CN202707433U - Vacuum air removing system - Google Patents
Vacuum air removing system Download PDFInfo
- Publication number
- CN202707433U CN202707433U CN 201220386808 CN201220386808U CN202707433U CN 202707433 U CN202707433 U CN 202707433U CN 201220386808 CN201220386808 CN 201220386808 CN 201220386808 U CN201220386808 U CN 201220386808U CN 202707433 U CN202707433 U CN 202707433U
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- vacuum
- pump
- main pipe
- pipeline
- degassing system
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Abstract
The utility model discloses a vacuum air removing system which comprises an oil diffusion pump, a vacuum-pumping unit, a vacuum holding pump, a first vacuum baffle valve, a second vacuum baffle valve and a vacuum main pipeline, wherein the upper end of the oil diffusion pump is connected with the vacuum main pipeline through the second vacuum baffle valve, the vacuum holding pump is connected with the oil diffusion pump through a pipeline, and the vacuum-pumping unit is connected with the vacuum main pipeline through the first vacuum baffle valve. After the vacuum air removing system is used, an interlayer of a low-temperature heat-insulation bottle after air removing can achieve 5*10 <-4> pascals which is two orders greatly higher than 5.0*10<-2> pascals of the like-product performance index, and safety performance of the low-temperature heat-insulation bottle is greatly improved. A liquid nitrogen pipeline of the vacuum main pipeline can enable pipeline waste air to be frozen and adsorbed during a vacuum-pumping process, and therefore the vacuum degree is improved. Mirror polish is conducted for the inner wall of the vacuum main pipeline to achieve less than 0.2 Ra, performance of air adsorbing of the inner wall of the pipeline is reduced, and therefore air pumping speed is improved.
Description
Technical field
The utility model relates to a kind of vacuum pumping technology, relates in particular to a kind of vacuum degassing system.
Background technique
Oil is a kind of resource that can't regenerate in a short time, and at the society of worsening shortages, development new energy fuel has become a new focus.
Along with the increasingly stringent of Abgasgesetz and the day by day increase of energy demand, rock gas is because reserves are abundant, and the characteristics such as low emission become the ideal chose of each large automobile vendor exploitation alternative fuel vehicle.Adopting Cryo Heat Insulation bottle storage conveying liquified natural gas is important measures of present automotive industry, and the high vacuum interlayer of Cryo Heat Insulation bottle needs the wrapped multiple thermoinsulation material, the degree of vacuum of interlayer reduces the safety of leaking heat and Cryo Heat Insulation bottle to insulating sandwich very important impact, therefore needs better vacuum pumping device to guarantee the degree of vacuum of dewar bottle interlayer.
The model utility content
The utility model purpose is to provide a kind of novel evacuated off gas system, can vacuumize the interlayer in the Cryo Heat Insulation bottle better.
The technical solution of the utility model is: a kind of vacuum degassing system, comprise oil diffusion pump, vacuumize unit, vacuum holding pump, vacuum flapper valve one, vacuum flapper valve two and vacuum main pipe, the upper end of oil diffusion pump is connected with the vacuum main pipe by vacuum flapper valve two, the vacuum holding pump is connected by pipeline with oil diffusion pump, vacuumizes unit and is connected with the vacuum main pipe by vacuum flapper valve one.
Described vacuum holding pump is oily blade holding vacuum pump.
Described vacuum degassing system also comprises drying room, and the vacuum main pipe is fixed on the drying room platform.
Described vacuum main pipe adopts U-shaped clip to be fixed on the drying room platform.
Described vacuum degassing system also comprises nitrogen heater, and nitrogen heater is connected with the vacuum main pipe by pipeline.
Described vacuum degassing system also comprises the liquid nitrogen pipeline, and the liquid nitrogen pipeline is arranged in the vacuum main pipe, and the import and export of liquid nitrogen pipeline are arranged on the vacuum main pipe.
The described unit that vacuumizes comprises rotary-vane vaccum pump and Roots pump, and rotary-vane vaccum pump connects Roots pump, and Roots pump connects the vacuum main pipe by vacuum flapper valve one.
Described vacuum main pipe inner wall surface polishing degree is below the 0.2Ra.
Vacuum degassing system of the present utility model, treatable gas medium is: air, water vapour, hydrogen, carbon monoxide, carbon dioxide etc., the layer vacuum of the Cryo Heat Insulation bottle after the native system degasification can reach 5 * 10
-4Pa exceeds like product performance index 5.0 * 10 far away
-2Two orders of magnitude of Pa have improved the Safety performance of Cryo Heat Insulation bottle greatly.
Design and produce the liquid nitrogen pipeline in the vacuum main pipe and thereby the freezing absorption degree of vacuum of pipeline residual gas is improved one more than the order of magnitude filling liquid nitrogen in the middle of the vacuum.
Vacuum main pipe inwall is carried out below the bright finishing 0.2Ra, and gas makes the ability of its inner-walls of duct adsorbed gas reduce under molecular flow condition, thereby improves the speed of exhaust, improves pumping efficiency.
Description of drawings
Fig. 1 is the structural representation of vacuum degassing system of the present utility model.
Embodiment
Below in conjunction with accompanying drawing refined copper liquid cooling system of the present utility model is elaborated.
As shown in Figure 1, a kind of vacuum degassing system, comprise oil diffusion pump 1, vacuumize unit, vacuum holding pump 2, vacuum flapper valve 1, vacuum flapper valve 24 and vacuum main pipe 5, the upper end of oil diffusion pump 1 is connected with vacuum main pipe 5 by vacuum flapper valve 24, vacuum holding pump 2 and oil diffusion pump 1 are connected by pipeline, vacuumize unit and are connected with vacuum main pipe 5 by vacuum flapper valve 1.Vacuum holding pump 2 is oily blade holding vacuum pumps.Vacuumize unit and comprise rotary-vane vaccum pump 6 and Roots pump 7, rotary-vane vaccum pump 6 connects Roots pump 7, and Roots pump 7 connects vacuum main pipe 5 by vacuum flapper valve 1.Oil diffusion pump 1 has a heater for diffusion pump, the low side that this heater is arranged on oil diffusion pump 1 is used for heating diffusion pump oil, and pump oil spreads the gas molecule formation vacuum that jet band is walked oil diffusion pump 1 upper end pumping hole after reaching uniform temperature in oil diffusion pump 1 cavity.Oil diffusion pump 1 below is provided with handpiece Water Chilling Units 8, and handpiece Water Chilling Units 8 is used for oil diffusion pump 1 special-purpose cold water circulation temperature lowering.Between vacuum main pipe 5 and Cryo Heat Insulation bottle manual vacuum flapper valve 16 is set, manual vacuum flapper valve 16 is connected on the vacuum main pipe 5 with vacuum Quick-jointing flange cutting ferrule.The relief opening top of oil diffusion pump 1 arranges vacuum flapper valve 3 13.Vacuum flapper valve 1, vacuum flapper valve 24 and vacuum flapper valve 3 13 all are pneumatic vacuum flapper valve.
Vacuum degassing system also comprises nitrogen heater 9, and nitrogen heater 9 is connected with vacuum main pipe 5 by pipeline.Nitrogen heater 9 is filled with hot nitrogen in the vacuum main pipe 5, and the air in the displacement vacuum main pipe 5 makes the easier acquisition of high vacuum.
Vacuum degassing system also comprises liquid nitrogen pipeline 10, and liquid nitrogen pipeline 10 is arranged in the vacuum main pipe 5, and the import and export of liquid nitrogen pipeline 10 are arranged on the vacuum main pipe 5.Cold-trap 14 is connected with liquid nitrogen pipeline 10, and cold well 17 injects liquid nitrogen to liquid nitrogen pipeline 10.
Vacuum degassing system also comprises drying room 11, and vacuum main pipe 5 is fixed on drying room 11 platforms by U-shaped clip.
Vacuum degassing system is controlled the start and stop of each pump by the opening and closing of an electric control cubicle 12 control vacuum flapper valve 1, vacuum flapper valve 24 and vacuum flapper valves 3 13, the start and stop of control handpiece Water Chilling Units 8 and the unlatching of nitrogen heater 9.
Electric control cubicle 12, handpiece Water Chilling Units 8 and nitrogen heater 9 usefulness are bolted to base 14.
At vacuum main pipe 5 pressure transducer 15 is arranged.
The flange part that all pipelines connect is " O " type thermostable fluorine rubber seal.
Working principle of the present utility model is as follows:
1, the gas cylinder to be degassed with 40～60 125L is connected on the vacuum main pipe 5 by vacuum pumping tool equipment, opens manual vacuum flapper valve 12.
2, open 40～60 GZ-01 vacuum pumping tool equipments, open vacuum flapper valve 24 and close vacuum flapper valve 1 and vacuum flapper valve 3 13.
3, start vacuum holding pump 2, when oil diffusion pump 1 pump chamber degree of vacuum reaches 5Pa, open heater of oil diffusion pump and preheat.And startup handpiece Water Chilling Units 8.
4, start and to vacuumize unit and carry out forvacuum, start first rotary-vane vaccum pump 6 and vacuumize, after degree of vacuum reaches 500Pa, start Roots pump 7.
5, when the system vacuum degree reaches 5Pa, start helium mass spectrometer leak detector and enter smart inspection pattern, to 40～60 bottles vacuum pumping tool equipment, and helium leak test is sprayed in the valve joint.Leak rate requires: 5 * 10
-9Pa m
3/ s.
6, determine without opening heating equipment after leaking gas cylinder to be heated, heating-up temperature is not less than 100 degrees centigrade, is not higher than 120 degrees centigrade.In the heating process, vacuum system is filled hot nitrogen, temperature is controlled at about 80 degrees centigrade, and intrasystem degree of vacuum is charged near a barometric pressure.Then laser heating is 12 hours.
7, start and to vacuumize unit and vacuumize.When the system vacuum degree arrives 5Pa, close vacuum flapper valve 24, open vacuum flapper valve 1 and vacuum flapper valve 3 13 and start oil diffusion pumps 1 and carry out high vacuum exhaustion.Continuous exhaust pneumatic wallop 5～6 hours.
8, use about 80～100 degrees centigrade drying nitrogen to carry out nitrogen replacement 3～6 times.
9, carry out 20 hours by a definite date final exhaust process take oil diffusion pump 1 as main pump, can be to cold-trap 14 filling liquid nitrogen in this process.
10, close drying room 11 heaters and be cooled to 40～60 vacuum pumping tool equipments that ambient temperature is closed gas cylinder and system joint.
11, the complete rear operator of cooling carry out last sealed-off.
Claims (8)
1. vacuum degassing system, it is characterized in that, comprise oil diffusion pump, vacuumize unit, vacuum holding pump, vacuum flapper valve one, vacuum flapper valve two and vacuum main pipe, the upper end of oil diffusion pump is connected with the vacuum main pipe by vacuum flapper valve two, the vacuum holding pump is connected by pipeline with oil diffusion pump, vacuumizes unit and is connected with the vacuum main pipe by vacuum flapper valve one.
2. vacuum degassing system according to claim 1 is characterized in that, described vacuum holding pump is oily blade holding vacuum pump.
3. vacuum degassing system according to claim 1 is characterized in that, described vacuum degassing system also comprises nitrogen heater, and nitrogen heater is connected with the vacuum main pipe by pipeline.
4. vacuum degassing system according to claim 1 is characterized in that, described vacuum degassing system also comprises the liquid nitrogen pipeline, and the liquid nitrogen pipeline is arranged in the vacuum main pipe, and the import and export of liquid nitrogen pipeline are arranged on the vacuum main pipe.
5. vacuum degassing system according to claim 1 is characterized in that, the described unit that vacuumizes comprises rotary-vane vaccum pump and Roots pump, and rotary-vane vaccum pump connects Roots pump, and Roots pump connects the vacuum main pipe by vacuum flapper valve one.
6. vacuum degassing system according to claim 1 is characterized in that, described vacuum degassing system also comprises drying room, and the vacuum main pipe is fixed on the drying room platform.
7. vacuum degassing system according to claim 6 is characterized in that, described vacuum main pipe adopts U-shaped card sieve to be fixed on the drying room platform.
8. vacuum degassing system according to claim 1 is characterized in that, described vacuum main pipe inner wall surface polishing degree is below the 0.2Ra.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201220386808 CN202707433U (en) | 2012-08-07 | 2012-08-07 | Vacuum air removing system |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201220386808 CN202707433U (en) | 2012-08-07 | 2012-08-07 | Vacuum air removing system |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN202707433U true CN202707433U (en) | 2013-01-30 |
Family
ID=47587741
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 201220386808 Expired - Fee Related CN202707433U (en) | 2012-08-07 | 2012-08-07 | Vacuum air removing system |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN202707433U (en) |
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105736934A (en) * | 2016-03-29 | 2016-07-06 | 南通龙鹰真空科技有限公司 | Vacuum pumping system for low-temperature storage tank interlayer |
| CN108591028A (en) * | 2018-03-30 | 2018-09-28 | 嘉兴市华鼎日用品有限公司 | A kind of evacuator |
| CN108758325A (en) * | 2018-04-16 | 2018-11-06 | 成都科瑞尔低温设备有限公司 | One kind vacuumizing degassing process |
| CN109488563A (en) * | 2018-12-21 | 2019-03-19 | 江苏深绿新能源科技有限公司 | A kind of cold pump installation of high vacuum and method |
| CN111810833A (en) * | 2020-08-05 | 2020-10-23 | 杭州富士达特种材料股份有限公司 | Double-pass vacuum pumping system and method for vacuum multi-layer heat-insulation low-temperature container interlayer |
-
2012
- 2012-08-07 CN CN 201220386808 patent/CN202707433U/en not_active Expired - Fee Related
Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105736934A (en) * | 2016-03-29 | 2016-07-06 | 南通龙鹰真空科技有限公司 | Vacuum pumping system for low-temperature storage tank interlayer |
| CN108591028A (en) * | 2018-03-30 | 2018-09-28 | 嘉兴市华鼎日用品有限公司 | A kind of evacuator |
| CN108758325A (en) * | 2018-04-16 | 2018-11-06 | 成都科瑞尔低温设备有限公司 | One kind vacuumizing degassing process |
| CN109488563A (en) * | 2018-12-21 | 2019-03-19 | 江苏深绿新能源科技有限公司 | A kind of cold pump installation of high vacuum and method |
| CN109488563B (en) * | 2018-12-21 | 2024-04-02 | 江苏深绿新能源科技有限公司 | High-vacuum air-cooling pump device and method |
| CN111810833A (en) * | 2020-08-05 | 2020-10-23 | 杭州富士达特种材料股份有限公司 | Double-pass vacuum pumping system and method for vacuum multi-layer heat-insulation low-temperature container interlayer |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CF01 | Termination of patent right due to non-payment of annual fee | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20130130 Termination date: 20200807 |