CN105545783A - Vacuum keeping system - Google Patents
Vacuum keeping system Download PDFInfo
- Publication number
- CN105545783A CN105545783A CN201610109102.6A CN201610109102A CN105545783A CN 105545783 A CN105545783 A CN 105545783A CN 201610109102 A CN201610109102 A CN 201610109102A CN 105545783 A CN105545783 A CN 105545783A
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- China
- Prior art keywords
- water ring
- vacuum
- moisture trap
- ring vaccum
- vaccum pump
- 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.)
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- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims abstract description 151
- 239000007788 liquid Substances 0.000 claims description 14
- 238000012423 maintenance Methods 0.000 claims 1
- 238000000034 method Methods 0.000 description 11
- 108010063955 thrombin receptor peptide (42-47) Proteins 0.000 description 3
- 230000009471 action Effects 0.000 description 2
- 230000007257 malfunction Effects 0.000 description 2
- 238000012986 modification Methods 0.000 description 2
- 230000004048 modification Effects 0.000 description 2
- 230000002159 abnormal effect Effects 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 239000000203 mixture Substances 0.000 description 1
- 238000012544 monitoring process Methods 0.000 description 1
- 238000005457 optimization Methods 0.000 description 1
- 230000008569 process Effects 0.000 description 1
- 230000001681 protective effect Effects 0.000 description 1
Classifications
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
- F04D—NON-POSITIVE-DISPLACEMENT PUMPS
- F04D25/00—Pumping installations or systems
- F04D25/16—Combinations of two or more pumps ; Producing two or more separate gas flows
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
- F04D—NON-POSITIVE-DISPLACEMENT PUMPS
- F04D17/00—Radial-flow pumps, e.g. centrifugal pumps; Helico-centrifugal pumps
- F04D17/08—Centrifugal pumps
- F04D17/18—Centrifugal pumps characterised by use of centrifugal force of liquids entrained in pumps
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
- F04D—NON-POSITIVE-DISPLACEMENT PUMPS
- F04D25/00—Pumping installations or systems
- F04D25/02—Units comprising pumps and their driving means
- F04D25/06—Units comprising pumps and their driving means the pump being electrically driven
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
- F04D—NON-POSITIVE-DISPLACEMENT PUMPS
- F04D27/00—Control, e.g. regulation, of pumps, pumping installations or pumping systems specially adapted for elastic fluids
- F04D27/008—Stop safety or alarm devices, e.g. stop-and-go control; Disposition of check-valves
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
- F04D—NON-POSITIVE-DISPLACEMENT PUMPS
- F04D29/00—Details, component parts, or accessories
- F04D29/002—Details, component parts, or accessories especially adapted for elastic fluid pumps
Landscapes
- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Applications Or Details Of Rotary Compressors (AREA)
- Compressors, Vaccum Pumps And Other Relevant Systems (AREA)
Abstract
The invention discloses a vacuum keeping system, and relates to the field of vacuum equipment. The vacuum keeping system comprises a control box, a water ring vacuum pump unit, a motor unit, a pre-positioned gas-water separator, a post-positioned gas-water separator and a control device; the water ring vacuum pump unit comprises a main water ring vacuum pump and a standby water ring vacuum pump; the motor unit comprises a first motor and a second motor, one end of the first motor is connected with the main water ring vacuum pump, the other end of the first motor is connected with the control box, one end of the second motor is connected with the standby water ring vacuum pump, and the other end of the second motor is connected with the control box; the pre-positioned gas-water separator is connected with a vacuum main pipe through a water inlet pipeline, the water inlet pipeline is provided with a switch valve connected with the control box, and the pre-positioned gas-water separator is in one-way communication with the main water ring vacuum pump and the standby water ring vacuum pump; the post-positioned gas-water separator is communicated with the main water ring vacuum pump and the standby water ring vacuum pump; one end of the control device is connected with the pre-positioned gas-water separator, and the other end of the control device is connected with the control box to be used for controlling starting and stopping of the main water ring vacuum pump and the standby water ring vacuum pump. According to the vacuum keeping system, the vacuum degree of an axially split centrifugal pump water inlet pipeline system can be automatically controlled.
Description
Technical field
The present invention relates to vacuum equipment field, be specifically related to a kind of vacuum keeping system.
Background technique
The effect of vacuum keeping system be by open evacuating air in centrifugal pump water inlet pipeline system for water, open centrifugal pump water inlet pipeline system for water in making and be in vacuum state, so that open the normal work under the state that centrifugal pump remains on vacuum in main frame always.But, in view of many reasons, often make the water inlet pipeline system for water degree of vacuum driving centrifugal pump in main frame reduce, cause in main frame, driving centrifugal pump and be in abnormal operating state, thus cause corresponding problem.
Traditional mode mainly adopts artificial mode, opens the degree of vacuum of centrifugal pump water inlet pipeline system for water in checking at set intervals, and its number of times is too frequent, efficiency is lower, and can not leave the monitoring of people, brings inconvenience to work.
Summary of the invention
For the defect existed in prior art, the object of the present invention is to provide the vacuum keeping system opening centrifugal pump water inlet pipeline system for water degree of vacuum in a kind of can automatically control.
For reaching above object, the technological scheme that the present invention takes is: a kind of vacuum keeping system, working under vacuum conditions, comprising for keeping driving centrifugal pump in the main frame that is connected with vacuum manifold,
Control box;
Water-ring vacuum pump assembly, it comprises main water ring vaccum pump and water ring vaccum pump for subsequent use;
Group of motors, it comprises the first motor and the second motor, and described first motor one end is connected with described main water ring vaccum pump, and the other end is connected with described control box, and described second motor one end is connected with described water ring vaccum pump for subsequent use, and the other end is connected with described control box;
Preposition moisture trap, it is connected with described vacuum manifold by intake pipe, described intake pipe is provided with switch valve, and described switch valve is connected with described control box, and described preposition moisture trap also with described main water ring vaccum pump and water ring vaccum pump unilaterally connected for subsequent use;
Rearmounted moisture trap, it is communicated with water ring vaccum pump for subsequent use with described main water ring vaccum pump; And
Control gear, its one end is connected with described preposition moisture trap, and the other end is connected with described control box, and described control gear controls the opening and closing of described main water ring vaccum pump and water ring vaccum pump for subsequent use.
On the basis of technique scheme, described control gear is pressure transducer, described pressure transducer is provided with degree of vacuum CLV ceiling limit value A and degree of vacuum lower limit B, if when the degree of vacuum in described preposition moisture trap reaches described degree of vacuum CLV ceiling limit value A, described main water ring vaccum pump and switch valve are closed, when degree of vacuum in described preposition moisture trap reaches described degree of vacuum lower limit B, described water ring vaccum pump for subsequent use is opened, described pressure transducer is also provided with limiting time, if described water ring vaccum pump for subsequent use fails to make the degree of vacuum in described preposition moisture trap reach described degree of vacuum CLV ceiling limit value A in described limiting time after opening, then described water ring vaccum pump for subsequent use is closed, described main water ring vaccum pump is opened.
On the basis of technique scheme, described degree of vacuum CLV ceiling limit value A is-70Kpa, and described degree of vacuum lower limit B is-40Kpa.
On the basis of technique scheme, described preposition moisture trap is provided with preposition moisture trap relief opening, described main water ring vaccum pump and water ring vaccum pump for subsequent use are equipped with the first suction port, the first suction port of described main water ring vaccum pump and being communicated with by one-way flow pipeline between the first suction port of preposition moisture trap relief opening and described water ring vaccum pump for subsequent use and preposition moisture trap relief opening.
On the basis of technique scheme, described one-way flow pipeline is provided with safety check.
On the basis of technique scheme, described main water ring vaccum pump and water ring vaccum pump for subsequent use are equipped with the second suction port and first row gas port, described rearmounted moisture trap is provided with the first rearmounted moisture trap relief opening and the first rearmounted moisture trap suction port, described first rearmounted moisture trap relief opening is communicated with the second suction port of described main water ring vaccum pump, and described first rearmounted moisture trap suction port is communicated with the first row gas port of described main water ring vaccum pump; Described rearmounted moisture trap is also provided with the second rearmounted moisture trap relief opening and the second rearmounted moisture trap suction port, described second rearmounted moisture trap relief opening is communicated with the second suction port of described water ring vaccum pump for subsequent use, and described second rearmounted moisture trap suction port is communicated with the first row gas port of described water ring vaccum pump for subsequent use.
On the basis of technique scheme, described vacuum keeping system also comprises level meter, and described level meter is connected with control box with described preposition moisture trap, and described level meter is provided with high level switch and low liquid-level switch.
On the basis of technique scheme, described vacuum keeping system also comprises self-priming pump, described self-priming pump is communicated with described preposition moisture trap, when in described preposition moisture trap, water level is to high liquid level, described self-priming pump is opened, when in described preposition moisture trap, water level is to low liquid level, described self-priming pump cuts out.
On the basis of technique scheme, described preposition moisture trap is also provided with pressure gauge.
On the basis of technique scheme, described switch valve is pneumatic on-off valve.
Compared with prior art, the invention has the advantages that:
Title of the present invention comprises main water ring vaccum pump, water ring vaccum pump for subsequent use and pressure transducer, can realize opening and closing automatically of main water ring vaccum pump and water ring vaccum pump for subsequent use by pressure transducer.Pressure transducer is provided with degree of vacuum CLV ceiling limit value A and degree of vacuum lower limit B, if when the degree of vacuum in preposition moisture trap reaches degree of vacuum CLV ceiling limit value A, main water ring vaccum pump and switch valve are closed, after this, if when the degree of vacuum in preposition moisture trap 4 reaches degree of vacuum lower limit B, water ring vaccum pump for subsequent use is opened, pressure transducer is also provided with limiting time, if water ring vaccum pump for subsequent use fails to make the degree of vacuum in preposition moisture trap 4 reach degree of vacuum CLV ceiling limit value A in limiting time after opening, then water ring vaccum pump 22 for subsequent use is closed, and main water ring vaccum pump is opened.Main water ring vaccum pump in the present invention and water ring vaccum pump for subsequent use; the using and the reserved; when water ring vaccum pump for subsequent use break down and cisco unity malfunction time; can automatically start main water ring vaccum pump; thus ensure that vacuum keeping system can work; ensure that in main frame that the water inlet pipeline system for water driving centrifugal pump reaches the vacuum requirement of needs, thus ensure that in main frame that driving centrifugal pump normally works, and drives centrifugal pump and does not shut down in guarantee fully.
Accompanying drawing explanation
Fig. 1 is the schematic diagram of vacuum keeping system in the present invention.
In figure: 1-control box, 2-Water-ring vacuum pump assembly, the main water ring vaccum pump of 21-, 22-water ring vaccum pump for subsequent use, 23-first suction port, 24-second suction port, 25-first row gas port, 3-group of motors, 31-first motor, 32-second motor, the preposition moisture trap of 4-, the preposition moisture trap relief opening of 41-, 5-intake pipe, 51-switch valve, the rearmounted moisture trap of 6-, the rearmounted moisture trap relief opening of 61-first, the rearmounted moisture trap suction port of 62-first, the rearmounted moisture trap relief opening of 63-second, the rearmounted moisture trap suction port of 64-second, 7-control gear, 8-one-way flow pipeline, 81-safety check, 9-level meter, 10-self-priming pump, 11-pressure gauge, 100-vacuum manifold, 200-conduit pipe.
Embodiment
Below in conjunction with accompanying drawing, the present invention is described in further detail.
Shown in Figure 1, the invention provides a kind of vacuum keeping system, it comprises control box 1, Water-ring vacuum pump assembly 2, group of motors 3, preposition moisture trap 4, intake pipe 5, rearmounted moisture trap 6, control gear 7, one-way flow pipeline 8, level meter 9, self-priming pump 10 and pressure gauge 11.
Control box 1 is the control end in the present invention, can be manipulated accordingly this vacuum keeping system very easily by control box 1.
Water-ring vacuum pump assembly 2 comprises main water ring vaccum pump 21 and water ring vaccum pump for subsequent use 22.Main water ring vaccum pump 21 and water ring vaccum pump for subsequent use 22 are equipped with the first suction port 23, second suction port 24 and first row gas port 25.
Group of motors 3 comprises the first motor 31 and second motor 32, first motor 31 one end is connected with main water ring vaccum pump 21, and the other end is connected with described control box 1, and second motor 32 one end is connected with water ring vaccum pump 22 for subsequent use, and the other end is connected with control box 1.Thus the opening and closing of Water-ring vacuum pump assembly 2 can be controlled by control box 1.
Preposition moisture trap 4, it is connected with vacuum manifold 100 by intake pipe 5, and intake pipe 5 is provided with switch valve 51, and switch valve 51 is connected with control box 1, and the switch valve 51 in the present invention is pneumatic on-off valve.Arranging preposition moisture trap 4 is because Water-ring vacuum pump assembly 2 centering opens centrifugal pump intake pipe when vacuumizing, and has water and gas is together sucked.In order to avoid excessive water enters Water-ring vacuum pump assembly 2, need to carry out once in advance being separated of gas and water.Preposition moisture trap 4 is provided with preposition moisture trap relief opening 41, is communicated with between the first suction port 23 of the first suction port 23 of main water ring vaccum pump 21 and preposition moisture trap relief opening 41 and water ring vaccum pump for subsequent use 22 and preposition moisture trap relief opening 41 by one-way flow pipeline 8.One-way flow pipeline 8 is provided with safety check 81, thus air water one direction can only flow into main water ring vaccum pump 21 and water ring vaccum pump for subsequent use 22 from preposition moisture trap 4.
Rearmounted moisture trap 6, it is provided with the first rearmounted moisture trap relief opening 61 and the first rearmounted moisture trap suction port 62 and the second rearmounted moisture trap relief opening 63 and the second rearmounted moisture trap suction port 64.Wherein the first rearmounted moisture trap relief opening 61 is communicated with the second suction port 24 of main water ring vaccum pump 21, and the first rearmounted moisture trap suction port 62 is communicated with the first row gas port 25 of main water ring vaccum pump 21.Second rearmounted moisture trap relief opening 63 is communicated with the second suction port 24 of water ring vaccum pump 22 for subsequent use, and the second rearmounted moisture trap suction port 64 is communicated with the first row gas port 25 of water ring vaccum pump 22 for subsequent use.The gas-liquid mixture that main water ring vaccum pump 21 and water ring vaccum pump 22 for subsequent use are discharged can be separated by rearmounted moisture trap 6, and then gas and water is discharged.
Control gear 7, its one end is connected with preposition moisture trap 4, and the other end is connected with control box 1, and control gear 7 controls the opening and closing of main water ring vaccum pump 21 and water ring vaccum pump for subsequent use 22 automatically.Control gear 7 in the present invention is pressure transducer, can realize opening and closing automatically of main water ring vaccum pump 21 and water ring vaccum pump for subsequent use 22 by pressure transducer.Pressure transducer is provided with degree of vacuum CLV ceiling limit value A and degree of vacuum lower limit B, if when the degree of vacuum in preposition moisture trap 4 reaches degree of vacuum CLV ceiling limit value A, main water ring vaccum pump 21 and switch valve 51 are closed, after this, if when the degree of vacuum in preposition moisture trap 4 reaches degree of vacuum lower limit B, water ring vaccum pump 22 for subsequent use is opened, pressure transducer is also provided with limiting time, if water ring vaccum pump 22 for subsequent use fails to make the degree of vacuum in preposition moisture trap 4 reach degree of vacuum CLV ceiling limit value A in limiting time after opening, then water ring vaccum pump 22 for subsequent use is closed, main water ring vaccum pump 21 is opened.Degree of vacuum CLV ceiling limit value A in the present invention is-70Kpa, and degree of vacuum lower limit B is-40Kpa, and its concrete numerical value can reasonable set according to actual needs, preposition moisture trap 4 is also provided with pressure gauge 11, conveniently can shows the degree of vacuum of preposition moisture trap 4.
Vacuum keeping system also comprises level meter 9, and level meter 9 is connected with control box 1 with preposition moisture trap 4, and level meter 9 is provided with high level switch and low liquid-level switch.Be unlikely to too high in order to ensure the water level in preposition moisture trap 4, too much water is made to be drawn in Water-ring vacuum pump assembly 2, preposition moisture trap 4 is also communicated with self-priming pump 10, when in preposition moisture trap 4, water level is to high liquid level, high level switch starts self-priming pump 10, and self-priming pump 10 starts to draw water.When in preposition moisture trap 4, water level is to low liquid level, self-priming pump 10 closed by low liquid-level switch.
In the present invention, the process of the startup optimization of vacuum keeping system device, stopping is as follows:
1. start main water ring vaccum pump 21;
2. open switch valve 51;
3. when preposition moisture trap 4 vacuum reaches degree of vacuum CLV ceiling limit value-70KPa, the main water ring vaccum pump 21 of pressure transducer action interlocking close, simultaneously closing switch valve 51;
4. when preposition moisture trap 4 water level is to high liquid level, liquid-level switch action, starts self-priming pump 10 draining, stops self-priming pump 10 to interlocking during low liquid level;
5. when preposition moisture trap 4 vacuum reaches degree of vacuum lower limit-40KPa, responded to by pressure transducer and start water ring vaccum pump 22 for subsequent use, if do not reach degree of vacuum CLV ceiling limit value-70KPa in limiting time, then start main water ring vaccum pump 21, close water ring vaccum pump 22 for subsequent use.
6. every 2 hours open switching valve 51 five seconds.
Main water ring vaccum pump 21 in the present invention and water ring vaccum pump for subsequent use 22, the using and the reserved, when water ring vaccum pump 22 for subsequent use break down and cisco unity malfunction time, automatically main water ring vaccum pump 21 can be started, thus ensure that vacuum keeping system can work, ensure that in main frame that the water inlet pipeline system for water driving centrifugal pump reaches the vacuum requirement of needs, thus ensure that in main frame that driving centrifugal pump normally works fully, drive centrifugal pump in guarantee not shut down, every a kind of protective measure that 2 hours open switching valve 51 five seconds are to keep existing vacuum in conduit pipe 200 not reduce, further ensure in main frame the degree of vacuum of the water inlet pipeline system for water driving centrifugal pump.
The present invention is not limited to above-mentioned mode of execution, and for those skilled in the art, under the premise without departing from the principles of the invention, can also make some improvements and modifications, these improvements and modifications are also considered as within protection scope of the present invention.The content be not described in detail in this specification belongs to the known prior art of professional and technical personnel in the field.
Claims (10)
1. a vacuum keeping system, working under vacuum conditions for driving centrifugal pump in the main frame that maintenance is connected with vacuum manifold (100), it is characterized in that: comprise,
Control box (1);
Water-ring vacuum pump assembly (2), it comprises main water ring vaccum pump (21) and water ring vaccum pump for subsequent use (22);
Group of motors (3), it comprises the first motor (31) and the second motor (32), described first motor (31) one end is connected with described main water ring vaccum pump (21), the other end is connected with described control box (1), described second motor (32) one end is connected with described water ring vaccum pump for subsequent use (22), and the other end is connected with described control box (1);
Preposition moisture trap (4), it is connected with described vacuum manifold (100) by intake pipe (5), described intake pipe (5) is provided with switch valve (51), described switch valve (51) is connected with described control box (1), and described preposition moisture trap (4) also with described main water ring vaccum pump (21) and water ring vaccum pump for subsequent use (22) unilaterally connected;
Rearmounted moisture trap (6), it is communicated with water ring vaccum pump for subsequent use (22) with described main water ring vaccum pump (21); And
Control gear (7), its one end is connected with described preposition moisture trap (4), the other end is connected with described control box (1), and described control gear (7) controls the opening and closing of described main water ring vaccum pump (21) and water ring vaccum pump for subsequent use (22).
2. vacuum keeping system as claimed in claim 1, it is characterized in that: described control gear (7) is pressure transducer, described pressure transducer is provided with degree of vacuum CLV ceiling limit value A and degree of vacuum lower limit B, if when the degree of vacuum in described preposition moisture trap (4) reaches described degree of vacuum CLV ceiling limit value A, described main water ring vaccum pump (21) and switch valve (51) are closed, when degree of vacuum in described preposition moisture trap (4) reaches described degree of vacuum lower limit B, described water ring vaccum pump for subsequent use (22) is opened, described pressure transducer is also provided with limiting time, if described water ring vaccum pump for subsequent use (22) is failed to make the degree of vacuum in described preposition moisture trap (4) reach described degree of vacuum CLV ceiling limit value A in described limiting time after opening, then described water ring vaccum pump for subsequent use (22) is closed, described main water ring vaccum pump (21) is opened.
3. vacuum keeping system as claimed in claim 2, it is characterized in that: described degree of vacuum CLV ceiling limit value A is-70Kpa, described degree of vacuum lower limit B is-40Kpa.
4. vacuum keeping system as claimed in claim 1, it is characterized in that: described preposition moisture trap (4) is provided with preposition moisture trap relief opening (41), described main water ring vaccum pump (21) and water ring vaccum pump for subsequent use (22) are equipped with the first suction port (23), first suction port (23) of described main water ring vaccum pump (21) and between first suction port (23) of preposition moisture trap relief opening (41) and described water ring vaccum pump for subsequent use (22) and preposition moisture trap relief opening (41) by one-way flow pipeline (8) be communicated with.
5. vacuum keeping system as claimed in claim 4, is characterized in that: described one-way flow pipeline (8) is provided with safety check (81).
6. vacuum keeping system as claimed in claim 1, it is characterized in that: described main water ring vaccum pump (21) and water ring vaccum pump for subsequent use (22) are equipped with the second suction port (24) and first row gas port (25), described rearmounted moisture trap (6) is provided with the first rearmounted moisture trap relief opening (61) and the first rearmounted moisture trap suction port (62), described first rearmounted moisture trap relief opening (61) is communicated with second suction port (24) of described main water ring vaccum pump (21), described first rearmounted moisture trap suction port (62) is communicated with the first row gas port (25) of described main water ring vaccum pump (21), described rearmounted moisture trap (6) is also provided with the second rearmounted moisture trap relief opening (63) and the second rearmounted moisture trap suction port (64), described second rearmounted moisture trap relief opening (63) is communicated with second suction port (24) of described water ring vaccum pump for subsequent use (22), and described second rearmounted moisture trap suction port (64) is communicated with the first row gas port (25) of described water ring vaccum pump for subsequent use (22).
7. vacuum keeping system as claimed in claim 1, it is characterized in that: described vacuum keeping system also comprises level meter (9), described level meter (9) is connected with control box (1) with described preposition moisture trap (4), and described level meter (9) is provided with high level switch and low liquid-level switch.
8. vacuum keeping system as claimed in claim 7, it is characterized in that: described vacuum keeping system also comprises self-priming pump (10), described self-priming pump (10) is communicated with described preposition moisture trap (4), when the interior water level of described preposition moisture trap (4) is to high liquid level, described self-priming pump (10) is opened, when the interior water level of described preposition moisture trap (4) is to low liquid level, described self-priming pump (10) cuts out.
9. vacuum keeping system as claimed in claim 1, is characterized in that: described preposition moisture trap (4) is also provided with pressure gauge (11).
10. vacuum keeping system as claimed in claim 1, is characterized in that: described switch valve (51) is pneumatic on-off valve.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201610109102.6A CN105545783B (en) | 2016-02-26 | 2016-02-26 | Vacuum keeps system |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201610109102.6A CN105545783B (en) | 2016-02-26 | 2016-02-26 | Vacuum keeps system |
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| CN105545783A true CN105545783A (en) | 2016-05-04 |
| CN105545783B CN105545783B (en) | 2018-07-27 |
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| CN201610109102.6A Active CN105545783B (en) | 2016-02-26 | 2016-02-26 | Vacuum keeps system |
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| CN202954970U (en) * | 2012-11-01 | 2013-05-29 | 淄博水环真空泵厂有限公司 | Efficient water ring vacuum pump complete device with oversized sucking rate |
| CN203090017U (en) * | 2013-03-20 | 2013-07-31 | 烟台冰科医疗科技有限公司 | Medical center suction system |
| CN203239641U (en) * | 2013-05-09 | 2013-10-16 | 大唐苏州热电有限责任公司 | Vacuum pumping system adopting two lines of cooling water for vacuum pump cooler |
| CN103939373A (en) * | 2014-04-01 | 2014-07-23 | 广东省佛山水泵厂有限公司 | Atmosphere ejector control system in water ring vacuum pump unit and atmosphere ejector control method |
| CN105202936A (en) * | 2015-10-10 | 2015-12-30 | 中联西北工程设计研究院有限公司 | Low-energy-consumption condenser variable frequency vacuum system |
| CN205446126U (en) * | 2016-02-26 | 2016-08-10 | 武汉艾德沃泵阀有限公司 | Vacuum keeps system |
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| Publication number | Publication date |
|---|---|
| CN105545783B (en) | 2018-07-27 |
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Denomination of invention: Vacuum holding system Effective date of registration: 20220713 Granted publication date: 20180727 Pledgee: Bank of China Limited Wuhan Municipal sub branch Pledgor: WUHAN EDW PUMP & VALVE CO.,LTD. Registration number: Y2022420000226 |