CN2489321Y - Sampler for sand devil - Google Patents
Sampler for sand devil Download PDFInfo
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- CN2489321Y CN2489321Y CN 01233842 CN01233842U CN2489321Y CN 2489321 Y CN2489321 Y CN 2489321Y CN 01233842 CN01233842 CN 01233842 CN 01233842 U CN01233842 U CN 01233842U CN 2489321 Y CN2489321 Y CN 2489321Y
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- filter cylinder
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- aspiration pump
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Abstract
The utility model relates to a dust storm sampler, which is used for collecting grains in dust storm whether, sand blowing whether and floating whether. The utility model aims to solve the technical problems that: the prior total suspended particles sampler and the inhalable particulate matter sampler can not place the direction of the wind to the sampling entrance. The utility model contains a mainframe, a filter drum outer bush 1 and a sampling tube 2; wherein the sampling tube 2 is a bended tube. A sampling nozzle axes of the sampling tube is vertical to the axes of an exhausting terminal 4 which is connected with the upper terminal of the filter drum outer bush 1 through a rotation device which can enable the sampling tube 2 rotate on the filter drum outer bush 1; and a wind rudder 5 is arranged on the filter drum outer bush 1. The utility model is mainly used for sampling the grains in dust storm whether, sand blowing whether and floating whether, which enable the sampling nozzle 3 axes of the sampling tube 2 aim at the wind blowing direction, so as to realize isodromic sampling.
Description
Technical field:
The utility model relates to the sampling thief that is used to gather particulate in air in a kind of environmental monitoring field, exactly is a kind of sampling thief of gathering sandstorm weather, dust and sand weather, floating dust weather particulate in air.
Background technology:
At present, widely used particle sampler in the environmental monitoring field is divided into overall suspended pellet sampling thief and pellet sampling thief two big classes.Overall suspended pellet, promptly total suspended particles is called for short TSP, and it is meant the particle of aerodynamics equivalent diameter below 100 μ m; Pellet is called for short IP or PM10, and it is meant the particle of aerodynamics equivalent diameter less than 10 μ m, and this particle can enter upper and lower respiratory tract with breathing, so claim pellet.In recent years, because ecologic environment suffers destruction in various degree, sandstorm weather, dust and sand weather, floating dust weather often appear in the northern area of China, endanger increasing, caused national great attention, very urgent to the monitoring of the airborne particle content of above-mentioned weather.Overall suspended pellet sampling thief and pellet sampling thief are not in use considered the size of wind speed usually, and the density of particulate in air is less relatively, and the diameter range of particle is narrower.Overall suspended pellet sampling thief and pellet sampling thief are when sampling, the air-flow of sampling must vertically enter sampling thief from bottom to top, the speed of sampling air flow also is subjected to certain restriction, and these sampling thiefs can not make the direction of wind aim at the sampling inlet, can not realize the isokinetic sampling.Therefore, overall suspended pellet sampling thief and pellet sampling thief are unsuitable for sandstorm weather, dust and sand weather, the airborne particle of floating dust weather are sampled.
Summary of the invention:
One of the technical problems to be solved in the utility model is that existing overall suspended pellet sampling thief and pellet sampling thief can not make the direction of wind aim at the sampling inlet.For solving this technical problem, the utility model by the following technical solutions: the sandstorm sampling thief comprises main frame, filter cylinder overcoat 1 and sampling pipe 2.Its special character is: sampling pipe 2 is bend pipe, and the axis of its sampling mouth 3 is vertical mutually with the axis of outlet side 4.Connect by the whirligig that sampling pipe 2 is rotated on filter cylinder overcoat 1 between the outlet side 4 of sampling pipe 2 and the upper end of filter cylinder overcoat 1, wind direction rudder 5 is installed on the sampling pipe 2.
Main frame is used for sampling pipe 2 is bled, air is sucked in the sampling pipe 2 together with particle, measure the sampling flow velocity of the sampling mouth 3 of the flow of sampling and sampling pipe 2, main frame is measured wind speed simultaneously, and the sampling flow velocity and the wind speed of the mouth 3 of will sampling compare, according to result relatively, the sampling flow velocity of regulating sampling mouth 3 equates with wind speed.Filter cylinder overcoat 1 is used to install filter cylinder, and particle is captured by filter cylinder.The axis of the sampling mouth 3 of sampling pipe 2 is vertical mutually with the axis of outlet side 4, as long as the axis of outlet side 4 is in vertical direction, the axis of sampling mouth 3 will be in horizontal direction.Whirligig can rotate sampling pipe 2 on filter cylinder overcoat 1.Wind direction rudder 5 is moved by wind, can drive sampling pipe 2 and rotate on filter cylinder overcoat 1, makes the sampling mouth 3 of sampling pipe 2 aim at the direction that winds come.
Wind direction rudder 5 of the present utility model is a tabular, and it is vertically placed.Wind direction rudder 5 is fixed on the vertical component of sampling pipe 2, and it is positioned at and the relative side of sampling mouth 3.
Whirligig of the present utility model comprises gland nut 6, O-ring seal 7, filter cylinder gland 8, bearing 9, sealing gasket 10, O-ring seal 11 and gland nut 12, has convex shoulder 13 on the filter cylinder gland 8.O-ring seal 7 is between the lower surface of the convex shoulder 13 of the upper surface of filter cylinder overcoat 1 and filter cylinder gland 8, and the internal thread of gland nut 6 cooperates with external thread on filter cylinder overcoat 1 outer surface of upper, and gland nut 6 is pressed on the upper surface of convex shoulder 13 of filter cylinder gland 8.The outside surface of the outlet side 4 of sampling pipe 2 is installed on the inner ring of bearing 9, and the inside surface of filter cylinder gland 8 is installed on the outer ring of bearing 9.External thread on the outside surface on the internal thread of gland nut 12 and filter cylinder gland 8 tops cooperates, and sealing gasket 10 is between the upper surface and gland nut 12 of filter cylinder gland 8, and the inner edge of sealing gasket 10 contacts with the outside surface of the outlet side 4 of sampling pipe 2.Have ring groove on the gland nut 12, O-ring seal 11 is placed in this ring groove, and the inner edge of O-ring seal 11 contacts with the outside surface of the outlet side 4 of sampling pipe 2.
Have filter cylinder carriage 14 in the filter cylinder overcoat 1 of the present utility model, the suitable for reading of filter cylinder carriage 14 is fixed on the filter cylinder overcoat 1, has some through holes 15 on the filter cylinder carriage 14.
Because bigger at the sandstorm weather wind speed, under isokinetic sampling's situation, the sampling flow velocity is also very big, filter cylinder carriage 14 can be held filter cylinder, prevents that filter cylinder from being broken through by the bigger sampling air flow of flow velocity.Through hole 15 is used to make sampling air flow to pass through.
Through hole 15 of the present utility model is a circular hole, and evenly distributes on filter cylinder carriage 14.
Two of the technical problems to be solved in the utility model is that existing overall suspended pellet sampling thief and pellet sampling thief can not be realized the isokinetic sampling.For solving this technical problem, the utility model by the following technical solutions: on the basis of technique scheme, main frame of the present utility model comprises flowmeter 16, aspiration pump 17, anemoscope 18 and control circuit 19.The air inlet of flowmeter 16 is communicated with filter cylinder overcoat 1, and the air outlet of flowmeter 16 is communicated with the air inlet of aspiration pump 17, and the signal output part of flowmeter 16 is connected with the input end of control circuit.The air velocity transducer 20 of anemoscope 18 is fixed in main frame one side separately, avoids interfering with each other, and the output terminal of anemoscope 18 is connected with control circuit 19.The output terminal of control circuit 19 is connected with the motor D of aspiration pump 17.
Flowmeter 16 can adopt orifice flowmeter, the turbo flow meter of also can sampling, and it changes the flow signal of sampling into electric signal, and this electric signal is transfused in the control circuit 19 to be handled.Controlled circuit 19 controls of the motor D of aspiration pump 17, it provides the power of bleeding of sampling.Anemoscope 18 is used for changing wind velocity signal into electric signal, and this electric signal is transfused in the control circuit 19 to be handled.Control circuit 19 calculates the flow velocity of sampling air flow according to the flow signal of flowmeter 16 outputs, the wind speed that this flow velocity and anemoscope 18 are recorded compares, export control signal according to result relatively, the motor D of control aspiration pump 17 regulates rotating speed, and the sampling flow velocity in the sampling mouth 3 is equated substantially with wind speed.
Control circuit 19 of the present utility model comprises A/D converter, driving circuit and single-chip microcomputer; The signal output part of flowmeter 16 is connected with the input end of A/D converter, and the output terminal of A/D converter is connected with the I/O mouth of single-chip microcomputer; The output terminal of anemoscope 18 is connected with the I/O mouth of single-chip microcomputer; The I/O mouth of single-chip microcomputer is connected with driving circuit, and the output terminal of driving circuit is connected with the motor D of aspiration pump 17.
The single-chip microcomputer working procedure, gather and store the wind speed that anemoscope 18 records, gather and store the sampling flow velocity that flowmeter 16 records, to sample flow velocity and wind speed compares, export control signal according to relatively result to driving circuit, the rotating speed of the motor D by driving circuit bleeding regulating pump 17 makes the sampling flow velocity equate substantially with wind speed, according to the flow and the used time of sampling of sampling, calculate the volume of sampling at last.Driving circuit is subjected to Single-chip Controlling, and it provides the power supply that meets the requirements for the motor D of aspiration pump 17.
If the signal output part of flowmeter 16 output simulating signal (as orifice flowmeter), the inside of single-chip microcomputer own has A/D converter, can save outside A/D converter so, and the signal output part of flowmeter 16 directly is connected with single-chip microcomputer.If the signal output part of flowmeter 16 output digital signal (as turbo flow meter), the utility model can save A/D converter, and the signal output part of flowmeter 16 directly is connected with single-chip microcomputer.If it is simulating signal that driving circuit requires the control signal of input, can increase D/A converter, the input end of D/A converter is connected with the I/O mouth of single-chip microcomputer, and the output terminal of D/A converter is connected with driving circuit.This technical scheme of saving A/D converter and/or increasing D/A converter is all in protection domain of the present utility model.
The utility model is a bend pipe owing to sampling pipe 2, and wind direction rudder 5 is installed, and cooperates with whirligig, and sampling pipe 2 is rotated with the wind, makes the axis of the sampling mouth 3 of sampling pipe 2 aim at the direction that wind comes all the time.Because control circuit 19 of the present utility model is measuring wind and sampling flow velocity constantly, and both are compared, exporting control signal according to result relatively, the motor D of control aspiration pump 17 regulates rotating speed, the sampling flow velocity is equated substantially with wind speed, realize the isokinetic sampling.The utility model plays a protective role to filter cylinder owing to have filter cylinder carriage 14, and the flow velocity that prevents to sample breaks through filter cylinder when big.Compare with the pellet sampling thief with existing overall suspended pellet sampling thief, the utility model is because can be according to the change of wind direction, automatically regulate the direction of the sampling mouth 3 of sampling pipe 2, make the axis of sampling mouth 3 aim at the direction that wind comes all the time, and the sampling flow velocity is equated substantially with wind speed, guaranteed the correctness that the airborne particle content of sandstorm weather, dust and sand weather and floating dust weather is measured.When the bigger sandstorm weather of wind speed was sampled, because the sampling flow velocity is bigger, 14 pairs of filter cylinders of filter cylinder carriage played a protective role, and make the utility model be particularly suitable for measuring at sandstorm weather.
Description of drawings:
Fig. 1 is a structural representation of the present utility model.
Fig. 2 is the enlarged drawing of sampling pipe 2 and the connecting relation figure of filter cylinder overcoat 1 among Fig. 1.
Fig. 3 is a circuit block diagram of the present utility model.
Fig. 4 is the physical circuit figure of driving circuit among Fig. 3.
Embodiment:
Below in conjunction with accompanying drawing embodiment of the present utility model is described in detail.
As shown in Figures 1 to 4, present embodiment is a kind of sandstorm sampling thief that sandstorm weather particulate in air content is measured, and it comprises main frame, filter cylinder overcoat 1, filter cylinder carriage 14, sampling pipe 2, whirligig, wind direction rudder 5, connecting pipe 21 and support 23.Sampling pipe 2 is a bend pipe, and its end is equipped with sampling mouth 3, and the other end is outlet side 4, and the axis of sampling mouth 3 is vertical mutually with the axis of outlet side 4.Wind direction rudder 5 is a tabular, and it is vertically placed.Wind direction rudder 5 is fixed on the vertical component of sampling pipe 2, and it is positioned at and the relative side of sampling mouth 3.Connect by whirligig between the outlet side 4 of sampling pipe 2 and the upper end of filter cylinder overcoat 1.Whirligig comprises gland nut 6, O-ring seal 7, filter cylinder gland 8, bearing 9, sealing gasket 10, O-ring seal 11 and gland nut 12.Has convex shoulder 13 on the filter cylinder gland 8.O-ring seal 7 is between the lower surface of the convex shoulder 13 of the upper surface of filter cylinder overcoat 1 and filter cylinder gland 8, and the internal thread of gland nut 6 cooperates with external thread on filter cylinder overcoat 1 outer surface of upper, and gland nut 6 is pressed on the upper surface of convex shoulder 13 of filter cylinder gland 8.The outside surface of the outlet side 4 of sampling pipe 2 is installed on the inner ring of bearing 9, and the inside surface of filter cylinder gland 8 is installed on the outer ring of bearing 9.External thread on the outside surface on the internal thread of gland nut 12 and filter cylinder gland 8 tops cooperates, and sealing gasket 10 is between the upper surface and gland nut 12 of filter cylinder gland 8, and the inner edge of sealing gasket 10 contacts with the outside surface of the outlet side 4 of sampling pipe 2.Have ring groove on the gland nut 12, O-ring seal 11 is placed in this ring groove, and the inner edge of O-ring seal 11 contacts with the outside surface of the outlet side 4 of sampling pipe 2.Filter cylinder carriage 14 is positioned at filter cylinder overcoat 1, and the suitable for reading of filter cylinder carriage 14 is welded on the filter cylinder overcoat 1.Have some through holes 15 on the filter cylinder carriage 14, this through hole 15 is a circular hole, and evenly distributes on filter cylinder carriage 14.Main frame comprises flowmeter 16, aspiration pump 17, aspiration pump overcoat 24, anemoscope 18 and control circuit 19.Flowmeter 16 adopts orifice flowmeter.The lower end of filter cylinder overcoat 1 connects with the upper end of connecting pipe 21, and the lower end of connecting pipe 21 connects with the air inlet of flowmeter 16, and the air outlet of flowmeter 16 connects with the air inlet of aspiration pump 17.Aspiration pump 17 is installed in the aspiration pump overcoat 24, and support 23 is installed in the bottom of aspiration pump overcoat 24.Control circuit 19 comprises A/D converter, driving circuit and single-chip microcomputer.A/D converter adopts AD0809, and single-chip microcomputer adopts 80C32.The signal output part of flowmeter 16 is connected with the input end of A/D converter, and the output terminal of A/D converter is connected with the I/O mouth of single-chip microcomputer.The output terminal of anemoscope 18 is connected with the I/O mouth of single-chip microcomputer.The I/O mouth of single-chip microcomputer is connected with driving circuit, and the output terminal of driving circuit is connected with the motor D of aspiration pump 17.The air velocity transducer 20 of anemoscope 18 is fixed in main frame one side separately.Driving circuit comprises photoelectrical coupler GD, controllable silicon T, resistance R 1, resistance R 2, resistance R 3, resistance R 4, capacitor C 1 and capacitor C 2.Photoelectrical coupler GD adopts MOC3021, and its 1 pin is connected with the I/O mouth of single-chip microcomputer with 2 pin, and its 6 pin are connected with an end of resistance R 1 and the control utmost point of controllable silicon T, and the other end of resistance R 1 is connected with a of AC power end.4 pin of photoelectrical coupler GD are connected with an end of resistance R 2, the other end of resistance R 2 is connected with an end of resistance R 3 and an end of capacitor C 1, the other end of capacitor C 1 is connected with a of AC power end, and the other end of resistance R 3 is connected with the end of the motor D of aspiration pump 17.The 1st anode of controllable silicon T is connected with a of AC power end, and the 2nd anode is connected with the end of the motor D of aspiration pump 17.Capacitor C 2 is connected with resistance R 4, and an end of this series circuit is connected with a of AC power end, and the other end is connected with the end of the motor D of aspiration pump 17.The other end of the motor D of aspiration pump 17 is connected with the b of AC power end.
During use, at first the weight of weighing filter cylinder 22 is put into filter cylinder overcoat 1 with filter cylinder 22 then, and the upper port of filter cylinder 22 is placed between the upper surface and O-ring seal 7 of filter cylinder overcoat 1, with filter cylinder gland 8 be placed on O-ring seal 7 above, at last gland nut 6 is screwed on filter cylinder overcoat 1.Regulate support 23, make the axis of the outlet side 4 of sampling pipe 2 be in the upright position, the axis of sampling mouth 3 is in horizontal level.Start main frame, make aspiration pump 17 begin to bleed.Wind direction rudder 5 is moved in wind, and the wind direction rudder drives sampling pipe 2 and rotates, and makes the next direction of axis alignment wind of sampling mouth 3.Single-chip microcomputer is constantly gathered the wind velocity signal of anemoscope 18 outputs and the sampling flow velocity signal of flowmeter 16 outputs, and both are compared, export control signal according to result relatively, the rotating speed of the motor D of control Driver Circuit bleeding regulating pump 17 makes the sampling flow velocity equate substantially with wind speed.Particle in the sampling process in the sampling air flow is trapped in the filter cylinder 22.Single-chip microcomputer writes down the used time of sampling simultaneously, and calculates sampling volume.After sampling finished, the gland nut 6 of outwarding winding just can take off filter cylinder 22 and carry out weighing.
Claims (8)
1. the sandstorm sampling thief comprises main frame, filter cylinder overcoat (1) and sampling pipe (2); It is characterized in that: sampling pipe (2) is a bend pipe, and the axis of its sampling mouth (3) is vertical mutually with the axis of outlet side (4); Connect by making sampling pipe (2) go up the whirligig that rotates between the outlet side (4) of sampling pipe (2) and the upper end of filter cylinder overcoat (1), wind direction rudder (5) is installed on the sampling pipe (2) at filter cylinder overcoat (1).
2. sandstorm sampling thief according to claim 1 is characterized in that: wind direction rudder (5) is a tabular, and it is vertically placed; Wind direction rudder (5) is fixed on the vertical component of sampling pipe (2), and it is positioned at and the relative side of sampling mouth (3).
3. sandstorm sampling thief according to claim 1, it is characterized in that: whirligig comprises gland nut (6), O-ring seal (7), filter cylinder gland (8), bearing (9), sealing gasket (10), O-ring seal (11) and gland nut (12), has convex shoulder (13) on the filter cylinder gland (8); O-ring seal (7) is positioned between the lower surface of convex shoulder (13) of the upper surface of filter cylinder overcoat (1) and filter cylinder gland (8), the internal thread of gland nut (6) cooperates with external thread on filter cylinder overcoat (1) outer surface of upper, and gland nut (6) is pressed on the upper surface of convex shoulder (13) of filter cylinder gland (8); The outside surface of the outlet side (4) of sampling pipe (2) is installed on the inner ring of bearing (9), and the inside surface of filter cylinder gland (8) is installed on the outer ring of bearing (9); External thread on the outside surface on the internal thread of gland nut (12) and filter cylinder gland (8) top cooperates, sealing gasket (10) is positioned between the upper surface and gland nut (12) of filter cylinder gland (8), and the inner edge of sealing gasket (10) contacts with the outside surface of the outlet side (4) of sampling pipe (2); Gland nut has ring groove on (12), and O-ring seal (11) is placed in this ring groove, and the inner edge of O-ring seal (11) contacts with the outside surface of the outlet side (4) of sampling pipe (2).
4. sandstorm sampling thief according to claim 1 is characterized in that: have filter cylinder carriage (14) in the filter cylinder overcoat (1), the suitable for reading of filter cylinder carriage (14) is fixed on the filter cylinder overcoat (1), has some through holes (15) on the filter cylinder carriage (14).
5. sandstorm sampling thief according to claim 4 is characterized in that: through hole (15) is a circular hole, and goes up evenly distribution at filter cylinder carriage (14).
6. according to claim 1,2,3,4 or 5 described sandstorm sampling thiefs, it is characterized in that: main frame comprises flowmeter (16), aspiration pump (17), anemoscope (18) and control circuit (19); The air inlet of flowmeter (16) is communicated with filter cylinder overcoat (1), and the air outlet of flowmeter (16) is communicated with the air inlet of aspiration pump (17), and the signal output part of flowmeter (16) is connected with the input end of control circuit; The air velocity transducer (20) of anemoscope (18) stretches out the shell of main frame, and the output terminal of anemoscope (18) is connected with control circuit (19); The output terminal of control circuit (19) is connected with the motor (D) of aspiration pump (17).
7. sandstorm sampling thief according to claim 6 is characterized in that: control circuit (19) comprises A/D converter, driving circuit and single-chip microcomputer; The signal output part of flowmeter (16) is connected with the input end of A/D converter, and the output terminal of A/D converter is connected with the I/O mouth of single-chip microcomputer; The output terminal of anemoscope (18) is connected with the I/O mouth of single-chip microcomputer; The I/O mouth of single-chip microcomputer is connected with driving circuit, and the output terminal of driving circuit is connected with the motor (D) of aspiration pump (17).
8. sandstorm sampling thief according to claim 7 is characterized in that: driving circuit comprises photoelectrical coupler (GD), controllable silicon (T), resistance (R1), resistance (R2), resistance (R3), resistance (R4), electric capacity (C1) and electric capacity (C2); Photoelectrical coupler (GD) adopts MOC3021, and its (1) pin is connected with the I/O mouth of single-chip microcomputer with (2) pin, and its (6) pin is connected with an end of resistance (R1) and the control utmost point of controllable silicon (T), and the other end of resistance (R1) is connected with (a) of AC power end; (4) pin of photoelectrical coupler (GD) is connected with an end of resistance (R2), the other end of resistance (R2) is connected with an end of resistance (R3) and an end of electric capacity (C1), the other end of electric capacity (C1) is connected with (a) of AC power end, and the other end of resistance (R3) is connected with an end of the motor (D) of aspiration pump (17); The 1st anode of controllable silicon (T) is connected with (a) of AC power end, and the 2nd anode is connected with an end of the motor (D) of aspiration pump (17); Electric capacity (C2) is connected with resistance (R4), and an end of this series circuit is connected with (a) of AC power end, and the other end is connected with an end of the motor (D) of aspiration pump (17); The other end of the motor (D) of aspiration pump (17) is connected with (b) of AC power end.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 01233842 CN2489321Y (en) | 2001-07-29 | 2001-07-29 | Sampler for sand devil |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 01233842 CN2489321Y (en) | 2001-07-29 | 2001-07-29 | Sampler for sand devil |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN2489321Y true CN2489321Y (en) | 2002-05-01 |
Family
ID=33647542
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 01233842 Expired - Fee Related CN2489321Y (en) | 2001-07-29 | 2001-07-29 | Sampler for sand devil |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN2489321Y (en) |
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN100397065C (en) * | 2003-08-14 | 2008-06-25 | 中国科学院寒区旱区环境与工程研究所 | Fine sand level flux measuring device |
| CN106226023A (en) * | 2016-09-08 | 2016-12-14 | 甘肃省治沙研究所 | A kind of active automatic sand instrument |
| CN107478538A (en) * | 2017-10-20 | 2017-12-15 | 国家电网公司 | A kind of sandy environment concentration measuring apparatus and its application method |
| CN107576537A (en) * | 2017-10-20 | 2018-01-12 | 重庆美高科技有限公司 | Pre- trap for dust sampling |
| CN107817138A (en) * | 2017-10-20 | 2018-03-20 | 重庆美高科技有限公司 | A kind of device for trapping dust |
-
2001
- 2001-07-29 CN CN 01233842 patent/CN2489321Y/en not_active Expired - Fee Related
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN100397065C (en) * | 2003-08-14 | 2008-06-25 | 中国科学院寒区旱区环境与工程研究所 | Fine sand level flux measuring device |
| CN106226023A (en) * | 2016-09-08 | 2016-12-14 | 甘肃省治沙研究所 | A kind of active automatic sand instrument |
| CN107478538A (en) * | 2017-10-20 | 2017-12-15 | 国家电网公司 | A kind of sandy environment concentration measuring apparatus and its application method |
| CN107576537A (en) * | 2017-10-20 | 2018-01-12 | 重庆美高科技有限公司 | Pre- trap for dust sampling |
| CN107817138A (en) * | 2017-10-20 | 2018-03-20 | 重庆美高科技有限公司 | A kind of device for trapping dust |
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|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| C19 | Lapse of patent right due to non-payment of the annual fee | ||
| CF01 | Termination of patent right due to non-payment of annual fee |