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High-temperature expansion joint with novel temperature channeling prevention structure

A high-temperature expansion and anti-channeling technology, applied in the field of high-temperature expansion joints, can solve problems such as poor structural stability of the cantilever beam, high temperature at the joint between the inner lining and the connecting pipe, and inner lining falling off, so as to achieve enhanced stability and safety, scalability and Good sealing, avoiding the effect of falling off or disengaging

Pending Publication Date: 2020-08-28
CHENGUANGDONGLUO BELLOWS CO LTD NANJING
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Moreover, under high temperature conditions, the temperature difference between the wear-resistant lining of different materials and the lining metal component is obvious, and there is no transition in temperature. The rapid release of temperature may cause local high temperature at the connection between the lining and the connecting pipe, and the thermal stress of the weld will also increase. Big
In addition, the lining metal components are longer and thicker, and the structural stability of the cantilever beam is poor, which can easily lead to cracking of the weld or failure of the connection, causing the lining to fall off, making the bellows directly in contact with high-temperature media, and causing erosion damage to the bellows. The bellows will affect the safe and stable operation of the piping system without temperature protection and medium protection, and the reliability is poor, which will greatly shorten the life of the expansion joint or directly fail
The damage caused by the phenomenon of temperature shifting is very common in practical applications, which will bring certain economic losses. This defect has always been a technical problem to be solved in the industry

Method used

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  • High-temperature expansion joint with novel temperature channeling prevention structure
  • High-temperature expansion joint with novel temperature channeling prevention structure
  • High-temperature expansion joint with novel temperature channeling prevention structure

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0033] combine figure 1 , figure 2 , image 3 , Figure 4 , Figure 5 , Figure 6 , Figure 7 and Figure 8As shown, the high-temperature expansion joint of a new anti-channeling structure disclosed by the present invention is characterized in that it includes a cold wall connecting pipe 1, a bellows section 2 can be provided on the cold wall connecting pipe 1, and the two ends of the bellows section 2 can be connected with the cold wall Wall connection 1 welded connection or bolted compression connection. The second hemming tapered lining device 4 and the first hemming conical lining device 3 can be welded with the cold wall adapter 1 respectively, and the second hemming conical lining device 4 can be connected with the first hemming conical The liner device 3 is inserted and connected, the bellows section 2 can be provided with a heat-insulating soft layer 5, and the inside of the cold wall connecting pipe 1 can be provided with a wear-resistant lining 6. The wear-re...

Embodiment 2

[0036] In the embodiment of the present invention, the second flanged tapered bushing device 4 can be inserted into the first flanged tapered bushing device 3 and can be in a V-shaped or U-shaped symmetrical shape, and the bellows section 2 can be placed Outside the groove shape produced by V-shaped or U-shaped symmetry, the length of the second hemmed tapered bushing device 4 connected to the first hemmed tapered bushing device 3 can be greater than the length of the bellows section 2, The V-shaped or U-shaped first hemming tapered lining device 3 and the second hemming tapered lining device 4 can protect the heat-insulating soft layer 5 and prevent the heat-insulating soft layer 5 from falling off or disengaging. temperature. Ensure that the first hemming tapered lining device 3 and the second hemming tapered lining device 4 can provide good and stable protection for the heat insulation soft layer 5 and the bellows section 2, and ensure that the bellows section 2 can pass th...

Embodiment 3

[0038] Refer to attached figure 1 As shown, in a specific embodiment of the present invention, the thermal insulation lining 7 is fixed on the cold wall joint 1 by anchor nails. In high-temperature working conditions that do not require wear-resisting conditions, only the temperature-insulating lining 7 is sufficient, and there is no need to wear the wear-resistant lining 6; Warm lining layer 7 inboards play wear-resistant lining 6, can play good wear-resisting protection like this.

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PUM

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Abstract

The invention belongs to the field of petrochemical engineering, and particularly relates to a high-temperature expansion joint with a novel temperature channeling prevention structure. The high-temperature expansion joint comprises a cold wall connecting pipe, a corrugated pipe section is arranged on the cold wall connecting pipe, a first edgefold conical lining frame device is arranged on the inlet side in the cold wall connecting pipe, a second edgefold conical lining frame device is arranged on the outlet side in the cold wall connecting pipe, the first edgefold conical lining frame deviceand the second edgefold conical lining frame device are assembled in a sleeved mode, an enough expansion gap is reserved, a heat insulation soft layer is arranged between the corrugated pipe sectionand the first edgefold conical lining frame device and the second edgefold conical lining frame device, a wear-resistant lining is arranged on the innermost side of the cold wall connecting pipe, anda thermal insulation lining layer is arranged between the wear-resistant lining and the cold wall connecting pipe. By means of the first edgefold conical lining frame device and the second edgefold conical lining frame device, the heat insulation soft layer can be effectively protected, so that the heat insulation soft layer can not lose efficacy, meanwhile, internal high temperature is transitedoutwards gently, the transition uniformity of the temperature is good, so that a weld joint is not prone to cracking, thus the temperature channeling protection performance is good, and the operationsafety and reliability are good.

Description

technical field [0001] The invention belongs to the technical field of the petrochemical industry, relates to a cold-wall pipeline expansion joint under high-temperature conditions, and in particular relates to a high-temperature expansion joint with a novel anti-channeling structure. Background technique [0002] Today, the petrochemical industry as the foundation of the pillar industry is developing relatively rapidly. Usually, in some cold wall pipelines under high temperature conditions, expansion joints are needed to absorb the axial displacement, lateral displacement, angular displacement, etc. of the pipeline, and the expansion joints also need to take certain temperature insulation measures to ensure the production and operation of the piping system. In the existing expansion joint structure for high-temperature cold-wall pipelines, both sides of the bellows are welded to the inner wall of the connecting pipe with ring-shaped L-shaped platform-shaped lining metal fra...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): F16L51/02F16L59/02F16L57/04
CPCF16L51/02F16L59/028F16L57/04
Inventor 孙茜茜
Owner CHENGUANGDONGLUO BELLOWS CO LTD NANJING