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Vacuuming method for container by gas associating exchanging principle

A technology of vacuuming and stopping vacuuming, which is applied in non-pressure containers, liquid variable capacity machinery, gas/liquid distribution and storage, etc., can solve the problems of long vacuuming time and inability to maintain the vacuum degree of the container for a long time, and achieve The effect of shortening the time of vacuuming

Inactive Publication Date: 2007-09-19
SHANGHAI JIAOTONG UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

When using this method to evacuate, due to the degassing of the container wall, especially the existence of some gases that have a long degassing time, the vacuuming time of the container is very long, and the vacuum degree of the container cannot be maintained for a long time.

Method used

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  • Vacuuming method for container by gas associating exchanging principle

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Embodiment Construction

[0012] The specific implementation of the present invention is further described below in conjunction with the method for vacuuming the glass fiber reinforced plastics non-magnetic Dewar interlayer space in the accompanying drawings:

[0013] As shown in Figure 1:

[0014] The equipment used in the method of vacuuming the FRP non-magnetic Dewar interlayer space includes mechanical pump 1, oil diffusion pump 2, A valve 3, B valve 4, C valve 5, A thermocouple gauge 6, ionization gauge 7, D Valve 8, air extraction nozzle 9, nitrogen cylinder 12, fine-tuning valve 13, B thermocouple regulation tube 14. Vacuuming involves the following steps:

[0015] 1. Put activated carbon adsorbent in the interlayer space 10;

[0016] 2. Heat the FRP non-magnetic Dewar 11 to 100°C with a heating belt, and keep the temperature;

[0017] 3. Turn on the mechanical pump 1, open the C valve 5, open the D valve 8, open the suction nozzle 9 to evacuate the interlayer space 10 of the non-magnetic Dew...

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Abstract

A vacuum method utilizes gas synergetic switching theory. Some adsorbent is put into a vacuuming case then heat it and keep the temperature at 80-150 deg.c, and vacuum the case to 3.0Pa-1.0Pa. Then input a switching gas into the case till the case pressure reaching 1.01325X10 to the power 5 pa. After a while, vacuum the case again to 3.0Pa-1.0Pa, then input the gas again. Repeat the course for 3-5 times till the case be vacuumed to 0.03Pa-0.01Pa. Stop heating and vacuuming. This method can shorten the time of vacuuming the keep the vacurity for a long time.

Description

technical field [0001] The invention relates to a method for evacuating a container, in particular to a method for evacuating a container by using the principle of gas cooperative exchange, and belongs to the field of vacuum technology. Background technique [0002] At present, the vacuum pump is used to evacuate the container directly. Due to the difficult-to-extract adsorption gas on the wall of the container, it will be slowly released into the vacuum space of the container, destroying the vacuum degree of the container. In the prior art, the container vacuuming method announced in the "Vacuum Design Manual" (1991 edition) edited by Dao'an. When using this method to evacuate, due to the degassing of the container wall, especially the existence of some gases with a long degassing time, the vacuuming time of the container is very long, and the vacuum degree of the container cannot be maintained for a long time. Contents of the invention [0003] In order to overcome the ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): F04B37/02F17C3/08
Inventor 肖尤明金听祥徐烈
Owner SHANGHAI JIAOTONG UNIV