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Heat exchange pipe plugging device, plugging tool, plugging system and plugging method

A technology for plugging devices and heat exchange tubes, which is applied to heat exchanger sealing devices, manufacturing tools, heat exchange equipment, etc., and can solve problems such as damage to anti-corrosion coatings, cracking and leakage of heat exchange tube nozzles, and safety incidents , to achieve the effect of improving work efficiency, short disassembly time, and simple construction

Active Publication Date: 2021-04-09
CHINA PETROLEUM & CHEM CORP +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The traditional conical plug is not suitable for disassembly, its sealing performance is unpredictable, and it is easy to spray out from the nozzle during the pressure test
In addition, the materials in the process industry are flammable and explosive, and the heat exchange tubes must be thoroughly cleaned and purged before plugging, which is time-consuming and laborious, and is prone to safety incidents; during welding, welding stress will also cause damage to the nozzles of other heat exchange tubes. Cracking and leakage; for the tube sheet coated with anti-corrosion coating, this method will also cause damage to the anti-corrosion coating and increase the anti-corrosion cost of the tube sheet

Method used

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  • Heat exchange pipe plugging device, plugging tool, plugging system and plugging method
  • Heat exchange pipe plugging device, plugging tool, plugging system and plugging method
  • Heat exchange pipe plugging device, plugging tool, plugging system and plugging method

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Experimental program
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Effect test

Embodiment 1

[0036] Embodiment 1 This embodiment provides a heat exchange tube plugging device, the structure of which is as follows figure 1 As shown, it mainly includes: tension rod 21 , sealing ring 22 , pipe end sleeve 23 and nut 26 . Wherein, one end of the tension rod 21 is provided with an external thread, and the other end is a tapered body. The sealing ring 22 is sleeved on the outside of the cone.

[0037] The radius of the conical body of the tension rod 21 increases successively, and the radius of the bottom surface is slightly smaller than the inner diameter of the heat exchange tube 4, so that the axial force on the bottom surface of the conical body of the tension rod 21 is much greater than that received by the other surfaces of the tension rod after sealing. Axial force generated by pressure. There are more than two groups of sealing rings 22 set outside the conical body of the tension rod 21. The diameters of the outer rings of all the sealing rings are equal, and the d...

Embodiment 2

[0043] Embodiment 2 This embodiment provides a heat exchange tube sealing tool for cleaning the heat exchange tube and installing a heat exchange tube sealing device, such as figure 2 As shown, the plugging tool includes a sleeve 11 , a positioning device 12 and a preload setting rod 13 .

[0044] Such as image 3 As shown, the positioning device 12 includes a sleeve frame 121, which is square or rectangular. Two opposite openings are arranged on both sides of the sleeve frame, one of which is slightly larger than the other. When the sleeve 11 is placed in the sleeve frame 121 , the two ends of the sleeve 11 are respectively at two opening positions, and slightly protrude from the ends of the openings. The sleeve 11 can rotate around its own long axis in the sleeve frame 121 . A pair of bearings 123 are arranged in the frame, and the outer peripheral surface of the bearings 123 is in contact with the outer wall of the sleeve 11 to provide support for the rotation of the sl...

Embodiment 3

[0048] Embodiment 3 This embodiment provides a rapid plugging system for heat exchange tubes, such as Figure 4 As shown, the system includes the heat exchange tube sealing tool 1 and the heat exchange tube sealing device 2 described above. The heat exchange tube sealing device 2 is used for sealing the heat exchanger tube sheet 3 and the heat exchange tube pipe. The heat exchange tube plugging tool 1 is used for installation and disassembly of the heat exchange tube plugging device 2, and at the same time, it can also be used to clean the inside of the heat exchange tube.

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Abstract

The invention belongs to the technical field of pipeline construction, and relates to a pipeline end plugging device, system and method. The heat exchange pipe plugging device comprises a tensioning rod, a sealing ring and a pipe end sleeve. The tensioning rod is arranged in the pipe end sleeve, the sealing ring is arranged on the outer portion of the tensioning rod in a sleeving manner, the inner ring of the sealing ring is attached to the outer wall of the tensioning rod, and thte outer ring of the sealing ring is attached to the inner wall of the pipeline. The tensioning rod acts on the sealing ring through rotation and self-tightening to achieve pipe end sealing. According to the heat exchange pipe plugging device, plugging tool, plugging system and plugging method, construction is easy and convenient, plugging is reliable, high-risk operation such as welding and electricity utilization is not needed, sealing stress acts on the pipeline in a pipe plate, cracking of a pipeline welded junction of the pipe plate cannot be caused, the anticorrosive coating of the pipe plate is not stressed, damage to the anticorrosive coating cannot be caused, plugging and dismounting time is short, and working efficiency is greatly improved.

Description

technical field [0001] The invention belongs to the technical field of pipeline construction, and relates to a sealing device, system and sealing method for a pipeline end. Background technique [0002] The process industry uses a large number of heat exchangers. There are a large number of heat exchange tubes in these heat exchangers. Usually, materials with different temperatures are passed inside the heat exchange tubes and outside the heat exchange tubes, so as to achieve the purpose of heat exchange. In the case of leakage, if the production is not affected, the way of blocking the pipe is usually used to maintain the production. At present, conical plugs made of soft metal are often used for plugging heat exchange tubes. The head and the small head are placed in the heat exchange tube, and the end face of the big end of the plug is tapped with a copper hammer to seal it. For high-pressure heat exchange tubes, the nozzle and the plug need to be welded. The traditional...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): F28F11/02B25B27/02
CPCF28F11/02B25B27/02B25B27/0028
Inventor 黄贤滨陈文武单广斌谢守明
Owner CHINA PETROLEUM & CHEM CORP
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