CN101738146B - Gunpowder ignition temperature measuring device - Google Patents
Gunpowder ignition temperature measuring device Download PDFInfo
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- CN101738146B CN101738146B CN 201010013652 CN201010013652A CN101738146B CN 101738146 B CN101738146 B CN 101738146B CN 201010013652 CN201010013652 CN 201010013652 CN 201010013652 A CN201010013652 A CN 201010013652A CN 101738146 B CN101738146 B CN 101738146B
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Abstract
The invention discloses a gunpowder ignition temperature measuring device. The device comprises a burner, an automatic temperature control heating device, a temperature measuring unit, a pressure measuring unit, a stirring device and a computer, wherein the burner consists of a burner body and a burner top cover; the burner body or the burner top cover is provided with a pressure measuring hole and the pressure measuring unit is inserted into the inside of the burner body through the pressure measuring hole; a heating medium is arranged in the automatic temperature control heating device; the burner body is immersed into the heating medium; the temperature of the heating medium is controlled by the automatic temperature control heating device; the temperature measuring unit is inserted into the heating medium in a heating bath to measure the temperature; a pressure intensity signal measured by the pressure measuring unit and a temperature signal tested by the temperature measuring unit are transmitted to the computer; and the stirring device is inserted into the heating medium. The device can safely and correctly measure a propellant ignition temperature and has a simple structure, stable and reliable performance and wide application prospect in practical application.
Description
Technical field
The present invention relates to a kind of temperature measuring apparatus, be mainly used in the mensuration of the firing temperature of propellant, fiery explosive, Loading Materials for Initiating Explosive Devices and correlated product.
Background technology
Heating rate methods such as " " ignition points that prior art adopts is the stability assay method of a kind of gunpowder, explosive, Loading Materials for Initiating Explosive Devices and nitrocotton and goods thereof, the explosion temperature measurement mechanism that the method adopts mainly is comprised of following part: heating bath 1, test tube 2, plug 3, auxiliary thermometer 4, main temperature meter 5, heater 6, heat medium 7, magnetic stirrer 8 and heater 9.When utilizing said apparatus to test, pulverize sample to the size of regulation, take by weighing quantitative sample (character per sample is 0.1g～0.3g) place in the Special test tube (heat-resistant hard glass test tube), with rubber plug cover on the test tube mouth; Test tube is put into heat medium, and heater heats to heat medium with the heating rate of regulation, adopts main temperature meter and auxiliary thermometer test heat medium temperature; When in the test tube during sample detonation, read immediately the temperature value of main temperature meter, be accurate to 0.5 ℃; Read rapidly simultaneously the temperature value of first and second auxiliary thermometer, be accurate to 1 ℃; Calculate the flashing temperature of this sample by formula.
But still there are some problems in prior art: the heat-resistant hard glass test tube is adopted in experiment because sample all belongs to priming system, the time have test tube to be exploded phenomenon.In the prior art, the criterion of getting angry is the sample detonation, and this criterion needs the experimenter to pass through to observe acquisition, and then read that a thermometer indicates temperature, but some sample is in heating process, from being fuming to a process that has of flame, cause the time of occurrence of criterion clear and definite not, introduce easily subjective error.The temperature of ignition point is generally more than 200 ℃, operator and the warm source close contact more than 200 ℃, the dangerous health that also is unfavorable for the operator.Along with the popularization and application of computer acquisition storage, prior art is also mainly by manual record, in case experimental result is had doubt, the verification of having no way of.
Summary of the invention
In order to overcome the error of gunpowder ignition point test judgement in the prior art, improve experimenter's working environment, evade the potential safety hazard that may exist in the experiment, make experimental result also have verification after experiment, the present invention adopts a kind of flashing temperature measurement mechanism to realize the safe and reliable test of gunpowder flashing temperature.
The technical solution adopted for the present invention to solve the technical problems is: comprise burner, automatic temperature control heating device, temperature measuring unit, pressure measuring unit, agitating device and computer.Burner is made of burner body 11 and burner top cover 12, and burner body 11 is the hollow thick cyclinder, lower end closed, and upper end open, opening one end and burner top cover 12 are tightly connected.Burner body and burner top cover are made by nickel-chrome alloy steel or NI-CR-MO alloys steel, and wall thickness is 2～8mm.Have pressure tap on burner body or the top cover, pressure measuring unit 14 probes into burner body inside by pressure tap, and the burner internal pressure is carried out Real-Time Monitoring.The hollow cylinder that is shaped as lower end closed, upper end open of automatic control temperature control heating device, heat medium is equipped with in inside.Burner body 11 should have 1/3～3/4 height to be immersed in the heat medium 19.The temperature of heat medium is by automatic temperature control heating device 16 controls, and the heated perimeter of automatic temperature control heating device is 50 ℃～400 ℃, and 0 ℃/min of heating rate～10 ℃/min is adjustable continuously.Temperature measuring unit 15 probes into thermometric in the heat medium 19 of heating bath; The temperature signal of the pressure signal that pressure measuring unit 14 records and temperature measuring unit 15 tests passes to computer 20.Agitating device 17 probes in the heat medium, by stirring so that heat medium 19 internal temperatures are even.
The burner top cover can be airtight, also can perforate on top cover 12, air-intaking exhaust valve 13 is installed, and can realize the burner inflation/deflation or vacuumize by air-intaking exhaust valve 13.
Pedestal for placed 10 between burner bottom and the automatic temperature control heating device, base is a hollow stent, by base burner bottom heat medium abundant and in the automatic temperature control heating device is contacted.
The outer vacuum interlayer that can be enclosed with heat insulating function of automatic temperature control heating device, heat scatters and disappears to automatic temperature control heating device is outside when reducing heating.
When the present invention works, a certain amount of sample is positioned in the body of burner, is connected with top seal.Then burner is put in the heat medium, in the heating rate of setting and temperature range, give heat medium 19 heating by automatic temperature control heating device 16, pressure in the pressure measuring unit 14 test burners, temperature measuring unit 15 probe temperatures, and pass to computer 20 and record and simultaneous display; Place the sample of burner body 11 bottoms to raise along with the rising of heat medium 19 temperature, reach sample ignition after the firing temperature, produce gas, pressure raises suddenly in the closed burner, and the temperature of the temperature curve that the corresponding temperature measuring unit 15 of pressure flex point records in the empirical curve that pressure measuring unit 14 records is the firing temperature of specimen.
The invention has the beneficial effects as follows: the present invention heats propellant by heat medium under the constant volume condition until light a fire, and experiment can isolated operation, utilizes the mensuration propellant ignition temperature of pressure measurement and thermometric synchronism detection means safety and precise; The record of whole experimental data and gather intelligent, and can reproduction; In the Preparatory work of experiment process, the specimen configuration size is not required simultaneously, the consumption of sample can be estimated according to existing powder burning gas phase growing amount data simultaneously, saved existing method to the harsh requirement of propellant sample apparent size and consumption, experimental implementation hommization.The present invention is simple in structure, and handling safety is stable and reliable for performance, has in actual applications widely prospect.
The present invention is further described below in conjunction with drawings and Examples.
Description of drawings
Fig. 1 is the propellant ignition point determination experiment device schematic diagram of prior art;
Among the figure, the 1--heating bath; The 2--test tube; The 3--plug; The 4--auxiliary thermometer; 5--main temperature meter; The 6--heater; The 7--heat medium; The 8--agitator; The 9--heater.
Fig. 2 is propellant ignition temperature point determination experiment device schematic diagram of the present invention;
Among the figure, the 10--base; The 11--burner body; 12--burner top cover; 13--air-intaking exhaust valve 13; The 14--pressure measuring unit; The 15--temperature measuring unit; The 16--automatic temperature control heating device; The 17--agitating device; The 18-collet; The 19--heat medium; The 20-computer.
Fig. 3 is the experimental data figure that embodiment 1 adopts the present invention's record; Among the figure curve 1 be in the heat medium 19 temperature over time, from 26 ℃ of basic constant heatingrates' to 230 of room temperature ℃ process; Curve 2 be in the burner 11 pressure over time, A (3551.308s on the curve 2,0.18MPa) point, B (3551.653s, 5.457MPa) point and C (3630.405s, 1.305MPa) point be respectively sample prefiring pressure, pressure and sample after lighting in burner and burn down afterwards pressure.The A point is that obvious pressure jumps to the B point, jumps at the pressure less than the 1s time, and temperature is substantially constant on the curve 1, is 210 ℃, thinks that namely this temperature is the hot spontaneous ignition temperature of sample.
Fig. 4 is the enlarged drawing at sudden change of pressure surface place among Fig. 3.
Fig. 5 is the device schematic diagram of the embodiment of the invention 2.
The specific embodiment
Embodiment 1:
As shown in Figure 2, the present invention has adopted a kind of new thermal value measurement device, comprises base 10, burner body 11, burner top cover 12, air-intaking exhaust valve 13, pressure measuring unit 14, temperature measuring unit 15, automatic temperature control heating device 16, agitating device 17, collet 18, heat medium 19 and computer 20.Burner body is that volume is 300 milliliters thick cyclinder, lower end closed, upper end open, opening one end is connected with top cover 12, the burner body upper end is tightly connected with top cover 12, burner bottom pedestal for placed 10, base 10 is the sheet metal ring of 1mm for thickness, internal diameter and the burner body matched in clearance of ring highly are 30mm, and ring is by 6 equal portions, cutting 15mm height is divided along 6 grades in the bottom, wherein 3 parts meet at right angles to the ring infolding, hold the burner that places in the ring, and base contacts with the bottom of heater by remaining 3 angles.Air-intaking exhaust valve 13 is installed on the burner top cover; Burner body 11 has 1/2 height to be immersed in the heat medium 19.Have pressure tap on the sidewall of burner body, it is inner that pressure measuring unit 14 connects burner body by pressure tap, and the burner internal pressure is carried out Real-Time Monitoring; Temperature measuring unit 15 probes into thermometric in the heat medium 19 of heating bath; The temperature signal of the pressure signal that pressure measuring unit 14 records and temperature measuring unit 15 tests passes to computer 20.Heat medium is pumping fluid, and its temperature is by automatic temperature control heating device 16 controls, 5 ℃/min of heating rate; Agitating device 17 probes in the heat medium, by stirring so that heat medium 19 internal temperatures are even; Whole heating experimental device shell is vacuum interlayer, plays heat insulating function, reduces heating bath temperature scattering and disappearing to the outside.When the present invention works, a certain amount of sample is positioned in the body of burner, is connected with top seal.Vacuumize by air-intaking exhaust valve, valve body keeps the vacuum in the burner.Then burner is put in the heat medium, in the heating rate of setting and temperature range, give heat medium 19 heating by automatic temperature control heating device 16, pressure in the pressure measuring unit 14 test burners, temperature measuring unit 15 probe temperatures pass to computer 20 by the collection of data integrated circuit board and record also simultaneous display; Place the sample of burner body 11 bottoms to raise along with the rising of heat medium 19 temperature, reach ignition after the firing temperature, produce gas, pressure raises suddenly in the closed burner, and the temperature of the temperature curve that the corresponding temperature measuring unit 15 of pressure flex point records in the empirical curve that pressure measuring unit 14 records is the firing temperature of specimen (concrete experimental procedure sees below).The flashing temperature that records under certain magnalium fuel-rich propellant vacuum is 210 ℃.
Embodiment 2:
As shown in Figure 5, the present invention has adopted a kind of new thermal value measurement device, comprises base 10, burner body 11, burner top cover 12, air-intaking exhaust valve 13, pressure measuring unit 14, temperature measuring unit 15, automatic temperature control heating device 16, agitating device 17, collet 18, heat medium 19 and computer 20.Burner body is that volume is 300 milliliters thick cyclinder, lower end closed, upper end open, opening one end is connected with top cover 12, the burner body upper end is tightly connected with top cover 12, burner bottom pedestal for placed 10, base 10 is the sheet metal ring of 1mm for thickness, internal diameter and the burner body matched in clearance of ring highly are 30mm, and ring is by 6 equal portions, cutting 15mm height is divided along 6 grades in the bottom, wherein 3 parts meet at right angles to the ring infolding, hold the burner that places in the ring, and base contacts with the bottom of heater by remaining 3 angles.Burner body 11 has 1/2 height to be immersed in the heat medium 19.Have pressure tap on the burner top cover, it is inner that pressure measuring unit 14 connects burner body by pressure tap, and the burner internal pressure is carried out Real-Time Monitoring; Temperature measuring unit 15 probes into thermometric in the heat medium 19 of heating bath; The temperature signal of the pressure signal that pressure measuring unit 14 records and temperature measuring unit 15 tests passes to computer 20.Heat medium is pumping fluid, and its temperature is by automatic temperature control heating device 16 controls, 5 ℃/min of heating rate; Agitating device 17 probes in the heat medium, by stirring so that heat medium 19 internal temperatures are even; Whole heating experimental device shell is vacuum interlayer, plays heat insulating function, reduces heating bath temperature scattering and disappearing to the outside.When the present invention works, a certain amount of sample is positioned in the body of burner, is connected with top seal.Then burner is put in the heat medium, in the heating rate of setting and temperature range, give heat medium 19 heating by automatic temperature control heating device 16, pressure in the pressure measuring unit 14 test burners, temperature measuring unit 15 probe temperatures pass to computer 20 by the collection of data integrated circuit board and record also simultaneous display; Place the sample of burner body 11 bottoms to raise along with the rising of heat medium 19 temperature, reach ignition after the firing temperature, produce gas, pressure raises suddenly in the closed burner, and the temperature of the temperature curve that the corresponding temperature measuring unit 15 of pressure flex point records in the empirical curve that pressure measuring unit 14 records is the firing temperature of specimen.The flashing temperature that records under certain magnalium fuel-rich propellant vacuum is 208 ℃
Implementation step of the present invention:
1) determining of sample quality at first is characteristic per sample, considers amount of samples from the angle of safety, and amount of samples is 3～5g under the atmospheric air usually;
2) load weighted sample is placed on burner body 11 bottoms, tightens burner top cover 12;
3) assembling pressure measuring unit 14;
4) utilize suds testing fixture air-tightness;
The burner that 5) pressure measuring unit will be installed is placed on the burner base 10;
6) automatic temperature control heating device is put into thermal insulation protection cover 18;
7) at automatic temp controller 16 interior installation agitating devices 17, put into temperature measuring unit 15, will be equipped with pressure measuring unit 14 burners and put into automatic temp controller 16, add heat medium 10 until the submerged burner top cover, open automatic temperature control heating device 16, design temperature scope and heating rate;
8) computer recording monitoring combustion chamber pressure and heating bath temperature curve over time;
9) observe the computer recording pressure curve, when flex point appearred in the pressure curve sudden change, the temperature of the corresponding heating bath of this pressure flex point was the firing temperature of propellant, save data subsequent treatment.
Claims (8)
1. gunpowder ignition temperature measuring device comprises burner, automatic temperature control heating device, temperature measuring unit, pressure measuring unit, agitating device and computer, it is characterized in that: burner is made of burner body and burner top cover; Burner body is the hollow thick cyclinder, lower end closed, and upper end open, the upper end is connected with the burner top seal; Burner body and burner top cover are made by nickel-chrome alloy steel or NI-CR-MO alloys steel, and wall thickness is 2～8mm; Have pressure tap on burner body or the burner top cover, pressure measuring unit probes into burner body inside by pressure tap; The hollow cylinder that is shaped as lower end closed, upper end open of automatic temperature control heating device, heat medium is equipped with in inside; Burner body has 1/3～3/4 height to be immersed in the heat medium; The temperature of heat medium is controlled by automatic temperature control heating device, and the heated perimeter of automatic temperature control heating device is 50 ℃～400 ℃, and 0 ℃/min of heating rate～10 ℃/min is adjustable continuously; Temperature measuring unit probes into thermometric in the heat medium; The temperature signal of the pressure signal that pressure measuring unit records and temperature measuring unit test passes to computer; Agitating device probes in the heat medium.
2. gunpowder ignition temperature measuring device according to claim 1 is characterized in that: if the firing temperature of gunpowder to be measured below 300 ℃, described heat medium is chosen high boiling oil, the boiling point of higher boiling oil is 300～400 ℃; If the firing temperature of gunpowder to be measured is more than 300 ℃, described heat medium is chosen low-melting alloy, and the fusing point of low-melting alloy is 50～80 ℃, and boiling point is about 1000 ℃.
3. gunpowder ignition temperature measuring device according to claim 2 is characterized in that: described higher boiling oil is pumping fluid, silicone oil or machine oil.
4. gunpowder ignition temperature measuring device according to claim 2, it is characterized in that: described low-melting alloy is Wood's metal.
5. gunpowder ignition temperature measuring device according to claim 1, it is characterized in that: described burner body volume is 250～350ml, can be by the test of 30MPa water pressure resistance.
6. gunpowder ignition temperature measuring device according to claim 1 is characterized in that: perforate on the described burner top cover, installation air-intaking exhaust valve.
7. gunpowder ignition temperature measuring device according to claim 1 is characterized in that: pedestal for placed between described burner bottom and the automatic temperature control heating device, base is a hollow stent.
8. gunpowder ignition temperature measuring device according to claim 1, it is characterized in that: described automatic temperature control heating device is wrapped with vacuum interlayer.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201010013652 CN101738146B (en) | 2010-01-21 | 2010-01-21 | Gunpowder ignition temperature measuring device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201010013652 CN101738146B (en) | 2010-01-21 | 2010-01-21 | Gunpowder ignition temperature measuring device |
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| Publication Number | Publication Date |
|---|---|
| CN101738146A CN101738146A (en) | 2010-06-16 |
| CN101738146B true CN101738146B (en) | 2013-04-17 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 201010013652 Expired - Fee Related CN101738146B (en) | 2010-01-21 | 2010-01-21 | Gunpowder ignition temperature measuring device |
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Families Citing this family (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102042994A (en) * | 2010-10-28 | 2011-05-04 | 西安近代化学研究所 | Temperature test device for ignition point of explosive |
Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| GB1295050A (en) * | 1969-01-07 | 1972-11-01 | ||
| US5182940A (en) * | 1991-10-17 | 1993-02-02 | Automated Pipeline Instruments Incorporated | Flash point testing apparatus and method |
| CN1221786C (en) * | 2002-12-03 | 2005-10-05 | 中国科学院力学研究所 | Method for testing temperature of explosive ignition point |
| CN201607417U (en) * | 2010-01-21 | 2010-10-13 | 西北工业大学 | Unit for measuring ignition temperature of gunpowder |
-
2010
- 2010-01-21 CN CN 201010013652 patent/CN101738146B/en not_active Expired - Fee Related
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| GB1295050A (en) * | 1969-01-07 | 1972-11-01 | ||
| US5182940A (en) * | 1991-10-17 | 1993-02-02 | Automated Pipeline Instruments Incorporated | Flash point testing apparatus and method |
| CN1221786C (en) * | 2002-12-03 | 2005-10-05 | 中国科学院力学研究所 | Method for testing temperature of explosive ignition point |
| CN201607417U (en) * | 2010-01-21 | 2010-10-13 | 西北工业大学 | Unit for measuring ignition temperature of gunpowder |
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| CN101738146A (en) | 2010-06-16 |
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Inventor after: Wang Yinghong Inventor after: Zhang Xiaohong Inventor after: Zhao Hongli Inventor after: Sun Zhihua Inventor after: Bao Futing Inventor after: Chen Chao Inventor after: Sun Mei Inventor after: Wang Hong Inventor before: Wang Yinghong Inventor before: Zhang Xiaohong Inventor before: Zhao Hongli Inventor before: Sun Zhihua Inventor before: Bao Futing Inventor before: Chen Chao Inventor before: Sun Mei Inventor before: Wang Hong |
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Granted publication date: 20130417 Termination date: 20150121 |
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