CN219266162U - Pure oxygen environment material electrostatic discharge ignition test device - Google Patents
Pure oxygen environment material electrostatic discharge ignition test device Download PDFInfo
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- CN219266162U CN219266162U CN202223586257.9U CN202223586257U CN219266162U CN 219266162 U CN219266162 U CN 219266162U CN 202223586257 U CN202223586257 U CN 202223586257U CN 219266162 U CN219266162 U CN 219266162U
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
- Y02E20/00—Combustion technologies with mitigation potential
- Y02E20/34—Indirect CO2mitigation, i.e. by acting on non CO2directly related matters of the process, e.g. pre-heating or heat recovery
Abstract
The utility model provides a pure oxygen environment material electrostatic discharge ignition performance testing device, which comprises: the device comprises a pure oxygen environment ignition box, a sample replacement mechanism, a discharge electrode and an in-box environment measurement and control assembly, wherein the sample replacement mechanism, the discharge electrode and the in-box environment measurement and control assembly are fixed in the pure oxygen environment ignition box. By the device, a high-oxygen-concentration gas environment can be constructed, electrostatic discharge tests of related materials are carried out in the high-oxygen-concentration gas environment, and a sample replacement mechanism is utilized to carry out multiple electrostatic discharge ignition tests under the condition that the gas environment in the box is not damaged, so that the minimum ignition energy of the materials is rapidly determined; the device solves the problem that the existing device can not perform material electrostatic discharge ignition test under pure oxygen environment and different oxygen pressures.
Description
Technical Field
The utility model belongs to the field of initiating explosive device testing equipment, and particularly relates to a pure oxygen environment material electrostatic discharge ignition property testing device.
Background
The minimum ignition energy of the test material in the high-concentration oxygen environment is required to be carried out for multiple times and multiple groups of static discharge ignition tests on the material in the oxygen environment, and the test program can be carried out according to the lifting method program specified by GJB377 or other applicable sensitivity test mathematical statistics method programs. The electrostatic discharge ignition is realized by discharging a capacitor charged to a certain voltage through a certain resistor to observe whether the tested material ignites or not.
The electrostatic discharge ignition test is often used for initiating explosive devices electrostatic sensitivity tests, such as initiating explosive device electrostatic sensitivity testers. The product can only be used for initiating explosive device electrostatic discharge ignition test in common laboratory environment, and no relevant equipment for developing material electrostatic discharge ignition test in pure oxygen environment and under different oxygen pressures exists at present.
Disclosure of Invention
The utility model aims to solve the problem that the existing equipment cannot perform electrostatic discharge ignition test of materials under pure oxygen environment and different oxygen pressures.
The utility model aims at realizing the following technical scheme:
a pure oxygen environment material electrostatic discharge ignitability test device, the test device comprising: the device comprises a pure oxygen environment ignition box, a sample replacement mechanism, a discharge electrode and an in-box environment measurement and control assembly, wherein the sample replacement mechanism, the discharge electrode and the in-box environment measurement and control assembly are fixed in the pure oxygen environment ignition box.
Preferably, the pure oxygen environment ignition box comprises a pure oxygen environment ignition box body and a pure oxygen ignition box door which is in openable connection with the pure oxygen environment ignition box body.
Preferably, the sample replacing mechanism comprises a mechanism support, a motor fixed on the mechanism support, a coupler in transmission connection with the motor, a turntable table top connected with the coupler, and a conductive slip ring connected with the table top.
Preferably, the turret table includes a plurality of sample holders.
Preferably, the sample base is a columnar metal body with a binding ring groove.
Preferably, the in-box environment measurement and control assembly comprises: the high-voltage discharge system is connected with the discharge motor, the exhaust equipment is communicated with the pure oxygen environment ignition box, the sensor component is fixed inside the pure oxygen environment ignition box, the air supply pipeline is communicated with the pure oxygen environment ignition box, and the display control system is used for controlling the discharge motor to discharge the gas; the display control system is connected with the exhaust equipment, the sensor component and the air supply pipeline.
Preferably, the in-box environment measurement and control assembly further comprises a temperature and humidity regulator fixed inside the pure oxygen environment ignition box and electrically connected with the display control system.
Preferably, the sensor assembly includes a temperature and humidity sensor and an oxygen concentration sensor.
Preferably, the gas supply line includes a carbon dioxide gas supply pipe and a pure oxygen gas supply pipe.
Preferably, the orifice of the carbon dioxide gas supply pipe is arranged at one side of the tested material.
Compared with the prior art, the utility model has the beneficial effects that:
the utility model provides a pure oxygen environment material electrostatic discharge ignition performance testing device, which comprises: the device comprises a pure oxygen environment ignition box, a sample replacement mechanism, a discharge electrode and an in-box environment measurement and control assembly, wherein the sample replacement mechanism, the discharge electrode and the in-box environment measurement and control assembly are fixed in the pure oxygen environment ignition box. By the device, a high-oxygen-concentration gas environment can be constructed, electrostatic discharge tests of related materials are carried out in the high-oxygen-concentration gas environment, and a sample replacement mechanism is utilized to carry out multiple electrostatic discharge ignition tests under the condition that the gas environment in the box is not damaged, so that the minimum ignition energy of the materials is rapidly determined; the device solves the problem that the existing device can not perform material electrostatic discharge ignition test under pure oxygen environment and different oxygen pressures.
Drawings
FIG. 1 is a schematic diagram of a device for testing the electrostatic discharge ignition performance of a pure oxygen environment material according to the present utility model;
FIG. 2 is a schematic diagram of a charge-discharge test circuit;
FIG. 3 is a schematic diagram of sample placement;
FIG. 4 is a schematic view of a sample exchange mechanism;
FIG. 5 is a schematic view showing a state in which a sample to be measured is placed on a table surface of a turntable;
wherein: 1-pure oxygen environment ignition box, 2-pure oxygen ignition box door, 3-sample replacement mechanism, 4-sample to be detected, 5-discharge electrode, 6-flame retardant insulating sleeve, 7-manometer, 8-pure oxygen gas supply pipe, 9-carbon dioxide gas supply pipe, 10-exhaust port, 3.1-turntable mesa 3.2-conductive slip ring 3.3-coupling 3.4 motor 3.5 mechanism support, 4.1-sample test piece 4.2-sample base 4.3-fixed binding wire.
Detailed Description
The technical solution is further described below with reference to the drawings and the specific embodiments to help understand the content of the present utility model.
1. Structural composition
As shown in fig. 1, a pure oxygen environment material electrostatic discharge ignition performance testing apparatus, the testing apparatus comprises: the device comprises a pure oxygen environment ignition box, a sample replacement mechanism 3, a discharge electrode 5 and an in-box environment measurement and control component, wherein the sample replacement mechanism 3, the discharge electrode 5 and the in-box environment measurement and control component are fixed in the pure oxygen environment ignition box; the test device further includes: display control system, high-voltage discharge system, air source, exhaust equipment, etc.
The discharge electrode 5 is externally sleeved with a flame-retardant insulating sleeve 6 to ensure that the discharge process only occurs at the tip position of the discharge electrode 5.
The pure oxygen environment ignition box comprises a pure oxygen environment ignition box body 1 and a pure oxygen ignition box door 2 which is in openable connection with the pure oxygen environment ignition box body 1.
The pure oxygen ambient ignition box includes an exhaust port 10 in communication with an exhaust apparatus.
The sample replacing mechanism 3 comprises a mechanism support 3.5, a motor 3.4 fixed on the mechanism support 3.5, a coupler 3.3 in transmission connection with the motor 3.4, a turntable table top 3.1 connected with the coupler 3.3 and a conductive slip ring 3.2 connected with the turntable table top 3.1.
The turret table top 3.1 comprises a plurality of sample holders 4.2.
The sample base 4.2 is a columnar metal body with a binding ring groove.
The in-box environment measurement and control assembly comprises: the high-voltage discharge system is connected with the discharge motor, the exhaust equipment is communicated with the pure oxygen environment ignition box, the sensor component is fixed inside the pure oxygen environment ignition box, the air supply pipeline is communicated with the pure oxygen environment ignition box, and the display control system is used for controlling the discharge motor to discharge the gas; the display control system is connected with the exhaust equipment, the sensor component and the air supply pipeline.
The in-box environment measurement and control assembly further comprises a temperature and humidity regulator which is fixed inside the pure oxygen environment ignition box and is electrically connected with the display control system.
The sensor assembly includes a temperature and humidity sensor and an oxygen concentration sensor.
The gas supply line comprises a carbon dioxide gas supply pipe 9 and a pure oxygen gas supply pipe 8.
The orifice of the carbon dioxide gas supply pipe is arranged on one side of the tested material.
1.1 pure oxygen environment discharge box mainly includes discharge box 1, discharge box chamber door 2, discharge electrode 5, sample change mechanism 3, temperature and humidity regulator, temperature and humidity sensor, oxygen concentration sensor, manometer 7 etc.. The pure oxygen environment discharge box is used for accommodating a sample to be tested and forming a pure oxygen environment, the sample to be tested is discharged in the discharge box, various sensors are arranged in the discharge box and used for monitoring the temperature and humidity, the pressure and the oxygen concentration in the box, and meanwhile, a heater, a refrigerator, a humidifier and the like humidity regulator for controlling the temperature and the humidity are also arranged in the box.
1.2 the display control system comprises a temperature and humidity controller, a temperature and humidity display, an oxygen supply controller, an oxygen concentration display, an exhaust controller, a fire extinguishing controller and the like. The display control system is used for collecting signals of various sensors, displaying numerical values, controlling air supply of an air source and exhaust of exhaust equipment, and controlling a temperature and humidity regulator in the discharge box to perform automatic temperature and humidity control according to the collected temperature and humidity numerical values.
1.3 high-voltage discharge system comprises a high-voltage source, a resistor-capacitor circuit and a high-voltage meter, and forms a charge-discharge circuit so as to carry out high-voltage discharge on the sample in the discharge box.
1.4 the air source comprises a pure oxygen bottle and a carbon dioxide bottle, wherein the pure oxygen bottle is used for supplying oxygen into a pure oxygen environment discharge box, and the carbon dioxide bottle is used for extinguishing fire when a sample is ignited.
2. Technical proposal
2.1 ignition Performance test Environment construction
To evaluate the electrostatic ignition energy of nonmetallic materials in pure oxygen, high oxygen concentration application environments, a pure oxygen environment meeting the practical use working condition pressure needs to be constructed. The pure oxygen environment discharge box is a closed box body, and the gas in the pure oxygen environment discharge box is replaced by high-concentration oxygen through repeated inflation and exhaustion. The gas replacement in the pure oxygen environment discharge box is controlled by a display control system, wherein the gas source charging pipeline and the exhaust pipeline of the exhaust equipment are connected to the internal space of the pure oxygen environment discharge box after passing through the display control system, and the on-off of the pipeline is controlled by the display control system. When in inflation, an air source inflation pipeline valve is opened, and oxygen is inflated into the ignition box; and opening the valve of the exhaust equipment and the exhaust pipeline during exhaust to extract the gas in the ignition box. And monitoring the oxygen concentration of the gas environment in the ignition box through an oxygen concentration sensor, and repeating the gas charging and discharging operations for a plurality of times until the oxygen concentration reaches the requirement.
The temperature and humidity sensor in the ignition box is used for acquiring temperature and humidity data to perform feedback control on a temperature and humidity regulator in the ignition box, and a heater (a heating plate), a refrigerator (a semiconductor refrigerator in general) and a humidifier are arranged in the ignition box, so that dehumidification is realized by filling dry oxygen and replacing humid gas in the box.
A circulating fan, a safety valve and the like are also arranged in the ignition box, and the temperature and the humidity of the gas in the box are uniformly distributed by the circulating fan; the safety valve can prevent the over-charging in the charging process, and the valve can be automatically opened and the air is discharged during the over-charging.
Through the mode, the construction of the high-concentration oxygen environment meeting the specified pressure, temperature and humidity conditions in the ignition box is realized.
2.2 Charge and discharge test Circuit
When the material is subjected to electrostatic discharge, the high-voltage discharge system charges the discharge capacitor and discharges the sample 4 to be tested on the sample replacing mechanism through the discharge electrode in the ignition box. The circuit in the high-voltage discharge system is shown in fig. 2, and the high-voltage source charges the discharge capacitor through the charging resistor; when discharging, the switch is switched to the discharging loop, the discharging capacitor is connected with the discharging electrode, and the electrostatic potential of the discharging electrode is the charging potential of the discharging capacitor. In the use process, the discharge capacitor and the discharge resistor can be replaced according to the electrostatic discharge model to be tested.
As shown in fig. 3, the sample base 4.2 is cylindrical and has a binding ring groove in the middle, the sample test piece 4.1 is mounted on the metal sample base 4.2 by fixing the binding wire 4.3, and the sample base 4.2 is grounded. When the discharge electrode is close to the sample test piece 4.1, an electric field is formed between the electrode and the sample base 4.2 on which the sample test piece 4.1 is mounted, when the distance is small enough and the electric field strength is large enough, the discharge electrode discharges to the ground through the sample base 4.2, and an arc generated by the discharge penetrates through the sample test piece 4.1, so that the ignitability of the sample test piece 4.1 under the arc generated by electrostatic discharge is inspected.
2.3 sample to be measured and sample exchange mechanism
The sample replacing mechanism is a turntable capable of placing a plurality of samples to be tested, as shown in fig. 4 and 5. Wherein the turntable table top 3.1 is a round metal table top, and sample mounting positions (round holes) are uniformly distributed along the edge of the table top. Each sample is cut to size and then bound to a cylindrical metal sample holder 4.2 and placed on the sample mounting location of the turret. The turntable table top 3.1 is connected with the motor 3.4, the motor 3.4 rotates under the control of the display control system, after the discharge of one sample test piece 4.1 is completed, the table top is controlled to rotate to move the one sample test piece 4.1 to the position right below the discharge electrode 5, so that the test on a plurality of samples is realized under the conditions that the pure oxygen environment discharge box is not opened and the gas environment in the box is destroyed. The rotary shaft of the rotary table of the sample replacing mechanism 3 is provided with a conductive slip ring 3.2, the stator of the conductive slip ring 3.2 is grounded, and the rotor is connected with the table top 3.1 of the rotary table, so that the grounding of the sample seat 4.2 is realized.
In order to avoid that the flame is too large to control after ignition of the sample piece 4.1, the device uses the sample piece 4.1 with a small size as much as possible, the sample piece 4.1 is arranged on a cylindrical metal sample base 4.2, and the size of the sample piece 4.1 is determined by being capable of wrapping one end of the sample base 4.2. When the sample base 4.2 is placed on the turret table top 3.1, the sample is higher than the turret table top 3.1 and closer to the discharge electrode 5, thereby ensuring that the arc generated when the electrode is discharged passes through the sample coupon 4.1, rather than discharging the turret table top 3.1, as shown in fig. 5.
2.4 post-ignition treatment
The device uses liquefied carbon dioxide gas source as fire extinguishing gas, controls the carbon dioxide gas charging valve through the display control system, and the orifice of the carbon dioxide charging pipeline is aligned to the area beside the discharge position. When the discharge probe initiates ignition, a fire extinguishing switch on the display control system is immediately pressed, at the moment, the control system controls the turntable to rotate a certain angle to be far away from the discharge electrode and align to the pipe orifice of the carbon dioxide gas charging pipeline, and simultaneously controls the carbon dioxide gas charging valve to be opened to spray carbon dioxide gas on the ignition sample for fire extinguishment.
If the oxygen concentration does not meet the requirement after fire extinguishment, the gas filling and exhausting operation is repeated to replace the gas, and the subsequent test is performed after the oxygen concentration meets the requirement.
3. Workflow process
3.1 sample preparation
Preparing not less than 30 (not less than 30 XN in N groups of tests) round sample test pieces 4.1 with the same size, wrapping the end face of a metal sample base 4.2 with the sample test pieces 4.1, and binding and fixing the test pieces on the sample base 4.2 by ropes, as shown in figure 3.
3.2 State setting of ignition Performance test apparatus
And taking a certain amount of sample to be measured from the constant temperature and humidity box, placing the sample on a sample turntable in the ignition box, closing the door of the ignition box, adjusting the temperature and humidity environment in the ignition box to a required state through a display control system, and simultaneously inflating and exhausting until the gas in the ignition box is replaced by high-concentration oxygen.
3.3 discharge heuristic
Discharge heuristics were performed using the lift-off procedure specified by GJB 377. The general no-grouping test at least comprises 30 times of probing, one sample is needed for each probing, after all the samples on the sample turntable are tested, under the condition that no pressure difference exists in the ignition box, the ignition box door is opened, all the samples are replaced, and then the test is carried out according to the process until the 30 times of ignition probing are completed.
3.4 test data calculation processing
Data processing is carried out according to a lifting method program specified by GJB377, the ignition probability corresponding to the minimum ignition energy is taken as one thousandth, and the minimum ignition voltage mu is obtained m i n The estimated values are:
wherein C is the discharge capacitance of the discharge model in the high-voltage discharge system of the device.
The utility model realizes the test of the electrostatic ignition energy of the material in the high-concentration oxygen environment, and is characterized in that:
1. aiming at the design requirement of electrostatic discharge safety in a pure oxygen environment, an electrostatic discharge test system in the pure oxygen environment is constructed, the influence of oxygen on the electrostatic ignition property of the material can be checked, and the minimum electrostatic ignition energy of the material in a high-concentration oxygen environment and in different oxygen air pressure environments is measured;
2. aiming at the requirement that multiple times and multiple groups of samples are required for carrying out the minimum ignition energy test of the material, a sample replacing device is arranged in a pure oxygen environment discharge box in order to avoid frequent damage of the replaced samples to the constructed high-concentration oxygen gas environment. After the pure oxygen environment is established, the sample is replaced by the remote control sample replacement device, so that multiple discharge tests can be realized.
Through the device, a high-oxygen-concentration gas environment can be constructed, electrostatic discharge tests of related materials are carried out in the high-oxygen-concentration gas environment, and the sample replacement mechanism is utilized to carry out multiple electrostatic discharge ignition tests under the condition that the gas environment in the box is not damaged, so that the minimum ignition energy of the materials is rapidly determined.
The foregoing is illustrative of the present utility model and is not to be construed as limiting thereof, but rather as providing for the use of additional embodiments and advantages of all such modifications, equivalents, improvements and similar to the present utility model are intended to be included within the scope of the present utility model as defined by the appended claims.
Claims (10)
1. A pure oxygen environment material electrostatic discharge ignitability testing device, characterized in that the testing device comprises: the device comprises a pure oxygen environment ignition box, a sample replacement mechanism, a discharge electrode and an in-box environment measurement and control assembly, wherein the sample replacement mechanism, the discharge electrode and the in-box environment measurement and control assembly are fixed in the pure oxygen environment ignition box.
2. The apparatus for testing the electrostatic discharge ignitability of a material in a pure oxygen environment according to claim 1, wherein said pure oxygen environment ignition chamber comprises a pure oxygen environment ignition chamber body and a pure oxygen ignition chamber door openably connected to said pure oxygen environment ignition chamber body.
3. The device for testing the electrostatic discharge ignition performance of a pure oxygen environment material according to claim 1, wherein the sample replacing mechanism comprises a mechanism bracket, a motor fixed on the mechanism bracket, a coupler in transmission connection with the motor, a turntable table board connected with the coupler, and a conductive slip ring connected with the table board.
4. A pure oxygen environment material electrostatic discharge ignitability test apparatus as defined in claim 3, wherein said turntable surface comprises a plurality of sample bases.
5. The apparatus of claim 4, wherein the sample base is a cylindrical metal body with binding grooves.
6. The apparatus for testing the electrostatic discharge ignitability of a pure oxygen environment material of claim 1, wherein said in-box environment measuring and controlling assembly comprises: the high-voltage discharge system is connected with the discharge electrode, the exhaust equipment is communicated with the pure oxygen environment ignition box, the sensor component is fixed inside the pure oxygen environment ignition box, the air supply pipeline is communicated with the pure oxygen environment ignition box, and the display control system is used for controlling the display of the pure oxygen environment ignition box; the display control system is connected with the exhaust equipment, the sensor component and the air supply pipeline.
7. The device for testing the electrostatic discharge ignitability of a pure oxygen environment material of claim 6, wherein said in-box environment measurement and control assembly further comprises a temperature and humidity regulator fixed inside said pure oxygen environment ignition box and electrically connected to said display control system.
8. The device for testing the electrostatic discharge ignitability of a pure oxygen environment material of claim 6, wherein said sensor assembly comprises a temperature and humidity sensor and an oxygen concentration sensor.
9. The apparatus for testing the electrostatic discharge ignitability of a pure oxygen environment material of claim 6, wherein said gas supply line comprises a carbon dioxide gas supply tube and a pure oxygen gas supply tube.
10. The device for testing the electrostatic discharge ignitability of a pure oxygen environment material of claim 9, wherein the nozzle of said carbon dioxide gas supply tube is disposed at one side of the material to be tested.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202223586257.9U CN219266162U (en) | 2022-12-30 | 2022-12-30 | Pure oxygen environment material electrostatic discharge ignition test device |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202223586257.9U CN219266162U (en) | 2022-12-30 | 2022-12-30 | Pure oxygen environment material electrostatic discharge ignition test device |
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| Publication Number | Publication Date |
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| CN219266162U true CN219266162U (en) | 2023-06-27 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN202223586257.9U Active CN219266162U (en) | 2022-12-30 | 2022-12-30 | Pure oxygen environment material electrostatic discharge ignition test device |
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| CN (1) | CN219266162U (en) |
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- 2022-12-30 CN CN202223586257.9U patent/CN219266162U/en active Active
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