CN210109070U - Gas pretreatment device with reverse pumping function and gas detection device - Google Patents
Gas pretreatment device with reverse pumping function and gas detection device Download PDFInfo
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- CN210109070U CN210109070U CN201920357628.5U CN201920357628U CN210109070U CN 210109070 U CN210109070 U CN 210109070U CN 201920357628 U CN201920357628 U CN 201920357628U CN 210109070 U CN210109070 U CN 210109070U
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- 238000001514 detection method Methods 0.000 title claims abstract description 24
- 238000005086 pumping Methods 0.000 title claims description 17
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims abstract description 25
- 239000002245 particle Substances 0.000 claims abstract description 13
- 238000007781 pre-processing Methods 0.000 claims abstract 2
- 238000010790 dilution Methods 0.000 claims description 33
- 239000012895 dilution Substances 0.000 claims description 33
- 238000012360 testing method Methods 0.000 abstract description 6
- OMPJBNCRMGITSC-UHFFFAOYSA-N Benzoylperoxide Chemical compound C=1C=CC=CC=1C(=O)OOC(=O)C1=CC=CC=C1 OMPJBNCRMGITSC-UHFFFAOYSA-N 0.000 abstract 1
- 239000007789 gas Substances 0.000 description 62
- 239000000243 solution Substances 0.000 description 7
- 238000010586 diagram Methods 0.000 description 5
- 238000003825 pressing Methods 0.000 description 5
- 239000010865 sewage Substances 0.000 description 5
- 238000000034 method Methods 0.000 description 4
- 238000005259 measurement Methods 0.000 description 3
- 239000000835 fiber Substances 0.000 description 2
- 238000004566 IR spectroscopy Methods 0.000 description 1
- 238000013461 design Methods 0.000 description 1
- 238000009792 diffusion process Methods 0.000 description 1
- 238000007865 diluting Methods 0.000 description 1
- 239000000428 dust Substances 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 239000012530 fluid Substances 0.000 description 1
- 239000012535 impurity Substances 0.000 description 1
- 239000007788 liquid Substances 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 230000002093 peripheral effect Effects 0.000 description 1
- 238000000926 separation method Methods 0.000 description 1
- 239000004071 soot Substances 0.000 description 1
- 238000006467 substitution reaction Methods 0.000 description 1
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Abstract
The utility model provides a gaseous preprocessing device and gaseous detection device with function is taken out in reverse, include: the device comprises an oil-water separator, a particle filter, a three-way valve I, a three-way valve II, a three-way joint I, an air pump, a flowmeter I, a pressure gauge, a two-way valve, a switch I, a switch II, a switch V and a switch VI; the oil-water separator, the particle filter, the three-way valve I, the air pump, the three-way valve II, the three-way joint I, the flowmeter I, the pressure gauge and the two-way valve are sequentially connected to form a passage, and the switch I, the switch II, the switch V and the switch VI respectively control the three-way valve I, the three-way valve II, the air pump and the two-way valve. The utility model discloses a back check out test set provides stable, the constant temperature and pressure of flowing, dry clear gas, improves the reliability of gas test result greatly and prolongs gaseous check out test set's life.
Description
Technical Field
The invention relates to the field of gas detection, in particular to a gas pretreatment device with a reverse pumping function and a gas detection device.
Background
For gas detection equipment applied to various industries, for example, for detection equipment for detecting components of automobile exhaust by means of infrared spectroscopy technology, the presence of water vapor has a certain influence on the accuracy of the detection in the detection. In addition, due to the existence of particulate matters such as soot and dust in water vapor and automobile exhaust, various detection devices are polluted and damaged, and the service life of the detection devices is shortened. In addition, the instability of the values such as the gas flow rate, the gas temperature, the gas pressure and the like also brings certain errors to the test result.
Disclosure of Invention
In view of the above problems, the present design aims to develop a gas pretreatment device and a gas detection device with a reverse pumping function.
The invention provides a gas pretreatment device with a reverse pumping function and a gas detection device, comprising: the device comprises an oil-water separator, a particle filter, a three-way valve I, a three-way valve II, a three-way joint I, an air pump, a flowmeter I, a pressure gauge, a two-way valve, a switch I, a switch II, a switch V and a switch VI;
the air inlet end of the oil-water separator is connected with the atmosphere, the air outlet end of the oil-water separator is connected with the air inlet end of the particle filter through a connecting pipe, the port A of the three-way valve I is connected with the air outlet end of the particle filter through a connecting pipe, the air inlet end of the air pump is connected with the port B of the three-way valve I through a connecting pipe, the port A of the three-way valve II is connected with the air outlet end of the air pump through a connecting pipe, the port A of the three-way joint I is connected with the port B of the three-way valve II through a connecting pipe, and the port C of the three-way joint I is connected with the port C of the three-way; the air inlet end of the flowmeter I is connected with the port B of the tee joint I through a connecting pipe; the gas inlet end of the pressure gauge is connected with the gas outlet end of the flowmeter I through a connecting pipe; the air inlet end of the two-way valve is connected with the air outlet end of the pressure gauge through a connecting pipe;
the switch I and the switch II respectively control the three-way valve I and the three-way valve II; the switch V and the switch VI respectively control the air pump and the two-way valve.
Further, still include: further comprising: an air dilution pump, a flowmeter II, a blade type mixer and a switch VII;
the air dilution pump and the flowmeter II form a second loop, and the air outlet end of the air dilution pump is connected with the air inlet end of the flowmeter II through a connecting pipe; the air outlet ends of the flowmeter I and the flowmeter II are connected with the air inlet end of the blade type mixer through a connecting pipe; the air inlet end of the pressure gauge is connected with the air outlet end of the blade type mixer through a connecting pipe; the switch VII controls the dilution pump.
Further, still include: a three-way valve III, a three-way valve IV, a three-way joint II, a switch III and a switch IV;
the port A of the three-way valve III is connected with the atmosphere, the port B of the three-way valve III is connected with the air inlet end of the air dilution pump through a connecting pipe, the port A of the three-way valve IV is connected with the air outlet end of the air dilution pump through a connecting pipe, the port B of the three-way valve IV is connected with the port A of the three-way joint II through a connecting pipe, and the port C of the three-way joint II is connected with the port C of the three-way valve III through a connecting pipe; the air inlet end of the second flowmeter is connected with the port B of the three-way joint II through a connecting pipe; the switch III and the switch IV are respectively used for controlling the three-way valve III and the three-way valve IV.
Further, still include: a box body for accommodating the three-way valve I, the three-way valve II, the three-way valve III, the three-way valve IV, the air pump, the air dilution pump, the two-way valve, the flowmeter I, the flowmeter II and the pressure gauge;
the switch I, the switch II, the switch III and the switch IV which respectively control the three-way valve I, the three-way valve II, the three-way valve III and the three-way valve IV by hand, and the switch V, the switch VI and the switch VII which respectively control the air pump, the air dilution pump and the two-way valve are all fixed on the box door of the box body;
the flowmeter I, the flowmeter II and the pressure gauge are all embedded on the box door;
the box body is provided with four through holes which are respectively used for connecting the air inlet end of the oil-water separator, the port C of the three-way valve II and the port C of the three-way valve IV.
The invention also provides a gas detection device, which comprises the gas pretreatment device with the back pumping function and a gas detector;
and the gas inlet end of the gas detector is connected with the gas outlet end of the body front end pre-detection device through a connecting pipe.
The invention solves the problems of instability of numerical values such as gas flow, gas temperature, gas pressure and the like, errors in test results and the like. The gas detection device provides stable flowing, constant temperature and pressure, dry and clean gas for the following detection equipment, greatly improves the reliability of gas test results and prolongs the service life of the gas detection equipment.
Drawings
In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings needed to be used in the description of the embodiments or the prior art will be briefly introduced below, and it is obvious that the drawings in the following description are some embodiments of the present invention, and for those skilled in the art, other drawings can be obtained according to these drawings without creative efforts.
FIG. 1 is a schematic overall structure diagram according to an embodiment of the present invention;
FIG. 2 is a schematic overall structure diagram of a second embodiment of the present invention;
FIG. 3 is a schematic diagram of the overall structure of the embodiment of the present invention;
FIG. 4 is a schematic diagram of an overall structure of an embodiment of the present invention;
fig. 5 is a schematic diagram of a fourth overall structure according to an embodiment of the present invention.
Wherein 1, oil water separator, 2, particle filter, 3, three-way valve I, 31, port A of three-way valve I, 32, port B of three-way valve I, 33, port C of three-way valve I, 4, air pump, 5, three-way valve II, 51, port A of three-way valve II, 52, port B of three-way valve II, 53, port C of three-way valve II, 6, flowmeter I, 7, three-way joint II, 71, port A of three-way joint II, 72, port B of three-way joint II, 73, port C of three-way joint II, 8, pressure gauge, 9, two-way valve, 10, blade mixer, 11, air dilution pump, 12, flowmeter II, 14, three-way valve III, 141, port A of three-way valve III, 142, port B of three-way valve III, 143, port C of three-way valve III, 15, three-way valve IV, 151, port A of three-way valve IV, 152, port B of three-way valve, Three way connection I, 161, three way connection I's A mouth, 162, three way connection I's B mouth, 163, three way connection I's C mouth, 17, gas detector, 18, switch I, 19, switch II, 20, switch III, 21, switch IV, 22, switch V, 23, switch VI, 24, switch VII.
Detailed Description
In order to make the objects, technical solutions and advantages of the embodiments of the present invention clearer, the technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are some, but not all, embodiments of the present invention. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.
The invention provides a gas pretreatment device with a reverse pumping function and a gas detection device, comprising: the device comprises an oil-water separator, a particle filter, a three-way valve I, a three-way valve II, a three-way joint I, an air pump, a flowmeter I, a pressure gauge, a two-way valve, a switch I, a switch II, a switch V and a switch VI;
the air inlet end of the oil-water separator is connected with the atmosphere, the air outlet end of the oil-water separator is connected with the air inlet end of the particle filter through a connecting pipe, the port A of the three-way valve I is connected with the air outlet end of the particle filter through a connecting pipe, the air inlet end of the air pump is connected with the port B of the three-way valve I through a connecting pipe, the port A of the three-way valve II is connected with the air outlet end of the air pump through a connecting pipe, the port A of the three-way joint I is connected with the port B of the three-way valve II through a connecting pipe, and the port C of the three-way joint I is connected with the port C of the three-way; the air inlet end of the flowmeter I is connected with the port B of the tee joint I through a connecting pipe; the gas inlet end of the pressure gauge is connected with the gas outlet end of the flowmeter I through a connecting pipe; the air inlet end of the two-way valve is connected with the air outlet end of the pressure gauge through a connecting pipe;
the switch I and the switch II respectively control the three-way valve I and the three-way valve II; the switch V and the switch VI respectively control the air pump and the two-way valve.
Specifically, as shown in fig. 1, in the first embodiment, before the switch I, the switch II, the switch V, and the switch VI are respectively a knob I, a knob II, a button I, and a button II, and the whole set of equipment is started, in order to verify whether the whole pipeline leaks air, before working, pipeline leak detection operation is required, and the button I is pressed to start the air pump; and pressing the button II, closing the two-way valve, enabling the gas to be detected to flow through the whole pipeline, observing whether the index of the pressure gauge is kept unchanged, if the pressure keeps a certain numerical value unchanged, the pressure gauge can be considered to be air-tight, and if the pressure numerical value fluctuates greatly, the pressure gauge flashes red light to prompt an alarm.
And (4) normal operation: electrifying all the equipment, pressing the button I and starting the air pump; rotating the knob I and the knob II leftwards, and respectively opening the three-way valve I and the three-way valve II to enable the gas to be detected to flow from the port A to the port B, wherein the direction from the port B to the port A is closed; under the action of the three-way valve I, the air suction pump and the three-way valve II, the pretreatment of the gas to be detected is realized; oil water separator is miniature equipment, arranges the foremost in whole return circuit for carry out primary oil water separating operation, oil water separator's theory of operation to the gas that awaits measuring: the sewage pump sends the oily sewage into the oil-water separator, and after the oily sewage passes through the diffusion nozzle, large oil drops float on the top of the left oil collecting chamber; sewage containing small oil drops enters a corrugated plate coalescer at the lower part, and the oil drops at the lower part are polymerized into larger oil drops to a right oil collecting chamber; passing the sewage containing smaller oil drops through a fine filter, removing impurities in water, and sequentially entering a fiber polymerizer to polymerize the fine oil drops into larger oil drops to be separated from water; after separation, clean water is discharged through a discharge port, dirty oil in the left oil collecting chamber and the right oil collecting chamber is automatically discharged through an electromagnetic valve, and the dirty oil separated from the fiber polymerizer is discharged through a manual valve; the discharged dirty oil is further filtered through a particle filter, and finally the filtered gas to be detected enters through an opening A of the three-way valve I, is discharged from an opening B of the three-way valve I, flows through the air pump to enter the opening A of the three-way valve II, is discharged to the opening A of the three-way joint I through the opening B of the three-way valve II, and is discharged to the flowmeter I, the pressure gauge and the two-way valve through the opening B of the three-way joint I; the flowmeter I is used for detecting the flow of the gas to be detected;
the reverse pumping process: the knob I and the knob II need to be rotated rightwards, the three-way valve I and the three-way valve II are respectively opened, so that the gas to be detected flows to the port A from the port B, and at the moment, the direction from the port A to the port B is closed; pressing the button I to start the air pump; according to the working principle of a three-way valve, in the reverse pumping process, a port B of the three-way valve II is not communicated with a port A of the three-way joint I, and pipelines at the front end of the port A of the three-way valve I are not communicated; at this time, the flow directions of the flow meter I and the gas remaining in the last pretreatment in the pressure gauge after the port B of the three-way joint I are as follows: the port B of the three-way joint I → the port C of the three-way valve I → the port B of the three-way valve I → the air suction pump air inlet → the air suction pump air outlet → the port A of the three-way valve II → the port C of the three-way valve II, and is discharged to the atmosphere through the port C of the three-way valve II; in order to prevent the gas residue equipment and pipeline of the last measurement from causing errors to the next measurement, part of gas remained in the pipeline after the previous measurement is pumped out reversely, thereby improving the success rate of detection.
Further, still include: an air dilution pump, a flowmeter II, a blade type mixer and a switch VII;
the air dilution pump and the flowmeter II form a second loop, and the air outlet end of the air dilution pump is connected with the air inlet end of the flowmeter II through a connecting pipe; the air outlet ends of the flowmeter I and the flowmeter II are connected with the air inlet end of the blade type mixer through a connecting pipe; the air inlet end of the pressure gauge is connected with the air outlet end of the blade type mixer through a connecting pipe; the switch VII controls the dilution pump.
Specifically, as shown in fig. 2, in the second embodiment, the switch VII is a button III, and the button III for controlling the air dilution pump is pressed at the same time to start the air dilution pump, the air dilution pump sucks external air into the pipeline for diluting the gas to be measured with an excessively high concentration, the sucked air flows through the flow meter II for detecting the flow rate of the air, the gas to be measured flowing through the flow meter II is mixed with the gas to be measured flowing through the flow meter I, and the two gases flow through the vane mixer at the same time; the mixing chamber of the vane type mixer is formed by a series of mixing units with different specifications, which are arranged in a hollow pipeline, and the two gases are rotated leftwards and rightwards sometimes under the action of the mixing units, so that the flowing directions are changed constantly, the central liquid flow is pushed to the periphery, and the peripheral fluid is pushed to the center, thereby causing good radial mixing effect. Meanwhile, the rotation action of the two gases also occurs on the interface at the joint of the adjacent components, and the perfect radial circulation mixing action enables the two gases to achieve the purpose of uniform mixing.
Further, still include: a three-way valve III, a three-way valve IV, a three-way joint II, a switch III and a switch IV;
the port A of the three-way valve III is connected with the atmosphere, the port B of the three-way valve III is connected with the air inlet end of the air dilution pump through a connecting pipe, the port A of the three-way valve IV is connected with the air outlet end of the air dilution pump through a connecting pipe, the port B of the three-way valve IV is connected with the port A of the three-way joint II through a connecting pipe, and the port C of the three-way joint II is connected with the port C of the three-way valve III through a connecting pipe; the air inlet end of the second flowmeter is connected with the port B of the three-way joint II through a connecting pipe; the switch III and the switch IV are respectively used for controlling the three-way valve III and the three-way valve IV.
Specifically, as shown in fig. 3, in the third embodiment, the switches III and IV are knobs III and IV, respectively, and the air inlet end and the air outlet end of the air dilution pump are connected to the three-way valve III and the three-way valve IV through connecting pipes, respectively;
when the normal work is carried out: pressing the button III, starting the air dilution pump, simultaneously rotating the knob III and the knob IV leftwards, enabling air to enter through the port A of the three-way valve III, be discharged from the port B of the three-way valve III, flow through the air dilution pump, enter the port A of the three-way valve IV, be discharged to the port A of the three-way joint II through the port B of the three-way valve IV, and be discharged to the flow meter II through the port B of the three-way joint II;
the reverse pumping process: the knob III and the knob IV need to be rotated rightwards, the three-way valve III and the three-way valve IV are respectively opened, so that the gas to be detected flows to the port A from the port B, and at the moment, the direction from the port A to the port B is closed; pressing the button I to start the air pump; according to the working principle of a three-way valve, in the reverse pumping process, the port B of the three-way valve IV is not communicated with the port A of the three-way joint II; at this time, the gas flow direction remaining in the previous pretreatment in the equipment after the port B of the three-way joint II is: the port B of the three-way joint II → the port C of the three-way valve III → the port B of the three-way valve III → the air inlet end of the air dilution pump → the air outlet end of the air dilution pump → the port A of the three-way valve IV → the port C of the three-way valve IV, and is discharged to the atmosphere through the port C of the three-way valve IV;
further, still include: a box body for accommodating the three-way valve I, the three-way valve II, the three-way valve III, the three-way valve IV, the air pump, the air dilution pump, the two-way valve, the flowmeter I, the flowmeter II and the pressure gauge;
the knob I, the knob II, the knob III and the knob IV which respectively control the three-way valve I, the three-way valve II, the three-way valve III and the three-way valve IV manually and the button I, the button II and the button III which respectively control the air pump, the air dilution pump and the two-way valve are all fixed on the door of the box body;
the flowmeter I, the flowmeter II and the pressure gauge are all embedded on the box door;
the box body is provided with four through holes which are respectively used for connecting the air inlet end of the oil-water separator, the port C of the three-way valve II and the port C of the three-way valve IV.
Specifically, as shown in fig. 5, in the fourth embodiment, all the devices and circuits are disposed in the box body, and in order to control each device, the knobs and the buttons for control are fixed on the box door through bolts; meanwhile, in order to read data conveniently, a dial plate of instrument equipment is embedded on the box door; the box body is also provided with four through holes which are respectively used for connecting the air inlet end of the oil-water separator, the port C of the three-way valve II and the port C of the three-way valve IV; the equipment control and the data reading are more convenient and faster.
The invention also provides a gas detection device, which comprises the gas pretreatment device with the back pumping function and a gas detector;
and the gas inlet end of the gas detector is connected with the gas pretreatment device with the back pumping function and the gas outlet end of the gas detection device through connecting pipes.
Specifically, as shown in fig. 4, in the fifth embodiment, the gas detector is an external device, and may be connected to the two-way valve in the box through a through hole in the box, so as to detect the gas flowing through the two-way valve.
Finally, it should be noted that: the above embodiments are only used to illustrate the technical solution of the present invention, and not to limit the same; while the invention has been described in detail and with reference to the foregoing embodiments, it will be understood by those skilled in the art that: the technical solutions described in the foregoing embodiments may still be modified, or some or all of the technical features may be equivalently replaced; and the modifications or the substitutions do not make the essence of the corresponding technical solutions depart from the scope of the technical solutions of the embodiments of the present invention.
Claims (5)
1. The utility model provides a gaseous preprocessing device with function is taken out in contrary, its characterized in that includes: the device comprises an oil-water separator, a particle filter, a three-way valve I, a three-way valve II, a three-way joint I, an air pump, a flowmeter I, a pressure gauge, a two-way valve, a switch I, a switch II, a switch V and a switch VI;
the air inlet end of the oil-water separator is connected with the atmosphere, the air outlet end of the oil-water separator is connected with the air inlet end of the particle filter through a connecting pipe, the port A of the three-way valve I is connected with the air outlet end of the particle filter through a connecting pipe, the air inlet end of the air pump is connected with the port B of the three-way valve I through a connecting pipe, the port A of the three-way valve II is connected with the air outlet end of the air pump through a connecting pipe, the port A of the three-way joint I is connected with the port B of the three-way valve II through a connecting pipe, and the port C of the three-way joint I is connected with the port C of the three-way; the air inlet end of the flowmeter I is connected with the port B of the tee joint I through a connecting pipe; the gas inlet end of the pressure gauge is connected with the gas outlet end of the flowmeter I through a connecting pipe; the air inlet end of the two-way valve is connected with the air outlet end of the pressure gauge through a connecting pipe;
the switch I and the switch II respectively control the three-way valve I and the three-way valve II; the switch V and the switch VI respectively control the air pump and the two-way valve.
2. The gas pretreatment device with back-pumping function according to claim 1, further comprising: an air dilution pump, a flowmeter II, a blade type mixer and a switch VII;
the air dilution pump and the flowmeter II form a second loop, and the air outlet end of the air dilution pump is connected with the air inlet end of the flowmeter II through a connecting pipe; the air outlet ends of the flowmeter I and the flowmeter II are connected with the air inlet end of the blade type mixer through a connecting pipe; the air inlet end of the pressure gauge is connected with the air outlet end of the blade type mixer through a connecting pipe; the switch VII controls the dilution pump.
3. The gas pretreatment device with back-suction function according to claim 2, further comprising: a three-way valve III, a three-way valve IV, a three-way joint II, a switch III and a switch IV;
the port A of the three-way valve III is connected with the atmosphere, the port B of the three-way valve III is connected with the air inlet end of the air dilution pump through a connecting pipe, the port A of the three-way valve IV is connected with the air outlet end of the air dilution pump through a connecting pipe, the port B of the three-way valve IV is connected with the port A of the three-way joint II through a connecting pipe, and the port C of the three-way joint II is connected with the port C of the three-way valve III through a connecting pipe; the air inlet end of the flowmeter II is connected with the port B of the three-way joint II through a connecting pipe; the switch III and the switch IV are respectively used for controlling the three-way valve III and the three-way valve IV.
4. The gas pretreatment device with back-pumping function according to claim 3, further comprising: a box body for accommodating the three-way valve I, the three-way valve II, the three-way valve III, the three-way valve IV, the air pump, the air dilution pump, the two-way valve, the flowmeter I, the flowmeter II and the pressure gauge;
the switch I, the switch II, the switch III and the switch IV which respectively control the three-way valve I, the three-way valve II, the three-way valve III and the three-way valve IV by hand, and the switch V, the switch VI and the switch VII which respectively control the air pump, the air dilution pump and the two-way valve are all fixed on the box door of the box body;
the flowmeter I, the flowmeter II and the pressure gauge are all embedded on the box door;
the box body is provided with four through holes which are respectively used for connecting the air inlet end of the oil-water separator, the port C of the three-way valve II and the port C of the three-way valve IV.
5. A gas detection apparatus, comprising the gas pretreatment apparatus with back-pumping function and the gas detector of any one of claims 1 to 4;
and the air inlet end of the gas detector is connected with the air outlet end of the gas pretreatment device with the back pumping function through a connecting pipe.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201920357628.5U CN210109070U (en) | 2019-03-20 | 2019-03-20 | Gas pretreatment device with reverse pumping function and gas detection device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201920357628.5U CN210109070U (en) | 2019-03-20 | 2019-03-20 | Gas pretreatment device with reverse pumping function and gas detection device |
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| Publication Number | Publication Date |
|---|---|
| CN210109070U true CN210109070U (en) | 2020-02-21 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201920357628.5U Withdrawn - After Issue CN210109070U (en) | 2019-03-20 | 2019-03-20 | Gas pretreatment device with reverse pumping function and gas detection device |
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| CN (1) | CN210109070U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109932490A (en) * | 2019-03-20 | 2019-06-25 | 西安航空学院 | Gas pretreatment device with reverse pumping function and gas detection device |
-
2019
- 2019-03-20 CN CN201920357628.5U patent/CN210109070U/en not_active Withdrawn - After Issue
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109932490A (en) * | 2019-03-20 | 2019-06-25 | 西安航空学院 | Gas pretreatment device with reverse pumping function and gas detection device |
| CN109932490B (en) * | 2019-03-20 | 2024-02-13 | 西安航空学院 | Gas pretreatment device with back-pumping function and gas detection device |
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