CN204064740U - Pressure stability sampling apparatus - Google Patents
Pressure stability sampling apparatus Download PDFInfo
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- CN204064740U CN204064740U CN201420429089.9U CN201420429089U CN204064740U CN 204064740 U CN204064740 U CN 204064740U CN 201420429089 U CN201420429089 U CN 201420429089U CN 204064740 U CN204064740 U CN 204064740U
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- pressure stability
- pressure
- gas
- gauge
- sampling apparatus
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Abstract
Pressure stability sampling apparatus of the present utility model, comprise sampling pipe, pressure stability chamber, control system and gas-monitoring instrument, sampling pipe is communicated in the air intake opening in pressure stability chamber, pressure stability Qiang mono-tunnel connects multi-limbed tube, every arm is communicated in gas-monitoring instrument, the inlet end of sampling pipe is provided with first-class gauge and restrictor successively, pressure stability chamber is connected with vacuum pump by breather line, breather line is installed second gauge and ratio adjusting valve, pressure stability sampling apparatus of the present utility model can make sample introduction pressure remain a definite value, guarantee sample introduction repeatability, instrument internal pressure can be adjusted by pressure stability chamber and regulation device, instrument internal pressure is made to remain a definite value, aerial survey flying height environment must its when lower than this value, do not need to demarcate it, thus realize aircraft because of Level Change and bring pressure to change the uncertainty caused, the data accuracy of gas-monitoring instrument during raising aerial survey.
Description
Technical field
The utility model relate to a kind of voltage stabilizing sampling apparatus, particularly a kind of for voltage stabilizing sampling apparatus during aerial survey.
Background technology
In aerial survey, usual operation analysis instrument carries out gas-monitoring to the concentration of gaseous sample, in order to can the concentration of accurate analysis and measurement gas, must ensure that sample introduction process has good repeatability (namely multiple repairing weld gas-monitoring result repeats degree), and steady pressure during sample introduction is the essential condition guaranteeing sample introduction repeatability, but in aerial survey, due to the change of flying height, the real-time change of ambient pressure brings difficulty to control sample introduction pressure.
The existing atmospheric ambient gas monitoring instrument for ground, can be placed in a specific environment and (generally be set as 0.6 atmospheric pressure time on the ground), thus ensures that instrument internal pressure is constant all the time, solves the stable problem of demarcation.But when aerial survey, during along with transporter height change, apply existing atmospheric ambient gas monitoring instrument and also can there is following problem:
1, during aerial survey, the pressure of sampling pipe air inlet changes with transporter height change, the real-time change of ambient pressure brings difficulty to control sample introduction pressure, thus cause sample introduction poor repeatability, error can be brought to samples measurements like this, thus affect gas-monitoring precision;
2, atmospheric ambient gas monitoring instrument needs to carry out gas-monitoring under a stable air pressure environment, and when instrument pressure comes and go, interior scalar quantity cannot be determined, affects gas-monitoring precision.
Summary of the invention
The goal of the invention of the application is to solve current atmospheric ambient gas monitoring instrument for sample introduction pressure transient during aerial survey, and instrument pressure changes greatly, the technical matters that cannot demarcate, and provides a kind of pressure stability sampling apparatus.
In order to complete the goal of the invention of the application, the application by the following technical solutions:
Pressure stability sampling apparatus of the present utility model, comprise sampling pipe, pressure stability chamber and gas monitoring instrument, described sampling pipe is communicated in the air intake opening in described pressure stability chamber, the escape pipe in described pressure stability chamber is communicated in described gas-monitoring instrument, the inlet end of described sampling pipe is provided with first-class gauge and restrictor successively, described pressure stability chamber also has the port connecting regulation device, described regulation device comprises second gauge, ratio adjusting valve, vacuum pump and PC, described pressure stability chamber is connected with described vacuum pump by breather line, described breather line is installed described second gauge and described ratio adjusting valve, described PC respectively with described first-class gauge, second gauge, ratio adjusting valve, restrictor is connected with vacuum pump.
Restrictor described in the utility model is ratio adjusting valve, and described ratio adjusting valve is connected with described PC.
The escape pipe of gas-monitoring instrument described in the utility model is communicated in described vacuum pump, is provided with the 3rd flowmeter and variable valve between described gas-monitoring instrument and vacuum pump, and described 3rd flowmeter is connected with described PC respectively with variable valve.
Between first-class gauge described in the utility model and restrictor, thermometer, hygrometer are also installed, described pressure stability chamber is also connected with flowmeter, hygrometer and thermometer.
Second gauge described in the utility model and ratio adjusting valve available quality flow controller are replaced.
PC described in the utility model is also connected with alarm.
Restrictor described in the utility model also can be metering hole or mass flow controller, and described mass flow controller is connected with described PC.
Pressure stability sampling apparatus of the present utility model, sample introduction pressure can be made to remain a definite value by restrictor, guarantee sample introduction repeatability, instrument internal pressure can be adjusted by pressure stability chamber and control system, instrument internal pressure is made to remain a definite value, thus realizing stable calibration value, during such aerial survey, the precision of gas-monitoring can improve greatly.
In addition, the escape pipe of gas-monitoring instrument is communicated in vacuum pump, the flow of gas-monitoring instrument discharge can be controlled by vacuum pump, control gas-monitoring instrument air pressure inside, pressure stability sampling apparatus many places are provided with flowmeter, hygrometer and thermometer simultaneously, the effect of Real-Time Monitoring air pressure inside can be played, then the result recorded is sent to PC, control air pressure inside in real time by PC.
Accompanying drawing explanation
Fig. 1 is the overall schematic of pressure stability sampling apparatus of the present utility model.
Embodiment
As shown in Figure 1, the pressure stability sampling apparatus of the present embodiment, comprise sampling pipe 1, pressure stability chamber 2 and gas monitoring instrument 3, sampling pipe 1 is communicated in the air intake opening in pressure stability chamber 2, the escape pipe in pressure stability chamber 2 is communicated in gas-monitoring instrument 3 by multi-limbed tube, each take-off pipe is communicated with a certain gas-monitoring instrument 3, the inlet end of sampling pipe 1 is provided with first-class gauge 4 and restrictor 5 successively, pressure stability chamber 2 also has the port connecting regulation device 6, regulation device 6 comprises second gauge 7, ratio adjusting valve 8, vacuum pump 9 and PC 10, pressure stability chamber 2 is connected with described vacuum pump 9 by breather line, breather line is installed second gauge 7 and ratio adjusting valve 8, PC 10 respectively with first-class gauge 4, second gauge 7, ratio adjusting valve 8 is connected with vacuum pump 9, the escape pipe of gas-monitoring instrument 3 is communicated in vacuum pump 9, the 3rd flowmeter 11 and variable valve 12 is provided with between gas-monitoring instrument 3 and vacuum pump 9, described 3rd flowmeter 11 is connected with described PC 10 respectively with variable valve 12.
Restrictor 5 in the present embodiment can be metering hole or mass flow controller, restrictor 5 is connected with PC 10, between first-class gauge 4 and restrictor 5, thermometer, hygrometer are also installed, pressure stability chamber 2 is also connected with flowmeter, hygrometer and thermometer.
PC 10 described in the utility model is also connected with alarm, and when the pressure that second gauge 7 records obviously is greater than the numerical value of first-class gauge 4, PC 10 can start alarm, and watchful staff overhauls gas-monitoring sampling apparatus.
The second gauge 7 of the present embodiment and ratio adjusting valve 8 available quality flow controller are replaced.
The using method of above-mentioned pressure stability sampling apparatus is: when carrying out aerial survey, by the air inlet of sampling pipe just to air-flow, along with the operation of transporter, injection port wind speed increases, air flow rate increases, the pressure at restrictor 5 place improves constantly, but when wind speed is brought up to a certain degree, the pressure at restrictor 5 place can stop rising and being in a definite value, such sample introduction pressure remains unchanged, pressure stability chamber can be entered after air-flow is by restrictor 5, impact on gas-monitoring instrument gas-monitoring precision when can reduce the change of sample introduction pressure by pressure stability chamber 2, ensure that sample introduction repeatability, improve gas-monitoring precision.In addition, can adjust sampling apparatus internal pressure by regulation device, concrete grammar is as follows:
Before transporter runs, atmospheric ambient gas monitoring instrument air pressure inside is set as calibration value, generally be set as 0.6 atmospheric pressure, when transporter runs, along with transporter raises, sampling pipe 1 injection port wind speed increases, air flow rate increases, the pressure at restrictor place improves constantly, but when wind speed is brought up to a certain degree, according to venturi theorem, the pressure at restrictor 5 place can stop rising and being in a definite value, simultaneously, the first-class gauge 4 at sampling pipe injection port place, thermometer and hygrometer, second gauge 7, 3rd flowmeter 11, flowmeter on pressure stability chamber 2, the numerical value recorded is transferred to PC 10 by hygrometer and thermometer constantly, PC 10 is according to Numerical Control vacuum pump 9 pressure release recorded, control restrictor 5 and control injection port pressure, make the pressure of sampling apparatus inside, the pressure at sampling pipe 1 injection port place is equal with calibration value, thus ensure gas-monitoring degree of accuracy.
Above-described embodiment is only be described preferred implementation of the present utility model; not scope of the present utility model is limited; under the prerequisite not departing from the utility model design spirit; the various distortion that those of ordinary skill in the art make the technical solution of the utility model and improvement, all should fall in protection domain that the utility model claims determine.
Claims (6)
1. a pressure stability sampling apparatus, comprise sampling pipe (1), pressure stability chamber (2) and gas monitoring instrument (3), described sampling pipe (1) is communicated in the air intake opening of described pressure stability chamber (2), it is characterized in that: the escape pipe of described pressure stability chamber (2) is communicated in described gas-monitoring instrument (3) by multi-limbed tube, the inlet end of described sampling pipe (1) is provided with first-class gauge (4) and restrictor (5) successively, described pressure stability chamber (2) also has the port of connection regulation device (6), described regulation device (6) comprises second gauge (7), ratio adjusting valve (8), vacuum pump (9) and PC (10), described pressure stability chamber (2) is connected with described vacuum pump (9) by breather line, described breather line is installed described second gauge (7) and described ratio adjusting valve (8), described PC (10) respectively with described first-class gauge (4), second gauge (7), ratio adjusting valve (8), restrictor (5) is connected with vacuum pump (9).
2. pressure stability sampling apparatus as claimed in claim 1, it is characterized in that: the escape pipe of described gas-monitoring instrument (3) is communicated in described vacuum pump (9) by multi-limbed tube, be provided with the 3rd flowmeter (11) and variable valve (12) between described gas-monitoring instrument (3) and vacuum pump (9), described 3rd flowmeter (11) is connected with described PC (10) respectively with variable valve (12).
3. pressure stability sampling apparatus as claimed in claim 2, it is characterized in that: between described first-class gauge (4) and restrictor (5), thermometer, hygrometer are also installed, described pressure stability chamber (2) is also connected with flowmeter, hygrometer and thermometer.
4. pressure stability sampling apparatus as claimed in claim 3, is characterized in that: described second gauge (7) and ratio adjusting valve (8) available quality flow controller are replaced.
5. pressure stability sampling apparatus as claimed in claim 4, is characterized in that: described PC (10) is also connected with alarm.
6. pressure stability sampling apparatus as claimed in claim 1, is characterized in that: described restrictor (5) is metering hole or mass flow controller, and described mass flow controller is connected with described PC (10).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201420429089.9U CN204064740U (en) | 2014-07-31 | 2014-07-31 | Pressure stability sampling apparatus |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201420429089.9U CN204064740U (en) | 2014-07-31 | 2014-07-31 | Pressure stability sampling apparatus |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN204064740U true CN204064740U (en) | 2014-12-31 |
Family
ID=52206228
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201420429089.9U Withdrawn - After Issue CN204064740U (en) | 2014-07-31 | 2014-07-31 | Pressure stability sampling apparatus |
Country Status (1)
| Country | Link |
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| CN (1) | CN204064740U (en) |
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104122122A (en) * | 2014-07-31 | 2014-10-29 | 中国环境科学研究院 | Pressure stabilizing sampling device |
| CN107741287A (en) * | 2017-11-06 | 2018-02-27 | 佛山融芯智感科技有限公司 | A kind of integrated force sensor |
| CN110764543A (en) * | 2018-07-26 | 2020-02-07 | 中国石油天然气股份有限公司 | Device and method for maintaining vacuum degree of instrument analyzer |
| CN115420256A (en) * | 2022-11-04 | 2022-12-02 | 开拓导航控制技术股份有限公司 | Height measuring device, aircraft and height measuring system |
-
2014
- 2014-07-31 CN CN201420429089.9U patent/CN204064740U/en not_active Withdrawn - After Issue
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104122122A (en) * | 2014-07-31 | 2014-10-29 | 中国环境科学研究院 | Pressure stabilizing sampling device |
| CN104122122B (en) * | 2014-07-31 | 2016-06-29 | 中国环境科学研究院 | Pressure stability sampling apparatus |
| CN107741287A (en) * | 2017-11-06 | 2018-02-27 | 佛山融芯智感科技有限公司 | A kind of integrated force sensor |
| CN110764543A (en) * | 2018-07-26 | 2020-02-07 | 中国石油天然气股份有限公司 | Device and method for maintaining vacuum degree of instrument analyzer |
| CN115420256A (en) * | 2022-11-04 | 2022-12-02 | 开拓导航控制技术股份有限公司 | Height measuring device, aircraft and height measuring system |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| AV01 | Patent right actively abandoned |
Granted publication date: 20141231 Effective date of abandoning: 20160629 |
|
| C25 | Abandonment of patent right or utility model to avoid double patenting |