A laboratory small-dose detection method for the transportation safety of single-stock potassium propellant

Abstract

The present invention discloses a transport safety test device for stockpiled single-potassium propellants, comprising a reaction bottle arranged on a fixed frame, and also comprising a thermostat and a vibrator; the thermostat is arranged above the vibrator, and is used to heat the reaction bottle filled with single-potassium propellants; the test device also comprises a gas chromatograph. The present invention also discloses a laboratory small-dose detection method for the transport safety of stockpiled single-potassium propellants, which is implemented by the above-mentioned transport safety test device for stockpiled single-potassium propellants; the volume content of CO2 and the volume content of N2O in the decomposition gas of the single-potassium propellant are detected after the heating and vibration test, and the transport safety of the stockpiled single-potassium propellant is determined. The inventive method simultaneously considers the influence of the dual environmental factors of heat and vibration on the single-potassium propellant in road transportation, and the test results can accurately characterize the actual situation of the stockpiled single-potassium propellant in transportation, and finally the transport safety of the stockpiled single-potassium propellant can be confirmed.

Description

Technical Field

[0001] The invention belongs to the field of physical and chemical testing of gunpowder, relates to safety testing of single-potassium propellant, and in particular to a laboratory small-dose testing method for transportation safety of stocked single-potassium propellant. Background Art

[0002] Gunpowder includes propellant and solid propellant. Most gunpowder products need to be stored for a long time before use or destruction. The energetic substances such as nitrocellulose NC and nitroglycerin NG in gunpowder are slowly decomposing even at room temperature. The decomposed nitrogen oxides can in turn catalyze this decomposition. Therefore, a small amount of stabilizer is added to the gunpowder formula. The stabilizer reduces the decomposition rate of gunpowder by absorbing nitrogen oxides, allowing it to be stored for a longer time. However, the absorption capacity of the stabilizer is limited. When the stabilizer content decreases and the ability to absorb nitrogen oxides decreases to a certain extent, the decomposition rate of the gunpowder increases, the chemical stability decreases, and the danger increases, and it cannot continue to be stored.

[0003] Propellants containing only one energy component, nitrocellulose NC, are called single-base propellants. Single-base propellants with rosin added are called single-pine propellants, and single-base propellants with rosin and potassium sulfate added are called single-pine potassium propellants. Single-pine potassium propellants are used as flame extinguishers in the propellant charge of artillery shells.

[0004] Single-base propellant, single-rosin propellant and single-rosin potassium propellant were used as samples, and the three samples were subjected to accelerated thermal aging at 95, 85, 75 and 65°C, respectively. The changes in the stabilizer content were tracked and measured. The 50% consumption of the stabilizer was used as the critical point of the safe storage life. The Besselot equation was used for extrapolation, and the safe storage life of single-base propellant, single-rosin propellant and single-rosin potassium propellant at room temperature (25°C) was estimated to be 43.5 years, 21.9 years and 11.3 years, respectively. The above results show that the safe storage life of single-rosin potassium propellant is significantly reduced after adding rosin and potassium sulfate. Therefore, compared with other single-base propellants, single-rosin potassium propellant has a shorter storage period in the warehouse, will become expired gunpowder more quickly, and has a higher probability of needing to be transported out of the warehouse.

[0005] The potassium-single-carbamide propellant in stock can be transported by road or rail. Relatively speaking, the higher flexibility of road transportation makes it more suitable for the transportation of dangerous goods. In order to determine whether the potassium-single-carbamide propellant can be safely transported, it will be tested before expiration to determine its transportation safety. The existing determination method only considers the two stresses of heat or vibration (friction, impact) that the propellant is subjected to, and cannot accurately characterize the actual conditions to which the propellant is subjected during transportation. Moreover, mechanical energy is converted into thermal energy during sample processing, the sample temperature increases, and the decomposition rate accelerates. The sample processing method destroys the stability of the sample, and it is easy to misjudge samples with qualified stability as unqualified samples. Therefore, there is an urgent need for a method that can quickly judge the transportation safety of potassium-single-carbamide propellants in stock. Summary of the invention

[0006] In order to solve the deficiencies in the prior art, the present invention provides a laboratory small-dose detection method for the transportation safety of inventory single-potassium propellant, so as to determine the transportation safety of inventory single-potassium propellant.

[0007] In order to solve the above technical problems, the present invention adopts the following technical solutions to achieve the above problems:

[0008] The invention discloses a laboratory small-dose detection method for the transportation safety of a single-potassium propellant in stock, comprising the following steps:

[0009] Step 1, prepare an empty reaction bottle, a first reaction bottle filled with monosporin potassium propellant, and a second reaction bottle, and obtain the CO2 content of the gas in the empty reaction bottle;

[0010] Step 2, performing n heating vibration tests on the first reaction bottle and the second reaction bottle, wherein n is a positive integer ≤ 7; obtaining the CO2 volume content and the N2O volume content of the gas in the first reaction bottle and the gas in the second reaction bottle after each heating vibration test, and then obtaining the CO2 volume content and the N2O volume content of the decomposition gas of the single potassium propellant in the first reaction bottle and the decomposition gas of the single potassium propellant in the second reaction bottle after each heating vibration test;

[0011] During the n heating vibration tests, if one of the following test termination conditions is met, the test is terminated;

[0012] The test termination conditions include:

[0013] The volume content of CO2 in the decomposition gas of the monosodium pyrophosphate propellant in the first reaction bottle is ≥4.00%;

[0014] The volume content of N2O in the decomposition gas of the mono-pine potassium propellant in the first reaction bottle is ≥ 0.35%;

[0015] The volume content of CO2 in the decomposition gas of the monosodium potassium propellant in the second reaction bottle is ≥4.00%;

[0016] The volume content of N2O in the decomposition gas of the monosodium potassium propellant in the second reaction bottle is ≥ 0.35%;

[0017] When the test is terminated when one of the test termination conditions is met, the transportation safety of the single-potassium propellant in stock is determined to be n;

[0018] When the number of repeated tests reaches n=7 and none of the above termination conditions is met, it is determined that the transportation safety of the inventory single-potassium propellant is greater than 7.

[0019] Furthermore, the single pine potassium propellant includes a single-hole tubular charge with an outer diameter of 4.5mm to 5.5mm, a combustion layer thickness of 0.9mm to 1.1mm, and a length of ≥100mm.

[0020] Furthermore, the heating temperature of the heating vibration test is 70° C. to 72° C., the vibration time is 7 hours to 9 hours, the vibration frequency is 9 Hz to 11 Hz, and the amplitude is 15 mm to 25 mm.

[0021] Furthermore, the CO2 volume content of the decomposition gas of the single potassium propellant in step 2 = the CO2 volume content in the reaction bottle measured after the heating and vibration test - the CO2 volume content of the gas in the empty reaction bottle; the N2O volume content of the decomposition gas of the single potassium propellant = the N2O volume content in the reaction bottle measured after the heating and vibration test.

[0022] Furthermore, the filling mass of the mono-potassium propellant in the first reaction bottle and the second reaction bottle is 9.5g to 10.5g.

[0023] Furthermore, the method is implemented by a transport safety test device for single-potassium propellant in stock, the test device comprising a reaction bottle arranged on a fixed frame, a thermostat and a vibrator, wherein the thermostat is arranged above the vibrator and is used to heat the reaction bottle filled with single-potassium propellant;

[0024] The test apparatus also includes a gas chromatograph.

[0025] Furthermore, the reaction bottle includes a bottle body with a cavity therein and a bottle cap matching the bottle body; a sealing gasket is arranged in the bottle cap; a buffer sleeve is arranged outside the bottle body, and a through pore is opened at the center of the upper surface of the bottle cap.

[0026] Furthermore, the wall thickness of the bottle body (11) is 1 mm, the outer diameter is 20 mm, and the outer height is 120 mm; the outer height of the bottle cap (12) is 15 mm, the wall thickness is 1 mm, the wall thickness of the buffer sleeve (13) is 1.5 mm, the inner diameter is 20 mm, and the height is 80 mm; the thickness of the sealing gasket is 1.5 mm.

[0027] Furthermore, the thermostat includes a box cover, a thermostat box and a heating base, the thermostat box is arranged on the heating base, and the box cover and the thermostat box can be sealed and connected.

[0028] The fixing frame includes a lofting circular plate, a connecting rod and a circular mesh plate; the lofting circular plate is horizontally arranged and connected to a circular mesh plate horizontally arranged below the lofting circular plate through a connecting rod; a plurality of lofting holes are equidistantly arranged along the circumference of the lofting circular plate; the upper end of the connecting rod passes through the lofting circular plate connecting handle, and the lower end of the connecting rod passes through the circular mesh plate connecting support foot.

[0029] Compared with the prior art, the present invention has the following beneficial effects:

[0030] (1) The method of the present invention is specifically designed for the safety detection of the transportation of single-pine potassium propellant, can simulate the transportation conditions of single-pine potassium propellant, has a simple structure, and is easy to use.

[0031] (2) The method of the present invention simultaneously takes into account the influence of both heat and vibration environmental factors on the single-potassium propellant during road transportation. The test results can accurately characterize the actual situation of the single-potassium propellant in stock during transportation, and ultimately confirm the transportation safety of the single-potassium propellant in stock.

[0032] (3) The method of the present invention is gentle in the sample processing method during the heating vibration experiment. For the single-pine potassium propellant that has been stored for many years and is hard and brittle due to the reduction of plasticizers, the sample processing causes less damage to the sample, that is, the sample processing method does not damage the stability of the sample, which greatly reduces the occurrence of samples that are qualified in stability being misjudged as unqualified samples due to improper sample processing.

[0033] (4) The method of the present invention can be used to compare the transportation safety of the stock of potassium propellants stored under different storage conditions, which helps relevant personnel to coordinate the multi-location destruction of potassium propellants with different stability according to the destruction capacity of each destruction point.

[0034] Other advantages of the present invention are described in detail in the detailed description. BRIEF DESCRIPTION OF THE DRAWINGS

[0035] Figure 1 It is a schematic diagram of the structure of the device of the present invention;

[0036] Figure 2 is a schematic structural diagram of the fixing frame in Example 1;

[0037] Figure 3 is a schematic diagram of the structure of the reaction bottle in Example 1;

[0038] Description of the symbols in the figure:

[0039] 1-reaction bottle, 2-fixed frame, 3-thermostat, 4-vibrator, 5-gas chromatograph; 11-bottle body, 12-bottle cover, 13-buffer sleeve; 21-lofting circular plate, 22-connecting rod, 23-circular mesh plate; 31-box cover, 32-thermostat, 33-heating base. DETAILED DESCRIPTION

[0040] The following are specific embodiments of the present invention. It should be noted that, in the description of the present invention, unless otherwise clearly specified and limited, the terms "set", "connection" and the like should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection or an integrated connection; it can be a direct connection or an indirect connection, etc. For ordinary technicians in this field, the specific meanings of the above terms in this technical solution can be understood according to specific circumstances.

[0041] In the present application scheme, the determined transportation safety value of the inventory single-potassium propellant can determine whether the inventory single-potassium propellant has begun to deteriorate. The determined safety value indicates that if the inventory single-potassium propellant continues to be heated and vibrated, it will cause the risk of combustion and explosion, that is, the determined transportation safety value of the inventory single-potassium propellant corresponds to the number of safe transportation days of the inventory single-potassium propellant. For example, if transportation safety = 6, it means that the transportation safety days of the inventory single-potassium propellant are 6 days, and transportation risks may occur on the 7th day; if transportation safety is greater than 7, it means that the transportation safety days of the inventory single-potassium propellant are greater than 7 days; the greater the transportation safety, the safer the transportation of the inventory single-potassium propellant.

[0042] The single-pine potassium propellant in stock is transported by road, and the transportation time is generally not more than 7 days. The main environmental factors affecting the propellant are heat, moisture, vibration, etc. These propellants are wrapped in multi-layer packaging. Within 7 days, there will not be much moisture penetrating the packaging and directly contacting the propellant, so moisture is excluded. However, the vibration caused by complex road conditions will cause friction and extrusion between the single-pine potassium propellant tubes, which will be converted into heat energy, increasing the hot spots of the propellant, and the hot spots can increase the chemical decomposition rate of the propellant, so vibration factors need to be considered. On the other hand, the open-air ambient temperature during transportation may be as high as 50°C or above. If it is directly exposed to sunlight, its surface temperature can reach more than 70°C, and the increase in temperature can increase the chemical reaction rate of explosives. Under normal circumstances, the chemical reaction temperature coefficient of explosives is r 10 =3~4, that is, for every 10℃ increase in temperature, the time required to reach the same degree of reaction will be shortened by 3~4 times. Therefore, when determining the transportation safety of the single-pine potassium propellant in stock, the main environmental factors to be considered are vibration and temperature.

[0043] Determination of vibration type: During the transportation of propellants, vibration is an inevitable part. Conventional cargo vibration testing simulates the dynamic impact of transportation vehicles on cargo during the circulation of cargo. However, conventional cargo vibration testing mainly targets physical damage to cargo, and does not consider the chemical impact of vibration converted into thermal stress on cargo, nor does it consider the chemical impact of environmental thermal factors on cargo.

[0044] Common vibration types include sinusoidal vibration and random vibration. Sinusoidal vibration is mainly used to find resonance points in the R&D design stage and to optimize cargo to avoid resonance points. Random vibration is used in the laboratory to simulate the vibration during actual transportation. Random vibration is closer to the vibration hazards generated by the actual transportation environment.

[0045] The environment of road transportation is a broadband vibration, which is caused by the combined effect of the support of the vehicle body, the structural domain and the flatness of the road surface. Through the data analysis and processing of automobile transportation vibration obtained by actual measurement of a large number of sports cars, it can be concluded that transportation vibration has the following characteristics:

[0046] a. Automobile transportation vibration is broadband random vibration, and the instantaneous value of vibration basically satisfies the normal distribution.

[0047] b. The energy of automobile transportation vibration is mainly distributed in the frequency range of 0 to 200 Hz, and the energy is more concentrated in the frequency range of 0 to 20 Hz.

[0048] c. The shape of the auto-power spectrum of automobile transportation vibration at different frequencies does not change much. The general trend is that the random frequency increases; the auto-power spectrum density gradually decreases, and peaks appear around 2Hz and 10Hz.

[0049] d. The vibration value (total effective value) of the car's bottom plate varies with different positions, directions, loads, road surfaces and vehicle speeds.

[0050] Since the main focus is on the destructive effect of vibration during road transportation on the stability of single-pine potassium propellant, the vibration type is determined to be random vibration.

[0051] The stability of single-potassium propellant is mainly chemical stability, which refers to the ability to delay decomposition and prevent automatic chemical changes during storage. The nitrate group of NC in single-potassium propellant can slowly decompose by itself, and the gaseous decomposition products (such as NO2, NO, water vapor and HNO3) have a catalytic effect on the thermal decomposition of NC, and even increase the decomposition rate of NC by dozens of times.

[0052] Different gaseous decomposition products have different effects on the decomposition of NC. NO2 will directly accelerate the oxidative decomposition of NC (NO2 will become NO after oxidation with NC, and NO will become NO2 again after further oxidation). At the same time, the inorganic acid generated by NO2 and water can also accelerate the hydrolysis reaction of NC.

[0053] Increasing the temperature can accelerate the decomposition of NC. For example, at (70-130)℃, the decomposition rate of NC increases with the increase of temperature. When the temperature rises to above 140℃, the decomposition of NC becomes very intense. The purpose of this test is to determine the road transportation safety of single-pine potassium propellant. If the sample heating temperature is low during the test, after heating and vibration for 7 times, the stability of single-pine potassium propellants in different inventories does not change significantly, and it is difficult to distinguish their transportation safety; if the heating temperature is too high, the reaction mode of NC at too high temperature is different from the actual reaction mode during transportation. Therefore, the sample heating temperature should not be too low or too high.

[0054] The decomposition gas content detection can detect both CO2 and N2O gases at the same time, so double checks can be made when judging the results. Therefore, the parameters to be measured are determined to be the content of two characteristic decomposition gases. When the stabilizer works, there is almost no N2O in the decomposition gas of the single-pine potassium propellant; when the stabilizer does not work (that is, the chemical stability changes significantly, and there is a greater risk in the transportation of single-pine potassium propellant), obvious N2O appears in the decomposition gas. However, CO2 is always present during the entire decomposition process, and the CO2 content is in a corresponding relationship with the degree of decomposition.

[0055] The present invention is not limited to the following specific embodiments. The specific technical features described in the following specific embodiments can be combined in any suitable manner without contradiction. As long as they do not violate the concept of the present invention, they should also be regarded as the contents disclosed by the present invention.

[0056] Example 1

[0057] This embodiment discloses a laboratory small-dose detection method for the transportation safety of single-potassium propellant in stock, which is implemented using the test device disclosed in Example 1 and includes the following steps:

[0058] Step 1, prepare an empty reaction bottle, a first reaction bottle filled with monosporin potassium propellant, and a second reaction bottle, and obtain the CO2 content of the gas in the empty reaction bottle;

[0059] Place the processed single-pine potassium propellant sample into a reaction bottle, place the reaction bottle in the sample hole of the fixed frame, and then place the fixed frame into the thermostat of the thermostat. If the temperature distribution in the thermostat is uneven, the sample heating temperature will inevitably be inaccurate. Therefore, during the test, the structural layout in the thermostat should be equivalent to the state during temperature calibration. The simplest operation method is determined as: "When there are less than 6 reaction bottles filled with propellant, put in an empty reaction bottle so that there is a reaction bottle in each sample hole of the fixed frame." When calibrating the temperature of the thermostat, it is also necessary to ensure that there is an empty reaction bottle in each sample hole.

[0060] Step 2, performing n heating vibration tests on the first reaction bottle and the second reaction bottle, wherein n is a positive integer ≤ 7; obtaining the CO2 volume content and the N2O volume content of the gas in the first reaction bottle and the gas in the second reaction bottle after each heating vibration test, and then obtaining the CO2 volume content and the N2O volume content of the decomposition gas of the single potassium propellant in the first reaction bottle and the decomposition gas of the single potassium propellant in the second reaction bottle after each heating vibration test;

[0061] During the n heating vibration tests, if one of the following test termination conditions is met, the test is terminated;

[0062] The test termination conditions include:

[0063] The volume content of CO2 in the decomposition gas of the monosodium pyrophosphate propellant in the first reaction bottle is ≥4.00%;

[0064] The volume content of N2O in the decomposition gas of the mono-pine potassium propellant in the first reaction bottle is ≥ 0.35%;

[0065] The volume content of CO2 in the decomposition gas of the monosodium potassium propellant in the second reaction bottle is ≥4.00%;

[0066] The volume content of N2O in the decomposition gas of the monosodium potassium propellant in the second reaction bottle is ≥ 0.35%;

[0067] When the test is terminated when one of the test termination conditions is met, the transportation safety of the single-potassium propellant in stock is determined to be n;

[0068] When the number of repeated tests reaches n=7 and none of the above termination conditions is met, it is determined that the transportation safety of the inventory single-potassium propellant is greater than 7.

[0069] According to experience, when the CO2 volume content of the decomposition gas is ≥4.00% or the N2O volume content is ≥0.35%, the stabilizer content has often dropped by more than 50%, and the sample is determined to be a dangerous product.

[0070] Therefore, "the volume content of CO2 in the decomposition gas ≥4.00% or the volume content of N2O ≥0.35%" is used as the criterion for a significant change in the stability of the sample.

[0071] To be conservative, if one of the two parallel samples shows a significant change in stability, the heating and vibration test will not be continued. In this implementation plan, one heating and vibration test is equivalent to one day of transportation. If the stability of the sample after heating and vibration n times changes significantly, its transportation safety is confirmed to be n, which is equivalent to transportation for n days, that is, the value of n is equal to the number of safe transportation days. The larger the value of n, the farther the single potassium propellant can be transported.

[0072] Propellants with good stability can be heated and vibrated more times (in this scheme, each heating and vibration represents one day of transportation). The more times the heating and vibration are performed, the more the stability of different samples can be distinguished, but more test cycles mean greater time costs. Usually, the mileage of road transportation is 1600-2400 km, and the longest 2400 km is calculated: assuming that the gravel road is 1000 km and the flat road section is 1400 km, the speed of the dangerous goods transport vehicle on the gravel section is 35 km / h and the speed on the flat road is about 80 km / h, and the transport time of the transport vehicle is 8 hours per day. It is calculated that the required transportation time is 5.8 days. Taking into account some other influencing factors, the maximum number of heating and vibration of the sample is determined to be 7 times, and each heating and vibration is 8 hours. If the chemical stability of the propellant has not changed significantly after 7 heating and vibrations, there is no need to continue the heating and vibration test.

[0073] As a preferred solution of this embodiment: the single potassium pine propellant includes a single-hole tubular charge with an outer diameter of 4.5-5.5 mm, a combustion layer thickness of 0.9-1.1 mm, and a length of ≥100 mm.

[0074] In order to avoid misjudging the stability-qualified single-potassium propellant as unqualified due to unreasonable sample processing, large external force should not be used to destroy the integrity of the sample (such as crushing or grinding). This is because: the single-potassium propellant with expired inventory is hard and brittle, and excessive processing force (such as crushing or grinding) will "tear" off a large number of NC molecular chains in the propellant, converting mechanical energy into higher heat energy, which not only changes the physical and chemical state of the sample, but also reduces the stability of the sample.

[0075] Therefore, the preferred solution in the method of the present invention is: processing the single potassium propellant into a 100 mm long propellant tube with two flat ends to minimize the damage to the stability of the single potassium propellant during sample processing.

[0076] As a preferred solution of this embodiment, the heating temperature of the heating vibration test is 70° C. to 72° C., the vibration time is 7 hours to 9 hours, the vibration frequency is 9 Hz to 11 Hz, and the amplitude is 15 mm to 25 mm.

[0077] During the test, if the sample heating temperature is low, after heating and vibration 7 times, the stability of different stock single potassium propellants will not change significantly, making it difficult to distinguish their transportation safety; if the heating temperature is too high, the reaction mode of NC under high temperature is different from the actual reaction mode during transportation.

[0078] Therefore, the sample heating temperature should be neither too low nor too high, the optimal heating temperature is 71 °C, and the vibration time is 8 hours.

[0079] As a preferred scheme of this embodiment, the CO2 volume content of the decomposition gas of the single pine potassium propellant described in step 2 = the CO2 volume content in the reaction bottle measured after the heating and vibration test - the CO2 volume content of the gas in the empty reaction bottle; the N2O volume content of the decomposition gas of the single pine potassium propellant = the N2O volume content in the reaction bottle measured after the heating and vibration test.

[0080] As a preferred solution of this embodiment, the filling mass of the monopotassium propellant in the first reaction bottle and the second reaction bottle is 9.5-10.5g.

[0081] The following aspects should be considered when determining the sample weight:

[0082] a. The sample weight is too small, and the decomposition gas produced by the propellant when heated is too little, which may be below the detection limit of gas chromatography and cannot be detected;

[0083] b. The sample weight is too large. The propellant decomposes too violently due to factors such as heat accumulation. For the mono-potassium propellant in stock with reduced stability, a large sample weight poses a safety hazard.

[0084] c. The testing laboratory has quantitative requirements for explosives, which is a hard indicator and is mainly to ensure safety;

[0085] d. Several propellant samples can be tested at the same time. Relatively speaking, the smaller the weight of a single sample, the more samples can be heated and vibrated at the same time, and the higher the detection efficiency.

[0086] In this embodiment, the preferred sample weight is about 10 g.

[0087] Single pine potassium propellant is a single-hole tubular propellant with an outer diameter of 5mm, a combustion layer thickness of 1mm, and a length of ≥100mm. The true density is 1.60g / cm 3 ~1.63g / cm 3 After being processed to a length of 100mm, the mass of each cartridge is 2.01g~2.05g, and the total mass of the 5 processed cartridges is about 10g. The density of the single rosin potassium propellant in long-term inventory will decrease due to the reduction of rosin. Taking all factors into consideration, the sample weighing range is determined to be 9.5g~10.5g. Even if the propellants are produced in the same process and the same batch, their size and mass will vary. Therefore, when the total mass of the 5 cartridges cannot be within the range of 9.5g~10.5g, they can be "replaced with other cartridges of the propellant so that the total mass of the 5 cartridges is within the range of 9.5g~10.5g".

[0088] like Figures 1 to 3As shown, the detection method is implemented by using a transport safety test device for single-potassium propellant in stock, the test device includes a reaction bottle 1 set on a fixed frame 2, and also includes a thermostat 3 and a vibrator 4, the thermostat 3 is set above the vibrator 4, and is used to heat the reaction bottle 1 filled with single-potassium propellant;

[0089] The test device also includes a gas chromatograph 4, which is used for gas detection.

[0090] As a preferred solution of this embodiment, the reaction bottle 1 includes a bottle body 11 with a cavity therein and a bottle cap 12 matching the bottle body 11, wherein a sealing gasket is arranged inside the bottle cap 12; a buffer sleeve 13 is arranged outside the bottle body 11, and a through pore is opened at the center of the upper surface of the bottle cap 12.

[0091] As a preferred solution of this embodiment, the wall thickness of the bottle body 11 is 1 mm, the outer diameter is 20 mm, and the outer height is 120 mm; the outer height of the bottle cap 12 is 15 mm, the wall thickness is 1 mm, the wall thickness of the buffer sleeve 13 is 1.5 mm, the inner diameter is 20 mm, and the height is 80 mm; the thickness of the sealing gasket is 1.5 mm.

[0092] In order to minimize the damage to the structural integrity of the mono-pine potassium propellant, the length of the test column is 100 mm, so the height of the reaction bottle should match it. The diameter of the reaction bottle should be neither too large nor too small. If the diameter is too large, the space in the reaction bottle is too large, and the gas concentration in the bottle is too low and not easy to be detected; if the diameter is too small, the sample cannot be fully vibrated, and it will also make it difficult to disassemble and assemble the sample during the test.

[0093] In this embodiment, the bottle body 11 and the bottle cap 12 are connected by threads. The upper outer wall of the bottle body 11 is provided with an external thread, the inner wall of the bottle cap 12 is provided with an internal thread matching the external thread of the bottle body 11, and a sealing gasket made of silicone rubber is provided inside the bottle cap 12. When the bottle cap 12 and the bottle body 11 are tightened, the bottle cap 12 and the inside of the bottle body 11 become a closed space.

[0094] As a preferred solution of this embodiment, the thermostat 3 includes a box cover 31, a thermostat box 32 and a heating base 33; the thermostat box 32 is arranged on the heating base, and the box cover 31 and the thermostat box 32 can be sealed and connected.

[0095] The box cover 31 is composed of a box cover body and a box cover metal shell; the box cover body includes two layers, the lower layer is a buffer fastening layer, which is composed of silicone rubber and has a thickness of 10mm; the upper layer is an insulation layer, which is composed of asbestos and has a thickness of 20mm; the side and top surface of the box cover body are wrapped with the box cover metal shell, and the shell layer of the box cover metal shell has a thickness of 2mm;

[0096] The thermostatic box 32 is cylindrical in shape, with a height of 136 mm, an inner diameter of 170 mm, and an outer diameter consistent with the outer diameter of the box cover 31; the wall of the thermostatic box 32 includes a 1 mm thick inner layer of a metal wall plate, a 20 mm thick asbestos middle layer, and a 2 mm thick metal outer layer, which are bonded from the inside to the outside;

[0097] The box cover 31 is located directly above the thermostatic box 32, and the box cover 31 and the thermostatic box 32 are not connected; the box cover 31 and the thermostatic box 32 can be connected by a connector, such as by setting a matching lock connection on the box cover 31 and the thermostatic box 32; the heating base is an oblate cylinder, and the heating base 33 is 120 mm high and has an outer diameter consistent with the thermostatic box 32;

[0098] A heating device is installed inside the heating base 33, which adopts electric heating; the upper surface of the heating base 33 is covered with a 1mm thick metal plate; the side and bottom surfaces of the heating base 33 are sequentially laminated with a 20mm thick asbestos layer and a 2mm thick metal shell from the inside to the outside;

[0099] The thermostat 3 is directly above the vibrator 4 , and the thermostat 3 is not connected to the vibrator 4 ; the thermostat 3 is fixed on the vibrator 4 by a clamp.

[0100] As a preferred solution of this embodiment, the fixed frame 2 includes a lofting circular plate 21, a connecting rod 22 and a circular mesh plate 23; the lofting circular plate 21 is horizontally arranged and connected to the circular mesh plate 23 horizontally arranged below the lofting circular plate 21 through the connecting rod 22, and a plurality of lofting holes are equidistantly arranged along the circumferential direction on the lofting circular plate, the upper end of the connecting rod 22 passes through the lofting circular plate 21 to connect to the handle, and the lower end of the connecting rod 22 passes through the circular mesh plate 23 to connect to the support leg.

[0101] Preferably, the handle is n-shaped; the lofting circular plate 21 and the circular mesh plate 23 are arranged in mirror symmetry, the diameters of the lofting circular plate 21 and the circular mesh plate 23 are both 160mm, the thickness of the lofting circular plate 21 is 2mm, and the circular mesh plate 23 is made of mesh with a diameter of 2mm and a mesh spacing of 2mm; the diameter of the lofting hole is 24mm, the distance between the center of the lofting hole and the center of the lofting circular plate 21 is 45mm, the lofting holes are equidistantly distributed along the circumference, and there are 6 connecting rods 22 with a diameter of 5mm and a height of 68mm, which are vertically arranged; the distance between the axis of the connecting rod and the center of the lofting circular plate is 70mm; the axis of the 6 connecting rods 22 overlaps with the axis of the 6 vertical parts of the 3 n-shaped handles respectively; the support foot is cylindrical with a diameter of 5mm and a height of 13mm.

[0102] The gas chromatograph 5 is used to detect the gas in the reaction bottle.

[0103] When manually using a sampling needle to collect gas and inject it into a chromatograph, problems such as leakage and poor repeatability of the sampling action often occur, which is too dependent on the operator's level and has a large impact on the human factor. In order to reduce such factors affecting the test results, the present invention adopts technical means such as a gas collection device, a vacuum pump, and a quantitative tube. The operator only needs to insert the sampling needle of the gas collection device into the reaction bottle, and the gas chromatograph can automatically extract the decomposition gas for detection, thereby minimizing the error caused by human operation.

[0104] Generally, when using a gas chromatograph to detect gas, the same gas is required to be injected 2 to 3 times. When the chromatographic peak changes by ≤5%, the entire gas detection system (including gas sampling) is considered to be stable. However, the reaction bottle in this test is closed. Due to negative pressure, continuous extraction of gas from the reaction bottle will result in a trend of gradually decreasing gas volume. Therefore, the method of continuously extracting gas from the reaction bottle can no longer be used to determine the stability of the system.

[0105] In summary, in this embodiment, when judging the state of the gas detection system, the method of "pumping the indoor gas from the gas sampling device into the quantitative tube, then injecting it into the chromatographic column for separation, detecting it with a thermal conductivity detector, and finally recording the chromatographic peak areas of oxygen and nitrogen; performing gas sampling and detection multiple times in succession; assuming that the chromatographic peak areas of oxygen and nitrogen detected by two consecutive samplings are marked as S1 and S2 respectively, and setting θ=|S1-S2|×2÷(S1+S2), when θ≤5%, judging that the instrument state is stable" is adopted.

[0106] The heating vibration test process of the test device is as follows:

[0107] Load the stock mono-potassium propellant into the reaction bottle 1, put the reaction bottle 1 that needs heating and vibration treatment into the fixing frame 2, and then put the fixing frame into the thermostat 3 placed on the vibrator 4, complete the heating and vibration test according to the set parameters, take out the reaction bottle after the test and cool it to room temperature, then use the gas chromatograph to detect the gas in the reaction bottle and record the detection data.

[0108] Application Example 1

[0109] This application example adopts the test method disclosed in Example 2, and selects 200g of a single pine potassium propellant (outer diameter 5mm, combustion layer thickness 1mm, length ≥100mm, single-hole tubular) that has been in stock for 5 years; divides it into 2 parts, and uses heat aging to reduce the stabilizer content in each part.

[0110] The first portion of stabilizer content is reduced to 0.4%, which is called 1# sample; then two 1# sample samples are prepared, named parallel sample 1 and parallel sample 2, and are placed in two reaction bottles 1 respectively; the sample mass of parallel sample 1 is 10.12g, and the sample mass of parallel sample 2 is 10.38g;

[0111] The second portion of stabilizer content is reduced to 0.2%, which is called 2# sample; then two 2# sample samples are prepared, named parallel sample 3 and parallel sample 4, and are placed in two reaction bottles 1 respectively; the sample mass of parallel sample 3 is 10.41g, and the sample mass of parallel sample 4 is 10.26g;

[0112] Three empty reaction bottles 1 without medicine are assembled, two of which are placed in the sample holes of the fixed frame 2 together with the four reaction bottles 1 containing four samples, ensuring that the six sample holes for placing reaction bottles are all filled with reaction bottles 1 to ensure uniform heating. Another empty reaction bottle 1 is used for detection.

[0113] If the temperature distribution in the thermostat 32 is uneven, the sample heating temperature will inevitably be inaccurate. Therefore, during the test, the structural layout in the thermostat 32 should be equivalent to the state during the temperature calibration. "When there are less than 6 reaction bottles 1 filled with propellant, put in an empty reaction bottle 1 so that there is a reaction bottle 1 in each sample hole of the fixed frame 2." When the thermostat 32 is temperature calibrated, it is also necessary to ensure that there is an empty reaction bottle 1 in each sample hole.

[0114] 1. Place the fixed rack 2 with 6 reaction bottles 1 into the thermostat 3, heat the thermostat 3 to 71°C, and after the temperature stabilizes, set the vibrator 4 to the random vibration mode, and start heating and vibration; stop heating and vibration after 8 hours, remove the box cover 31, take out the fixed rack 2, cool to room temperature, and wait for detection;

[0115] 2. Turn on the gas chromatograph 5, set the temperature of the thermal conductivity detector to 250°C and the temperature of the chromatographic column to 80°C; after the instrument is stable, turn on the vacuum pump of the gas chromatograph 5 workstation to extract the indoor gas into the quantitative tube, then inject it into the chromatographic column for separation and detect it with the thermal conductivity detector, and finally record the chromatographic peak areas of oxygen and nitrogen; the gas chromatograph 5 continuously samples gas for detection; suppose the chromatographic peak areas of oxygen and nitrogen detected for two consecutive times are S1 and S2 respectively, let θ=|S1-S2|×2÷(S1+S2), when θ≤5%, start detecting the empty reaction bottle 1 and the parallel sample;

[0116] The gas chromatograph 5 first extracts the gas in the empty reaction bottle 1 to detect the CO2 content; the CO2 content of the gas in the empty reaction bottle is only detected once;

[0117] Then, the four reaction bottles 1 containing parallel samples and subjected to heating and shaking treatment were subjected to gas extraction detection, and the detection results were as follows:

[0118] The test results of the two reaction bottles containing sample 1# are:

[0119] The volume content of CO2 in parallel sample 1 is C(CO2)=0.26%, and the volume content of N2O is C(N2O)=0.03%.

[0120] The volume content of CO2 in parallel sample 2, C(CO2)=0.23%, and the volume content of N2O, C(N2O)=0.03, did not meet the test termination conditions;

[0121] The test results of the two reaction bottles containing sample 2# are as follows:

[0122] The volume content of CO2 in parallel sample 3 is C(CO2)=0.28%, and the volume content of N2O is C(N2O)=0.02%.

[0123] The volume content of CO2 in parallel sample 4 is C(CO2)=0.25%, and the volume content of N2O is C(N2O)=0.03%; the test termination condition is not met;

[0124] Then, the second heating vibration test was carried out and tested, and the test results were as follows:

[0125] The test results of the two reaction bottles containing sample 1# are:

[0126] The volume content of CO2 in parallel sample 1 is C(CO2)=0.20%, and the volume content of N2O is C(N2O)=0.03%.

[0127] The volume content of CO2 in parallel sample 2 is C(CO2)=0.25%, and the volume content of N2O is C(N2O)=0.04%; the test termination conditions are not met;

[0128] The test results of the two reaction bottles containing sample 2# are as follows:

[0129] The volume content of CO2 in parallel sample 3 is C(CO2)=0.39%, and the volume content of N2O is C(N2O)=0.04%.

[0130] The volume content of CO2 in parallel sample 4 is C(CO2)=0.35%, and the volume content of N2O is C(N2O)=0.04%; the test termination conditions are not met;

[0131] The third heating vibration test was carried out and tested, and the test results are as follows:

[0132] The test results of the two reaction bottles containing sample 1# are:

[0133] The volume content of CO2 in parallel sample 1 is C(CO2)=0.36%, and the volume content of N2O is C(N2O)=0.04%.

[0134] The volume content of CO2 in parallel sample 2 is C(CO2)=0.39%, and the volume content of N2O is C(N2O)=0.04%; the test termination conditions are not met;

[0135] The test results of the two reaction bottles containing sample 2# are as follows:

[0136] The volume content of CO2 in parallel sample 3 is C(CO2)=0.51%, and the volume content of N2O is C(N2O)=0.05%.

[0137] The volume content of CO2 in parallel sample 4 is C(CO2)=0.47%, and the volume content of N2O is C(N2O)=0.05%; the test termination conditions are not met;

[0138] The fourth heating vibration test was carried out and tested, and the test results are as follows:

[0139] The test results of the two reaction bottles containing sample 1# are:

[0140] The volume content of CO2 in parallel sample 1 is C(CO2)=0.38%, and the volume content of N2O is C(N2O)=0.04%.

[0141] The volume content of CO2 in parallel sample 2 is C(CO2)=0.35%, and the volume content of N2O is C(N2O)=0.05%; the test termination conditions are not met;

[0142] The test results of the two reaction bottles containing sample 2# are as follows:

[0143] The volume content of CO2 in parallel sample 3 is C(CO2)=0.65%, and the volume content of N2O is C(N2O)=0.05%.

[0144] The volume content of CO2 in parallel sample 4 is C(CO2)=0.62%, and the volume content of N2O is C(N2O)=0.03%; the test termination conditions are not met;

[0145] The fifth heating vibration test was carried out and tested, and the test results are as follows:

[0146] The test results of the two reaction bottles containing sample 1# are:

[0147] The volume content of CO2 in parallel sample 1 is C(CO2)=0.39%, and the volume content of N2O is C(N2O)=0.06%.

[0148] The volume content of CO2 in parallel sample 2 is C(CO2)=0.35%, and the volume content of N2O is C(N2O)=0.05%; the test termination conditions are not met;

[0149] The test results of the two reaction bottles containing sample 2# are as follows:

[0150] The volume content of CO2 in parallel sample 3 is C(CO2)=0.51%, and the volume content of N2O is C(N2O)=0.09%.

[0151] The volume content of CO2 in parallel sample 4 is C(CO2)=0.58%, and the volume content of N2O is C(N2O)=0.07%; the test termination conditions are not met;

[0152] The sixth heating vibration test was conducted and tested, and the test results are as follows:

[0153] The test results of the two reaction bottles containing sample 1# are:

[0154] The volume content of CO2 in parallel sample 1 is C(CO2)=0.40%, and the volume content of N2O is C(N2O)=0.05%.

[0155] The volume content of CO2 in parallel sample 2 is C(CO2)=0.46%, and the volume content of N2O is C(N2O)=0.03%; the test termination conditions are not met;

[0156] The test results of the two reaction bottles containing sample 2# are as follows:

[0157] The volume content of CO2 in parallel sample 3 is C(CO2)=5.93%, and the volume content of N2O is C(N2O)=0.22%.

[0158] The volume content of CO2 of parallel sample 4 is C(CO2)=2.45%, and the volume content of N2O is C(N2O)=0.13%;

[0159] The CO2 volume content C(CO2) of parallel sample 3 is greater than 4%, which has met the test termination conditions. The heating vibration test is no longer performed, and the transportation safety of sample 2# is determined to be 6, that is, the transportation safety days of sample 2# are 6 days.

[0160] The 1# sample was subjected to the 7th heating vibration test and tested. In this test, two empty reaction bottles 1 were used to replace the reaction bottle 1 of the 2# sample and loaded into the thermostat. The test results are as follows:

[0161] The volume content of CO2 in parallel sample 1 is C(CO2)=0.55%, and the volume content of N2O is C(N2O)=0.07%.

[0162] The volume content of CO2 of parallel sample 2 is C(CO2)=0.46%, and the volume content of N2O is C(N2O)=0.05%; the test termination conditions are not met.

[0163] Since the number of heating vibration tests has reached seven, no heating vibration test will be carried out. It is determined that the transportation safety of sample 1# is greater than 7, and the number of safe transportation days of the inventory single pine potassium propellant is greater than 7 days.

[0164] From the test results of this embodiment, it can be seen that:

[0165] The transportation safety of sample 1# with the stabilizer content reduced to 0.4% is higher than that of sample 2# with the stabilizer content reduced to 0.2%, so sample 1# can be transported to a farther place for processing.

[0166] Application Example 2

[0167] In this example, water-containing NC was used as the sample to be tested, and the method disclosed in Example 2 was used for the test. There is no stabilizer in the water-containing NC, and the nitrogen oxides produced by its thermal decomposition will accelerate the decomposition of NC. NC has poor thermal conductivity. When the water in the NC sample is completely volatilized by heat, the dry NC will generate static electricity accumulation due to vibration and friction. Due to the poor thermal conductivity, the local temperature will rise. The higher the temperature, the faster the NC decomposes. Therefore, from a safety perspective, the sample loading amount in the reaction bottle is 5g

[0168] Two sample specimens were prepared and named as Parallel Sample 1 and Parallel Sample 2. The weighing weight of Parallel Sample 1 was 4.9 g and the weighing weight of Parallel Sample 2 was 5.0 g.

[0169] Put the reaction bottle 1 with two sample specimens and the fixing rack 2 with four empty reaction bottles 1 into the thermostat 3, and heat the thermostat 3 to 71°C. After the temperature stabilizes, set the vibrator 4 to the random vibration mode, and start heating and vibration. After 8 hours, stop heating and vibration, remove the box cover 31, take out the fixing rack 2, cool to room temperature, and wait for detection;

[0170] First, the gas chromatograph 5 is used to extract the CO2 content of the gas in the empty reaction bottle 1 for detection; only one test is performed; then the two reaction bottles 1 are subjected to gas extraction detection, and the test results are as follows:

[0171] The volume content of CO2 in parallel sample 1 is C(CO2)=0.21%, and the volume content of N2O is C(N2O)=0.11%.

[0172] The volume content of CO2 in parallel sample 2 is C(CO2)=0.32%, and the volume content of N2O is C(N2O)=0.03%; the test termination conditions are not met;

[0173] The second heating vibration test was carried out and tested, and the test results are as follows:

[0174] The volume content of CO2 in parallel sample 1 is C(CO2)=0.16%, and the volume content of N2O is C(N2O)=0.01%.

[0175] The volume content of CO2 in parallel sample 2 is C(CO2)=0.28%, and the volume content of N2O is C(N2O)=0.02%; the test termination conditions are not met;

[0176] Continue to carry out the third heating vibration test and test, the test results are as follows:

[0177] The volume content of CO2 in parallel sample 1 is C(CO2)=0.41%, and the volume content of N2O is C(N2O)=0.01%.

[0178] The volume content of CO2 in parallel sample 2 is C(CO2)=0.44%, and the volume content of N2O is C(N2O)=0.02%; the test termination conditions are not met;

[0179] Continue to carry out the 4th heating vibration test and test, the test results are as follows:

[0180] The volume content of CO2 in parallel sample 1 is C(CO2)=0.25%, and the volume content of N2O is C(N2O)=0.02%.

[0181] The volume content of CO2 in parallel sample 2 is C(CO2)=0.39%, and the volume content of N2O is C(N2O)=0.04%; the test termination conditions are not met;

[0182] Continue to carry out the fifth heating vibration test and test, the test results are as follows:

[0183] The volume content of CO2 in parallel sample 1 is C(CO2)=0.27%, and the volume content of N2O is C(N2O)=0.02%.

[0184] The volume content of CO2 in parallel sample 2 is C(CO2)=0.31%, and the volume content of N2O is C(N2O)=0.05%; the test termination conditions are not met;

[0185] Continue to carry out the sixth heating vibration test and test, the test results are as follows:

[0186] The volume content of CO2 in parallel sample 1 is C(CO2)=0.31%, and the volume content of N2O is C(N2O)=0.04%.

[0187] The volume content of CO2 in parallel sample 2 is C(CO2)=0.51%, and the volume content of N2O is C(N2O)=0.09%; the test termination conditions are not met;

[0188] Continue to carry out the 7th heating vibration test and test, the test results are as follows:

[0189] The volume content of CO2 in parallel sample 1 is C(CO2)=0.51%, and the volume content of N2O is C(N2O)=0.09%.

[0190] The volume content of CO2 in parallel sample 2 is C(CO2)=1.21%, and the volume content of N2O is C(N22O)=0.42%>0.35%, which meets the test termination conditions. The heating vibration test is no longer carried out, and the safe transportability of the water-containing NC sample is determined to be 7.

[0191] In this application example, after the heating vibration test was carried out for the 7th time, the C(N2O) of parallel sample 2 was 0.42%>0.35%, which indicates that its stability has deteriorated.

[0192] The chemical decomposition law of water-containing NC is different from that of the 2# single pine potassium propellant sample in Application Example 2. In Application Example 2, the C(CO2) of the 6th parallel sample 1 of the 2# single pine potassium propellant sample was 5.93%, and C(N2O) was 0.22%. According to C(CO2)=5.93%>4%, it was judged that its stability deteriorated. However, there is no stabilizer in NC, and the N2O produced by its thermal decomposition is not absorbed by the stabilizer, so the N2O in the NC sample reaches the critical value faster.

[0193] The numerical difference between parallel samples of NC (nitrocellulose) containing water is greater than that of single potassium nitrate propellant because the water content in NC containing water is uneven, and the uniformity of single potassium nitrate propellant is significantly better than that of NC containing water. For the sake of insurance, no matter whether the uniformity of the sample is good or bad, when the method of the present invention is used for judgment, the test results are not averaged, but as long as the stability of one parallel sample deteriorates, the test is stopped and the results are reported.

[0194] The preferred embodiments of the present invention are described in detail above in conjunction with the accompanying drawings. However, the present invention is not limited to the specific details in the above embodiments. Within the technical concept of the present invention, a variety of simple modifications can be made to the technical solution of the present invention, and these simple modifications all belong to the protection scope of the present invention.

[0195] In addition, various embodiments of the present invention may be arbitrarily combined, and as long as they do not violate the concept of the present invention, they should also be regarded as the contents disclosed by the present invention.

Claims

1. A laboratory small-dose detection method for the transportation safety of inventory single-pine potassium propellant, characterized in that: The following steps are involved: Step 1, prepare an empty reaction bottle, a first reaction bottle filled with monosporin potassium propellant, and a second reaction bottle, and obtain the CO2 content of the gas in the empty reaction bottle; Step 2, performing n heating vibration tests on the first reaction bottle and the second reaction bottle, wherein n is a positive integer ≤ 7; obtaining the CO2 volume content and the N2O volume content of the gas in the first reaction bottle and the gas in the second reaction bottle after each heating vibration test, and then obtaining the CO2 volume content and the N2O volume content of the decomposition gas of the single potassium propellant in the first reaction bottle and the decomposition gas of the single potassium propellant in the second reaction bottle after each heating vibration test; During the n heating vibration tests, if one of the following test termination conditions is met, the test is terminated; The test termination conditions include: The volume content of CO2 in the decomposition gas of the monosodium pyrophosphate propellant in the first reaction bottle is ≥4.00%; The volume content of N2O in the decomposition gas of the mono-pine potassium propellant in the first reaction bottle is ≥ 0.35%; The volume content of CO2 in the decomposition gas of the monosodium potassium propellant in the second reaction bottle is ≥4.00%; The volume content of N2O in the decomposition gas of the monosodium potassium propellant in the second reaction bottle is ≥ 0.35%; When the test is terminated when one of the test termination conditions is met, the transportation safety of the single-potassium propellant in stock is determined to be n; When the number of repeated tests reaches n=7 and any test termination condition is not met, it is determined that the transportation safety of the single-potassium propellant in stock is greater than 7; The heating temperature of the heating vibration test is 70°C to 72°C, the vibration time is 7 hours to 9 hours, the vibration frequency is 9Hz to 11Hz, and the amplitude is 15mm to 25mm; The CO2 volume content of the decomposition gas of the single-potassium propellant in step 2 = the CO2 volume content in the reaction bottle measured after the heating and vibration test - the CO2 volume content of the gas in the empty reaction bottle; the N2O volume content of the decomposition gas of the single-potassium propellant = the N2O volume content in the reaction bottle measured after the heating and vibration test.

2. The laboratory small-dose detection method for the transportation safety of inventory single-pine potassium propellant as claimed in claim 1 is characterized in that: The single pine potassium propellant comprises a single-hole tubular charge with an outer diameter of 4.5 mm to 5.5 mm, a combustion layer thickness of 0.9 mm to 1.1 mm, and a length of ≥100 mm.

3. The laboratory small-dose detection method for transportation safety of inventory single pine potassium propellant as claimed in claim 1 is characterized in that: The filling mass of the mono-potassium propellant in the first reaction bottle and the second reaction bottle is 9.5g to 10.5g.

4. The laboratory small-dose detection method for transportation safety of inventory single-potassium propellant as claimed in claim 1 is characterized in that: The method is implemented by a transport safety test device for single-potassium propellant in stock, the test device comprising a reaction bottle (1) arranged on a fixed frame (2), and also comprising a thermostat (3) and a vibrator (4), wherein the thermostat (3) is arranged above the vibrator (4) and is used to heat the reaction bottle (1) filled with single-potassium propellant; The test device also includes a gas chromatograph (5).

5. The laboratory small-dose detection method for transportation safety of inventory single pine potassium propellant as claimed in claim 4 is characterized in that: The reaction bottle (1) comprises a bottle body (11) with a cavity therein and a bottle cap (12) matching the bottle body (11); a sealing gasket is arranged inside the bottle cap (12); a buffer sleeve (13) is arranged outside the bottle body (11); and a through pore is opened at the center of the upper surface of the bottle cap (12).

6. The laboratory small-dose detection method for transportation safety of inventory single pine potassium propellant as claimed in claim 5 is characterized in that: The bottle body (11) has a wall thickness of 1 mm, an outer diameter of 20 mm, and an outer height of 120 mm; the bottle cap (12) has an outer height of 15 mm and a wall thickness of 1 mm; the buffer sleeve (13) has a wall thickness of 1.5 mm, an inner diameter of 20 mm, and a height of 80 mm; and the sealing pad has a thickness of 1.5 mm.

7. The laboratory small-dose detection method for transportation safety of inventory single potassium propellant as claimed in claim 5 is characterized in that: The thermostat (3) comprises a box cover (31), a thermostat box (32) and a heating base (33); the thermostat box (32) is arranged on the heating base, and the box cover (31) and the thermostat box (32) can be sealed and connected.

8. The laboratory small-dose detection method for transportation safety of inventory single potassium propellant as claimed in claim 5 is characterized in that: The fixing frame (2) comprises a lofting circular plate (21), a connecting rod (22) and a circular mesh plate (23); the lofting circular plate (21) is arranged horizontally and connected to a circular mesh plate (23) arranged horizontally below the lofting circular plate (21) through the connecting rod (22); a plurality of lofting holes are arranged equidistantly along the circumference of the lofting circular plate; the upper end of the connecting rod (22) passes through the lofting circular plate (21) to connect to the handle, and the lower end of the connecting rod (22) passes through the circular mesh plate (23) to connect to the support leg.

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