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Vacuum-pumping system

A technology of vacuum pumping system and vacuum pump, applied in the field of vacuum pumping system, can solve the problems of lower qualification rate of brazing products and de-soldering of heat exchangers, and achieve the effect of shortening pumping time, reducing internal and external leakage rate, and improving production capacity.

Active Publication Date: 2013-08-28
北京中科富海低温科技有限公司
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Problems solved by technology

If the water vapor is not removed in time during the brazing process, it will easily lead to desoldering of the heat exchanger, which will reduce the qualified rate of brazing products

Method used

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Embodiment Construction

[0021] The present invention will be described in further detail below in conjunction with the accompanying drawings and specific embodiments.

[0022] The invention provides a vacuum pumping system for vacuuming a vacuum heat processor (such as a vacuum brazing furnace) connected thereto. The vacuum pumping system includes a vacuum pump and a cold trap. To obtain a vacuum degree, the cold trap is arranged between the vacuum heat processor and the vacuum pump for removing water vapor and return oil of the vacuum heat processor.

[0023] see figure 1 , the present invention takes the vacuum brazing furnace 200 as a vacuum heat processor as an example to illustrate a vacuum pumping system 100 provided by the first embodiment of the present invention. The vacuum system 100 is used for vacuuming the vacuum brazing furnace 200 connected thereto. The vacuum system 100 includes a vacuum pump 10 and a cold trap 20 . The vacuum pump 10 evacuates the vacuum brazing furnace 200 to obt...

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Abstract

The invention provides a vacuum-pumping system used for vacuum pumping of a vacuum heater treater connected with the vacuum-pumping system. The vacuum-pumping system comprises a vacuum pump obtaining the vacuum degree for the vacuum heater treater. The vacuum-pumping system further comprises a cold trap which is arranged between the vacuum heater treater and the vacuum pump. The vacuum-pumping system can quickly absorb water vapor and oil vapor by means of the cold trap, the pump-down time is shortened, the vacuum heater treater can quickly achieve a vacuumized state, quality of heat treatment products can be effectively guaranteed, production capacity of the vacuum heater treater is improved, in terms of vacuum brazing, quality of the vacuum brazing can be effectively improved, the leakage rates of the inside and the outside of a brazing heat exchanger are reduced, the rate of finished products of the heat exchanger is thereby improved, and additionally, the vacuum-pumping system is strong in adaptability, is not limited to be used for a vacuum brazing furnace and is suitable for other vacuum heater treaters.

Description

technical field [0001] The invention relates to a vacuum pumping system, in particular to a vacuum pumping system capable of effectively removing water vapor and returned oil from a vacuum heat processor. Background technique [0002] Plate-fin heat exchangers are widely used in petrochemical and other fields because of their high heat transfer efficiency, compact structure, strong adaptability, and good economic effects. In the manufacturing process of plate-fin heat exchangers, vacuum brazing technology has a series of unique advantages and potential application prospects, such as easy operation, no need for complicated cleaning work before and after welding, high production efficiency, and no pollution to the environment. And develop rapidly around the world. [0003] Vacuum brazing is to heat the material to be connected to an appropriate temperature under a certain degree of vacuum, and melt the filling material, and use capillary action to make the liquid solder fill ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B23K3/08B23K3/00
Inventor 徐鹏龚领会刘辉明徐冬李来风陈杰高金林
Owner 北京中科富海低温科技有限公司
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