Pressure sensor performance testing device and method for gunpowder vacuum stability test

Abstract

The invention provides a device and a method for testing the performance of a pressure sensor for a vacuum stability test of explosives and powders, the device comprises a box body, an inert gas chamber and a corrosive gas chamber are arranged in the box body, and the top end of the corrosive gas chamber is provided with a to-be-detected pressure sensor; a balance pipe is arranged between the bottom end of the inert gas chamber and the bottom end of the corrosive gas chamber, and isolation liquid is contained in the balance pipe and is mercury or tetradecahydrophenanthrene perfluoride. The two ends of the balance pipe are communicated with the inert gas chamber and the corrosive gas chamber respectively, and an inert gas control valve and a corrosive gas control valve are arranged at the communication position. According to the invention, the isolation liquid freely moves in the balance pipe without height difference to realize pressure adjustment, an organic film cutting piece of an existing device is replaced, and high-temperature resistance and corrosion resistance testing and examination of the high-precision pressure sensor can be rapidly, accurately and conveniently realized.

Description

Technical Field

[0001] The invention belongs to the technical field of vacuum stability test of explosives and relates to the high temperature and corrosion resistance of a high-precision pressure sensor used in the vacuum stability test of explosives and relates specifically to a performance testing device and method of a pressure sensor used in the vacuum stability test of explosives. Background Art

[0002] Vacuum stability and compatibility of explosives are safety properties that must be obtained when selecting raw materials during the explosives formulation design stage. Most explosives contain C, N and O elements, which produce corrosive gases such as CO when decomposed. X and NO X , since the critical value in the stability and compatibility judgment standard is small, such as the stability is qualified when the degassing volume is ≤2 mL, the pressure sensor needs to be corrosion-resistant and high-precision. The general temperature for stability and compatibility is 90-120℃, and the temperature for heat-resistant explosives is 260℃, but when studying the thermal decomposition of explosives, the test temperature will be higher, generally greater than 200℃, and for heat-resistant explosives it can exceed 300℃. At such a high temperature, on the one hand, in order to ensure the accuracy of gas measurement, it is necessary to ensure the temperature uniformity of the decomposition gas of the explosive, that is, the sensitive chip of the pressure sensor should also be at the test temperature of the explosive, rather than being led out through the pipeline to make the pressure sensor at room temperature. On the other hand, the existing pressure sensor solves the temperature drift and time drift of the temperature sensor at high temperature through hardware and software algorithms based on the pressure input and electrical signal output at room temperature and different temperatures. Therefore, for the stability test of explosives, it is also necessary to test the high temperature resistance of the pressure sensor used in the test. In addition, for the vacuum stability and compatibility of explosives, the gas measurement method currently specified is a constant temperature test. Compared with the room temperature calibration method, calibrating the pressure sensor at the vacuum stability test temperature can further improve the measurement accuracy and avoid the temperature drift problem of the sensor. The vacuum stability test of explosives is a process in which explosives continuously decompose and release gas at a constant temperature. The pressure sensor is in a corrosive atmosphere and the concentration gradually increases. Based on the test requirements, it is necessary to establish a calibration and assessment device for pressure sensors in a high temperature corrosive environment.

[0003] The performance test device of the pressure sensor for the gunpowder vacuum stability test in the prior art mainly includes a corrosive gas chamber and a gas balance device. The gas balance device includes an air chamber and a deformable partition arranged in the air chamber. The partition divides the air chamber into a mutually independent corrosive gas chamber and an inert gas chamber. The device mainly has the following problems: ① When the device is used, the corrosive gas needs to be introduced first, which is likely to cause the partition to deform, and then the deformation of the partition is subjected to a certain corrosive pressure. Although the partition has a certain deformation margin, the pressure of the deformation is difficult to balance by the inert gas pressure adjusted by the subsequent high-precision pressure controller. Therefore, it is necessary to observe the deformation of the partition in actual operation, but the error of manual observation is large, time-consuming, and sometimes difficult to judge, which still cannot meet the assessment and calibration requirements of high-precision pressure sensors. ② The organic latex film used in the partition is easy to age and needs to be replaced regularly. ③ In order to reduce the corrosion of the partition by corrosive gas, the entire device needs to be cooled at low temperature, which further increases the inconvenience of operation. ④ Oil bath is used for high temperature. For temperatures above 200℃, the oil volatilizes greatly and causes serious pollution, which is not conducive to the test and is difficult to meet the requirements for the assessment and calibration of high-temperature sensors above 200℃. ⑤ The device has many parts, and the operation is cumbersome and inconvenient. The above problems directly reduce labor efficiency and calibration accuracy. Summary of the invention

[0004] In view of the defects and shortcomings of the prior art, the purpose of the present invention is to provide a pressure sensor performance testing device and method for a gunpowder vacuum stability test, so as to solve the technical problems in the prior art that the organic film partition of the pressure sensor performance testing device for a gunpowder vacuum stability test is easily corroded, the deformation and stress of the partition will affect the pressure balance accuracy, and the operation requires observation of the deformation of the partition, resulting in inconvenience in operation.

[0005] In order to solve the above technical problems, the present invention adopts the following technical solutions to achieve the above problems:

[0006] A performance testing device for a pressure sensor for a vacuum stability test of explosives comprises a box body; an inert gas chamber is arranged in one side of the box body, the inert gas chamber is arranged in a vertical direction, and the top of the inert gas chamber is open; a corrosive gas chamber is arranged in the other side of the box body, the corrosive gas chamber is arranged in a vertical direction, and the top of the corrosive gas chamber is open; the open top of the corrosive gas chamber is a sensor installation port, and the sensor installation port is used to install a pressure sensor to be tested; a balance tube is arranged between the bottom ends of the inert gas chamber and the corrosive gas chamber, and an isolation liquid is contained in the balance tube, and the isolation liquid is mercury or tetradecahydrophenanthrene perfluoride.

[0007] The balance pipe is arranged in the horizontal direction, and the lateral ends of the balance pipe are respectively connected to the inert gas chamber and the corrosive gas chamber. An inert gas control valve is arranged at the connection between the inert gas chamber and the balance pipe, and a corrosive gas control valve is arranged at the connection between the corrosive gas chamber and the balance pipe.

[0008] The inert gas chamber is provided with an air inlet, which is connected to an inert gas source through an inert gas delivery pipeline. An inert gas pressure controller is provided on the inert gas delivery pipeline, and the inert gas pressure controller is a high-precision pressure controller.

[0009] The corrosive gas chamber is provided with an air inlet, which is connected to a corrosive gas source through a corrosive gas delivery pipeline, and a corrosive gas pressure controller and a corrosive gas delivery control valve are arranged on the corrosive gas delivery pipeline.

[0010] The present invention also has the following technical features:

[0011] The balance tube is made of high borosilicate glass or stainless steel.

[0012] The front side of the box body is provided with an observation window, which is opposite to the balance pipe.

[0013] The outer side of the top of the corrosive gas chamber is provided with a heating jacket, which is connected to a temperature controller.

[0014] An adjusting knob is arranged at the bottom of the box.

[0015] A level indicator bubble is installed on the top of the box.

[0016] The pressure sensor to be detected is connected to a data acquisition instrument.

[0017] The present invention also protects a method for testing the performance of a pressure sensor for a vacuum stability test of explosives, the method using the performance testing device for a pressure sensor for a vacuum stability test of explosives as described above. The method comprises the following steps:

[0018] Step 1: After connecting the performance test device of the pressure sensor for the vacuum stability test of explosives, adjust the bottom adjustment knob, observe the level indicator bubble to ensure the adjustment is level, turn on the temperature controller and data acquisition instrument, and set the target temperature until the temperature is constant.

[0019] Step 2: Set the pressure target values ​​of the corrosive pressure controller and the inert gas pressure controller to the same, close the inert gas control valve and the corrosive gas control valve, open the corrosive gas delivery control valve, open the corrosive gas source and the inert gas source, and close the corrosive gas delivery control valve after the pressure is basically stable.

[0020] Step 3. Slowly and synchronously open the inert gas control valve and the corrosive gas control valve, observe the position of the isolation liquid through the observation window, adjust the opening size of the inert gas control valve and the corrosive gas control valve, and ensure that the isolation liquid is in the bottom balance pipe until the opening of the inert gas control valve and the corrosive gas delivery control valve reaches the maximum.

[0021] Step 4: After the inert gas pressure controller is stable, read the value through the data acquisition instrument and calculate the error by comparing it with the set value of the high-precision pressure controller.

[0022] Specifically, the target temperature is room temperature to 350° C., and the target pressure values ​​of the corrosive pressure controller and the inert gas pressure controller are 0.1 to 10 MPa.

[0023] The beneficial technical effects of the present invention compared with the prior art are as follows:

[0024] (I) The device of the present invention uses an inert isolation liquid to move freely in a balance tube without height difference to achieve pressure regulation, which can quickly achieve pressure balance and save pressure balance time. It only needs to adjust the balance tube to a level in advance. When adjusting the pressure, it only needs to slowly open the inflation valves of the corrosive gas and the inert gas at the same time, observe and ensure that the isolation liquid is in the horizontal section of the balance tube. The pressure standard value is read by a high-precision pressure controller, and no standard pressure sensor is required. Since the organic film partition of the existing device is replaced, the problems of the organic film partition being susceptible to corrosion, the deformation of the partition affecting the pressure balance accuracy, and the need to observe the deformation of the partition during operation are fundamentally avoided. It is very convenient in actual operation, saving the manpower and time required to observe the deformation of the partition. At the same time, it avoids the problem of inaccurate pressure testing caused by the deformation pressure of the partition, the aging problem of the partition, and the need for low-temperature cooling of the partition, reducing the auxiliary equipment. The present invention can quickly, accurately and conveniently realize the high temperature resistance and corrosion resistance testing and assessment of high-precision pressure sensors.

[0025] (II) The device of the present invention replaces the oil bath heating of the prior art with a resistance heating sleeve heating method. The heating sleeve is directly put on the outside of the corrosive gas chamber and only heats a section of the corrosive gas chamber, thereby avoiding the large oil pollution caused by oil bath temperature control, the poor working environment and the inability to meet high temperature (above 200°C). BRIEF DESCRIPTION OF THE DRAWINGS

[0026] Figure 1 This is a schematic diagram of the overall structure of a performance testing device for a pressure sensor used in a vacuum stability test of explosives.

[0027] The meanings of the symbols in the figure are: 1-box, 2-inert gas chamber, 3-corrosive gas chamber, 4-pressure sensor to be detected, 5-balance pipe, 6-isolation liquid, 7-inert gas control valve, 8-corrosive gas control valve, 9-inert gas delivery pipeline, 10-inert gas source, 11-inert gas pressure controller, 12-corrosive gas delivery pipeline, 13-corrosive gas source, 14-corrosive gas pressure controller, 15-corrosive gas delivery control valve, 16-observation window, 17-heating jacket, 18-adjustment knob, 19-level indicator bubble, 20-temperature controller, 21-data acquisition instrument.

[0028] The technical solution of the present invention is further described below in conjunction with embodiments. DETAILED DESCRIPTION

[0029] It should be noted that all materials and components used in the present invention, unless otherwise specified, are materials and components known in the art, such as:

[0030] Tetradecahydrophenanthrene perfluorinated compound is a compound known in the prior art, also known as perfluoro(tetradecahydrophenanthrene), pentafluorophenol diethyl trimethyl ester, and its molecular formula is C 14 F 24 , the CAS code is 306-91-2.

[0031] The inert gas pressure controller 11 adopts a high-precision pressure controller known in the prior art.

[0032] The corrosive gas pressure controller 14 adopts a conventional pressure controller known in the prior art.

[0033] In accordance with the above technical scheme, specific embodiments of the present invention are given below. It should be noted that the present invention is not limited to the following specific embodiments, and all equivalent changes made on the basis of the technical scheme of this application fall within the protection scope of the present invention.

[0034] Embodiment 1:

[0035] This embodiment provides a performance testing device for a pressure sensor used in a vacuum stability test of explosives. Figure 1As shown, it includes a box body 1; an inert gas chamber 2 is arranged in one side of the box body 1, the inert gas chamber 2 is arranged along the vertical direction, and the top of the inert gas chamber 2 is open; a corrosive gas chamber 3 is arranged in the other side of the box body 1, the corrosive gas chamber 3 is arranged along the vertical direction, and the top of the corrosive gas chamber 3 is open; the open top of the corrosive gas chamber 3 is a sensor installation port, and the sensor installation port is used to install a pressure sensor 4 to be detected; a balance pipe 5 is arranged between the bottom ends of the inert gas chamber 2 and the corrosive gas chamber 3, and the balance pipe 5 contains an isolation liquid 6; the balance pipe 5 is arranged in the horizontal direction, and the lateral ends of the balance pipe 5 are respectively connected to the inert gas chamber 2 and the corrosive gas chamber 3, and the inert gas chamber 2 and the balance pipe 5 are connected to the inert gas chamber 2 and the corrosive gas chamber 3. An inert gas control valve 7 is provided at the connection point of the pipe 5, and a corrosive gas control valve 8 is provided at the connection point between the corrosive gas chamber 3 and the balance pipe 5; an air inlet is provided on the inert gas chamber 2, and the air inlet of the inert gas chamber 2 is connected to the inert gas source 10 through an inert gas delivery pipeline 9, and an inert gas pressure controller 11 is provided on the inert gas delivery pipeline 9, and the inert gas pressure controller 11 is a high-precision pressure controller; an air inlet is provided on the corrosive gas chamber 3, and the air inlet of the corrosive gas chamber 3 is connected to the corrosive gas source 13 through a corrosive gas delivery pipeline 12, and a corrosive gas pressure controller 14 and a corrosive gas delivery control valve 15 are provided on the corrosive gas delivery pipeline 12.

[0036] As a specific solution of this embodiment, the balancing tube 5 is made of pressure-resistant high borosilicate glass, and the isolation liquid 6 filled inside is made of mercury. An observation window 16 is provided on the front side of the box body 1, and the observation window 16 is opposite to the balancing tube 5. In this embodiment, the position of the isolation liquid 6 is observed through the observation window 16 to ensure that the isolation liquid 6 is located in the bottom of the balancing tube 5 without generating a height pressure difference.

[0037] As a specific solution of this embodiment, a heating jacket 17 is provided on the outer side of the top of the corrosive gas chamber 3, and the heating jacket 17 is connected to the temperature controller 20. In this embodiment, the balance tube 5 is at room temperature, the corrosive gas chamber 3 is heated by the heating jacket 17, and the temperature of the heating jacket 17 is controlled by the temperature controller 20.

[0038] As a specific solution of this embodiment, two adjusting knobs 18 are provided at the bottom of the box 1. In this embodiment, by adjusting the adjusting knob 17 at the bottom of the instrument, the balance tube 7 is placed in a horizontal position.

[0039] As a specific solution of this embodiment, a level indicator bubble 19 is installed on the top of the box 1. In this embodiment, the level indicator bubble 18 on the top of the instrument is used to determine whether the balance tube 7 is in a horizontal position.

[0040] As a specific solution of this embodiment, the pressure sensor 4 to be detected is connected to the data acquisition instrument 21. In this embodiment, the pressure sensor 4 to be detected is connected to the data acquisition instrument 21, and the output value of the pressure sensor 4 is read in real time.

[0041] As a specific solution of this embodiment, the top of the box body 1 is open, and the top of the box body 1 is covered with an end plate, and the space enclosed by the box body 1 and the end plate is a closed space.

[0042] The device of the present invention uses an inert liquid to isolate the corrosive and inert gases, and only heats the corrosive gas chamber. First, the corrosive gas chamber is roughly filled according to a predetermined pressure value through a corrosive pressure controller, and then the air inlet valve of the corrosive gas chamber is closed. Then, the pressure of the inert gas chamber is controlled by a high-precision pressure controller, and the valve is opened to allow the inert liquid in the balance tube to move freely horizontally. The pressure balance on both sides is achieved through volume changes, and then the high temperature resistance and corrosion resistance of the high-precision pressure sensor are measured, completing environmental assessment and calibration.

[0043] The working principle and process of the device of the present invention are as follows:

[0044] The gas provided by the corrosive gas source 13 enters the corrosive gas chamber 3 after being modulated by the corrosive gas pressure controller 14, and provides the corrosive gas medium to the pressure sensor 4 to be detected; the top of the corrosive gas chamber 3 is connected to the pressure sensor 4 to be detected, and the pressure sensor 4 to be detected is connected to the data acquisition instrument 21. The gas in the corrosive gas chamber 3 is heated by the heating sleeve 6 outside the corrosive gas chamber 3, and the temperature is controlled by the temperature controller 5. The bottom of the corrosive gas chamber 3 is connected to the balance pipe 5 and a corrosive gas delivery control valve 15 is provided at the connection. The corrosive gas delivery pipeline 12 is provided with a corrosive gas control valve 8. After being modulated by the inert gas pressure controller 11, the inert gas is passed into the inert gas chamber 2 connected to the balance pipe 5 through the inert gas delivery pipeline 9 to provide a balance gas source. The bottom of the inert gas chamber 2 is connected to the balance pipe 5 and an inert gas control valve 7 is provided at the connection. The inert gas control valve 7 and the corrosive gas control valve 8 respectively control the inert gas and the corrosive gas to be on and off with the balance pipe 5.

[0045] The function of the balance tube 5 is to adjust the pressure balance on both sides of the corrosive gas chamber 3 and the inert gas chamber 2 through the free movement of the isolation liquid 6 inside. The balance tube 5 is placed horizontally and filled with isolation liquid 6 to physically isolate the inert gas and the corrosive gas to avoid the influence of the corrosive gas on the inert gas pressure controller 11. The balance tube 5 is in a horizontal position by adjusting the adjustment knob 18 at the bottom of the instrument. The balance tube 5 remains horizontal to ensure that the isolation liquid 6 moves freely in the balance tube 5 to adjust the pressure without generating a pressure difference due to the height change at both ends of the isolation liquid 6. The level indicator bubble 19 on the top of the instrument is used to determine whether the balance tube 5 is in a horizontal position. In the balancing tube 5, the corrosive gas and the inert gas are physically isolated by the isolating liquid 6. The gas path composed of the corrosive gas source 13, the corrosive gas pressure controller 14, the corrosive gas chamber 3 and the pressure sensor 4 to be detected is physically separated from the gas path composed of the inert gas source 10, the inert gas chamber 2 and the inert gas pressure controller 11. The pressure sensor 4 to be detected is in a high temperature and corrosive environment. The pressures on both sides are automatically adjusted to be equal through the free movement of the isolating liquid 6 in the balancing tube 5.

[0046] The pressure of the inert gas in equilibrium with the high-temperature corrosive gas is measured by the inert gas pressure controller 11 to assess the performance of the pressure sensor 4 to be tested in the high-temperature corrosive atmosphere. During the assessment, it is only necessary to set the inert gas pressure controller 11 and the corrosive gas pressure controller 14 and switch the inert gas control valve 7 and the corrosive gas control valve 8 to complete the pressure assessment and calibration. The specific process includes: closing the inert gas control valve 7 and the corrosive gas control valve 8, and then opening the corrosive gas delivery control valve 15, filling the corrosive gas chamber 3 and the inert gas chamber 2 with gas respectively, and then closing the corrosive gas delivery control valve 15 to avoid the influence of the continuous pressure adjustment of the corrosive gas pressure controller 14. The pressure of the filled corrosive gas is only adjusted by the horizontal movement of the inert gas pressure controller 11 and the isolation liquid 6. The inert gas pressure controller 11, as a pressure control component, makes the pressure of the corrosive gas chamber 3 reach equilibrium with the inert gas pressure, and achieves high-precision measurement. Although the accuracy of the corrosive gas pressure controller 14 is low and does not meet the requirements of high-precision pressure measurement and pressure regulation, it does not affect the test.

[0047] When conducting a high temperature test, the temperature controller 5 is turned on in advance to stabilize the temperature of the corrosive gas chamber 3 at the target value, and then the corrosive gas and the inert gas are filled, or the gas is filled first and then heated. When conducting a vacuum range test, the corrosive gas pressure controller 14 and the inert gas pressure controller 11 can be used to evacuate the chamber and then fill the chamber with the atmosphere to achieve a low-pressure and high-temperature test.

[0048] Embodiment 2:

[0049] This embodiment provides a performance testing device for a pressure sensor for a vacuum stability test of explosives. The device is basically the same as that of Embodiment 1, except that: in this embodiment, the balance tube 5 is made of a pressure-resistant stainless steel tube, and the isolation liquid 6 filled inside is tetradecahydrophenanthrene perfluorinated compound. The stainless steel tube is 2 meters long and has an inner diameter of 2 mm. There is no need to observe the position of the isolation liquid 6 through the observation window 16.

[0050] Embodiment 3:

[0051] This embodiment provides a performance test method for a pressure sensor for a vacuum stability test of explosives, and the method uses the performance test device for a pressure sensor for a vacuum stability test of explosives of embodiment 1. The method specifically comprises the following steps:

[0052] Step 1: Follow Figure 1 After the test device is connected, adjust the bottom adjustment knob 18, observe the level indicator bubble 19 to ensure that the adjustment is level, turn on the temperature controller 20 and the data acquisition instrument 21, set to 300°C, until the temperature is constant.

[0053] Step 2: Set the pressure of the corrosive pressure controller 3 and the inert gas pressure controller 11 to 0.35 MPa, close the inert gas control valve 7 and the corrosive gas control valve 8, open the corrosive gas delivery control valve 15, open the corrosive gas source 13 and the inert gas source 10, and close the corrosive gas delivery control valve 15 after the pressure is basically stable.

[0054] Step three, slowly and synchronously open the inert gas control valve 7 and the corrosive gas control valve 8, observe the position of the isolation liquid 6 through the observation window, adjust the opening size of the inert gas control valve 7 and the corrosive gas control valve 8, and ensure that the isolation liquid 6 is in the bottom balance pipe 5 until the opening of the inert gas control valve 7 and the corrosive gas delivery control valve 15 reaches the maximum.

[0055] Step 4: After the control of the inert gas pressure controller 11 is stable, the value is read through the data acquisition device 21, and the error is calculated by comparing it with the set value of the high-precision pressure controller.

[0056] In this embodiment, the final result shows that the value detected by the data acquisition instrument 21 is 350076Pa, and the set value of the high-precision pressure controller is 350000Pa, which can meet the use requirements of the pressure sensor in a high-temperature corrosive environment.

Claims

1. A performance testing device for a pressure sensor for vacuum stability testing of explosives, comprising a housing (1); characterized in that: An inert gas chamber (2) is arranged in one side of the box body (1), the inert gas chamber (2) is arranged along the vertical direction, and the top of the inert gas chamber (2) is open; A corrosive gas chamber (3) is arranged in the other side of the box body (1), the corrosive gas chamber (3) is arranged along the vertical direction, and the top of the corrosive gas chamber (3) is open; the open top of the corrosive gas chamber (3) is a sensor installation port, and the sensor installation port is used to install a pressure sensor (4) to be detected; A balance tube (5) is provided between the bottom ends of the inert gas chamber (2) and the corrosive gas chamber (3), and an isolation liquid (6) is contained in the balance tube (5), and the isolation liquid (6) is mercury or tetradecahydrophenanthrene perfluoride; The balance pipe (5) is arranged in the horizontal direction, and the lateral ends of the balance pipe (5) are respectively connected to the inert gas chamber (2) and the corrosive gas chamber (3); an inert gas control valve (7) is arranged at the connection point between the inert gas chamber (2) and the balance pipe (5), and a corrosive gas control valve (8) is arranged at the connection point between the corrosive gas chamber (3) and the balance pipe (5); The inert gas chamber (2) is provided with an air inlet, the air inlet of the inert gas chamber (2) is connected to an inert gas source (10) through an inert gas delivery pipeline (9), an inert gas pressure controller (11) is provided on the inert gas delivery pipeline (9), and the inert gas pressure controller (11) is a high-precision pressure controller; The corrosive gas chamber (3) is provided with an air inlet, and the air inlet of the corrosive gas chamber (3) is connected to a corrosive gas source (13) through a corrosive gas delivery pipeline (12), and a corrosive gas pressure controller (14) and a corrosive gas delivery control valve (15) are provided on the corrosive gas delivery pipeline (12).

2. The performance testing device of the pressure sensor for the vacuum stability test of explosives as claimed in claim 1, characterized in that: The balance tube (5) is made of high borosilicate glass or stainless steel.

3. The performance testing device of the pressure sensor for the vacuum stability test of explosives as claimed in claim 1, characterized in that: The front side of the box body (1) is provided with an observation window (16), and the observation window (16) is opposite to the balance pipe (5).

4. The performance testing device of the pressure sensor for the vacuum stability test of explosives as claimed in claim 1, characterized in that: The outer side of the top of the corrosive gas chamber (3) is provided with a heating jacket (17), and the heating jacket (17) is connected to a temperature controller (20).

5. The performance testing device of the pressure sensor for the vacuum stability test of explosives as claimed in claim 1, characterized in that: An adjusting knob (18) is provided at the bottom of the box body (1).

6. The performance testing device of the pressure sensor for the vacuum stability test of explosives as claimed in claim 1, characterized in that: A level indicator bubble (19) is installed on the top of the box (1).

7. The performance testing device of the pressure sensor for the vacuum stability test of explosives as claimed in claim 1, characterized in that: The pressure sensor (4) to be detected is connected to a data acquisition device (21).

8. A performance testing method for a pressure sensor for a vacuum stability test of explosives, characterized in that: The method adopts the performance testing device of the pressure sensor for vacuum stability test of explosives as claimed in any one of claims 1 to 7.

9. The performance testing method of the pressure sensor for the vacuum stability test of explosives as claimed in claim 8, characterized in that: The method comprises the following steps: Step 1: After the performance test device of the pressure sensor for the vacuum stability test of explosives is connected, adjust the bottom adjustment knob (18), observe the level indicator bubble (19), ensure the adjustment level, turn on the temperature controller (20) and the data acquisition instrument (21), set the target temperature, and keep the temperature constant; Step 2: setting the pressure target values ​​of the corrosive pressure controller (3) and the inert gas pressure controller (11) to be the same, closing the inert gas control valve (7) and the corrosive gas control valve (8), opening the corrosive gas delivery control valve (15), opening the corrosive gas source (13) and the inert gas source (10), and closing the corrosive gas delivery control valve (15) after the pressure is basically stable; Step 3, slowly and synchronously open the inert gas control valve (7) and the corrosive gas control valve (8), observe the position of the isolation liquid (6) through the observation window, adjust the opening of the inert gas control valve (7) and the corrosive gas control valve (8), ensure that the isolation liquid (6) is in the bottom balance pipe (5), until the opening of the inert gas control valve (7) and the corrosive gas delivery control valve (15) reaches the maximum; Step 4: After the inert gas pressure controller (11) is stabilized, the value is read through the data acquisition device (21), and the error is calculated by comparing it with the set value of the high-precision pressure controller.

10. The performance testing method of the pressure sensor for the vacuum stability test of explosives as claimed in claim 9, characterized in that: The target temperature is 25 to 350° C., and the target pressure values ​​of the corrosive pressure controller (3) and the inert gas pressure controller (11) are 0.1 to 10 MPa.

Images