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Method for hole sealing by means of expansion manner

A hole and linear expansion coefficient technology, applied in heat exchanger sealing devices, heat exchanger fixing, heat exchange equipment, etc., can solve the problems of the failure of the surrounding hole sealing structure, affecting the sealing performance of the surrounding holes, and the plastic deformation of the inner wall of the tube hole. , to achieve good blocking effect, gentle stress, and large contact sealing area.

Inactive Publication Date: 2020-03-31
国家能源集团泰州发电有限公司
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Problems solved by technology

The use of this plugging method is likely to cause plastic deformation of the inner wall of the pipe hole, which will cause a sudden change in stress in the surrounding holes, which in turn will affect the sealing performance of the surrounding holes, and eventually lead to the successive failure of the sealing structures of the surrounding holes

Method used

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  • Method for hole sealing by means of expansion manner
  • Method for hole sealing by means of expansion manner
  • Method for hole sealing by means of expansion manner

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Embodiment Construction

[0028] It should be noted that the words "inside" and "outside" used in the description of the present invention respectively refer to the direction toward or away from the geometric center of a specific component (such as "hole", etc.), which are only for the convenience of describing the present invention and Simplified descriptions, rather than indicating or implying that the device or element referred to must have a particular orientation, be constructed and operate in a particular orientation, and thus should not be construed as limiting the invention.

[0029] A method of hole plugging by means of expansion:

[0030] The densely distributed holes 1 on the metal tube sheet 0 of the heat exchanger are all in the shape of cylindrical sleeves, and the diameter of a single hole 1 is 65 mm.

[0031] (1) Process a cylindrical metal plug with a material of No. 7 zinc alloy and a radial outer diameter (diameter) of 65.5mm at room temperature. The inside of the cylindrical metal p...

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Abstract

The invention relates to a process of sealing dense holes on a metal plate, in particular to a method for hole sealing by means of an expansion manner. A cylindrical metal plug with a high linear expansion coefficient is used, the cooling and contracting cylindrical metal plug is inserted into a hole, the cylindrical metal plug is waited for returning to normal temperature in the hole, and the outer end of the plug and the edge of the hole is welded and sealed to further ensure the sealing effect of the plug to the hole.

Description

technical field [0001] The invention relates to a process for sealing dense holes on a metal plate, in particular to a method for sealing holes by means of expansion. Background technique [0002] In the prior art, the hole plugging of the heat exchanger tube sheet mainly uses the impact load to squeeze the conical plug into the tube hole. The plug structure is as follows: figure 2 shown. The use of this plugging method is likely to cause plastic deformation of the inner wall of the pipe hole, which will cause a sudden change in stress in the surrounding holes, which in turn will affect the sealing performance of the surrounding holes, and eventually lead to successive failures of the sealing structures of the surrounding holes. Contents of the invention [0003] In order to solve the above-mentioned technical problems, the present invention provides a method for sealing holes by means of expansion, which is especially suitable for sealing dense holes on heat exchanger tu...

Claims

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Application Information

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IPC IPC(8): F28F11/02
CPCF28F11/02F28F2275/06
Inventor 蒋欣军何利军汤淳坡周龙孙志强陈忠兵尹少华
Owner 国家能源集团泰州发电有限公司
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