CN201265528Y - Full-pneumatic pressure control and flow regulation system of helical-lobe compressor - Google Patents
Full-pneumatic pressure control and flow regulation system of helical-lobe compressor Download PDFInfo
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- CN201265528Y CN201265528Y CNU200820160670XU CN200820160670U CN201265528Y CN 201265528 Y CN201265528 Y CN 201265528Y CN U200820160670X U CNU200820160670X U CN U200820160670XU CN 200820160670 U CN200820160670 U CN 200820160670U CN 201265528 Y CN201265528 Y CN 201265528Y
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Abstract
The utility model relates to a fully pneumatic pressure control and flow regulating system for a screw rod compressor, which comprises an air inlet control valve (2) connected with a compressor (1). The fully pneumatic pressure control and flow regulating system is characterized in that the control end of the air inlet control valve (2) is connected with an inverse proportion valve (4) through an air pipe, the inverse proportion valve (4) is communicated with one communicating points of a normally opened type vent valve (5) and a normally closed type vent valve (6), the other communicating points of the normal opened type vent valve (5) and the normally closed type vent valve (6) are connected with the control end of a first maximum pressure selector valve (7), one air inlet end of the first maximum pressure selector valve (7) is connected with the air inlet control valve (2), the other air inlet end of the first maximum pressure selector valve (7) is connected with the output end of a pneumatic type pressure switch (8), the air inlet end of the pneumatic type pressure switch (8) is connected with a second maximum pressure selector valve (9), the second maximum pressure selector valve (9) is connected in parallel on a compressed air output pipeline (12) of the compressor, and the air inlet end of a vent valve (14) is connected with a pressure releasing port of an oil-air separator (10). The utility model has the advantages of high anti-explosion safety, reliable control, low cost and novel structure.
Description
Technical field
The utility model relates to a kind of helical-lobe compressor pressure and flow control technique, especially a kind of pressure of explosion-proof helical-lobe compressor and flow control system, specifically a kind of full Pneumatic pressure control and flow control system.
Background technique
At present, the pressure control and the Flow-rate adjustment of general compressor are to realize by electrical feedback signal, and solenoid valve and pressure transmitter are indispensable therebetween primary components.Load at unit so, the keying switching of solenoid valve and the transmission of signal inevitably can produce electrical spark in the off-load process, this in the colliery, the higher workplaces of environment requirement of explosion proof such as oil field, chemical industry are definitely unallowed.Therefore existing this type of all needs to adopt explosion-proof electric apparatus to the electrical apparatus element in the explosion-proof compressor that requirement arranged, and not only increased manufacture cost, and increased installation volume and difficulty
Summary of the invention
The purpose of this utility model is to need a large amount of explosion-proof electric apparatuses that use to cause the manufacture cost height, make the big problem of installation difficulty at existing explosion-proof compressor pressure control, designs a kind of full Pneumatic pressure control and flow control system.
The technical solution of the utility model is:
Full Pneumatic pressure control of a kind of helical-lobe compressor and flow control system, comprise the air intake control valve 2 that links to each other with the suction port of compressor 1, the inlet end that it is characterized in that described air intake control valve 2 links to each other with air-strainer 3, the control end of air intake control valve 2 links to each other with an end of inverse proportion valve 4 by tracheae, the other end of inverse proportion valve 4 communicates by the connectivity points of tracheae with atmospheric valve 5 open in usual and Normally closed type atmospheric valve and Normally closed type atmospheric valve 6, another connectivity points of atmospheric valve 5 open in usual and Normally closed type atmospheric valve and Normally closed type atmospheric valve 6 links to each other with the control end of the first pressure maximum selector valve 7, an inlet end of the first pressure maximum selector valve 7 links to each other with air intake control valve 2, another inlet end of the first pressure maximum selector valve 7 links to each other with the output terminal of pneumatic type pressure switch 8, the inlet end of pneumatic type pressure switch 8 links to each other with the control end of the second pressure maximum selector valve 9, the second pressure maximum selector valve 9 is attempted by on the deaerator 10 and the pipeline between the aftercooler 11 that the pressurized gas output pipe 12 of compressor promptly links to each other with compressor 1, the control end of going back and be connected to the 3rd pressure maximum selector valve 13, the three pressure maximum selector valves 13 on the pressurized gas output pipe 12 of compressor links to each other with the suction port of atmospheric valve 5 open in usual; The control end of atmospheric valve 14 links to each other with air intake control valve 2, and atmospheric valve 14 inlet ends link to each other with the pressure relief opening of deaerator 10, and the outlet side of atmospheric valve 14 links to each other with the inlet end of Normally closed type atmospheric valve 6.
The beneficial effects of the utility model:
The utility model has been abandoned the traditional method of electrical signal feedback control at the particularity of explosion-proof environment, utilizes the variation of gas pressure of system own and pressure control and the Flow-rate adjustment that necessary pneumatic valve is realized whole unit is set.It has the explosion-proof security height, and control is reliable, cost is low, the advantage of novel structure, for explosive gas atmosphere provides cheap and good-quality air compressor.
The utility model also can be applicable in other similarly has the compressor of requirement of explosion proof.
Description of drawings
Fig. 1 is a regulating system schematic representation of the present utility model.
Among the figure: 15 is anti-explosion motor, and 16 is manual loading/feather valve, and 17 is thermal switch, and 18 is safety valve, and 19 is minimum pressure valve, and 20 is thermostat valve, and 21 is differential pressure switch, and 22 is oil strainer, and 23 is blowdown valve, and 24 is explosion-proof fan.
Embodiment
Below in conjunction with drawings and Examples the utility model is further described.
As shown in Figure 1.
Full Pneumatic pressure control of a kind of helical-lobe compressor and flow control system, comprise the air intake control valve 2 that links to each other with the suction port of compressor 1, the inlet end of described air intake control valve 2 links to each other with air-strainer 3, the control end of air intake control valve 2 links to each other with an end of inverse proportion valve 4 by tracheae, the other end of inverse proportion valve 4 communicates by the connectivity points of tracheae with atmospheric valve 5 open in usual and Normally closed type atmospheric valve and Normally closed type atmospheric valve 6, another connectivity points of atmospheric valve 5 open in usual and Normally closed type atmospheric valve and Normally closed type atmospheric valve 6 links to each other with the control end of the first pressure maximum selector valve 7, an inlet end of the first pressure maximum selector valve 7 links to each other with air intake control valve 2, another inlet end of the first pressure maximum selector valve 7 links to each other with the output terminal of pneumatic type pressure switch 8, the inlet end of pneumatic type pressure switch 8 links to each other with the control end of the second pressure maximum selector valve 9, the second pressure maximum selector valve 9 is attempted by on the deaerator 10 and the pipeline between the aftercooler 11 that the pressurized gas output pipe 12 of compressor promptly links to each other with compressor 1, the control end of going back and be connected to the 3rd pressure maximum selector valve 13, the three pressure maximum selector valves 13 on the pressurized gas output pipe 12 of compressor links to each other with the suction port of atmospheric valve 5 open in usual; The control end of atmospheric valve 14 links to each other with air intake control valve 2, and atmospheric valve 14 inlet ends link to each other with the pressure relief opening of deaerator 10, and the outlet side of atmospheric valve 14 links to each other with the inlet end of Normally closed type atmospheric valve 6.
Working procedure of the present utility model is:
At first compressor 1 starts, and the air inlet of interior circulation inlet hole forms system pressure and opens air intake control valve 2, load operation.
If user's usefulness gas consumption is during less than the compressor output quantity, ductwork pressure raises.When pressure reaches the pressure unloading of pneumatic type pressure switch 8 settings, pneumatic type pressure switch 8 delivery pressure signals, this pressure signal is closed atmospheric valve 5 open in usual, opens Normally closed type atmospheric valve 6 simultaneously again.Like this, atmospheric valve 5 open in usual has cut off the pipeline that leads to inverse proportion valve 4, and the pressure in this pipeline of Normally closed type atmospheric valve 6 emptying simultaneously impels air intake control valve 2 valve closings, atmospheric valve 14) carry out emptying, compressor enters the off-load working state.
If ductwork pressure drops to the set induced pressure of pneumatic type pressure switch 8, then pneumatic type pressure switch 8 is exported with regard to no signal, atmospheric valve 5 open in usual, Normally closed type atmospheric valve 6 lose pressure signal and restore, and control system impels air intake control valve 2 to open, and compressor enters the loaded work piece state again.
When compressor shutdown, the pressure signal below the air intake control valve safety check makes the whole emptying of pilot pressure, and the pressure in the compressor is by atmospheric valve 14 emptying.
The utility model does not relate to the part prior art that maybe can adopt all same as the prior art to be realized.
Claims (1)
1, full Pneumatic pressure control of a kind of helical-lobe compressor and flow control system, comprise the air intake control valve (2) that links to each other with the suction port of compressor (1), the inlet end of described air intake control valve (2) links to each other with air-strainer (3), the control end that it is characterized in that air intake control valve (2) links to each other by the end of tracheae with inverse proportion valve (4), the other end of inverse proportion valve (4) communicates by the connectivity points of tracheae with atmospheric valve open in usual (5) and Normally closed type atmospheric valve and Normally closed type atmospheric valve (6), another connectivity points of atmospheric valve open in usual (5) and Normally closed type atmospheric valve and Normally closed type atmospheric valve (6) links to each other with the control end of the first pressure maximum selector valve (7), an inlet end of the first pressure maximum selector valve (7) links to each other with air intake control valve (2), another inlet end of the first pressure maximum selector valve (7) links to each other with the output terminal of pneumatic type pressure switch (8), the inlet end of pneumatic type pressure switch (8) links to each other with the control end of the second pressure maximum selector valve (9), the second pressure maximum selector valve (9) is attempted by on the deaerator (10) and the pipeline between the aftercooler (11) that the pressurized gas output pipe (12) of compressor promptly links to each other with compressor (1), the pressurized gas output pipe (12) of compressor is gone up also and is connected to the 3rd pressure maximum selector valve (13), and the control end of the 3rd pressure maximum selector valve (13) links to each other with the suction port of atmospheric valve open in usual (5); The control end of atmospheric valve (14) links to each other with air intake control valve (2), and atmospheric valve (14) inlet end links to each other with the pressure relief opening of deaerator (10), and the outlet side of atmospheric valve (14) links to each other with the inlet end of Normally closed type atmospheric valve (6).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNU200820160670XU CN201265528Y (en) | 2008-10-14 | 2008-10-14 | Full-pneumatic pressure control and flow regulation system of helical-lobe compressor |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNU200820160670XU CN201265528Y (en) | 2008-10-14 | 2008-10-14 | Full-pneumatic pressure control and flow regulation system of helical-lobe compressor |
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| CN201265528Y true CN201265528Y (en) | 2009-07-01 |
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| Application Number | Title | Priority Date | Filing Date |
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| CNU200820160670XU Expired - Fee Related CN201265528Y (en) | 2008-10-14 | 2008-10-14 | Full-pneumatic pressure control and flow regulation system of helical-lobe compressor |
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| CN (1) | CN201265528Y (en) |
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101943165A (en) * | 2010-09-09 | 2011-01-12 | 无锡压缩机股份有限公司 | Pneumatic control overflow system for mobile screw compressor |
| CN103003116A (en) * | 2010-04-16 | 2013-03-27 | 克诺尔-布里姆斯轨道车辆系统有限公司 | Control valve for an oil-injected screw-type compressor |
| CN103306981A (en) * | 2012-03-12 | 2013-09-18 | 上海斯可络压缩机有限公司 | Double-screw air compressor |
| CN103321934A (en) * | 2013-06-24 | 2013-09-25 | 河南龙宇煤化工有限公司 | System for preventing reverse rotation of large-sized centrifugal compressor |
| CN109937304A (en) * | 2016-09-21 | 2019-06-25 | 克诺尔商用车制动系统有限公司 | Screw compressor for commercial vehicle |
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2008
- 2008-10-14 CN CNU200820160670XU patent/CN201265528Y/en not_active Expired - Fee Related
Cited By (11)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103003116A (en) * | 2010-04-16 | 2013-03-27 | 克诺尔-布里姆斯轨道车辆系统有限公司 | Control valve for an oil-injected screw-type compressor |
| CN103003116B (en) * | 2010-04-16 | 2015-11-25 | 克诺尔-布里姆斯轨道车辆系统有限公司 | For being injected into the control cock of the screw compressor of oil |
| US9347448B2 (en) | 2010-04-16 | 2016-05-24 | Knorr-Bremse Systeme Fur Schienenfahrzeuge Gmbh | Control valve for an oil-injected screw-type compressor |
| CN101943165A (en) * | 2010-09-09 | 2011-01-12 | 无锡压缩机股份有限公司 | Pneumatic control overflow system for mobile screw compressor |
| CN101943165B (en) * | 2010-09-09 | 2012-07-04 | 无锡压缩机股份有限公司 | Pneumatic control overflow system for mobile screw compressor |
| CN103306981A (en) * | 2012-03-12 | 2013-09-18 | 上海斯可络压缩机有限公司 | Double-screw air compressor |
| CN103321934A (en) * | 2013-06-24 | 2013-09-25 | 河南龙宇煤化工有限公司 | System for preventing reverse rotation of large-sized centrifugal compressor |
| CN103321934B (en) * | 2013-06-24 | 2015-07-29 | 河南龙宇煤化工有限公司 | Prevent the system that Large centrifugal compressors reverses |
| CN109937304A (en) * | 2016-09-21 | 2019-06-25 | 克诺尔商用车制动系统有限公司 | Screw compressor for commercial vehicle |
| CN109937304B (en) * | 2016-09-21 | 2021-06-04 | 克诺尔商用车制动系统有限公司 | Screw compressor for a commercial vehicle |
| US11286938B2 (en) | 2016-09-21 | 2022-03-29 | Knorr-Bremse Systeme Fuer Nutzfahrzeuge Gmbh | Oil separator and relief valve of a screw compressor for a utility vehicle |
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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: 20090701 Termination date: 20161014 |