CN216309722U

CN216309722U - Particulate matter concentration detection device

Info

Publication number: CN216309722U
Application number: CN202122764488.3U
Authority: CN
Inventors: 刘朋刚; 李淑华; 陈康宁; 杨晓明; 孟繁杰; 刘文芝; 刘霞; 安瑞君; 冯庆浩
Original assignee: Qingdao Minghua Electronic Instrument Co ltd
Current assignee: Qingdao Minghua Electronic Instrument Co ltd
Priority date: 2021-11-12
Filing date: 2021-11-12
Publication date: 2022-04-15
Anticipated expiration: 2031-11-12

Abstract

The utility model discloses a particulate matter concentration detection device, which comprises a conveying component, a sampling component and a detection component, wherein the conveying component can drive a sampler to move in a single direction along a first direction to sequentially reach a first position, a second position and a third position, wherein: in the first position and the third position, the sampler is coupleable to the detection assembly; in the second position, the sampler can be coupled to the sampling component. This application is when using, and the one-way motion is done along first direction to the sample thief, has avoided positioning deviation, the sample thief damage that sample thief reciprocating motion leads to, sample thief adhesion scheduling problem to conveying assembly need not complicated rotating-structure, has improved concentration measurement's accuracy.

Description

Particulate matter concentration detection device

Technical Field

The utility model relates to the technical field of particulate matter concentration detection, in particular to a particulate matter concentration detection device.

Background

At present, a particle concentration tester adopts a beta ray absorption method principle, a motor drives a paper tape to reciprocate, a traditional detection device adopts a set of detector and a radiation source component as a detection unit, and the working process is as follows: during sampling, the detector and the radiation source assembly detect the concentration of a blank paper tape firstly, the motor drives the paper tape to move to the air inlet structure to collect a sample, the motor rotates reversely to drive the paper tape to move to the detector position again for inspection, after sampling is finished, the paper tape moves to the positions of the detector and the radiation source again to measure a final value, and the concentration of particulate matters is calculated. The method has the defects that the paper tape needs to move back and forth in a measurement period to measure an initial value and a final value, the paper tape needs to move back and forth in a set of complex transmission structure, and the problems of inaccurate paper tape positioning, paper tape damage, paper tape adhesion, transmission faults and the like easily occur.

SUMMERY OF THE UTILITY MODEL

The utility model aims to overcome the defects of the prior art and provides a particulate matter concentration detection device.

The purpose of the utility model is realized by the following technical scheme: the utility model provides a particulate matter concentration detection device, includes conveyor components, sampling subassembly and determine module conveyor components is last to be provided with the condition of sample thief, conveyor components can drive the sample thief along first direction one way movement in order to arrive primary importance, second place and third place in proper order, wherein: in the first position and the third position, the sampler is coupleable to the detection assembly; in the second position, the sampler can be coupled to the sampling component.

Preferably, the detection assembly comprises a first detection part located at a first side of the sampling assembly and a second detection part located at a second side of the sampling assembly, wherein the sampler and the sampling assembly are coupled to each other with the sampler located below the sampling assembly.

Preferably, the first and second detecting parts each include a probe and a radiation source, and the sampler and the sampling assembly are coupled to each other with the sampler positioned between the probe and the radiation source.

Preferably, the first detection part can perform first detection on the sampler under the condition that the conveying assembly drives the sampler to move to the first position; the sampler can sample the sampling assembly under the condition that the conveying assembly drives the sampler to move to the second position; under the condition that the conveying assembly drives the sampler to move to the third position, the second detection part can perform second detection on the sampler.

Preferably, the conveying assembly comprises a paper collecting wheel positioned on the first side and a paper placing wheel positioned on the second side, wherein a plurality of guide rollers are arranged on the first side and the second side.

Preferably, the particulate matter concentration detection device further comprises a support table, the radioactive source is arranged in the support table, and the detector is arranged above the support table.

Preferably, an air suction channel is arranged in the support table and located below the sampling assembly, and the air suction channel can be communicated with an air suction pump.

Preferably, the sampling assembly includes a sampling channel and a flow controller in communication with the sampling channel.

Preferably, the sampling assembly further comprises a dilution gas flow meter, a gas inlet and a dryer, the gas inlet being in communication with the flow controller via the dryer, the flow controller being in communication with the dilution gas flow meter.

Preferably, the sampling assembly further comprises a diluter heater and a sampling nozzle, the diluted gas flow meter is communicated with the sampling nozzle through the diluter heater, and the sampling nozzle is communicated with the sampling channel.

The utility model has the following advantages:

(1) this application is when using, and the one-way motion is done along first direction to the sample thief, has avoided positioning deviation, the sample thief damage that sample thief reciprocating motion leads to, sample thief adhesion scheduling problem to conveying assembly need not complicated rotating-structure, has improved concentration measurement's accuracy.

(2) The air pump can be used for pumping air to the air pumping channel, so that the negative pressure area exists in the air pumping channel, the discharged gas in the sampling assembly can be enabled to flow towards the sampler, and the sampling efficiency is improved.

Drawings

The objects and advantages of the present invention will be understood by the following detailed description of the preferred embodiments of the utility model, taken in conjunction with the accompanying drawings, in which:

FIG. 1 is a schematic view of a preferred apparatus for detecting particulate matter concentration according to the present invention;

fig. 2 is a schematic structural diagram of a preferred particulate matter concentration detection apparatus according to the present invention.

Detailed Description

The utility model will be further described with reference to the accompanying drawings, without limiting the scope of the utility model to the following:

as shown in fig. 1 and 2, the present application provides a particulate matter concentration detection apparatus including a conveyance assembly 1, a sampling assembly 2, and a detection assembly 3. Under the condition that conveying assembly 1 is provided with sample thief 4, conveying assembly 1 can drive sample thief 4 along first direction unidirectional motion in order to arrive first position, second position and third position in proper order, wherein: in the first and third positions, the sampler 4 can be coupled to the detection assembly 3; in the second position, the sampler 4 can be coupled to the sampling assembly 2. The sampler 4 may be a paper tape. This application is when using, and single direction motion is done along first direction to sample thief 4, has avoided positioning deviation, the sample thief damage that sample thief reciprocating motion leads to, sample thief adhesion scheduling problem to conveying component 1 need not complicated revolution mechanic, has improved concentration measurement's accuracy.

Preferably, the detection assembly 3 comprises a first detection portion 5 and a second detection portion 6. The first detecting portion 5 is located on the first side 2a of the sampling assembly 2, and the second detecting portion 6 is located on the second side 2b of the sampling assembly 2, wherein the first side 2a and the second side 2b of the sampling assembly 2 refer to two sides of the sampling assembly 2 along the conveying direction of the sampler 4, as shown in fig. 2, the first side 2a of the sampling assembly 2 is the left side of the sampling assembly 2, the second side 2b of the sampling assembly 2 is the right side of the sampling assembly 2, and the sampler 4 and the sampling assembly 2 are coupled to each other when the sampler 4 is located below the sampling assembly 2. The first and second detecting portions 5 and 6 each include a detector 7 and a radiation source 8, and the sampler 4 and the sampling assembly 2 are coupled to each other with the sampler 4 positioned between the detector 7 and the radiation source 8. When the sampler 4 is located directly below the sampling assembly 2, the distance between the sampler 4 and the sampling assembly 2 is sufficiently small so that the sampler 4 can sample the sampling assembly 2, thereby achieving coupling of the sampler 4 and the sampling assembly 2.

Preferably, the first detection part 5 can perform the first detection of the blank sample on the sampler 4 under the condition that the conveying assembly 1 drives the sampler 4 to move to the first position; under the condition that the conveying assembly 1 drives the sampler 4 to move to the second position, the sampler 4 can sample the particulate matters passing through the sampling assembly 2; under the condition that conveying component 1 drove sample thief 4 to remove to the third position, second detection portion 6 can carry out the second and detect sample thief 4, through above-mentioned process, can accomplish the detection of sample particulate matter concentration.

Preferably, the particulate matter concentration detection device further comprises a support table 12, the radiation source 8 is arranged in the support table 12, and the detector 7 is arranged above the support table 12. When conveying, the sampler 4 can be placed flatly on the support table 12, and further the sampler can be prevented from being damaged.

Specifically, the sampler 4 is a sampling paper tape, and the conveying assembly 1 comprises a paper collecting wheel 9 and a paper placing wheel 10, wherein the paper collecting wheel 9 and the paper placing wheel 10 are respectively arranged on the left side and the right side of the supporting table, and the conveying assembly further comprises a plurality of guide rollers 11. The sampler 4 is wound around the delivery wheel 9, the delivery wheel 10 and the guide roller 11 at the same time. The feed wheel 10 may be provided with a drive motor to effect active rotation of the feed wheel 10. The sampler 4 can be driven to move by the rotation of the paper collection wheel 9, the paper placing wheel 10 and the guide roller 11.

Preferably, the support table 12 is provided with a suction channel 13 located below the sampling assembly 2, and the suction channel 13 can be communicated with a suction pump 14. The air extracting pump 14 can extract air from the air extracting channel 13, so that a negative pressure area exists in the air extracting channel, the air exhausted from the sampling assembly 2 can be promoted to flow towards the sampler, and the sampling efficiency is improved.

Preferably, the sampling assembly 2 includes a sampling channel 15 and a flow controller 16, the flow controller 16 being in communication with the sampling channel 15. The flow controller 16 may be a flow valve, and the flow can be controlled by the opening degree of the flow valve.

Preferably, the sampling assembly 2 further comprises a dilution gas flow meter 17, a gas inlet 18 and a dryer 19. The gas inlet 18 is communicated with the flow controller 16 through the dryer 19, the flow controller 16 is communicated with the diluent gas flowmeter 17, and the diluent gas flowmeter 17 is used for detecting the flow of the diluent gas, so that the diluent gas is mixed in the sampling gas to prevent the pipeline from adsorbing excessive particles and affecting the measurement result. The dryer 19 may be a CMD film dryer so that moisture in the gas entering therein can be filtered out.

Preferably, the sampling assembly 2 further comprises a diluter heater 20 and a sampling nozzle 21, the diluter heater 20 is used for heating the dilution gas to prevent the dilution gas from being too low in temperature and generating condensed water when encountering a sample gas with a higher temperature to influence the measurement result, the dilution gas flowmeter 17 is communicated with the sampling nozzle 21 through the diluter heater 20, and the sampling nozzle 21 is communicated with the sampling channel 15.

The working principle of this application does: firstly, first detection portion carries out the first detection of blank appearance to sampler 4, conveying component 1 drives sampler 4 to move to the second position along first direction afterwards for sampler 4 is located sampling channel 15 under, afterwards, gas flows through sampling channel 15, particulate matter in the gas is gathered by sampler 4, and finally, conveying component 1 moves in first direction once more and moves to the third position in order to drive the sampler, makes second detection portion carry out the second detection to the sampler that has the particulate matter, thereby accomplishes the detection of sample. Because the sampler is in one-way motion along the first direction, the problems of positioning deviation, sampler damage, sampler adhesion and the like caused by the reciprocating motion of the sampler are avoided, the conveying assembly does not need a complex rotating structure, and the accuracy of concentration measurement is improved.

Finally, it should be noted that: although the present invention has been described in detail with reference to the foregoing embodiments, it will be apparent to those skilled in the art that changes may be made in the embodiments and/or equivalents thereof without departing from the spirit and scope of the utility model. Any modification, equivalent replacement, or improvement made within the spirit and principle of the present invention should be included in the protection scope of the present invention.

Claims

1. The utility model provides a particulate matter concentration detection device, includes conveyor components, sampling subassembly and determine module, its characterized in that, conveyor components can drive the sample thief along first direction one-way motion to the messenger the sample thief arrives primary importance, second place and third position in proper order, wherein:

in the first position and the third position, the sampler is coupleable to the detection assembly;

in the second position, the sampler can be coupled to the sampling component.

2. The particulate matter concentration detection apparatus according to claim 1, wherein the detection assembly includes a first detection portion located on a first side of a sampling assembly and a second detection portion located on a second side of the sampling assembly, wherein the sampler and the sampling assembly are coupled to each other with the sampler located below the sampling assembly.

3. The particulate matter concentration detection apparatus according to claim 2, wherein the first detection portion and the second detection portion each include a detector and a radiation source, and the sampler and the sampling assembly are coupled to each other with the sampler positioned between the detector and the radiation source.

4. The particulate matter concentration detection apparatus according to claim 2, wherein the first detection portion is capable of performing a first detection of the sampler in a case where the transportation assembly moves the sampler to the first position;

the sampler can sample the sampling assembly under the condition that the conveying assembly drives the sampler to move to the second position;

under the condition that the conveying assembly drives the sampler to move to the third position, the second detection part can perform second detection on the sampled sampler.

5. The particulate matter concentration detection apparatus according to claim 1, wherein the transport assembly includes a delivery wheel and a delivery wheel, and a plurality of guide rollers.

6. The apparatus according to claim 3, further comprising a support table, wherein the radiation source is disposed in the support table, and the detector is disposed above the support table.

7. The particulate matter concentration detection apparatus according to claim 6, wherein the sampling assembly includes an air suction passage provided below the support table and a sampling passage provided above the support table, the air suction passage communicating with an air suction pump.

8. The particulate matter concentration detection apparatus according to claim 1, wherein the sampling assembly further comprises a flow controller that communicates with the sampling passage.

9. The particulate matter concentration detecting apparatus according to claim 8, wherein the sampling assembly further comprises a dilution gas flow meter, a gas inlet, and a dryer, the gas inlet communicating with the flow controller via the dryer, the flow controller communicating with the dilution gas flow meter.

10. The particulate matter concentration detection apparatus according to claim 9, wherein the sampling assembly further comprises a diluter heater and a sampling nozzle, the dilution gas flow meter communicates with the sampling nozzle through the diluter heater, and the sampling nozzle communicates with the sampling passage.