CN114812964A - Built-in sensor sealing detection device and method - Google Patents
Built-in sensor sealing detection device and method Download PDFInfo
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- CN114812964A CN114812964A CN202111161541.9A CN202111161541A CN114812964A CN 114812964 A CN114812964 A CN 114812964A CN 202111161541 A CN202111161541 A CN 202111161541A CN 114812964 A CN114812964 A CN 114812964A
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- 238000001514 detection method Methods 0.000 title claims abstract description 71
- 238000007789 sealing Methods 0.000 title claims abstract description 37
- 238000000034 method Methods 0.000 title claims abstract description 15
- 238000012360 testing method Methods 0.000 claims abstract description 121
- 229910001220 stainless steel Inorganic materials 0.000 claims description 3
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- 238000012986 modification Methods 0.000 description 3
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- 238000005516 engineering process Methods 0.000 description 2
- 238000005086 pumping Methods 0.000 description 2
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- 230000007797 corrosion Effects 0.000 description 1
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- G01M—TESTING STATIC OR DYNAMIC BALANCE OF MACHINES OR STRUCTURES; TESTING OF STRUCTURES OR APPARATUS, NOT OTHERWISE PROVIDED FOR
- G01M3/00—Investigating fluid-tightness of structures
- G01M3/02—Investigating fluid-tightness of structures by using fluid or vacuum
- G01M3/26—Investigating fluid-tightness of structures by using fluid or vacuum by measuring rate of loss or gain of fluid, e.g. by pressure-responsive devices, by flow detectors
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Abstract
The invention provides a device and a method for detecting the sealing property of a built-in sensor. The device includes: a base; the test bench is arranged on the base; the vacuum pump is communicated with the test board; the oil pump is communicated with the test board; and the pressure gauge is connected with the test board and used for detecting and displaying the pressure value in the test board in real time so as to obtain the pressure value of the sensor to be detected, and further carrying out positive pressure and negative pressure tightness detection on the sensor to be detected according to the change of the pressure value. According to the invention, the vacuum pump is used for vacuumizing, so that the test board is in a negative pressure state, and the sensor to be tested is in a negative pressure environment; and oil is injected and pressurized through an oil pump, so that the test bench is in a positive pressure state, the sensor to be tested is in a positive pressure environment, the change of the pressure value of the pressure gauge is recorded within a specified time, the tightness of the built-in sensor is detected, and whether the negative pressure tightness of the sensor to be tested is qualified or not is judged.
Description
Technical Field
The invention relates to the technical field of sensors, in particular to a device and a method for detecting the tightness of a built-in sensor.
Background
The detection of partial discharge ultrahigh frequency of a transformer and a GIS is one of effective detection methods, a built-in ultrahigh frequency sensor is used as an important component of a built-in detection device or device of important equipment such as the transformer, the sealing performance of the built-in ultrahigh frequency sensor directly influences the operation state of the transformer and the GIS, the sealing performance of the built-in ultrahigh frequency sensor is one of important factors for ensuring the normal operation of the important equipment such as the transformer, and if the sealing performance of the sensor is unqualified, the leakage phenomenon occurs, and equipment damage or production accidents are caused. Therefore, the tightness test is regarded as one of the test items for the performance test of the sensor before the sensor leaves the factory, and is more and more emphasized by the sensor manufacturer and the operation department.
The sealing performance detection test of the built-in ultrahigh frequency sensor aims to detect the sealing performance of the sensor to be tested and judge whether the tested sensor is qualified or not by observing the pressure value change of the sensor to be tested in a specified time.
At present, the traditional sensor tightness detection device can only apply positive pressure or negative pressure to a sensor to be detected singly, so that the detection test has limitations, the function is not comprehensive enough, meanwhile, certain influence can be generated on the detection result, and the test requirement of the built-in ultrahigh frequency sensor tightness detection cannot be met. In view of the above circumstances, it is necessary to develop a sealing performance detection device for an ultrahigh frequency built-in sensor, which can perform both a positive pressure test, i.e., an oil pressure test, and a negative pressure test on the built-in ultrahigh frequency sensor.
Disclosure of Invention
In view of the above, the invention provides a device and a method for detecting the sealing performance of a built-in sensor, and aims to solve the problem that the existing device for detecting the sealing performance of the sensor has limitations and cannot meet the requirements of a sealing performance detection test of the built-in ultrahigh frequency sensor.
In one aspect, the present invention provides a device for detecting the sealing performance of a built-in sensor, including: a base; the test bench is arranged on the base and used for providing a built-in closed detection environment of the sensor to be detected; the vacuum pump is communicated with the test board and used for vacuumizing to enable the interior of the test board to be in a negative pressure state, and further enable the sensor to be tested to be in a negative pressure environment; the oil pump is communicated with the test board and is used for injecting oil and pressurizing to enable the interior of the test board to be in a positive pressure state, so that the sensor to be tested is in a positive pressure environment; and the pressure gauge is connected with the test board and used for detecting and displaying the pressure value in the test board in real time so as to obtain the pressure value of the sensor to be detected, and further carrying out positive pressure and negative pressure tightness detection on the sensor to be detected according to the change of the pressure value.
Further, in the device for detecting the sealing property of the built-in sensor, the vacuum pump is communicated with the test board through a vacuum pipeline, and the vacuum pipeline is provided with a vacuum valve for controlling the opening and closing of the vacuum pipeline.
Further, in the device for detecting the sealing property of the built-in sensor, the oil pump is communicated with the test board through an oil pressure pipeline, and a vacuum valve is arranged on the oil pressure pipeline and used for controlling the opening and closing of the oil pressure pipeline.
Furthermore, the built-in sensor tightness detection device is characterized in that a mounting hole is formed in the test board, and a switching flange is arranged at the mounting hole and used for connecting the sealing flange and the sensor flange, so that a sensor to be detected is built in and mounted in the test board.
Furthermore, the number of the test tables is multiple, and the test tables are independent to each other so as to independently detect the positive pressure or negative pressure tightness of the sensors to be detected.
Further, the device for detecting the sealing performance of the built-in sensor further comprises: and the control screen is respectively connected with the vacuum pump and the oil pump and used for controlling the starting and stopping of the vacuum pump and the oil pump.
Further, the test bench is connected with an oil drain valve and an exhaust valve.
Further, in the device for detecting the sealing property of the built-in sensor, the vacuum valve is a mixing stop valve.
Furthermore, in the device for detecting the sealing property of the built-in sensor, the test board is made of stainless steel.
On the other hand, the invention provides a method for detecting the tightness of a built-in sensor, which adopts the built-in sensor tightness detection device to carry out positive pressure tightness detection and negative pressure tightness detection; the negative pressure sealing performance detection specifically comprises the following steps: installing a sensor to be detected on a test board in a built-in mode, vacuumizing the test board by using a vacuum pump until a pressure gauge arranged on the test board displays that the pressure is lower than a preset negative pressure, acquiring a first vacuum value of the pressure gauge after a first time period, acquiring a second vacuum value of the pressure gauge after a second time period, determining the difference between the second vacuum value and the first vacuum value, comparing the difference with a negative pressure detection threshold value, and judging whether the negative pressure tightness of the sensor is qualified; the positive pressure tightness detection specifically comprises the following steps: the method comprises the steps of injecting oil into a test board by using an oil pressure pump, pressurizing, closing an exhaust valve after the oil discharged by an exhaust pipe has no bubbles until the pressure displayed by a pressure gauge arranged on the test board reaches a preset positive pressure, acquiring a first pressure value of the pressure gauge after a first time period, acquiring a second pressure value of the pressure gauge after a second time period, determining the difference between the second pressure value and the first pressure value, comparing the difference between the second pressure value and the first pressure value with a positive pressure detection threshold value, and judging whether the negative pressure tightness of the sensor is qualified.
The invention provides a device and a method for detecting the sealing property of a built-in sensor, wherein a built-in closed detection environment of the sensor to be detected is provided through a test board; vacuumizing through a vacuum pump to enable the test board to be in a negative pressure state, further enabling the sensor to be tested to be in a negative pressure environment, recording the change of the pressure value of the pressure gauge within a specified time, detecting the negative pressure tightness of the built-in sensor, and judging whether the negative pressure tightness of the sensor to be tested is qualified; and the oil pump is used for injecting oil and pressurizing to enable the test bench to be in a positive pressure state, so that the sensor to be tested is in a positive pressure environment, the positive pressure tightness of the built-in sensor is detected according to the change of the pressure value of the pressure gauge in the specified time, and whether the positive pressure tightness of the sensor to be tested is qualified is judged. The device can be used for detecting the sealing performance of the built-in ultrahigh frequency sensor of the GIS and the built-in ultrahigh frequency sensor of the transformer, and is very wide in application. Meanwhile, the device also comprehensively applies an automatic control technology and a pressure test principle, can carry out vacuum test, namely negative pressure test, on the tightness of the sensor to be tested by pumping vacuum, and can carry out oil pressure test, namely positive pressure test, on the tightness of the sensor to be tested by injecting oil and pressurizing, so that the device is simple to operate and convenient to detect.
Drawings
Various other advantages and benefits will become apparent to those of ordinary skill in the art upon reading the following detailed description of the preferred embodiments. The drawings are only for purposes of illustrating the preferred embodiments and are not to be construed as limiting the invention. Also, like reference numerals are used to refer to like parts throughout the drawings. In the drawings:
fig. 1 is a schematic structural diagram of a built-in sensor tightness detection device provided in an embodiment of the present invention;
FIG. 2 is a front view of a built-in sensor leak detection device provided by an embodiment of the present invention;
FIG. 3 is a top view of an in-line sensor seal detection apparatus provided by an embodiment of the present invention;
FIG. 4 is a side view of an in-built sensor seal detection arrangement provided by an embodiment of the present invention;
FIG. 5 is a schematic structural diagram of a sensor mounting at a transfer flange according to an embodiment of the present invention;
FIG. 6 is a hydraulic schematic diagram of a built-in sensor leak detection apparatus according to an embodiment of the present invention;
fig. 7 is an electrical schematic diagram of a device for detecting the tightness of a built-in sensor according to an embodiment of the present invention.
Detailed Description
Exemplary embodiments of the present disclosure will be described in more detail below with reference to the accompanying drawings. While exemplary embodiments of the present disclosure are shown in the drawings, it should be understood that the present disclosure may be embodied in various forms and should not be limited to the embodiments set forth herein. Rather, these embodiments are provided so that this disclosure will be thorough and complete, and will fully convey the scope of the disclosure to those skilled in the art. It should be noted that the embodiments and features of the embodiments may be combined with each other without conflict. The present invention will be described in detail below with reference to the embodiments with reference to the attached drawings.
The embodiment of the device is as follows:
referring to fig. 1 to 7, preferred structures of the built-in sensor leak detection device provided by the embodiment of the invention are shown. As shown, the apparatus comprises: the device comprises a base 1, a test board 2, a vacuum pump 3, an oil pump 4, a pressure gauge 5 and a control screen 6; wherein,
the base 1 serves as a supporting platform, and as shown in fig. 1, the bottom of the base 1 can be provided with walking wheels 11 to realize the position adjustment of the device.
The test bench 2 is arranged on the base 1 and used for providing a built-in closed detection environment of the sensor to be detected. Specifically, a cavity can be arranged inside the test board 2 and used for providing a detection cavity of the sensor to be detected; as shown in fig. 5, a mounting hole 21 is formed in an outer wall of the test platform 2, and an adapter flange 22 is disposed at the mounting hole 21 and is used for connecting the sealing flange 7 and the sensor flange 8, so that the sensor to be tested is built in the test platform 2, of course, the sealing flange 7 may also be connected to the adapter flange 22, so that the sensor flange 8 can be directly mounted later; the sensor to be tested can be reliably fixed on the adapter flange 22 on the test bench 2 through a nut, so that reliable connection is realized. Wherein, testboard 2 can adopt stainless steel, and is corrosion-resistant, pleasing to the eye, can prevent the impact of external force. The sensor to be measured can be a built-in ultrahigh frequency sensor or other built-in sensors.
The vacuum pump 3 is communicated with the test board 2 and used for vacuumizing to enable the interior of the test board 2 to be in a negative pressure state, and further enabling the sensor to be tested to be in a negative pressure environment. Specifically, the vacuum pump 3 can be communicated with the test board 2 through an oil pressure pipeline and used as a pressure source for vacuum test, and the sensor to be tested is in a negative pressure environment through vacuumizing; preferably, a vacuum valve 31 is arranged on the oil pressure pipeline and used for controlling the opening and closing of the oil pressure pipeline, the vacuum pump 3 is connected with the vacuum valve 31, the test bench 2 and the pressure gauge 5 through pipelines, and a vacuum test environment for a built-in ultrahigh frequency sensor tightness test can be provided through the vacuumizing of the vacuum pump 3. Wherein, the vacuum valve 31 can adopt a mixing stop valve, and can ensure the sealing of the transformer oil liquid and the sealing of the gas at the same time.
The oil pump 4 is communicated with the test board 2 and used for injecting oil and pressurizing to enable the test board 2 to be in a positive pressure state, and further enabling the sensor to be tested to be in a positive pressure environment. Specifically, the oil pump 4 can be communicated with the test bench through a vacuum pipeline; preferably, a vacuum valve is arranged on the vacuum pipeline and used for controlling the opening and closing of the vacuum pipeline, in an oil pressure test of the sealing performance detection test of the ultrahigh frequency built-in sensor, the oil pump 4 is connected with the oil pressure valve 41, the test bench 2 and the pressure instrument 5 through pipelines and used as a pressure source for the oil pressure test, and the sensor to be tested is in a positive pressure environment through oil injection and pressurization. The hydraulic valve 41 is connected to the test table 3 and is used for controlling the opening and closing of the hydraulic pipeline. In this embodiment, the detection pipe is divided into two layers, the upper layer is a vacuum test portion, and the lower layer is an oil pressure test portion, so as to perform adjustment of vacuum and oil pressure, respectively. Wherein, the last overflow valve that can be connected with of oil pump 4 for the pressure value of adjustment oil system, so that it detects pressure value looks adaptation with the sensor malleation that awaits measuring, and then annotates oil pressurization in to testboard 2.
The pressure gauge 5 is connected with the test board 2 and used for detecting and displaying pressure values in the test board 2 in real time so as to obtain the pressure values of the sensor to be detected, and then positive pressure and negative pressure tightness detection is carried out on the sensor to be detected according to the change of the pressure values. Specifically, manometer 5 can be linked together through the management with testboard 2 to detect under the vacuum test environment and the pressure under the oil pressure test environment, but real-time detection pressure value, the pressure numerical value of the sensor that awaits measuring of real-time display promptly, and then realize the detection of the sensor leakproofness that awaits measuring.
The control panel 6 is respectively connected with the vacuum pump 3 and the oil pump 4 and used for controlling the starting and stopping of the vacuum pump 3 and the oil pump 4. Specifically, a start-stop signal, a pressure set value and the like can be acquired through the control screen 6, and start and stop of the vacuum pump 3 and the oil pump 4 are controlled according to the acquired signals, of course, the control screen 6 can also be connected with the pressure gauge 5, so that when a pressure value detected by the pressure gauge 5 reaches a set value, stopping of the vacuum pump 3 and the oil pump 4 can be controlled, especially, when a pressure value detected by the pressure gauge 5 reaches a set preset negative pressure, the vacuum pump 3 can be controlled to stop vacuumizing, and when a pressure value detected by the pressure gauge 5 reaches a set preset positive pressure, the oil pump 4 can be controlled to stop oiling and pressurizing; of course, the control panel 6 may be connected to valve groups such as the hydraulic valve 41 and the exhaust valve 31 to control the valve groups. Wherein, the control screen 6 can be provided with a pressurizing button, a vacuumizing button, and an acquisition input structure for presetting negative pressure and positive pressure.
In this embodiment, for the accuracy that improves the detection, preferably, testboard 2 can be a plurality ofly to, mutual independence between each testboard 2 to independently carry out the malleation or the negative pressure leakproofness of a plurality of sensors that await measuring and detect, every independent testboard possesses vacuum test function and oil pressure test function simultaneously, can independently accomplish the leakproofness testing of 6 sensors simultaneously, can effectively improve detection efficiency. The device can realize detecting simultaneously, for example the part can carry out the positive pressure leakproofness and detect, and the part carries out the negative pressure leakproofness and detects, also can carry out positive pressure or negative pressure leakproofness simultaneously and detect, not only can ensure the accuracy of test, tests under same external environment, still can improve the efficiency that detects simultaneously. In the embodiment, six test benches 2 are taken as an example for description, and of course, other numbers are possible, and no limitation is made in this embodiment.
In this embodiment, the test board 2 may further include an exhaust pipe and an oil drain pipe, the exhaust pipe is provided with an exhaust valve, and the oil drain pipe is provided with an oil drain valve. As shown in fig. 7, DT1 is an electromagnet in the process of filling oil into the device, when J1 is closed, the oil pump is started, DT1 is attracted, and the device starts to fill oil; DT2 is an electromagnet in the oil drainage process, DT2 is attracted when J2 is closed, the oil injection of the device is stopped, and the oil drainage is started. Wherein, J1 and J2 can be switches of corresponding routes respectively.
In this embodiment, as shown in fig. 6, when performing a negative pressure test, a sensor to be tested is reliably fixed on the test platform 2 by a nut, the oil pressure valve 41 and the exhaust valve are closed, the vacuum valve 31 is opened, then the vacuum pump 3 is started through the control panel 6 to evacuate, after the pressure reaches a required value, for example, a preset positive pressure, the vacuum pump 3 is automatically stopped, each vacuum valve 31 is sequentially closed, data displayed by the corresponding pressure gauge 5 in each time period is recorded, and finally, whether the tested sensor is qualified or not is determined according to a change in pressure value in a specified time; when a positive pressure test is carried out, a sensor to be tested is reliably fixed on a test board 2 by using a nut, a vacuum valve 31 and an oil drain valve are closed, an oil pressure valve 41 and an exhaust valve are opened, then an oil pump 4 is started through a control screen 6, an overflow valve is adjusted to enable an oil system to reach a required pressure value, a pressurizing button on the control screen 6 is pressed to start oil injection and pressurization, after oil discharged by an exhaust pipe has no bubbles, the corresponding exhaust valve is closed, the oil pump 4 automatically stops after the pressure reaches the required value, each oil pressure valve 41 is closed in sequence, data displayed by a corresponding pressure gauge 5 in each time period is recorded, and finally whether a tested workpiece is qualified or not is judged according to the change of the pressure value in a specified time. After the test is finished, the oil drain valve is opened to drain oil and release pressure quickly so as to ensure the personal safety of the testing personnel.
In summary, the device for detecting the sealing performance of the built-in sensor provided by the embodiment provides a built-in closed detection environment of the sensor to be detected through the test board 2; vacuumizing through a vacuum pump to enable the test board 2 to be in a negative pressure state, further enabling the sensor to be tested to be in a negative pressure environment, recording the change of the pressure value of the pressure gauge 5 within a specified time, detecting the negative pressure tightness of the built-in sensor, and judging whether the negative pressure tightness of the sensor to be tested is qualified; through oil pump 4 in the oiling pressurization to be in the malleation state in making testboard 2, and then make the sensor that awaits measuring be in the malleation environment, with according to the change of 5 pressure values of record manometer in the stipulated time, detect the malleation leakproofness of built-in sensor, judge whether the sensor malleation leakproofness of being surveyed is qualified. The device can be used for detecting the sealing performance of the built-in ultrahigh frequency sensor of the GIS and the built-in ultrahigh frequency sensor of the transformer, and is very wide in application. Meanwhile, the device also comprehensively applies an automatic control technology and a pressure test principle, can carry out vacuum test, namely negative pressure test, on the tightness of the sensor to be tested by pumping vacuum, and can carry out oil pressure test, namely positive pressure test, on the tightness of the sensor to be tested by injecting oil and pressurizing, so that the device is simple to operate and convenient to detect.
The method comprises the following steps:
the invention also provides a built-in sensor tightness detection method, which adopts the built-in sensor tightness detection device to carry out positive pressure tightness detection and negative pressure tightness detection; wherein,
the detection of the negative pressure tightness is specifically as follows: the method comprises the steps of installing a sensor to be detected on a test board in a built-in mode, vacuumizing the test board by using a vacuum pump until a pressure gauge arranged on the test board displays that the pressure is lower than a preset negative pressure, acquiring a first vacuum value of the pressure gauge after a first time period, acquiring a second vacuum value of the pressure gauge after a second time period, determining the difference between the second vacuum value and the first vacuum value, comparing the difference with a negative pressure detection threshold value, and judging whether the negative pressure tightness of the sensor is qualified.
Specifically, first, as shown in fig. 5, a sensor to be measured, for example, a built-in uhf sensor, is mounted on the adapter flange 22 of the test stand 2, the oil pressure valve 41 and the exhaust valve are closed, and the vacuum valve 31 is opened. Then, the vacuum pump 4 is started through the control screen 6, the test board is vacuumized by the vacuum pump 3 until the pressure is lower than the preset negative pressure, the vacuum pump 4 and the valves connected with the vacuum pump 4 are closed, the vacuum pump 4 and the vacuum valves 41 can be controlled to stop automatically through the control screen 6, the sensor to be measured can be in a negative pressure environment, and the pressure of the negative pressure environment is lower than the preset negative pressure. Finally, after the vacuumizing is stopped, a first vacuum value P1 of the pressure gauge is obtained after a first time period is separated, a second vacuum value P2 of the pressure gauge is obtained after a second time period is separated, the difference between the second vacuum value P2 and the first vacuum value P1 is determined, the difference between the second vacuum value P2 and the first vacuum value P1 is compared with a negative pressure detection threshold value, and whether the negative pressure tightness of the sensor is qualified is judged; for example, the vacuum value P1 can be read after 1h, the second vacuum value P2 can be read after 1.5h, the difference between P2 and P1 is compared with 0.2kPa, if the difference is less than 0.2kPa, the negative pressure sealing performance of the sensor is judged to be qualified, otherwise, the negative pressure sealing performance of the sensor is judged to be unqualified. And after the second vacuum value is obtained, namely after the test is finished, opening the exhaust valve to quickly intake air. That is to say, in this embodiment, the first time period may be 1h, the second time period is 0.5 h, the preset negative pressure may be 0.3kPa, the negative pressure detection threshold is 0.2kPa, or other values may be used, which is not limited in this embodiment.
The positive pressure tightness detection specifically comprises the following steps: the method comprises the steps of injecting oil into a test board by using an oil pressure pump, pressurizing, closing an exhaust valve after the oil discharged by an exhaust pipe has no bubbles until the pressure displayed by a pressure gauge arranged on the test board reaches a preset positive pressure, acquiring a first pressure value of the pressure gauge after a first time period, acquiring a second pressure value of the pressure gauge after a second time period, determining the difference between the second pressure value and the first pressure value, comparing the difference between the second pressure value and the first pressure value with a positive pressure detection threshold value, and judging whether the negative pressure tightness of the sensor is qualified.
Specifically, as shown in fig. 5, a sensor to be tested, for example, a built-in uhf sensor, is mounted on the adapter flange 22 of the test stand 2, the vacuum valve 31 and the oil drain valve are closed, the oil pressure valve 41 and the exhaust valve are opened, then the oil pump 4 is started through the control panel 6, the overflow valve is adjusted to make the oil system reach a required pressure value, the pressurizing button on the control panel 6 is pressed to start oil injection and pressurization, after the oil discharged from the exhaust pipe has no bubbles, the corresponding exhaust valve is closed, after the pressure reaches a required value, that is, a preset positive pressure, the oil pump 4 or the oil pump 4 is stopped automatically, the oil pressure valves 41 are closed in sequence, data displayed by the corresponding pressure gauges 5 in each time period are recorded, and finally, whether the tested workpiece is qualified is judged according to the change of the pressure value in a specified time; for example, a first pressure value of the pressure gauge may be obtained after a first time period, a second pressure value of the pressure gauge may be obtained after a second time period, a difference between the second pressure value and the first pressure value may be determined, and the difference between the second pressure value and the first pressure value may be compared with a positive pressure detection threshold value to determine whether the negative pressure sealing performance of the sensor is qualified. After the test is finished, the oil drain valve is opened to drain oil and release pressure quickly so as to ensure the personal safety of the testing personnel.
The built-in sensor tightness detection device has the advantages, so the method for detecting the tightness by adopting the built-in sensor tightness detection device also has corresponding technical effects.
It should be noted that in the description of the present invention, the terms of direction or positional relationship indicated by the terms "upper", "lower", "left", "right", "inner", "outer", etc. are based on the directions or positional relationships shown in the drawings, which are only for convenience of description, and do not indicate or imply that the device or element must have a specific orientation, be constructed in a specific orientation, and be operated, and thus, should not be construed as limiting the present invention.
Furthermore, it should be noted that, in the description of the present invention, unless otherwise explicitly specified or limited, the terms "mounted," "connected," and "connected" are to be construed broadly, and may be, for example, fixedly connected, detachably connected, or integrally connected; they may be connected directly or indirectly through intervening media, or they may be interconnected between two elements. The specific meanings of the above terms in the present invention can be understood by those skilled in the art according to specific situations.
It will be apparent to those skilled in the art that various changes and modifications may be made in the present invention without departing from the spirit and scope of the invention. Thus, if such modifications and variations of the present invention fall within the scope of the claims of the present invention and their equivalents, the present invention is also intended to include such modifications and variations.
Claims (10)
1. A built-in sensor tightness detection device is characterized by comprising:
a base;
the test bench is arranged on the base and used for providing a built-in closed detection environment of the sensor to be detected;
the vacuum pump is communicated with the test board and used for vacuumizing to enable the interior of the test board to be in a negative pressure state, and further enable the sensor to be tested to be in a negative pressure environment;
the oil pump is communicated with the test board and is used for injecting oil and pressurizing to enable the interior of the test board to be in a positive pressure state, so that the sensor to be tested is in a positive pressure environment;
and the pressure gauge is connected with the test board and used for detecting and displaying the pressure value in the test board in real time so as to obtain the pressure value of the sensor to be detected, and further carrying out positive pressure and negative pressure tightness detection on the sensor to be detected according to the change of the pressure value.
2. The in-line sensor leak tightness detection device according to claim 1,
the vacuum pump is communicated with the test board through a vacuum pipeline, and a vacuum valve is arranged on the vacuum pipeline and used for controlling the opening and closing of the vacuum pipeline.
3. The in-line sensor leak tightness detection device according to claim 1,
the oil pump with be linked together through the oil pressure pipeline between the testboard, and, be equipped with the vacuum valve on the oil pressure pipeline, be used for control opening and closing of oil pressure pipeline.
4. The in-line sensor leak tightness detection device according to claim 1 or 2,
the test board is provided with a mounting hole, and the mounting hole is provided with a switching flange for connecting the sealing flange and the sensor flange, so that a sensor to be tested is internally arranged in the test board.
5. The in-line sensor leak tightness detection device according to claim 1 or 2,
the test bench is a plurality of to, each mutually independent between the test bench to independently carry out the positive pressure or negative pressure leakproofness detection of a plurality of sensors that await measuring.
6. The in-line sensor leak tightness detecting device according to claim 1 or 2, further comprising:
and the control screen is respectively connected with the vacuum pump and the oil pump and used for controlling the starting and stopping of the vacuum pump and the oil pump.
7. The built-in sensor tightness detection device according to claim 1 or 2, characterized in that the test bench is connected with an oil relief valve and an exhaust valve.
8. The built-in sensor tightness detection device according to claim 1 or 2, wherein the vacuum valve is a mixing shut-off valve.
9. The built-in sensor tightness detection device according to claim 1 or 2, wherein the test platform is made of stainless steel.
10. A built-in sensor sealing performance detection method characterized by carrying out positive pressure sealing performance detection and negative pressure sealing performance detection by using the built-in sensor sealing performance detection device according to any one of claims 1 to 9; wherein,
the negative pressure tightness detection specifically comprises the following steps: installing a sensor to be detected on a test bench in a built-in mode, vacuumizing the test bench by adopting a vacuum pump until a pressure gauge arranged on the test bench displays that the pressure is lower than a preset negative pressure, acquiring a first vacuum value of the pressure gauge after a first time interval, acquiring a second vacuum value of the pressure gauge after a second time interval, determining the difference between the second vacuum value and the first vacuum value, comparing the difference with a negative pressure detection threshold value, and judging whether the negative pressure tightness of the sensor is qualified or not;
the positive pressure tightness detection specifically comprises the following steps: the method comprises the steps of injecting oil into a test board by using an oil pressure pump, pressurizing, closing an exhaust valve after the oil discharged by an exhaust pipe has no bubbles until the pressure displayed by a pressure gauge arranged on the test board reaches a preset positive pressure, acquiring a first pressure value of the pressure gauge after a first time period, acquiring a second pressure value of the pressure gauge after a second time period, determining the difference between the second pressure value and the first pressure value, comparing the difference between the second pressure value and the first pressure value with a positive pressure detection threshold value, and judging whether the negative pressure tightness of the sensor is qualified.
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| CN202111161541.9A CN114812964A (en) | 2021-09-30 | 2021-09-30 | Built-in sensor sealing detection device and method |
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| CN202111161541.9A CN114812964A (en) | 2021-09-30 | 2021-09-30 | Built-in sensor sealing detection device and method |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN115656787A (en) * | 2022-12-21 | 2023-01-31 | 巨翊医疗科技(苏州)有限公司 | Testing device and method for PCBA with negative pressure sensor and infrared sensor |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN115656787A (en) * | 2022-12-21 | 2023-01-31 | 巨翊医疗科技(苏州)有限公司 | Testing device and method for PCBA with negative pressure sensor and infrared sensor |
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