CN201662566U - Tubular differential pressure flow air resistor device - Google Patents
Tubular differential pressure flow air resistor device Download PDFInfo
- Publication number
- CN201662566U CN201662566U CN2010201326960U CN201020132696U CN201662566U CN 201662566 U CN201662566 U CN 201662566U CN 2010201326960 U CN2010201326960 U CN 2010201326960U CN 201020132696 U CN201020132696 U CN 201020132696U CN 201662566 U CN201662566 U CN 201662566U
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- flow
- air
- differential pressure
- vapour lock
- lock pipe
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Abstract
The utility model discloses a tubular differential pressure flow air resistor device. One end of an air resisting tube is provided with an air inlet while the other end is provided with an air outlet. The tubular differential pressure flow air resistor device is characterized in that the air resisting tube is a straight tube, a pressure detecting mechanism used for detecting air flow different pressure gradients of the same level in the direction of an air resisting tube flowing passage is arranged outside the air resisting tube and provided with two pressure sensor probes, the pressure sensor probes extend into the air resisting tube flowing passage and are located at the same level in the flowing passage, and the pressure detecting mechanism outputs detected differential pressure gradient values through a data line. Through detecting the air flow differential pressure gradients in the flowing passage, fluid is applied under a laminar flow state. As the flow of the fluid in the tube is in direction proportion to the differential pressure gradients, the differential pressure gradients at the same level in the flowing passage can be detected via the pressure detecting mechanism only, and flow value of the fluid can be indirectly obtained by accurately measuring differential pressure. The tubular differential pressure flow air resistor device is simple in flow measurement, accurate in data and favorable for increasing accuracy of detection of a chromatograph.
Description
Technical field
The utility model relates to a kind of flow control component, is a kind of tubular type differential flow gas resistance device specifically, the particularly a kind of carrier gas of gas chromatograph or tubular type differential flow gas resistance device that auxilliary airshed detects of being used for.
Background technology
At present, the carrier gas that gas chromatograph is used to monitor in the conventional art or the discharge characteristic of auxilliary gas all are to adopt needle valve mostly, though needle valve has easy to adjust, the advantage of flexible operation, but if in the carrier gas of using gas chromatograph or the flow detection of auxilliary gas, during monitoring, it is big that it but exists volume, the control circuit that needs to set in chromatograph is than complicated shortcoming, and, in the chromatograph use, the needle valve of Control Flow is continuous adjustable system, so the not repeated defects that can repeatedly adjust unavoidably in actual applications, thereby influence chromatographic detection accuracy.
Given this, in the improvement technology, people have used pitot tube, Venturi tube, orifice flowmeter to detect the flow of carrier gas, this pitot tube, Venturi tube, orifice flowmeter design according to Bernoulli equation, based on square being directly proportional of the differential pressure of detection piece and pipeline inner fluid volumetric flow rate, accompanying drawing 1 is the schematic diagram of Venturi tube measuring and calculating flow velocity, it is according to above-mentioned principle, by detecting inlet end pressure P 1 ' can extrapolate flow Q ' in the runner with the draught head Δ P ' of middle trunnion P2 '.In the course of conveying of chromatograph carrier gas, gas generally is to be laminar condition in runner, and above-mentioned pressure reduction mainly is to use with square proportional relation that is become of flow and uses under the disturbed flow condition of fluid, in the calculation of complex that will cause carrier gas flux, Data Detection is accurate inadequately, and then influences chromatographic accuracy of detection.
Summary of the invention
The purpose of this utility model is to overcome the deficiencies in the prior art, provides a kind of air-flow to calculate simple, the accurate tubular type differential flow of Data Detection gas resistance device, helps improving the accuracy that chromatograph detects.
Goal of the invention of the present utility model is achieved in that a kind of tubular type differential flow gas resistance device, comprise the vapour lock pipe that is used for water conservancy diversion gas, one end of vapour lock pipe is an air intake opening, the other end is the gas outlet, it is characterized in that: described vapour lock pipe is a straight tube, vapour lock pipe peripheral hardware is useful on the inspection press mechanism of the air-flow differential pressure gradient that detects the same level height of vapour lock pipe runner direction, two pressure sensing probes are housed on the inspection press mechanism, the pressure sensing probe extend into the runner of vapour lock pipe and is positioned at the same level height of runner, and the inspection press mechanism is exported detected differential pressure gradients value by data line.By detecting the air-flow differential gradient in the runner, applicating fluid is directly proportional with the differential pressure gradient based on the tube fluid flow under laminar condition, can obtain the flow value of fluid indirectly by the accurate measurement of differential pressure, and flow measuring is simple, data are accurate.
In improvement of the technical scheme, the described vapour lock pipe outside is provided with and is used for fixing the shell that the inspection press mechanism is installed, gas is subjected to the influence of external environment condition (comprising temperature, humidity etc.) and causes the air pressure change of gas in can effectively avoiding managing, and simultaneously, is beneficial to the fixed installation of inspection press mechanism.
For further improvement in the technical proposal, the runner in the described vapour lock pipe is the pipe runner, more can be beneficial to gas cambium layer stream mode in runner.
To in further the improving of technique scheme, described inspection press mechanism is arranged on the sidewall of vapour lock pipe, is beneficial to the installation of inspection press mechanism and to the pressure detection of air-flow.
The flow detector of the carrier gas that gas chromatograph is used to monitor in the utility model and the prior art or the discharge characteristic of auxilliary gas is compared, and has the following advantages:
The utility model adopts tubular type differential flow gas resistance device to detect the discharge characteristic of carrier gas in the gas chromatograph or auxilliary gas, only need to detect the differential pressure gradients of same level height in the runner by the inspection press mechanism, be directly proportional with the differential pressure gradient based on the tube fluid flow, can obtain the flow value of fluid indirectly by the accurate measurement of differential pressure, flow measuring is simple, data are accurate, helps improving the accuracy that chromatograph detects.
Description of drawings
Accompanying drawing 2 is the structure principle chart of the utility model embodiment.
Accompanying drawing 3 is the structure outside drawing of the utility model embodiment.
Accompanying drawing 4 is the structural drawing of cutting open of the utility model most preferred embodiment.
Embodiment
The utility model will be further described below in conjunction with accompanying drawing.
Extremely shown in Figure 4 according to Fig. 2, tubular type differential flow gas resistance device described in the utility model, comprise the vapour lock pipe 1 that is used for water conservancy diversion gas, carrier gas or auxilliary airshed that it is mainly used in gas chromatograph detect, this device comprises the vapour lock pipe 1 that is used for water conservancy diversion gas, vapour lock pipe 1 generally need with airtight and heat-insulating capability preferably pipe make, it is to be main with elongated tubular mostly that this kind is used for pipe that gas chromatograph detects carrier gas or auxilliary gas, carrier gas or auxilliary gas are laminar condition in vapour lock pipe 1.One end of vapour lock pipe 1 is an air intake opening 11, and the source of the gas of air intake opening 11 communication with carrier gas or auxilliary gas, the other end are gas outlet 12, and carrier gas or auxilliary gas are exported in the stratographic analysis mechanism that has entered with the detected gas mixing in the chromatograph from gas outlet 12.The utility model improves the differential pressure type flow detector of prior art, described vapour lock pipe 1 is designed to straight tube, vapour lock pipe 1 peripheral hardware is useful on the inspection press mechanism 2 of the air-flow differential pressure gradient that detects the same level height of vapour lock pipe 1 runner direction, two pressure sensing probes 21 are housed on the inspection press mechanism 2, pressure sensing probe 21 extend into the runner of vapour lock pipe 1 and is positioned at the same level height of runner, inspection press mechanism 2 is exported detected differential pressure gradients value by data line 3, by detecting the air-flow differential gradient in the runner, applicating fluid is under laminar condition, be directly proportional with the differential pressure gradient based on the tube fluid flow, be to be to form linear relationship between the variation of differential pressure gradients and the flow, can obtain the flow value of fluid indirectly by the accurate measurement of differential pressure, flow measuring is simple, data are accurate.
Two pressure sensing probes 21 when being provided with in the inspection press mechanism 2 described in the utility model during this time; for making flow detection more accurate; the quantity of probe should be provided with a plurality of; detect the flow number of many places; can obtain accurate flow number by Mathematical Method; this should be that equivalence of the present utility model is derived; should belong to protection domain of the present utility model; in the actual design manufacture process; based at air-flow under laminar condition; differential pressure gradients and flow are proportional, get final product so two pressure sensing probes 21 can at least only need be set.Simultaneously, the above-mentioned inspection press mechanism 2 that is used to detect the air-flow differential pressure gradient of the same level height of vapour lock pipe 1 runner direction can directly adopt differential manometer.
In improvement of the technical scheme, described vapour lock pipe 1 outside is provided with and is used for fixing the shell 4 that inspection press mechanism 2 is installed, gas is subjected to the influence of external environment condition (comprising temperature, appropriateness etc.) and causes the air pressure change of gas in can effectively avoiding managing, and simultaneously, is beneficial to the fixed installation of inspection press mechanism 2.Simultaneously, the runner in the described vapour lock pipe 1 is the pipe runner, more can be beneficial to gas cambium layer stream mode in runner; And described inspection press mechanism 2 is arranged on the sidewall of vapour lock pipe 1, is beneficial to the installation of inspection press mechanism 2 and to the pressure detection of air-flow, the diagram of said structure sees Fig. 3 and shown in Figure 4 for details.
So far, the utility model adopts tubular type differential flow gas resistance device to detect the discharge characteristic of carrier gas in the gas chromatograph or auxilliary gas, only need to detect the differential pressure gradients of same level height in the runner by inspection press mechanism 2, can accurately measure the flow value that can obtain fluid indirectly, flow measuring is simple, data are accurate, help improving the accuracy that chromatograph detects, effectively reduce carrier gas or auxilliary airshed manufacturing cost side mechanism.
Claims (4)
1. tubular type differential flow gas resistance device, comprise the vapour lock pipe (1) that is used for water conservancy diversion gas, one end of vapour lock pipe (1) is air intake opening (11), the other end is gas outlet (12), it is characterized in that: described vapour lock pipe (1) is a straight tube, vapour lock pipe (1) peripheral hardware is useful on the inspection press mechanism (2) of the air-flow differential pressure gradient that detects the same level height of vapour lock pipe (1) runner direction, two pressure sensing probes (21) are housed on the inspection press mechanism (2), pressure sensing probe (21) extend into the runner of vapour lock pipe (1) and is positioned at the same level height of runner, and inspection press mechanism (2) is exported detected differential pressure gradients value by data line (3).
2. tubular type differential flow gas resistance device according to claim 1 is characterized in that: described vapour lock pipe (1) outside is provided with and is used for fixing the shell (4) that inspection press mechanism (2) is installed.
3. tubular type differential flow gas resistance device according to claim 2 is characterized in that: the runner in the described vapour lock pipe (1) is the pipe runner.
4. tubular type differential flow gas resistance device according to claim 3 is characterized in that: described inspection press mechanism (2) is arranged on the sidewall of vapour lock pipe (1).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2010201326960U CN201662566U (en) | 2010-03-16 | 2010-03-16 | Tubular differential pressure flow air resistor device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2010201326960U CN201662566U (en) | 2010-03-16 | 2010-03-16 | Tubular differential pressure flow air resistor device |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN201662566U true CN201662566U (en) | 2010-12-01 |
Family
ID=43232986
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN2010201326960U Expired - Fee Related CN201662566U (en) | 2010-03-16 | 2010-03-16 | Tubular differential pressure flow air resistor device |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN201662566U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113504331A (en) * | 2021-07-01 | 2021-10-15 | 安徽色谱仪器有限公司 | Pressure flow control device and gas chromatograph thereof |
-
2010
- 2010-03-16 CN CN2010201326960U patent/CN201662566U/en not_active Expired - Fee Related
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113504331A (en) * | 2021-07-01 | 2021-10-15 | 安徽色谱仪器有限公司 | Pressure flow control device and gas chromatograph thereof |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| C17 | Cessation of patent right | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20101201 Termination date: 20140316 |