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Large-diameter straight pipe pressure balance type expansion joint balanced by adopting external external-pressure corrugated pipe

A technology for pressing bellows and bellows, which is applied in the field of pressure-balanced expansion joints for large-diameter straight pipes. The effect of production quantity

Pending Publication Date: 2020-11-20
LUOYANG SUNRUI SPECIAL EQUIP
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

On the one hand, the huge pipe blind force brings challenges to the design of structural parts; on the other hand, the diameter of the required balance bellows will further increase, which greatly increases the difficulty of its manufacture

Method used

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  • Large-diameter straight pipe pressure balance type expansion joint balanced by adopting external external-pressure corrugated pipe
  • Large-diameter straight pipe pressure balance type expansion joint balanced by adopting external external-pressure corrugated pipe
  • Large-diameter straight pipe pressure balance type expansion joint balanced by adopting external external-pressure corrugated pipe

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0034] A large-diameter straight pipe pressure-balanced expansion joint with external external pressure bellows balance is used, and a working bellows 4 is provided. There are two end pipes connected to the two sides of the working bellows 4, and the outer sides of the end pipes on both sides are along the circumferential direction. There are multiple sets of tie rod assemblies 18 and multiple sets of peripheral bellows balance assemblies. The diameter of the working bellows 4 located in the center is much lower than the diameter of the original balance wave, and the overall outer diameter of the peripheral bellows balance components 19 arranged in multiple groups is also lower than the diameter of the original balance bellows.

[0035] Multiple groups of peripheral bellows balance components 19 are evenly distributed on the circumference of each end pipe, and the peripheral bellows balance components 19 are composed of a guide plate, an end ring, a force transmission cylinder ...

Embodiment 2

[0037] Such as Figure 6 , Figure 7 As shown in , in order to reduce the force arm of the end pipe assembly (the distance from the tie rod hole to the pipe), thereby reducing the bending stress and deformation deflection of the root weld of the end pipe assembly, and optimizing its stress state, a tie rod is set inside the external bellows Bellows, which play the role of medium sealing and isolating the tie rods, the peripheral bellows, tie rods, and the axes of the tie rods are coaxial, which can reduce the force of the tie rods on the bending arm of the end pipe assembly as a whole, and optimize its stress state and structural deformation , Reduce material consumption. The peripheral balance mechanisms on both sides of the working bellows are staggered to arrange the tie rods, and the bellows of the tie rods are displaced in the inner cavity of the outer bellows, which can reduce the axial length of the expansion joint as a whole.

[0038] On the basis of Example 1, an op...

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Abstract

The invention relates to a large-diameter straight pipe pressure balance type expansion joint balanced by adopting an external external-pressure corrugated pipe. The large-diameter straight pipe pressure balance type expansion joint is provided with a working corrugated pipe, the two sides of the working corrugated pipe each are connected with an end pipe, a plurality of pull rod assemblies and aplurality of external corrugated pipe balance assemblies are arranged on the outer sides of the end pipes on the two sides in the circumferential direction, a plurality of external corrugated pipe balance assemblies are evenly distributed in the circumferential direction of each end pipe, each external corrugated pipe balance assembly is composed of a guide plate, an end ring, an external pressurebalance body and a pressure connecting pipe, the guide plates and the end rings are arranged on the end pipe on the same side in a sleeving mode, the two ends of the external pressure balance bodiesare fixedly connected with the guide plates and the end pipes correspondingly, each external pressure balance body is provided with an external balance cavity defined by an external corrugated pipe and a connecting piece, the outer sides of the external corrugated pipes are located in the external balance cavities, and the external balance cavities communicate with the end pipe on the same side through the pressure connecting pipes. According to the large-diameter straight pipe pressure balance type expansion joint, the plurality of pull rod assemblies are uniformly distributed on each end pipe in the circumferential direction so that that the manufacturing difficulty of the expansion joint can be greatly reduced, and meanwhile the product cost is reduced.

Description

technical field [0001] The invention belongs to the field of flexible compensation of pipelines, in particular to a large-diameter straight pipe pressure-balanced expansion joint that adopts external equipment and external pressure bellows balance. Background technique [0002] Straight pipe pressure-balanced expansion joints can be used to compensate for the axial displacement of the pipeline. Structural parts are used to constrain the blind plate force of the pipe, and no blind plate force is output to the nozzle and support. The overall structure is as follows: figure 1 shown. The straight pipe pressure balance expansion joint used in conventional pipelines (less than 4 meters in diameter) usually consists of two sets of working bellows, a set of balanced bellows and other stressed structural parts. The diameter of the balance wave is 1.414 of the diameter of the working wave. Multiple sets of tie rods realize the transmission of balanced force, one end of which is respe...

Claims

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Application Information

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IPC IPC(8): F16L51/03
CPCF16L51/025F16L51/035
Inventor 闫廷来张道伟李杰杨玉强苏炎强李德雨
Owner LUOYANG SUNRUI SPECIAL EQUIP
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