CN207717719U - A kind of gas chromatograph air inlet stable-pressure device - Google Patents
A kind of gas chromatograph air inlet stable-pressure device Download PDFInfo
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- CN207717719U CN207717719U CN201721650594.6U CN201721650594U CN207717719U CN 207717719 U CN207717719 U CN 207717719U CN 201721650594 U CN201721650594 U CN 201721650594U CN 207717719 U CN207717719 U CN 207717719U
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- air inlet
- voltage stabilizing
- pumping source
- stabilizing part
- gas chromatograph
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Abstract
The utility model discloses a kind of gas chromatograph air inlet stable-pressure device, is related to gas chromatograph techniques field.The device includes air inlet branch road, pumping source and multiple-way valve, and the air inlet branch road is connect with pumping source entrance, and voltage stabilizing part is provided between pumping source and multiple-way valve.The apparatus structure is simple, and reliability is high, easy for installation, reduces the manufacturing cost of equipment.
Description
Technical field
The utility model is related to gas chromatograph techniques field more particularly to a kind of gas chromatograph air inlet stable-pressure devices.
Background technology
With China《Soil Pollution Control action plan》Publication, for there are volatility or semi-volatile organic matters
(VOCs/SVOCs) plot polluted, monitor the VOCs/SVOCs groups that remain in soil matrix structure be divided into site investigation,
The important link of assessment, reparation and long term monitoring.The characteristics of for VOCs/SVOCs, usually sample portable gas chromatography or and
Other detection means are combined (chromatograph-mass spectrometer coupling), generally use solenoid valve block, or coordinate air pulsing using triple valve
Valve, or eight ways valve is used, to realize the switching of air inlet gas circuit, complete machine gas circuit bulky, weight is big, carries not side
Just.
The gas of the inlet end of gas chromatograph has certain pressure pulse situation, while multiple-way valve is in handoff procedure
Certain influence can be generated to gas pressure, therefore usually requires setting stable-pressure device, with stabilizing gas pressure so that enter more
The stream pressure of port valve is more stablized.Air-flow into multiple-way valve enters in system, is analyzed by adsorbing analytic tube, because
This, the air-flow of multiple-way valve is more stable, and the analyzing efficiency of gas chromatograph is higher, and parsing effect is better.
In the prior art, setting pressure maintaining valve generally is exported using in pumping source, it improves the cost of equipment, devices
Reliability depend on pressure maintaining valve spring rate, the response speed of voltage stabilizing is relatively low, and the flow of gas is more difficult to control.
Utility model content
In view of the above-mentioned problems, the utility model proposes a kind of gas chromatograph air inlet stable-pressure device, simple in structure, reliability
Height, it is easy for installation, reduce the manufacturing cost of equipment.
The utility model proposes a kind of gas chromatograph air inlet stable-pressure devices, including：Air inlet branch road, pumping source and multiple-way valve,
Air inlet branch road is connect with pumping source entrance, voltage stabilizing part is provided between pumping source and multiple-way valve, between pumping source outlet and voltage stabilizing part import
It is provided with the first solenoid valve, the outlet of voltage stabilizing part is provided with pressure sensor.
As a kind of preferred embodiment of the utility model, the first electromagnetism is provided between pumping source outlet and voltage stabilizing part import
Valve, the outlet of voltage stabilizing part are provided with pressure sensor.
As a kind of preferred embodiment of the utility model, pressure sensor is for detecting voltage stabilizing part outlet pressures, and root
The opening and closing of the first solenoid valve is controlled according to voltage stabilizing part outlet pressures.
As a kind of preferred embodiment of the utility model, the second electromagnetism is provided between the outlet of voltage stabilizing part and multiple-way valve entrance
Valve.
As a kind of preferred embodiment of the utility model, third solenoid valve is additionally provided between pumping source outlet and multiple-way valve
As a kind of preferred embodiment of the utility model, voltage stabilizing part is caching bottle.
As a kind of preferred embodiment of the utility model, filter is additionally provided between air inlet branch road and pumping source.
As a kind of preferred embodiment of the utility model, it is additionally provided with except water pipe between pumping source and filter.
The beneficial effects of the utility model are：
(1) chromatograph air inlet stable-pressure device provided by the utility model realizes air inlet gas circuit by the way that voltage stabilizing part is arranged
Pressure stabilization function improves the stability of air inlet, simple in structure, and reliability is high, easy for installation, reduces the manufacturing cost of equipment.
(2) gas chromatograph air inlet stable-pressure device provided by the utility model, by pumping source outlet and second solenoid valve
Between be provided with third solenoid valve so that device can be directly rinsed by the gas of pumping source in gas circuit flushing operation, expand
The use scope of device is opened up.
Description of the drawings
Fig. 1 is the structural schematic diagram of chromatograph air inlet stable-pressure device provided by the utility model.
In figure：1, air inlet branch road；2, pumping source；3, multiple-way valve；4, voltage stabilizing part；5, the first solenoid valve；6, pressure sensor；7、
Second solenoid valve；8, third solenoid valve；9, filter；10, water pipe is removed.
Specific implementation mode
The utility model is described in further detail with reference to the accompanying drawings and examples.It is understood that herein
Described specific embodiment is used only for explaining the utility model, rather than the restriction to the utility model.It further needs exist for
It is bright, it illustrates only for ease of description, in attached drawing and the relevant part of the utility model rather than entire infrastructure.
The structural schematic diagram that chromatograph air inlet stable-pressure device is provided for the utility model as shown in Figure 1, mainly by air inlet branch
8 groups of road 1, pumping source 2, multiple-way valve 3, voltage stabilizing part 4, the first solenoid valve 5, pressure sensor 6, second solenoid valve 7 and third solenoid valve
At.Wherein, air inlet branch road 1 is air source, provides under test gas for multiple-way valve 3, exists in handoff procedure with multiple-way valve 3 at air source
Certain pressure fluctuation.
Air inlet branch road 1 is connect with 2 entrance of pumping source, and air inlet branch road 1 also sets up with filter 9 with pumping source 2 and removes water pipe 10, is used
In carrying out preliminary filtering and water removal to gas.Voltage stabilizing part 4 is provided between pumping source 2 and multiple-way valve 3, voltage stabilizing part 4 is usually slow
Bottle structure is deposited, caching bottle is cheap, simple in structure, and reliability is high.Pumping source 2 is exported is provided with the between 4 import of voltage stabilizing part
One solenoid valve 5, the outlet of voltage stabilizing part 4 are provided with pressure sensor 6, second are provided between the outlet of voltage stabilizing part 4 and 3 entrance of multiple-way valve
Solenoid valve 7.Pressure sensor 6 controls first for detecting 4 outlet pressures of voltage stabilizing part, and according to 4 outlet pressures of voltage stabilizing part
The opening and closing of solenoid valve 5.Pumping source 2 is exported is additionally provided with third solenoid valve 8 between multiple-way valve 3.
It is in actual mechanical process：
(1) preparation stage
Pumping source 2 starts, and the first solenoid valve 5 is opened, and second solenoid valve 7 and third solenoid valve 8 are closed, and pumping source 2 is by air inlet branch
Gas in road 1 is squeezed into voltage stabilizing part 4.As gas is constantly squeezed into voltage stabilizing part 4, the pressure in voltage stabilizing part 4 constantly increases, and
Pressure is detected by pressure sensor 6.When pressure sensor 6 detects that the pressure in voltage stabilizing part 4 reaches setting value, control first
Solenoid valve 5 is closed, and the Plenum Process of voltage stabilizing part 4 is completed.Preparation stage terminates.
(2) service stage
Pumping source 2 starts, and the first solenoid valve 5 and second solenoid valve 7 are opened, and third solenoid valve 8 is closed, and pumping source 2 is by air inlet branch
Gas in road 1 is squeezed into voltage stabilizing part 4.Gas in voltage stabilizing part 4 is supplied by second solenoid valve 7 into multiple-way valve 3.
Since voltage stabilizing part 4 has carried out the operation of pressurising, pressure is more constant, therefore, is supplied from voltage stabilizing part 4 into multiple-way valve 3
The air pressure of gas is more constant.Gas in air source is continuously squeezed into voltage stabilizing part 4 and is supplemented by pumping source 2 again, therefore can
To ensure that the gas in voltage stabilizing part 4 is supplemented, flow and pressure are relatively stable.Since voltage stabilizing part 4 is a large volume
Component, the air pulse in air inlet branch road 1 enter volume in voltage stabilizing part 4 and expand, and produce the effect of certain voltage stabilizing.
When pressure sensor 6 detects that the pressure in voltage stabilizing part 4 is higher, pressure sensor 6 can control the first solenoid valve 5
And pumping source 2 is closed, only the gas of voltage stabilizing part 4 supplies multiple-way valve 3, and the air pressure of voltage stabilizing part 4 is lowered；When pressure sensor 6
After detecting that the pressure in voltage stabilizing part 4 reaches setting value, pressure sensor 6 can control the first solenoid valve 5 and pumping source 2 is opened,
Pumping source 2 again supplements voltage stabilizing part 4 so that the pressure of 3 air inlet of multiple-way valve remains stable.
(3) gas circuit rinse stage
When system needs to carry out the flushing operation of gas circuit, it is no longer necessary to carry out voltage stabilizing to 3 air inlet of multiple-way valve.At this point,
Pumping source 2 starts, and third solenoid valve 8 is opened, and the first solenoid valve 5 and second solenoid valve 7 are closed, and pumping source 2 is without voltage stabilizing part 4, directly
The flushing operation that the gas in air inlet branch road 1 is squeezed into multiple-way valve 3 to the system that carries out is connect, gas circuit is simpler, also more rationally, expands
The use scope of device is opened up.
The utility model proposes technical solution structure it is relatively simple, it is easy for installation, not only solve air inlet stability
Problem, while keeping the manufacturing cost of equipment lower.
Note that above are only the preferred embodiment and institute's application technology principle of the utility model.Those skilled in the art's meeting
Understand, the utility model is not limited to specific embodiment here, can carry out for a person skilled in the art various apparent
Change, readjust and substitutes without departing from the scope of protection of the utility model.Therefore, although by above example to this
Utility model is described in further detail, but the utility model is not limited only to above example, is not departing from this reality
Can also include other more equivalent embodiments in the case of with novel design, and the scope of the utility model is by appended power
Sharp claimed range determines.
Claims (8)
1. a kind of gas chromatograph air inlet stable-pressure device, including：Air inlet branch road (1), pumping source (2) and multiple-way valve (3), the air inlet
Branch (1) is connect with the pumping source (2) entrance, which is characterized in that is provided between the pumping source (2) and the multiple-way valve (3)
Voltage stabilizing part (4).
2. gas chromatograph air inlet stable-pressure device according to claim 1, which is characterized in that the pumping source (2) outlet with
The first solenoid valve (5) is provided between voltage stabilizing part (4) import, voltage stabilizing part (4) outlet is provided with pressure sensor
(6)。
3. gas chromatograph air inlet stable-pressure device according to claim 2, which is characterized in that the pressure sensor (6)
First electromagnetism is controlled for detecting voltage stabilizing part (4) outlet pressures, and according to voltage stabilizing part (4) outlet pressures
The opening and closing of valve (5).
4. gas chromatograph air inlet stable-pressure device according to claim 1, which is characterized in that voltage stabilizing part (4) outlet
It is provided with second solenoid valve (7) between the multiple-way valve (3) entrance.
5. gas chromatograph air inlet stable-pressure device according to claim 4, which is characterized in that the pumping source (2) outlet with
Third solenoid valve (8) is additionally provided between multiple-way valve (3).
6. gas chromatograph air inlet stable-pressure device according to claim 1, which is characterized in that the voltage stabilizing part (4) is slow
Deposit bottle.
7. gas chromatograph air inlet stable-pressure device according to claim 1, which is characterized in that the air inlet branch road (1) and
It is additionally provided with filter (9) between the pumping source (2).
8. gas chromatograph air inlet stable-pressure device according to claim 1, which is characterized in that the pumping source (2) and filtering
It is additionally provided between device (9) except water pipe (10).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201721650594.6U CN207717719U (en) | 2017-11-30 | 2017-11-30 | A kind of gas chromatograph air inlet stable-pressure device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201721650594.6U CN207717719U (en) | 2017-11-30 | 2017-11-30 | A kind of gas chromatograph air inlet stable-pressure device |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN207717719U true CN207717719U (en) | 2018-08-10 |
Family
ID=63057970
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201721650594.6U Active CN207717719U (en) | 2017-11-30 | 2017-11-30 | A kind of gas chromatograph air inlet stable-pressure device |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN207717719U (en) |
-
2017
- 2017-11-30 CN CN201721650594.6U patent/CN207717719U/en active Active
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| GR01 | Patent grant | ||
| GR01 | Patent grant | ||
| TR01 | Transfer of patent right | ||
| TR01 | Transfer of patent right |
Effective date of registration: 20191220 Address after: 100083 Jing Shu Yuan Road, Haidian District, Haidian District, Beijing, No. 102 Co-patentee after: Shenzhen Nanke big asset management limited company Patentee after: Beijing Peng Yu Chang Ya Environmental Protection Technology Co., Ltd. Address before: 100083 Jing Shu Yuan Road, Haidian District, Haidian District, Beijing, No. 102 Co-patentee before: BEIJING NANKEDA BLUE TECHNOLOGY CO., LTD. Patentee before: Beijing Peng Yu Chang Ya Environmental Protection Technology Co., Ltd. |