CN205078862U - Chromatogram back pressure valve - Google Patents
Chromatogram back pressure valve Download PDFInfo
- Publication number
- CN205078862U CN205078862U CN201520664875.1U CN201520664875U CN205078862U CN 205078862 U CN205078862 U CN 205078862U CN 201520664875 U CN201520664875 U CN 201520664875U CN 205078862 U CN205078862 U CN 205078862U
- Authority
- CN
- China
- Prior art keywords
- valve body
- valve
- back pressure
- spring
- chromatogram
- 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.)
- Expired - Fee Related
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Abstract
The utility model discloses a chromatogram back pressure valve, including adjusting screw, valve body, level pressure spring, fixed spring seat, metallic diaphragm, sealing washer, assistance valve, air inlet, backpressure spring, gas outlet, its characterized in that: adjusting screw and valve body screwed connection, valve body internal cavity are equipped with the level pressure spring, and the valve body internal cavity is equipped with the backpressure spring, and the valve body side is equipped with the gas outlet, and the opposite side is equipped with the air inlet, and the valve is assisted by air inlet UNICOM, inlay the sealing washer under the metallic diaphragm in the valve body, and level pressure spring lower part is equipped with fixed spring seat, fixed spring seat and metallic diaphragm fixed connection. This chromatogram back pressure valve makes the pre -column pressure oscillation restrict at the 0.01MPa within range according to pre -column pressure dynamic change, adjustment at any time, realizes the effect of high accuracy steady voltage.
Description
Technical field
The utility model relates to gas chromatograph, particularly a kind of chromatogram back pressure valve.
Background technique
At present, chromatogram back pressure valve structure is made up of valve seat, valve body, suction port, air outlet, level pressure spring, adjusting screw rod, nitrile butadiene rubber diaphragm, valve, seal ring etc.During application, back pressure valve suction port connects current stabilizer outlet, back pressure valve air outlet connects vaporizing chamber, when inlet pressure is less than setting pressure, nitrile butadiene rubber diaphragm near throttle, cuts off the path between suction port and air outlet, when inlet pressure is larger than setting pressure under the effect of level pressure spring force, nitrile butadiene rubber diaphragm is under gas pressure effect, away from throttle, be communicated with suction port and air outlet, keep air inlet side constant pressure.When traditional back pressure valve works, just simple one logical one breaks, when the multistage temperature programming of chromatogram is analyzed, before post, pressure range is narrower, and fluctuation is large, produces baseline noise, fluctuation, thus qualitative, the dosing accuracy of impact analysis result, be difficult to meet and analyze requirement, and nitrile butadiene rubber is long-time easily aging, working life is shorter.
Summary of the invention
For above-mentioned the deficiencies in the prior art, the utility model provides a kind of chromatogram back pressure valve, and this chromatogram back pressure valve is according to Pressure behaviour change before post, and before adjustment makes post at any time, pressure surge is limited within the scope of 0.01MPa, realizes the effect of high-precision voltage stabilizing.
The technical solution of the utility model is: a kind of chromatogram back pressure valve, comprise adjusting screw rod, valve body, level pressure spring, fixing spring seat, metal diaphragm, seal ring, auxiliary valve, suction port, back pressure spring, air outlet, it is characterized in that: adjusting screw rod is connected with valve body spiral, valve body inner cavity is provided with level pressure spring, valve body inner cavity is provided with back pressure spring, valve body side is provided with air outlet, opposite side is provided with suction port, the auxiliary valve of suction port UNICOM, seal ring is inlayed under metal diaphragm in valve body, level pressure spring bottom is provided with fixing spring seat, fixing spring seat is fixedly connected with metal diaphragm.
The beneficial effects of the utility model are: value of pressure is convenient, the use tin Qiang copper film sheet life-span is long, the precision of voltage regulation high (particularly column compartment temperature cause fluctuation), eliminate because pressure changes the baseline noise fluctuation produced, improve the accuracy that analysis result is qualitative, quantitative.
Accompanying drawing explanation
Fig. 1 is a kind of chromatogram back pressure valve of the utility model detonation configuration schematic diagram
A kind of chromatogram back pressure valve of this utility model of Fig. 2 package assembly schematic diagram
Accompanying drawing indicates: 1, adjusting screw rod; 2, valve body; 3, level pressure spring; 4, fixing spring seat; 5, metal diaphragm; 6, seal ring; 7, auxiliary valve; 8, suction port; 9, back pressure spring; 10, air outlet.
Embodiment
Below in conjunction with accompanying drawing, the utility model is described in further detail:
As Fig. 1, shown in Fig. 2, a kind of chromatogram back pressure valve of the utility model, comprise adjusting screw rod 1, valve body 2, level pressure spring 3, fixing spring seat 4, metal diaphragm 5, seal ring 6, auxiliary valve 7, suction port 8, back pressure spring 9, air outlet 10, it is characterized in that: adjusting screw rod 1 is connected with valve body 2 spiral, valve body 2 inner cavity is provided with level pressure spring 3, valve body 2 inner cavity is provided with back pressure spring 9, valve body 2 side is provided with air outlet 10, opposite side is provided with suction port 8, the auxiliary valve of suction port 8 UNICOM, in valve body 2, metal diaphragm inlays seal ring 65 times, level pressure spring 3 bottom is provided with fixing spring seat 4, fixing spring seat 4 is fixedly connected with metal diaphragm 5.
Claims (1)
1. a chromatogram back pressure valve, comprise adjusting screw rod, valve body, level pressure spring, fixing spring seat, metal diaphragm, seal ring, auxiliary valve, suction port, back pressure spring, air outlet, it is characterized in that: adjusting screw rod is connected with valve body spiral, valve body inner cavity is provided with level pressure spring, valve body inner cavity is provided with back pressure spring, valve body side is provided with air outlet, opposite side is provided with suction port, the auxiliary valve of suction port UNICOM, seal ring is inlayed under metal diaphragm in valve body, level pressure spring bottom is provided with fixing spring seat, and fixing spring seat is fixedly connected with metal diaphragm.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201520664875.1U CN205078862U (en) | 2015-08-31 | 2015-08-31 | Chromatogram back pressure valve |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201520664875.1U CN205078862U (en) | 2015-08-31 | 2015-08-31 | Chromatogram back pressure valve |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN205078862U true CN205078862U (en) | 2016-03-09 |
Family
ID=55431272
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201520664875.1U Expired - Fee Related CN205078862U (en) | 2015-08-31 | 2015-08-31 | Chromatogram back pressure valve |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN205078862U (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105972422A (en) * | 2016-06-30 | 2016-09-28 | 殷霄 | Spring type single-face film oil saving mechanism |
| CN107061843A (en) * | 2017-03-31 | 2017-08-18 | 江苏汉邦科技有限公司 | A kind of automatic counterbalance valve applied to supercritical fluid chromatography system |
-
2015
- 2015-08-31 CN CN201520664875.1U patent/CN205078862U/en not_active Expired - Fee Related
Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105972422A (en) * | 2016-06-30 | 2016-09-28 | 殷霄 | Spring type single-face film oil saving mechanism |
| CN107061843A (en) * | 2017-03-31 | 2017-08-18 | 江苏汉邦科技有限公司 | A kind of automatic counterbalance valve applied to supercritical fluid chromatography system |
| WO2018176736A1 (en) * | 2017-03-31 | 2018-10-04 | 江苏汉邦科技有限公司 | Automatic back-pressure valve for use in supercritical fluid chromatographic system |
| KR20190107661A (en) * | 2017-03-31 | 2019-09-20 | 지앙수 한본 사이언스 & 테크놀로지 컴퍼니 리미티드 | Automatic Back Pressure Valve for Supersonic Fluid Chromatography Systems |
| CN107061843B (en) * | 2017-03-31 | 2019-12-03 | 江苏汉邦科技有限公司 | A kind of automatic counterbalance valve applied to supercritical fluid chromatography system |
| KR102208455B1 (en) | 2017-03-31 | 2021-01-27 | 지앙수 한본 사이언스 & 테크놀로지 컴퍼니 리미티드 | Automatic back pressure valve for superonic fluid chromatography systems |
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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 |
Granted publication date: 20160309 Termination date: 20180831 |
|
| CF01 | Termination of patent right due to non-payment of annual fee |