CN112147174A - Sample pool for testing vacuum stability of explosives and powders - Google Patents
Sample pool for testing vacuum stability of explosives and powders Download PDFInfo
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- CN112147174A CN112147174A CN202010856874.2A CN202010856874A CN112147174A CN 112147174 A CN112147174 A CN 112147174A CN 202010856874 A CN202010856874 A CN 202010856874A CN 112147174 A CN112147174 A CN 112147174A
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- Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
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Abstract
The invention discloses a sample cell for a gunpowder and explosive vacuum stability test, which comprises a sample cell body and a vent hole connecting piece, wherein the vent hole connecting piece is connected to the bottom of the sample cell body; the sample cell body is provided with a boss and an annular groove, and the annular groove is arranged around the boss in the circumferential direction; the air vent connecting piece comprises a connecting piece body, a section of blind hole is arranged at the center of the connecting piece body, a plurality of air vent grooves distributed in the same direction as the blind hole are formed in the outer wall of the connecting piece body, and the blind hole is communicated with the air vent grooves through air vent gaps. The sample in the sample cell can be uniformly and thinly paved at the bottom of the cell, so that the heat released by the decomposition of the sample can be directly and quickly released into the atmosphere without heat conduction, the problem that the real temperature measurement of the decomposed gas is influenced due to the non-uniform distribution of the gas temperature is better solved, and the problem that the micro-nano powder sample is easy to be pumped away when being vacuumized is also solved.
Description
Technical Field
The invention belongs to the technical field of explosive vacuum stability tests, and particularly relates to a sample pool for explosive vacuum stability tests.
Background
The vacuum stability and compatibility of the explosives and powders are the safety performance which must be obtained when the raw materials are subjected to type selection design in the design stage of the explosive and powder formula. At present, the original vacuum stability test only can obtain the gas release amount at the first time point and the last time point, and can not obtain the decomposition process and the decomposition kinetic parameters, so that the trend of the vacuum stability test adopting dynamic vacuum stability to replace the original explosives and powders is existed at home and abroad. A device and a test method for measuring the decomposition and deflation pressure of explosives and powders in real time by a pressure sensor have been established abroad in the last century, and research and development of a dynamic vacuum stability test device and method are also carried out by related units in China at the beginning of the century. The representative of China is Beijing university of science and engineering, and a typical dynamic vacuum stability testing device is shown in figure 1 (Zhang Tonglei, Huichun, Yangli, and the like, research on dynamic vacuum stability test methods (I), energetic materials, 2009,17(5): 549-. A business instrument specially used for the stability of explosives and powders abroad is a strap-down STABIL VI stabilizer.
The existing vacuum stabilizer adopts two heating modes of resistance wire type solid heating furnace hole heating and oil groove heating, when the solid heating furnace hole heating is adopted, because a gap exists between a reactor and the furnace hole, the reactor is equivalently placed in an air bath, namely the resistance wire type solid heating furnace hole heating is actually the air bath heating. During the test, the bottom of the reactor is directly contacted with the bottom of the heating hole, and for a non-self-heat-release sample, the temperature of the sample is approximately equal to the furnace body control temperature (a furnace body temperature control sensor is positioned in a furnace body heat conducting block). For oil tank heating, because the inside of the oil tank can be stirred to increase the uniformity and the heating medium oil is in good contact with the reactor, the sample temperature and the oil temperature can be regarded as approximately equal to each other for a non-self-heat-release sample. For the self-heat-release sample, the heat released from the surface of the sample can be considered to be timely taken away by oil through the reactor when the oil groove is adopted for heating, so that the balance is achieved, and the surface temperature can be kept constant. However, for heating the electric resistance wire type solid heating furnace hole, air is outside the wall of the reactor and does not flow, so that the temperature of the surface of the sample cannot be kept constant.
In addition, the reactors adopted in the existing stability tests are all slender glass or stainless steel reactors with the diameter of 10-20 mm, the sample height is generally 1-4 cm for the sample amount specified in the standard, and due to the difference of the thermal conductivity coefficient of explosives and powders, the heat inside the sample inside the reactor cannot be dissipated through heat conduction during the test of the self-heat-release sample, so that the temperature of the inside sample is increased and deviates from the temperature specified in the standard. The vacuum stability is definitely specified in the standard to measure the decomposition and gas release amount of the sample at constant temperature, so the test mode can solve the problem that the test result is inaccurate due to the heat accumulation temperature rise in the sample when the stability or compatibility of the self-heat-release explosive, particularly the self-accelerated decomposition explosive or functional material with large heat release amount is carried out.
Disclosure of Invention
Aiming at the defects in the prior art, the invention aims to provide a sample cell for testing the vacuum stability of explosives and powders, which solves the problem that the internal temperature of a sample is far higher than the control experiment temperature due to the self-heat release or poor heat conductivity of the sample, so that the measurement result is inaccurate.
In order to solve the technical problems, the invention adopts the following technical scheme:
a sample cell for explosive vacuum stability tests comprises a sample cell body and a vent hole connecting piece, wherein the vent hole connecting piece is connected to the bottom of the sample cell body; the sample cell body is provided with a boss and an annular groove, and the annular groove is circumferentially arranged around the boss;
the air vent connecting piece comprises a connecting piece body, a section of blind hole is arranged at the center of the connecting piece body, a plurality of ventilation grooves distributed in the same direction as the blind hole are formed in the outer wall of the connecting piece body, and the blind hole is communicated with the ventilation grooves through ventilation gaps.
Specifically, the sample cell body comprises a bottom plate and an outer edge connected to the periphery of the bottom plate, and the annular groove is formed between the outer edge and the boss.
Preferably, the top of the outer edge is higher than the top of the boss.
Specifically, the bottom of the boss is provided with a groove matched with the external shape of the vent hole connecting piece; the depth of the groove is less than the whole height of the vent hole connecting piece.
Preferably, the vent hole connecting piece is cylindrical.
Specifically, a transverse air duct is arranged on the first boss and communicated with the second connecting port; a gap is arranged between the outer wall of one end, provided with the transverse air duct, of the first boss and the inner wall of the blind hole.
Furthermore, the bottom of the annular groove is provided with a filter plate structure, and the aperture of the filter plate is less than or equal to 2 μm.
Preferably, the distance between the outer edge of the outer part of the annular groove and the inner wall of the shell of the test device is less than 2 mm.
Compared with the prior art, the invention has the beneficial effects that:
(1) the sample cell is provided with the annular groove for placing the sample, the sectional area of the annular groove is far larger than the filling sectional area of the original sample, so that the sample can be uniformly and thinly paved at the bottom of the groove, and the heat released by the decomposition of the sample is directly and quickly released into the atmosphere without heat conduction; the sample pool is suspended in the reactor, so that the sample is physically separated from the bottom of the reactor, the heat conduction between the sample and the reactor is avoided, the temperature of the sample is completely heated by gas and radiation, the sample is heated to be basically symmetrical up and down, and the constant temperature of the sample is ensured. The sample cell of the invention can reduce the difference between the temperature of the sample and the temperature of the decomposed gas, and can accurately obtain the temperature of the decomposed gas, rather than generally adopting the control temperature as the temperature of the decomposed gas. The problem that the real temperature measurement of the decomposed gas is influenced due to the fact that the gas temperature is not uniformly distributed is solved.
(2) The sample cell can also be used for micro-nano powder, and the direction of the internal airflow is changed for many times during vacuumizing, so that the sample is prevented from being directly pumped away by the exhaust airflow; and the filter plate at the bottom of the annular groove becomes a channel for pumping air downwards, so that the net acting force exerted on the sample in the annular groove is downward, and the sample is prevented from flying and being pumped away.
Additional features and advantages of the invention will be set forth in the detailed description which follows.
Drawings
FIG. 1 is a schematic view of a conventional dynamic vacuum stability test apparatus.
FIG. 2 is a schematic view of the entire structure of a sample cell described in example 1 of the present invention.
FIG. 3 is a schematic view of the structure of a sample cell body according to example 1 of the present invention.
FIG. 4 is a schematic diagram of a sample cell body suitable for micro-nano powder according to example 2 of the present invention.
Fig. 5 is a schematic structural view of a vent connector according to embodiment 1 of the present invention.
Fig. 6 is a schematic view of the sectional structure a of fig. 5.
FIG. 7 is a schematic view of the structure of a reactor body described in example 3 of the present invention.
FIG. 8 is a schematic view of the overall configuration of a test apparatus described in embodiment 3 of the present invention.
FIG. 9 is a schematic view of the structure of a reactor described in example 4 of the present invention.
The reference numerals in the figures denote:
a-a glass constant volume test tube, b-a miniature pressure sensor, c-a miniature temperature sensor, d-a program temperature control heating furnace, e-a remote transmission data cable, f-a PID regulator, g-a data acquisition unit and h-a control computer;
1-a sample pool, 2-a shell, 3-an inner cavity, 4-a pressure sensor, 5-a temperature sensor, 6-a vacuum-pumping joint, 7-a sealing gasket, 8-a first boss and 9-a temperature-control temperature sensor;
101-sample cell body, 102-vent hole connector, 103-boss, 104-annular groove, 105-bottom plate, 106-outer edge, 107-connector body, 108-blind hole, 109-vent groove, 110-vent gap, 111-groove;
201-an inner container layer, 202-a heating layer, 203-a heat conduction layer, 204-an electric heating sheet, 205-an insulation sheet, 206-a first lead copper column, 207-an insulation layer, 208-a second lead copper column, 209-a first connection port, 210-a second connection port, 211-a third connection port, 212-an upper shell, 213-a lower shell, 214-a bolt hole, 215-a blind hole and 216-a nut;
601-first end, 602-second end, 603-L-shaped vent, 604-vent slit.
801-transverse airway, 802-space.
The details of the present invention are explained in further detail below with reference to the drawings and the detailed description.
Detailed Description
The following embodiments of the present invention are provided, and it should be noted that the present invention is not limited to the following embodiments, and all equivalent changes based on the technical solutions of the present invention are within the protection scope of the present invention.
In the present invention, unless otherwise specified, use of the terms of orientation such as "upper, lower, bottom, top" and "lower" generally refer to the definition in the drawing figures of the accompanying drawings, and "inner and outer" refer to the inner and outer of the outline of the corresponding part.
Example 1
The embodiment discloses a sample cell for a vacuum stability test of explosives and powders, as shown in fig. 1, the sample cell 1 comprises a sample cell body 101 and a vent hole connector 102, wherein the vent hole connector 102 is connected to the bottom of the sample cell body 101. Wherein, the vent hole connector 102 is used for connecting with the channel of the vacuum-pumping connector 6 on the reactor of fig. 7, and when in specific installation, the vent hole connector 102 is installed on the first boss 8 of the test device.
The sample cell body 101 is provided with a boss 103 and an annular groove 104, and the annular groove 104 is circumferentially arranged around the boss 103. Specifically, as shown in fig. 3, the sample cell body 101 of the present embodiment includes a bottom plate 105 and an outer rim 106 connected around the bottom plate 105, and the annular groove 104 is formed between the outer rim 106 and the boss 103. The annular sectional area of the groove bottom of the annular groove 104 is far larger than the original sample filling sectional area, so that the sample can be uniformly and thinly paved on the groove bottom, and the heat released by the sample decomposition is directly and rapidly released into the atmosphere without heat conduction. Meanwhile, the annular groove 104 structure is convenient for sample filling, and sample tiling is realized by shaking the sample pool.
Preferably, the top of the outer rim 106 is higher than the top of the boss 103. Because of the large suction force during the vacuum pumping, the design that the height of the outer edge 106 is slightly higher than that of the central boss 103 enables the negative pressure at each position above the sample in the annular groove 104 to be centrosymmetric during the air pumping, and avoids the situation that the sample around the central boss 103 is excessively sucked upwards, so that the sample flies and is pumped away.
The bottom of the boss 103 is provided with a groove 111 matching with the external shape of the vent hole connector 102, and the depth of the groove 111 is smaller than the overall height of the vent hole connector 102, so that the annular groove 104 can be suspended. The sample is physically separated from the bottom of the reactor, so that heat conduction between the sample and the reactor is avoided, the temperature of the sample is completely heated by gas and radiation, the sample is basically heated up and down symmetrically, and the constant temperature of the sample is ensured.
Specifically, the sample cell 1 of the present embodiment is made of quartz glass. Avoiding the additional influence on the measuring result caused by the incompatibility of the sample cell 1 and the sample.
As shown in fig. 4, the vent connector 102 of the present embodiment includes a connector body 107, a section of blind hole 108 is disposed in the center of the connector body 107, a plurality of vent grooves 109 distributed in the same direction as the blind hole 108 are disposed on the outer wall of the connector body 107, and the blind hole 108 is communicated with the vent grooves 109 through vent gaps 110. The plurality of vent grooves 109 are evenly distributed in the circumferential direction as shown in fig. 5.
The vent hole connecting piece 102 of the embodiment is cylindrical, and the vent hole connecting piece 102 and the bottom of the groove 111 are connected into a whole by adopting quartz glass fusion welding, so that the assembly is convenient. The effect of the sample cell 1 of this example on the fit within the reactor is shown in FIG. 7.
Example 2
The embodiment discloses a little nano powder explosive vacuum stability test uses sample cell, mainly used survey little nano powder sample, and the difference of the sample cell structure of this embodiment and embodiment 1 lies in: the bottom 105 of the annular groove 104 is provided as a filter plate structure, as shown in fig. 4.
The filter plate is provided with the pore passage, so that the filter plate becomes a channel for pumping air downwards; in addition, a circular symmetrical ventilation channel is formed between the outer edge 106 and the inner wall of the reactor shell 2, and becomes a second air extraction channel. By adjusting the proportion of the cross section area of the filter plate and the cross section area of the circular symmetric ventilation channel, the downward suction force of the sample through the filter plate during air suction is the main stress direction, the upward suction force of the negative pressure of the air suction formed by the circular symmetric ventilation channel to the sample is the secondary stress direction, the net acting force borne by the sample is downward, the sample is prevented from being lifted and sucked away, and meanwhile, the upward force and the downward suction force borne by the sample are not greatly different, and the sample is prevented from entering the pore passage of the filter plate.
The filter plate of the embodiment is a quartz sand core filter plate, the aperture of the filter plate is less than or equal to 2 μm, and the distance between the outer edge 106 and the inner wall of the reactor shell 2 is less than 2 mm. In this embodiment, the aperture of the vent groove 109 is smaller than 2mm, and the vent gap at the upper end is smaller than 1 mm.
Example 3
This embodiment discloses a vacuum stability test device for explosives and powders, as shown in fig. 7 and 8, the device includes a reactor body and a sample cell 1 for placing a sample, wherein the sample cell 1 is the sample cell described in embodiment 1.
Wherein the reactor body comprises a shell 2 and an inner cavity 3. The housing 2 is assembled by an upper housing 212 and a lower housing 213, so that the whole apparatus is easily disassembled. The sample cell is placed on a boss 8 within the reactor.
When the sample cell 1 of the present embodiment is assembled, the first boss 8 is provided with the transverse air passage 801, and the transverse air passage 801 is communicated with the second connection port 210; a gap 802 is arranged between the outer wall of one end of the first boss 8, which is provided with the transverse air duct 801, and the inner wall of the blind hole 108. Specifically, the first boss 8 is cylindrical, and the gap 802 forms an annular air passage.
The housing structure of the present embodiment is preferably the housing structure described in embodiment 4 below, but other housing structures capable of achieving the effects of the present invention are also within the scope of the present invention.
Example 4
This example discloses a gunpowder and explosive vacuum stability reactor, as shown in fig. 9, the reactor comprises a shell 2 and an inner cavity 3. The housing 2 is provided with a first connection port 209, a second connection port 210, and a third connection port 211, and the first connection port 209, the second connection port 210, and the third connection port 211 are all communicated with the inner cavity 3. The first connection port 209 is used for mounting the pressure sensor 4, the second connection port is used for connecting the vacuum-pumping connector 6, and the third connection port is used for mounting the temperature sensor 5 for measuring the temperature of the decomposed gas.
The temperature sensor 5 of this embodiment adopts armor PT100, through welding mode sealing connection in third connector 211, and temperature sensor 5 stretches into inner chamber 3, the inside decomposition gas temperature of direct measurement. As a preferable aspect of the present embodiment, the third connection port 211 is provided at a side of the housing 2 near the annular groove 103 of the sample cell 1.
The bottom of inner chamber 3 is provided with first boss 8, and the unsettled support of sample cell 1 is in first boss 8 on, make sample and 2 bottoms physics of reactor casing separate, avoid the heat-conduction between sample and the reactor casing 2, make sample temperature completely by gaseous and radiant heating, impel the sample to be heated upper and lower symmetry basically, ensure that sample temperature is invariable.
As a preferable scheme of this embodiment, the first connection port 209 is formed by a cylindrical passage, and specifically, the material of the cylindrical passage is stainless steel. The first connection port 209 is a step-shaped structure with a larger bottom and a smaller bottom, and is specifically formed by through holes with different diameters at two ends. The smaller diameter through holes are located on the inner chamber 3 side of the reactor. When the pressure sensor 4 is connected to the first connection port 209, the sealing gasket 7 is disposed at the step end face where the through hole with the larger diameter contacts the pressure sensor 4, so as to ensure the sealing performance of the inner cavity 3 during the test.
As a preferable scheme of this embodiment, the second connection port 210 is also formed by a cylindrical channel, and the cylindrical channel extends towards the inner cavity of the reactor body to form the first boss 8, specifically, the first boss 8 and the cylindrical channel are also made of stainless steel. The second connection port 210 is stepped in a shape of a small upper part and a large lower part, and the end of the vacuum connector 6 is pressed against the step. And a sealing gasket 7 is arranged at the joint of the end part of the second end 602 and the step, so that the sealing performance of the inner cavity 3 during the test is ensured.
Specifically, the vacuum joint 6 in this embodiment is in the structural form shown in fig. 1, specifically, as shown in fig. 1, the vacuum joint 6 includes a first end 601 and a second end 602, and the outer diameter of the first end 601 is larger than that of the second end 602. An L-shaped vent 603 is provided inside the vacuum connector 6, one end of the L-shaped vent 603 extends along the axial direction of the vacuum connector 6, and the other end extends to the outer wall of the second end 602. The first end 601 outer diameter matches the larger inner diameter of the second connection port 210 such that a vent gap 604 is formed between the outer wall of the second end 602 and the inner wall of the second connection port 210. When the vacuumizing connector 6 is loosened, the sealing gasket 7 is not in close contact with the step of the second connecting port 210, so that the gas in the inner cavity 3 flows into the vacuumizing connector 6 along the ventilation gap 604, and the decomposed gas can be pumped out; when the inner cavity 3 meets the requirement of vacuum degree, the vacuumizing connector 6 is screwed down to enable the sealing gasket 7 to be in close contact with the end face of the small hole, and sealing is guaranteed.
The vacuum connector 6 of the present embodiment may be any other connector available on the market as long as communication with the inner cavity is achieved, but such a configuration of the present invention is preferable.
As shown in fig. 1, the housing 2 of the present embodiment includes an inner container layer 201, a heating layer 202, and a heat conduction layer 203, wherein the heat conduction layer 203 is completely wrapped outside the inner container layer 201; the heating layer 202 is disposed between the inner container layer 201 and the heat conduction layer 203, and heats the whole device.
As a preferable scheme of the present embodiment, the heating layer 202 is an electric heating layer, and includes an electric heating sheet 204 and an insulating sheet 205, specifically, the electric heating sheet 204 is a nickel-gold complex sheet, and the insulating sheet 205 is a mica insulating sheet. The electric heating sheet 204 is sandwiched between insulating sheets 205. A first lead copper pillar 206 is arranged on the electric heating plate 204, a first hole (not marked in the figure) for the first lead copper pillar 206 to pass through is arranged on the heat conduction layer 203, and a wiring plug is led out of the electric heating plate 204 through the first lead copper pillar 206. Further, an insulating layer 207 is disposed between the first lead copper pillar 206 and the wall of the first hole, and the insulating layer 207 is specifically formed by insulating paste filled between the first lead copper pillar 206 and the wall of the first hole.
The inner container layer 201 of this embodiment is made of stainless steel, and the inner container layer 201 surrounds the inner cavity 3 forming the whole device. Preferably, the liner layer 201 of the present embodiment is designed to be flat, and the longitudinal temperature gradient inside the reactor is further reduced by structural optimization.
The heat-conducting layer 203 of this embodiment is the copper heat-conducting layer, and the whole copper heat-conducting layer contact is wrapped up in the outside of inner bag layer 201 and zone of heating 202 entirely, reduces the influence of external environment to stainless steel inner bag 4 through the good copper heat-conducting layer of heat conductivity.
Through the shell structure of the embodiment, the radial and axial temperature field uniformity in the reactor is improved.
As a preferable scheme of this embodiment, a temperature control temperature sensor 9 is disposed between the heating layer 202 and the inner container layer 201, and the temperature control temperature sensor 9 is used for controlling the heating temperature. The chip of the temperature control temperature sensor 9 is directly contacted with the outer surface of the inner container layer 201 tightly, and the uniformity of the temperature field in the reactor can be improved by the direct contact heating mode. In addition, a second lead copper pillar 208 is connected to the temperature-controlled temperature sensor 9, a second hole (not shown) through which the second lead copper pillar 208 passes is formed in the heating layer 202 and the heat-conducting layer 203, and the temperature-controlled temperature sensor 9 is led out of the connection line through the second lead copper pillar 208. Also, an insulating layer 207 is provided between the second lead copper pillar 208 and the hole wall of the first hole, and the insulating layer 207 is specifically formed of an insulating paste filled between the second lead copper pillar 208 and the hole wall of the second hole.
As a preferable scheme of this embodiment, the inner container layer 201 and the heat conduction layer 202 are fixed by nuts 216, which facilitates disassembly and assembly. Of course, other types of connections, such as welding, are also within the scope of the invention, but the method according to the invention is preferred.
In a preferred embodiment of this embodiment, the casing 2 of the reactor is generally cylindrical, and the plan view thereof is shown in FIG. 4. The first connection port 209 and the second connection port 210 are respectively arranged at the top center and the bottom center of the housing 2; the heating layers 202 are also disposed at the bottom and the top of the housing 2, and the heating layers 202 are disposed around the first connection port 209 and the second connection port 210. And first lead copper pillars 206 are provided at the bottom and top of the case 2, respectively.
As a preferable scheme of the embodiment, the housing 2 basically adopts a vertically symmetrical structure, as shown in fig. 8, specifically, the housing 2 is assembled by an upper housing 212 and a lower housing 213 through a nut 216, so that the whole device is convenient to disassemble and assemble. During the test, the nut 216 is fixed to the upper housing 212 and the lower housing 213 by using a torque wrench. After the test is completed, only the nut 216 needs to be disassembled to separate the upper shell 212 from the lower shell 213, that is, when the test is completed, the inner container layer 201, the heating layer 202 and the heat conduction layer 203 of the upper shell 212 and the lower shell 213 are integrated.
Specifically, the upper shell 212 is provided with a bolt hole 214 penetrating downwards from the top, the top of the upper shell 213 is correspondingly provided with a blind hole 215, when the upper shell 212 and the lower shell 213 are butted to form the complete shell 2, the blind hole 215 corresponds to the bolt hole 214, and the upper shell 212 is connected with the lower shell 213 through a nut 216, specifically, as shown in fig. 4, the inner container layer 201 and the fixing nut of the heat conducting layer 203, and the fixing nuts of the upper and lower shells are arranged at intervals along the circumference of the outer ring. In addition, the heat conduction layer 203 in the upper shell 212 protrudes a section relative to the upper liner layer 201, and the corresponding copper heat conduction layer 203 in the underground shell 213 is retracted an equal section relative to the liner layer 201, so as to avoid the overlapping of the butt seam of the liner layer 201 and the butt seam of the heat conduction layer 203.
And a sealing gasket 7 is arranged at the butt joint of the upper shell 212 and the lower shell 213, so that the sealing performance of the device is ensured.
When the reactor of this example was used, the experimental procedure was:
(1) loosening the nut 216 of fig. 1 with a screwdriver to separate the upper and lower reactor shells 212 and 213;
(2) weighing a certain sample and placing the sample in an annular groove 103 of the sample cell 1;
(3) screwing down the nut 216 by a screwdriver, and assembling the upper part and the lower part of the reactor;
(4) loosening the vacuumizing connector 6 by using a screwdriver to ensure that the sealing gasket 7 is not in close contact with the end face of the second connector 210, and ensuring that the decomposed gas can be pumped out;
(5) connecting an air pumping system for pumping air, and when the requirement of vacuum degree is met, screwing down the vacuum pumping connector 6 to enable the sealing gasket 7 to be in close contact with the end face of the second connector 210, so as to ensure sealing;
(6) placing the reactor into a heating hole for testing;
(7) after the test is finished, the vacuumizing connector 6 is unscrewed by a screwdriver, so that the sealing gasket 7 is not in close contact with the end face of the second connector 210, and the pressure is released;
(8) the screw driver is adopted to loosen the nut 216, the upper part and the lower part of the reactor are separated, the sample cell 1 is taken out, and the sample residues are cleaned.
In the above description, unless otherwise explicitly stated or limited, the terms "disposed" and "connected" are to be understood broadly, and may be, for example, fixedly connected or detachably connected or integrated; either a direct connection or an indirect connection, and the like. The specific meaning of the above terms in the present technical solution can be understood by those of ordinary skill in the art according to specific situations.
The respective specific technical features described in the above-described embodiments may be combined in any suitable manner without contradiction as long as they do not depart from the gist of the present invention, and should also be regarded as being disclosed in the present invention.
Claims (8)
1. The sample cell for the explosive vacuum stability test is characterized by comprising a sample cell body (101) and a vent hole connecting piece (102), wherein the vent hole connecting piece (102) is connected to the bottom of the sample cell body (101);
the sample cell body (101) is provided with a boss (103) and an annular groove (104), and the annular groove (104) is arranged around the boss (103) in the circumferential direction;
the vent hole connecting piece (102) comprises a connecting piece body (107), a section of blind hole (108) is arranged at the center of the connecting piece body (107), a plurality of vent grooves (109) distributed in the same direction as the blind hole (108) are formed in the outer wall of the connecting piece body (107), and the blind hole (108) is communicated with the vent grooves (109) through vent gaps (110).
2. The sample cell for the vacuum stability test of explosives and powders according to claim 1, characterized in that the sample cell body (101) comprises a bottom plate (105) and an outer edge (106) connected around the bottom plate (105), and the annular groove (104) is formed between the outer edge (106) and the boss (103).
3. The sample cell for the vacuum stability test of explosives and powders according to claim 2, characterized in that the top of the outer edge (106) is higher than the top of the boss (103).
4. The sample cell for the vacuum stability test of explosives and powders according to claim 1, characterized in that the bottom of the boss (103) is provided with a groove (111) matched with the external shape of the vent hole connector (102); the depth of the groove (111) is less than the whole height of the vent hole connecting piece (102).
5. The sample cell for the vacuum stability test of explosives and powders according to claim 1, wherein the vent hole connector (102) is cylindrical.
6. The sample cell for the vacuum stability test of explosives and powders according to claim 1, characterized in that the first boss (8) is provided with a transverse air duct (801), and the transverse air duct (801) is communicated with the second connecting port (210); a gap (802) is arranged between the outer wall of one end, provided with the transverse air duct (801), of the first boss (8) and the inner wall of the blind hole (108).
7. The sample cell for the vacuum stability test of explosives and powders according to any of claims 1 or 6, characterized in that the bottom of the annular groove (104) is provided with a filter plate structure, and the aperture of the filter plate is less than or equal to 2 μm.
8. The sample cell for the vacuum stability test of explosives and powders according to claim 7, characterized in that the distance between the outer edge (106) of the outer part of the annular groove (104) and the inner wall of the shell (2) of the test device is less than 2 mm.
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| CN202010856874.2A CN112147174B (en) | 2020-08-24 | 2020-08-24 | Sample cell for testing vacuum stability of explosives and powders |
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| CN202010856874.2A CN112147174B (en) | 2020-08-24 | 2020-08-24 | Sample cell for testing vacuum stability of explosives and powders |
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| CN112147174A true CN112147174A (en) | 2020-12-29 |
| CN112147174B CN112147174B (en) | 2023-08-11 |
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| CN114518439A (en) * | 2022-01-25 | 2022-05-20 | 广东华晟安全职业评价有限公司 | Sample pool for testing vacuum stability of explosives and powders and testing method |
| CN114518439B (en) * | 2022-01-25 | 2023-12-22 | 大连安泰化工有限公司 | Sample cell for testing vacuum stability of explosives and powders and test method |
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