CN111579525B - Device for automatically detecting water content of powdery energetic material - Google Patents

Device for automatically detecting water content of powdery energetic material Download PDF

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Publication number
CN111579525B
CN111579525B CN202010411413.4A CN202010411413A CN111579525B CN 111579525 B CN111579525 B CN 111579525B CN 202010411413 A CN202010411413 A CN 202010411413A CN 111579525 B CN111579525 B CN 111579525B
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sampling
control system
automatic control
detection
signal
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CN111579525A (en
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郝尧刚
程诩菲
李志华
陈明磊
高登学
陈全文
闫波
张波
杨琰鹏
王娜
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GANSU YINGUANG CHEMICAL INDUSTRY GROUP CO LTD
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    • GPHYSICS
    • G01MEASURING; TESTING
    • G01NINVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
    • G01N21/00Investigating or analysing materials by the use of optical means, i.e. using sub-millimetre waves, infrared, visible or ultraviolet light
    • G01N21/17Systems in which incident light is modified in accordance with the properties of the material investigated
    • G01N21/25Colour; Spectral properties, i.e. comparison of effect of material on the light at two or more different wavelengths or wavelength bands
    • G01N21/31Investigating relative effect of material at wavelengths characteristic of specific elements or molecules, e.g. atomic absorption spectrometry
    • G01N21/35Investigating relative effect of material at wavelengths characteristic of specific elements or molecules, e.g. atomic absorption spectrometry using infrared light
    • G01N21/359Investigating relative effect of material at wavelengths characteristic of specific elements or molecules, e.g. atomic absorption spectrometry using infrared light using near infrared light
    • GPHYSICS
    • G01MEASURING; TESTING
    • G01NINVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
    • G01N21/00Investigating or analysing materials by the use of optical means, i.e. using sub-millimetre waves, infrared, visible or ultraviolet light
    • G01N21/01Arrangements or apparatus for facilitating the optical investigation

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  • Spectroscopy & Molecular Physics (AREA)
  • Health & Medical Sciences (AREA)
  • Life Sciences & Earth Sciences (AREA)
  • Chemical & Material Sciences (AREA)
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  • General Health & Medical Sciences (AREA)
  • General Physics & Mathematics (AREA)
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Abstract

An automatic device for detecting the moisture of a powdery energetic material comprises a sampling device, a detection device, a blowing device and an automatic control system. The automatic control system is respectively connected with the sampling device, the detection device and the air blowing device through the control loop, and the operations of on-line sampling, moisture detection and sample return are realized through a preset program. By arranging the blowing device, the dust prevention box where the transmission part and the detection device are positioned in the sampling process is always in a positive pressure state, dust is isolated, and the extremely high-level explosion prevention requirement in the energy-containing material moisture detection process is met; and the blowing device blows the detection probe and the sampling spoon, so that the influence on measurement accuracy in a humid environment is eliminated. Successfully solves the problems of using and popularizing the near infrared online moisture analysis method in the online detection of the moisture of the powdery energetic material.

Description

Device for automatically detecting water content of powdery energetic material
Technical Field
The invention belongs to the field of energy-containing material moisture detection equipment, and particularly relates to a device for automatically detecting powdery energy-containing material moisture.
Background
In the existing production process of the powdery energetic material, the moisture is usually measured by adopting an oven method and a Karl Fischer electric quantity method, wherein the oven method adopts a drying and weighing mode, and the measuring period is longer; the karl fischer electric method needs to dissolve the energetic material sample to be measured in the electrolyte in advance, but the conventional energetic materials such as RDX, HMX and the like cannot meet the measurement requirement due to poor solubility. In addition, the two analysis methods need a series of operations such as sampling, inspection, analysis and the like, and the measurement is long in time consumption, so that the defects of measurement results are delayed, and the conventional energy-containing material moisture detection method cannot meet the requirements of rapid and accurate detection of moisture content in the process and working procedures in production.
Research and development personnel have been reported to try to detect the moisture of the energetic material on line by using the near infrared principle, but the research and development personnel still cannot well eliminate the influence of the external more humid environment on the measurement precision, and the extremely high-grade explosion-proof requirement which is required to be achieved by the on-line moisture detection of the powdery energetic material. By combining the special properties of the energetic materials and the specific functions of the near-infrared online moisture analysis instrument, the device for automatically and online detecting the moisture of the powdery energetic materials is researched, the device is rapid and accurate in analysis, the requirements of explosion prevention and man-machine isolation can be met, and the problems of using and popularizing the near-infrared online moisture analysis method in the online detection of the moisture of the powdery energetic materials are successfully solved.
Disclosure of Invention
The invention aims to overcome the defects that the conventional method for detecting the moisture of the energetic material in the prior art has long detection period and lag measurement result, and is not suitable for moisture measurement by the conventional detection method due to the special physicochemical characteristics of the detected sample. And the near infrared detection method is used for solving the problems that the external moist environment has influence on measurement precision and cannot meet the high-grade explosion-proof requirement when the powdery energetic material is subjected to online moisture detection, and the like, and the device for automatically detecting the moisture of the powdery energetic material is provided.
In order to solve the technical problems, the invention provides a device for automatically detecting the moisture of a powdery energetic material, which comprises a sampling device, a detection device, an air blowing device and an automatic control system;
the sampling device comprises a transmission part, a sampling spoon and a medicine scraping plate; the transmission part comprises a sampling cylinder, a rotary cylinder and a coupler; the sampling cylinder is connected with the rotary cylinder through a coupler; the front end of the rotary cylinder is connected with a sampling spoon, and a medicine scraping plate is arranged above the sampling spoon and used for scraping a sample to be detected in the sampling spoon so as to prevent the accuracy of a detection result from being influenced when the surface of the sample to be detected in the sampling spoon is uneven;
the detection device comprises a detection probe; the detection probe is a near infrared moisture detection probe with specific wavelength; the detection probe is selected according to specific functional groups contained in the powdery energetic material to be detected and the strong absorption region of water in near infrared light; the strong absorption region of water is at the near infrared wavelengths 1430nm and 1940nm, and the specific functional group contained in the powdery energetic material to be detected is-NH 2 when-NH 2 The specific absorption wavelength of (1) is 1600nm and 3400nm, and in order to avoid superposition and interference of absorption peaks, a probe with 1940nm as a specific detection wave band is selected; when the specific functional group contained in the powdery energetic material to be detected is-OH, the specific absorption wave band of-OH is 3200 nm-3700 nm, and 1430nm or 1940nm can be selected as a probe with a specific detection wave band at will; the detection probe is arranged in the explosion-proof shell;
the sampling device transmission part and the detection device are arranged in the dust-proof box;
the air blowing device comprises an air blowing device I, an air blowing device II and an air blowing device III; the blowing device is realized by the common means in the prior art and generally comprises an air source, an air pipe and an electromagnetic valve; in the operation process of the device for automatically detecting the moisture of the powdery energetic material, the blowing device continuously blows air to the transmission part and the dust box where the detection device is positioned, so that the inside of the dust box is kept in a positive pressure state, dust is isolated from entering, and an extremely high explosion-proof state is achieved; the blowing device II blows air to the near infrared moisture detection probe to ensure that the residue of the powdery energetic material on the probe lens is blown off after the moisture detection of the sample is completed, and meanwhile, the temperature of the probe can be reduced; the blowing device III is used for blowing the sample spoon, after the sample detection is completed in a humid environment, the sample spoon can be adhered with partial medicines and can influence the detection of the next sample moisture, and the blowing device III is used for blowing off the residue of the powdery energetic material on the sample spoon, so that the influence of the powdery energetic material adhered to the sample spoon on the next sample moisture detection is eliminated;
the automatic control system is respectively connected with the sampling device, the detection device and the air blowing device through the control loop, and the operations of on-line sampling, moisture detection and sample return are realized through a preset program.
The automatic control system controls the sampling device, the detection device and the blowing device in the following mode:
when the automatic control system works, the automatic control system sends a signal to the air blowing device, the air blowing device starts to work and blows air to the dust box, and when the dust box is filled with air, the automatic control system sends a signal;
the automatic control system receives a feedback signal of the dust box and then sends a signal to the sampling device, the telescopic rod of the sampling cylinder stretches out to drive the sampling spoon to stretch out, and when the telescopic rod of the sampling cylinder stretches out to a final position, the sampling spoon stops sampling at a sampling position; after the sampling is finished, the sampling device sends a feedback signal to the automatic control system, the automatic control system sends a signal to the sampling device after receiving the feedback signal, the telescopic rod of the sampling air cylinder retracts, the medicine scraping plate scrapes the sample to be measured in the sampling spoon, when the telescopic rod of the sampling air cylinder retracts to the initial position, the sampling spoon stops below the detection probe, and the sampling device sends a signal to the automatic control system;
the automatic control system receives the feedback signal of the sampling device and then sends a signal to the detection device for moisture detection, the detection device sends a feedback signal to the automatic control system after detection is completed, the automatic control system sends a signal to the air blowing device after receiving the feedback signal, the air blowing device works at the second beginning to sweep the surface of the detection probe, and the air blowing device sends a signal to the automatic control system after sweeping is completed;
after receiving the feedback signal of the blowing device, the automatic control system sends a signal to the sampling device, the telescopic rod of the sampling cylinder stretches out to drive the sampling spoon to stretch out, and when the telescopic rod of the sampling cylinder stretches out to a final position, the sampling spoon stops to a sampling position, and the sampling device sends a feedback signal to the automatic control system; the automatic control system sends a signal to the sampling device, the rotary cylinder rotates clockwise to drive the sampling spoon to turn over, the sampling spoon turns over 180 degrees when the rotary cylinder stops, the sample is sent back to the sampling position, and the sampling device sends a signal to the automatic control system;
the automatic control system sends a signal to the air blowing device after receiving the feedback signal of the sampling device, the air blowing device works, the surface of the sampling ladle is purged, and after purging is completed, the automatic control system sends a signal;
after receiving the feedback signal of the blowing device, the automatic control system sends a signal to the sampling device, the rotary cylinder rotates anticlockwise to drive the sampling spoon to reversely overturn, and the sampling spoon reversely overturns 180 degrees when the rotary cylinder stops, so as to send a signal to the automatic control system;
the automatic control system receives a feedback signal of the rotary cylinder and then sends a signal to the sampling device, the telescopic rod of the sampling cylinder is retracted to drive the sampling spoon to retract, and when the telescopic rod of the sampling cylinder is retracted to an initial position, the sampling spoon is stopped at the initial position, so that primary moisture detection is completed;
and repeating the cyclic processes of medicine taking, detection and sample returning when moisture detection is performed again.
The device for automatically detecting the water content of the powdery energetic material has the following beneficial effects:
according to the invention, by arranging the air blowing device, dust is isolated under the condition that the transmission part and the dust box where the detection device is positioned are always in a positive pressure state in the sampling process, and the requirement of extremely high-level explosion prevention in the process of detecting the moisture of the energetic material is met; and the blowing device blows the detection probe and the sampling spoon, so that the defect of influence on measurement accuracy in a humid environment is eliminated. The invention combines the special property of the energetic material and the specific function of the near-infrared online moisture analysis instrument, successfully researches a device for automatically detecting the moisture of the powdery energetic material online, realizes the requirements of explosion prevention and man-machine isolation, and successfully solves the problems of using and popularizing the near-infrared online moisture analysis method in the online detection of the moisture of the powdery energetic material.
Drawings
FIG. 1 is a schematic control diagram of an automatic control system of a device for automatically detecting the moisture of a powdery energetic material according to the present invention.
Detailed Description
The invention will be further described with reference to the drawings and specific examples.
Example 1: the invention provides a device for automatically detecting the moisture of a powdery energetic material, which comprises a sampling device, a detection device, an air blowing device and an automatic control system, wherein the sampling device is connected with the detection device;
the sampling device comprises a transmission part, a sampling spoon and a medicine scraping plate; the transmission part comprises a sampling cylinder, a rotary cylinder and a coupler; the sampling cylinder is connected with the rotary cylinder through a coupler; the front end of the rotary cylinder is connected with a sampling spoon, and a medicine scraping plate is arranged above the sampling spoon and used for scraping a sample to be detected in the sampling spoon so as to prevent the accuracy of a detection result from being influenced when the surface of the sample to be detected in the sampling spoon is uneven;
the detection device comprises a detection probe; the detection probe is a near infrared moisture detection probe with specific wavelength; the detection probe is selected according to specific functional groups contained in the powdery energetic material to be detected and the strong absorption region of water in near infrared light; the strong absorption region of water is at the near infrared wavelengths 1430nm and 1940nm, and the specific functional group contained in the powdery energetic material to be detected is-NH 2 when-NH 2 The specific absorption wavelength of (1) is 1600nm and 3400nm, and in order to avoid superposition and interference of absorption peaks, a probe with 1940nm as a specific detection wave band is selected; when the specific functional group contained in the powdery energetic material to be detected is-OH, the specific absorption wave band of-OH is 3200 nm-3700 nm, and 1430nm or 1940nm can be selected as a probe with a specific detection wave band at will; the detection probe is arranged in the explosion-proof shell; the detection probe selected in the embodiment is a MOSITECK near-infrared moisture detection probe in America, and the specific measurement wave band is 1940nm.
The sampling device transmission part and the detection device are arranged in the dust-proof box;
the air blowing device comprises an air blowing device I, an air blowing device II and an air blowing device III; the blowing device is realized by the common means in the prior art and generally comprises an air source, an air pipe and an electromagnetic valve; in the operation process of the device for automatically detecting the moisture of the powdery energetic material, the blowing device continuously blows air to the transmission part and the dust box where the detection device is positioned, so that the inside of the dust box is kept in a positive pressure state, dust is isolated from entering, and an extremely high explosion-proof state is achieved; the blowing device II blows air to the near infrared moisture detection probe to ensure that the residue of the powdery energetic material on the probe lens is blown off after the moisture detection of the sample is completed, and meanwhile, the temperature of the probe can be reduced; the blowing device III is used for blowing the sample spoon, after the sample detection is completed in a humid environment, the sample spoon can be adhered with partial medicines and can influence the detection of the next sample moisture, and the blowing device III is used for blowing off the residue of the powdery energetic material on the sample spoon, so that the influence of the powdery energetic material adhered to the sample spoon on the next sample moisture detection is eliminated;
the automatic control system is respectively connected with the sampling device, the detection device and the air blowing device through the control loop, and the operations of on-line sampling, moisture detection and sample return are realized through a preset program.
The automatic control system controls the sampling device, the detection device and the blowing device in the following mode:
when the automatic control system works, the automatic control system sends a signal to the air blowing device, the air blowing device starts to work and blows air to the dust box, and when the dust box is filled with air, the automatic control system sends a signal;
the automatic control system receives a feedback signal of the dust box and then sends a signal to the sampling device, the telescopic rod of the sampling cylinder stretches out to drive the sampling spoon to stretch out, and when the telescopic rod of the sampling cylinder stretches out to a final position, the sampling spoon stops sampling at a sampling position; after the sampling is finished, the sampling device sends a feedback signal to the automatic control system, the automatic control system sends a signal to the sampling device after receiving the feedback signal, the telescopic rod of the sampling air cylinder retracts, the medicine scraping plate scrapes the sample to be measured in the sampling spoon, when the telescopic rod of the sampling air cylinder retracts to the initial position, the sampling spoon stops below the detection probe, and the sampling device sends a signal to the automatic control system;
the automatic control system receives the feedback signal of the sampling device and then sends a signal to the detection device for moisture detection, the detection device sends a feedback signal to the automatic control system after detection is completed, the automatic control system sends a signal to the air blowing device after receiving the feedback signal, the air blowing device works at the second beginning to sweep the surface of the detection probe, and the air blowing device sends a signal to the automatic control system after sweeping is completed;
after receiving the feedback signal of the blowing device, the automatic control system sends a signal to the sampling device, the telescopic rod of the sampling cylinder stretches out to drive the sampling spoon to stretch out, and when the telescopic rod of the sampling cylinder stretches out to a final position, the sampling spoon stops to a sampling position, and the sampling device sends a feedback signal to the automatic control system; the automatic control system sends a signal to the sampling device, the rotary cylinder rotates clockwise to drive the sampling spoon to turn over, the sampling spoon turns over 180 degrees when the rotary cylinder stops, the sample is sent back to the sampling position, and the sampling device sends a signal to the automatic control system;
the automatic control system sends a signal to the air blowing device after receiving the feedback signal of the sampling device, the air blowing device works, the surface of the sampling ladle is purged, and after purging is completed, the automatic control system sends a signal;
after receiving the feedback signal of the blowing device, the automatic control system sends a signal to the sampling device, the rotary cylinder rotates anticlockwise to drive the sampling spoon to reversely overturn, and the sampling spoon reversely overturns 180 degrees when the rotary cylinder stops, so as to send a signal to the automatic control system;
the automatic control system receives a feedback signal of the rotary cylinder and then sends a signal to the sampling device, the telescopic rod of the sampling cylinder is retracted to drive the sampling spoon to retract, and when the telescopic rod of the sampling cylinder is retracted to an initial position, the sampling spoon is stopped at the initial position, so that primary moisture detection is completed;
and repeating the cyclic processes of medicine taking, detection and sample returning when moisture detection is performed again.

Claims (5)

1. The device for automatically detecting the moisture of the powdery energetic material is characterized by comprising a sampling device, a detection device, a blowing device and an automatic control system;
the sampling device comprises a transmission part, a sampling spoon and a medicine scraping plate;
the transmission part comprises a sampling cylinder and a rotary cylinder; the sampling cylinder is connected with the rotary cylinder; the front end of the rotary cylinder is connected with a sampling spoon; a medicine scraping plate is arranged above the sampling spoon;
the detection device comprises a detection probe; the detection probe is a near infrared moisture detection probe with specific wavelength, and is selected according to specific functional groups contained in the powdery energetic material to be detected and a strong absorption region of water in near infrared light; the detection probe is arranged in the explosion-proof shell;
the transmission part and the detection device are arranged in the dust box;
the air blowing device comprises an air blowing device I, an air blowing device II and an air blowing device III;
the blowing device is used for continuously blowing air to the transmission part and the dust box where the detection device is positioned in the running process of the device for automatically detecting the moisture of the powdery energetic material; the second blowing device blows air to the detection probe; the third air blowing device blows air to the sampling spoon;
the air blowing device comprises an air source, an air pipe and an electromagnetic valve;
the automatic control system is respectively connected with the sampling device, the detection device and the air blowing device through the control loop, and the operations of on-line sampling, moisture detection and sample return are realized through a preset program.
2. The apparatus for automatically detecting moisture in a powdered energetic material according to claim 1, wherein the automatic control system controls the sampling means, the detecting means, the blowing means by:
when the automatic control system works, the automatic control system sends a signal to the air blowing device, the air blowing device starts to work and blows air to the dust box, and when the dust box is filled with air, the automatic control system sends a signal;
the automatic control system receives a feedback signal of the dust box and then sends a signal to the sampling device, the telescopic rod of the sampling cylinder stretches out to drive the sampling spoon to stretch out, and when the telescopic rod of the sampling cylinder stretches out to a final position, the sampling spoon stops sampling at a sampling position;
after the sampling is finished, the sampling device sends a feedback signal to the automatic control system, the automatic control system sends a signal to the sampling device after receiving the feedback signal, the telescopic rod of the sampling air cylinder retracts, the medicine scraping plate scrapes the sample to be measured in the sampling spoon, when the telescopic rod of the sampling air cylinder retracts to the initial position, the sampling spoon stops below the detection probe, and the sampling device sends a signal to the automatic control system;
the automatic control system receives the feedback signal of the sampling device and then sends a signal to the detection device for moisture detection, the detection device sends a feedback signal to the automatic control system after detection is completed, the automatic control system sends a signal to the air blowing device after receiving the feedback signal, the air blowing device works at the second beginning to sweep the surface of the detection probe, and the air blowing device sends a signal to the automatic control system after sweeping is completed;
after receiving the feedback signal of the blowing device, the automatic control system sends a signal to the sampling device, the telescopic rod of the sampling cylinder stretches out to drive the sampling spoon to stretch out, when the telescopic rod of the sampling cylinder stretches out to a final position, the sampling spoon stops to a sampling position,
the sampling device sends a feedback signal to the automatic control system; the automatic control system sends a signal to the sampling device, the rotary cylinder rotates clockwise to drive the sampling spoon to turn over, the sampling spoon turns over 180 degrees when the rotary cylinder stops, the sample is sent back to the sampling position, and the sampling device sends a signal to the automatic control system;
the automatic control system sends a signal to the air blowing device after receiving the feedback signal of the sampling device, the air blowing device works, the surface of the sampling ladle is purged, and after purging is completed, the automatic control system sends a signal;
after receiving the feedback signal of the blowing device, the automatic control system sends a signal to the sampling device, the rotary cylinder rotates anticlockwise to drive the sampling spoon to reversely overturn, and the sampling spoon reversely overturns 180 degrees when the rotary cylinder stops, so as to send a signal to the automatic control system;
the automatic control system receives a feedback signal of the rotary cylinder and then sends a signal to the sampling device, the telescopic rod of the sampling cylinder is retracted to drive the sampling spoon to retract, and when the telescopic rod of the sampling cylinder is retracted to an initial position, the sampling spoon is stopped at the initial position, so that primary moisture detection is completed;
when moisture detection is performed again, the cycle of sampling, detection and sample return is repeated.
3. An apparatus for automatically detecting moisture in a powdered energetic material as claimed in claim 1 or 2, wherein the specific functional group contained in the powdered energetic material to be detected is-NH 2 Selecting 1940nm as a probe of a specific detection wave band; when the specific functional group contained in the powdery energetic material to be detected is-OH, 1430nm or 1940nm is selected as a probe of a specific detection wave band.
4. An apparatus for automatically detecting moisture in a powdered energetic material according to claim 1 or 2, wherein said transmission means further comprises a coupling, said sampling cylinder and said rotary cylinder being connected by a coupling.
5. A device for automatically detecting the moisture of a powdered energetic material according to claim 3, wherein said transmission member further comprises a coupling, said sampling cylinder and said rotary cylinder being connected by the coupling.
CN202010411413.4A 2020-05-15 2020-05-15 Device for automatically detecting water content of powdery energetic material Active CN111579525B (en)

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