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Maintaining structure and method for leakage stoppage of double-tube-sheet heat exchanger

A double tube sheet heat exchanger and heat exchanger technology, which is applied in the field of double tube sheet heat exchanger maintenance

Active Publication Date: 2016-11-16
YICHANG CSG POLYSILICON CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0002] After cracks appear in the tube bundle of the double-tube-sheet heat exchanger device, if the conventional method is used for maintenance, that is, the plugs at both ends are used to seal, which cannot solve the problem that the medium in the middle of the shell enters the cavity between the two tube sheets through the tube bundle

Method used

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  • Maintaining structure and method for leakage stoppage of double-tube-sheet heat exchanger

Examples

Experimental program
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Effect test

Embodiment 1

[0018] Such as figure 1 As shown, a plugging maintenance structure of a double tube sheet heat exchanger includes a first tube sheet 1 and a second tube sheet 2 at one end of the heat exchanger, a tube bundle 3 is installed between them, and the second tube sheet 2 is close to the heat exchanger. The middle part of the shell of the heater is characterized in that: a support cylinder 4 is installed in the tube bundle 3, a tie rod 5 is installed in the support cylinder, a packing layer 6 is arranged in the tube bundle 3 at the second tube plate 2, and the tie rod 5 is close to the second tube The end of the plate 2 presses the packing layer 6; the support tube 4 is provided with an internal thread, and the outside of the tie rod 5 is provided with an external thread, and the internal thread matches the external thread.

[0019] Further, the length of the support cylinder 4 is equal to the distance between the first tube sheet 1 and the second tube sheet 2, and the length of the ...

Embodiment 2

[0029] 1. When cracks appear in the tube bundle of the double-tube-sheet heat exchanger device, first check the distance between the two tube sheets at one end of the heat exchanger through the drawings; then increase the length by 30-50mm to be L. Due to the different specifications of the tube bundles of different heat exchangers, the plugging repair rod can only be processed through the inner diameter of the tube bundle. Now take the tube bundle with an inner diameter of Ф20mm as an example. Process two cylinders with an outer diameter of Ф19.5mm and a thickness of 15mm, one of which is processed with an M12 thread to obtain the first sleeve, and the other is processed with a Ф12mm through hole to obtain the second sleeve; take a section of Ф18mm stainless steel pipe, The length is L-30mm; the processed first sleeve and the second sleeve are respectively welded to both ends of the stainless steel pipe, and the support tube is completed; the processing diameter is Ф11.5mm, an...

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Abstract

The invention discloses a maintaining structure and method for leakage stoppage of a double-tube-sheet heat exchanger. The maintaining structure comprises a first tube sheet and a second tube sheet which are arranged at one end of the heat exchanger; a tube bundle is mounted between the first tube sheet and the second tube sheet; and the second tube sheet is close to the middle part of a shell layer of the heat exchanger. The maintaining structure is characterized in that a supporting cylinder is mounted in the tube bundle, a pull rod is mounted in the supporting cylinder, a packing layer is arranged in the tube bundle at the second tube sheet, and the packing layer is tightly pressed by the end part, close to the second tube sheet, of the pull rod; and an internal thread is arranged inside the supporting cylinder, an external thread is arranged outside the pull rod, and the internal thread is matched with the external thread. According to the maintaining structure, the packing layer is compressed by virtue of a force generated by a thread pair located between the pull rod and the supporting cylinder, a heat exchanging pipeline is packed by virtue of the deformation of the packing layer, two cavities are separated, and the problem that a medium located in the middle of the shell layer enters the cavities located between the two tube sheets through the tube bundle is solved.

Description

technical field [0001] The invention relates to the field of maintenance of double-tube-sheet heat exchangers, in particular to a leak-stopping maintenance structure and maintenance method of double-tube-sheet heat exchangers. Background technique [0002] After cracks appear in the tube bundle of the double-tube-sheet heat exchanger device, if it is repaired by conventional methods, that is, plugging at both ends is used, which cannot solve the problem that the medium in the middle of the shell enters the cavity between the two tube sheets through the tube bundle. Contents of the invention [0003] The technical problem to be solved by the present invention is to provide a plugging maintenance structure and maintenance method for a double-tube-sheet heat exchanger, which can effectively prevent the medium in the middle of the shell from entering the cavity between the two tube-sheets through the tube bundle. [0004] In order to solve the above technical problems, the tec...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B23P6/04
CPCB23P6/04
Inventor 刘云安刘勇
Owner YICHANG CSG POLYSILICON CO LTD