CN104535113B - Electric heating tube testing method - Google Patents
Electric heating tube testing method Download PDFInfo
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- CN104535113B CN104535113B CN201410843356.1A CN201410843356A CN104535113B CN 104535113 B CN104535113 B CN 104535113B CN 201410843356 A CN201410843356 A CN 201410843356A CN 104535113 B CN104535113 B CN 104535113B
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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, and in particular to a kind of electrothermal tube method of testing.
Background technology
Electrothermal tube (tubular electrothermal element) is the central shaft along pipe with metal tube as shell (including stainless steel, copper tube)
To distributing auger lectrothermal alloy wire (nickel chromium triangle, ferrochrome), its space padding and compacting has the oxidation of good insulation heat conductivility
Magnesia, mouth of pipe two ends silica gel sealing, this electrothermal tube can add hot-air, metal die and various liquid.
At present the kind of electrothermal tube is more, but can also carry out the comprehensive of Validity Test to electrothermal tube security performance without a kind of
Close test device.The method and corresponding drawback of electrothermal tube security performance test at present is as follows：When the 1st, surveying hydraulic pressure, electrothermal tube product
It is mounted on electric heater, carries out daily tap boiling water pressure testing, it is water-tight just to check and accept, it is no that its safety index is surveyed
Examination；When the 2nd, surveying 100 DEG C of water temperatures, electrothermal tube is placed on common container, the safety index of test it is general all 95 DEG C～99 DEG C it
Between tested, its data is inaccurate, and because of container blow-by, the water surface is larger with air contact area, and heat uninterruptedly loses, nothing
Method reaches 100 DEG C of coolant-temperature gage tests；3rd, constant test method is not adopted when oil temperature is tested, is tested using water filling heating；4th, survey
Without being tested using sealing device during air pressure.
The content of the invention
The purpose of the present invention is to propose to a kind of electrothermal tube method of testing, for electrothermal tube security performance is carried out comprehensively,
Reliable test.
The electrothermal tube test device of the present invention includes a metallic test cylinder with movable cover, the test barrel it is upper
Portion is connected with feed tube and blast pipe, and the feed tube is provided with liquid feed valve, and the blast pipe is provided with air bleeding valve；The bottom of test barrel
Discharging tube and air inlet pipe are provided with, the discharging tube is provided with tapping valve, and the air inlet pipe is provided with intake valve；The test barrel is by pipe
Road is connected with air gauge, hydralic pressure gauge, thermometer, and the cylinder of test barrel is connected with ground terminal by wire, and test barrel is provided with company
Calibrating terminal inside and outside logical test barrel.
Further, it is convenient test, the calibrating terminal includes proof voltage calibrating terminal and leakage current testing terminal.
Further, for convenience of air is injected into test barrel, the air inlet pipe is connected with air compressor.
Further, for convenience of liquid needed for the injection test into test barrel, the feed tube is connected with water pump.
Using the electrothermal tube method of testing of above-mentioned electrothermal tube test device, including water pressure resistance is tested, air pressure resistance is tested, resistance to height
Temperature test, normality test and leakage current testing；Wherein：
The step of water pressure resistance is tested is as follows：Cover is opened, electrothermal tube to be measured is put in test barrel, close cover；To enter
Air valve, air bleeding valve, tapping valve are closed, and open liquid feed valve, and the water filling into test barrel monitors the water in test barrel using hydralic pressure gauge
Pressure, liquid feed valve is closed when hydraulic pressure reaches predetermined pressure；After standing the scheduled time, open tapping valve to discharge in test barrel
Water, opens cover, takes out electrothermal tube to be measured, represents that electrothermal tube is qualified if crackle does not occur in electric heating pipe surface, electrothermal tube table
There is crackle and then represents that electrothermal tube is unqualified in face.
Air pressure resistance testing procedure is as follows：Cover is opened, electrothermal tube to be measured is put in test barrel, close cover；By feed liquor
Valve, tapping valve, exhaust valve closure, open intake valve, inflate into test barrel, and using air gauge the air pressure in test barrel is monitored,
Intake valve is closed when air pressure reaches predetermined pressure；After standing the scheduled time, air bleeding valve and cover are opened, take out electric heating to be measured
Pipe, represents that electrothermal tube is qualified if crackle does not occur in electric heating pipe surface, and electric heating pipe surface crackle occurs and then represents electrothermal tube not
It is qualified.
High temperature resistant testing procedure is as follows：Cover is opened, the electrothermal tube to be measured for being connected to power supply is put in test barrel, will be tested
One end of terminal is connected with the power end of electrothermal tube to be measured, and the other end is connected with proof voltage tester, by proof voltage tester
Earth terminal is connected with the ground terminal of test barrel, closes cover；Tapping valve and intake valve are closed, liquid feed valve and exhaust is opened
Valve, silicone oil is injected into test barrel, then with closing liquid feed valve and air bleeding valve；The power supply of electrothermal tube is connected, makes electrothermal tube generate heat,
And using the temperature of silicone oil in thermometer monitoring and test cylinder, after the temperature of silicone oil in test barrel reaches predetermined temperature, close electricity
The power supply of heat pipe；Make proof voltage tester output predetermined voltage and kept for the scheduled time, finally close proof voltage tester, take out
Electrothermal tube, represents that electrothermal tube is qualified if electrothermal tube does not puncture, and electrothermal tube occurs puncturing warning and then represents that electrothermal tube is unqualified.
Normality testing procedure is as follows：Cover is opened, the electrothermal tube to be measured for being connected to power supply is put in test barrel, by test lead
One end of son is connected with the power end of electrothermal tube to be measured, and the other end is connected with proof voltage tester, by connecing for proof voltage tester
Ground terminal is connected with the ground terminal of test barrel, closes cover；Liquid feed valve, tapping valve and intake valve are closed, air bleeding valve is opened；Connect
The power supply of energization heat pipe, makes electrothermal tube generate heat, and using the temperature of air in thermometer monitoring and test cylinder, when air in test barrel
Temperature reach after predetermined temperature, close electrothermal tube power supply；Make proof voltage tester output predetermined voltage and keep pre- timing
Between, proof voltage tester is finally closed, electrothermal tube is taken out, represent that electrothermal tube is qualified if electrothermal tube does not puncture, electrothermal tube goes out
Now puncture then expression electrothermal tube unqualified.
Leakage current testing step is as follows：Cover is opened, the electrothermal tube to be measured for being connected to power supply is put in test barrel, will be surveyed
One end of examination terminal is connected with the body of electrothermal tube to be measured, and the other end is connected with leakage current tester, will leak out testing current
The earth terminal of instrument is connected with the ground terminal of test barrel, closes cover；Tapping valve and intake valve are closed, liquid feed valve and row is opened
Air valve, silicone oil is injected into test barrel, then with closing liquid feed valve and air bleeding valve；The power supply of electrothermal tube is connected, electrothermal tube is sent out
Heat, and using the temperature of silicone oil in thermometer monitoring and test cylinder, when the temperature of silicone oil in test barrel reaches predetermined temperature and stablizes
Afterwards, leakage current testing is carried out, represents that electrothermal tube is qualified if leakage current tester is not reported to the police in above process, leakage
There is warning and then represents that electrothermal tube is unqualified in current tester；Finally close the power supply of electrothermal tube.
The test of the applicable various electrothermal tubes of electrothermal tube test device of the present invention, its method of testing convenience, reliability, essence
Really, the factory testing of electrothermal tube can be met.
Description of the drawings
Fig. 1 is the structural representation of the electrothermal tube test device of the present invention.
Accompanying drawing is indicated：1st, test barrel；2nd, feed tube；3rd, blast pipe；4th, liquid feed valve；5th, air bleeding valve；6th, discharging tube；7th, air inlet
Pipe；8th, tapping valve；9th, intake valve；10th, air gauge；11st, hydralic pressure gauge；12nd, thermometer；13rd, ground terminal；14th, proof voltage test
Terminal；15th, leakage current testing terminal；16th, air compressor；17th, water pump.
Specific embodiment
It is for example involved each to the specific embodiment of the present invention by the description to embodiment below against accompanying drawing
The shape of component, the mutual alignment between construction, each several part and annexation, the effect of each several part and operation principle etc. are made into one
The detailed description of step.
Embodiment 1：
(cover is not drawn in figure) as shown in the figure, the electrothermal tube test device of the present embodiment includes that has a movable cover
Metallic test cylinder 1, the top of the test barrel 1 is connected with feed tube 2 and blast pipe 3, and the feed tube 2 is provided with liquid feed valve 4,
The blast pipe 3 is provided with air bleeding valve 5；The bottom of test barrel 1 is provided with discharging tube 6 and air inlet pipe 7, and the discharging tube 6 is provided with discharge opeing
Valve 8, the air inlet pipe 7 is provided with intake valve 9；The test barrel 1 is connected with air gauge 10, hydralic pressure gauge 11, thermometer by pipeline
12, the cylinder of test barrel 1 is connected with ground terminal 13 by wire, and test barrel 1 is communicated with the proof voltage inside and outside test barrel 1 and surveys
Examination terminal 14 and leakage current testing terminal 15.
For convenience of air is injected into test barrel 1, the air inlet pipe 7 is connected with air compressor 16.
For convenience of liquid needed for the injection test into test barrel 1, the feed tube 2 is connected with water pump 17.
Said temperature table 12 can be made using display instrument and thermocouple, and here is omitted.
Using the electrothermal tube method of testing of above-mentioned electrothermal tube test device, including water pressure resistance is tested, air pressure resistance is tested, resistance to height
Temperature test, normality test and leakage current testing；Wherein：
The step of water pressure resistance is tested is as follows：Cover is opened, electrothermal tube to be measured is put in test barrel 1, close cover；To enter
Air valve 9, air bleeding valve 5, tapping valve 8 are closed, and open liquid feed valve 4, and the water filling into test barrel 1 monitors test barrel 1 using hydralic pressure gauge 11
Interior hydraulic pressure, liquid feed valve 4 is closed when hydraulic pressure reaches predetermined pressure；After standing the scheduled time, open tapping valve 8 to discharge test
Water in cylinder 1, opens cover, takes out electrothermal tube to be measured, represents that electrothermal tube is qualified if crackle does not occur in electric heating pipe surface, electricity
There is crackle and then represents that electrothermal tube is unqualified in tube surface.
Air pressure resistance testing procedure is as follows：Cover is opened, electrothermal tube to be measured is put in test barrel 1, close cover；By feed liquor
Valve 4, tapping valve 8, air bleeding valve 5 are closed, and open intake valve 9, are inflated into test barrel 1, using in the monitoring test barrel 1 of air gauge 10
Air pressure, when air pressure reaches predetermined pressure close intake valve 9；After standing one hour, air bleeding valve 5 and cover are opened, taking-up is treated
Electrothermal tube is surveyed, represents that electrothermal tube is qualified if crackle does not occur in electric heating pipe surface, electric heating pipe surface crackle occurs and then represents electricity
Heat pipe is unqualified.
High temperature resistant testing procedure is as follows：Cover is opened, the electrothermal tube to be measured for being connected to power supply is put in test barrel 1, will be surveyed
One end of examination terminal is connected with the power end of electrothermal tube to be measured, and the other end is connected with proof voltage tester, by proof voltage tester
Earth terminal be connected with the ground terminal 13 of test barrel 1, close cover；Tapping valve 8 and intake valve 9 are closed, liquid feed valve 4 is opened
With air bleeding valve 5, silicone oil is injected into test barrel 1, then with closing liquid feed valve 4 and air bleeding valve 5；The power supply of electrothermal tube is connected, is made
Electrothermal tube generates heat, and using the temperature of silicone oil in the monitoring and test cylinder 1 of thermometer 12, when the temperature of silicone oil in test barrel 1 reach it is pre-
After constant temperature degree, the power supply of electrothermal tube is closed；Make proof voltage tester output 1250V voltages and kept for 60 seconds, finally close resistance to electricity
Pressure tester, takes out electrothermal tube, represents that electrothermal tube is qualified if electrothermal tube does not puncture, and puncturing occurs in electrothermal tube, and represents electric heating
Pipe is unqualified.
Normality testing procedure is as follows：Cover is opened, the electrothermal tube to be measured for being connected to power supply is put in test barrel 1, will be tested
One end of terminal is connected with the power end of electrothermal tube to be measured, and the other end is connected with proof voltage tester, by proof voltage tester
Earth terminal is connected with the ground terminal 13 of test barrel 1, closes cover；Liquid feed valve 4, tapping valve 8 and intake valve 9 are closed, is opened
Air bleeding valve 5；The power supply of electrothermal tube is connected, makes electrothermal tube generate heat, and using the temperature of air in the monitoring and test cylinder 1 of thermometer 12,
After the temperature of air in test barrel 1 reaches predetermined temperature, the power supply of electrothermal tube is closed；Proof voltage tester is set to export 1250V
Voltage is simultaneously kept for 60 seconds, finally closes proof voltage tester, takes out electrothermal tube, represents that electrothermal tube is closed if electrothermal tube does not puncture
Lattice, electrothermal tube occurs puncturing and then represent that electrothermal tube is unqualified.
Leakage current testing step is as follows：Cover is opened, the electrothermal tube to be measured for being connected to power supply is put in test barrel 1, will
One end of calibrating terminal is connected with the body of electrothermal tube to be measured, and the other end is connected with leakage current tester, will leak out electric current survey
The earth terminal of examination instrument is connected with the ground terminal 13 of test barrel 1, closes cover；Tapping valve 8 and intake valve 9 are closed, open into
Liquid valve 4 and air bleeding valve 5, into test barrel 1 silicone oil is injected, then with closing liquid feed valve 4 and air bleeding valve 5；Connect the electricity of electrothermal tube
Source, makes electrothermal tube generate heat, and using the temperature of silicone oil in the monitoring and test cylinder 1 of thermometer 12, when the temperature of silicone oil in test barrel 1 reaches
To predetermined temperature and it is stable after, carry out leakage current testing, in above process the table if leakage current tester is not reported to the police
Show that electrothermal tube is qualified, leakage current tester warning occurs and then represents that electrothermal tube is unqualified；Finally close the power supply of electrothermal tube.
Claims (8)
1. electrothermal tube method of testing, tests the electrothermal tube test device for adopting including a metallic test with movable cover
Cylinder, the top of the test barrel is connected with feed tube and blast pipe, and the feed tube is provided with liquid feed valve, and the blast pipe is provided with row
Air valve；The bottom of test barrel is provided with discharging tube and air inlet pipe, and the discharging tube is provided with tapping valve, and the air inlet pipe is provided with air inlet
Valve；The test barrel is connected with air gauge, hydralic pressure gauge, thermometer by pipeline, and the cylinder of test barrel is connected with by wire and is connect
Ground terminal, test barrel is communicated with the calibrating terminal inside and outside test barrel；It is characterized in that the electrothermal tube method of testing is including water-fast
Pressure test, air pressure resistance test, high temperature resistant test, normality test and leakage current testing, the air pressure resistance testing procedure is as follows：Beat
Cover is opened, electrothermal tube to be measured is put in test barrel, close cover；By liquid feed valve, tapping valve, exhaust valve closure, air inlet is opened
Valve, inflates into test barrel, and using air gauge the air pressure in test barrel is monitored, air inlet is closed when air pressure reaches predetermined pressure
Valve；After standing the scheduled time, air bleeding valve and cover are opened, electrothermal tube to be measured is taken out, if crackle does not occur in electric heating pipe surface
Represent that electrothermal tube is qualified, electric heating pipe surface crackle occurs and then represents that electrothermal tube is unqualified.
2. electrothermal tube method of testing according to claim 1, it is characterised in that the step of water pressure resistance is tested is as follows：Beat
Cover is opened, electrothermal tube to be measured is put in test barrel, close cover；Intake valve, air bleeding valve, tapping valve are closed, feed liquor is opened
Valve, the water filling into test barrel monitors the hydraulic pressure in test barrel using hydralic pressure gauge, and feed liquor is closed when hydraulic pressure reaches predetermined pressure
Valve；After standing the scheduled time, open tapping valve to discharge the water in test barrel, open cover, electrothermal tube to be measured is taken out, if electric
There is not crackle and then represents that electrothermal tube is qualified in tube surface, and electric heating pipe surface crackle occurs and then represents that electrothermal tube is unqualified.
3. electrothermal tube method of testing according to claim 1, it is characterised in that the high temperature resistant testing procedure is as follows：Open
Cover, the electrothermal tube to be measured for being connected to power supply is put in test barrel, by the power end of one end of calibrating terminal and electrothermal tube to be measured
It is connected, the other end is connected with proof voltage tester, and the earth terminal of proof voltage tester is connected with the ground terminal of test barrel, closes
Close cover；Tapping valve and intake valve are closed, liquid feed valve and air bleeding valve is opened, silicone oil is injected into test barrel, then with closing
Liquid feed valve and air bleeding valve；The power supply of electrothermal tube is connected, makes electrothermal tube generate heat, and using the temperature of silicone oil in thermometer monitoring and test cylinder
Degree, after the temperature of silicone oil in test barrel reaches predetermined temperature, closes the power supply of electrothermal tube；Make the output of proof voltage tester predetermined
Voltage is simultaneously kept for the scheduled time, finally closes proof voltage tester, takes out electrothermal tube, and if electrothermal tube does not puncture electric heating is represented
Pipe is qualified, and electrothermal tube occurs puncturing warning and then represents that electrothermal tube is unqualified.
4. electrothermal tube method of testing according to claim 1, it is characterised in that the normality testing procedure is as follows：Open cylinder
Lid, the electrothermal tube to be measured for being connected to power supply is put in test barrel, by the power end phase of one end of calibrating terminal and electrothermal tube to be measured
Even, the other end is connected with proof voltage tester, the earth terminal of proof voltage tester is connected with the ground terminal of test barrel, closes
Cover；Liquid feed valve, tapping valve and intake valve are closed, air bleeding valve is opened；The power supply of electrothermal tube is connected, makes electrothermal tube generate heat, and
Using the temperature of air in thermometer monitoring and test cylinder, after the temperature of air in test barrel reaches predetermined temperature, electric heating is closed
The power supply of pipe；Make proof voltage tester output predetermined voltage and kept for the scheduled time, finally close proof voltage tester, take out electricity
Heat pipe, represents that electrothermal tube is qualified if electrothermal tube does not puncture, and electrothermal tube occurs puncturing and then represent that electrothermal tube is unqualified.
5. electrothermal tube method of testing according to claim 1, it is characterised in that the leakage current testing step is as follows：Beat
Cover is opened, the electrothermal tube to be measured for being connected to power supply is put in test barrel, by the body of one end of calibrating terminal and electrothermal tube to be measured
It is connected, the other end is connected with leakage current tester, will leak out the earth terminal of current tester and the ground terminal phase of test barrel
Even, cover is closed；Tapping valve and intake valve are closed, liquid feed valve and air bleeding valve is opened, silicone oil, Ran Houyong are injected into test barrel
Close liquid feed valve and air bleeding valve；The power supply of electrothermal tube is connected, makes electrothermal tube generate heat, and using silicone oil in thermometer monitoring and test cylinder
Temperature, when the temperature of silicone oil in test barrel reach predetermined temperature and it is stable after, leakage current testing is carried out, in above-mentioned leakage electricity
Represent that electrothermal tube is qualified if leakage current tester is not reported to the police during current test, reporting to the police then occurs in leakage current tester
Represent that electrothermal tube is unqualified；Finally close the power supply of electrothermal tube.
6. electrothermal tube method of testing according to claim 1, it is characterised in that the calibrating terminal includes proof voltage test
Terminal and leakage current testing terminal.
7. electrothermal tube method of testing according to claim 1, it is characterised in that the air inlet pipe is connected with air compressor.
8. electrothermal tube method of testing according to claim 1, it is characterised in that the feed tube is connected with water pump.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201410843356.1A CN104535113B (en) | 2014-12-30 | 2014-12-30 | Electric heating tube testing method |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201410843356.1A CN104535113B (en) | 2014-12-30 | 2014-12-30 | Electric heating tube testing method |
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| Publication Number | Publication Date |
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| CN104535113A CN104535113A (en) | 2015-04-22 |
| CN104535113B true CN104535113B (en) | 2017-05-03 |
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Families Citing this family (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| 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 |
| CN109186891B (en) * | 2018-09-14 | 2020-10-09 | 安徽苏立科技股份有限公司 | Heating pipe sealing 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 |
| 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 |
| CN116577595B (en) * | 2023-07-12 | 2023-09-26 | 扬州兴民电器有限公司 | Electrical heating tube performance testing device |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| US7256372B2 (en) * | 2005-12-07 | 2007-08-14 | Aos Holding Company | Fluid-heating apparatus, circuit for heating a fluid, and method of operating the same |
| CN201438166U (en) * | 2009-04-30 | 2010-04-14 | 陕西理工学院 | Automatic control device for hydraulic pressure test and gas tight test |
| CN101907508B (en) * | 2010-07-13 | 2011-10-12 | 皇明太阳能股份有限公司 | Low and high temperature hydraulic and pneumatic pressure seal test equipment |
| CN102359852A (en) * | 2011-09-22 | 2012-02-22 | 山东力诺瑞特新能源有限公司 | Leak detection method for electrical heating tube orifice of inner container of solar water heater |
| CN202350832U (en) * | 2011-12-07 | 2012-07-25 | 青岛四方车辆研究所有限公司 | Performance test stand for electric drinking water boiler |
| CN203526081U (en) * | 2013-10-10 | 2014-04-09 | 广东金田电热制品有限公司 | Electrical heating tube detection device |
| CN103691679B (en) * | 2014-01-02 | 2015-11-04 | 宋书兴 | The voltage-withstand test of electrothermal tube machine for shrinking rejects transfer device and method of testing |
| CN203909163U (en) * | 2014-04-29 | 2014-10-29 | 中山市广盛实业有限公司 | Water heater test platform |
| CN204461470U (en) * | 2014-12-30 | 2015-07-08 | 信宜市汇美电器有限公司 | Electrothermal tube proving installation |
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