CN104730382A - Device and method for detecting anti-explosion performance of electromagnetic radiation electric equipment - Google Patents

Device and method for detecting anti-explosion performance of electromagnetic radiation electric equipment Download PDF

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Publication number
CN104730382A
CN104730382A CN201510096885.4A CN201510096885A CN104730382A CN 104730382 A CN104730382 A CN 104730382A CN 201510096885 A CN201510096885 A CN 201510096885A CN 104730382 A CN104730382 A CN 104730382A
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China
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electromagnetic radiation
matching network
output matching
test apparatus
explosion
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CN201510096885.4A
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CN104730382B (en
Inventor
王新华
李世光
朱林
陈志明
黄莹
封昌盛
张迎新
徐伟巍
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Guangzhou Academy of Special Equipment Inspection and Testing
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Guangzhou Academy of Special Equipment Inspection and Testing
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Abstract

The invention discloses a device and method for detecting the anti-explosion performance of electromagnetic radiation electric equipment. The device comprises a shielding box, calibrating equipment, a receiving antenna, a waveguide pipe, an output matching network, a spark test device and oscilloscopes, wherein the calibrating equipment, the receiving antenna, the waveguide pipe and the output matching network are all arranged in the shielding box, the calibrating equipment and equipment to be detected are arranged at one end of the shielding box, the output matching network is arranged at the other end of the shielding box, the receiving antenna receives electromagnetic radiation emitted by the equipment to be detected and inputs the electromagnetic radiation to the output matching network through the waveguide pipe, the spark test device is connected in a loop of the output matching network in series and arranged outside the shielding box, and the oscilloscope are connected with the two ends of the spark test device in parallel. The device and method for detecting the anti-explosion performance of the electromagnetic radiation electric equipment are simple in implementation mode, capable of detecting the electromagnetic radiation electric equipment effectively in time, high in safety and capable of being widely applied to the field of anti-explosion performance detection of the electromagnetic radiation electric equipment.

Description

For detecting the device and method of the explosion-proof performance of electromagnetic radiation class electrical equipment
Technical field
The present invention relates to the explosion-proof performance detection field of electrical equipment, particularly a kind of device and method of the explosion-proof performance for detecting electromagnetic radiation class electrical equipment.
Background technology
In colliery, the commercial production of the industry such as chemical industry, oil or combustion gas or processing site, inevitably there is flammable explosive gas, once run into the ignition energy of the explosive inflammable gas that enough ignites, will certainly security incident be caused, therefore have strict safety anti-explosive requirement in these occasions.Present stage is along with the extensive promotion and application of electromagnetic wave new technology, much equipment all may produce electromagnetic radiation high frequency, these equipment also create unpredictable potential safety hazard while performance technological merit, in order to ensure the safety in production of hazardous environment better, need to carry out explosion-proof detection to electromagnetic radiation class electric product in hazardous gas environment.But carry out explosion-proof detection to equipment at present mostly only to detect for the blast caused by electric spark and hot surface, the detection of the combustible blast caused for electromagnetic radiation high-frequency discharge is not deeply carried out, and cannot carry out explosion-proof detection timely and effectively to the electrical equipment of electromagnetic radiation high-frequency discharge.
Summary of the invention
In order to solve above-mentioned technical matters, the object of this invention is to provide a kind of device of the explosion-proof performance for detecting electromagnetic radiation class electrical equipment.Another object of the present invention is to provide a kind of method of the explosion-proof performance for detecting electromagnetic radiation class electrical equipment.
The technical solution adopted for the present invention to solve the technical problems is:
For detecting the device of the explosion-proof performance of electromagnetic radiation class electrical equipment, comprise shielded box, correcting device, receiving antenna, waveguide, output matching network, spark test apparatus and oscillograph, described correcting device, receiving antenna, waveguide and output matching network are all arranged in shielded box, described correcting device and Devices to test are arranged on one end of shielded box, described output matching network is arranged on the other end of shielded box, after the electromagnetic radiation that described receiving antenna reception Devices to test sends, output matching network is input to by waveguide, described spark test apparatus to be connected in the loop of output matching network and to be arranged on outside shielded box, described oscillograph is connected in parallel on the two ends of spark test apparatus.
Further, described output matching network is series resonance-type or Parallel Resonant.
Further, described output matching network comprises controllable impedance, tunable capacitor and adjustable resistance, one end of described controllable impedance is all connected with receiving antenna by waveguide with one end of tunable capacitor, and the other end of described controllable impedance is connected with the other end of tunable capacitor by adjustable resistance and spark test apparatus successively.
Further, described spark test apparatus comprises tungsten filament, pole is held and cadmium dish, and the surface of described cadmium dish is provided with multiple raised tip.
Further, described tungsten filament is connected with the positive and negative output terminal of output matching network respectively with the external link of cadmium dish.
Further, described correcting device adopts power generator, and described waveguide adopts hollow and the metal catheter of inner wall smooth or hollow and interior metallized pipe.
The present invention solves another technical scheme that its technical matters adopts:
The method of the explosion-proof performance for detecting electromagnetic radiation class electrical equipment of the device described in employing, comprising:
S1, be positioned in shielded box by Devices to test, power to Devices to test makes it normally work simultaneously;
S2, receive the high frequency electromagnetic radiation ripple that sends of Devices to test by receiving antenna after by waveguide, high frequency electromagnetic radiation ripple is sent to output matching network;
S3, regulation output matching network, the fundamental voltage amplitude of the waveform of observation oscilloscope display in real time simultaneously, when maximum point appears in fundamental voltage amplitude, stops regulating;
S4, input flammable mixed gas in spark test apparatus, start spark test apparatus simultaneously and make its flashing.
Further, sensitivity technique step is also comprised:
Start spark test apparatus and make its flashing, input flammable mixed gas in spark test apparatus simultaneously, then according to the classification of Devices to test, the output power of correcting device be adjusted to the most ceiling value of standard-required and the output frequency of correcting device be adjusted to consistent with Devices to test, and then observing spark test apparatus whether action.
The invention has the beneficial effects as follows: the device of the explosion-proof performance for detecting electromagnetic radiation class electrical equipment of the present invention, comprise shielded box, correcting device, receiving antenna, waveguide, output matching network, spark test apparatus and oscillograph, described correcting device, receiving antenna, waveguide and output matching network are all arranged in shielded box, correcting device and Devices to test are arranged on one end of shielded box, output matching network is arranged on the other end of shielded box, after the electromagnetic radiation that receiving antenna reception Devices to test sends, output matching network is input to by waveguide, spark test apparatus to be connected in the loop of output matching network and to be arranged on outside shielded box, oscillograph is connected in parallel on the two ends of spark test apparatus.The electromagnetic radiation source resonance that this device can make itself and Devices to test produce by regulation output matching network, thus adopt the spark test apparatus simulation be connected in output matching network to produce the high-frequency spark of the electromagnetic radiation that Devices to test produces, therefore can by judging that the explosive event of this high-frequency spark in spark test apparatus detects this Devices to test and whether be applicable to dangerous place with a potential explosion, this device implementation is simple, can detect electromagnetic radiation class electrical equipment in time, effectively, and security is high.
Another beneficial effect of the present invention is: the method for the explosion-proof performance for detecting electromagnetic radiation class electrical equipment of the present invention, comprising: S1, be positioned in shielded box by Devices to test, and power to Devices to test makes it normally work simultaneously; S2, receive the high frequency electromagnetic radiation ripple that sends of Devices to test by receiving antenna after by waveguide, high frequency electromagnetic radiation ripple is sent to output matching network; S3, regulation output matching network, the fundamental voltage amplitude of the waveform of observation oscilloscope display in real time simultaneously, when maximum point appears in fundamental voltage amplitude, stops regulating; S4, input flammable mixed gas in spark test apparatus, start spark test apparatus simultaneously and make its flashing.The electromagnetic radiation source resonance that this method makes itself and Devices to test produce by regulation output matching network, thus adopt spark test apparatus simulation to produce the high-frequency spark of the electromagnetic radiation that Devices to test produces, therefore can by judging that the explosive event of this high-frequency spark in spark test apparatus detects this Devices to test and whether be applicable to dangerous place with a potential explosion, this method implementation is simple, can detect electromagnetic radiation class electrical equipment in time, effectively, and security is high.
Accompanying drawing explanation
Below in conjunction with drawings and Examples, the invention will be further described.
Fig. 1 is the structural representation of the device of the explosion-proof performance for detecting electromagnetic radiation class electrical equipment of the present invention;
Fig. 2 is the structural drawing of the spark test apparatus of the device of the explosion-proof performance for detecting electromagnetic radiation class electrical equipment of the present invention;
Fig. 3 is the tungsten filament of the spark test apparatus of Fig. 2, structural representation between cadmium dish is held in pole;
Fig. 4 is the radio frequency valve power table of comparisons of foundation when adopting correcting device to calibrate;
Fig. 5 is the radio frequency valve energy table of comparisons of foundation when adopting correcting device to calibrate.
Embodiment
It should be noted that, when not conflicting, the embodiment in the application and the feature in embodiment can combine mutually.
Embodiment one
With reference to Fig. 1, the invention provides a kind of device of the explosion-proof performance for detecting electromagnetic radiation class electrical equipment, comprise shielded box 31, correcting device 32, receiving antenna 34, waveguide 35, output matching network 36, spark test apparatus 40 and oscillograph 41, correcting device 32, receiving antenna 34, waveguide 35 and output matching network 36 are all arranged in shielded box 31, correcting device 32 and Devices to test 33 are arranged on one end of shielded box 31, output matching network 36 is arranged on the other end of shielded box 31, after receiving antenna 34 receives the electromagnetic radiation that Devices to test 33 sends, output matching network 36 is input to by waveguide 35, spark test apparatus 40 to be connected in the loop of output matching network 36 and to be arranged on outside shielded box 31, oscillograph 41 is connected in parallel on the two ends of spark test apparatus 40.
Preferably, output matching network 36 is series resonance-type or Parallel Resonant.Shown in Fig. 1 is the output matching network 36 of series resonance-type, comprise controllable impedance 37, tunable capacitor 38 and adjustable resistance 39, one end of controllable impedance 37 is all connected with receiving antenna 34 by waveguide 35 with one end of tunable capacitor 38, and the other end of controllable impedance 37 is connected with the other end of tunable capacitor 38 by adjustable resistance 39 and spark test apparatus 40 successively.The Principles of Regulation of the output matching network 36 of series resonance-type are as follows:
Z ( 2 πf · j ) = R + j ( 2 πfL - 1 2 πfC ) = R + jX
Z eq＝R eq+jX eq
Make: R=R eq, X=-X eq;
In above formula, f is frequency of electromagnetic radiation, Z eqfor the impedance of high frequency electromagnetic radiation equivalence, R represents the resistance of adjustable resistance, and L represents the inductance value of controllable impedance, and C represents the capacitance of tunable capacitor, and Req represents high frequency electromagnetic radiation equivalent resistance, and Xeq represents high frequency electromagnetic radiation equivalent reactance;
Similar, the Principles of Regulation of the output matching network 36 of Parallel Resonant are as follows:
Y ( 2 πf · j ) = G + j ( 2 πfC - 1 2 πfL ) = G + jB
Y eq＝G eq+jB eq
Make: G=G eq, B=-B eq;
In above formula, f is frequency of electromagnetic radiation, Y eqfor the admittance of high frequency electromagnetic radiation equivalence, R represents the resistance of adjustable resistance, and L represents the inductance value of controllable impedance, and C represents the capacitance of tunable capacitor, and Geq represents high frequency electromagnetic radiation equivalent admittance, and Beq represents high frequency electromagnetic radiation equivalent susceptance;
Preferably, with reference to Fig. 2, in the present embodiment, spark test apparatus 40 comprises tungsten filament 7,8 and cadmium dish 13 are held in pole, and with reference to Fig. 3, the surface of cadmium dish 13 is provided with multiple raised tip, and namely cadmium dish 13 is rat structure.Tungsten filament 7, pole hold 8 and the impedance of ignition circuit that forms of cadmium dish 13 be 50 ohm.
Concrete, as shown in Figure 2, spark test apparatus 40 comprises shell, insulcrete 1, electric current access terminal 2, insulated bolt 3, insulated support 4, outlet pipe 5, base plate 6, tungsten filament 7, pole hold 8, the dragging motor 18 of clamping screw 9, bearing plate 10, clamp 11, test cover 12, cadmium dish 13, rubber gasket 14, admission line 15, transmission gear 16, insulation unitor 17 and band speed reduction unit;
Insulcrete 1 and base plate 6 are installed on shell, insulcrete 1 to be arranged on below base plate 6 and to form a spatial accommodation with base plate 6, transmission gear 16 to be arranged on insulcrete 1 and to be connected with dragging motor 18 by insulation unitor 17, two rotation axiss of transmission gear 16 hold with pole respectively after being each passed through two insulated supports 4 be arranged on base plate 68 and cadmium dish 13 be connected, each rotation axis of transmission gear 16 accesses terminal 2 respectively and to be connected and electric current accesses terminal 2 is arranged on insulcrete 1 by insulated bolt 3 with an electric current, tungsten filament 7 is fixed on pole and holds on 8, the external link of tungsten filament 7 and cadmium dish 13 respectively with output matching network 36 just, negative output terminal connects, electric current access terminal 2 is for accessing power supply thus driving transmission gear 16,
Test cover 12 to be arranged on base plate 6 by rubber gasket 14 and to form a spark-testing space with base plate 6, tungsten filament 7, pole hold 8 and cadmium dish 13 be all arranged in this spark-testing space, outlet pipe 5 and admission line 15 are all through stretching in spark-testing space after spatial accommodation, and clamp 11 to be arranged on shell and to be arranged on above test cover 12 by clamping screw 9 and bearing plate 10;
Transmission gear 16 for drive pole hold 8 and cadmium dish 13 jointly rotate and tungsten filament 7 and cadmium dish 13 rubbed produce electric spark.The electric spark produced may be used for the spark that mimic channel produces, and judges whether this spark causes flammable Mixed Gases Explosion, is equivalent to judge whether the electromagnetic radiation high-frequency discharge spark of Devices to test 33 can cause flammable Mixed Gases Explosion.
Tungsten filament 7 is connected with the positive and negative output terminal of output matching network 36 respectively with the external link of cadmium dish 13.
In the present embodiment, correcting device 32 adopts power generator, for the sensitivity of calibrating installation.Adopt the method for the sensitivity of correcting device 32 calibrating installation as follows: the radio frequency valve power provided according to Fig. 4 and Fig. 5 and radio frequency valve energy limit value, according to Devices to test 33 the classification that is suitable for, determine most firing frequency valve power or the radio frequency valve energy of correcting device 32, the correcting device 32 i.e. output frequency of power generator is adjusted to consistent with Devices to test 33, the output power of correcting device 32 is adjusted to the most ceiling value of standard-required simultaneously, and then observes spark test apparatus 40 whether action.
Waveguide 35 adopts hollow and the metal catheter of inner wall smooth or hollow and interior metallized pipe.Pulse signal, for transmitting high frequency electromagnetic radiation ripple, can be sent to destination with minimum loss by waveguide 35.
Oscillograph 41 adopts ondograph, its effect is the ceiling capacity working point determining Devices to test 33, during use, the fundamental voltage amplitude of the waveform that observation oscilloscope 41 shows, when maximum point appears in fundamental voltage amplitude, represent that the electromagnetic radiation source that output matching network 36 and Devices to test 33 produce there occurs resonance.
Embodiment two
Adopting a method for the explosion-proof performance for detecting electromagnetic radiation class electrical equipment of the device of embodiment one, comprising:
S1, Devices to test 33 is positioned in shielded box 31, makes it normally work to Devices to test 33 power supply simultaneously;
S2, to be received high frequency electromagnetic radiation ripple that Devices to test 33 sends by receiving antenna 34 after by waveguide 35, high frequency electromagnetic radiation ripple is sent to output matching network 36;
S3, regulation output matching network 36, the fundamental voltage amplitude of the waveform of observation oscilloscope 41 display in real time simultaneously, when maximum point appears in fundamental voltage amplitude, stops regulating;
Output matching network 36 is series resonance-type or Parallel Resonant, and according to the output matching network 36 of the series resonance-type in Fig. 1, the Principles of Regulation of its foundation are as follows:
Z ( 2 πf · j ) = R + j ( 2 πfL - 1 2 πfC ) = R + jX
Z eq＝R eq+jX eq
Make: R=R eq, X=-X eq;
In above formula, f is frequency of electromagnetic radiation, Z eqfor the impedance of high frequency electromagnetic radiation equivalence, R represents the resistance of adjustable resistance, and L represents the inductance value of controllable impedance, and C represents the capacitance of tunable capacitor, and Req represents high frequency electromagnetic radiation equivalent resistance, and Xeq represents high frequency electromagnetic radiation equivalent reactance;
Similar, according to the output matching network 36 of Parallel Resonant, the Principles of Regulation of its foundation are as follows:
Y ( 2 πf · j ) = G + j ( 2 πfC - 1 2 πfL ) = G + jB
Y eq＝G eq+jB eq
Make: G=G eq, B=-B eq;
In above formula, f is frequency of electromagnetic radiation, Y eqfor the admittance of high frequency electromagnetic radiation equivalence, R represents the resistance of adjustable resistance, and L represents the inductance value of controllable impedance, and C represents the capacitance of tunable capacitor, and Geq represents high frequency electromagnetic radiation equivalent admittance, and Beq represents high frequency electromagnetic radiation equivalent susceptance;
S4, input flammable mixed gas in spark test apparatus 40, start spark test apparatus 40 simultaneously and make its flashing.Spark test apparatus 40 is connected in output matching network 36, its effect is whether the energy that the electromagnetic radiation ceiling capacity working point detecting Devices to test 33 exports can light flammable mixed gas, by observing spark test apparatus 40 whether action, whether the explosion-proof performance finally passing judgment on out this equipment under test meets the requirements.
This method, before step S1, also comprises sensitivity technique step:
Start spark test apparatus 40 and make its flashing, input flammable mixed gas in spark test apparatus 40 simultaneously, then with reference to Fig. 4 and Fig. 5, according to the classification of Devices to test 33, the output power of correcting device 32 be adjusted to the most ceiling value of standard-required and the output frequency of correcting device 32 be adjusted to consistent with Devices to test 33, and then observing spark test apparatus 40 whether action.Here be the verification for spark test apparatus sensitivity, only under the test parameters of standard-required, the spark test apparatus of meeting action message is only sensitive, and therefore subsequent test findings is just credible.
More than that better enforcement of the present invention is illustrated, but the invention is not limited to embodiment, those of ordinary skill in the art also can make all equivalent variations or replacement under the prerequisite without prejudice to spirit of the present invention, and these equivalent modification or replacement are all included in the application's claim limited range.

Claims (8)

1. for detecting the device of the explosion-proof performance of electromagnetic radiation class electrical equipment, it is characterized in that, comprise shielded box (31), correcting device (32), receiving antenna (34), waveguide (35), output matching network (36), spark test apparatus (40) and oscillograph (41), described correcting device (32), receiving antenna (34), waveguide (35) and output matching network (36) are all arranged in shielded box (31), described correcting device (32) and Devices to test (33) are arranged on one end of shielded box (31), described output matching network (36) is arranged on the other end of shielded box (31), after the electromagnetic radiation that described receiving antenna (34) reception Devices to test (33) sends, output matching network (36) is input to by waveguide (35), described spark test apparatus (40) to be connected in the loop of output matching network (36) and to be arranged on shielded box (31) outward, described oscillograph (41) is connected in parallel on the two ends of spark test apparatus (40).
2. the device of the explosion-proof performance for detecting electromagnetic radiation class electrical equipment according to claim 1, is characterized in that, described output matching network (36) is series resonance-type or Parallel Resonant.
3. the device of the explosion-proof performance for detecting electromagnetic radiation class electrical equipment according to claim 1, it is characterized in that, described output matching network (36) comprises controllable impedance (37), tunable capacitor (38) and adjustable resistance (39), one end of described controllable impedance (37) is all connected with receiving antenna (34) by waveguide (35) with one end of tunable capacitor (38), and the other end of described controllable impedance (37) is connected with the other end of tunable capacitor (38) by adjustable resistance (39) and spark test apparatus (40) successively.
4. the device of the explosion-proof performance for detecting electromagnetic radiation class electrical equipment according to claim 1, it is characterized in that, described spark test apparatus (40) comprises tungsten filament (7), (8) and cadmium dish (13) are held in pole, and the surface of described cadmium dish (13) is provided with multiple raised tip.
5. the device of the explosion-proof performance for detecting electromagnetic radiation class electrical equipment according to claim 4, is characterized in that, described tungsten filament (7) is connected with the positive and negative output terminal of output matching network (36) respectively with the external link of cadmium dish (13).
6. the device of the explosion-proof performance for detecting electromagnetic radiation class electrical equipment according to claim 1, it is characterized in that, described correcting device (32) adopts power generator, and described waveguide (35) adopts hollow and the metal catheter of inner wall smooth or hollow and interior metallized pipe.
7. adopting the method for the explosion-proof performance for detecting electromagnetic radiation class electrical equipment of the device according to any one of claim 1 to 6, it is characterized in that, comprise:
S1, Devices to test (33) is positioned in shielded box (31), makes it normally work to Devices to test (33) power supply simultaneously;
S2, receive Devices to test (33) the high frequency electromagnetic radiation ripple that sends by receiving antenna (34) after by waveguide (35), high frequency electromagnetic radiation ripple is sent to output matching network (36);
S3, regulation output matching network (36), the simultaneously fundamental voltage amplitude of waveform that shows of observation oscilloscope (41) in real time, when maximum point appears in fundamental voltage amplitude, stop regulating;
S4, input flammable mixed gas in spark test apparatus (40), start spark test apparatus (40) simultaneously and make its flashing.
8. the device and method of the explosion-proof performance for detecting electromagnetic radiation class electrical equipment according to claim 7, is characterized in that, also comprise sensitivity technique step:
Start spark test apparatus (40) and make its flashing, input flammable mixed gas in spark test apparatus (40) simultaneously, then according to the classification of Devices to test (33), the output power of correcting device (32) be adjusted to the most ceiling value of standard-required and the output frequency of correcting device (32) be adjusted to consistent with Devices to test (33), and then observing spark test apparatus (40) whether action.
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CN112269111A (en) * 2020-12-10 2021-01-26 矿冶科技集团有限公司 Electric spark simulation system and method and electronic device
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CN112762981A (en) * 2020-12-30 2021-05-07 江苏健安安全科技有限公司 Explosion-proof evaluation system of power equipment
CN115862274A (en) * 2023-03-03 2023-03-28 安标国家矿用产品安全标志中心有限公司 Multi-band radio frequency electromagnetic energy explosion-proof ignition test device and method
CN115967452A (en) * 2023-03-16 2023-04-14 安标国家矿用产品安全标志中心有限公司 Radio frequency electromagnetic energy explosion-proof ignition test device and method
CN115967452B (en) * 2023-03-16 2023-05-16 安标国家矿用产品安全标志中心有限公司 Radio frequency electromagnetic energy explosion-proof ignition test device and method

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