CN205559284U - Roots's water ring pump evacuating device - Google Patents
Roots's water ring pump evacuating device Download PDFInfo
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- CN205559284U CN205559284U CN201620295261.5U CN201620295261U CN205559284U CN 205559284 U CN205559284 U CN 205559284U CN 201620295261 U CN201620295261 U CN 201620295261U CN 205559284 U CN205559284 U CN 205559284U
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- pump
- vacuum
- water ring
- ring pump
- valve
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Abstract
The utility model relates to a roots's water ring pump evacuating device, the pipe connection condenser is passed through to the entrance of lobe pump, it sets up by -pass valve A and by -pass valve B to connect in parallel respectively on the lobe pump, by -pass valve B's upper end is equipped with the vent relief valve, the export of lobe pump is passed through the pipeline and is linked to each other with the cooler, set up by -pass valve C on the pipeline between lobe pump and the cooler, by -pass valve C's upper end sets up discharge valve, it is continuous with the entry of water ring pump that the cooler passes through the pipeline, the water ring pump passes through the middle part of pipe connection to separator. The utility model has the advantages of designed vent relief valve and discharge valve in the aspect of the vacuum to establishhing, continuous operation in can be from the ordinary pressure to the various vacuum ranges of establishhing specified vacuum value possesses the vacuous ability of establishhing. Increased the lobe pump, vacuum pump suction ultimate vacuum value single than before is high, has improved the vacuum, makes vacuum system can reach the most economic operating condition, improved water ring pump service condition, made the security of equipment obtain the improvement.
Description
Technical field
This utility model relates to vaccum-pumping equipment technical field, particularly relates to a kind of Roots's water ring pump vacuum extractor.
Background technology
Present vaccum-pumping equipment is when setting up vacuum, and suction flow is very big, can set up specified vacuum values from normal pressure, but when equipment is properly functioning, namely power is bigger than normal when maintaining operation in terms of vacuum, causes energy dissipation within the time of regulation.Single vacuum pump is with the obvious advantage when setting up vacuum, however it is necessary that the time period setting up vacuum is short.Although existing lobe pump and water ring pump combination unit have superiority in terms of maintaining vacuum, but can not set up vacuum, the old and new's equipment exists simultaneously, equipment unreasonable allocation, causes old equipment to leave unused for a long time, new equipment long-play, it is impossible to carry out maintaining.
Single vaccum-pumping equipment also exists cavitation or vaporization problem.The currently used water-ring vacuum pump of vaccum-pumping equipment or water jet air ejector, in order to make condenser reach more economical operating condition, require that vaccum-pumping equipment is close to longtime running under end vacuum state, water-ring vacuum pump is caused to produce cavitation, damage the rotor of pump, impeller ruptures, and the safe operation to equipment works the mischief.Water jet air ejector runs under end vacuum operating mode and there is vaporization phenomenon, defective nozzle and air ejector.
For cavitation or vaporization phenomenon, currently used water-ring vacuum pump or water jet air ejector suction capactity and suction flow are on the low side, and vacuum system does not reaches most economical vacuum values, are the key factors of restriction economy of power plant.
Either single-stage or the water-ring vacuum pump of twin-stage, or water jet air ejector, all indicate on its nameplate: vacuum pump end vacuum is 3.3KPa(or sucks absolute pressure), suction flow is the peak flow values that vacuum pump can reach, and its condition is standard atmosphere pressure, the end vacuum value that can reach when working solution temperature is 15 DEG C and suction flow.When working solution temperature raises, end vacuum value reduces, and flow also reduces；The water temperature of water ring vacuum pump is relatively big to its performance impact, and the performance curve of water ring vacuum pump is and records under the water temperature condition of 15 DEG C, and therefore when reality selects water ring vacuum pump, the suction flow of reply water ring vacuum pump is modified.Vacuum pump and the properly functioning operating mode of water jet air ejector are close to end vacuum value, and the temperature drift of working solution causes suction flow to reduce, about the 30-40% of peak flow values, and inefficiency, when summer condition, suction flow is lower.It is appreciated that water ring vacuum pump suction streams quantifier elimination from water temperature: if working solution temperature raises, the suction flow of vacuum pump also can reduce, until suction flow is zero.When suction capactity and suction flow reduce, condenser vacuum value reduces, affects the efficiency of unit.Vacuum pump suction flow under end vacuum value can reduce, and this is all vacuum pump characteristics；Water-ring vacuum pump, owing to using plate type heat exchanger, cleans not in time or cooling effect is poor, causes working solution temperature drift, and suction capactity declines.Some power plant use refrigeration plant to cool down water-ring vacuum pump working solution, improve the end vacuum value of vacuum pump, improve the suction capactity of vacuum pump, but when condenser is properly functioning, it is not necessary to the suction capactity that vacuum pump is the biggest, causes the waste of resource.Some power plant reduce vacuum pump working solution temperature, and condenser vacuum value is immediately raised, and also illustrate that working solution temperature is the biggest on suction capactity and the suction flow impact of vacuum pump.
It is higher to there is water temperature in Water jetting type vacuum pump, causes end vacuum value to reduce, and suction capactity reduces.The end vacuum value of Water jetting type vacuum pump is affected by working solution temperature, if the temperature of working solution reaches the saturation temperature of condenser vacuum value, the suction capactity of vacuum pump and suction flow reduce, and the only vacuum values of condenser reduces, vacuum pump could in condenser intake-gas.The vacuum values of condenser reduces, and the efficiency of unit reduces.
When existing vaccum-pumping equipment runs, the electrical power of consumption is higher, designs unreasonable.The energy of the many consumption of the most inefficient equipment is further converted into heat energy, improves the temperature of working solution, is degrading vacuum.Single vacuum pump meets the flow of needs when setting up vacuum, and maintains vacuum aspect less than normal, and maintenance cost is high, and the time between overhauls(TBO) is long.Lobe pump and water ring pump combination unit meet needs when maintaining vacuum, and can not set up vacuum, longtime running, it is impossible to maintaining.
Utility model content
Technical problem to be solved in the utility model is: provide a kind of Roots's water ring pump vacuum extractor, vent relief valve and air bleeding valve is devised for setting up vacuum aspect, can run continuously in the various vacuum ranges set up specified vacuum values from normal pressure, possess the ability setting up vacuum.The vacuum system of steam coagulation being added cooler simultaneously, reduce gas volume flow, run power low, the suction flow under end vacuum operating mode is big；Add lobe pump, higher than the most single vacuum pump pumping limit vacuum values, improve vacuum, make vacuum system can reach most economical operating condition；Improve water ring pump service condition, make the safety of equipment be improved.
This utility model be the technical scheme is that by the problem that solution is set forth above
nullA kind of Roots's water ring pump vacuum extractor，Including lobe pump、Bypass valve A、Bypass valve B、Vent relief valve、Cooler、Bypass valve C、Air bleeding valve、Water ring pump and separator，The porch of lobe pump connects condenser by pipeline，The increase of lobe pump improves end vacuum value，Suction capactity increases，The vacuum values making condenser is guaranteed，Bypass valve A and bypass valve B it is arranged in parallel respectively on lobe pump，The upper end of bypass valve B is provided with vent relief valve，Roots's delivery side of pump is connected with cooler by pipeline，The increase of cooler makes steam coagulation Cheng Shui，Reduce volume flow，Reduce latent heat of vaporization energy，The volume flow entering water ring pump is substantially reduced，After lobe pump compresses，The entrance making water ring pump improves，The cavitation operating mode of water ring pump can be effectively prevented from，Bypass valve C is set on the pipeline between lobe pump and cooler，The upper end of bypass valve C arranges air bleeding valve，Cooler is connected with the entrance of water ring pump by pipeline，Water ring pump is connected to the middle part of separator by pipeline.
Air cooling controller is set on described lobe pump, pump chamber and rotor are cooled down, make rotor and pump case keep the suitable temperature difference, improve equipment operational reliability.
On the pipeline of described water ring pump porch, non-return flap is set, prevents condensing aqueous reflux and enter the oil-in chamber of lobe pump, stop pump oil emulsifying.
Also set up cavitation protection pipe between described water ring pump and separator, prevent the pipeline generation cavitation between water ring pump and separator.
Operation principle of the present utility model: power and pressure reduction needed for lobe pump intake-gas are directly proportional, and once the pressure reduction of gas is in excess of the quota, arise that overload phenomenon.Vent relief valve and air bleeding valve are installed between the entrance and exit of lobe pump, after device starts, substantial amounts of gas discharged by lobe pump, drained in air by a water ring pump suction part, remaining part is drained in air by air bleeding valve, system is gradually pumped to negative pressure state by normal pressure, along with being gradually increased of system negative pressure, the pressure reduction of lobe pump reaches rated value, the pressured difference of vent relief valve automatically opens up, portion gas is back to lobe pump entrance, makes the pressure difference in regulation, lobe pump non-overloading between lobe pump entrance and exit.When negative pressure state occurs in lobe pump, air bleeding valve is automatically switched off, and lobe pump and water ring pump continue the negative pressure of raising system.When system negative pressure reaches certain negative pressure value, the pressure reduction of lobe pump is less than rated value, and vent relief valve is automatically switched off, and lobe pump expellant gas all drains into air by water ring pump suction.System can be run continuously by normal pressure to the various vacuum ranges set up specified vacuum values.
The beneficial effects of the utility model are: devise vent relief valve and air bleeding valve for setting up vacuum aspect, can run continuously from normal pressure, possess the ability setting up vacuum in the various vacuum ranges set up specified vacuum values.The vacuum system of steam coagulation being added cooler simultaneously, reduce gas volume flow, run power low, the suction flow under end vacuum operating mode is big；Add lobe pump, higher than the most single vacuum pump pumping limit vacuum values, improve vacuum, make vacuum system can reach most economical operating condition；Improve water ring pump service condition, make the safety of equipment be improved.
Accompanying drawing explanation
Fig. 1 is structural representation of the present utility model.
Wherein, 1-lobe pump, 2-bypass valve A, 3-bypass valve B, 4-vent relief valve, 5-cooler, 6-bypass valve C, 7-air bleeding valve, 8-water ring pump, 9-separator, 10-air cooling controller, 11-non-return flap, 12-cavitation protection pipe.
Detailed description of the invention
Further illustrate embodiment of the present utility model below in conjunction with the accompanying drawings.
nullWith reference to Fig. 1，A kind of Roots's water ring pump vacuum extractor described in this detailed description of the invention，Including lobe pump 1、Bypass valve A2、Bypass valve B3、Vent relief valve 4、Cooler 5、Bypass valve C6、Air bleeding valve 7、Water ring pump 8 and separator 9，The porch of lobe pump 1 connects condenser by pipeline，The increase of lobe pump 1 improves end vacuum value，Suction capactity increases，The vacuum values making condenser is guaranteed，Bypass valve A2 and bypass valve B3 it is arranged in parallel respectively on lobe pump 1，The upper end of bypass valve B3 is provided with vent relief valve 4，The outlet of lobe pump 1 is connected with cooler 5 by pipeline，The increase of cooler 5 makes steam coagulation Cheng Shui，Reduce volume flow，Reduce latent heat of vaporization energy，The volume flow entering water ring pump 8 is substantially reduced，After lobe pump 1 compresses，The entrance making water ring pump 8 improves，The cavitation operating mode of water ring pump 8 can be effectively prevented from，Bypass valve C6 is set on the pipeline between lobe pump 1 and cooler 5，The upper end of bypass valve C6 arranges air bleeding valve 7，Cooler 5 is connected with the entrance of water ring pump 8 by pipeline，Water ring pump 8 is connected to the middle part of separator 9 by pipeline.
On described lobe pump 1, air cooling controller 10 is set, pump chamber and rotor are cooled down, make rotor and pump case keep the suitable temperature difference, improve equipment operational reliability.
On the pipeline of described water ring pump 8 porch, non-return flap 11 is set, prevents condensing aqueous reflux and enter the oil-in chamber of lobe pump 1, stop pump oil emulsifying.
Also set up cavitation protection pipe 12 between described water ring pump 8 and separator 9, prevent the pipeline generation cavitation between water ring pump 8 and separator 9.
Operation principle of the present utility model: power and pressure reduction needed for lobe pump intake-gas are directly proportional, and once the pressure reduction of gas is in excess of the quota, arise that overload phenomenon.Vent relief valve and air bleeding valve are installed between the entrance and exit of lobe pump, after device starts, substantial amounts of gas discharged by lobe pump, drained in air by a water ring pump suction part, remaining part is drained in air by air bleeding valve, system is gradually pumped to negative pressure state by normal pressure, along with being gradually increased of system negative pressure, the pressure reduction of lobe pump reaches rated value, the pressured difference of vent relief valve automatically opens up, portion gas is back to lobe pump entrance, makes the pressure difference in regulation, lobe pump non-overloading between lobe pump entrance and exit.When negative pressure state occurs in lobe pump, air bleeding valve is automatically switched off, and lobe pump and water ring pump continue the negative pressure of raising system.When system negative pressure reaches certain negative pressure value, the pressure reduction of lobe pump is less than rated value, and vent relief valve is automatically switched off, and lobe pump expellant gas all drains into air by water ring pump suction.System can be run continuously by normal pressure to the various vacuum ranges set up specified vacuum values.
The beneficial effects of the utility model are: devise vent relief valve and air bleeding valve for setting up vacuum aspect, can run continuously from normal pressure, possess the ability setting up vacuum in the various vacuum ranges set up specified vacuum values.The vacuum system of steam coagulation being added cooler simultaneously, reduce gas volume flow, run power low, the suction flow under end vacuum operating mode is big；Add lobe pump, higher than the most single vacuum pump pumping limit vacuum values, improve vacuum, make vacuum system can reach most economical operating condition；Improve water ring pump service condition, make the safety of equipment be improved.
Specific embodiment of the utility model is not constituted restriction of the present utility model, and every employing analog structure of the present utility model and change, all in protection domain of the present utility model.
Claims (4)
- null1. Roots's water ring pump vacuum extractor，It is characterized in that: include lobe pump (1)、Bypass valve A(2)、Bypass valve B(3)、Vent relief valve (4)、Cooler (5)、Bypass valve C(6)、Air bleeding valve (7)、Water ring pump (8) and separator (9)，The porch of lobe pump (1) connects condenser by pipeline，Lobe pump is arranged in parallel bypass valve A(2 on (1) respectively) and bypass valve B(3)，Bypass valve B(3) upper end be provided with vent relief valve (4)，The outlet of lobe pump (1) is connected with cooler (5) by pipeline，On pipeline between lobe pump (1) and cooler (5), bypass valve C(6 is set)，Bypass valve C(6) upper end air bleeding valve (7) is set，Cooler (5) is connected with the entrance of water ring pump (8) by pipeline，Water ring pump (8) is connected to the middle part of separator (9) by pipeline.
- A kind of Roots's water ring pump vacuum extractor the most according to claim 1, it is characterised in that: on described lobe pump (1), air cooling controller (10) is set.
- A kind of Roots's water ring pump vacuum extractor the most according to claim 1, it is characterised in that: on the pipeline of described water ring pump (8) porch, non-return flap (11) is set.
- A kind of Roots's water ring pump vacuum extractor the most according to claim 3, it is characterised in that: also set up cavitation protection pipe (12) between described water ring pump (8) and separator (9).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201620295261.5U CN205559284U (en) | 2016-04-11 | 2016-04-11 | Roots's water ring pump evacuating device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201620295261.5U CN205559284U (en) | 2016-04-11 | 2016-04-11 | Roots's water ring pump evacuating device |
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| Publication Number | Publication Date |
|---|---|
| CN205559284U true CN205559284U (en) | 2016-09-07 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201620295261.5U Expired - Fee Related CN205559284U (en) | 2016-04-11 | 2016-04-11 | Roots's water ring pump evacuating device |
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| CN (1) | CN205559284U (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110617938A (en) * | 2019-10-30 | 2019-12-27 | 中国空气动力研究与发展中心低速空气动力研究所 | Large icing wind tunnel height simulation system |
| CN114109831A (en) * | 2021-11-08 | 2022-03-01 | 陕西飞机工业有限责任公司 | Water circulation control device for vacuum pump set |
-
2016
- 2016-04-11 CN CN201620295261.5U patent/CN205559284U/en not_active Expired - Fee Related
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110617938A (en) * | 2019-10-30 | 2019-12-27 | 中国空气动力研究与发展中心低速空气动力研究所 | Large icing wind tunnel height simulation system |
| CN114109831A (en) * | 2021-11-08 | 2022-03-01 | 陕西飞机工业有限责任公司 | Water circulation control device for vacuum pump set |
| CN114109831B (en) * | 2021-11-08 | 2023-05-23 | 陕西飞机工业有限责任公司 | Water circulation control device for vacuum pump set |
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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: 20160907 Termination date: 20170411 |