CN104535113A - Electric heating tube testing device and method - Google Patents
Electric heating tube testing device and method Download PDFInfo
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- CN104535113A CN104535113A CN201410843356.1A CN201410843356A CN104535113A CN 104535113 A CN104535113 A CN 104535113A CN 201410843356 A CN201410843356 A CN 201410843356A CN 104535113 A CN104535113 A CN 104535113A
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Abstract
The invention aims at providing an electric heating tube testing device and method. The electric heating tube testing device and method are used for comprehensively and reliably testing the safety performance of electric heating tubes. The electric heating tube testing device comprises a metal testing barrel with a movable barrel cover. The upper portion of the testing barrel is connected with a liquid inlet pipe and an air exhaust pipe. The liquid inlet pipe is provided with a liquid inlet valve. The air exhaust pipe is provided with an air exhaust valve. The lower portion of the testing barrel is provided with a liquid outlet pipe and an air inlet pipe. The liquid outlet pipe is provided with a liquid outlet valve. The air inlet pipe is provided with an air inlet valve. The testing barrel is connected with an air pressure gauge, a hydraulic pressure gauge and a temperature gauge through pipelines. The barrel body of the testing barrel is connected with an earth terminal through a wire. The testing barrel is provided with a testing terminal communicated with the interior and the exterior of the testing barrel. The electric heating tube testing device is applicable to testing of various electric heating tubes, the electric heating tube testing method is convenient to implement, reliable and reliable, and factory testing of the electric heating tubes can be achieved.
Description
Technical field
The invention belongs to electrothermal tube technical field of measurement and test, be specifically related to a kind of electrothermal tube proving installation and method of testing thereof.
Background technology
Electrothermal tube (tubular electrothermal element) take metal tube as shell (comprising stainless steel, copper tube), along central shaft in pipe to distributing auger lectrothermal alloy wire (nickel chromium triangle, ferrochrome), its fill gaps compacting has the magnesium oxide sand of good insulation heat conductivility, mouth of pipe two ends silica gel sealing, this electrothermal tube can add hot-air, metal die and various liquid.
The kind of current electrothermal tube is more, but does not also have a kind of comprehensive test device that can carry out Validity Test to electrothermal tube security performance.Method and the corresponding drawback of the test of current electrothermal tube security performance are as follows: when 1, surveying hydraulic pressure, electrothermal tube product is contained on electric heater, carries out the pressure testing of daily water swivel boiling water, have have water-tightly just checked and accepted, testing its safety index; When 2, surveying 100 DEG C of water temperatures, electrothermal tube is placed on common container, and the safety index of test is generally all tested between 95 DEG C ~ 99 DEG C, its data are inaccurate, and because of container blow-by, the water surface and air contact surfaces amass larger, heat uninterruptedly loses, and cannot reach 100 DEG C of coolant-temperature gage tests; 3, do not adopt constant test way during oil temperature test, adopt water filling to heat test; Test without employing packoff when 4, surveying air pressure.
Summary of the invention
The object of the invention is to propose a kind of electrothermal tube proving installation and method of testing thereof, carry out testing for electrothermal tube security performance comprehensively, reliably.
Electrothermal tube proving installation of the present invention comprises the metallic test cylinder that has movable cover, and the top of described test barrel is connected with feed tube and gas outlet, and described feed tube is provided with liquid feed valve, and described gas outlet is provided with vent valve; The bottom of test barrel is provided with discharging tube and draft tube, and described discharging tube is provided with tapping valve, and described draft tube is provided with gas admittance valve; Described test barrel is connected with rain glass, hydralic pressure gauge, thermometer by pipeline, and the cylindrical shell of test barrel is connected with ground terminal by wire, and test barrel is provided with the calibrating terminal be communicated with inside and outside test barrel.
Further, be convenient test, described calibrating terminal comprises proof voltage calibrating terminal and leakage current testing terminal.
Further, for convenience of injecting air in test barrel, described draft tube is connected with air compressor.
Further, for convenience of injecting the required liquid of test in test barrel, described feed tube is connected with water pump.
Apply the electrothermal tube method of testing of above-mentioned electrothermal tube proving installation, comprise water pressure resistance test, air pressure resistance test, high temperature resistant test, normality test and leakage current testing; Wherein:
The step of water pressure resistance test is as follows: open cover, be put in test barrel by electrothermal tube to be measured, closes cover; Gas admittance valve, vent valve, tapping valve are closed, opens liquid feed valve, water filling in test barrel, utilize the hydraulic pressure in hydralic pressure gauge monitor test cylinder, close liquid feed valve when hydraulic pressure reaches predetermined pressure; After leaving standstill the schedule time, open tapping valve to discharge the water in test barrel, open cover, take out electrothermal tube to be measured, if crackle does not appear in electrothermal tube surface, represent that electrothermal tube is qualified, electrothermal tube surface occurs that crackle then represents that electrothermal tube is defective.
Air pressure resistance testing procedure is as follows: open cover, is put in test barrel by electrothermal tube to be measured, closes cover; By liquid feed valve, tapping valve, exhaust valve closure, open gas admittance valve, inflate in test barrel, utilize the air pressure in rain glass monitor test cylinder, close gas admittance valve when air pressure reaches predetermined pressure; After leaving standstill the schedule time, open vent valve and cover, take out electrothermal tube to be measured, if crackle does not appear in electrothermal tube surface, represent that electrothermal tube is qualified, electrothermal tube surface occurs that crackle then represents that electrothermal tube is defective.
High temperature resistant testing procedure is as follows: open cover, the electrothermal tube to be measured being connected to power supply is put in test barrel, the power end of one end of calibrating terminal with electrothermal tube to be measured is connected, the other end is connected with withstands voltage tester, the earth terminal of withstands voltage tester is connected with the ground terminal of test barrel, closes cover; Tapping valve and gas admittance valve are closed, opens liquid feed valve and vent valve, in test barrel, inject silicone oil, then with closing liquid feed valve and vent valve; Connect the power supply of electrothermal tube, electrothermal tube is generated heat, and utilizes the temperature of silicone oil in thermometer monitoring and test cylinder, after the temperature of silicone oil reaches predetermined temperature in test barrel, close the power supply of electrothermal tube; Make withstands voltage tester export predetermined voltage and keep the schedule time, finally close withstands voltage tester, take out electrothermal tube, if electrothermal tube does not puncture, represent that electrothermal tube is qualified, electrothermal tube occurs that puncturing warning then represents that electrothermal tube is defective.
Normality testing procedure is as follows: open cover, the electrothermal tube to be measured being connected to power supply is put in test barrel, the power end of one end of calibrating terminal with electrothermal tube to be measured is connected, the other end is connected with withstands voltage tester, the earth terminal of withstands voltage tester is connected with the ground terminal of test barrel, closes cover; Liquid feed valve, tapping valve and gas admittance valve are closed, opens vent valve; Connect the power supply of electrothermal tube, electrothermal tube is generated heat, and utilizes the temperature of air in thermometer monitoring and test cylinder, after the temperature of air reaches predetermined temperature in test barrel, close the power supply of electrothermal tube; Make withstands voltage tester export predetermined voltage keep the schedule time, finally close withstands voltage tester, take out electrothermal tube, if electrothermal tube does not puncture, represent that electrothermal tube is qualified, electrothermal tube occurs puncturing and then represents that electrothermal tube is defective.
Leakage current testing step is as follows: open cover, the electrothermal tube to be measured being connected to power supply is put in test barrel, the body of one end of calibrating terminal with electrothermal tube to be measured is connected, the other end is connected with leakage current tester, the earth terminal of leakage current tester is connected with the ground terminal of test barrel, closes cover; Tapping valve and gas admittance valve are closed, opens liquid feed valve and vent valve, in test barrel, inject silicone oil, then with closing liquid feed valve and vent valve; Connect the power supply of electrothermal tube, electrothermal tube is generated heat, and utilize the temperature of silicone oil in thermometer monitoring and test cylinder, after the temperature of silicone oil in test barrel reaches predetermined temperature and is stable, carry out leakage current testing, if leakage current tester is not reported to the police in above process, represent that electrothermal tube is qualified, leakage current tester occurs reporting to the police and then represents that electrothermal tube is defective; Finally close the power supply of electrothermal tube.
The test of the applicable various electrothermal tube of electrothermal tube proving installation of the present invention, its method of testing is convenient, reliable, accurate, can meet the factory testing of electrothermal tube.
Accompanying drawing explanation
Fig. 1 is the structural representation of electrothermal tube proving installation of the present invention.
Accompanying drawing indicates: 1, test barrel; 2, feed tube; 3, gas outlet; 4, liquid feed valve; 5, vent valve; 6, discharging tube; 7, draft tube; 8, tapping valve; 9, gas admittance valve; 10, rain glass; 11, hydralic pressure gauge; 12, thermometer; 13, ground terminal; 14, proof voltage calibrating terminal; 15, leakage current testing terminal; 16, air compressor; 17, water pump.
Embodiment
Contrast accompanying drawing below, by the description to embodiment, the effect and principle of work etc. of the specific embodiment of the present invention as the mutual alignment between the shape of involved each component, structure, each several part and annexation, each several part are described in further detail.
Embodiment 1:
As shown in the figure (cover not shown in FIG.), the electrothermal tube proving installation of the present embodiment comprises the metallic test cylinder 1 that has movable cover, the top of described test barrel 1 is connected with feed tube 2 and gas outlet 3, and described feed tube 2 is provided with liquid feed valve 4, and described gas outlet 3 is provided with vent valve 5; The bottom of test barrel 1 is provided with discharging tube 6 and draft tube 7, and described discharging tube 6 is provided with tapping valve 8, and described draft tube 7 is provided with gas admittance valve 9; Described test barrel 1 is connected with rain glass 10, hydralic pressure gauge 11, thermometer 12 by pipeline, and the cylindrical shell of test barrel 1 is connected with ground terminal 13 by wire, and test barrel 1 is provided with and is communicated with proof voltage calibrating terminal 14 inside and outside test barrel 1 and leakage current testing terminal 15.
For convenience of injecting air in test barrel 1, described draft tube 7 is connected with air compressor 16.
For convenience of injecting the required liquid of test in test barrel 1, described feed tube 2 is connected with water pump 17.
Said temperature table 12 can utilize Displaying Meter and thermopair to make, and repeats no more herein.
Apply the electrothermal tube method of testing of above-mentioned electrothermal tube proving installation, comprise water pressure resistance test, air pressure resistance test, high temperature resistant test, normality test and leakage current testing; Wherein:
The step of water pressure resistance test is as follows: open cover, be put in by electrothermal tube to be measured in test barrel 1, closes cover; Gas admittance valve 9, vent valve 5, tapping valve 8 are closed, opens liquid feed valve 4, water filling in test barrel 1, utilize the hydraulic pressure in hydralic pressure gauge 11 monitor test cylinder 1, close liquid feed valve 4 when hydraulic pressure reaches predetermined pressure; After leaving standstill the schedule time, open tapping valve 8 to discharge the water in test barrel 1, open cover, take out electrothermal tube to be measured, if crackle does not appear in electrothermal tube surface, represent that electrothermal tube is qualified, electrothermal tube surface occurs that crackle then represents that electrothermal tube is defective.
Air pressure resistance testing procedure is as follows: open cover, is put in by electrothermal tube to be measured in test barrel 1, closes cover; Liquid feed valve 4, tapping valve 8, vent valve 5 are closed, opens gas admittance valve 9, inflate in test barrel 1, utilize the air pressure in rain glass 10 monitor test cylinder 1, close gas admittance valve 9 when air pressure reaches predetermined pressure; Leave standstill after one hour, open vent valve 5 and cover, take out electrothermal tube to be measured, if crackle does not appear in electrothermal tube surface, represent that electrothermal tube is qualified, electrothermal tube surface occurs that crackle then represents that electrothermal tube is defective.
High temperature resistant testing procedure is as follows: open cover, the electrothermal tube to be measured being connected to power supply is put in test barrel 1, the power end of one end of calibrating terminal with electrothermal tube to be measured is connected, the other end is connected with withstands voltage tester, the earth terminal of withstands voltage tester is connected with the ground terminal 13 of test barrel 1, closes cover; Tapping valve 8 and gas admittance valve 9 are closed, opens liquid feed valve 4 and vent valve 5, in test barrel 1, inject silicone oil, then with closing liquid feed valve 4 and vent valve 5; Connect the power supply of electrothermal tube, electrothermal tube is generated heat, and utilizes the temperature of silicone oil in thermometer 12 monitoring and test cylinder 1, after the temperature of silicone oil reaches predetermined temperature in test barrel 1, close the power supply of electrothermal tube; Make withstands voltage tester export 1250V voltage keep 60 seconds, finally close withstands voltage tester, take out electrothermal tube, if electrothermal tube does not puncture, represent that electrothermal tube is qualified, electrothermal tube occurs puncturing and then represents that electrothermal tube is defective.
Normality testing procedure is as follows: open cover, the electrothermal tube to be measured being connected to power supply is put in test barrel 1, the power end of one end of calibrating terminal with electrothermal tube to be measured is connected, the other end is connected with withstands voltage tester, the earth terminal of withstands voltage tester is connected with the ground terminal 13 of test barrel 1, closes cover; Liquid feed valve 4, tapping valve 8 and gas admittance valve 9 are closed, opens vent valve 5; Connect the power supply of electrothermal tube, electrothermal tube is generated heat, and utilizes the temperature of air in thermometer 12 monitoring and test cylinder 1, after the temperature of air reaches predetermined temperature in test barrel 1, close the power supply of electrothermal tube; Make withstands voltage tester export 1250V voltage keep 60 seconds, finally close withstands voltage tester, take out electrothermal tube, if electrothermal tube does not puncture, represent that electrothermal tube is qualified, electrothermal tube occurs puncturing and then represents that electrothermal tube is defective.
Leakage current testing step is as follows: open cover, the electrothermal tube to be measured being connected to power supply is put in test barrel 1, the body of one end of calibrating terminal with electrothermal tube to be measured is connected, the other end is connected with leakage current tester, the earth terminal of leakage current tester is connected with the ground terminal 13 of test barrel 1, closes cover; Tapping valve 8 and gas admittance valve 9 are closed, opens liquid feed valve 4 and vent valve 5, in test barrel 1, inject silicone oil, then with closing liquid feed valve 4 and vent valve 5; Connect the power supply of electrothermal tube, electrothermal tube is generated heat, and utilize the temperature of silicone oil in thermometer 12 monitoring and test cylinder 1, after the temperature of silicone oil in test barrel 1 reaches predetermined temperature and is stable, carry out leakage current testing, if leakage current tester is not reported to the police in above process, represent that electrothermal tube is qualified, leakage current tester occurs reporting to the police and then represents that electrothermal tube is defective; Finally close the power supply of electrothermal tube.
Claims (9)
1. an electrothermal tube proving installation, it is characterized in that comprising the metallic test cylinder that has movable cover, the top of described test barrel is connected with feed tube and gas outlet, and described feed tube is provided with liquid feed valve, and described gas outlet is provided with vent valve; The bottom of test barrel is provided with discharging tube and draft tube, and described discharging tube is provided with tapping valve, and described draft tube is provided with gas admittance valve; Described test barrel is connected with rain glass, hydralic pressure gauge, thermometer by pipeline, and the cylindrical shell of test barrel is connected with ground terminal by wire, and test barrel is provided with the calibrating terminal be communicated with inside and outside test barrel.
2. electrothermal tube proving installation according to claim 1, is characterized in that described calibrating terminal comprises proof voltage calibrating terminal and leakage current testing terminal.
3. electrothermal tube proving installation according to claim 1 and 2, is characterized in that described draft tube is connected with air compressor.
4. electrothermal tube proving installation according to claim 1 and 2, is characterized in that described feed tube is connected with water pump.
5. application rights requires the electrothermal tube method of testing of electrothermal tube proving installation described in 1, it is characterized in that comprising water pressure resistance test, air pressure resistance test, high temperature resistant test, normality test and leakage current testing, wherein the step of water pressure resistance test is as follows: open cover, electrothermal tube to be measured is put in test barrel, closes cover; Gas admittance valve, vent valve, tapping valve are closed, opens liquid feed valve, water filling in test barrel, utilize the hydraulic pressure in hydralic pressure gauge monitor test cylinder, close liquid feed valve when hydraulic pressure reaches predetermined pressure; After leaving standstill the schedule time, open tapping valve to discharge the water in test barrel, open cover, take out electrothermal tube to be measured, if crackle does not appear in electrothermal tube surface, represent that electrothermal tube is qualified, electrothermal tube surface occurs that crackle then represents that electrothermal tube is defective.
6. electrothermal tube method of testing according to claim 5, is characterized in that described air pressure resistance testing procedure is as follows: open cover, be put in test barrel by electrothermal tube to be measured, closes cover; By liquid feed valve, tapping valve, exhaust valve closure, open gas admittance valve, inflate in test barrel, utilize the air pressure in rain glass monitor test cylinder, close gas admittance valve when air pressure reaches predetermined pressure; After leaving standstill the schedule time, open vent valve and cover, take out electrothermal tube to be measured, if crackle does not appear in electrothermal tube surface, represent that electrothermal tube is qualified, electrothermal tube surface occurs that crackle then represents that electrothermal tube is defective.
7. electrothermal tube method of testing according to claim 5, it is characterized in that described high temperature resistant testing procedure is as follows: open cover, the electrothermal tube to be measured being connected to power supply is put in test barrel, the power end of one end of calibrating terminal with electrothermal tube to be measured is connected, the other end is connected with withstands voltage tester, the earth terminal of withstands voltage tester is connected with the ground terminal of test barrel, closes cover; Tapping valve and gas admittance valve are closed, opens liquid feed valve and vent valve, in test barrel, inject silicone oil, then with closing liquid feed valve and vent valve; Connect the power supply of electrothermal tube, electrothermal tube is generated heat, and utilizes the temperature of silicone oil in thermometer monitoring and test cylinder, after the temperature of silicone oil reaches predetermined temperature in test barrel, close the power supply of electrothermal tube; Make withstands voltage tester export predetermined voltage and keep the schedule time, finally close withstands voltage tester, take out electrothermal tube, if electrothermal tube does not puncture, represent that electrothermal tube is qualified, electrothermal tube occurs that puncturing warning then represents that electrothermal tube is defective.
8. electrothermal tube method of testing according to claim 5, it is characterized in that described normality testing procedure is as follows: open cover, the electrothermal tube to be measured being connected to power supply is put in test barrel, the power end of one end of calibrating terminal with electrothermal tube to be measured is connected, the other end is connected with withstands voltage tester, the earth terminal of withstands voltage tester is connected with the ground terminal of test barrel, closes cover; Liquid feed valve, tapping valve and gas admittance valve are closed, opens vent valve; Connect the power supply of electrothermal tube, electrothermal tube is generated heat, and utilizes the temperature of air in thermometer monitoring and test cylinder, after the temperature of air reaches predetermined temperature in test barrel, close the power supply of electrothermal tube; Make withstands voltage tester export predetermined voltage keep the schedule time, finally close withstands voltage tester, take out electrothermal tube, if electrothermal tube does not puncture, represent that electrothermal tube is qualified, electrothermal tube occurs puncturing and then represents that electrothermal tube is defective.
9. electrothermal tube method of testing according to claim 5, it is characterized in that described leakage current testing step is as follows: open cover, the electrothermal tube to be measured being connected to power supply is put in test barrel, the body of one end of calibrating terminal with electrothermal tube to be measured is connected, the other end is connected with leakage current tester, the earth terminal of leakage current tester is connected with the ground terminal of test barrel, closes cover; Tapping valve and gas admittance valve are closed, opens liquid feed valve and vent valve, in test barrel, inject silicone oil, then with closing liquid feed valve and vent valve; Connect the power supply of electrothermal tube, electrothermal tube is generated heat, and utilize the temperature of silicone oil in thermometer monitoring and test cylinder, after the temperature of silicone oil in test barrel reaches predetermined temperature and is stable, carry out leakage current testing, if leakage current tester is not reported to the police in above process, represent that electrothermal tube is qualified, leakage current tester occurs reporting to the police and then represents that electrothermal tube is defective; Finally close the power supply of electrothermal tube.
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| CN201410843356.1A CN104535113B (en) | 2014-12-30 | 2014-12-30 | Electric heating tube testing method |
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| CN201410843356.1A CN104535113B (en) | 2014-12-30 | 2014-12-30 | Electric heating tube testing method |
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| CN104535113B CN104535113B (en) | 2017-05-03 |
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Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN106885600A (en) * | 2015-12-16 | 2017-06-23 | 江苏顺发电热材料有限公司 | A kind of electrothermal tube performance detection apparatus and its method of work |
| CN109186891A (en) * | 2018-09-14 | 2019-01-11 | 安徽苏立科技股份有限公司 | A kind of heating tube sealing test equipment |
| CN109188141A (en) * | 2018-09-14 | 2019-01-11 | 安徽苏立科技股份有限公司 | A kind of heating tube Multi-function experimental test equipment |
| CN109444569A (en) * | 2018-09-14 | 2019-03-08 | 安徽苏立科技股份有限公司 | A kind of heating tube durability and accelerated life test equipment |
| CN116577595A (en) * | 2023-07-12 | 2023-08-11 | 扬州兴民电器有限公司 | Electrical heating tube performance testing device |
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