CN112461865A - Section scanning type ash content instrument - Google Patents
Section scanning type ash content instrument Download PDFInfo
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- CN112461865A CN112461865A CN202011236765.7A CN202011236765A CN112461865A CN 112461865 A CN112461865 A CN 112461865A CN 202011236765 A CN202011236765 A CN 202011236765A CN 112461865 A CN112461865 A CN 112461865A
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N23/00—Investigating or analysing materials by the use of wave or particle radiation, e.g. X-rays or neutrons, not covered by groups G01N3/00 – G01N17/00, G01N21/00 or G01N22/00
- G01N23/02—Investigating or analysing materials by the use of wave or particle radiation, e.g. X-rays or neutrons, not covered by groups G01N3/00 – G01N17/00, G01N21/00 or G01N22/00 by transmitting the radiation through the material
- G01N23/06—Investigating or analysing materials by the use of wave or particle radiation, e.g. X-rays or neutrons, not covered by groups G01N3/00 – G01N17/00, G01N21/00 or G01N22/00 by transmitting the radiation through the material and measuring the absorption
- G01N23/12—Investigating or analysing materials by the use of wave or particle radiation, e.g. X-rays or neutrons, not covered by groups G01N3/00 – G01N17/00, G01N21/00 or G01N22/00 by transmitting the radiation through the material and measuring the absorption the material being a flowing fluid or a flowing granular solid
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N23/00—Investigating or analysing materials by the use of wave or particle radiation, e.g. X-rays or neutrons, not covered by groups G01N3/00 – G01N17/00, G01N21/00 or G01N22/00
- G01N23/02—Investigating or analysing materials by the use of wave or particle radiation, e.g. X-rays or neutrons, not covered by groups G01N3/00 – G01N17/00, G01N21/00 or G01N22/00 by transmitting the radiation through the material
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01T—MEASUREMENT OF NUCLEAR OR X-RADIATION
- G01T1/00—Measuring X-radiation, gamma radiation, corpuscular radiation, or cosmic radiation
- G01T1/16—Measuring radiation intensity
- G01T1/20—Measuring radiation intensity with scintillation detectors
- G01T1/202—Measuring radiation intensity with scintillation detectors the detector being a crystal
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N2223/00—Investigating materials by wave or particle radiation
- G01N2223/03—Investigating materials by wave or particle radiation by transmission
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N2223/00—Investigating materials by wave or particle radiation
- G01N2223/10—Different kinds of radiation or particles
- G01N2223/101—Different kinds of radiation or particles electromagnetic radiation
- G01N2223/1013—Different kinds of radiation or particles electromagnetic radiation gamma
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N2223/00—Investigating materials by wave or particle radiation
- G01N2223/50—Detectors
- G01N2223/505—Detectors scintillation
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N2223/00—Investigating materials by wave or particle radiation
- G01N2223/60—Specific applications or type of materials
- G01N2223/617—Specific applications or type of materials ash in coal
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Abstract
The invention relates to a profile scanning type ash content instrument, and belongs to the technical field of coal ash content online detection. Comprises a detector, a bracket, a gamma ray follower, an explosion-proof control box and an explosion-proof box bracket. The output hole of the gamma-ray follower is in a fan shape, the detector adopts sodium iodide scintillation crystals with the size of more than 50mm, the gamma-ray follower can adapt to a steel wire belt conveyor and the design with higher required precision, has low requirement on the granularity of coal, and can detect the ash content of mixed coal on line; and the detection precision is greatly improved.
Description
Technical Field
The invention relates to a profile scanning type ash content instrument, and belongs to the technical field of coal ash content online detection.
Background
Ash is one of the important indicators of coal quality.
In some large coal production and transportation enterprises, because of the large coal transportation amount, in order to improve the strength of the coal conveying belt and increase the service life and the safety, an embedded steel wire belt is often adopted. The on-line coal ash content meter which is generally used at present is applied to a steel wire belt, the measuring result of the on-line coal ash content meter is influenced by the steel wire, a large error is generated, and the precision requirement of a site cannot be met.
The currently widely used coal ash detection technology is a dual-energy gamma-ray transmission attenuation technology, and has the defect that the ash measurement result is greatly influenced by the content change of iron elements. If the ash content meter is installed on a steel wire belt, the belt can deviate and inevitably shake in the working process, the steel wire strongly absorbs low-energy rays, the intensity attenuation of the low-energy rays is strongly changed along with the transverse movement of the belt, and the attenuation is one of main parameters of ash content calculation, so that a large error exists, and the common ash content meter cannot be normally used on the steel wire belt.
Disclosure of Invention
The invention aims to provide a profile scanning type ash content instrument, which overcomes the defects in the prior art.
The purpose of the invention is realized by the following technical scheme:
a section scanning type ash content instrument comprises a detector, a gamma ray output device, a support, an explosion-proof control box and an explosion-proof box support, and is characterized in that the support comprises a detector support, an output device support, a transverse telescopic beam, a stand column, a detector longitudinal telescopic frame, an output device longitudinal telescopic frame and a radioactive source base.
A lead shielding body is poured between the inner casing and the outer casing of the detector to shield the influence of natural rays on the detector. The effects can also be achieved by wrapping the lead blocks with one or more layers of lead sheets or laying the lead blocks with different thicknesses.
The detector adopts 50mm or more sodium iodide scintillation crystal, and the side window receives rays and is placed in the detector shell. The gamma ray output device adopts a fan-shaped output hole, the opening angle is more than 0 degree and less than or equal to 90 degrees, and the width is 0-300 mm. Because the detector adopts the sodium iodide crystal with larger size, and the gamma ray emitted by the gamma ray output device is a plane, the area of the detector for receiving the gamma ray is greatly increased.
The transverse telescopic beam component A and the upright post can change positions through sliding, and the relative height of the detector and the output device is adjusted. The detector works near the optimal working point by adjusting the relative height of the detector and the output device. The transverse telescopic beam component A is provided with a pin hole and can be fixed by bolts and the like.
The output device longitudinal expansion bracket consists of a connecting plate A and a longitudinal expansion beam, and the output device bracket consists of an output device vertical plate and a radioactive source bottom support. The connecting plate A and the vertical plate of the output device are provided with pin holes, and the height of the gamma-ray output device is adjusted by changing the positions of the pin holes. The longitudinal telescopic frame of the detector consists of a longitudinal telescopic beam of the detector and a connecting plate B. The connecting plate B and the gamma-ray detector assembly connecting plate C are both provided with notches and are fastened and connected through bolts. The detector can be horizontally displaced along the slot. The detector and the gamma-ray output device are moved back and forth left and right to enable the detector and the gamma-ray output device to be horizontally positioned on the same plane and vertically vertical.
The vertical expansion bracket of detector and horizontal flexible roof beam constitution slip formula telescopic boom, through sliding, change support width to adapt to different belt follower widths.
The top of the upright post is sealed by plastic or electrician bakelite, and the upright post is used as a sealing head cover for dust prevention and water prevention.
The explosion-proof control box is fastened on the upright post through an explosion-proof box bracket. The explosion-proof box bracket is an I-shaped bracket.
Compared with the prior art, the invention has the beneficial effects that:
the fan-shaped output hole of the gamma ray follower greatly increases the area of the detector for receiving the rays and greatly enhances the service efficiency of the detector. The steel wire belt is applied to a steel wire belt, and the influence of an embedded steel wire in the steel wire belt on low-energy rays is greatly reduced. The use precision of the equipment is improved.
The height and the width of the bracket can be adjusted, so that the profile scanning type ash content instrument can be suitable for belt conveyors with different widths and heights.
The relative position of the gamma ray output device and the detector can ensure that the detector can work in the optimal state, the counting rate of the equipment is improved, and the application precision and the service life of the equipment are correspondingly improved.
Detailed description of the preferred embodiments
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 only a part of the embodiments of the present invention, and not all of the embodiments. All other embodiments that can be derived from the embodiments of the present invention by a person of ordinary skill in the art are within the scope of the present invention.
The invention relates to a profile scanning type ash content instrument, and belongs to the technical field of coal ash content online detection. Comprises a detector, a bracket, a gamma ray follower and a host. The output hole of the gamma-ray follower is in a fan shape, the detector adopts sodium iodide scintillation crystals with the size of more than 50mm, the gamma-ray follower can adapt to a steel wire belt conveyor, the requirement on the granularity of coal is low, and the ash content of mixed coal can be detected on line; and greatly improves the detection precision
Furthermore, the opening angle range of the output device is large, and the gamma rays can irradiate the whole effective range of the crystal.
Furthermore, a detector is horizontally and vertically arranged with the belt, and the width of the coal flow detected by the detector is the length of the crystal, namely a section of the coal on the belt is detected;
furthermore, the relative heights of the output device and the detector are adjusted, so that the output signal of the detector reaches an optimal value.
The invention has the beneficial effects that: the width of the coal detected by the detector is a plane, i.e. a section, of the crystal length. The number of wires blocking low energy rays is always maintained at N and N +1 regardless of the shaking of the steel belt.
And the coal that ordinary two-photon ash content appearance detected is a point, and the steel wire belt rocks, and the steel wire figure that blocks low energy ray is 1 or 0, and detector output is unstable. Assume that the error is not
Δs=A%；
Then the error of the profile scan type ash meter is
Δ p = a%/N or Δ p = a%/(N + 1);
looking up the steel belt parameter table to know that: n is more than or equal to 10;
the profile scanning type ash analyzer can reduce the error caused by the low-energy ray blocked by the steel wire to 1/10 of a two-photon ash analyzer;
the influence of the steel wire on the attenuation of the ray is fixed, then the zero crossing point is calibrated, the influence of the steel wire is eliminated, and the online ash content instrument can be applied to a steel wire belt.
When the rubber belt is used on a common belt, the system error caused by the increase of the steel wire belt cannot be mentioned.
Furthermore, the fan-shaped output hole of the gamma-ray follower greatly increases the area of the detector for receiving rays, and greatly enhances the service efficiency of the detector. The precision can reach within 0.3% on a common belt through testing.
Comprehensively, the precision of the profile scanning type ash content instrument used on the steel wire belt can reach within 0.5%.
By means of a unique design scheme, no matter how the steel wire belt shakes, the influence of the steel wire on the ray attenuation is fixed, then the zero crossing point is calibrated, the influence of the steel wire is eliminated, and the online ash content meter can be applied to the steel wire belt.
Drawings
FIG. 1 is a schematic structural view of the present invention;
FIG. 2 is a schematic view of the gamma ray follower and detector of the present invention in connection with a support;
FIG. 3 is a schematic view of a sliding telescopic boom of the present invention
FIG. 4 is a schematic view of a detector of the present invention;
in figure 1, a detector; 2. a gamma ray follower; 3. a detector support; 4. an output device support; 5. a transverse telescopic beam; 6. a column; 7. an explosion-proof control box; 8. a longitudinal telescopic frame of the detector; 9. the output device is provided with a longitudinal telescopic frame; 10. an explosion-proof case support; 11. a radioactive source base; 12. a connecting plate B; 13. connecting plates C; 14. an output device vertical plate; 15. a connecting plate A; 16. a longitudinally extending beam; 17. a detector longitudinal telescopic beam; 18. a transverse telescopic beam assembly A; 19. a pin hole. 20. A shell jacket; 21 an outer shell and an inner sleeve.
Claims (11)
1. The utility model provides a section scanning formula ash content appearance includes detector (1), gamma ray follower (2), support, explosion-proof control box (7), explosion-proof case support (10), its characterized in that: the support comprises a detector support (3), an output device support (4), a transverse telescopic beam (5), an upright post (6), a longitudinal detector telescopic frame (8), a longitudinal output device telescopic frame (9) and a radioactive source base (11); the height of the support (3) is adjustable, the width of the support is stretchable, the support is suitable for belt conveyors of different specifications and models, the relative heights of the detector (1) and the gamma-ray output device (2) are adjustable, and the front, back, left and right positions of the detector and the gamma-ray output device are adjustable.
2. A profile scanning ash analyzer in accordance with claim 1, wherein: the length of the detector (1) adopts 50mm or more sodium iodide scintillation crystals, and a side window receives rays; the sodium iodide scintillation crystal is cylindrical, rectangular or in any other shape.
3. A profile scanning ash analyzer in accordance with claim 2, wherein: a lead shielding body is poured between a shell inner sleeve (21) and a shell outer sleeve (20) of the detector (1) and is used for shielding the influence of natural rays on the detector; the lead block can be wrapped by one or more layers of lead coatings and can be paved by lead blocks with different thicknesses to achieve the effect.
4. A profile scanning ash analyzer in accordance with claim 1, wherein: the gamma ray output device (2) adopts a fan-shaped output hole, the opening angle is more than 0 degree and less than or equal to 90 degrees, and the width is 0-300 mm.
5. A profile scanning ash analyzer in accordance with claim 1, wherein: the detector longitudinal expansion bracket (8) is composed of a detector longitudinal expansion beam (17) and a connecting plate B (12), notches are formed in the connecting plate B (12) and a gamma-ray detector assembly connecting plate C (13), and the detector (1) can be connected through bolts in a fastening mode and can be horizontally displaced along the notches.
6. A profile scanning ash analyzer in accordance with claim 1, wherein: the vertical telescopic frame (9) of the output device consists of a connecting plate A (15) and a vertical telescopic beam (16), the support (4) of the output device consists of an output device vertical plate (14) and a radioactive source bottom support (11), pin holes are formed in the connecting plate A (15) and the output device vertical plate (14), and the height of the gamma-ray output device (2) is adjusted by changing the positions of the pin holes.
7. A profile scanning ash analyzer in accordance with claims 1, 5 and 6, wherein: the detector (1) and the gamma-ray follower (2) can move back and forth, left and right on the respective mounting brackets.
8. A profile scanning ash analyzer in accordance with claim 1, wherein: the transverse telescopic beam component A (18) and the upright post (6) can change positions through sliding, the relative height of the detector (1) and the gamma-ray output device (2) is adjusted, and the transverse telescopic beam component A (18) is provided with a pin hole and can be fixed at the corresponding position.
9. A profile scanning ash analyzer in accordance with claim 1, wherein: the top of the upright post (6) is sealed by plastic or electrical bakelite and is used as a sealing head cover for dust prevention and water prevention.
10. A profile scanning ash analyzer in accordance with claim 1, wherein: the sliding telescopic arm is composed of the longitudinal telescopic frame (8) of the detector and the transverse telescopic beam (5), and the width of the bracket is changed by sliding to adapt to the width of belt output machines of different specifications and models.
11. A profile scanning ash analyzer in accordance with claim 1, wherein: the explosion-proof control box (7) is fastened on the upright post (6) through an explosion-proof box bracket (10), and the explosion-proof box bracket (10) is an I-shaped bracket or other brackets.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202011236765.7A CN112461865A (en) | 2020-11-09 | 2020-11-09 | Section scanning type ash content instrument |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202011236765.7A CN112461865A (en) | 2020-11-09 | 2020-11-09 | Section scanning type ash content instrument |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN112461865A true CN112461865A (en) | 2021-03-09 |
Family
ID=74825832
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202011236765.7A Withdrawn CN112461865A (en) | 2020-11-09 | 2020-11-09 | Section scanning type ash content instrument |
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| Country | Link |
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| CN (1) | CN112461865A (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN117783158A (en) * | 2024-02-28 | 2024-03-29 | 天津美腾科技股份有限公司 | X-ray ash content appearance with damage detects |
| CN117783158B (en) * | 2024-02-28 | 2024-05-28 | 天津美腾科技股份有限公司 | X-ray ash content appearance with damage detects |
Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| GB2054140A (en) * | 1979-06-22 | 1981-02-11 | Atomic Energy Of Australia | Improvements to X- and gamma -ray Techniques for Determination of the Ash Content of Coal |
| US4566114A (en) * | 1980-06-20 | 1986-01-21 | Australian Atomic Energy Commission | X- and γ-Ray techniques for determination of the ash content of coal |
| CN201666882U (en) * | 2009-05-27 | 2010-12-08 | 清华大学 | Coal ash content measuring device suitable for steel belts |
| CN101907582A (en) * | 2010-06-23 | 2010-12-08 | 清华大学 | Full section scanning on-line detection device |
| CN203025120U (en) * | 2013-01-05 | 2013-06-26 | 开封市测控技术有限公司 | Online ash content detecting device |
| CN106353330A (en) * | 2016-11-02 | 2017-01-25 | 苏州鼎纳自动化技术有限公司 | Laboratory test machine |
| CN210833620U (en) * | 2019-12-10 | 2020-06-23 | 力嘉(广州)包装设备有限公司 | Portal frame and detection equipment comprising same |
-
2020
- 2020-11-09 CN CN202011236765.7A patent/CN112461865A/en not_active Withdrawn
Patent Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| GB2054140A (en) * | 1979-06-22 | 1981-02-11 | Atomic Energy Of Australia | Improvements to X- and gamma -ray Techniques for Determination of the Ash Content of Coal |
| US4566114A (en) * | 1980-06-20 | 1986-01-21 | Australian Atomic Energy Commission | X- and γ-Ray techniques for determination of the ash content of coal |
| CN201666882U (en) * | 2009-05-27 | 2010-12-08 | 清华大学 | Coal ash content measuring device suitable for steel belts |
| CN101907582A (en) * | 2010-06-23 | 2010-12-08 | 清华大学 | Full section scanning on-line detection device |
| CN203025120U (en) * | 2013-01-05 | 2013-06-26 | 开封市测控技术有限公司 | Online ash content detecting device |
| CN106353330A (en) * | 2016-11-02 | 2017-01-25 | 苏州鼎纳自动化技术有限公司 | Laboratory test machine |
| CN210833620U (en) * | 2019-12-10 | 2020-06-23 | 力嘉(广州)包装设备有限公司 | Portal frame and detection equipment comprising same |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN117783158A (en) * | 2024-02-28 | 2024-03-29 | 天津美腾科技股份有限公司 | X-ray ash content appearance with damage detects |
| CN117783158B (en) * | 2024-02-28 | 2024-05-28 | 天津美腾科技股份有限公司 | X-ray ash content appearance with damage detects |
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Application publication date: 20210309 |