiency of the axial compensator connected with the flange is improved. Especially, the lug plate and the flange are directly welded on the connecting pipe, and then the connecting pipe is welded with the corrugated pipe, so that the structure can be simplified, the product processing can be completed through conventional equipment, the whole processing is more convenient, the investment is small, the structure is relatively simple, the service life is long, and the device can be widely applied to occasions such as high-temperature and low-temperature gas and liquid.

Description

Technical Field

[0001] This utility model relates to an axial compensator for flange connection, specifically a simple large tie rod flange connection axial compensator. Background Technology

[0002] Flange-connected axial compensators are a type of pipeline compensation element. They primarily utilize the effective expansion and contraction of their bellows-based working body to absorb dimensional changes in pipelines, ducts, and containers caused by thermal expansion and contraction, or to compensate for axial, lateral, and angular displacements. They can also be used for noise reduction and vibration damping, making them widely used in modern industry. Currently, the structure of a flange-connected axial compensator mainly consists of a bellows, flanges and lugs installed at both ends of the bellows, and tie rods connecting the lugs. The lugs are typically welded to the outer circumference of the flange, which can easily result in excessive radial height of the flange. This increases the requirements for pipeline supports and raises the overall installation requirements of the flange-connected axial compensator. Furthermore, the structure is relatively complex, hindering overall machining and making it impossible to process the product using conventional equipment. Utility Model Content

[0003] The technical problem to be solved by this utility model is to overcome the defects of the prior art and provide a simple large tie rod flange connection axial compensator with simple structure, convenient processing, and reduced requirements for pipe supports and overall installation conditions.

[0004] The technical problem of this utility model is solved by the following technical solution:

[0005] A simple large tie rod flange connection axial compensator includes a bellows and flanges respectively installed at both ends of the bellows. Each end of the bellows is provided with a connecting pipe, and each connecting pipe has a number of circumferentially distributed lugs on its outer circumferential surface. The lugs on the connecting pipes at both ends correspond one-to-one and are connected to each other by a tie rod.

[0006] The inner end of the connecting pipe is provided with a coaxially extending insert pipe. The outer diameter of the insert pipe is smaller than the outer diameter of the connecting pipe. The inner end of the connecting pipe is fitted into the end of the bellows via the insert pipe, and the inner end of the connecting pipe and the end of the bellows are circumferentially welded and fixed.

[0007] The flange is fitted onto the outer end of the connecting pipe through the central hole and fixed by circumferential welding.

[0008] The aforementioned connector is a cylindrical straight pipe.

[0009] Compared with the prior art, the present invention mainly adds connecting pipes to both ends of the bellows, and provides several circumferentially distributed ear plates on the outer circumferential surface of each connecting pipe. The ear plates on the connecting pipes at both ends are then connected to each other by tie rods. Since the ear plates for connecting the tie rods are no longer welded and fixed to the outer circumferential surface of the flange, the radial height of the flange can be reduced, thereby reducing the requirements for pipe supports and reducing the overall installation conditions of the flange-connected axial compensator. In particular, the direct welding of ear plates and flanges to the connecting pipes, and then welding the connecting pipes to the bellows, simplifies the structure and allows the product to be processed using conventional equipment, making the overall processing more convenient. Attached Figure Description

[0010] Figure 1 This is a cross-sectional view of the present invention.

[0011] Figure 2 This is a half-sectional view of the pipe assembly.

[0012] Figure 3 This is a schematic diagram of the ear plate structure.

[0013] Figure 4 This is a sectional view of the flange. Detailed Implementation

[0014] The embodiments of this utility model will now be described in detail with reference to the accompanying drawings.

[0015] like Figures 1-4 As shown, 1. Bellows, 2. Flange, 21. Center hole, 22. Mounting hole, 3. Tie rod, 4. Nut, 5. Connecting pipe, 51. Inserting pipe, 6. Ear plate, 61. Connecting hole.

[0016] A simple large tie rod flange connection axial compensator, such as Figure 1 As shown, this is a type of pipeline compensation element. Its structure mainly includes a bellows 1, flanges 2 and lugs 6 installed at both ends of the bellows, and tie rods 3 connecting the lugs 6 at both ends.

[0017] The corrugated pipe 1 is a stainless steel corrugated pipe, which can compensate for the displacement caused by temperature difference and pressure difference in the pipeline.

[0018] The corrugated pipe 1 is provided with connectors 5 at both ends. The specific structure is as follows: the inner end of the connector 5 is provided with a coaxially extending insertion connector 51. The outer diameter of the insertion connector is smaller than the outer diameter of the connector. Therefore, the inner end of the connector 5 is fitted into the end of the corrugated pipe 1 through the insertion connector 51, that is, fitted into the straight pipe section at the end of the corrugated pipe 1. The inner end of the connector 5 and the end of the corrugated pipe 1 are circumferentially welded and fixed.

[0019] The connecting pipe 5 is a cylindrical straight pipe. Each flange 2 is fitted onto the outer end of the connecting pipe 5 through a central hole 21 and fixed by circumferential welding. The central hole 21 is formed through the axis of the flange 2. Several mounting holes 22 are also provided on the flange 2. These mounting holes are evenly distributed circumferentially around the central hole 21, and mainly serve to connect the corrugated compensator to the adjacent pipe port (not shown in the figure).

[0020] Each end connector 5 has a plurality of circumferentially distributed lugs 6 on its outer circumferential surface. Each lug is welded and fixed to the connector 5. The number of lugs 6 on both ends of the connector 5 is equal and their positions correspond. Therefore, the lugs 6 on both ends of the connector 5 can be connected by the pull rod 3. Figure 1 As shown, the end of the pull rod 3 is directly and adjustablely connected to the connection hole 61 of the ear plate 6 via the nut 4.

[0021] Meanwhile, compared with conventional single axial compensators, the tie rod 3 of this utility model needs to be strengthened. It works together with the ear plate 6 to prevent the bellows 1 from being damaged, and also has functions such as adjusting the product length and hoisting. The ear plate 6 plays a role in protecting the bellows 1 and adjusting and hoisting the product.

[0022] In this way, since the lug 6 for connecting the tie rod 3 is no longer welded and fixed to the outer circumference of the flange 2, the radial height of the flange can be reduced, the requirements for pipe supports can be reduced, and the overall installation conditions of the flange connection axial compensator can be reduced. In particular, the lug 6 and flange 2 are directly welded to the pipe 5, and then the pipe 5 is welded to the bellows 1, which simplifies the structure and makes the product processing more convenient, even with conventional equipment.

[0023] This utility model requires little investment, has a relatively simple structure, and a wide range of applications. It can be used in high and low temperature gas and liquid applications. In addition to fully utilizing the compensation function, it can more effectively prevent expansion joint failure and effectively improve service life compared to conventional single axial compensators.

[0024] The embodiments described above are for illustrative purposes only and are not intended to limit the scope of the present invention. Furthermore, it should be understood that after reading the teachings of this invention, those skilled in the art can make various alterations or modifications to the invention, and these equivalent forms also fall within the scope defined by the appended claims.

Claims

1. A simple large tie rod flange connection axial compensator, comprising a bellows (1) and flanges (2) respectively installed at both ends of the bellows, characterized in that... The corrugated pipe (1) is provided with connecting pipes (5) at both ends. Each connecting pipe has several circumferentially distributed ear plates (6) on its outer circumferential surface. The ear plates (6) on the connecting pipes (5) at both ends correspond one to one and are connected to each other by a pull rod (3). The inner end of the connecting pipe (5) is provided with a coaxially extending insertion pipe (51). The outer diameter of the insertion pipe is smaller than the outer diameter of the connecting pipe. The inner end of the connecting pipe (5) is fitted into the end of the corrugated pipe (1) through the insertion pipe (51), and is circumferentially welded and fixed between the inner end of the connecting pipe (5) and the end of the corrugated pipe (1).

2. The simplified large tie rod flange connection axial compensator according to claim 1, characterized in that... The flange (2) is fitted onto the outer end of the connecting pipe (5) through the central hole (21) and fixed by circumferential welding.

3. The simplified large tie rod flange connection axial compensator according to claim 1, characterized in that... The aforementioned connector (5) is a cylindrical straight pipe.

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