An electronic detonator sealing test tube under temperature and pressure coupling condition and a sealing performance detection test method

Abstract

The application discloses a kind of electronic detonator sealing test tubes under the condition of temperature and pressure coupling and sealing performance detection test method, its method includes the following steps: a certain amount of chemical reagent is loaded in empty tube shell, to ensure that the gas production after thermal decomposition reaches target pressure by internal pressure;Power positive line, negative line and signal line are welded on PCB board, then loaded into empty tube shell, injection plug card is blocked to empty tube shell, to obtain test tube;Power positive line and negative line are connected with power supply, and signal line and negative line are connected with signal amplifier and oscilloscope;Test tube is placed in high-low temperature chamber, heated to decomposition temperature, observe the internal pressure change of test tube, keep high temperature until target pressure is reached;Lower to preset low temperature, record pressure change curve and analyze.The application considers the influence of environmental temperature change on the sealing performance of electronic detonator, realizes real-time quantitative analysis of sealing performance, effectively improves the test efficiency of electronic detonator sealing performance detection.

Description

Technical Field

[0001] This invention relates to the technical field of electronic detonator performance testing, and in particular to an electronic detonator sealing test tube under temperature-pressure coupling conditions and a test method for testing sealing performance. Background Technology

[0002] Many current blasting scenarios place high demands on the sealing performance of electronic detonators. For example, in underwater blasting, electronic detonators must have good sealing performance while withstanding water pressure to prevent water from entering the casing and causing short circuits. In high-altitude and cold-climate open-pit mine blasting, when electronic detonators face both low-temperature environments and internal and external pressure differences, it is essential to ensure that the injection-molded plug does not fail to seal due to excessive contraction at low temperatures, so that the negative pressure environment does not affect the ignition reliability of the agent.

[0003] To test the sealing performance of electronic detonators, manufacturers typically conduct immersion tests, which involve placing the electronic detonator in a sealed, pressurized water tank, removing it after a period of time, and then testing whether it can communicate and detonate normally.

[0004] However, the above testing methods have certain limitations. On the one hand, they cannot simulate low-temperature environments and cannot guarantee the sealing reliability of electronic detonators in low-temperature environments; on the other hand, they cannot monitor the sealing status of electronic detonators in real time, and the test cycle is often long. Summary of the Invention

[0005] The technical problem to be solved by this invention is to provide a test method for detecting the sealing performance of electronic detonators under temperature-pressure coupling conditions. This method can perform real-time quantitative analysis of the sealing performance of electronic detonators under temperature-pressure coupling conditions, and can be used to explore the influence of ambient temperature changes on the sealing performance of electronic detonators. Compared with the traditional water pressure test method, this method effectively improves the test efficiency of electronic detonator sealing performance detection. This method also allows for the real-time monitoring of the internal pressure of the test tube by immersing a test tube containing high-pressure gas in different media environments, and can also be used to explore the influence of different media environments on the sealing performance of electronic detonators.

[0006] To solve the above-mentioned technical problems, in a first aspect, the electronic detonator sealing test tube under temperature-pressure coupling conditions provided by the present invention adopts the following technical solution: An electronic detonator sealing test tube under temperature-pressure coupling conditions includes an empty tube shell, a pressure measurement module disposed inside the empty tube shell, and a custom lead wire disposed at the opening of the empty tube shell. The custom lead wire includes a plastic plug sealing the opening of the empty tube shell and a wire passing through and fixed to the plastic plug. The wire is connected to the signal transmission end of the pressure measurement module, with one end of the wire located inside the empty tube shell and the other end located outside the empty tube shell. The empty tube shell is filled with a chemical reagent that can undergo thermal decomposition and produce gas.

[0007] By employing the above technical solution, an empty tube filled with chemical reagents is placed in a high-temperature environment. The chemical reagents undergo thermal decomposition and produce gas, increasing the pressure inside the empty tube. Furthermore, by controlling the amount of chemical reagent added, the pressure difference between the inside and outside of the test tube can be controlled, thus simulating the pressure difference at different water depths or borehole depths. After complete thermal decomposition of the chemical reagents, the test tube is placed in a temperature-adjustable environment or a specified medium environment for sealing testing. Information such as whether the gas pressure inside the test tube decreases, at what temperature it begins to decrease, and the rate of decrease allows for analysis and testing of the sealing performance of the electronic detonator, without the need for immersion in a specified medium environment or a lengthy testing process. Because immersion in a specified medium environment is not required, the impact of sub-zero temperatures on the sealing performance of the electronic detonator can also be tested and analyzed. Moreover, the gas pressure measurement module built into the empty tube shell monitors the sealing condition in real time, enabling real-time quantitative analysis of the electronic detonator's sealing performance within a short test cycle.

[0008] Optionally, the chemical reagent can undergo thermal decomposition and produce gas between 50°C and 85°C.

[0009] By adopting the above technical solution, the thermal decomposition temperature range of chemical reagents that undergo thermal decomposition between 50℃ and 85℃ will not adversely affect the electronic components inside the test tube, thereby ensuring the accuracy and validity of subsequent test results.

[0010] Optionally, the chemical reagent is non-explosive and its thermal decomposition does not produce highly toxic gases.

[0011] Optionally, the air pressure measurement module includes a PCB board, an air pressure sensor, and peripheral devices. The air pressure sensor and peripheral devices are both mounted on the PCB board, which is placed inside the empty tube shell.

[0012] By adopting the above technical solution, the PCB board is used to depict the circuit and carry the components; the barometric pressure sensor is used to sense the barometric pressure signal and to collect, process and output the signal through the built-in chip and high-precision IC; the peripheral devices are supporting devices for the barometric pressure sensor and are used to assist the barometric pressure sensor in collecting and transmitting signals.

[0013] Optionally, the wire body contains three core wires, two of which are positive and negative power supply wires, and the other is a signal wire. The positive, negative, and signal wires are all connected to the PCB board. The positive and negative power supply wires are connected to a programmable digital power supply, and the signal and negative power supply wires are connected to a signal amplifier. The signal amplifier is connected to an oscilloscope. The materials of the positive, negative, and signal wires, as well as the outer layer material and injection molding plug material of the wire body, are the same as those used in existing electronic detonator lead wires.

[0014] By adopting the above technical solution, a programmable digital power supply is used to provide a stable DC voltage to the barometric pressure measurement module, and the power supply voltage value meets the requirements of the barometric pressure sensor; a signal amplifier is used to amplify the barometric pressure signal output by the barometric pressure sensor, reduce noise interference, and facilitate signal reading; an oscilloscope is used to display and record data. Compared with the lead wires of existing electronic detonators, the lead wire of this application has only one more core wire, and the other materials are exactly the same. This ensures that the sealing performance of the test tube itself is not changed compared with that of conventional electronic detonators.

[0015] Secondly, the test method for detecting the sealing performance of an electronic detonator under temperature-pressure coupling conditions provided by the present invention adopts the following technical solution: A method for testing the sealing performance of an electronic detonator under temperature-pressure coupling conditions, comprising the following steps: S1. A certain amount of chemical reagent is loaded into the empty shell of the electronic detonator sealing test tube as described in any one of claims 1-5. The mass of the chemical reagent is calculated to ensure that the amount of gas generated after the thermal decomposition of the chemical reagent is sufficient to make the internal pressure of the sealed empty tube reach the target pressure. S2. Solder the positive power line, negative power line and signal line to the PCB board, then put them into the empty tube shell filled with chemical reagents, and assemble the injection-molded plug bayonet at the opening of the empty tube shell to seal the tube opening, thus obtaining the electronic detonator sealed test tube. S3. Connect the positive power line and negative power line of the line to the programmable digital power supply, and connect the signal line and negative power line to the signal amplifier, and then connect the signal amplifier to the oscilloscope. S4. Place the electronic detonator sealing test tube into a high and low temperature chamber and heat it to the decomposition temperature of the chemical agent. At the same time, observe the pressure change inside the empty tube shell using an oscilloscope. Maintain the high temperature for a period of time until the internal pressure of the electronic detonator sealing test tube reaches the target pressure. S5. Gradually reduce the temperature of the high and low temperature chamber to the preset low temperature, and record and analyze the gas pressure change curve inside the electronic detonator sealing test tube during the process.

[0016] By adopting the above technical solution, the influence of ambient temperature changes on the sealing performance of electronic detonators can be fully considered through temperature variations within the high and low temperature chamber. When the preset low temperature is above zero, the internal and external pressure differences of the electronic detonator at different water depths or borehole depths can be simulated. When the preset low temperature is below zero, the low temperature and negative pressure environments of the electronic detonator in different high-altitude plateau regions can be simulated, allowing for the exploration of the sealing performance of electronic detonators in more application scenarios. Furthermore, the air pressure measurement module enables real-time quantitative analysis of the sealing performance of electronic detonators, effectively improving the experimental efficiency of electronic detonator sealing performance testing.

[0017] The above testing methods can be applied to some experimental investigations in the design stage of electronic detonators, such as the screening of injection plug materials and structures. The above testing methods can quickly analyze and investigate the adaptability of electronic detonators made of each injection plug material in different temperature and medium environments, so as to select and design suitable injection plug materials and structures, and assist in the research and development of electronic detonators with more ideal sealing performance.

[0018] Optionally, the mass of the chemical reagent can be calculated as follows: S1. Determine the gas production per unit mass: X ml / g based on the thermal decomposition reaction equation of the selected chemical reagent at the preset temperature; S2. According to the ideal gas law: PV=nRT, calculate the number of gas moles n required to raise the internal pressure of the empty tube shell (5) from 0.1MPa to the target pressure under low temperature conditions, where P is 1 atmosphere + the internal and external pressure difference at a specified water depth or 1 atmosphere + the negative pressure at a specified altitude plateau, R is the molar gas constant, T is the thermodynamic temperature, and V is the volume of the internal space of the empty tube shell (5); S3. Calculate the required gas volume based on the required number of moles of gas: V1 = 22.4n; S4. Calculate the required mass of chemical reagents based on the required gas volume: m = V1 / X.

[0019] By adopting the above technical solution and according to the above formula, the required mass of chemical reagents can be accurately calculated based on the target pressure.

[0020] Optionally, the temperature setting range of the high and low temperature chamber is -40℃ to 85℃.

[0021] By adopting the above technical solution, the temperature range can cover the upper limit of the thermal decomposition temperature of chemical reagents and the lower limit of the temperature environment where electronic detonators are located.

[0022] Optionally, after placing the electronic detonator sealing test tube into a high and low temperature chamber, first raise the temperature to the decomposition temperature of the chemical reagent at a set rate and hold it for 8-12 minutes, then lower it to the preset low temperature at a set rate.

[0023] Optionally, after placing the electronic detonator sealing test tube into a high and low temperature chamber, the temperature is first increased to the decomposition temperature of the chemical reagent at a rate of 8-12℃ / min and held for 8-12min, and then decreased to the preset low temperature at a rate of 8-12℃ / min.

[0024] By adopting the above technical solution, heating at the above rate and maintaining it for a certain time can fully thermally decompose the chemical reagents, and cooling at the above rate can more accurately and effectively record the gas pressure change curve inside the empty tube shell.

[0025] Optionally, step S5 can also be replaced by: The electronic detonator sealing test tube is placed in a high and low temperature test chamber and heated to the decomposition temperature of the chemical reagent. After all the internal chemical reagents are decomposed and the gas pressure reaches its peak, the test chamber temperature is reduced to room temperature. Remove the electronic detonator sealing test tube from the test chamber and place it in the solution tank, ensuring the test tube is completely submerged in the solution. Set the soaking time according to application requirements, and record the internal air pressure changes during this period. After the target soaking time is reached, observe the air pressure change curve and determine whether and when the test tube has experienced sealing failure based on the rate of air pressure change.

[0026] Because the materials of electronic detonators, such as the injection-molded plug, wire, and empty shell, may undergo physical property changes in environments such as water, diesel, and ammonium nitrate solution, their sealing performance may also change. By employing the aforementioned internal air pressure testing method for electronic detonators, after the air pressure in the test tube reaches the target air pressure, the test tube is placed in a solution tank to test the sealing performance of the electronic detonator in different media (liquid) environments.

[0027] Optionally, the analysis method in step S5 is as follows: combine the temperature-time change curve of the high and low temperature chamber with the pressure-time change curve inside the empty tube shell, analyze the temperature and pressure at the initial pressure drop point, the average pressure drop rate at different stages, and the temperature and pressure range at that stage, and then evaluate the sealing performance of the electronic detonator under specific conditions.

[0028] In summary, the present invention has at least one of the following beneficial technical effects: 1. The test tube filled with chemical reagents is placed in a high-temperature environment. After the chemical reagents undergo complete thermal decomposition, the internal and external pressure difference of the electronic detonator is simulated at different water depths, different borehole depths, or in high-altitude environments. The test tube is then placed in a temperature-adjustable environment to test its sealing performance. By analyzing information such as whether the air pressure inside the test tube drops, at what temperature it begins to drop, and the rate of drop, the sealing performance of the electronic detonator can be analyzed and tested. It does not require immersion in a specified medium environment or a long testing process. Moreover, the sealing performance can be monitored in real time through the air pressure measurement module built into the empty tube shell, and the sealing performance of the electronic detonator can be quantitatively analyzed in real time. 2. The above-mentioned test tube and test method, under temperature and pressure coupling conditions, can fully consider the influence of ambient temperature changes on the sealing performance of electronic detonators, realize real-time quantitative analysis of sealing performance, and can quickly detect and analyze the influence of temperature on the sealing performance of electronic detonators, effectively improving the test efficiency of electronic detonator sealing performance testing. 3. The materials used in electronic detonators, such as the injection-molded plug, wire, and empty shell, may undergo physical property changes in environments containing water, diesel fuel, or ammonium nitrate solution, leading to variations in sealing performance. Based on the aforementioned internal pressure testing method for electronic detonators, by immersing the test tube in different media environments, the impact of different media environments on the sealing performance of electronic detonators can be examined under temperature and pressure coupling conditions. Simultaneously, real-time quantitative analysis of sealing performance can also be achieved. Attached Figure Description

[0029] Figure 1 This is a schematic diagram of the structure of the electronic detonator sealing test tube under temperature-pressure coupling conditions, as demonstrated by the present invention.

[0030] Figure 2 This invention is a schematic diagram illustrating the signal connection between the test tube and the power supply, signal amplifier, and oscilloscope.

[0031] Figure 3 This is a flowchart illustrating the test method for testing the sealing performance of electronic detonators under temperature-pressure coupling conditions.

[0032] Explanation of reference numerals in the attached diagram: 1. Line body; 2. Injection plug; 3. Pressure sensor; 4. PCB board; 5. Empty tube shell; 6. Chemical reagent; 7. Peripheral components. Detailed Implementation

[0033] The following is in conjunction with the appendix Figure 1-3 The present invention will be described in further detail below.

[0034] Example 1: This invention discloses a sealing test tube for an electronic detonator under thermo-pressure coupling conditions. (Refer to...) Figure 1The electronic detonator sealing test tube under temperature and pressure coupling conditions includes an empty tube shell 5, a pressure measurement module installed in the empty tube shell 5, and a custom lead wire. The custom lead wire has a structure that is basically the same as that of a regular electronic detonator lead wire. The custom lead wire includes an injection-molded plug 2 and a wire body 1. The injection-molded plug 2 is fitted into the opening of the empty tube shell 5 with an interference fit to the inner wall of the empty tube shell 5 to seal the opening of the empty tube shell 5. The wire body 1 passes through and is fixed to the injection-molded plug 2, with one end of the wire body 1 located inside the empty tube shell 5 and the other end located outside the empty tube shell 5.

[0035] Reference Figure 1 The air pressure measurement module includes a PCB board 4, an air pressure sensor 3, and peripheral components 7. The PCB board 4 is used to depict circuits and support components; in this embodiment, the PCB board 4 is a commercially available product. The air pressure sensor 3 is used to sense air pressure signals and collects, processes, and outputs the signals through a built-in chip and a high-precision IC; in this embodiment, a TKUN series pressure sensor is used. The peripheral components 7 include capacitors, resistors, etc., used to assist the air pressure sensor 3 in acquiring and transmitting signals; in this embodiment, the peripheral components 7 are conventional existing products that are used in conjunction with the TKUN series pressure sensor. The overall size of the air pressure measurement module is similar to that of the electronic control module in an electronic detonator, and it can be directly inserted into the empty tube shell 5. The wire 1 is connected to the PCB board 4 by soldering.

[0036] Reference Figure 1 and Figure 2 Line 1 consists of multiple strands of wire. Line 1 transmits power to the barometric pressure measurement module and outputs signals. Line 1 contains three strands of wire: two are the positive and negative power supply wires, and the third is the signal wire. The positive, negative, and signal wires are all connected to PCB board 4. The positive and negative power supply wires are simultaneously connected to a programmable digital power supply, and the signal and negative power supply wires are simultaneously connected to a signal amplifier, which is connected to an oscilloscope. The materials of the positive, negative, and signal wires, as well as the outer layer material and injection molding plug material of the line, are the same as those used in conventional electronic detonator lead wires.

[0037] A programmable digital power supply provides a stable DC voltage to the pressure measurement module, with the supply voltage value meeting the requirements of the pressure sensor. A signal amplifier amplifies the pressure signal output by the pressure sensor, reducing noise interference and facilitating signal reading. An oscilloscope displays and records data. Compared to existing electronic detonator leads, the lead wire in this application has only one additional core wire; all other materials are identical. This ensures that the sealing performance of the test tube itself remains unchanged compared to conventional electronic detonators.

[0038] Reference Figure 1The empty tube shell 5 contains a chemical reagent 6, which undergoes thermal decomposition and produces gas. The chemical reagent 6 can undergo thermal decomposition and produce gas between 50°C and 85°C. The chemical reagent 6 is non-explosive and does not produce highly toxic gas during thermal decomposition. In this embodiment, the chemical reagent 6 is ammonium bicarbonate. The thermal decomposition temperature range of the chemical reagent 6 (50°C to 85°C) will not adversely affect the internal electronic components of the test tube, thus ensuring the accuracy and validity of subsequent test results.

[0039] This invention discloses a test method for detecting the sealing performance of an electronic detonator under temperature-pressure coupling conditions. (Refer to...) Figure 3 A method for testing the sealing performance of an electronic detonator under temperature-pressure coupling conditions, comprising the following steps: First, the internal pressure of the empty tube shell 5 is set according to the pressure environment faced by the electronic detonator in the actual application scenario. In this embodiment, it is set that in a blasting at a depth of 60m, the pressure difference between the inside and outside of the electronic detonator at a depth of 60m is 6 atmospheres. Therefore, during the testing process, the internal pressure of the detonator can be set to 7 atmospheres, which is 6 atmospheres different from the outside pressure.

[0040] To achieve the aforementioned pressure conditions, ammonium bicarbonate needs to be added inside the detonator. The mass of reagent required to reach 7 atmospheres inside the empty detonator shell 5 at -40℃ is calculated based on the thermal decomposition equation of ammonium bicarbonate. The specific calculation method is as follows: S1. Determine the gas production per unit mass: X ml / g based on the thermal decomposition reaction equation of the selected chemical reagent 6 at the preset temperature; S2. According to the ideal gas law: PV=nRT, calculate the number of gas moles n required to raise the internal pressure of the empty tube shell 5 from 0.1MPa to the target pressure under low temperature conditions, where P is 1 atmosphere + the internal and external pressure difference at a specified water depth (P is 7 atmospheres in this embodiment), R is the molar gas constant, and T is the thermodynamic temperature. S3. Calculate the required gas volume based on the required number of moles of gas: V1 = 22.4n; S4. Calculate the required mass of chemical reagent 6 based on the required gas volume: m = V1 / X.

[0041] Then, based on the calculated mass, weigh the reagent using an analytical balance, and pour the weighed reagent into the empty tube shell 5.

[0042] The positive power line, negative power line, and signal line are all soldered to the PCB board 4, and then inserted into the empty tube shell 5 filled with chemical reagent 6. The injection-molded plug 2 is then fitted into the opening of the empty tube shell 5 to seal the opening of the empty tube shell 5, thus obtaining the electronic detonator sealed test tube.

[0043] Connect the positive and negative power supply lines of line 1 to the programmable digital power supply, and connect the signal line and the negative power supply line to the signal amplifier. Then connect the signal amplifier to an oscilloscope and observe and record the air pressure changes inside the test tube using the oscilloscope.

[0044] After the above circuit connections are completed, place the test tube into the high and low temperature chamber and set the heating and cooling programs for the chamber: first heat up to 85°C at a rate of 10°C / min and hold for 10 minutes, then cool down to -40°C at a rate of 10°C / min. Then start executing the heating and cooling programs, and simultaneously use an oscilloscope to acquire the amplified air pressure signal at a certain sampling rate.

[0045] After the temperature program is completed, the pressure change curve in the oscilloscope and the temperature change curve in the high and low temperature chamber are saved and analyzed to evaluate the sealing performance of the electronic detonator.

[0046] Example 2: Because the materials of the electronic detonator, such as the injection plug 2, the wire 1, and the empty tube shell 5, may undergo physical property changes in environments such as water, diesel, and ammonium nitrate solution, the sealing performance may change.

[0047] This invention discloses an electronic detonator sealing test tube under temperature-pressure coupling conditions and a test method for sealing performance testing, which differs from Embodiment 1 in that: when Figure 2 After the test tube shown is made, connect the test tube to the programmable digital power supply and signal amplifier, and then place the test tube in a high and low temperature test chamber and heat it to 85°C. After the internal chemical reagent 6 is completely decomposed and the gas pressure reaches its peak, reduce the temperature of the test chamber to 25°C.

[0048] Remove the test tube from the test chamber and place it in a solution tank (the solution can be water, diesel, ammonium nitrate solution, etc.). In this embodiment, the solution is water, ensuring the test tube is completely submerged. Then, set the soaking time according to application requirements, and monitor the internal air pressure changes of the test tube using an oscilloscope during this period.

[0049] After the soaking time reaches the target number of days, check the air pressure change curve in the oscilloscope, and determine whether the test tube has experienced a sealing failure and when the sealing failure occurs based on the rate of air pressure change.

[0050] The above are all preferred embodiments of the present invention and are not intended to limit the scope of protection of the present invention. Therefore, all equivalent changes made in accordance with the structure, shape and principle of the present invention should be covered within the scope of protection of the present invention.

Claims

1. A sealing test tube for an electronic detonator under thermo-pressure coupling conditions, characterized in that: The device includes an empty tube shell (5), a pressure measuring module disposed inside the empty tube shell (5), and a custom lead wire disposed at the opening of the empty tube shell (5). The custom lead wire includes an injection plug (2) that seals the opening of the empty tube shell (5) and a wire (1) that passes through and is fixed to the injection plug (2). One end of the wire (1) is located inside the empty tube shell (5) and the other end is located outside the empty tube shell (5). The wire (1) is connected to the signal transmission end of the pressure measuring module. The empty tube shell (5) is filled with a chemical reagent (6), which can undergo thermal decomposition and produce gas.

2. The electronic detonator sealing test tube under temperature-pressure coupling conditions according to claim 1, characterized in that: The chemical reagent (6) is capable of thermal decomposition and gas production between 50°C and 85°C.

3. The electronic detonator sealing test tube under temperature-pressure coupling conditions according to claim 1, characterized in that: The chemical reagent (6) is non-explosive and does not produce highly toxic gases when thermally decomposed.

4. The electronic detonator sealing test tube under temperature-pressure coupling conditions according to claim 1, characterized in that: The air pressure measurement module includes a PCB board (4), an air pressure sensor (3), and peripheral devices (7). The air pressure sensor (3) and peripheral devices (7) are both mounted on the PCB board (4), which is placed inside the empty tube shell (5).

5. The electronic detonator sealing test tube under temperature-pressure coupling conditions according to claim 1, characterized in that: The core wire in the line body (1) is three, two of which are the positive power line and the negative power line, and the other core wire is the signal line; the positive power line, the negative power line and the signal line are all connected to the PCB board (4), the positive power line and the negative power line are simultaneously connected to a programmable digital power supply, the signal line and the negative power line are simultaneously connected to a signal amplifier, and the signal amplifier is connected to an oscilloscope.

6. A test method for detecting the sealing performance of an electronic detonator under thermo-pressure coupling conditions, characterized in that, Includes the following steps: S1. A certain amount of chemical reagent (6) is placed inside the empty shell (5) of the electronic detonator sealing test tube as described in any one of claims 1-5. The mass of the chemical reagent (6) is calculated to ensure that the amount of gas generated after the thermal decomposition of the chemical reagent (6) is such that the internal pressure of the sealed empty tube shell (5) reaches the target pressure. S2. The positive power line, negative power line and signal line are all soldered to the PCB board (4), and then inserted into the empty tube shell (5) filled with chemical reagent (6). The injection plug (2) is then fitted into the opening of the empty tube shell (5) to seal the opening of the empty tube shell (5) and an electronic detonator sealing test tube is obtained. S3. Connect the positive power line and negative power line of the line body (1) to the programmable digital power supply, and connect the signal line and negative power line to the signal amplifier, and then connect the signal amplifier to the oscilloscope. S4. Place the electronic detonator sealing test tube into a high and low temperature chamber and heat it to the decomposition temperature of the chemical agent (6). At the same time, observe the pressure change inside the empty tube shell (5) with an oscilloscope. Maintain the high temperature for a period of time until the internal pressure of the electronic detonator sealing test tube reaches the target pressure. S5. Gradually reduce the temperature of the high and low temperature chamber to the preset low temperature, and record and analyze the gas pressure change curve inside the electronic detonator sealing test tube during the process.

7. The test method for detecting the sealing performance of an electronic detonator under temperature-pressure coupling conditions according to claim 6, characterized in that, The method for calculating the mass of the chemical reagent (6) is as follows: S1. Determine the gas production per unit mass: X ml / g based on the thermal decomposition reaction equation of the selected chemical reagent (6) at the preset temperature; S2. According to the ideal gas law: PV=nRT, calculate the number of gas moles n required to raise the internal pressure of the empty tube shell (5) from 0.1Mpa to the target pressure under low temperature conditions, where P is 1 atmosphere + the internal and external pressure difference at a specified water depth or 1 atmosphere + the negative pressure at a specified altitude plateau, R is the molar gas constant, T is the thermodynamic temperature, and V is the volume of the internal space of the empty tube shell (5). S3. Calculate the required gas volume based on the required number of moles of gas: V1 = 22.4n; S4. Calculate the mass of the required chemical reagent (6) based on the required gas volume: m = V1 / X.

8. The method for testing the sealing performance of an electronic detonator under thermo-pressure coupling conditions according to claim 6, characterized in that: The temperature setting range of the high and low temperature chamber is -40℃ to 85℃.

9. The test method for detecting the sealing performance of an electronic detonator under thermo-pressure coupling conditions according to claim 8, characterized in that: After placing the electronic detonator sealing test tube into the high and low temperature chamber, first raise the temperature to the decomposition temperature of the chemical reagent (6) at a set rate and hold it for 8-12 minutes, then lower it to the preset low temperature at a set rate.

10. The test method for detecting the sealing performance of an electronic detonator under thermo-pressure coupling conditions according to claim 6, characterized in that, Step S5 can also be replaced by: The electronic detonator sealing test tube was placed in a high and low temperature test chamber and heated to the decomposition temperature of the chemical reagent (6). After the internal chemical reagent (6) was completely decomposed and the gas pressure reached its peak value, the test chamber temperature was reduced to room temperature. Remove the electronic detonator sealing test tube from the test chamber and place it in the solution tank, ensuring the test tube is completely submerged in the solution. Set the soaking time according to application requirements, and record the internal air pressure changes during this period. After the target soaking time is reached, observe the air pressure change curve and determine whether and when the test tube has experienced sealing failure based on the rate of air pressure change.

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