CN204346863U - One has original signal and increases powerful AC charge method dust gauge - Google Patents
One has original signal and increases powerful AC charge method dust gauge Download PDFInfo
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- CN204346863U CN204346863U CN201420811591.6U CN201420811591U CN204346863U CN 204346863 U CN204346863 U CN 204346863U CN 201420811591 U CN201420811591 U CN 201420811591U CN 204346863 U CN204346863 U CN 204346863U
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Abstract
The utility model discloses one there is original signal to increase powerful AC charge method dust gauge, comprise upstream electrode, downstream electrode and the signal-processing board be connected with the signal output part of two electrodes, two electrodes are club shaped structure, be parallel to each other and be arranged in mounting seat perpendicular to pulverized coal channel, two electrodes all have two surface of contact contacted with dust-contained airflow, and be the structure that the spacing of two surface of contact is gradually large along the electrode cross-section front end in air current flow direction, rear end is arc structure, this electrode structure is conducive to the effect strengthening vortex street phenomenon, and can induction region be increased, when dust-contained airflow flows through upstream electrode, symmetrical vortex contrary in burble point S place's generation a pair rotation of boundary-layer, and downstream electrode is just in time in eddy region, to increase exchanges the raw signal strength of charge method dust gauge, the signal intensity of downstream electrode will much larger than upstream electrode signal intensity, add the signal of upstream electrode, the original signal of dust gauge is strengthened greatly.
Description
Technical field
The utility model relates to one to be had original signal and increases powerful AC charge method dust gauge.
Background technology
Along with the raising of coal mining intensity and Mechanization Level, while raising coal production, the dust concentration in dust-producing amount and mine operation place also improves greatly, and so highland dust concentration causes high risks to the healthy of operating personnel and mine safety production.Therefore, must monitor the dust concentration of Work places timely and effectively, dust concentration situation could be grasped better, carry out effective dedusting and depositing dust, reduce the dust concentration of Work places, play effect of crucial importance to guaranteeing personal safety and improving environmental quality.
Have studied the method for multiple measurement dust concentration at present both at home and abroad, as light scattering method, optical absorption method, electric charge induction method, supercritical ultrasonics technology, microwave method etc.Wherein, for the instrument using light scattering method principle, the cleanliness of photosensitive member surface directly determine the accuracy of measurement result, but are difficult to ensure the clean of light-emitting component and photo-sensitive cell and optical system in practical application.
The measuring principle of electric charge induction method is as follows: the dust produced in coal production, many in process of production namely with electric charge (during as mechanical rock drilling coal cutting, due to the strong friction of drill bit and pick and rock, coal body and the grit produced), because solid particle and wall friction are with a certain amount of static charge in this external motion process.By the metal electrode that is placed in flow field and charged particle mutual induction, surface of metal electrode produces equivalent heterocharge, along with the movement of particle and the change of concentration, cause the induced charge on metal electrode also in continuous change, variation sensing electricity reflects the size of dust concentration to a certain extent.AC charge method dust gauge utilizes the interchange turbulent noise signal in its electrode induction dust movement process, and the mass concentration of this kind of signal and dust is proportional.This kind of method is measured dust and is avoided complicated optical system, avoids dust gauge laying dust to the impact of measuring.But because its original signal is more weak, the raw signal strength how strengthening AC charge method dust gauge becomes difficult point and the emphasis of its design.
Utility model content
The purpose of this utility model is to provide one to be had original signal and increases powerful AC charge method dust gauge, to solve the problem that when existing charge method dust gauge uses, original signal is more weak.
In order to realize above object, the technical scheme that the utility model adopts is: one has original signal and increases powerful AC charge method dust gauge, the signal-processing board comprising upstream electrode, downstream electrode and be connected with the signal output part of two electrodes, two electrodes are club shaped structure, be parallel to each other and be arranged in mounting seat perpendicular to pulverized coal channel, two electrodes all have two surface of contact for contacting with dust-contained airflow, and be the structure that the spacing of two surface of contact is gradually large along the electrode cross-section front end in air current flow direction, rear end is arc structure.
The front end of two electrode cross-sections is triangular structure, and rear end is semicircular structure.
The utility model has that electrode that original signal increases powerful AC charge method dust gauge adopts that a kind of front end two surface of contact is gradually far away and rear end is the structure of arc-shaped, this structure is conducive to the effect strengthening vortex street phenomenon, and can induction region be increased, former and later two electrodes strengthen induction region, when dust-contained airflow flows through upstream electrode, fluid micellar after upstream electrode in boundary-layer is subject to larger retardance, just contrary in burble point S place's generation a pair rotation of boundary-layer symmetrical vortex, and downstream electrode is just in time in eddy region, in above-mentioned eddy region, the vortex of air-flow and disturbance add the mutual frictional impact of dust, increase dust carried charge, and then the raw signal strength of charge method dust gauge of increasing exchanges, thus the signal intensity of downstream electrode will much larger than upstream electrode signal intensity, add the signal of upstream electrode, the induction region of dust gauge is increased greatly, original signal increases greatly.
Accompanying drawing explanation
Fig. 1 is the structure principle chart of the utility model AC charge method dust gauge;
Fig. 2 is the application principle figure of the utility model AC charge method dust gauge.
Embodiment
Below in conjunction with accompanying drawing and specific embodiment, the utility model is described further.
Be illustrated in figure 1 the utility model and there is the structure principle chart that original signal increases powerful AC charge method dust gauge, as seen from the figure, this dust gauge comprises upstream electrode 1, downstream electrode 3 and the signal-processing board be connected with the signal output part of two electrodes, upstream electrode 1, downstream electrode 3 is club shaped structure, be parallel to each other and be arranged in mounting seat 2 perpendicular to pulverized coal channel, upstream electrode, the structure of downstream electrode is identical, all there are two surface of contact 11 and 12 for contacting with dust-contained airflow, and be the structure that the spacing of two surface of contact is gradually large along the electrode cross-section front end in air current flow direction, rear end is arc structure.
In the present embodiment, the front end of two electrode 1,3 xsects is triangular structure, and rear end is semicircular structure.
Principle of work of the present utility model is as follows: the electrode structure of the utility model dust gauge is conducive to the effect strengthening vortex street phenomenon, and can induction region be increased, former and later two electrodes strengthen induction region, specifically: when dust-contained airflow flows through upstream electrode 1, fluid micellar after upstream electrode 1 in boundary-layer is subject to larger retardance, as shown in Figure 2, and downstream electrode 3 is just in time in eddy region just contrary in burble point S place's generation a pair rotation of boundary-layer symmetrical vortex.In above-mentioned eddy region, the vortex of air-flow and disturbance add the mutual frictional impact of dust, increase dust carried charge, and then the raw signal strength of charge method dust gauge of increasing exchanges, thus the signal intensity of downstream electrode 3 will much larger than upstream electrode signal intensity, add the signal of upstream electrode 1, the induction region of dust gauge is increased greatly, and original signal increases greatly.
Above embodiment only understands core concept of the present utility model for helping; the utility model can not be limited with this; for those skilled in the art; every according to thought of the present utility model; the utility model is modified or equivalent replacement; any change done in specific embodiments and applications, all should be included within protection domain of the present utility model.
Claims (2)
1. one kind has original signal and increases powerful AC charge method dust gauge, the signal-processing board comprising upstream electrode, downstream electrode and be connected with the signal output part of two electrodes, two electrodes are club shaped structure, be parallel to each other and be arranged in mounting seat perpendicular to pulverized coal channel, it is characterized in that: two electrodes all have two surface of contact for contacting with dust-contained airflow, and be the structure that the spacing of two surface of contact is gradually large along the electrode cross-section front end in air current flow direction, rear end is arc structure.
2. according to claim 1 have original signal and increase powerful AC charge method dust gauge, it is characterized in that: the front end of two electrode cross-sections is triangular structure, and rear end is semicircular structure.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201420811591.6U CN204346863U (en) | 2014-12-18 | 2014-12-18 | One has original signal and increases powerful AC charge method dust gauge |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201420811591.6U CN204346863U (en) | 2014-12-18 | 2014-12-18 | One has original signal and increases powerful AC charge method dust gauge |
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| Publication Number | Publication Date |
|---|---|
| CN204346863U true CN204346863U (en) | 2015-05-20 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN201420811591.6U Active CN204346863U (en) | 2014-12-18 | 2014-12-18 | One has original signal and increases powerful AC charge method dust gauge |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107063958A (en) * | 2017-06-13 | 2017-08-18 | 白茂森 | A kind of dust concentration on-line measurement device based on electrostatic method |
| CN109932291A (en) * | 2019-01-29 | 2019-06-25 | 黑龙江科技大学 | A kind of electrostatic induction dust concentration detection device based on vortex street |
-
2014
- 2014-12-18 CN CN201420811591.6U patent/CN204346863U/en active Active
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107063958A (en) * | 2017-06-13 | 2017-08-18 | 白茂森 | A kind of dust concentration on-line measurement device based on electrostatic method |
| CN109932291A (en) * | 2019-01-29 | 2019-06-25 | 黑龙江科技大学 | A kind of electrostatic induction dust concentration detection device based on vortex street |
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| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CP01 | Change in the name or title of a patent holder | ||
| CP01 | Change in the name or title of a patent holder |
Address after: 450001 Henan city of Zhengzhou province high tech Industrial Development Zone Long Chun Road No. 10 Patentee after: Power Polytron Technologies Inc Address before: 450001 Henan city of Zhengzhou province high tech Industrial Development Zone Long Chun Road No. 10 Patentee before: Zhengzhou GL Tech Company |