CN101477088B - Driving device for gas sampling switching valve - Google Patents
Driving device for gas sampling switching valve Download PDFInfo
- Publication number
- CN101477088B CN101477088B CN2008102498798A CN200810249879A CN101477088B CN 101477088 B CN101477088 B CN 101477088B CN 2008102498798 A CN2008102498798 A CN 2008102498798A CN 200810249879 A CN200810249879 A CN 200810249879A CN 101477088 B CN101477088 B CN 101477088B
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- switching valve
- transmission
- sampling switching
- transmission body
- transmission shaft
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- Mechanically-Actuated Valves (AREA)
Abstract
The invention relates to a gas sampling switching valve driving device of a gas phase chromatographic instrument having low manufacturing cost. The driving device comprises a gas sampling switching valve, a fixed bracket, a reducing motor and a brake adapting shaft coupling, wherein the gas sampling switching valve and the reducing motor are arranged on the fixed bracket; the brake adapting shaft coupling comprises a transmission body and a sampling switching valve connection sleeve; the middle part of the transmission body is provided with a through hole; the inner side wall of the through hole is provided with a circle of transmission body lug boss; the shaft of the decelerating electric machine is provided with a decelerating electric machine transmission shaft; a transmission shaft on the left side of the transmission body lug boss inside the through hole in the middle of the transmission body is provided with a circle of transmission shaft lug boss; a transmission shaft on the right side of the transmission body lug boss inside the through hole is provided with a slider; a transmission shaft on the right side of the slider is provided with a sliding gasket; a transmission shaft on the right side of the sliding gasket is provided with a wavy spring; and a transmission shaft on the right side of the wavy spring is provided with a torque force adjustment nut by means of screw thread.
Description
Technical field
The present invention relates to the drive unit of transfer valve between a kind of gas chromatograph, other analytical instrument gas sampling and chromatographic column, relate in particular to a kind of gas sampling of analytical instrument and the drive unit that the gas analysis process flows to transfer valve.
Background technology
The gas automatic sampling switching is meant in gas chromatographic analysis or other chemical analysis automatic by a valve member (gear train that comprises it), periodically, taking a sample in sample line quantitatively is sent to chromatographic column by carrier gas then or other analysis mode is carried out compartment analysis.The gas automatic sampling transfer valve of comparative maturity has pneumatic membrane type six logical sample valves, six logical pull bar valves, six-plane valve at present.The six-plane valve is more satisfactory valve member, and serviceability temperature is higher, and the life-span is long, and is corrosion-resistant, and dead volume is little, and impermeability is good, can under low pressure use.Also can be processed as eight and lead to, ten is logical, and ten two-port valves are to satisfy the requirement of multiple tracks.
As sampling switching valve, it comprises circular flap (rotor) and fixed valve base (stator) two parts to most automatic samplers with six-way injection valve.Valve seat is connected to analyzes gas circuit, quantity tube, sample holes and other peripheral components, and valve seat generally is with high-abrasive material manufacturings such as stainless steels.Flap and valve seat are combined closely, and can rotate the switching that flap carries out the pilot-gas sample introduction during operation.The auto injection transfer valve is driven by electronic or air motor, and the hand sampling transfer valve then is to have connected a handle on flap.
Sampling switching valve has multiple type of drive: (1) hand sampling transfer valve; (2) air impeller sampling switching valve: can be divided into air cylinder driven and air motor dual mode; (3) motor driver sampling switching valve: generally select stepper motor for use; (4) microelectronics driver sampling switching valve.
Gas sampling, the handoff technique of gas chromatograph and partial analysis instrument use at present, basic adopt pneumatic or stepper motor as the key device that drives, stepper motor rotates the flap that drives in the sampling switching valve and rotates, when flap turns an angle, flap stops operating automatically, sampling switching valve is opened, and gas is by sampling switching valve, and flap stops operating and the stepper motor inconsistent damage that causes sampling switching valve easily that stops operating.This kind stepper motor structure and control system complexity, noise is bigger, main parts size and control system mostly are import, cost an arm and a leg, domestic common customer is difficult to bear, but most of demestic user must select imported product because of the restriction of homemade like product technology and working ability, and the auto injection handoff technique that has also restricted domestic equipment is used.
Summary of the invention
The driving device for gas sampling switching valve that the purpose of this invention is to provide a kind of low cost of manufacture.
To achieve these goals, the technical scheme that the present invention takes is: a kind of driving device for gas sampling switching valve, comprising gas sampling switching valve, fixed support, gas sampling switching valve is comprising valve body, valve, flap, drive rotating shaft, gas sampling switching valve is installed on the fixed support, its characteristics are: this driving device for gas sampling switching valve also comprises reducing motor, the adaptive shaft coupling of clutch, reducing motor is installed on the fixed support, the adaptive shaft coupling of clutch is comprising the transmission body on right side, the sampling switching valve adapter sleeve in left side, the sampling switching valve adapter sleeve respectively with gas sampling switching valve, transmission body is fixedly connected, have a through hole in the middle of the transmission body, have a border transmission body boss on the transmission body intermediate throughholes madial wall, the reducing motor transmission shaft is installed on the reducing motor axle, the reducing motor transmission shaft inserts in the transmission body intermediate throughholes in left side, have all ring drive shaft boss on the transmission shaft in transmission body boss left side in the transmission body intermediate throughholes, the transmission body boss is corresponding with the transmission shaft boss, on the transmission shaft on transmission body boss right side slide is installed in the transmission body intermediate throughholes, on the transmission shaft on slide right side sliding gasket is installed, on the transmission shaft on sliding gasket right side wavy spring is installed, screw thread is installed the torsion setting nut on the transmission shaft on wavy spring right side.
Advantageous effect of the present invention is: structure of the present invention and control system are simple, reliably, gas sampling switching valve processing and manufacturing accuracy requirement is lower among the present invention, manufacturing cost of the present invention and use cost are low, reducing motor among the present invention, transmission body in the adaptive shaft coupling of clutch, the sampling switching valve adapter sleeve, the reducing motor transmission shaft, slide, sliding gasket, wavy spring, the torsion setting nut is collectively referred to as valve actuator, the present invention has increased the suitability between valve actuator and gas sampling switching valve, one cover valve actuator is regulated moment of torsion by regulating the torsion setting nut, get final product the gas sampling switching valve of adaptive different torsion and switching corner, the present invention is easy to realize automatic control, and simple in structure, significantly reduced production cost.
Description of drawings
Fig. 1 is a kind of structural representation of the present invention;
Fig. 2 is the structural representation of the adaptive shaft coupling of clutch among a kind of the present invention.
Embodiment
Below in conjunction with accompanying drawing and specific embodiment the present invention is described further:
As Fig. 1, shown in 2, a kind of driving device for gas sampling switching valve, comprising gas sampling switching valve 1, fixed support 2, gas sampling switching valve 1 is comprising valve body, valve, flap, drive rotating shaft, gas sampling switching valve 1 is installed on the fixed support 2, this driving device for gas sampling switching valve also comprises reducing motor 5, the adaptive shaft coupling 3 of clutch, reducing motor 5 is installed on the fixed support 2, the adaptive shaft coupling 3 of clutch is comprising the transmission body 8 on right side, the sampling switching valve adapter sleeve 6 in left side, sampling switching valve adapter sleeve 6 respectively with gas sampling switching valve 1, transmission body 8 is fixedly connected, have a through hole in the middle of the transmission body 8, have a border transmission body boss 4 on the transmission body 8 intermediate throughholes madial walls, on 5 of the reducing motors reducing motor transmission shaft 7 is installed, reducing motor transmission shaft 7 inserts in transmission body 8 intermediate throughholes in left side, have all ring drive shaft boss on the transmission shaft 7 in transmission body boss 4 left sides in transmission body 8 intermediate throughholes, transmission body boss 4 is corresponding with the transmission shaft boss, on the transmission shaft 7 on transmission body boss 4 right sides slide 9 is installed in transmission body 8 intermediate throughholes, on the transmission shaft 7 on slide 9 right sides sliding gasket 10 is installed, on the transmission shaft 7 on sliding gasket 10 right sides wavy spring 11 is installed, screw thread is installed torsion setting nut 12 on the transmission shaft 7 on wavy spring 11 right sides.
Use when of the present invention, reducing motor 5 rotates and drives transmission shaft 7 rotations, wavy spring 11, sliding gasket 10 rotates with transmission shaft 7, transmission shaft 7 rotates by the friction force between sliding gasket 10 and the slide 9, friction force between transmission body boss 4 and the transmission shaft boss drives transmission body 8 and rotates, slide 9 rotates with transmission body 8, transmission body 8 is rotated and is driven 6 rotations of sampling switching valve adapter sleeve, the flap that sampling switching valve adapter sleeve 6 rotating bands are taken offence in the body sampling switching valve 1 rotates, when flap turns an angle, flap stops operating automatically, sampling switching valve adapter sleeve 6 stops operating, transmission body 8 stops operating, transmission shaft 7 idle running so just can not cause the damage of gas sampling switching valve 1.Therefore the present invention can be transshipped use, and gas sampling switching valve 1 that can adaptive different torsion, and can protect relevant gas sampling switching valve 1 and reducing motor 5 effectively.
Among the present invention, reducing motor 5 can be selected the DC reducing motor for use, regulate the corner of motor by changing the motor power-on time, the maximum of setting on driving corner one threshold quantity of motor greater than gas sampling switching valve 1 is switched corner, make the gas sampling switching valve 1 that the present invention can adaptive switching corner varies in size (as four-way, six logical, eight logical, ten logical etc.).
Among the present invention; transmission shaft 7 forms sliding friction surface with the surface of contact of transmission body 8; and carry-over moment; regulate the pressure of transmission shaft 7 and 8 rubbing surfaces of transmission body by torsion setting nut 12; change and set the size of the moment of torsion that transmits thus; when reducing motor 5 driving forces are switched resistance greater than gas sampling switching valve 1; transmission shaft 7 forms relative slip with the rubbing surface of 8 of transmission body; make the transmission moment of torsion reach constant, can protect relevant gas sampling switching valve 1 and reducing motor 5 not to cause damage effectively because of overload.
Among the present invention, gas sampling switching valve 1 is made of valve body, valve, flap, driving rotating shaft, after finishing sampling by quantity tube, when needing sample introduction or switching, drive flap and rotate to an angle by driving rotating shaft, promptly finish single injected sampling or switching, after certain hour is finished in single injected sampling or switching, the driving rotating shaft drives flap opposite spin respective angles again and resets, and waits for sample introduction or switching next time.
Claims (1)
1. driving device for gas sampling switching valve, comprising gas sampling switching valve (1), fixed support (2), gas sampling switching valve (1) is comprising valve body, valve, flap, drive rotating shaft, gas sampling switching valve (1) is installed on the fixed support (2), it is characterized in that: this driving device for gas sampling switching valve also comprises reducing motor (5), clutch speed is joined shaft coupling (3), reducing motor (5) is installed on the fixed support (2), clutch speed is joined the transmission body (8) of shaft coupling (3) comprising the right side, the sampling switching valve adapter sleeve (6) in left side, sampling switching valve adapter sleeve (6) respectively with gas sampling switching valve (1), transmission body (8) is fixedly connected, have a through hole in the middle of the transmission body (8), have a border transmission body boss (4) on transmission body (8) the intermediate throughholes madial wall, on reducing motor (5) axle reducing motor transmission shaft (7) is installed, reducing motor transmission shaft (7) inserts in transmission body (8) intermediate throughholes in left side, have all ring drive shaft boss on the transmission shaft (7) in transmission body boss (4) left side in transmission body (8) intermediate throughholes, transmission body boss (4) is corresponding with the transmission shaft boss, on the transmission shaft (7) on transmission body boss (4) right side slide (9) is installed in transmission body (8) intermediate throughholes, on the transmission shaft (7) on slide (9) right side sliding gasket (10) is installed, on the transmission shaft (7) on sliding gasket (10) right side wavy spring (11) is installed, the transmission shaft (7) on wavy spring (11) right side is gone up screw thread torsion setting nut (12) is installed.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2008102498798A CN101477088B (en) | 2008-12-29 | 2008-12-29 | Driving device for gas sampling switching valve |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2008102498798A CN101477088B (en) | 2008-12-29 | 2008-12-29 | Driving device for gas sampling switching valve |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN101477088A CN101477088A (en) | 2009-07-08 |
| CN101477088B true CN101477088B (en) | 2011-06-29 |
Family
ID=40837833
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN2008102498798A Expired - Fee Related CN101477088B (en) | 2008-12-29 | 2008-12-29 | Driving device for gas sampling switching valve |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN101477088B (en) |
Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| SU1366939A1 (en) * | 1986-01-02 | 1988-01-15 | Днепропетровский Отдел По Разработке Контрольно-Измерительной Аппаратуры Всесоюзного Научно-Исследовательского Института Горноспасательного Дела | Device for introducing sample into automatic gas chromatograph |
| US5213763A (en) * | 1989-10-10 | 1993-05-25 | Institut Francais Du Petrole | Device and method for transferring a fluid sample between two chambers and application in particular to gas chromatography |
| CN2174605Y (en) * | 1993-10-09 | 1994-08-17 | 北京市北分色谱仪器技术公司 | Plane revoluting multi-purpose switching valve |
| EP1371963A2 (en) * | 2002-06-12 | 2003-12-17 | Maymed Medical Electronics Development GesmbH | Method and apparatus for controlling valves |
| CN2736768Y (en) * | 2004-09-14 | 2005-10-26 | 南京南自科技发展有限公司 | Gas automatic sampling control device for gas analysis |
| CN201335175Y (en) * | 2008-12-29 | 2009-10-28 | 北京京鲁伟业科技发展有限公司滕州分公司 | Gas-sampling changeover valve drive unit |
-
2008
- 2008-12-29 CN CN2008102498798A patent/CN101477088B/en not_active Expired - Fee Related
Patent Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| SU1366939A1 (en) * | 1986-01-02 | 1988-01-15 | Днепропетровский Отдел По Разработке Контрольно-Измерительной Аппаратуры Всесоюзного Научно-Исследовательского Института Горноспасательного Дела | Device for introducing sample into automatic gas chromatograph |
| US5213763A (en) * | 1989-10-10 | 1993-05-25 | Institut Francais Du Petrole | Device and method for transferring a fluid sample between two chambers and application in particular to gas chromatography |
| CN2174605Y (en) * | 1993-10-09 | 1994-08-17 | 北京市北分色谱仪器技术公司 | Plane revoluting multi-purpose switching valve |
| EP1371963A2 (en) * | 2002-06-12 | 2003-12-17 | Maymed Medical Electronics Development GesmbH | Method and apparatus for controlling valves |
| CN2736768Y (en) * | 2004-09-14 | 2005-10-26 | 南京南自科技发展有限公司 | Gas automatic sampling control device for gas analysis |
| CN201335175Y (en) * | 2008-12-29 | 2009-10-28 | 北京京鲁伟业科技发展有限公司滕州分公司 | Gas-sampling changeover valve drive unit |
Non-Patent Citations (6)
| Title |
|---|
| 张延华.一种低成本的气相色谱仪液体自动进样器的设计.《现代科学仪器》.2007,(第3期),49-53. |
| 张西咸 |
| 张西咸;陈莲;李海洋;梁作宇;张延华.一种低成本的气相色谱仪液体自动进样器的设计.《现代科学仪器》.2007,(第3期),49-53. * |
| 李海洋 |
| 梁作宇 |
| 陈莲 |
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| Publication number | Publication date |
|---|---|
| CN101477088A (en) | 2009-07-08 |
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Granted publication date: 20110629 Termination date: 20121229 |