CN204627988U - The series connection Roots vacuum system that can simultaneously start - Google Patents
The series connection Roots vacuum system that can simultaneously start Download PDFInfo
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- CN204627988U CN204627988U CN201420860374.6U CN201420860374U CN204627988U CN 204627988 U CN204627988 U CN 204627988U CN 201420860374 U CN201420860374 U CN 201420860374U CN 204627988 U CN204627988 U CN 204627988U
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Abstract
The utility model relates to a kind of series connection Roots vacuum system that can simultaneously start.It solve the Starting mode of Roots vacuum system of the prior art longer, efficiency is low, energy loss is large deficiency consuming time, it mainly comprises by the motor-driven preevacuation pump of Roots pump and Roots pump, described preevacuation pump arranges relief opening, described Roots pump arranges intakeport; Between preevacuation pump and Roots pump, pneumatic ball valve is set; The motor of described preevacuation pump, pneumatic ball valve and pressure test device control by control cabinet.The beneficial effects of the utility model are: under the prerequisite ensureing Roots vacuum pump motor nonoverload, improve pumping speed by the porting pressure reduction controlling Roots pump, and then shorten the starting time of vacuum pump set.
Description
Technical field
The utility model relates to a kind of Roots vacuum system, particularly relates to a kind of series connection Roots vacuum system that can simultaneously start.
Background technique
The vacuum environment of the process requirements such as the drying of the vacuum distillation of current a lot of chemical industry and pharmaceutical industry, dehydration, concentrated and food service industry is between 5000Pa to 3000Pa, now single-stage water ring vaccum pump cannot meet the demands, and need Roots vacuum system as pumping equipment.Wherein roots pump systems with water ring is particularly suitable for the process conditions that need to extract a large amount of water vapour out.
(fore pump can select Nash hytor, rotary-vane vaccum pump, sliding valve vacuum pump or dry screw vacuum pump to common Roots vacuum system, include but not limited to above-mentioned several preevacuation pump) power-up sequence be first open fore pump when the degree of vacuum of vacuum chamber is evacuated to about 15000Pa, then open Roots pump to obtain the degree of vacuum of manufacturing technique requirent.This Starting mode is consuming time longer, wastes energy, and if in production process the fluctuation of vacuum chamber pressure value Roots pump can be caused to shut down, restart and namely repeat initial start-up procedures.The pressure difference value of Roots pump porting is sent to vacuum pump set control section by by pressure difference transmitter by the utility model, thus ensureing to regulate and control its working state under the prerequisite that water ring vaccum pump and Roots pump normally run, to realize the degree of vacuum obtaining manufacturing technique requirent fast, and reduce the impact of pressure surge on quality of product of vacuum chamber in production process.
Roots pump is opened when degree of vacuum is lower, its Exhaust Gas cannot be discharged in time by fore pump, easily cause the difference of exhaust pressure and suction pressure to be greater than the tolerance limit pressure reduction of Roots pump, this can cause Roots vacuum pump motor current higher than its rated current, burns out motor.Thus adopt at present after utilizing fore pump that the degree of vacuum of vacuum chamber is evacuated to degree of vacuum needed for the startup of Roots pump and restart Roots pump, but this mode is consuming time longer, waste energy and affect efficiency, the effect of Roots pump in vacuum acquirement process can not be given full play to.Also there is minority artificer between Roots pump and preevacuation pump, add a knock out drum, the impact of unit starting final vacuum room pressure fluctuation on Roots pump working state can be reduced like this, but effect is very not remarkable, and after adding knock out drum, the start-up course of unit can be slower.
Model utility content
The utility model, for the Starting mode of Roots vacuum system of the prior art longer, efficiency is low, energy loss is large deficiency consuming time, provides a kind of series connection Roots vacuum system that can simultaneously start.
The technological scheme that the utility model solves the problems of the technologies described above is as follows:
The series connection Roots vacuum system that can simultaneously start, comprises by the motor-driven preevacuation pump of Roots pump and Roots pump, described preevacuation pump arranges relief opening, described Roots pump arranges intakeport; Between preevacuation pump and Roots pump, pneumatic ball valve is set; The motor of described preevacuation pump, pneumatic ball valve and pressure test device control by control cabinet.
On the basis of technique scheme, the utility model can also do following improvement.
Further, described pressure test device is two pressure transmitters; Or described pressure test device comprises pressure difference transmitter and is located at the vacuum gauge at intakeport place.
Further, the rate of air sucked in required of described Roots pump is by the relay contactor be located in control cabinet or Controlled by Programmable Controller.
Further, described preevacuation pump is the one in Nash hytor, rotary-vane vaccum pump, sliding valve vacuum pump, dry screw vacuum pump, but is not limited to above-mentioned several vacuum pump.
Compared with prior art, the beneficial effects of the utility model are: under the prerequisite ensureing Roots vacuum pump motor nonoverload, improve pumping speed by the porting pressure reduction controlling Roots pump, and then shorten the starting time of vacuum pump set; Preevacuation pump and the rational running parameter of Roots pump make pumping efficiency higher, and energy consumption is lower; The automatic control function of control cabinet effectively reduces the range of pressure fluctuations of vacuum chamber, can return to the degree of vacuum of requirement when degree of vacuum reduces suddenly with the shortest time; Excellent structural design, dismounting maintenance is convenient.
Accompanying drawing explanation
Fig. 1 is structural representation of the present utility model.
In the drawings, 1, relief opening; 2, preevacuation pump; 3, pneumatic ball valve; 4, Roots pump; 5, vacuum gauge; 6, intakeport; 7, pressure test device; 8, control cabinet; 9, motor.
Embodiment
Be described principle of the present utility model and feature below in conjunction with accompanying drawing, example, only for explaining the utility model, is not intended to limit scope of the present utility model.
The series connection Roots vacuum system that can simultaneously start, comprises the preevacuation pump 2 and Roots pump 4 that are driven by Roots vacuum pump motor 9, described preevacuation pump 2 arranges relief opening 1, described Roots pump 4 arranges intakeport 6; The vacuum gauge 5 be connected with pressure test device 7 is set at intakeport 6 place; Pneumatic ball valve 3 is set between preevacuation pump 2 and Roots pump 4; The motor 9 of described preevacuation pump 2, pneumatic ball valve 3 and pressure test device 7 control by control cabinet 8.
Described pressure test device 7 is two pressure transmitters, or is made up of pressure difference transmitter and the vacuum gauge 5 being located at intakeport 6 place, preferred pressure difference transmitter; The rate of air sucked in required of described Roots pump 4 by the relay contactor be located in control cabinet 8 or Controlled by Programmable Controller, preferred relay contactor; Described preevacuation pump 2 is the one in Nash hytor, rotary-vane vaccum pump, sliding valve vacuum pump, dry screw vacuum pump, but is not limited to above-mentioned several vacuum pump.
During utility model works, by intakeport 6 with taken out container and be connected, system start button is pressed after the power supply indicator switched on power on cabinet 8 to be controlled lights, after pneumatic ball valve 3 is opened, Roots pump 4 and preevacuation pump 2 are started working simultaneously, pressure difference transmitter detects the pressure difference value of the porting of Roots pump 4, by the relay contactor in signal input control cabinet 8, according to the internal processes selecting the maximum permissible pressure of Roots pump 4 to arrange relay contactor, when the pressure difference of Roots pump 4 porting is greater than the maximum permissible pressure of this pump, system carries out frequency adjustment to preevacuation pump 2 and Roots pump 4 automatically, instantaneously pressure reduction is controlled below maximum permissible pressure.
For the utility model comprising two or more Roots pumps 4, the porting pressure difference of every single Roots pump 4 can be detected respectively, and ensure that it runs well by control system.
Pressure difference transmitter detects the pressure reduction of Roots pump 4 porting, by the Signal transmissions detected to relay contactor and after carrying out a series of data processing via programmable controller, 2 pressure differences are shown by the touch screen of control cabinet 8, set the different frequency of Roots vacuum pump motor 9 under different pressure reduction, related data is the checkout value obtained by great many of experiments, and data are added up by MATLAB software, analyze and optimizes, its basic object is increase its speed of exhaust as far as possible under the prerequisite ensureing Roots vacuum pump motor 9 nonoverload.
The foregoing is only preferred embodiment of the present utility model, not in order to limit the utility model, all within spirit of the present utility model and principle, any amendment done, equivalent replacement, improvement etc., all should be included within protection domain of the present utility model.
Claims (5)
1. the series connection Roots vacuum system that can simultaneously start, comprise the preevacuation pump (2) and Roots pump (4) that are driven by Roots vacuum pump motor (9), described preevacuation pump (2) is arranged relief opening (1), described Roots pump (4) is arranged intakeport (6); It is characterized in that: pneumatic ball valve (3) is set between preevacuation pump (2) and Roots pump (4); The motor (9) of described preevacuation pump (2), pneumatic ball valve (3) and pressure test device (7) control by control cabinet (8).
2. the series connection Roots vacuum system that can simultaneously start according to claim 1, is characterized in that: described pressure test device (7) is two pressure transmitters.
3. the series connection Roots vacuum system that can simultaneously start according to claim 1, is characterized in that: described pressure test device (7) comprises pressure difference transmitter and is located at the vacuum gauge (5) at intakeport (6) place.
4. the series connection Roots vacuum system that can simultaneously start according to claim 1, is characterized in that: the rate of air sucked in required of described Roots pump (4) is by the relay contactor be located in control cabinet (8) or Controlled by Programmable Controller.
5. the series connection Roots vacuum system that can simultaneously start according to claim 1, is characterized in that: described preevacuation pump (2) is Nash hytor, rotary-vane vaccum pump, sliding valve vacuum pump or dry screw vacuum pump.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201420860374.6U CN204627988U (en) | 2014-12-30 | 2014-12-30 | The series connection Roots vacuum system that can simultaneously start |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201420860374.6U CN204627988U (en) | 2014-12-30 | 2014-12-30 | The series connection Roots vacuum system that can simultaneously start |
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| CN204627988U true CN204627988U (en) | 2015-09-09 |
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| CN201420860374.6U Active CN204627988U (en) | 2014-12-30 | 2014-12-30 | The series connection Roots vacuum system that can simultaneously start |
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Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108266347A (en) * | 2018-03-16 | 2018-07-10 | 东莞市基富真空设备有限公司 | A kind of vacuum energy-saving equipment of low noise |
| CN108282112A (en) * | 2018-01-23 | 2018-07-13 | 江苏石川岛丰东真空技术有限公司 | Motor vacuum activation system and motor vacuum start method |
| CN108412740A (en) * | 2018-03-16 | 2018-08-17 | 东莞市基富真空设备有限公司 | A kind of the vacuum supply system and its control method of low energy consumption |
| CN109262778A (en) * | 2018-11-27 | 2019-01-25 | 西北农林科技大学 | The system and device of pest and germ is eliminated in a kind of wood materials vacuum dehumidifying |
| CN109880975A (en) * | 2019-04-01 | 2019-06-14 | 山东钢铁集团日照有限公司 | A kind of big machinery vacuum system is without by-pass governing method |
| CN110093804A (en) * | 2018-01-31 | 2019-08-06 | 上海东冠纸业有限公司 | A kind of vacuum system for paper machine |
-
2014
- 2014-12-30 CN CN201420860374.6U patent/CN204627988U/en active Active
Cited By (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108282112A (en) * | 2018-01-23 | 2018-07-13 | 江苏石川岛丰东真空技术有限公司 | Motor vacuum activation system and motor vacuum start method |
| CN108282112B (en) * | 2018-01-23 | 2024-02-20 | 江苏石川岛丰东真空技术有限公司 | Motor vacuum starting system and motor vacuum starting method |
| CN110093804A (en) * | 2018-01-31 | 2019-08-06 | 上海东冠纸业有限公司 | A kind of vacuum system for paper machine |
| CN108266347A (en) * | 2018-03-16 | 2018-07-10 | 东莞市基富真空设备有限公司 | A kind of vacuum energy-saving equipment of low noise |
| CN108412740A (en) * | 2018-03-16 | 2018-08-17 | 东莞市基富真空设备有限公司 | A kind of the vacuum supply system and its control method of low energy consumption |
| CN109262778A (en) * | 2018-11-27 | 2019-01-25 | 西北农林科技大学 | The system and device of pest and germ is eliminated in a kind of wood materials vacuum dehumidifying |
| CN109880975A (en) * | 2019-04-01 | 2019-06-14 | 山东钢铁集团日照有限公司 | A kind of big machinery vacuum system is without by-pass governing method |
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