Tube plate welding method, tube body and tube plate connecting method and heat exchanger

A technology of tube-sheet welding and tube-sheet connection, applied in heat exchanger shells, welding equipment, welding equipment, etc., can solve the problems of extremely high welding quality requirements, connection and sealing defects, etc., to reduce welding quality requirements and reduce rigidity Destruction chance and stability-enhancing effects

Active Publication Date: 2022-02-01
常州新海飞金属制品有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] Among them, the axial and radial fixation of the tube body and the sealing of the medium in the heat exchanger need to be guaranteed by the welding position of the tube sheet and the tube body. In this way, the requirements for welding quality are extremely high, and it is easy to In the process of subsequent use, the connection and sealing defects are caused by the problems in the welding position

Method used

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  • Tube plate welding method, tube body and tube plate connecting method and heat exchanger
  • Tube plate welding method, tube body and tube plate connecting method and heat exchanger
  • Tube plate welding method, tube body and tube plate connecting method and heat exchanger

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0044] Such as figure 1 and 2 As shown, a tube sheet welding method is used for welding a tube sheet composed of a plate body 1, a sealing flat gasket 2 and an intermediate body 3; the plate body 1 includes a number of through holes; the intermediate body 3 includes a hollow cylinder section 31 And the convex edge 32, the outer wall of the hollow cylinder section 31 is attached to the inner wall of the through hole, and the convex edge 32 is drawn radially from one end of the hollow cylinder section 31; the flat sealing gasket 2 is flat, and is sandwiched between Between the plate body 1 and the convex edge 32;

[0045] Such as image 3 As shown, the tube sheet welding method includes the following steps:

[0046] S1: fixed plate body 1;

[0047] S2: Put the sealing flat gasket 2 on the periphery of the hollow cylinder section 31, insert the hollow cylinder section 31 into the through hole from one end of the plate body 1 until the convex edge 32 presses the sealing flat g...

Embodiment 2

[0069] Such as Figure 9 As shown, the method for connecting the tube body 5 to the tube sheet includes the following steps:

[0070] A1: Put the sealing flat gasket 2 on the periphery of the hollow cylinder section 31, insert the hollow cylinder section 31 into the through hole from one end of the plate body 1, and press the sealing flat gasket 2 to one side of the plate body 1 until the convex edge 32 on the side surface;

[0071] A2: Fixed plate body 1;

[0072] A3: Apply pressure to the convex edge 32 through the mold 4. The pressing position of the mold 4 is the annular protrusion 41. The axis of the annular protrusion 41 coincides with the axis of the hollow cylinder section 31. Squeeze so that the convex edge 32 faces the plate body 1 protruding, and forming an annular depression on the surface of the plate body 1 by pressing the plate body 1;

[0073] A4: The sealing flat gasket 2 is sandwiched between the annular depression and the protruding part of the convex edg...

Embodiment 3

[0078] Such as Figure 10 As shown, the method for connecting the tube body 5 to the tube sheet includes the following steps:

[0079] B1: Put the sealing flat gasket 2 on the periphery of the hollow cylinder section 31, insert the hollow cylinder section 31 into the through hole from one end of the plate body 1, and press the sealing flat gasket 2 to one side of the plate body 1 until the convex edge 32 on the side surface;

[0080] B2: fixed plate body 1;

[0081] B3: Insert the pipe body 5 from the other side of the hollow cylinder section 31 relative to the set end of the convex edge 32, until the end of the pipe body 5 reaches the end of the hollow cylinder section 31, and ensure that the O-ring is in contact with the hollow cylinder section 31 The inner wall is bonded to achieve sealing;

[0082] B4: Apply pressure to the convex edge 32 through the mold 4. The pressing position of the mold 4 is the annular protrusion 41. The axis of the annular protrusion 41 coincides...

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Abstract

The invention relates to the technical field of metal structure machining, in particular to a tube plate welding method which comprises the following steps: fixing a plate body; arranging a sealing flat gasket on the periphery of a hollow cylinder section in a sleeving mode, the hollow cylinder section being inserted into the through hole from one end of the plate body; applying pressure to a convex edge through a die to protrude towards the plate body, and extruding the plate body to form an annular recess on the surface of the plate body; clamping the sealing flat gasket between the annular recess and the convex part of the convex edge; and keeping the pressing state, carrying out welding on the other side of the hollow cylinder section, and fixedly connecting the middle body and the plate body. According to the invention, the stability and the sealing performance of the relative position after the tube plate and the tube body are connected are guaranteed, the welding quality requirement can be properly lowered, the purpose of solving the sealing problem is achieved to a certain degree through the obtained tube plate by using the intermediate, so that the welding requirement is effectively lowered. The invention further discloses a tube body and tube plate connecting method and a heat exchanger.

Description

technical field [0001] The invention relates to the technical field of metal structure processing, in particular to a tube plate welding method, a tube body and tube plate connection method and a heat exchanger. Background technique [0002] The current tube sheet is to drill a through hole slightly larger than the outer diameter of the tube on the circular steel plate. It is a plate form that fixes the tube body and seals the medium in the heat exchanger. When used, the tube body is penetrated and welded. fixed. [0003] Among them, the axial and radial fixation of the tube body and the sealing of the medium in the heat exchanger need to be guaranteed by the welding position of the tube sheet and the tube body. In this way, the requirements for welding quality are extremely high, and it is easy to In the process of subsequent use, defects in connection and sealing are caused by problems in welding positions. Contents of the invention [0004] The invention provides a tu...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B23K31/02B23K37/00F28F9/18
CPCB23K31/02B23K37/00F28F9/18
Inventor 耿鑫杨丹
Owner 常州新海飞金属制品有限公司
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