A mine-use explosion-proof and intrinsically safe high-voltage frequency conversion comprehensive test system

Abstract

The present invention discloses a comprehensive test system for explosion-proof and intrinsically safe high-voltage frequency conversion for mining, which relates to the field of mining safety and high-voltage frequency conversion technology, including an explosion-proof performance test module, an intrinsic safety performance test module, a high-voltage frequency conversion performance test module, a comprehensive analysis module and a report generation module. It is used to solve the problems of backward detection equipment and technology, imperfect detection system, lack of in-depth analysis of detection results, etc. in the existing comprehensive test system for explosion-proof and intrinsically safe high-voltage frequency conversion for mining; the present invention determines various parameters of the explosion-proof and intrinsically safe high-voltage frequency conversion equipment to be tested through sensors, static pressure tests, internal ignition without explosion transmission tests, dielectric tests, thermal performance tests, short circuit and overload tests, acceleration and deceleration time adjustment tests, forward and reverse tests and speed stability tests, and generates a test result report and a calculation book, which intuitively reflects the performance of the explosion-proof and intrinsically safe high-voltage frequency conversion equipment for mining in various tests.

Description

Technical Field

[0001] The invention relates to the technical field of mine electromechanical equipment, in particular to a mine flameproof and intrinsically safe high-voltage frequency conversion comprehensive testing system. Background Art

[0002] Mining electromechanical equipment refers to the general term for various mechanical and electrical equipment used in mining production. These equipment are mainly used in mining, ore dressing, transportation and many related work links, and are important tools for mining production. In order to ensure the safety of personnel and the smooth progress of production, mining electromechanical equipment has taken a series of technical measures to ensure the safe operation of electromechanical equipment by standardizing the design, manufacture, installation, use and maintenance of electromechanical equipment. Flameproof electromechanical equipment and intrinsically safe electromechanical equipment are two widely used mining electromechanical equipment. Flameproof electromechanical equipment is also called flameproof enclosure type equipment. The main purpose of its design is to prevent possible explosions inside the equipment from being transmitted to the outside of the equipment, thereby avoiding causing explosions in the surrounding environment. This type of equipment usually has a sturdy casing that can withstand the pressure generated by the internal explosion and ensure that the explosion flame or explosion products will not escape through the joint surface or structural gap of the equipment, thereby causing a larger explosion. Flameproof electromechanical equipment is widely used in the petroleum, chemical, coal and other industries, especially in places where flammable and explosive substances need to be handled.

[0003] Intrinsically safe electromechanical equipment, also known as intrinsically safe equipment, is designed to limit the energy in the circuit so that under normal operation and specified fault conditions, even if sparks or thermal effects are generated, they are not enough to ignite the explosive mixture; this type of equipment usually has the characteristics of low voltage, low current and low power, and its circuit parameters and structural design are strictly calculated and tested to ensure its safety; intrinsically safe electromechanical equipment is widely used in various flammable and explosive hazardous places, such as petrochemical, medicine, coal mines, etc., with reliable safety performance, which can effectively prevent gas explosions and fires; mining electromechanical equipment testing plays a vital role in ensuring safe production in mines, but there are still some shortcomings in actual operation, including backward testing equipment and technology, imperfect testing system, lack of in-depth analysis of test results, etc. Therefore, it is necessary to design a mining explosion-proof and intrinsically safe high-voltage frequency conversion comprehensive test system to solve the above technical problems. Summary of the invention

[0004] In order to overcome the shortcomings of the background technology, the embodiment of the present invention provides a mining explosion-proof and intrinsically safe high-voltage frequency conversion comprehensive testing system, which can effectively solve the problems involved in the above-mentioned background technology.

[0005] The purpose of the present invention can be achieved through the following technical solutions:

[0006] A mine-used flameproof and intrinsically safe high-voltage frequency conversion comprehensive test system comprises a flameproof performance test module, an intrinsically safe performance test module, a high-voltage frequency conversion performance test module, a comprehensive analysis module and a report generation module.

[0007] The explosion-proof performance test module determines the explosion-proof index and explosion-proof index through sensors and static pressure tests. The specific process is as follows:

[0008] Open the flameproof box of the mine-used flameproof and intrinsically safe high-voltage frequency conversion equipment to be tested, use a laser displacement sensor to scan the outer surface of the flameproof box and obtain the flatness, count the flatness of all surfaces and record it as the flatness index E1, use a laser displacement sensor to scan the welding surface of the flameproof box and obtain the flatness, which is recorded as the weld index E2; use an ultrasonic flaw detector to emit ultrasonic waves to the entire flameproof box, analyze the reflection intensity and time of the sound waves to obtain the number of bubbles and cracks inside the flameproof box and record it as the flaw detection index E3; thoroughly remove the anti-rust oil on the flameproof surface of the flameproof box, ensure that the rubber rings, plugging plates, gaskets and other components of the flameproof box have been fully installed and close the flameproof box. Then, air is injected into the box through an air pump, and the air outlet pipe of the air pump is connected to the air inlet of the explosion-proof box. The air pump is adjusted to make the air pressure in the box reach the preset pressure, and the air outlet flow rate e1 of the air pump is recorded. After maintaining the preset air pressure for a preset time, the laser displacement sensor is used to scan the outer surface of the explosion-proof box and obtain the flatness parameter e2 of the surface, and the air outlet flow rate e3 of the air pump at this time is recorded. The formula Calculate the reliability index E4, where k1 and k2 are preset weight factors, by the formula Calculate explosion protection index ,in , , and The air in the explosion-proof box is pumped out to return the air pressure inside the box to a standard atmospheric pressure, and anti-rust oil is applied to the surface of the explosion-proof surface.

[0009] As a preferred embodiment of the present invention, the explosion-proof performance test module determines the explosion-proof parameters through an internal ignition non-explosion transmission test, and the specific process is as follows:

[0010] Place the tested explosion-proof and intrinsically safe high-voltage frequency conversion equipment for mining on a test bench in a professional laboratory environment, and inject a mixed gas of preset concentration and preset combustibles into the explosion-proof box of the explosion-proof and intrinsically safe high-voltage frequency conversion equipment for mining through a pressure valve. Use a spark plug to ignite the mixed gas inside the explosion-proof box. Obtain the temperature parameter t and pressure parameter p in the environment through the pressure sensor and temperature sensor outside the explosion-proof box, and then use a laser displacement sensor to scan the outer surface of the explosion-proof box and obtain the flatness parameter e4 of the surface. Use the formula Calculation of explosion-proof index ,in , and is the preset weight factor; t0 is the preset standard temperature, and p0 is the preset standard air pressure.

[0011] As a preferred embodiment of the present invention, the intrinsic safety performance test module determines the intrinsic safety performance index through dielectric testing, thermal performance testing, and short circuit and overload testing, specifically:

[0012] Connect the circuit of the tested mining flameproof and intrinsically safe high-voltage frequency conversion equipment to the high-voltage generator, output the preset voltage through the high-voltage generator, and maintain the preset time, and use the electric field sensor to record the number of breakdown and flashover phenomena N and leakage current I generated by the tested mining flameproof and intrinsically safe high-voltage frequency conversion equipment within the preset time. Calculate the dielectric index E5, where K3 is a preset weight factor;

[0013] Adjust the voltage in the high-voltage generator to the working voltage of the flameproof and intrinsically safe high-voltage frequency conversion equipment for mining to be tested, and after maintaining the working voltage for a preset time, obtain the temperature monitoring data of the flameproof and intrinsically safe high-voltage frequency conversion equipment for mining to be tested through the temperature sensor, including the heat sink temperature t1, the inner cavity temperature t2, the inner cavity wire temperature t3, the explosion-proof box shell temperature t4, the capacitor temperature t5, the terminal temperature t6 and the transformer winding temperature t7. Through the formula Calculate the temperature change index E6, where i is the temperature monitoring data number, i=1, 2, ..., 7; is a set of preset weight factors; A set of preset temperature monitoring data thresholds. Short-circuit any two phases at the output end, monitor the output current and device status of the mine-used flameproof and intrinsically safe high-voltage frequency conversion equipment to be tested at this time, when the output current of the mine-used flameproof and intrinsically safe high-voltage frequency conversion equipment to be tested is immediately cut off and a fault display is generated, set the short-circuit protection parameter e4 to the preset value A, otherwise it is B; the value of A is greater than B; the voltage in the mine-used flameproof and intrinsically safe high-voltage frequency conversion equipment to be tested is loaded to a preset multiple of the rated load through a high-voltage generator, and the mine-used flameproof and intrinsically safe high-voltage frequency conversion equipment to be tested is obtained through a time sensor. The time when the protective action and fault display of the intrinsically safe high-voltage frequency conversion equipment are generated is recorded as the overload parameter e5; when the input phase of the tested mining explosion-proof and intrinsically safe high-voltage frequency conversion equipment is broken, when the equipment immediately disconnects the output circuit and generates an input phase-break alarm, the input phase-break protection parameter e6 is set to C, otherwise it is D, and C is greater than D; when the output phase of the tested mining explosion-proof and intrinsically safe high-voltage frequency conversion equipment is broken, when the equipment immediately disconnects the output circuit and generates an output phase-break alarm, the output phase-break protection parameter e7 is set to E, otherwise it is F, and E is greater than F; through the formula Calculate the fault protection index E7, where k4, k5, k6, and k7 are preset weight factors. Calculating the intrinsic safety performance index ,in , and is the preset weight factor.

[0014] As a preferred embodiment of the present invention, the high-voltage frequency conversion performance test module determines the high-voltage frequency conversion index through acceleration and deceleration time adjustment test, forward and reverse test and speed stability test, and the specific process is as follows:

[0015] Increase the output frequency of the tested mining flameproof and intrinsically safe high-voltage frequency conversion equipment from 0 Hz to the preset frequency, and record the acceleration time tacceleration to complete the frequency increase; then reduce the output frequency of the mining flameproof and intrinsically safe high-voltage frequency conversion equipment from the preset frequency to 0 Hz, record the deceleration time tdeceleration to complete the frequency reduction, calculate the average value of tacceleration and tdeceleration and record it as the acceleration and deceleration time adjustment index E8; connect the output power cable of the mining flameproof and intrinsically safe high-voltage frequency conversion equipment to be tested to the motor, maintain the input current, input voltage and output power cable phase sequence of the mining flameproof and intrinsically safe high-voltage frequency conversion equipment to be tested unchanged, set the inverter output to forward, record the time tforward from the start of the motor to reach the rated speed, maintain the rated speed for a preset time one, and then record the motor speed nj within the preset time every preset time two, calculate the difference between the maximum motor speed and the rated speed and record it as the speed stability index E9, and then turn off the mining flameproof and intrinsically safe high-voltage frequency conversion equipment to be tested. After the motor stops running, set the inverter output to reverse, and record the time t reverse from the motor starting to reaching the rated speed. Calculate the average of t forward and t reverse and record it as the forward and reverse index E10. Calculate the high voltage frequency conversion index ,in , and is the preset weight factor.

[0016] As a preferred embodiment of the present invention, the comprehensive analysis module records the flatness index E1, weld index E2, flaw detection index E3, reliability index E4, explosion-proof index , explosion-proof index , dielectric index E5, temperature change index E6, fault protection index E7, intrinsic safety performance index , acceleration and deceleration time adjustment index E8, speed stability index E9, forward and reverse parameters E10 and high voltage frequency conversion index The explosion-proof index is used as the major axis length and the explosion-proof index is used as the minor axis length to construct an ellipse. The area of ​​the ellipse is extracted and then multiplied by a preset weight factor to obtain the comprehensive explosion-proof index. , multiply the comprehensive explosion-proof index, intrinsic safety performance index and high-voltage frequency conversion index by a preset weight factor and then sum them to obtain the comprehensive evaluation index When the comprehensive evaluation index is greater than or equal to the preset threshold, the test result is recorded as a qualified test, otherwise the test result is recorded as a failed test. Each index has a preset reference maximum value and reference minimum value, and an index greater than the reference maximum value or less than the reference minimum value is marked as an over-limit index.

[0017] As a preferred embodiment of the present invention, the report generation module obtains all indexes of the comprehensive module, the corresponding reference maximum values ​​and test results to generate a test result report, and marks the over-limit index in the test result report; obtains the values ​​of all weight factors in the explosion-proof performance test module, the intrinsic safety performance test module and the high-voltage frequency conversion performance test module, the values ​​of all parameters and the calculation process of the formula, generates a detailed calculation book and prints the test result report and the calculation book through a printer.

[0018] Compared with the prior art, the present invention has the following beneficial effects:

[0019] The invention determines the explosion-proof index and the flameproof index through a static pressure test, and uses an air pressure pump to apply pressure to the flameproof box of the flameproof and intrinsically safe high-voltage frequency conversion equipment for mining to be tested, replacing the traditional test method of using a water pressure valve to fill the box with clean water and then pressurize it, eliminating the step of carefully wiping the outer surface of the box with a dry cotton cloth after the test to ensure that there is no residual moisture, reducing unnecessary mechanical labor during the test, eliminating the interference of external moisture on subsequent experiments, and improving the reliability and safety of the entire comprehensive test system;

[0020] The present invention determines various parameters of the tested mining explosion-proof and intrinsically safe high-voltage frequency conversion equipment through sensors and internal ignition non-explosion transmission test, dielectric test, thermal performance test, short circuit and overload test, acceleration and deceleration time adjustment test, forward and reverse test and speed stability test, thereby improving the automation of detection equipment and technology, improving the detection system, and conducting in-depth analysis of the detection results, thereby improving the accuracy and reliability of data processing of the entire comprehensive test system;

[0021] The present invention obtains all indexes of the comprehensive module, the corresponding reference maximum values ​​and the test results to generate a test result report sheet through a report generation module, marks the over-limit index in the test result report sheet, generates a detailed calculation sheet and prints the test result report sheet and the calculation sheet through a printer, and visualizes the test process and results, thereby improving the interpretability of data and the user perception of the entire comprehensive test system. BRIEF DESCRIPTION OF THE DRAWINGS

[0022] In order to facilitate understanding by those skilled in the art, the present invention is further described below with reference to the accompanying drawings.

[0023] Figure 1 It is the overall principle block diagram of the present invention;

[0024] Figure 2 It is a schematic diagram of an embodiment of a test result report sheet of the present invention. DETAILED DESCRIPTION

[0025] The technical solution of the present invention will be clearly and completely described below in conjunction with the embodiments. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0026] See also Figure 1 As shown, a mine-used explosion-proof and intrinsically safe high-voltage frequency conversion comprehensive test system includes an explosion-proof performance test module, an intrinsic safety performance test module, a high-voltage frequency conversion performance test module, a comprehensive analysis module and a report generation module.

[0027] The explosion-proof performance test module determines the explosion-proof index and explosion-proof index through sensors and static pressure tests. The specific process is as follows:

[0028] Open the flameproof box of the mine-used flameproof and intrinsically safe high-voltage frequency conversion equipment to be tested, use a laser displacement sensor to scan the outer surface of the flameproof box and obtain the flatness, count the flatness of all surfaces and record it as the flatness index E1, use a laser displacement sensor to scan the welding surface of the flameproof box and obtain the flatness, which is recorded as the weld index E2; use an ultrasonic flaw detector to emit ultrasonic waves to the entire flameproof box, analyze the reflection intensity and time of the sound waves to obtain the number of bubbles and cracks inside the flameproof box and record it as the flaw detection index E3; thoroughly remove the anti-rust oil on the flameproof surface of the flameproof box, ensure that the rubber rings, plugging plates, gaskets and other components of the flameproof box have been fully installed and close the flameproof box. Then, air is injected into the box through an air pump, and the air outlet pipe of the air pump is connected to the air inlet of the explosion-proof box. The air pump is adjusted to make the air pressure in the box reach the preset pressure, and the air outlet flow rate e1 of the air pump is recorded. After maintaining the preset air pressure for a preset time, the laser displacement sensor is used to scan the outer surface of the explosion-proof box and obtain the flatness parameter e2 of the surface, and the air outlet flow rate e3 of the air pump at this time is recorded. The formula Calculate the reliability index E4, where k1 and k2 are preset weight factors, by the formula Calculate explosion protection index ,in , , and The air in the explosion-proof box is pumped out to return the air pressure inside the box to a standard atmospheric pressure, and anti-rust oil is applied to the surface of the explosion-proof surface.

[0029] The explosion-proof performance test module determines the explosion-proof parameters through an internal ignition non-explosion test. The specific process is as follows:

[0030] Place the tested explosion-proof and intrinsically safe high-voltage frequency conversion equipment for mining on a test bench in a professional laboratory environment, and inject a mixed gas of preset concentration and preset combustibles into the explosion-proof box of the explosion-proof and intrinsically safe high-voltage frequency conversion equipment for mining through a pressure valve. Use a spark plug to ignite the mixed gas inside the explosion-proof box. Obtain the temperature parameter t and pressure parameter p in the environment through the pressure sensor and temperature sensor outside the explosion-proof box, and then use a laser displacement sensor to scan the outer surface of the explosion-proof box and obtain the flatness parameter e4 of the surface. Use the formula Calculation of explosion-proof index ,in , and is the preset weight factor; t0 is the preset standard temperature, and p0 is the preset standard air pressure.

[0031] The intrinsic safety performance test module determines the intrinsic safety performance index through dielectric testing, thermal performance testing, and short circuit and overload testing. Specifically:

[0032] Connect the circuit of the tested mining flameproof and intrinsically safe high-voltage frequency conversion equipment to the high-voltage generator, output the preset voltage through the high-voltage generator, and maintain the preset time, and use the electric field sensor to record the number of breakdown and flashover phenomena N and leakage current I generated by the tested mining flameproof and intrinsically safe high-voltage frequency conversion equipment within the preset time. Calculate the dielectric index E5, where K3 is a preset weight factor;

[0033] Adjust the voltage in the high-voltage generator to the working voltage of the flameproof and intrinsically safe high-voltage frequency conversion equipment for mining to be tested, and after maintaining the working voltage for a preset time, obtain the temperature monitoring data of the flameproof and intrinsically safe high-voltage frequency conversion equipment for mining to be tested through the temperature sensor, including the heat sink temperature t1, the inner cavity temperature t2, the inner cavity wire temperature t3, the explosion-proof box shell temperature t4, the capacitor temperature t5, the terminal temperature t6 and the transformer winding temperature t7. Through the formula Calculate the temperature change index E6, where i is the temperature monitoring data number, i=1, 2, ..., 7; is a set of preset weight factors; A set of preset temperature monitoring data thresholds. Short-circuit any two phases at the output end, monitor the output current and device status of the mine-used flameproof and intrinsically safe high-voltage frequency conversion equipment to be tested at this time, when the output current of the mine-used flameproof and intrinsically safe high-voltage frequency conversion equipment to be tested is immediately cut off and a fault display is generated, set the short-circuit protection parameter e4 to the preset value A, otherwise it is B; the value of A is greater than B; the voltage in the mine-used flameproof and intrinsically safe high-voltage frequency conversion equipment to be tested is loaded to a preset multiple of the rated load through a high-voltage generator, and the mine-used flameproof and intrinsically safe high-voltage frequency conversion equipment to be tested is obtained through a time sensor. The time when the protective action and fault display of the intrinsically safe high-voltage frequency conversion equipment are generated is recorded as the overload parameter e5; when the input phase of the tested mining explosion-proof and intrinsically safe high-voltage frequency conversion equipment is broken, when the equipment immediately disconnects the output circuit and generates an input phase-break alarm, the input phase-break protection parameter e6 is set to C, otherwise it is D, and C is greater than D; when the output phase of the tested mining explosion-proof and intrinsically safe high-voltage frequency conversion equipment is broken, when the equipment immediately disconnects the output circuit and generates an output phase-break alarm, the output phase-break protection parameter e7 is set to E, otherwise it is F, and E is greater than F; through the formula Calculate the fault protection index E7, where k4, k5, k6, and k7 are preset weight factors. Calculating the intrinsic safety performance index ,in , and is the preset weight factor.

[0034] The high-voltage frequency conversion performance test module determines the high-voltage frequency conversion index through acceleration and deceleration time adjustment test, forward and reverse test and speed stability test. The specific process is as follows:

[0035] Increase the output frequency of the tested mining flameproof and intrinsically safe high-voltage frequency conversion equipment from 0 Hz to the preset frequency, and record the acceleration time tacceleration to complete the frequency increase; then reduce the output frequency of the mining flameproof and intrinsically safe high-voltage frequency conversion equipment from the preset frequency to 0 Hz, record the deceleration time tdeceleration to complete the frequency reduction, calculate the average value of tacceleration and tdeceleration and record it as the acceleration and deceleration time adjustment index E8; connect the output power cable of the mining flameproof and intrinsically safe high-voltage frequency conversion equipment to be tested to the motor, maintain the input current, input voltage and output power cable phase sequence of the mining flameproof and intrinsically safe high-voltage frequency conversion equipment to be tested unchanged, set the inverter output to forward, record the time tforward from the start of the motor to the rated speed, maintain the rated speed for a preset time one, and then record the motor speed nj within the preset time every preset time two, calculate the difference between the maximum motor speed and the rated speed and record it as the speed stability index E9, and then turn off the mining flameproof and intrinsically safe high-voltage frequency conversion equipment to be tested. After the motor stops running, set the inverter output to reverse, and record the time t reverse from the motor starting to reaching the rated speed. Calculate the average of t forward and t reverse and record it as the forward and reverse index E10. Calculate the high voltage frequency conversion index ,in , and is the preset weight factor.

[0036] The comprehensive analysis module records the flatness index E1, weld index E2, flaw detection index E3, reliability index E4, and explosion-proof index , explosion-proof index , dielectric index E5, temperature change index E6, fault protection index E7, intrinsic safety performance index , acceleration and deceleration time adjustment index E8, speed stability index E9, forward and reverse parameters E10 and high voltage frequency conversion index The explosion-proof index is used as the major axis length and the explosion-proof index is used as the minor axis length to construct an ellipse. The area of ​​the ellipse is extracted and then multiplied by a preset weight factor to obtain the comprehensive explosion-proof index. , multiply the comprehensive explosion-proof index, intrinsic safety performance index and high-voltage frequency conversion index by a preset weight factor and then sum them to obtain the comprehensive evaluation index When the comprehensive evaluation index is greater than or equal to the preset threshold, the test result is recorded as a qualified test, otherwise the test result is recorded as a failed test. Each index has a preset reference maximum value and reference minimum value, and an index greater than the reference maximum value or less than the reference minimum value is marked as an over-limit index.

[0037] See also Figure 2As shown, the report generation module obtains all indexes of the comprehensive module, the corresponding reference maximum values ​​and test results to generate a test result report, and marks the over-limit index in the test result report; obtains the values ​​of all weight factors in the explosion-proof performance test module, the intrinsic safety performance test module and the high-voltage frequency conversion performance test module, the values ​​of all parameters and the calculation process of the formula, generates a detailed calculation book and prints the test result report and the calculation book through a printer.

[0038] It should be understood that the terms "include" and "comprising" used in the specification and claims of the present disclosure indicate the presence of described features, integers, steps, operations, elements and / or components, but do not exclude the presence or addition of one or more other features, integers, steps, operations, elements, components and / or collections thereof.

[0039] It should also be understood that the terms used in this disclosure are only for the purpose of describing specific embodiments and are not intended to limit the disclosure. As used in this disclosure and claims, the singular forms "a", "an", and "the" are intended to include plural forms unless the context clearly indicates otherwise. It should also be further understood that the term "and / or" used in this disclosure and claims refers to any combination of one or more of the associated listed items and all possible combinations, and includes these combinations;

[0040] The preferred embodiments of the present invention disclosed above are only used to help explain the present invention. The preferred embodiments do not describe all the details in detail, nor do they limit the invention to only specific implementation methods. Obviously, many modifications and changes can be made according to the content of this specification. This specification selects and specifically describes these embodiments in order to better explain the principles and practical applications of the present invention, so that those skilled in the art can understand and use the present invention well. The present invention is limited only by the claims and their full scope and equivalents.

Claims

1. A mine-use explosion-proof and intrinsically safe high-voltage frequency conversion comprehensive test system, comprising an explosion-proof performance test module, an intrinsic safety performance test module, a high-voltage frequency conversion performance test module, a comprehensive analysis module and a report generation module, characterized in that: The explosion-proof performance test module uses a laser displacement sensor to scan the explosion-proof box of the mine explosion-proof and intrinsically safe high-voltage frequency conversion to obtain the flatness index and weld index; uses an ultrasonic flaw detector to emit ultrasonic waves to the explosion-proof box and analyzes the reflection intensity and time of the sound waves to obtain the flaw detection index; connects the air pressure pump outlet pipe to the explosion-proof box air inlet nozzle, injects air into the box through the air pressure pump and adjusts the air pressure pump to make the air pressure in the box reach the preset air pressure, maintains the preset air pressure for a preset time, and obtains the flow parameter by calculating the flow difference of the air pressure valve, obtains the flatness parameter by the flatness difference of the laser displacement sensor, and then obtains the reliability index and explosion-proof index by calculation; determines the explosion-proof index through the internal ignition non-explosion test, and the specific process is as follows: The tested explosion-proof and intrinsically safe high-voltage frequency conversion equipment for mining is placed on a test bench in a professional laboratory environment, and a mixed gas of preset concentration and preset combustibles is injected into the explosion-proof box of the explosion-proof and intrinsically safe high-voltage frequency conversion equipment for mining through a pressure valve; a spark plug is used to ignite the mixed gas inside the explosion-proof box; the air temperature parameter t and air pressure parameter p in the environment are obtained through the air pressure sensor and temperature sensor outside the explosion-proof box, and then a laser displacement sensor is used to scan the outer surface of the explosion-proof box and obtain the flatness parameter e4 of the surface, and the formula Calculate the explosion-proof index ,in , and is a preset weight factor; e4 is the flatness parameter measured after the internal ignition non-detonation test, and E1 is the flatness index measured before the internal ignition non-detonation test; t is a temperature parameter, and t0 is a preset standard temperature; Where p is the air pressure parameter, and p0 is the preset standard air pressure; The air in the explosion-proof box is extracted to return the air pressure inside the box to a standard atmospheric pressure, and anti-rust oil is applied to the surface of the explosion-proof surface; the device to be tested is placed on a test bench in a professional laboratory environment, and a mixed gas of preset concentration and preset combustibles is injected into the explosion-proof box of the device to be tested through a pressure valve; a spark plug is used to ignite the mixed gas inside the explosion-proof box, and the air temperature parameters and air pressure parameters in the environment are obtained through the air pressure sensor and temperature sensor outside the explosion-proof box, and then a laser displacement sensor is used to scan the outer surface of the explosion-proof box and obtain the flatness parameters of the surface, and the explosion-proof index is obtained through calculation; The intrinsic safety performance test module outputs a preset voltage through a high-voltage generator connected to the device under test. After the preset voltage is maintained for a preset time, the number of breakdown and flashover phenomena and the leakage current are obtained and analyzed to obtain the dielectric index; after adjusting the voltage in the high-voltage generator to the working voltage and maintaining it for a preset time, temperature data including the heat sink temperature, the inner cavity temperature, the inner conductor temperature, the explosion-proof box shell temperature, the capacitor temperature, the terminal temperature and the transformer winding temperature are obtained and calculated and analyzed to obtain the temperature change index; any two phases of the output end are short-circuited and the output current and device status of the device under test are monitored to determine the value of the short-circuit protection parameter; the voltage in the device under test is loaded to a preset multiple of the rated load, the time when the device under test generates protection action and fault display is obtained and recorded as the overload parameter; the input phase of the device under test is disconnected, and the input phase loss protection parameter is determined by whether the output circuit of the device under test is disconnected and the input phase loss alarm is generated; The output phase of the device under test is disconnected, and the output phase failure protection parameters are determined by whether the output circuit of the device under test is disconnected and the output phase failure alarm is generated; The fault protection index and intrinsic safety performance index are obtained through calculation; The equipment to be tested is a mine-used explosion-proof and intrinsically safe high-voltage frequency conversion equipment; The high-voltage frequency conversion performance test module is used to adjust and analyze the output frequency of the equipment under test to obtain the acceleration and deceleration time adjustment index, forward and reverse index and high-voltage frequency conversion index. The specific process is as follows: Increase the output frequency of the device under test from 0 Hz to a preset frequency, then reduce the output frequency of the device under test from the preset frequency to 0 Hz, record the acceleration time and deceleration time, and obtain the acceleration and deceleration time adjustment index through calculation; connect the output power cable of the device under test to the motor, maintain the input current, input voltage and output power cable phase sequence of the device under test unchanged, set the inverter output to forward rotation, record the time from the start of the motor to the rated speed and maintain the rated speed for a preset time of one, then record the motor speed within the preset time every preset time of two, calculate the difference between the maximum motor speed and the rated speed and record it as the speed stability index, and then turn off the device under test; After the motor stops running, set the inverter output to reverse, record the time from the motor starting to reaching the rated speed, and obtain the forward and reverse index and high-voltage frequency conversion index through calculation; The comprehensive analysis module records the flatness index, weld index, flaw detection index, reliability index, explosion-proof index, flameproof index, dielectric index, temperature change index, fault protection index, intrinsic safety performance index, acceleration and deceleration time adjustment index, speed stability index, forward and reverse parameters and high-voltage frequency conversion index, and constructs an ellipse with the value of the explosion-proof index as the major axis length and the value of the flameproof index as the minor axis length, extracts the area of ​​the ellipse and then multiplies it by a preset weight factor to obtain a comprehensive flameproof index, multiplies the values ​​of the comprehensive flameproof index, intrinsic safety performance index and high-voltage frequency conversion index by a preset weight factor respectively and then sums them to obtain a comprehensive evaluation index, and when the comprehensive evaluation index is greater than or equal to a preset threshold value, the test result is recorded as a qualified test, otherwise the test result is recorded as a failed test; Each index has a preset reference maximum and reference minimum value, and the index that is greater than the reference maximum or less than the reference minimum is marked as an out-of-limit index; all indexes and analysis results are sent to the report generation module; The report generation module obtains all the indexes of the comprehensive analysis module, the corresponding reference maximum values ​​and the test results to generate a test result report sheet, and marks the over-limit index in the test result report sheet; Obtain the values ​​of all weight factors, values ​​of all parameters and calculation process of formulas in the explosion-proof performance test module, intrinsic safety performance test module and high-voltage frequency conversion performance test module, generate a detailed calculation sheet and print the test result report and calculation sheet through a printer.

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