CN103900774A - Oil cooler dry and wet mixed sealing performance test method and device - Google Patents
Oil cooler dry and wet mixed sealing performance test method and device Download PDFInfo
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Abstract
The invention belongs to the technical field of oil cooler sealing tests, and particularly relates to an oil cooler dry and wet mixed sealing performance test method and device. The oil cooler dry and wet mixed sealing performance test device comprises a dry test system and a water test system, wherein gas with different magnitudes of pressure is injected into the dry test system through a water path and an oil path in an oil cooler so that leak hunting can be conducted; the water test system is used for conducting leak hunting when whether bubbles exist or not is detected by placing the oil cooler in water and injecting high-pressure gas into the water path or the oil path where the low-pressure gas is injected. The test process of the sealing performance dry test method integrates the advantages of manual work and the advantages of machines, and the method and the device have the advantages of being low in device expense, visual, easy to dry and the like and are particularly suitable for products which are at the small-scale production stage or unstable in percentage of pass.
Description
Technical field
The invention belongs to oil cooler leakage test technical field, refer in particular to that a kind of oil cooler is dry, sealing test method and equipment thereof are closed in wet mixing.
Background technology
Oil cooler sealing is the key characteristic of product, and performing leak test is one of critical process of oil cooler production.Disk, box-type oil cooler exist the oil circuit of mutual isolation and water route need to test respectively sealing simultaneously, the performing leak test pressure of oil cooler is high, general water route test pressure 0.5～2MPa, oil circuit test pressure 1～2MPa, and there are three kinds of leakage mode: water route leaks outside, oil circuit leaks outside, interior leakage between oil circuit and water route, requires test respectively.Traditional oil cooler sealing test method is water examination method, exists people to need to dry the problems such as power consumption is large after visualization unreliable (when interior leakage, minute bubbles be can't see), test.More existing dry method for testing exist cost of equipment high, can not judge the problems such as leakage point, reuse water examination method and find leakage point when detecting the product needed of leakage, while not being very high, can bring a lot of troubles in product percent of pass.
Summary of the invention
The object of this invention is to provide and a kind of detect that effect accuracy is high, cost of equipment is low, dry and be easy to that oil cooler is dry, sealing test method and equipment thereof are closed in wet mixing.
The object of the present invention is achieved like this:
Oil cooler is dry, impermeability test equipment is closed in wet mixing, include dry test system and water test system, described dry test system is: include the first high-pressure air source pipeline with the first solenoid valve docking with the oil circuit of oil cooler, the low-pressure gas source pipeline with the second solenoid valve docking with the water route of oil cooler, on the first described high-pressure air source pipeline, be provided with pressure transducer, on the first described high-pressure air source pipeline, be connected with gases at high pressure on the oil circuit for discharging oil cooler the high-pressure air source gas exhaust piping with the 3rd solenoid valve, on the low-pressure gas source pipeline between the second solenoid valve and the water route of oil cooler, be provided with leak locator, on leak locator, be connected with contrast chamber, on described low-pressure gas source pipeline, be connected with the gas that discharges on oil cooler water route the gas exhaust piping with the 4th solenoid valve, described water test system is: include the tank for oil cooler being placed in to water, on the low-pressure gas source pipeline between water route and the leak locator of oil cooler, be provided with the 5th solenoid valve, on low-pressure gas source pipeline between the 5th solenoid valve and the water route of oil cooler, be connected with the second high-pressure air source pipeline with the 6th solenoid valve that high pressure air is provided in the water route to oil cooler, on the second high-pressure air source pipeline, be provided with pressure transducer.
Low-pressure gas source pipeline, the first high-pressure air source pipeline interchangeable of between the water route of above-mentioned oil cooler and oil circuit, docking.
The above-mentioned high-pressure air source gas exhaust piping with the 3rd solenoid valve is arranged between the first solenoid valve and oil cooler on the first high-pressure air source pipeline; Or the described high-pressure air source gas exhaust piping with the 3rd solenoid valve docks with oil cooler by threeway adapter, threeway adapter also connects the first high-pressure air source pipeline.
The above-mentioned gas exhaust piping with the 4th solenoid valve is arranged on the low-pressure gas source pipeline between the 5th solenoid valve and leak locator; Or the described gas exhaust piping with the 4th solenoid valve is arranged on the low-pressure gas source pipeline between oil cooler and the 5th solenoid valve.
The method that oil cooler is dry, impermeability test is closed in wet mixing, concrete steps are as follows:
1) test is prepared: before test, oil cooler water route and the connection of low-pressure gas source pipeline sealing, oil circuit and the first high-pressure air source pipeline are connected and are sealed, due to complete hermetic reason, when oil cooler is whole be immersed in the water after, water route and oil circuit inside can not intake;
2) adopt dry test system to carry out the interior test leakage examination between oil circuit and water route: open first, second, the 5th solenoid valve, in the first high-pressure air source pipeline, be filled with high pressure air, in low-pressure gas source pipeline, be filled with low-pressure compressed air; Water route or oil circuit are connected with leak locator, after inflation, the first solenoid valve and the second closed electromagnetic valve, leak locator detects the variation of water route pressure, owing to having pressure differential between oil circuit and water route, so while leakage in existing between oil circuit, water route, will make water route pressure change, exceed the permission changing value of setting, leak locator will alarm product leakage, and test finishes; Arrived the detection time of setting, if there is no interior leakage between oil circuit, water route, enters next step water examination process;
3) adopt water test system to test: if do not discharge water in tank in step 1), in tank, pile water, close the 5th solenoid valve between water route and leak locator, open the 6th solenoid valve on the second high-pressure air source pipeline, connect high pressure air, oil circuit pressure is constant, oil cooler is immersed in the water, whether observe and have bubble to emerge with eyes, leaker is mark leak position directly, stop test;
4) pressure release: open the 3rd solenoid valve, the 4th solenoid valve on high-pressure air source gas exhaust piping and gas exhaust piping, pressure release is carried out respectively in the oil circuit to oil cooler and water route;
5) dry: the oil cooler after pressure release in step 4) to be taken out from water, use drying plant to dry or dry up appearance moisture with pressurized air.
In the dry examination process of step 1), oil cooler can be immersed in the water or not be immersed in the water and carry out.
The pressure of the high pressure air in the first above-mentioned high-pressure air source pipeline is 1～2MPa, and the pressure of low-pressure compressed air is 10～5000Pa, and the pressure of the high pressure air in the second high-pressure air source pipeline is 0.5～2MPa.
Low-pressure gas source pipeline, the first high-pressure air source pipeline interchangeable of between the water route of above-mentioned oil cooler and oil circuit, docking.
The advantage that the present invention gives prominence to is compared to existing technology:
1, the present invention adopts dry, wet (water) mixing sealing test method, draws the advantage of dry method for testing and water method for testing simultaneously, avoids again its shortcoming; The test of oil cooler inner sealing adopts dry method for testing, does not contact water; Adopt water examination and the oil circuit of oil cooler leaks outside and water route leaks outside, can see intuitively leak position, test rear easy oven dry, even directly dry up with pressurized air and do not need oven dry.
2, dry test method for testing leak tightness test process of the present invention set artificial and machine advantage separately, have cost of equipment low, directly perceived, dry the features such as easy, be particularly suitable for also in small serial production stage or the unsettled product of qualification rate.
Accompanying drawing explanation
Fig. 1 is principle schematic of the present invention.
In figure, 1-tank, 2-oil circuit, 3-water route, 4-the 5th solenoid valve, 5-gas exhaust piping, 6-the 4th solenoid valve, 7-the second solenoid valve, 8-low-pressure gas source pipeline, 9-the first high-pressure air source pipeline, 10-pressure transducer, 11-the first solenoid valve, 12-high-pressure air source gas exhaust piping, 13-the 3rd solenoid valve, 14-the second high-pressure air source pipeline, 15-pressure transducer, 16-the 6th solenoid valve, 17-contrasts chamber, 18-leak locator (built-in differential pressure pickup and related system).
Embodiment
Below in conjunction with accompanying drawing, with specific embodiment, the invention will be further described, referring to Fig. 1:
Oil cooler is dry, impermeability test equipment is closed in wet mixing, include dry test system and water test system, described dry test system is: include the first high-pressure air source pipeline 9 with the first solenoid valve 11 docking with the oil circuit 2 of oil cooler, with the water route 3 of oil cooler and the low-pressure gas source pipeline 8 with the second solenoid valve 7, on the first described high-pressure air source pipeline 9, be provided with pressure transducer 10, on the first described high-pressure air source pipeline 9, be connected with for discharging gases at high pressure on the oil circuit 2 of oil cooler the high-pressure air source gas exhaust piping 12 with the 3rd solenoid valve 13, on the low-pressure gas source pipeline 8 between the second solenoid valve 7 and the water route 3 of oil cooler, be provided with leak locator 18, on leak locator 18, be connected with contrast chamber 17, on described low-pressure gas source pipeline 8, be connected with the gas that discharges on oil cooler water route 3 gas exhaust piping 5 with the 4th electromagnetism 6 valves, described water test system is: include the tank 1 for oil cooler being placed in to water, on the low-pressure gas source pipeline 8 between water route 3 and the leak locator 18 of oil cooler, be provided with the 5th solenoid valve 4, on low-pressure gas source pipeline 8 between the 5th solenoid valve 4 and the water route 3 of oil cooler, be connected with the second high-pressure air source pipeline 14 with the 6th solenoid valve 16 that high pressure air is provided in the water route 3 to oil cooler, on the second high-pressure air source pipeline 14, be provided with pressure transducer 15.
Low-pressure gas source pipeline 8, first high-pressure air source pipeline 9 interchangeable of between the water route 3 of above-mentioned oil cooler and oil circuit 2, docking.The water route 3 that is to say oil cooler can connect the first high-pressure air source pipeline 9, and oil circuit 2 connects low-pressure gas source pipeline 8, when corresponding water examination, tests with regard to be filled with high pressure air in oil circuit 2.
The above-mentioned high-pressure air source gas exhaust piping 12 with the 3rd solenoid valve 13 is arranged between the first solenoid valve 11 and oil cooler on the first high-pressure air source pipeline 9; Or the described high-pressure air source gas exhaust piping 12 with the 3rd solenoid valve 13 docks with oil cooler by threeway adapter, threeway adapter also connects the first high-pressure air source pipeline 9.
The above-mentioned gas exhaust piping 5 with the 4th solenoid valve 6 is arranged on the low-pressure gas source pipeline 8 between the 5th solenoid valve 4 and leak locator 18; Or the described gas exhaust piping 5 with the 4th solenoid valve 6 is arranged on the low-pressure gas source pipeline 8 between oil cooler and the 5th solenoid valve 4.
The present invention is applicable to disc type, box-type oil cooler to test.
The method that oil cooler is dry, impermeability test is closed in wet mixing, concrete steps are as follows:
1) test is prepared: before test, oil cooler water route 3 and low-pressure gas source pipeline 8 are connected and sealed by frock and fixture by frock and fixture connection sealing, oil circuit and the first high-pressure air source pipeline 9, due to complete hermetic reason, when oil cooler is whole be immersed in the water after, water route 3 and oil circuit 2 inside can not intake;
2) adopt dry test system to carry out the interior test leakage examination between oil circuit 2 and water route 3: Pen-down detection button, open first, second, the 5th solenoid valve 11,7,4, in the first high-pressure air source pipeline 9, be filled with 1～2MPa high pressure air (presetting force value according to product needed), pressure when pressure transducer 10 is monitored high pressure air input, in low-pressure gas source pipeline 8, be filled with 10～5000Pa low-pressure compressed air, in contrast chamber 17, be also filled with the low-pressure compressed air with low-pressure gas source pipeline 8 uniform pressure; Water route 3 is connected with leak locator 18, after inflation, the first solenoid valve 11 and the second solenoid valve 7 are closed, leak locator 18 detects the variation of water route 3 pressure, owing to having 1～2MPa pressure differential between oil circuit 2 and water route 3, so while leakage in existing between oil circuit 2, water route 3, will make water route 3 pressure change, exceed the permission changing value of setting, leak locator 18 will alarm product leakage, and test finishes; Arrived the detection time of setting, if there is no interior leakage between oil circuit 2, water route 3, enters next step water examination process;
3) adopt water test system to test: if do not discharge water in tank 1 in step 1), in tank 1, pile clean water, close the 5th solenoid valve 4 between water route 3 and leak locator 18, open the 6th solenoid valve 16 on the second high-pressure air source pipeline 14, connection is filled with 0.5～2MPa high pressure air (presetting force value according to product needed), pressure when pressure transducer 15 is monitored high pressure air input, oil circuit 2 pressure are constant, oil cooler is immersed in the water, observe and whether have bubble to emerge with eyes, leaker is mark leak position directly, stop test, pressure of the present invention is relative pressure, i.e. gauge pressure,
4) pressure release: open the 3rd solenoid valve 13, the 4th solenoid valve 6 on high-pressure air source gas exhaust piping 12 and gas exhaust piping 5, pressure release is carried out respectively in the oil circuit 2 to oil cooler and water route 3;
5) dry: to unclamp frock clamp, the oil cooler after pressure release in step 4) is taken out from water, stamp mark of conformity, use drying plant to dry or dry up appearance moisture with pressurized air.
After oil cooler performing leak test completes, because baroque inside does not have water, only have outside surface to have a small amount of moisture, be very easy to use pressurized air to dry up or drying plant oven dry.
In the dry examination process of step 1), oil cooler can be immersed in the water or not be immersed in the water and carry out.
Low-pressure gas source pipeline 8, first high-pressure air source pipeline 9 interchangeable of between the water route 3 of above-mentioned oil cooler and oil circuit 2, docking.
High pressure air and low-pressure air that the present invention uses are dried gas.
Above-described embodiment is only preferred embodiment of the present invention, not limits the scope of the invention according to this, therefore: all equivalences of doing according to structure of the present invention, shape, principle change, within all should being covered by protection scope of the present invention.
Claims (8)
1. oil cooler is dry, impermeability test equipment is closed in wet mixing, it is characterized in that: include dry test system and water test system, described dry test system is: include the first high-pressure air source pipeline with the first solenoid valve docking with the oil circuit of oil cooler, the low-pressure gas source pipeline with the second solenoid valve docking with the water route of oil cooler, on the first described high-pressure air source pipeline, be provided with pressure transducer, on the first described high-pressure air source pipeline, be connected with gases at high pressure on the oil circuit for discharging oil cooler the high-pressure air source gas exhaust piping with the 3rd solenoid valve, on the low-pressure gas source pipeline between the second solenoid valve and the water route of oil cooler, be provided with leak locator, on leak locator, be connected with contrast chamber, on described low-pressure gas source pipeline, be connected with the gas that discharges on oil cooler water route the gas exhaust piping with the 4th solenoid valve, described water test system is: include the tank for oil cooler being placed in to water, on the low-pressure gas source pipeline between water route and the leak locator of oil cooler, be provided with the 5th solenoid valve, on low-pressure gas source pipeline between the 5th solenoid valve and the water route of oil cooler, be connected with the second high-pressure air source pipeline with the 6th solenoid valve that high pressure air is provided in the water route to oil cooler, on the second high-pressure air source pipeline, be provided with pressure transducer.
2. impermeability test equipment is closed in dry, the wet mixing of oil cooler according to claim 1, it is characterized in that: low-pressure gas source pipeline, the first high-pressure air source pipeline interchangeable of between the water route of described oil cooler and oil circuit, docking.
3. impermeability test equipment is closed in dry, the wet mixing of oil cooler according to claim 1, it is characterized in that: the described high-pressure air source gas exhaust piping with the 3rd solenoid valve is arranged between the first solenoid valve and oil cooler on the first high-pressure air source pipeline; Or the described high-pressure air source gas exhaust piping with the 3rd solenoid valve docks with oil cooler by threeway adapter, threeway adapter also connects the first high-pressure air source pipeline.
4. impermeability test equipment is closed in dry, the wet mixing of oil cooler according to claim 1, it is characterized in that: the described gas exhaust piping with the 4th solenoid valve is arranged on the low-pressure gas source pipeline between the 5th solenoid valve and leak locator; Or the described gas exhaust piping with the 4th solenoid valve is arranged on the low-pressure gas source pipeline between oil cooler and the 5th solenoid valve.
5. the method that oil cooler is dry, impermeability test is closed in wet mixing, is characterized in that: concrete steps are as follows:
1) test is prepared: before test, oil cooler water route and the connection of low-pressure gas source pipeline sealing, oil circuit and the first high-pressure air source pipeline are connected and are sealed, due to complete hermetic reason, when oil cooler is whole be immersed in the water after, water route and oil circuit inside can not intake;
2) adopt dry test system to carry out the interior test leakage examination between oil circuit and water route: open first, second, the 5th solenoid valve, in the first high-pressure air source pipeline, be filled with high pressure air, in low-pressure gas source pipeline, be filled with low-pressure compressed air; Water route or oil circuit are connected with leak locator, after inflation, the first solenoid valve and the second closed electromagnetic valve, leak locator detects the variation of water route pressure, owing to having pressure differential between oil circuit and water route, so while leakage in existing between oil circuit, water route, will make water route pressure change, exceed the permission changing value of setting, leak locator will alarm product leakage, and test finishes; Arrived the detection time of setting, if there is no interior leakage between oil circuit, water route, enters next step water examination process;
3) adopt water test system to test: if do not discharge water in tank in step 1), in tank, pile water, close the 5th solenoid valve between water route and leak locator, open the 6th solenoid valve on the second high-pressure air source pipeline, connect high pressure air, oil circuit pressure is constant, oil cooler is immersed in the water, whether observe and have bubble to emerge with eyes, leaker is mark leak position directly, stop test;
4) pressure release: open the 3rd solenoid valve, the 4th solenoid valve on high-pressure air source gas exhaust piping and gas exhaust piping, pressure release is carried out respectively in the oil circuit to oil cooler and water route;
5) dry: the oil cooler after pressure release in step 4) to be taken out from water, use drying plant to dry or dry up appearance moisture with pressurized air.
6. the method that oil cooler according to claim 5 is dry, impermeability test is closed in wet mixing, is characterized in that: in the dry examination process of step 1), oil cooler can be immersed in the water or not be immersed in the water and carry out.
7. the method that oil cooler according to claim 5 is dry, impermeability test is closed in wet mixing, it is characterized in that: the pressure of the high pressure air in the first described high-pressure air source pipeline is 1～2MPa, the pressure of low-pressure compressed air is 10～5000Pa, and the pressure of the high pressure air in the second high-pressure air source pipeline is 0.5～2MPa.
8. the method that oil cooler according to claim 5 is dry, impermeability test is closed in wet mixing, is characterized in that: low-pressure gas source pipeline, the first high-pressure air source pipeline interchangeable of between the water route of described oil cooler and oil circuit, docking.
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Cited By (4)
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| CN105043674A (en) * | 2015-09-09 | 2015-11-11 | 浙江施克汽车配件有限公司 | Receiver-drier air tightness test method |
| CN107576458A (en) * | 2017-09-26 | 2018-01-12 | 安徽安凯汽车股份有限公司 | A kind of brake line of automobile air-tightness automatic detection device and its detection method |
| CN109540400A (en) * | 2018-11-29 | 2019-03-29 | 东莞市卓越鑫汽车电子科技有限公司 | The waterproof detection method of coaxial connector and the waterproof detection system of coaxial connector |
| CN110307951A (en) * | 2019-07-25 | 2019-10-08 | 浙江银轮机械股份有限公司 | Dry type leakage detecting apparatus and dry type leak hunting method |
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| CN103900774B (en) | 2016-05-18 |
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Denomination of invention: Test method and equipment of dry and wet mixture tightness of oil cooler Effective date of registration: 20210610 Granted publication date: 20160518 Pledgee: Bank of China Limited by Share Ltd. Tiantai County branch Pledgor: ZHEJIANG YINLUN MACHINERY Co.,Ltd. Registration number: Y2021330000510 |
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Effective date of registration: 20220815 Address after: No. 111 Qingwei Road, Fengxian District, Shanghai 201400 Patentee after: SHANGHAI YINLUN HEAT EXCHANGE SYSTEM CO.,LTD. Address before: 317200 Fuxi Street Transportation Machinery Industrial Park, Tiantai County, Taizhou, Zhejiang Patentee before: ZHEJIANG YINLUN MACHINERY Co.,Ltd. |
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