CN105422454A - Vacuum pumping system and vacuum pumping method - Google Patents

Vacuum pumping system and vacuum pumping method Download PDF

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Publication number
CN105422454A
CN105422454A CN201510903613.0A CN201510903613A CN105422454A CN 105422454 A CN105422454 A CN 105422454A CN 201510903613 A CN201510903613 A CN 201510903613A CN 105422454 A CN105422454 A CN 105422454A
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CN
China
Prior art keywords
vacuum
pump
valve
roots pump
vacuum pumping
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Granted
Application number
CN201510903613.0A
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Chinese (zh)
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CN105422454B (en
Inventor
章新东
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
RUI STEEL INDUSTRY Co Ltd OF PANZHIHUA GANGCHENG GROUP
Original Assignee
RUI STEEL INDUSTRY Co Ltd OF PANZHIHUA GANGCHENG GROUP
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Priority to CN201510903613.0A priority Critical patent/CN105422454B/en
Publication of CN105422454A publication Critical patent/CN105422454A/en
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Classifications

    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
    • F04C—ROTARY-PISTON, OR OSCILLATING-PISTON, POSITIVE-DISPLACEMENT MACHINES FOR LIQUIDS; ROTARY-PISTON, OR OSCILLATING-PISTON, POSITIVE-DISPLACEMENT PUMPS
    • F04C25/00—Adaptations of pumps for special use of pumps for elastic fluids
    • F04C25/02—Adaptations of pumps for special use of pumps for elastic fluids for producing high vacuum
    • C—CHEMISTRY; METALLURGY
    • C21—METALLURGY OF IRON
    • C21C—PROCESSING OF PIG-IRON, e.g. REFINING, MANUFACTURE OF WROUGHT-IRON OR STEEL; TREATMENT IN MOLTEN STATE OF FERROUS ALLOYS
    • C21C7/00—Treating molten ferrous alloys, e.g. steel, not covered by groups C21C1/00 - C21C5/00
    • C21C7/10—Handling in a vacuum
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
    • F04C—ROTARY-PISTON, OR OSCILLATING-PISTON, POSITIVE-DISPLACEMENT MACHINES FOR LIQUIDS; ROTARY-PISTON, OR OSCILLATING-PISTON, POSITIVE-DISPLACEMENT PUMPS
    • F04C23/00—Combinations of two or more pumps, each being of rotary-piston or oscillating-piston type, specially adapted for elastic fluids; Pumping installations specially adapted for elastic fluids; Multi-stage pumps specially adapted for elastic fluids
    • F04C23/005—Combinations of two or more pumps, each being of rotary-piston or oscillating-piston type, specially adapted for elastic fluids; Pumping installations specially adapted for elastic fluids; Multi-stage pumps specially adapted for elastic fluids of dissimilar working principle
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
    • F04C—ROTARY-PISTON, OR OSCILLATING-PISTON, POSITIVE-DISPLACEMENT MACHINES FOR LIQUIDS; ROTARY-PISTON, OR OSCILLATING-PISTON, POSITIVE-DISPLACEMENT PUMPS
    • F04C28/00—Control of, monitoring of, or safety arrangements for, pumps or pumping installations specially adapted for elastic fluids
    • F04C28/02—Control of, monitoring of, or safety arrangements for, pumps or pumping installations specially adapted for elastic fluids specially adapted for several pumps connected in series or in parallel
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
    • F04C—ROTARY-PISTON, OR OSCILLATING-PISTON, POSITIVE-DISPLACEMENT MACHINES FOR LIQUIDS; ROTARY-PISTON, OR OSCILLATING-PISTON, POSITIVE-DISPLACEMENT PUMPS
    • F04C28/00—Control of, monitoring of, or safety arrangements for, pumps or pumping installations specially adapted for elastic fluids
    • F04C28/24—Control of, monitoring of, or safety arrangements for, pumps or pumping installations specially adapted for elastic fluids characterised by using valves controlling pressure or flow rate, e.g. discharge valves or unloading valves

Abstract

The invention discloses a vacuum pumping system and a vacuum pumping method and particularly relates to a vacuum pumping system and a vacuum pumping method which are used for external refining equipment in the vacuumizing field. By means of the vacuum pumping system, air can be effectively prevented from entering an pumping pipeline, so that a roots pump is prevented from being impacted. The vacuum pumping system comprises a main valve, the roots pump, a vacuum tank, a gas cooler, a bag-type dust remover and the pumping pipeline. The vacuum tank, the roots pump, the bag-type dust remover, a vacuum valve and the gas cooler are sequentially connected to the pumping pipeline. The vacuum pumping system further comprises a screw pump. The invention further provides the vacuum pumping method. By means of the vacuum pumping method, the air can be effectively prevented from entering the pumping pipeline, so that the roots pump is prevented from being impacted. The vacuum pumping method comprises the following steps that A, a pre-pumping valve is opened, and the screw pump is started; B, the roots pump is started; and C, when the frequency of the roots pump is smaller than 5 HZ, the vacuum valve is opened. The vacuum pumping system is provided with the screw pump and the pre-pumping valve thereby being prevented from being impacted by air pressure.

Description

Vacuum pumping system and vacuum suction method
Technical field
The present invention relates to a kind of vacuum pumping system and vacuum suction method, especially a kind of vacuum pumping system and vacuum suction method vacuumizing field for external refining equipment.
Background technique
Vacuum refining dry vacuum extract system is that the special device vacuumized is equipped in external refining, vacuum valve is wherein the valve connecting vacuum tank and pump-line, enter in vacuum process in prior art, when opening vacuum valve, air in vacuum tank can enter pump-line and have larger compression shock to Roots pump, during owing to opening vacuum valve, Roots pump is still in high frequency operation, and there is larger infringement in institute to Roots pump in this way.Therefore a kind of air of can effectively avoiding also is not had to enter pump-line to the vacuum pumping system of the impact that Roots pump causes and vacuum suction method in prior art.
Summary of the invention
Technical problem to be solved by this invention is to provide a kind of air of can effectively avoiding and enters the vacuum pumping system of pump-line to the impact that Roots pump causes.
For solving the problems of the technologies described above the vacuum pumping system that the present invention adopts, comprise main valve, Roots pump, vacuum tank, gas cooler, sack cleaner and pump-line, described vacuum tank, Roots pump, sack cleaner, vacuum valve, gas cooler, be connected in turn on pump-line, also comprise screw pump, described screw pump is connected on pump-line, described screw pump is positioned at Roots pump one end towards vacuum tank, also comprise and take out valve in advance, described valve of taking out in advance is connected on pump-line, and described valve of taking out in advance is positioned between sack cleaner and Roots pump.
The present invention also provides a kind of air of can effectively avoiding to enter the vacuum suction method of pump-line to the impact that Roots pump causes.
The vacuum suction method adopted for solving the problems of the technologies described above the present invention comprises following step:
A, closedown vacuum valve, open and take out valve valve in advance, start screw pump, vacuumize process to vacuum tank;
B, when vacuum tank internal pressure is at below 30MPa, starts Roots pump and make Pressure Drop in vacuum tank to below 3MPa;
C, when Roots pump frequency is at 5H ztime following, open vacuum valve.
The invention has the beneficial effects as follows: the application is provided with screw pump and takes out valve in advance, wherein take out valve valve in advance and select valve of the prior art.Before unlatching Roots pump vacuumizes vacuum; first start screw pump; open and take out valve valve in advance and carried out preliminary vacuumizing process to it before vacuum tank is communicated with Roots pump; intrasystem pressure is progressively reduced; Roots pump is restarted when pressure is reduced to ideal value; make Roots pump start to run under lower frequency of okperation, protect it not impact by air pressure.
Accompanying drawing explanation
Fig. 1 is the flow chart of the application.
Embodiment
Below in conjunction with accompanying drawing, the invention will be further described.
Vacuum pumping system of the present invention, comprise main valve, Roots pump, vacuum tank, gas cooler, sack cleaner and pump-line, described vacuum tank, Roots pump, sack cleaner, vacuum valve, gas cooler, be connected in turn on pump-line, also comprise screw pump, described screw pump is connected on pump-line, described screw pump is positioned at Roots pump one end towards vacuum tank, also comprise and take out valve in advance, described valve of taking out in advance is connected on pump-line, and described valve of taking out in advance is positioned between sack cleaner and Roots pump.Prior art just starts Roots pump and starts to vacuumize vacuum tank in vacuum suction initial procedure, but do like this and the air in vacuum tank can be made to enter pump-line and cause larger compression shock to Roots pump, the Roots pump just in high-frequency work is caused damage.And the vacuum pumping system of the application, be provided with screw pump and take out valve in advance, wherein take out valve valve in advance and select valve of the prior art.Before unlatching Roots pump vacuumizes vacuum; first start screw pump; open and take out valve valve in advance and carried out preliminary vacuumizing process to it before vacuum tank is communicated with Roots pump; intrasystem pressure is progressively reduced; Roots pump is restarted when pressure is reduced to ideal value; make Roots pump start to run under lower frequency of okperation, protect it not impact by air pressure.
As shown in Figure 1, vacuum suction method of the present invention comprises following step:
A, closedown vacuum valve, open and take out valve valve in advance, start screw pump, vacuumize process to vacuum tank;
B, when vacuum tank internal pressure is at below 30MPa, starts Roots pump and make Pressure Drop in vacuum tank to below 3MPa;
C, when Roots pump frequency is at 5H ztime following, open vacuum valve.
The present invention is before unlatching Roots pump vacuumizes vacuum; first start screw pump; open and take out valve valve in advance; carried out preliminary vacuumizing process to it before vacuum tank is communicated with Roots pump, when making intrasystem pressure progressively be reduced to below 30MPa, now restart Roots pump; Roots pump has been under lower pressure; the impact of air pressure can not be subject to, and make Roots pump start to run under lower frequency of okperation, protect it not impact by air pressure.When Roots pump frequency is at 5H ztime following, then air and vacuum valve, just can carry out normal vacuum suction effect after Roots pump pressure is grown steadily.

Claims (2)

1. vacuum pumping system, comprise main valve, Roots pump, vacuum tank, gas cooler, sack cleaner and pump-line, described vacuum tank, Roots pump, sack cleaner, vacuum valve, gas cooler, be connected in turn on pump-line, it is characterized in that: also comprise screw pump, described screw pump is connected on pump-line, described screw pump is positioned at Roots pump one end towards vacuum tank, also comprise and take out valve in advance, described valve of taking out in advance is connected on pump-line, and described valve of taking out in advance is positioned between sack cleaner and Roots pump.
2. adopt the vacuum suction method of vacuum pumping system as claimed in claim 1, it is characterized in that: comprise following step:
A, closedown vacuum valve, open and take out valve valve in advance, start screw pump, vacuumize process to vacuum tank;
B, when vacuum tank internal pressure is at below 30MPa, starts Roots pump and make Pressure Drop in vacuum tank to below 3MPa;
C, when Roots pump frequency is at 5H ztime following, open vacuum valve.
CN201510903613.0A 2015-12-09 2015-12-09 Vacuum-pumping system and vacuum suction method Active CN105422454B (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
CN201510903613.0A CN105422454B (en) 2015-12-09 2015-12-09 Vacuum-pumping system and vacuum suction method

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
CN201510903613.0A CN105422454B (en) 2015-12-09 2015-12-09 Vacuum-pumping system and vacuum suction method

Publications (2)

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CN105422454A true CN105422454A (en) 2016-03-23
CN105422454B CN105422454B (en) 2017-12-19

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Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN106762537A (en) * 2017-02-08 2017-05-31 中国科学院沈阳科学仪器股份有限公司 Pumped vacuum systems and method
CN109136471A (en) * 2018-08-13 2019-01-04 林州凤宝管业有限公司 A kind of VD vacuum takes out method in advance
CN110094967A (en) * 2019-05-07 2019-08-06 株洲瑞德尔冶金设备制造有限公司 A kind of vacuum drying oven using dry type screw pump
CN113374693A (en) * 2021-07-03 2021-09-10 浙江珂勒曦动力设备股份有限公司 Roots screw pump unit control method, system, terminal and storage medium

Citations (12)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US20010051101A1 (en) * 2000-02-24 2001-12-13 Schofield Nigel Paul Vacuum pumps
CN2725567Y (en) * 2004-09-07 2005-09-14 沈阳三之环真空设备有限公司 High vacuum machine set
CN201193610Y (en) * 2008-04-29 2009-02-11 无锡市四方真空设备有限公司 Closed circulation roots pump and water-ring pump vacuum unit
CN202492540U (en) * 2012-02-23 2012-10-17 西安重鑫电炉设备有限公司 Energy saving vacuum degassing (VD)/vacuum oxygen degassing (VOD) vacuum refining furnace based on full automatic mechanical pump group
CN102943151A (en) * 2012-10-24 2013-02-27 杭州杭真真空工程技术有限公司 Steel liquid vacuum refinement system adopting complete-dry type mechanical vacuum pump
CN203035557U (en) * 2013-01-09 2013-07-03 寿光市鲁源盐化有限公司 Dry type vacuum system
CN203174148U (en) * 2013-04-11 2013-09-04 什邡市三裕锻件有限公司 Vacuum refining system for molten steel
CN104246230A (en) * 2012-05-02 2014-12-24 爱德华兹有限公司 Method and apparatus for warming up a vacuum pump arrangement
CN204185513U (en) * 2014-10-11 2015-03-04 中冶南方工程技术有限公司 RH refining furnace vacuum-pumping system
CN104822943A (en) * 2012-11-09 2015-08-05 厄利孔莱博尔德真空技术有限责任公司 Vacuum pump system for evacuating chamber, and method for controlling vacuum pump system
CN104846151A (en) * 2015-06-01 2015-08-19 重庆钢铁集团设计院有限公司 Vacuum tank vacuumizing method and liquid steel vacuum refining method thereof
CN104870815A (en) * 2012-12-22 2015-08-26 厄利孔莱博尔德真空技术有限责任公司 Pumping unit for pumping light gases, and use of the pumping unit

Patent Citations (12)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US20010051101A1 (en) * 2000-02-24 2001-12-13 Schofield Nigel Paul Vacuum pumps
CN2725567Y (en) * 2004-09-07 2005-09-14 沈阳三之环真空设备有限公司 High vacuum machine set
CN201193610Y (en) * 2008-04-29 2009-02-11 无锡市四方真空设备有限公司 Closed circulation roots pump and water-ring pump vacuum unit
CN202492540U (en) * 2012-02-23 2012-10-17 西安重鑫电炉设备有限公司 Energy saving vacuum degassing (VD)/vacuum oxygen degassing (VOD) vacuum refining furnace based on full automatic mechanical pump group
CN104246230A (en) * 2012-05-02 2014-12-24 爱德华兹有限公司 Method and apparatus for warming up a vacuum pump arrangement
CN102943151A (en) * 2012-10-24 2013-02-27 杭州杭真真空工程技术有限公司 Steel liquid vacuum refinement system adopting complete-dry type mechanical vacuum pump
CN104822943A (en) * 2012-11-09 2015-08-05 厄利孔莱博尔德真空技术有限责任公司 Vacuum pump system for evacuating chamber, and method for controlling vacuum pump system
CN104870815A (en) * 2012-12-22 2015-08-26 厄利孔莱博尔德真空技术有限责任公司 Pumping unit for pumping light gases, and use of the pumping unit
CN203035557U (en) * 2013-01-09 2013-07-03 寿光市鲁源盐化有限公司 Dry type vacuum system
CN203174148U (en) * 2013-04-11 2013-09-04 什邡市三裕锻件有限公司 Vacuum refining system for molten steel
CN204185513U (en) * 2014-10-11 2015-03-04 中冶南方工程技术有限公司 RH refining furnace vacuum-pumping system
CN104846151A (en) * 2015-06-01 2015-08-19 重庆钢铁集团设计院有限公司 Vacuum tank vacuumizing method and liquid steel vacuum refining method thereof

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN106762537A (en) * 2017-02-08 2017-05-31 中国科学院沈阳科学仪器股份有限公司 Pumped vacuum systems and method
CN109136471A (en) * 2018-08-13 2019-01-04 林州凤宝管业有限公司 A kind of VD vacuum takes out method in advance
CN110094967A (en) * 2019-05-07 2019-08-06 株洲瑞德尔冶金设备制造有限公司 A kind of vacuum drying oven using dry type screw pump
CN113374693A (en) * 2021-07-03 2021-09-10 浙江珂勒曦动力设备股份有限公司 Roots screw pump unit control method, system, terminal and storage medium

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