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Method and device for manufacturing surface porous heat transfer tubes

A technology of surface porous and manufacturing method, which is applied in the manufacture of heat exchange tubes, the manufacturing method and device of surface porous heat exchange tubes, can solve the problems of long sintering time, low efficiency and high energy consumption, and achieves light weight and high efficiency. , the effect of uniform pores

Active Publication Date: 2015-10-07
江苏中圣压力容器装备制造有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0007] The purpose of the present invention is to solve the problems of long sintering time, high energy consumption and low efficiency caused by sintering the coating on the surface of the existing surface porous tube, and to invent a surface porous heat exchange tube heated by induction coils. manufacturing method, while providing a corresponding manufacturing device

Method used

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  • Method and device for manufacturing surface porous heat transfer tubes
  • Method and device for manufacturing surface porous heat transfer tubes
  • Method and device for manufacturing surface porous heat transfer tubes

Examples

Experimental program
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Effect test

Embodiment 1

[0029] A method for manufacturing a surface porous heat exchange tube, comprising the steps of:

[0030] a. Carry out pretreatment including dedusting and cleaning to the surface of the base pipe;

[0031] b. Metal powder, pore-forming agent and binder are 75-91% by weight of metal powder, 4-15% by weight of pore-forming agent, and 5-10% by weight of binder Mix uniformly to form a metal powder viscose coating; the metal powder is an alloy powder, and the alloy powder includes one or more of nickel-based alloy powder, iron-based alloy powder, cobalt-based alloy powder or copper-based alloy powder combination of species;

[0032] c. Coat the metal powder viscose coating on the surface of the base pipe with a coating thickness of 0.15~0.85mm;

[0033] d. Use an induction coil heating device for sintering. The induction coil adopts a hollow copper tube with an input medium frequency or high frequency alternating current (300-300000Hz or higher), and generates an alternating magn...

Embodiment 2

[0036] Such as figure 1 , 2 shown.

[0037] A device for manufacturing surface porous heat exchange tubes, which includes a fixed mounting base 1 and an induction coil 2, such as figure 1 As shown, one end of the fixed mounting base 1 is equipped with a friction feeding rod mechanism 3, and the other end is equally divided with nozzles 4, as shown in figure 2 As shown, the friction feeding rod mechanism is composed of a tapered friction roller and a driving mechanism. The number of said tapered friction rollers is three, and they are evenly distributed in the central hole in the fixed installation. Between the axes of the three tapered friction rollers The distance between them can be adjusted to meet the needs of different substrate diameters. The driving mechanism drives the conical friction roller to rotate and uses the friction force to push the base tube 5 forward so that the base tube sprayed by the nozzle enters the induction coil 2 for rapid heating and curing. Th...

Embodiment 3

[0039] Such as image 3 shown.

[0040] The difference between this embodiment and the second embodiment is the combination of manpower and machinery. First, the configured metal powder bonding paint is manually coated on the surface of the base tube, and the base tube is linearly moved into the induction coil by an additional tube delivery mechanism. , is heated to a predetermined temperature by the coil, kept for a short time, and starts to cool after leaving the coil, that is, the surface porous layer is obtained, and the processing and manufacturing of the surface porous heat exchange tube is completed.

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Abstract

The invention discloses a method and a device for manufacturing surface porous heat transfer tubes. The method is characterized by comprising the following steps: a, carrying out pretreatment of removing dust and washing on the surface of base tubes; b, uniformly mixing metal powder, a pore-forming agent and an adhesive according to a set ratio to form metal powder adhesive coating; c, coating the surfaces of the base tubes with the metal powder adhesive coating, wherein the thickness of the coating is 0.15 to 0.85mm; and d, sintering through an induction coil heating device, enabling the base tubes coated with the metal powder adhesive coating to continuously pass through the induction coil, sintering the base tubes while the base tubes are being moved forward for 20 to 50 seconds, and cooling the base tubes to obtain the surface porous heat transfer tubes. The method and the device are fast in heating speed, low in energy consumption, and high in efficiency.

Description

technical field [0001] The invention relates to high-efficiency heat exchange tube technology, in particular to a method and device for manufacturing a heat exchange tube with a coating on the surface, in particular to a method and device for manufacturing a heat exchange tube with a porous surface. Background technique [0002] The sintered surface porous tube has good boiling heat transfer performance, and it has a significant strengthening effect on the boiling heat transfer of various working media such as water, freon, liquid nitrogen, olefins, benzene, ethanol, etc., and its heat transfer coefficient It can reach 6~8 times of the same light tube, and can be used in reboilers, condensers, evaporators of petrochemical plants, natural gas liquefaction, refrigeration, air conditioning, ethylene glycol evaporation, seawater desalination, aerospace and other devices, so in The field of enhanced heat transfer has great application prospects. However, at present, the sinterin...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C23C24/08
Inventor 郭宏新刘世平刘丰练绵炎狄勇田朝阳
Owner 江苏中圣压力容器装备制造有限公司
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