CN105277670A - Gunpowder specific volume measuring instrument - Google Patents
Gunpowder specific volume measuring instrument Download PDFInfo
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- CN105277670A CN105277670A CN201510661404.XA CN201510661404A CN105277670A CN 105277670 A CN105277670 A CN 105277670A CN 201510661404 A CN201510661404 A CN 201510661404A CN 105277670 A CN105277670 A CN 105277670A
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- gas tank
- gunpowder
- specific volume
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Abstract
The invention discloses a gunpowder specific volume measuring instrument in order to solve the problems that corrosion leakage easily happens and test object kinds are less in the prior art. The gunpowder specific volume measuring instrument is composed of an oxygen bomb, a vacuum pump, a gas tank, a temperature sensor, a pressure sensor and a data collector. The oxygen bomb is a container for gunpowder combustion, the vacuum pump is used to vacuumize the oxygen bomb and the apparatus, the gas tank is used to store gunpowder combustion gas, the pressure sensor is used to measure the combustion gas pressure, the temperature sensor is used to measure the combustion gas temperature, and the data collector is used to acquire data, process data and output a measure result. The designed gas tank selects an anticorrosion material for processing, can be rapidly dismounted, installed and cleaned, and solves the corrosion leakage problem of the gunpowder specific volume measuring instrument. The gas tank volume can be changed by replacing a gas tank body with different length, and thus the system volume of the gunpowder specific volume measuring instrument is changed, and the problem that the gunpowder specific volume measuring instrument is less in test object kind is solved.
Description
Technical field
The invention belongs to explosive wastewater technical field, relate generally to a kind of gunpowder specific volume measuring instrument.
Background technology
Gunpowder specific volume is one of important parameter weighing gunpowder acting capacity of water.Gunpowder specific volume is measured with specific volume measuring instrument usually, this measuring technique has become one of the important experimental technique of propellant powder, propellant, priming system homenergic performance characterization at home and abroad, irreplaceable effect is played in propellant powder and the research of propellant basic property, providing a large amount of basic data reliably to gun inner trajectory, powder charge design and the design of propellant motor charge, is also one of important indicator being permitted multi-type Weapon System fundamental research and examination.
Scientific research institutions of China, propellant powder factory and each services, the specific volume measuring instrument operated has following two shortcomings: one is that the specific volume measuring instrument generally used at present all can leak gas because of the corrosion of gas tank after long-term use.These gas tanks are divided into solder design formula and screw assembly type, solder design formula mainly refers to the rectangular parallelepiped gas tank that employing sheet steel is welded into or adopts weldless steel tube to add circular steel plate the right cylinder gas tank be welded into, and this gas tank easily leaks gas because of the corrosion at solder design place.The rubber ring of screw assembly type mainly on multiple screw in compression end cap is with the right cylinder gas tank of sealing, this gas tank does not have weld seam so corrosion resistance is better, but this gas tank two end caps need at least five long bolts and ten nuts to compress seal with elastometic washer, install, dismantle and clean all pretty troublesome, the too tight or too loose gas tank that all can cause of single nut leaks gas.These two kinds of gas tanks all can cause system volume to change because of the corrosive attack of the oxides of nitrogen in combustion gas, inorganic salts and moisture content long term accumulation, and then affect the precision of specific volume test, and they all fundamentally do not solve the corrosion air-leakage problem of gas tank.
Two is that system volume is immutable causes testable gunpowder kind less.The accuracy of specific volume test result depends primarily on the measuring accuracy of pressure transducer and temperature sensor.The measuring accuracy of sensor and range are contradiction, and the linearity difference of sensor when narrow pressure limit build-in test is less, and transducer range is narrower, measuring accuracy is higher, the linearity difference of sensor when wide pressure limit build-in test is comparatively large, and transducer range is wider, and measuring accuracy is lower.The Pressure Sensor Precision that the test of gunpowder specific volume uses is higher; so its range is just narrow; when test dose is few, system volume is corresponding little; test dose system volume of many times is corresponding wants large; such gaseous-pressure fluctuates all the time in a less scope; could while guarantee measuring accuracy, protection pressure transducer does not damage because of outrange test, and specific volume test result also can be more accurate.There are strict requirements to the specific volume test dose of Loading Materials for Initiating Explosive Devices, propellant, propellant powder for national military standard, arbitrarily can not add and subtract dose.Mostly Loading Materials for Initiating Explosive Devices is initiating explosive, the shock wave that COMBUSTION TO DETONATION TRANSITION produces can produce strong percussive action to oxygen bomb, easily damages oxygen bomb, therefore when dose is too large, the gunpowder specific volume measuring instrument test dose of test Loading Materials for Initiating Explosive Devices is generally 1g ~ 2g, and system volume is generally 1L ~ 2L.Propellant is many containing metal powder, and the too large ablation to oxygen bomb of dose is very serious, so the gunpowder specific volume measuring instrument test dose of test propellant is generally 3g ~ 4g, system volume is generally 2L ~ 3L.The gunpowder specific volume measuring instrument test dose of testing and launching medicine is generally 5g ~ 6g, and system volume is generally 3L ~ 4L.Because can not change the system volume of specific volume measuring instrument fast, the tested object of gunpowder specific volume measuring instrument is less.Above three kinds of gunpowder specific volume measuring instrument test pressure fluctuation ranges are-1Bar ~ 1Bar (pressure transducer range-1Bar ~ 4Bar), and the gunpowder kind that every platform gunpowder specific volume measuring instrument can be tested is all very limited.
Summary of the invention
Technical matters to be solved by this invention is, develops a kind of gunpowder specific volume measuring instrument, solves prior art corrosion air-leakage, the immutable problem of volume.
In order to solve the problems of the technologies described above, the present invention designs a kind of easy accessibility, without the need to by other instruments, the corrosion-resistant gas tank getting final product attaching/detaching or fit sealing with hand, regularly or as required can clean gas tank at any time and prevent corrosion and ponding; Adopt the blind nut of corrosion resistant chromium Ni-Mo alloy steel materials processing gas tank, end cap, gas tank body and ferrule fitting, adopt the sealing of annular rubber circle; Design processing four internal-and external diameters are identical with two ends thread size, but the gas tank body that length is different, the gas tank body of four length can exchange, can mate with end cap and jam nut, only need change the gas tank body of corresponding length, the volume of gas tank can be changed fast, and then change the system volume of specific volume measuring instrument; For ease of one hand install, dismounting and fastening, simultaneously in order to ensure that pressure transducer, temperature sensor and ferrule fitting can be installed on the end cap of gas tank, and be connected with gas tank body interior, the inside diameter ranges of design gas tank body is 55mm ~ 65mm, external diametrical extent is 65mm ~ 75mm, external diameter 10mm larger than internal diameter, wall thickness is 5mm, in order to realize the utilization to waste and old oxygen bomb accessory (blind nut, inner washer and outer washer), the gas tank body internal diameter of the present invention's design, external diameter, two ends external thread are identical with the structure of oxygen bomb body; The gas tank body volume difference 1L of adjacent two length, the volume of four gas tank bodies is respectively: 1L, 2L, 3L, 4L, and the length l of gas tank body can by formula l=V/ π d
2calculate, V is the volume of gas tank body, and r is the internal diameter of gas tank body; Use the gas tank body of 1L or 2L volume during test initiating explosive, use the gas tank body of 2L or 3L volume during test propellant, during testing and launching medicine, use the gas tank body of 3L or 4L volume.
Gunpowder specific volume measuring instrument provided by the invention, is made up of oxygen bomb, vacuum pump, gas tank, pressure transducer, temperature sensor and data acquisition unit; Described oxygen bomb is the container of powder burning, vacuum pump is used for vacuumizing oxygen bomb and device, and gas tank is for storing powder gas, and pressure transducer is for testing gaseous-pressure, temperature sensor is for testing fuel gas temperature, and data acquisition unit is used for image data, processes data and output test result; The oxygen bomb vacuum pump evacuation of gunpowder will be housed, after igniting, oxygen bomb is immersed in the water and cools, with vacuum pump to other partial vacuum of the device except oxygen bomb, connect oxygen bomb on proving installation, the numerical value of the pressure transducer of gas tank one end and the temperature sensor of the other end is arranged on data acquisition unit collection, the gunpowder specific volume testing software that data acquisition unit is installed calculates gunpowder bulking value according to reader, and gunpowder specific volume measuring instrument of the present invention can test the bulking value comprising initiating explosive, propellant powder and propellant.
Described gas tank is symmetrical, and centre is gas tank body, and two ends are respectively blind nut, end cap, inner washer, outer washer, ferrule fitting; Blind nut is loop configuration, and small-bore one end compresses end cap, and heavy caliber one end has internal thread to connect gas tank body; End cap is cylindrical structural, has two threaded holes, a connecting sleeve joint, and another connects temperature sensor or pressure transducer, and gas tank body is tubular structure, and two ends have the external thread mated with blind nut; Inner washer is the rubber ring of cirque structure, is arranged in the groove on end cap sidewalls, plays main seal effect; Outer washer is the rubber ring of cirque structure, is arranged in the groove on endcap bosses step, plays auxiliary seal effect; Ferrule fitting one end has external thread to connect end cap, and the other end has external thread with coupling arrangement pipeline.
Gas tank body can be designed to the identical but body that length is different of four internal diameters, the gas tank body volume difference 1L of adjacent lengths, this design only need change the gas tank body of different length, corresponding gas tank volume can be obtained, save the material and expense of processing a whole set of gas tank, decrease the operation steps changing gas tank volume.
This body diameter of gas tank can be consistent with oxygen bomb, and blind nut of the present invention, inner washer, outer washer are all the accessories of oxygen bomb, can save material and processing charges to the recycling of waste and old oxygen bomb accessory.
Advantage of the present invention: gas tank of the present invention adopts the processing of NI-CR-MO alloys steel matter, and installation, dismounting and easy to clean are quick, solve corrosion and the leakage problem of other gunpowder specific volume measuring instruments; The present invention can change the system volume of gunpowder specific volume measuring instrument fast by the method changing different length gas tank body, other gunpowder specific volume measuring instruments of testable gunpowder kind analogy are more; The present invention can reduce the processing quantity of part, saves rapidoprint and processing charges.
Accompanying drawing explanation
The each parts annexation figure of Fig. 1 the present invention
The each parts connection diagram of Fig. 2 gas tank
Embodiment
Below in conjunction with drawings and Examples, the present invention is described in further detail.
The present invention implements with reference to Fig. 1, Fig. 2.The present invention is made up of oxygen bomb 1, vacuum pump 2, gas tank 3, pressure transducer 4, temperature sensor 5 and data acquisition unit 6; Described oxygen bomb 1 is the container of powder burning, vacuum pump 2 is for vacuumizing oxygen bomb 1 and device, gas tank 3 is for storing powder gas, pressure transducer 4 is for testing gaseous-pressure, temperature sensor 5 is for testing fuel gas temperature, and data acquisition unit 6 is for image data, process data outputing test result; The oxygen bomb vacuum pump 2 that gunpowder is housed is vacuumized, after igniting, oxygen bomb 1 is immersed in the water and cools, with vacuum pump 2 to other partial vacuum of the device except oxygen bomb 1, connect oxygen bomb 1 on proving installation, the numerical value of the pressure transducer 4 of gas tank 3 one end and the temperature sensor 5 of the other end is arranged on data acquisition unit 6 collection, the gunpowder specific volume testing software that data acquisition unit 6 is installed calculates gunpowder bulking value according to reader, and gunpowder specific volume measuring instrument of the present invention can test the bulking value comprising initiating explosive, propellant powder and propellant.
Described gas tank 3 is made up of two blind nut 3-1, two end cap 3-2, gas tank body 3-3, two inner washer 3-4, two outer washer 3-5, two ferrule fitting 3-6; Blind nut 3-1 is loop configuration, and small-bore one end compresses end cap 3-2, and heavy caliber one end has internal thread to connect gas tank body 3-3; End cap 3-2 is cylindrical structural, end cap 3-2 has two threaded holes, connecting sleeve joint 3-6, another connects temperature sensor 4 or pressure transducer 5, gas tank body 3-3 is tubular structure, two ends have the external thread mated with blind nut 3-1, be designed with four internal diameter is identical but the gas tank body 3-3 that length is different, the gas tank body 3-3 volume difference 1L of adjacent two length, the gas tank body 3-3 changing different length can change the volume of gas tank 3; Inner washer 3-4 is the rubber ring of cirque structure, is arranged in the groove on end cap 3-2 sidewall, plays main seal effect; Outer washer 3-5 is the rubber ring of cirque structure, is arranged in the groove on end cap 3-2 protrusion step, plays auxiliary seal effect; Ferrule fitting 3-6 one end has external thread to connect end cap 3-2, and the other end has external thread with coupling arrangement pipeline.
1, the assembling of gunpowder specific volume measuring instrument:
First gas tank 3 is installed, the external thread of two ferrule fitting 3-6, pressure transducer 4, temperature sensor 5 is wound around unsintered tape, to be installed on end cap 3-2 in corresponding threaded hole and to tighten, two inner washer 3-4, two outer washer 3-5 are respectively installed in groove corresponding to two end cap 3-2, two end cap 3-2 is installed on gas tank body 3-3, blind nut 3-1 to be installed on gas tank body 3-3 and to tighten, as Fig. 2. shown in.Then measuring instrument is assembled, oxygen bomb 1 and vacuum pump 2 are connected on the ferrule fitting 3-6 of gas tank 3 left side end cap 3-2 with the pipeline of band valve respectively, the pipeline of band valve is installed on the ferrule fitting 3-6 of end cap 3-2 on the right of gas tank 3, pressure transducer 4, temperature sensor 5 are connected on data acquisition unit 6, as Fig. 1. shown in.
2, gunpowder specific volume test philosophy:
Volume (water is gaseous state) after the powder burning of (101.325KPa, 273.15K) unit mass in normal conditions shared by gaseous products is called gunpowder specific volume, with V
1represent, unit is mL/g, and gunpowder specific volume computing formula is as follows:
Gunpowder sample bulking value V
1(ml/g), thermodynamic temperature T
0(273.15K), normal atmospheric pressure P
0(0.101325MPa), gaseous-pressure P
t(MPa), system volume V
t(mL), fuel gas temperature t (DEG C), the quality m (g) of gunpowder sample.
System volume V
t(mL) comprise oxygen bomb 1 volume, pipe volume and gas tank 3 volume, can record respectively by liquid standardization, three's sum is the system volume V of gunpowder specific volume measuring instrument
t.Gaseous-pressure P
t(MPa) and fuel gas temperature t (DEG C) data acquisition of pressure transducer 4 and temperature sensor 5 can be gathered by data acquisition unit 6.The quality m (g) of gunpowder sample is recorded by high accuracy number balance.According to specific volume computing formula, when calibration system volume, only need know quality m (g), the gaseous-pressure P of gunpowder sample
t(MPa) and fuel gas temperature t (DEG C) gunpowder bulking value can be calculated.
3, the bulking value of certain initiating explosive is tested:
Select the gas tank body 3-3 of volume 2L during test initiating explosive, oxygen bomb 1 and pipe volume are about 0.3L, and system volume is about 2.3L, take 2.0000g initiating explosive.
(1) device for opening power switch, debugging apparatus enters state to be tested;
(2) open data acquisition unit 6, put medicine specific volume detection calibration software of opening fire, parameters enters state to be collected;
(3) sample to be tested is loaded in oxygen bomb 1, tighten oxygen bomb 1;
(4) open vacuum pump 2, oxygen bomb 1 is evacuated to below 400Pa;
(5) oxygen bomb 1 is immersed in the water, and lights the sample in oxygen bomb 1, cooling 15min;
(6) take out oxygen bomb 1 and be connected to specific volume measuring instrument, be evacuated to below 400Pa;
(7) gas slowly in oxygen bomb 1 imports in the gas tank 3 of specific volume measuring instrument, leaves standstill 5min;
(8) click gunpowder specific volume testing software, the data that collection pressure transducer 4 and temperature sensor 5 record, calculate the bulking value of this test, store and record;
(9) by (2) to (8) operation, two test result deviations are no more than 6mL/g and are valid data;
(10) finally export or print specific volume test result.
4, the bulking value of certain propellant is tested:
Select the gas tank body 3-3 of volume 4L during testing and launching medicine, oxygen bomb 1 and pipe volume are about 0.3L, and system volume is about 3.3L, take 4.0000g propellant.
The bulking value of certain propellant is recorded by (1) to (10) operation.
5, the bulking value of certain propellant powder is tested:
Select the gas tank body 3-3 of volume 4L during testing and launching medicine, oxygen bomb 1 and pipe volume are about 0.3L, and system volume is about 4.3L, take 6.0000g propellant.
The bulking value of certain propellant powder is recorded by (1) to (10) operation.
Table 1. lists the specific volume test result of three kinds of different gunpowder, and test result display uses the gunpowder specific volume measuring instrument of transfiguration gas tank 3 can test the bulking value of multiple gunpowder.
The bulking value list of different gunpowder tested by table 1.
Claims (3)
1. a gunpowder specific volume measuring instrument, is characterized in that being made up of oxygen bomb (1), vacuum pump (2), gas tank (3), pressure transducer (4), temperature sensor (5) and data acquisition unit (6); Described oxygen bomb (1) is the container of powder burning, vacuum pump (2) is for vacuumizing oxygen bomb (1) and device, gas tank (3) is for storing powder gas, pressure transducer (4) is for testing gaseous-pressure, temperature sensor (5) is for testing fuel gas temperature, and data acquisition unit (6) is for image data, process data outputing test result; Described gas tank (3) is symmetrical, centre is gas tank body (3-3), and two ends are respectively blind nut (3-1), end cap (3-2), inner washer (3-4), outer washer (3-5), ferrule fitting (3-6); Blind nut (3-1) is loop configuration, and small-bore one end compresses end cap (3-2), and heavy caliber one end has internal thread to connect gas tank body (3-3); End cap (3-2) is cylindrical structural, have two threaded holes, a connecting sleeve joint (3-6), another connects temperature sensor (4) or pressure transducer (5), gas tank body (3-3) is tubular structure, and two ends have the external thread mated with blind nut (3-1); The rubber ring that inner washer (3-4) is cirque structure, is arranged in the groove on end cap (3-2) sidewall, plays main seal effect; The rubber ring that outer washer (3-5) is cirque structure, is arranged in the groove on end cap (3-2) protrusion step, plays auxiliary seal effect; Ferrule fitting (3-6) one end has external thread to connect end cap (3-2), and the other end has external thread with coupling arrangement pipeline.
2. gunpowder specific volume measuring instrument according to claim 1, it is characterized in that described gas tank body (3-3) has four, internal-and external diameter is identical but length different, gas tank body (3-3) the volume difference 1L of adjacent lengths.
3. gunpowder specific volume measuring instrument according to claim 1, is characterized in that the external diameter of described gas tank body (3-3) is consistent with oxygen bomb (1) with screw thread.
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN107677520A (en) * | 2017-11-21 | 2018-02-09 | 中国石油大学(北京) | A kind of natural gas sample collecting apparatus and acquisition method |
| CN111023918A (en) * | 2019-12-24 | 2020-04-17 | 景春阳 | Gunpowder gas pressure test calibration method |
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Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107677520A (en) * | 2017-11-21 | 2018-02-09 | 中国石油大学(北京) | A kind of natural gas sample collecting apparatus and acquisition method |
| CN107677520B (en) * | 2017-11-21 | 2023-10-20 | 中国石油大学(北京) | Natural gas sample collection device and collection method |
| CN111023918A (en) * | 2019-12-24 | 2020-04-17 | 景春阳 | Gunpowder gas pressure test calibration method |
| CN111023918B (en) * | 2019-12-24 | 2022-02-25 | 中国人民解放军63856部队 | Gunpowder gas pressure test calibration method |
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| CN105277670B (en) | 2017-05-17 |
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