CN217277683U - Calibrating device of direct-reading dust concentration measuring instrument - Google Patents
Calibrating device of direct-reading dust concentration measuring instrument Download PDFInfo
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- CN217277683U CN217277683U CN202123187799.4U CN202123187799U CN217277683U CN 217277683 U CN217277683 U CN 217277683U CN 202123187799 U CN202123187799 U CN 202123187799U CN 217277683 U CN217277683 U CN 217277683U
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Abstract
The utility model belongs to the technical field of instrument measurement and detection, and relates to a calibrating device of a direct-reading dust concentration measuring instrument, which comprises a dust generating system, a mixing system and a detection control system; the dust generating system comprises a box body, and a dust generator and a fan which are respectively arranged outside the box body; an air inlet, a dust inlet and a mixture outlet which are communicated with the interior of the box body are respectively arranged on the box body from bottom to top; the fan is communicated with the air inlet; the dust generator is communicated with the dust inlet; the mixture outlet is communicated with the blending system; and the detection control system is respectively connected with the dust generator, the fan and the blending system. The utility model has the advantages of simple operation, easy control, uniform distribution of dust concentration, long-time stability, little pollution and environmental protection.
Description
Technical Field
The utility model belongs to the technical field of the instrument measurement detects, a calibrating installation of direct-reading dust concentration measuring apparatu is related to, is particularly useful for low concentration dust concentration measuring apparatu examination.
Background
At present, dust sampling methods are adopted for dust measurement in various occasions, and dust samplers are used for measuring dust concentration, and the measuring method has the defects that the sampling time is long, the dust concentration under the current environmental conditions cannot be obtained in real time, and the dust concentration during sampling needs to be obtained by analyzing sampling results under laboratory conditions; in recent years, with the development of science and technology, a dust concentration sensor based on a laser principle is developed, and a direct-reading dust concentration measuring instrument is produced, wherein the instrument has the greatest advantage of being capable of displaying the dust concentration of the current environmental condition in real time and intuitively, and is widely applied to operation places in industries such as mining, metallurgy, petrifaction and building materials at present.
The direct-reading dust concentration measuring instrument is directly used in the aspects of environmental protection and safety protection as a measuring instrument, belongs to a compulsory verification measuring instrument, and has no corresponding basis for the metering work of the direct-reading dust concentration measuring instrument due to the fact that no regulation/standard in the verification/calibration aspect of the measuring instrument exists in China for a long time, and the metering verification and calibration work cannot be carried out, so that the direct-reading dust concentration measuring instrument can only test the flow accuracy single parameter by referring to the national metering verification regulation of a dust sampler by adopting a gas flow standard device, but the dust concentration does not obtain an effective quantity value and a source actually, so that the direct-reading dust concentration measuring instrument has great potential safety hazard in use; with the intensive research on the calibration technology, a calibration device for a direct-reading dust concentration measuring instrument has been developed, which can be used for calibrating the measuring instrument, but has the following problems: (1) when the dust concentration is small, the dust can not be fed uniformly and continuously, so that the dust concentration is not uniform; (2) the dust concentration is manually adjusted, so that the operation is inconvenient; (3) when gas and dust are mixed, the wind speed is inconvenient to control, and the gas flow cannot reach the range specified by the industrial standard, so that the dust concentration is uneven and cannot be kept stable for a long time; (4) after the detection of the existing detection device is finished, dust of a working medium is directly discharged, so that the environment is polluted.
SUMMERY OF THE UTILITY MODEL
To the technical problem that current calibrating installation exists, the utility model provides a calibrating installation of direct-reading dust concentration measuring apparatu has simple operation, easily control, dust concentration evenly distributed and long-time remain stable, pollute little, the advantage of environmental protection.
In order to realize the purpose, the utility model discloses a technical scheme is:
a calibrating device of a direct-reading dust concentration measuring instrument comprises a dust generating system, a blending system and a detection control system; the dust generating system comprises a box body, a dust generator and a fan, wherein the dust generator and the fan are respectively arranged outside the box body; an air inlet, a dust inlet and a mixture outlet which are communicated with the interior of the box body are respectively arranged on the box body from bottom to top; the fan is communicated with the air inlet; the dust generator is communicated with the dust inlet; the mixture outlet is communicated with the blending system; and the detection control system is respectively connected with the dust generator, the fan and the blending system.
Further, a first high-efficiency filter and a flowmeter are arranged in the box body from bottom to top; the flowmeter is positioned below the dust inlet and is connected with the detection control system; the fan is communicated with the mixture outlet through an air inlet, a first high-efficiency filter and a flowmeter in sequence.
Furthermore, the calibrating device of the direct-reading dust concentration measuring instrument further comprises a connecting pipeline arranged between the mixture outlet and the blending system.
Furthermore, the connecting pipeline comprises a circular pipeline and a reducing pipeline which are communicated with each other; the circular pipeline is communicated with the mixture outlet; the reducing pipeline is communicated with the blending system.
Further, the blending system comprises a frame, and a static pressure box and a verification working cabin which are arranged on the frame from top to bottom; the reducing pipeline is communicated with the static pressure box; the static pressure box is communicated with the verification working cabin; the static pressure box is connected with a detection control system.
Furthermore, the blending system also comprises a stainless steel net arranged between the static pressure box and the verification working cabin.
Furthermore, the blending system also comprises a mesh plate arranged on the bottom surface of the verification work cabin.
Furthermore, the meshes on the meshes of the mesh plate are oval.
Furthermore, the blending system also comprises a second high-efficiency filter which is arranged on the frame and positioned below the verification working cabin.
Further, the detection control system comprises a power supply, and a control unit and a display which are respectively connected with the power supply; the control unit is electrically connected with the dust generator, the fan, the flow meter and the static pressure box respectively.
The utility model has the advantages that:
1. the utility model discloses in, adopt the fan to provide the big air of air flow, dust generator provides the dust, and the dust is blown in the mixing system along with the air, and the air dilutes the high concentration dust, satisfies the detection range of direct-reading formula dust concentration measuring apparatu, under the little condition of dust concentration, can guarantee even continuous feed, and concentration misce bene.
2. In the utility model, the air for diluting the dust is detected by the flowmeter and fed back to the detection control system, and is regulated and controlled by the detection control system, so that the operation is convenient; the air flow value can be continuously and stably controlled, the dust concentration cannot change, the stability can be kept for a long time, and the smooth verification is ensured.
3. The utility model discloses in, the fan provides the air that the air flow is big, and when getting into the box, can filter the dust in the air earlier through a high efficiency filter, reduces the influence that the unstable dust that carries in the air brought for the stability of dust concentration can be controlled from the source.
4. In the utility model, the connecting pipeline comprises a circular pipeline and a reducing pipeline which are communicated; the circular pipeline is communicated with the mixture outlet; the reducing pipeline is communicated with the mixing system, dust and air are mixed through the reducing pipeline, and the proper small pipe diameter is used for diluting and mixing high-concentration dust within a certain length, so that the dust is fully mixed and uniformly mixed; meanwhile, the size of the border pipeline is matched with the side length of the static pressure box, so that the static pressure box is filled with dust, and the accuracy of a detection result is ensured.
5. In the utility model, a stainless steel mesh is arranged between the static pressure box and the verification working cabin, so that the dust air flow after mixing uniformly flows downwards to form laminar flow; the design of the grid spacing of the stainless steel net ensures that dust cannot be intercepted, but ensures that air flow uniformly flows to the whole verification working cabin, and the working plane of the verification working cabin is filled with dust with uniform concentration; furthermore, the working plane of the verification working chamber must meet the requirement of the vertical downward flow direction of the air flow, and simultaneously must bear the weight of several dust concentration testers, so that an elliptical mesh plate is arranged on the bottom surface (namely on the working plane) of the verification working chamber.
6. The utility model discloses after the detection is accomplished, the air current passes in oval mesh board gets into second high efficiency filter, detaches the dust in the air current for the dust that discharges the air has obtained effectual control, avoids producing the pollution, the environmental protection to the environment.
Drawings
Fig. 1 is a schematic front view of the calibrating apparatus provided by the present invention;
FIG. 2 is a left side schematic view of FIG. 1;
wherein:
1-a dust generator; 2-dust-generating connecting pipe; 3-a first high efficiency filter; 4-a flow meter; 5, a circular pipeline; 6, a variable diameter pipeline; 7-detecting the control system; 8-static pressure box; 9-stainless steel mesh; 10-detecting a working cabin; 11-mesh plate; 12-a second high efficiency filter; 13-a fan; 14-frame.
Detailed Description
The present invention will now be described in detail with reference to the accompanying drawings and examples.
The utility model provides a calibrating installation, its theory of operation is: and (3) generating quantitative and high-concentration standard dust, diluting the high-concentration dust by adding clean air, controlling the dust concentration to be within the concentration range required by the dust concentration measuring instrument, uniformly mixing, and introducing into the verification working cabin 10 to calibrate the dust concentration measuring instrument so as to finish verification.
Example 1
Referring to fig. 1 and fig. 2, the calibrating apparatus of the direct-reading dust concentration measuring instrument provided in this embodiment includes a dust generating system, a blending system, and a detection control system 7.
The dust generating system provided by the embodiment comprises a box body, a dust generator 1 and a fan 13, wherein the dust generator 1 and the fan 13 are respectively arranged outside the box body; an air inlet, a dust inlet and a mixture outlet which are communicated with the interior of the box body are respectively arranged on the box body from bottom to top; the fan 13 is communicated with the air inlet; the dust generator 1 is communicated with the dust inlet; the mixture outlet is communicated with the mixing system; the detection control system 7 is respectively connected with the dust generator 1, the fan 13 and the blending system.
Specifically, the box is a rectangular closed box with a conical top end, an air inlet is formed in the bottom of the box, a dust inlet is formed in the side wall of the conical structure of the box, and a mixture outlet is formed in the top end of the box.
The dust generator 1 is a dust generating instrument of the brand of PLS corporation, uk.
The fan 13 is purchased from a domestic fan, and the air volume is 100-400 m 3 H is the ratio of the total weight of the catalyst to the total weight of the catalyst. The apparatus was equipped with two nozzles, D50 and D70. And after the required air volume is set, opening or closing the corresponding nozzle of the equipment according to the prompt displayed by the software prompt box or the nozzle selection column. Air volume range: d50: 100-250m 3 /h；D70：250-500m 3 /h；D50/D70：500-800m 3 /h；
During the implementation, the fan that has certain pressure head and amount of wind is adopted, can provide the air that the air flow is big, and the air that introduces through the fan removes the dust of diluting the high concentration, guarantees that dust concentration is on the working plane of examination work cabin according to the concentration evenly distributed that requires, this is because the high concentration dust dilutes the back, at certain extent, easily adjusts dust generator, convenient operation solves the inconvenient shortcoming of actual operation.
The blending system provided by the embodiment comprises a frame 14, and a static pressure box 8 and a verification working cabin 10 which are arranged on the frame 14 from top to bottom; the static pressure box 8 is communicated with a verification working cabin 10, and the static pressure box 8 is connected with the detection control system 7. The mixture outlet is communicated with the static pressure box 8.
The detection control system 7 provided by the embodiment comprises a power supply, a control unit and a display, wherein the control unit and the display are respectively connected with the power supply; the control unit is connected with the dust generator 1, the fan 13, the flow meter 4 and the static pressure box 8 respectively.
The control unit is a product sold in the market at present, can receive and transmit the data collected in the device, and calculates to obtain the error of the verification result. The display is a computer, and the computer is provided with the determination software for displaying the data collected in the verification process and calculating the comparison result, so that the data transformation in the verification process can be monitored in real time conveniently. The power supply is an existing product, and the voltage of the power supply is 380V or 220V; the power frequency was (50. + -.1) Hz.
In implementation, the frame 14 is a rectangular frame structure, an aluminum profile is adopted, rollers are arranged at the bottom of the frame, the static pressure box 8 is arranged at the top of the frame, the verification working chamber 10 is arranged below the static pressure box 8, the area of the verification working chamber 10 is 1 square meter, glass is arranged on the verification working chamber 10 to form a closed cavity, and a cabin door is arranged, so that a dust concentration measuring instrument to be verified can be conveniently placed in the verification working chamber 10; the bottom surface in the verification working cabin 10 is a working plane, a direct-reading low-concentration dust concentration instrument to be verified is arranged on the detection working cabin 10, air flow which is sent from a mixture outlet and meets the dust concentration requirement is uniform through the static pressure box 8, then the air flow flows downwards and enters the verification working cabin 10, the uniform dust concentration in the plane of the verification working cabin 10 is guaranteed, then the direct-reading low-concentration dust concentration instrument detects the dust concentration in the verification working cabin 10 and transmits the dust concentration to the detection control system 7, the detection control system 7 calculates the indication error of the dust concentration instrument according to the display results of sampling in the mixing box of standard dust and the detected dust concentration instrument, and verification work is finished.
Example 2
Further, in order to reduce the influence that unstable dust brought in the air, be provided with first high efficiency filter 3 in the box inside, filter the dust in the air through first high efficiency filter 3 for dust concentration's stability has obtained the control in the source, and the dust dilutes and the misce bene with the clean air who adds, controls dust concentration through clean air for waiting to examine the required concentration of dust measuring apparatu, guarantees the stability of dust concentration in the air current, and it is more accurate to examine and determine.
Example 3
Further, a flow meter 4 is arranged above the first high-efficiency filter 3 and below the dust inlet, the flow meter 4 is connected with the detection control system 7, and the fan 13 is communicated with the mixture outlet through the air inlet, the first high-efficiency filter 3 and the flow meter 4 in sequence.
In the embodiment, the flow meter is an air flow meter, and mainly functions to meter the amount of air introduced into the box body, and the air amount is displayed and automatically adjusted through the detection control system 7, so that the air flow meter is continuously controlled to be at a required air flow value within 24 hours without change, and the problem that the dust concentration changes after long-time working is solved.
Example 4
In order to ensure uniformity of the gas flow. The calibrating device of the direct-reading dust concentration measuring instrument further comprises a connecting pipeline arranged between the mixture outlet and the blending system.
In this embodiment, the connecting pipeline includes a circular pipeline 5 and a variable diameter pipeline 6 which are communicated with each other; the circular pipeline 5 is communicated with the mixture outlet; the reducing pipeline 6 is communicated with the static pressure box 8.
Further, the stainless steel net 9 is arranged between the static pressure box 8 and the verification working chamber 10, because the air flow is uniformly downward from the static pressure box 8 to the verification working chamber 10, and the air flow can form laminar flow after the stainless steel net 9 is added, so that the dust concentration in the working plane flowing to the verification working chamber 10 is uniform. During implementation, the grid spacing of the stainless steel net 9 has certain requirements, so that dust cannot be intercepted, and air flow can uniformly flow to the whole verification working cabin 10.
Example 5
In the examination work cabin 10, its working area is 1 square meter, the direct-reading dust concentration meter that waits to examine and determine is arranged in the working plane of examination work cabin 10 bottom surface in, the working plane that gets into examination work cabin 10 from static pressure case 8 inflow is perpendicular downwards to bear the perpendicular decurrent power of air current, still must bear the weight of several examination dust concentration testers of waiting to examine simultaneously, it is impaired to avoid examining work cabin 10 working plane, or appear unstablely, set up mesh board 11 on examination work cabin 10 bottom surface, during the implementation, mesh board 11 is certain thickness, and the higher authority is provided with the board of oval mesh.
Example 6
Further, the blending system further comprises a second high efficiency filter 12 disposed on the frame 14 and below the certification cabin 10. The emission of dust adopts the second high efficiency filter to filter the back, just directly discharges in the air, avoids the dust of certain concentration directly to discharge and causes the serious influence to the environment in the air for the dust of discharging the air obtains effectual control, pollutes for the environmental protection.
The utility model provides a calibrating installation, its working process is: placing a dust concentration measuring instrument to be calibrated on a working surface in the verification working cabin 10, and closing the cabin door to form a closed space; the device begins work, dust generator 1 takes place the dust concentration of ration and high concentration, add clean air through fan 13 and dilute the high concentration dust, control dust concentration is in the required concentration range of dust concentration measuring apparatu, and after the misce bene, send into static pressure case 8 and verification work cabin 10 in through the reducing pipeline, dust concentration measuring apparatu measures the dust concentration in the verification work cabin 10, and compare with the entering verification work cabin 10 dust concentration that detects control system 7, and calculate the error through detection control system 7, use for this and accomplish the demarcation to dust concentration measuring apparatu.
Claims (10)
1. The utility model provides a calibrating installation of direct-reading dust concentration measurement appearance which characterized in that: comprises a dust generating system, a blending system and a detection control system (7); the dust generating system comprises a box body, and a dust generator (1) and a fan (13) which are respectively arranged outside the box body; an air inlet, a dust inlet and a mixture outlet which are communicated with the interior of the box body are respectively arranged on the box body from bottom to top; the fan (13) is communicated with the air inlet; the dust generator (1) is communicated with the dust inlet; the mixture outlet is communicated with the blending system; and the detection control system (7) is respectively connected with the dust generator (1), the fan (13) and the blending system.
2. The calibrating apparatus for direct-reading dust concentration measuring instrument according to claim 1, wherein: a first high-efficiency filter (3) and a flowmeter (4) are arranged in the box body from bottom to top; the flowmeter (4) is positioned below the dust inlet and is connected with the detection control system (7); the fan (13) is communicated with the mixture outlet through an air inlet, the first high-efficiency filter (3) and the flowmeter (4) in sequence.
3. The calibrating apparatus for direct-reading dust concentration measuring instrument according to claim 1 or 2, wherein: the calibrating device of the direct-reading dust concentration measuring instrument further comprises a connecting pipeline arranged between the mixture outlet and the blending system.
4. The calibrating apparatus for direct-reading dust concentration measuring instrument according to claim 3, wherein: the connecting pipeline comprises a circular pipeline (5) and a reducing pipeline (6) which are communicated; the circular pipeline (5) is communicated with the mixture outlet; the reducing pipeline (6) is communicated with the blending system.
5. The calibrating apparatus for direct-reading dust concentration measuring instrument according to claim 4, wherein: the blending system comprises a frame (14), and a static pressure box (8) and a verification working cabin (10) which are arranged on the frame (14) from top to bottom; the reducing pipeline (6) is communicated with the static pressure box (8); the static pressure box (8) is communicated with the verification working cabin (10); the static pressure box (8) is connected with the detection control system (7).
6. The calibrating apparatus for direct-reading dust concentration measuring instrument according to claim 5, wherein: the blending system also comprises a stainless steel net (9) arranged between the static pressure box (8) and the verification working cabin (10).
7. The calibrating apparatus for direct-reading dust concentration measuring instrument according to claim 6, wherein: the blending system also comprises a mesh plate (11) arranged on the bottom surface of the verification working cabin (10).
8. The calibrating apparatus for direct-reading dust concentration measuring instrument according to claim 7, wherein: the meshes on the mesh plate (11) are oval.
9. The calibrating apparatus for direct-reading dust concentration measuring instrument according to claim 8, wherein: the blending system also comprises a second high-efficiency filter (12) which is arranged on the frame (14) and is positioned below the verification working cabin (10).
10. The calibrating apparatus for direct-reading dust concentration measuring instrument according to claim 9, wherein: the detection control system (7) comprises a power supply, a control unit and a display, wherein the control unit and the display are respectively connected with the power supply; the control unit is respectively electrically connected with the dust generator (1), the fan (13), the flowmeter (4) and the static pressure box (8).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202123187799.4U CN217277683U (en) | 2021-12-17 | 2021-12-17 | Calibrating device of direct-reading dust concentration measuring instrument |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202123187799.4U CN217277683U (en) | 2021-12-17 | 2021-12-17 | Calibrating device of direct-reading dust concentration measuring instrument |
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| Publication Number | Publication Date |
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| CN217277683U true CN217277683U (en) | 2022-08-23 |
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| CN202123187799.4U Active CN217277683U (en) | 2021-12-17 | 2021-12-17 | Calibrating device of direct-reading dust concentration measuring instrument |
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2021
- 2021-12-17 CN CN202123187799.4U patent/CN217277683U/en active Active
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