A vacuum stability testing device and testing system

Abstract

The present disclosure provides a kind of vacuum stability test device and test system, it is related to test equipment technical field.The test system includes: test tube, data acquisition module, heating module and activity module;Test tube is connected with data acquisition module, test tube is used to accommodate sample to be tested, and data acquisition module is used to collect the sample data in test tube;Heating module is used to heat test tube;Activity module includes track piece, sliding table piece and driving piece;Sliding table piece is movably located in track piece, driving piece is connected with sliding table piece, and driving piece is used to drive sliding table piece to move along track piece;Sliding table piece includes loading part, and test tube is connected with loading part;The position of sliding table piece on track piece includes first position and second position;When sliding table piece is located in first position, test tube is located in heating module;When sliding table piece is located in second position, test tube is located outside heating module.The test device of the present disclosure does not need to manually take and place test tube, and safety is better.

Description

TECHNICAL FIELD

[0001] The present disclosure relates to the technical field of test equipment, in particular to a vacuum stability test device and a test system. BACKGROUND

[0002] The vacuum stability test is usually used to test the chemical stability of energetic materials (explosives, propellants, pyrotechnics, explosive waste, hazardous chemicals, etc.). During the test, the sample to be tested is placed in a test tube, the test tube is pumped to a certain vacuum degree, then heated to keep the test tube at a constant temperature (for example, 30-160℃), and the volume of gas released by the sample to be tested is measured in real time.

[0003] In the related art, the vacuum stability test requires an operator to manually put the test tube into a high-temperature heating module or take it out, which has an explosion risk during the operation process. SUMMARY

[0004] The present disclosure provides a vacuum stability test device and a test system, which can solve the problem of safety hazards caused by manual taking and placing in the vacuum stability test.

[0005] The technical solution is as follows:

[0006] In one aspect, a vacuum stability test device is provided, which includes a test tube, a data acquisition module, a heating module, and a movable module.

[0007] The test tube is connected with the data acquisition module, the test tube is used to contain a sample to be tested, and the data acquisition module is used to acquire sample data in the test tube.

[0008] The heating module is used to heat the test tube.

[0009] The movable module includes a track piece, a sliding table piece, and a driving piece.

[0010] The sliding table piece is movably located on the track piece, the driving piece is connected with the sliding table piece, and the driving piece is used to drive the sliding table piece to move along the track piece.

[0011] The sliding table piece includes a loading part, and the test tube is connected with the loading part.

[0012] The position of the sliding table piece on the track piece includes a first position and a second position.

[0013] When the sliding table piece is located at the first position, the test tube is located in the heating module, and when the sliding table piece is located at the second position, the test tube is located outside the heating module.

[0014] In some embodiments, the heating module comprises a housing; a surface of the housing has a heating groove extending to the inside of the housing;

[0015] One end of the track member is connected to the housing, and the other end extends away from the housing;

[0016] When the sliding table member is in the first position, the sliding table member is close to the surface of the housing, and the test tube is located in the heating groove;

[0017] When the sliding table member is in the second position, the sliding table member is away from the surface of the housing, and the test tube is located outside the heating groove.

[0018] In some embodiments, the track member is connected perpendicularly to the surface of the housing, and the sliding table member is parallel to the surface of the housing;

[0019] The number of loading parts is at least two, and at least two loading parts are spaced apart on the sliding table member; the number of heating grooves is at least two, and at least two heating grooves are spaced apart on the surface of the housing, and the position of each heating groove corresponds to one loading part.

[0020] In some embodiments, the sliding table member is a circular ring plate member, and the track member passes through the sliding table member;

[0021] At least two loading parts are circumferentially spaced apart on the sliding table member, and at least two heating grooves are circumferentially spaced apart on the surface of the housing around the track member.

[0022] In some embodiments, the vacuum stability test device comprises a shielding box located at the end of the track member away from the housing;

[0023] The driving member is located in the shielding box and connected to the sliding table member through a transmission mechanism.

[0024] In some embodiments, the vacuum stability test device further comprises a wire harness receiver located at the end of the track member away from the housing, and the wire harness receiver is used to accommodate the wire harness of the data acquisition module.

[0025] In some embodiments, the test tube comprises a tube body assembly for accommodating a sample to be tested;

[0026] The connector comprises a first connecting part, a second connecting part and a third connecting part; the first connecting part is sealingly connected to the opening of the tube body assembly and connected to the loading part, the second connecting part is connected to the data acquisition module, and the third connecting part is connected to the pressure regulating valve.

[0027] In some embodiments, the pipe body assembly comprises a stainless steel outer pipe, a quartz inner pipe and a sealing ring;

[0028] The stainless steel outer pipe comprises a pipe body part and a flange part; the quartz inner pipe is located in the pipe body part; the flange part is located at the opening of the pipe body part, and the end face of the flange part has a ring groove accommodating the sealing ring;

[0029] The flange part is connected with the first connecting part, and the sealing ring seals the gap between the flange part and the first connecting part.

[0030] In some embodiments, the second connecting part comprises a first connecting port and a second connecting port, and the data acquisition module comprises a pressure sensor and a temperature sensor;

[0031] The pressure sensor is connected with the first connecting port and communicates with the pipe body assembly for acquiring pressure parameters; the temperature sensor is connected with the second connecting port and extends into the pipe body assembly to contact the sample to be tested for acquiring temperature parameters.

[0032] In another aspect, a vacuum stability test system is provided, comprising the vacuum stability test device described in the present disclosure and a control module;

[0033] The control module is electrically connected with the data acquisition module, the heating module and the driving member respectively, for controlling the working states of the data acquisition module, the heating module and the driving member respectively;

[0034] The control module comprises a pre-warning unit capable of sending a pre-warning signal when the sample data exceeds a target level.

[0035] The technical solution provided by the present disclosure has at least the following beneficial effects:

[0036] The vacuum stability test device of the present disclosure comprises a test pipe, a data acquisition module, a heating module and a moving module, wherein the moving module comprises a track member, a sliding table member and a driving member, the sliding table member loads the test pipe, and the sliding table member can move along the track member under the driving of the driving member; when the sliding table member is located at a first position, the test pipe is put into the heating module; when the sliding table member is located at a second position, the test pipe is taken out of the heating module; the test pipe is not manually operated, the moving precision is high, the test pipe can be effectively prevented from colliding and shaking, and the operator remotely operates the test pipe to take and place, so that the test safety is better. BRIEF DESCRIPTION OF DRAWINGS

[0037] In order to more clearly illustrate the technical solutions in the embodiments of the present disclosure, the drawings needed to be used in the embodiments will be briefly introduced. Obviously, the drawings in the following description are only some embodiments of the present disclosure, and other drawings can be obtained by those skilled in the art without creative effort based on these drawings.

[0038] Figure 1 is a structural schematic diagram of a vacuum stability test device and test system provided by the embodiments of the present disclosure;

[0039] Figure 2 is a relative position schematic diagram of a sliding table, a driving member and a shielding box provided by the embodiments of the present disclosure;

[0040] Figure 3 is a structural sectional view of a test tube provided by the embodiments of the present disclosure;

[0041] Figure 4 is a structural schematic diagram of a first connecting part of a connector provided by the embodiments of the present disclosure;

[0042] Figure 5 is a structural sectional view of a test tube provided by another embodiment of the present disclosure;

[0043] Figure 6 is a control logic diagram of a vacuum stability test system provided by the embodiments of the present disclosure;

[0044] Figure 7 is a flow schematic diagram of a vacuum stability test method provided by the embodiments of the present disclosure.

[0045] The reference signs in the drawings respectively represent:

[0046] 1, test tube; 11, tube body assembly; 111, stainless steel outer tube; 1111, tube body part; 1112, flange part; 11121, ring groove; 112, quartz inner tube; 113, sealing ring; 12, connector; 121, first connecting part; 1211, first threaded hole; 1212, second threaded hole; 1213, air hole; 122, second connecting part; 1221, first connecting port; 1222, second connecting port; 123, third connecting part;

[0047] 2, data acquisition module; 21, sensor; 22, wire harness; 23, pressure sensor; 24, temperature sensor;

[0048] 3, heating module; 31, shell; 32, heating groove;

[0049] 4, moving module; 41, track piece; 411, first position; 412, second position; 42, sliding table piece; 421, loading part; 4211, accommodating hole; 4212, fixing hole; 43, driving piece;

[0050] 5, control module; 51, early warning unit;

[0051] 6, shielding box;

[0052] 7, wire harness receiver;

[0053] 8, data line guide rod;

[0054] 9, pressure regulating valve. DETAILED DESCRIPTION

[0055] Hereinafter, exemplary embodiments will be described in detail with reference to the accompanying drawings. In the following description, unless otherwise indicated, the same numbers in different drawings represent the same or similar elements. The embodiments described in the following exemplary embodiments are not representative of all embodiments consistent with the present disclosure. Rather, they are merely examples of devices and methods consistent with some aspects of the present disclosure as detailed in the appended claims.

[0056] In the description of the present disclosure, it should be understood that the terms "center", "longitudinal", "transverse", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", "axial", "radial", "circumferential" and the like indicate the orientation or positional relationship based on the orientation or positional relationship shown in the drawings, and are only for the convenience of describing the present disclosure and simplifying the description, and do not indicate or imply that the indicated device or element must have a particular orientation, be constructed and operated in a particular orientation, and therefore cannot be understood as a limitation on the present disclosure.

[0057] Unless otherwise defined, all technical terms used in the embodiments of the present disclosure have the same meanings as commonly understood by those of ordinary skill in the art.

[0058] The dynamic vacuum stability test method is mainly used for testing the thermal stability of energetic materials (including explosives, propellants, pyrotechnics, explosive waste, etc.) under certain temperature and vacuum conditions. The basic principle is to add the sample to be tested (limited to solid samples) into a glass test tube, which needs to be vacuum sealed. After the test tube is vacuumed, it is placed in a heating module at a specific temperature (for example, 100°C), and continuously heated for 40 hours or more.

[0059] The sample to be tested will decompose and release gas when heated. After a specified heating time, the operator needs to take the test tube out of the heating module and cool it to room temperature naturally. The pressure sensor measures the gas pressure in the test tube, and the volume of the gas released by the sample under standard conditions is calculated by formula.

[0060] The vacuum stability test usually takes a long time, at least 40 hours for one test cycle, up to 10 days or even several months. Therefore, in order to improve the efficiency of the test, multiple parallel tests are usually carried out at the same time. If 10 tests are carried out at the same time, the total amount of sample to be tested is 50g. If an explosion occurs during the operation, it will seriously threaten the personal safety of the operator.

[0061] After heating is completed, the operator needs to take the test tube out of the heating module at 100°C and place it in room temperature for cooling. Since the sample to be tested has been heated at high temperature for a long time, it may become more unstable, and a slight shake may cause an explosion, which is a great risk.

[0062] In addition, in the related art, the connection end of the pressure sensor of the vacuum stability tester and the glass test tube are sealed by filling vacuum silicone grease. Under the conditions of long-time heating and high vacuum, the vacuum silicone grease on the sealing surface will break to some extent or completely, causing different degrees of air leakage, which will cause deviations in the test results. In multiple parallel tests, the degree of air leakage on the sealing surface of each test tube is different, and the influence of air leakage cannot be eliminated by correcting the system deviation, so the accuracy and repeatability of the test results are poor.

[0063] Therefore, the present disclosure provides a vacuum stability test device. The taking and placing of the test tube do not need to be manually operated, and the operator remotely operates the taking and placing of the test tube through software, thereby completely eliminating the unpredictable explosion risk in the test process and the harm to the operator.

[0064] In addition, the vacuum sealing of the test tube is realized by a ring groove and a sealing ring, which has a very small risk of failure under the conditions of heating and vacuum, and can ensure the accuracy and repeatability of the test results.

[0065] In order to make the purpose, technical scheme and advantages of the present disclosure clearer, the embodiments of the present disclosure will be described in further detail below with reference to the drawings.

[0066] Figure 1 FIG. 1 is a structural schematic diagram of a vacuum stability test device provided by an embodiment of the present disclosure; Figure 2 FIG. 2 is a schematic diagram of the relative positions of the sliding table 42, the driving member 43 and the shielding box 6 provided by an embodiment of the present disclosure.

[0067] On the one hand, in combination with Figure 1 ,2 The embodiment shown provides a vacuum stability test device, which comprises a test tube 1, a data acquisition module 2, a heating module 3 and a moving module 4.

[0068] The test tube 1 is connected with the data acquisition module 2, the test tube 1 is used for containing a sample to be tested, and the data acquisition module 2 is used for acquiring sample data in the test tube 1.

[0069] The heating module 3 is used for heating the test tube 1, the heating module 3 can generate heat through an electric heating element (such as a heating resistor, an electric ceramic sheet), heat the test tube 1, and accurately control the heating efficiency so that the temperature of the test tube 1 is constant at a target level or continuously in a target range,

[0070] Exemplarily, the heating module 3 adopts a constant temperature bath device, a heating furnace, a metal thermostat and the like.

[0071] The moving module 4 comprises a track member 41, a sliding table member 42 and a driving member 43; the sliding table member 42 is movably located on the track member 41, the driving member 43 is connected with the sliding table member 42, and the driving member 43 is used for driving the sliding table member 42 to move along the track member 41.

[0072] Exemplarily, the driving member 43 comprises a stepping motor.

[0073] The sliding table member 42 comprises a loading part 421, the test tube 1 is connected with the loading part 421; the position of the sliding table member 42 on the track member 41 comprises a first position 411 and a second position 412.

[0074] When the sliding table member 42 is located at the first position 411, the test tube 1 is located in the heating module 3, the heating module 3 can heat the test tube 1, and the vacuum stability test is performed.

[0075] When the sliding table member 42 is located at the second position 412, the test tube 1 is located outside the heating module 3, the test tube 1 stops heating, and the operator can take the test tube 1 with a relatively stable state from the loading part 421 of the sliding table member 42 after the test tube 1 is naturally cooled, and the whole test process is completed.

[0076] In addition, in the test accuracy stage, the sliding table member 42 is located at the second position 412, the operator connects the test tube 1 containing the sample to be tested to the sliding table member 42, and since the test tube 1 is away from the heating module 3 at this time, the state is relatively stable, and the safety risk is low.

[0077] The vacuum stability test device of the embodiment comprises a test tube 1, a data acquisition module 2, a heating module 3 and a moving module 4, wherein the moving module 4 comprises a track piece 41, a sliding table piece 42 and a driving piece 43, the sliding table piece 42 is loaded with the test tube 1, the sliding table piece 42 can move along the track piece 41 under the driving of the driving piece 43, when the sliding table piece 42 is located at a first position 411, the test tube 1 is put into the heating module 3, when the sliding table piece 42 is located at a second position 412, the test tube 1 is taken out of the heating module 3, the test tube 1 is taken and placed without manual operation, the moving precision is high, the test tube 1 can be effectively prevented from colliding and shaking, the operator remotely operates the taking and placing of the test tube 1, and the test safety is better.

[0078] In some possible implementation ways, the data acquisition module 2 comprises a sensor 21 and a wire harness 22, the sensor 21, for example, a pressure sensor or a temperature sensor, can measure the temperature and the system pressure of the sample to be tested under the test condition.

[0079] Compared with the test of pressure in the traditional scheme, the embodiment can obtain more information by simultaneously monitoring the temperature, can obtain the temperature data and the pressure data corresponding to each moment of the sample to be tested, and can better test the thermal stability, the stability and the compatibility of the sample through the data.

[0080] In other possible implementation ways, the moving module 4 further comprises a limit switch and a stopper, one of the limit switch and the stopper is connected with the sliding table piece 42 and moves with the sliding table piece 42, and the other is located on the track piece 41 or the heating module 3, so as to assist the limiting when the sliding table piece 42 moves along the track piece 41, so that the sliding table piece 42 accurately stops at the first position 411 and the second position 412, and the collision between the sliding table piece 42 and the heating module 3 is prevented, and a safety accident is caused.

[0081] In combination Figure 1 As shown in the figure, in some embodiments, the heating module 3 comprises a shell 31, the surface of the shell 31 has a heating groove 32 extending into the interior of the shell 31, one end of the track piece 41 is connected with the shell 31, and the other end extends away from the shell 31; when the sliding table piece 42 is at the first position 411, the sliding table piece 42 is close to the surface of the shell 31, and the test tube 1 is located in the heating groove 32; when the sliding table piece 42 is at the second position 412, the sliding table piece 42 is away from the surface of the shell 31, and the test tube 1 is located outside the heating groove 32.

[0082] One end of the track piece 41 is connected with the shell 31, and the other end extends away from the shell 31, and when the sliding table piece 42 moves along the track piece 41, it naturally moves in the direction close to and away from the heating module 3.

[0083] The first position 411 is close to the heating module 3, the sliding table part 42 is close to the surface of the shell 31, and the test tube 1 is located in the heating groove 32. The second position 412 is away from the heating module 3, the sliding table part 42 is away from the surface of the shell 31, and the test tube 1 is located outside the heating groove 32.

[0084] The compactness of the test device is high, the track part 41 is connected with the heating module 3, unnecessary relative movement between the movable module 4 and the heating module 3 can be avoided, the test tube 1 cannot enter the heating groove 32, the stability of the whole system can be increased, the possibility of shaking of the test tube 1 can be reduced, and the safety of the test process can be improved.

[0085] As shown in Figure 1 , 2 In some embodiments, the track part 41 is connected perpendicularly to the surface of the shell 31, and the sliding table part 42 is parallel to the surface of the shell 31; the number of loading parts 421 is at least two, and the at least two loading parts 421 are spaced apart on the sliding table part 42; the number of heating grooves 32 is at least two, and the at least two heating grooves 32 are spaced apart on the surface of the shell 31, and the position of each heating groove 32 corresponds to one loading part 421.

[0086] The heating module 3 is a high-temperature and large-volume component in the system, which has high quality and stability, can provide stable support for the track part 41, and is conducive to improving the stability of the movable module 4.

[0087] The track part 41 is perpendicular to the surface of the shell 31 of the heating module 3, the sliding table part 42 is parallel to the surface of the shell 31, and the movement direction of the sliding table part 42 during the movement of the sliding table part 42 along the track part 41 is perpendicular to the surface of the shell 31 of the heating module 3. The movement track of the sliding table part 42 is simple and direct, which can effectively avoid the shaking of the test tube 1 during the movement of the sliding table part 42.

[0088] In addition, the shape of the heating groove 32 needs to be set as a cylindrical shape that conforms to the outer shape of the test tube 1. When the test tube 1 moves along the sliding table part 42 in a direction perpendicular to the surface of the shell 31, the movement direction of the test tube 1 is parallel to its axis, the test tube 1 is directly inserted into the heating groove 32 along the axis, or the test tube 1 is directly pulled out of the heating groove 32 along the axis, which can avoid collision or shaking of the test tube 1.

[0089] As shown in Figure 1 , 2 In some embodiments, the sliding table part 42 is a circular ring plate part, and the track part 41 passes through the sliding table part 42; the at least two loading parts 421 are spaced apart on the sliding table part 42 in a circumferential direction, and the at least two heating grooves 32 are spaced apart on the surface of the shell 31 around the track part 41.

[0090] In this embodiment, the slide 42 is an annular plate, the track 41 passes through the middle of the slide 42, and at least two loading parts 421 are circumferentially spaced on the slide 42. Correspondingly, at least two heating grooves 32 are circumferentially spaced on the surface of the housing 31 around the track 41.

[0091] For example, at least two loading portions 421 are evenly spaced circumferentially on the slide 42, and correspondingly, at least two heating grooves 32 are evenly spaced circumferentially on the surface of the housing 31.

[0092] For example, 10 loading sections 421 are evenly arranged around the slide 42, which can connect 10 test tubes 1 at the same time and support 10 samples to be tested.

[0093] For example, the track member 41 is vertically connected to the upper end face of the housing 31 of the heating module 3.

[0094] Combination Figure 1 , 2 As shown, in some embodiments, the vacuum stability testing device includes a shielding box 6 located at the end of the track member 41 away from the housing 31; a drive member 43 is located inside the shielding box 6 and is connected to the slide member 42 via a transmission mechanism.

[0095] In the vacuum stability testing apparatus of this embodiment, the data acquisition module 2 relies on the sensor 21 to acquire pressure data. The drive unit 43 generates electromagnetic radiation during operation, which can interfere with the signal from the sensor 21. Therefore, the drive unit 43 is positioned at the end of the track component 41 furthest from the housing 31 and enclosed within the shielding box 6. The drive unit 43 is located far from the test tube 1 and is shielded by the shielding box 6.

[0096] For example, the drive unit 43 includes a stepper motor. The transmission mechanism includes, but is not limited to, a ball screw mechanism, a rack and pinion transmission mechanism, a worm gear transmission mechanism, etc.

[0097] Combination Figure 1 , 2 As shown, in some embodiments, the vacuum stability testing apparatus further includes a wire harness receiver 7, which is located at the end of the track member 41 away from the housing 31, and is used to receive the wire harness 22 of the data acquisition module 2.

[0098] The wire harness organizer 7 is located at the end of the track component 41 away from the housing 31. It can effectively gather all the wire harnesses 22 of the data acquisition modules 2 that are circumferentially spaced around the slide component 42, and ensure that all wire harnesses 22 do not affect the movement of the data acquisition modules 2 along the track component 41 with the test tube 1 and the slide component 42.

[0099] Exemplarily, the wire harness receiver 7 is integrated with the shielding box 6, the shielding box 6 is located at the lower layer of the wire harness receiver 7, and the wire harness receiver 7 is located at the upper layer of the shielding box 6.

[0100] For example, 10 transmission connection ends of the wire harness 22 are evenly arranged on the wall surface around the wire harness receiver 7.

[0101] In combination Figure 2 , 3 As shown in FIG. 1, in some embodiments, the test tube 1 comprises a tube assembly 11 for containing a sample to be tested and a connector 12, the connector 12 comprises a first connecting part 121, a second connecting part 122 and a third connecting part 123, the first connecting part 121 is in sealing connection with the opening of the tube assembly 11 and is connected with the loading part 421, the second connecting part 122 is connected with the data acquisition module 2, and the third connecting part 123 is connected with the pressure regulating valve 9.

[0102] The test tube 1 of the embodiment comprises a tube assembly 11 for containing a sample to be tested and a connector 12, the connector 12 is connected with the data acquisition module 2, the sliding table 42 and the pressure regulating valve 9, and the connector 12 has a first connecting part 121, a second connecting part 122 and a third connecting part 123, the first connecting part 121 is in sealing connection with the opening of the tube assembly 11 and is connected with the loading part 421, the second connecting part 122 is connected with the data acquisition module 2, and the third connecting part 123 is connected with the pressure regulating valve 9.

[0103] Exemplarily, referring to Figure 3 As shown in FIG. 1, the first connecting part 121 has a vent hole 1213, which is in communication with the tube assembly 11 and can transmit the pressure in the tube assembly 11 to the data acquisition module 2.

[0104] The second connecting part 122 is in sealing connection with the data acquisition module 2 (for example, a pressure sensor) through a steel connecting pipe with a sealing joint and a conical snap ring. The third connecting part 123 is in sealing connection with the pressure regulating valve 9 through a steel connecting pipe with a sealing joint and a conical snap ring.

[0105] The pressure regulating valve 9 is used for vacuumizing the test tube 1 at the beginning of the test and releasing the pressure of the test tube 1 after the test is completed. Exemplarily, the pressure regulating valve 9 is a manual regulating valve.

[0106] For example, when the test tube 1 is subjected to vacuumizing by using the pressure regulating valve 9, a hose is used to connect the vacuum pump and the pressure regulating valve 9, the vacuum pump is turned on, and the pressure regulating valve 9 is opened to vacuumize the test tube 1. Alternatively, the pressure in the test tube 1 is monitored in real time by the data acquisition module 2, and the test tube 1 is vacuumized to a target vacuum degree, and the pressure regulating valve 9 is closed.

[0107] In combination Figure 3 、 4 As shown in FIG. 11, in some embodiments, the tube body assembly 11 includes a stainless steel outer tube 111, a quartz inner tube 112, and a sealing ring 113. The stainless steel outer tube 111 includes a tube body portion 1111 and a flange portion 1112. The quartz inner tube 112 is located in the tube body portion 1111. The flange portion 1112 is located at an opening of the tube body portion 1111, and an end surface of the flange portion 1112 has a ring groove 11121 accommodating the sealing ring 113. The flange portion 1112 is connected with the first connecting portion 121, and the sealing ring 113 seals a gap between the flange portion 1112 and the first connecting portion 121.

[0108] The tube body assembly 11 of the present embodiment includes the stainless steel outer tube 111 and the quartz inner tube 112. The stainless steel has high strength and is explosion-proof. Even if an explosion occurs in the sample to be tested during the test, the explosion is confined in the stainless steel outer tube 111, and the impact on the surrounding environment and personnel is small.

[0109] The stainless steel outer tube 111 is mechanically connected (e.g., screw connection) with the first connecting portion 121 of the connector 12 by using the flange portion 1112 thereon, and a higher connection strength can be obtained. The ring groove 11121 accommodating the sealing ring 113 is provided on the flange portion 1112, and the sealing ring 113 seals the gap between the flange portion 1112 and the first connecting portion 121 when the flange portion 1112 is connected with the first connecting portion 121. Compared with the traditional silica gel sealing scheme, the sealing ring 113 has better sealing performance, and as the connection strength of the flange portion 1112 and the first connecting portion 121 increases, the pressure on the sealing ring 113 increases, and the sealing effect is better.

[0110] In addition, the quartz inner tube 112 used in the present embodiment is only used to accommodate the sample to be tested, and does not need to be sealed and connected, so that the cost thereof can be reduced, and the quartz inner tube 112 can be used as a disposable consumable, and the complex cleaning work of the glass test tube can be saved.

[0111] In some embodiments, the sealing ring 113 is a fluororubber sealing ring 113. For example, the sealing ring 113 is an O-shaped sealing ring 113.

[0112] In some possible implementations, the sealing ring 113 is arranged on the flange portion 1112 of the stainless steel outer tube 111. Figure 4As shown, the first connecting part 121 includes a circular region and a rectangular region. The vent hole 1213 is located in the middle of the circular region of the first connecting part 121, and six first threaded holes 1211 are uniformly arranged around the circular region, which can be screwed with the flange part 1112, and screwed along a circumference of the flange part 1112 to uniformly and tightly seal the stainless steel outer tube 111 and the first connecting part 121.

[0113] The rectangular region of the first connecting part 121 has two second threaded holes 1212. Correspondingly, the sliding table part 42 is provided with a receiving hole 4211 through which the stainless steel outer tube 111 passes, and one side of the receiving hole 4211 is provided with two fixing holes 4212, which are screwed with the two second threaded holes 1212 through two screws to fixedly connect the connector 12 and the sliding table part 42.

[0114] To further show the sealing performance of the embodiment, the following air leakage test is designed:

[0115]

[0116] In the above test, test tubes 1-5 are test tubes sealed by related technologies, and test tubes 6-10 are test tube 1 of the embodiment of the present application.

[0117] The test results show that:

[0118] After 48 hours, the maximum air leakage of test tubes 1-5 is 3.156 ml (test tube 4), the minimum is 0.022 ml (test tube 3), the fluctuation range is 1.831 ml, and the average is 1.0328 ml; while the maximum air leakage of test tubes 6-10 is 0.004 ml (test tube 10), the minimum is 0.002 ml (test tubes 6 and 8), the fluctuation range is only 0.002 ml, and the average air leakage is 0.0028 ml.

[0119] After 96 hours, the maximum air leakage of test tubes 1-5 is 6.228 ml (test tube 4), the minimum is 0.097 ml (test tube 1), the fluctuation range is 6.131 ml, and the average is 1.7218 ml; while the maximum air leakage of test tubes 6-10 is 0.006 ml (test tube 10), the minimum is 0.003 ml (test tube 6), the fluctuation range is only 0.003 ml, and the average air leakage is 0.0044 ml.

[0120] After 30 days, the maximum air leakage of the test tubes 1-5 was 13.285 ml (No. 5 test tube), the minimum was 1.021 ml (No. 2 test tube), the fluctuation range was 12.264 ml, and the average was 6.363 ml; while the maximum air leakage of the test tubes 6-10 was 0.032 ml (No. 8 test tube), the minimum was 0.021 ml (No. 6 test tube), the fluctuation range was only 0.011 ml, and the average air leakage was 0.0272 ml.

[0121] The test tube 1 provided by the embodiment has an air leakage rate of less than 0.002 ml / 48 hours under extreme vacuum conditions, which is only 1 / 30 of the related art. The long-term sealing air leakage rate is 0.021 ml / 30 days, and the sealing effect is much better than the related art. The peak, fluctuation range, and average of the air leakage amount and other parameters closely related to the test results are greatly improved.

[0122] In addition, since the vacuum silicone seal has certain vacuum degree and temperature requirements, if the pressure in the test tube approaches or reaches 1 bar during the test, the silicone seal surface of the glass test tube and the pressure sensor will be completely broken, resulting in test failure. If the test temperature is higher than 150℃, the sealing performance of the vacuum silicone will fail, resulting in test failure.

[0123] Therefore, the related technical solution using vacuum silicone for filling and sealing is only suitable for samples with a gas release amount of less than 1 bar and a test temperature of less than 150℃

[0124] The vacuum stability test device of the embodiment has a maximum test temperature of 300℃ and a maximum pressure in the test tube 1 of 100 bar, which is 100 times that of the related art. It is not only suitable for thermal stability tests under vacuum conditions, but also suitable for thermal stability tests under high pressure conditions with inert gas protection, and has a wider application field.

[0125] In combination with Figure 5 As shown in FIG. 1, in some possible implementations, the second connecting part 122 includes a first connecting port 1221 and a second connecting port 1222, and the data acquisition module 2 includes a pressure sensor 23 and a temperature sensor 24; the pressure sensor 23 is connected with the first connecting port 1221 and communicates with the pipe body assembly 11, and is used to acquire a pressure parameter; the temperature sensor 24 is connected with the second connecting port 1222 and extends into the pipe body assembly 11 to contact the sample to be tested, and is used to acquire a temperature parameter.

[0126] The second connecting part 122 of the embodiment comprises a first connecting port 1221 and a second connecting port 1222, both of which are in communication with the air hole 1213. The pressure sensor 23 is connected with the first connecting port 1221, and is in communication with the internal gaseous environment of the pipe body assembly 11 (specifically, the quartz inner pipe 112) through the channel in the connector 12, and can detect the air pressure parameter of the quartz inner pipe 112. The temperature sensor 24 is connected with the second connecting port 1222, and the probe of the temperature sensor 24 can extend to the inside of the pipe body assembly 11 (specifically, the quartz inner pipe 112) and directly contact with the sample to be tested, so as to accurately detect the temperature parameter of the sample to be tested.

[0127] The vacuum stability test device of the embodiment can simultaneously connect the temperature sensor 212 and the pressure sensor 211 to obtain the temperature and pressure data of the sample under the experimental conditions, and the prior art scheme can only connect the pressure sensor. The test of temperature can provide more information, and through the data, the thermal stability, stability and compatibility of the sample can be more accurately evaluated.

[0128] Exemplarily, the second connecting port 1222 is coaxially arranged with the air hole 1213 and the pipe body assembly 11 (specifically, the quartz inner pipe 112), so as to ensure that the probe of the temperature sensor 24 can directly contact with the sample to be tested.

[0129] It should be noted that in the description of the present disclosure, it should be explained that unless otherwise explicitly specified and limited, the terms "mounting", "connecting", "connecting" should be understood in a broad sense, for example, it can be fixedly connected, or it can be detachably connected, or integrally connected; it can be mechanically connected; it can be directly connected, or indirectly connected through an intermediate medium; it can be the internal communication of two elements or the interaction relationship between two elements. For those skilled in the art, the specific meaning of the above terms in the present disclosure can be understood according to the specific circumstances.

[0130] In addition, the terms "first", "second" are only for descriptive purposes, and cannot be understood as indicating or implying relative importance or implicitly indicating the number of indicated technical features. Therefore, the features limited by "first", "second" can explicitly or implicitly include one or more features. In the description of the present disclosure, the meaning of "multiple" is two or more, unless otherwise explicitly specified and limited.

[0131] It should be noted that in the present disclosure, unless otherwise explicitly specified and limited, the first feature is "on" or "under" the second feature can include that the first and second features are in direct contact, or that the first and second features are not in direct contact but are in contact through another feature between them. Moreover, the first feature is "on", "above" and "on" the second feature includes that the first feature is directly above and obliquely above the second feature, or only indicates that the first feature is higher in horizontal height than the second feature. The first feature is "under", "below" and "under" the second feature includes that the first feature is directly below and obliquely below the second feature, or only indicates that the first feature is lower in horizontal height than the second feature.

[0132] On the other hand, in combination with Figure 1 、 6 It is shown that the present embodiment provides a vacuum stability test system, which comprises the vacuum stability test device of the present disclosure and a control module 5.

[0133] The control module 5 is electrically connected with the data acquisition module 2, the heating module 3 and the driving member 43 respectively.

[0134] Exemplarily, the control module 5 is connected with the data acquisition module 2, and can control the start and stop of the data acquisition module 2, and receive the sample data returned by the data acquisition module 2, which includes but is not limited to electrical signals reflecting the air pressure and temperature in the test tube 1.

[0135] Another exemplary, the control module 5 is connected with the heating module 3, and can control the start and stop of the heating module 3, and the working parameters such as heating power and temperature of the heating module 3.

[0136] Still another exemplary, the control module 5 is electrically connected with the driving member 43, and can control the start and stop of the driving member 43, and the output speed and output power. Further, the control module 5 can control the driving member 43 to drive the sliding table member 42 to move along the track member 41, so that the sliding table member 42 stays at the first position 411, stays at the second position 412, moves from any position to the first position 411, moves from any position to the second position 412, and so on.

[0137] When the moving module 4 has a limit switch and a limit stopper, the limit switch and the limit stopper are electrically connected with the control module 5 or the driving member 43, and when the limit switch and the limit stopper send a signal that the position is reached, the control module 5 controls the driving member 43 to stop, or the driving member 43 stops by itself.

[0138] When the wire harness receiver 7 is included, the wire harness receiver 7 is connected with the data line guide rod 8, and 10 wire harnesses 22 in the wire harness receiver 7 are connected into a bus through the transmission connection end and then connected into the data line guide rod 8, and then connected into the control module through the data line guide rod 8.

[0139] Exemplarily, the control module 5 comprises a communication unit and an analysis unit, the communication unit is electrically connected with the data acquisition module 2, receives the sample data transmitted by the data acquisition module 2, and the analysis unit analyzes the sample data.

[0140] In combination Figure 5 As shown in the figure, in some embodiments, the control module 5 comprises a pre-warning unit 51, which can send a pre-warning signal when the sample data exceeds the target level.

[0141] During the vacuum stability test of the energetic material, the reaction of the sample to be tested will inevitably intensify and be close to out of control, at this time, the control module 5 can determine the occurrence of danger according to the temperature or pressure in the test tube 1, analyze and evaluate, and control the pre-warning unit 51 to send a pre-warning signal to the outside world. The pre-warning signal includes but is not limited to sound signal, light signal and the like.

[0142] Exemplarily, the pre-warning unit 51 is electrically connected with the heating module 3 and the driving member 43, after the occurrence of danger, the heating module 3 is controlled to stop heating, and the driving member 43 is controlled to drive the sliding table member 42 to move, so that the test tube 1 exits from the heating module 3 and the test is suspended.

[0143] The vacuum stability test system of the embodiment has the functions of explosion risk identification and pre-warning, and explosion suppression. The control module 5 analyzes the data curve and finds that the sample to be tested has an explosion tendency, immediately triggers an alarm, turns on a buzzer to warn the operator, and at the same time commands the driving member 43 to drive the sliding table member 42 to move, so that the test tube 1 leaves the heating module 3. Once the test tube 1 leaves the heat source, the reaction is effectively suppressed, and the temperature and pressure in the test tube rapidly decrease, and the explosion risk is greatly reduced.

[0144] After the pre-warning unit 51 is triggered, the operator cannot directly go to the experimental site, and can remotely observe the test site in the first time through the camera connected with the control module 5, and judge the reaction process through the real-time temperature and pressure data displayed by the control module 5. Once the test tube 1 leaves the heat source, the reaction is effectively suppressed, and the temperature and pressure in the test tube decrease, and the operator can enter the test site for inspection only after confirming that the danger is removed.

[0145] On the other hand, in combination Figure 7 As shown in the figure, the embodiment provides a vacuum stability test method of an energetic material, which adopts the vacuum stability test system in the disclosure; the method comprises:

[0146] S1, the control module 5 controls the driving member 43 to start, so that the sliding table member 42 is in the second position 412. Referring to Figure 1 As shown in the figure, at this time, the sliding table member 42 is located away from the heating module 3.

[0147] S2 places the sample to be tested into the test tube 1. Reference Figure 3 As shown in the figure, the sample to be tested is placed in the quartz inner tube 112, and the quartz inner tube 112 is then placed in the stainless steel outer tube 111. The sealing ring 113 is placed in the ring groove 11121, and the flange part 1112 of the stainless steel outer tube 111 is screwed and fixed to the first connecting part 121 of the connector 12 from below.

[0148] In some possible implementations, before step S2, or before the stainless steel outer tube 111 is connected to the connector 12, the data acquisition module 2 and the pressure regulating valve 9 are first connected to the second connecting part 122 and the third connecting part 123 of the connector 12 respectively, so as to avoid unnecessary shaking of the sample to be tested.

[0149] S3 connects the test tube 1 with the loading part 421. Reference Figure 2 、 4 The tube body assembly 11 of the test tube 1 is passed through the accommodating hole 4211 on the sliding table 42 from top to bottom until the first connecting part 121 of the connector 12 is attached to the upper surface of the sliding table 42, the second threaded hole 1212 of the rectangular area of the first connecting part 121 is aligned with the fixing hole 4212, and the connector 12 is fixed and connected to the sliding table 42 from below.

[0150] The above operation is repeated to connect multiple test tubes 1 to the sliding table 42.

[0151] In some possible implementations, after step S4, when the pressure regulating valve 9 is used to perform vacuumizing treatment on the test tube 1, a hose is used to connect the vacuum pump with the pressure regulating valve 9, the vacuum pump is turned on, and the pressure regulating valve 9 is opened to vacuumize the test tube 1. Optionally, the pressure in the test tube 1 is monitored in real time by the data acquisition module 2 and the control module 5, the vacuumizing is performed to a target vacuum degree, and the pressure regulating valve 9 is closed.

[0152] S4 controls the control module 5 to control the heating module 3 to start and monitor the temperature of the heating module 3. For example, the target temperature of the heating module 3 is set in the control module 5, the temperature control unit starts, the temperature sensor 21 in the heating module 3 measures the temperature in the heating groove 32 of the heating module 3 in real time, and an anti-overtemperature sensor is arranged in the heating module 3 to prevent the heating module 3 from accidentally heating up, causing the sample to be tested in the test tube 1 to overheat and explode.

[0153] S5 controls the control module 5 to control the control driving part 43 to start, so that the sliding table 42 moves to the first position 411, and the test tube 1 enters the heating groove 32. Optionally, the heating groove 32 is filled with an appropriate amount of silicone oil, and when the test tube 1 is located in the heating groove 32, the silicone oil fills the gap between the test tube 1 and the heating groove 32, so that the test tube 1 is heated more uniformly and stably.

[0154] S6 The control module 5 controls the data acquisition module 2 to start and receives the pressure data returned by the data acquisition module 2.

[0155] S7 After the set heating time is reached, the control module 5 issues an instruction, and the activity module 4 lifts the test tube 1 and issues a stop heating instruction to the heating module 3. The test tube 1 naturally cools to room temperature, and the pressure sensor 21 measures the gas pressure released by the sample to be tested. The control module 5 calculates the gas volume released by the sample to be tested under standard conditions, thereby completing the vacuum stability test of the sample to be tested.

[0156] The disclosed vacuum stability test method of the embodiment, and Figure 6 The method flowchart shown does not strictly limit the execution order of the steps, and some steps can be implemented in parallel, and some steps can be adjusted in the order of implementation.

[0157] For example, step S1 and step S2 can be implemented in parallel, and for example, step S6 can be adjusted between step S3 and step S4.

[0158] Those skilled in the art can adjust the implementation order of the steps according to actual needs during the testing process using the test system or test method provided by the present disclosure.

[0159] In the description of the present disclosure, the description of the terms "some embodiments", "one embodiment", "some embodiments", "illustrative embodiments", "example", "specific example", or "some examples" means that the specific features, structures, materials or characteristics described in conjunction with the embodiments or examples are included in at least one embodiment or example of the present disclosure.

[0160] The above only describes the embodiments of the present disclosure and does not limit the present disclosure. Any modification, equivalent replacement, improvement, etc. made within the principles of the present disclosure shall be included in the protection scope of the present disclosure.

Claims

1. A vacuum stability test device, characterized by, The vacuum stability test device comprises a test tube (1), a data acquisition module (2), a heating module (3) and a moving module (4); The test tube (1) is connected with the data acquisition module (2), the test tube (1) is used for accommodating the sample to be tested, and the data acquisition module (2) is used for acquiring the sample data in the test tube (1); The heating module (3) is used for heating the test tube (1); The moving module (4) comprises a track piece (41), a sliding table piece (42) and a driving piece (43); The sliding table piece (42) is movably located on the track piece (41), the driving piece (43) is connected with the sliding table piece (42), and the driving piece (43) drives the sliding table piece (42) to move along the track piece (41); The sliding table piece (42) comprises a loading part (421), and the test tube (1) is connected with the loading part (421); The position of the sliding table piece (42) on the track piece (41) comprises a first position (411) and a second position (412); When the sliding table piece (42) is located at the first position (411), the test tube (1) is located in the heating module (3); when the sliding table piece (42) is located at the second position (412), the test tube (1) is located outside the heating module (3); The test tube (1) comprises a tube body assembly (11) and a connector (12), and the tube body assembly (11) is used for accommodating the sample to be tested; The connector (12) comprises a first connecting part (121), a second connecting part (122) and a third connecting part (123); the first connecting part (121) is sealingly connected with the opening of the tube body assembly (11) and connected with the loading part (421), the second connecting part (122) is connected with the data acquisition module (2), and the third connecting part (123) is connected with a pressure regulating valve (9); The tube body assembly (11) comprises a stainless steel outer tube (111), a quartz inner tube (112) and a sealing ring (113); The stainless steel outer tube (111) comprises a tube body part (1111) and a flange part (1112); the quartz inner tube (112) is located in the tube body part (1111); the flange part (1112) is located at the opening of the tube body part (1111), and the end face of the flange part (1112) has a ring groove (11121) for accommodating the sealing ring (113); The flange part (1112) is connected with the first connecting part (121), and the sealing ring (113) seals the gap between the flange part (1112) and the first connecting part (121); The second connecting part (122) comprises a first connecting port (1221) and a second connecting port (1222), the data acquisition module (2) comprises a pressure sensor (23) and a temperature sensor (24); The pressure sensor (23) is connected with the first connecting port (1221) and communicates with the pipe body assembly (11) to collect pressure parameters; the temperature sensor (24) is connected with the second connecting port (1222) and extends into the pipe body assembly (11) to contact the sample to be tested to collect temperature parameters.

2. The vacuum stability test apparatus of claim 1, wherein, The heating module (3) comprises a shell (31); the surface of the shell (31) is provided with heating grooves (32) extending into the interior of the shell (31); One end of the track member (41) is connected with the shell (31), and the other end extends away from the shell (31); When the sliding table member (42) is in the first position (411), the sliding table member (42) is close to the surface of the shell (31), and the test tube (1) is located in the heating groove (32); When the sliding table member (42) is in the second position (412), the sliding table member (42) is away from the surface of the shell (31), and the test tube (1) is located outside the heating groove (32).

3. The vacuum stability test apparatus of claim 2, wherein, The track member (41) is connected perpendicularly to the surface of the shell (31), and the sliding table member (42) is parallel to the surface of the shell (31); The number of the loading portions (421) is at least two, and the at least two loading portions (421) are spaced apart on the sliding table member (42); the number of the heating grooves (32) is at least two, and the at least two heating grooves (32) are spaced apart on the surface of the shell (31), and the position of each heating groove (32) corresponds to one loading portion (421).

4. The vacuum stability test apparatus of claim 3, wherein, The sliding table member (42) is a circular plate, and the track member (41) penetrates the sliding table member (42); The at least two loading portions (421) are spaced apart circumferentially on the sliding table member (42), and the at least two heating grooves (32) are spaced apart circumferentially on the surface of the shell (31) around the track member (41).

5. The vacuum stability test apparatus of claim 3, wherein, The vacuum stability test device comprises a shielding box (6) located at the end of the track member (41) away from the shell (31); The driving member (43) is located in the shielding box (6) and connected with the sliding table member (42) through a transmission mechanism.

6. The vacuum stability test apparatus of claim 5, wherein, The vacuum stability test device further comprises a wire harness receiver (7) located at the end of the track member (41) away from the shell (31), and the wire harness receiver (7) is used for receiving the wire harness (22) of the data acquisition module (2).

7. A vacuum stability test system characterized by, The vacuum stability test device comprises the control module (5) and the data acquisition module (2), the heating module (3) and the driving member (43); The control module (5) is electrically connected with the data acquisition module (2), the heating module (3) and the driving member (43) respectively to control the working states of the data acquisition module (2), the heating module (3) and the driving member (43) respectively; The control module (5) comprises a pre-warning unit (51) capable of sending a pre-warning signal when the sample data exceeds a target level.

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