CN212844233U - High-precision air pressure leakage detection device - Google Patents
High-precision air pressure leakage detection device Download PDFInfo
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- CN212844233U CN212844233U CN202021868166.2U CN202021868166U CN212844233U CN 212844233 U CN212844233 U CN 212844233U CN 202021868166 U CN202021868166 U CN 202021868166U CN 212844233 U CN212844233 U CN 212844233U
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Abstract
A high-precision air pressure leakage detection device comprises an instrument box, a two-position two-way electromagnetic valve, a filtering pressure regulator, a pressure transmitter and a differential pressure transmitter; the two-position two-way electromagnetic valve, the filtering pressure regulator, the pressure transmitter and the differential pressure transmitter are arranged in the instrument box; the top of the upper surface of the instrument box is provided with an air inlet, and the two-position two-way electromagnetic valve comprises an air inlet on-off valve, a middle balance on-off valve, a first function conversion valve and a second function conversion valve; the air source, the air inlet, the filtering pressure regulator and the air inlet on-off valve are sequentially connected through an air pipe, and the air inlet on-off valve is sequentially connected with the testing piece and the sample piece through the air pipe respectively. Atmospheric pressure leak hunting equipment of high accuracy, structural design is reasonable, need use appearance piece and test piece when the atmospheric pressure leak hunting equipment of having solved among the prior art pressure variation method detects, problem that just can not detect when not having appearance piece, the flexibility is better, detects the precision height.
Description
Technical Field
The utility model relates to an airtight detection technical field, concretely relates to atmospheric pressure leak hunting equipment of high accuracy.
Background
With the continuous progress of scientific technology, the air tightness detection technology is gradually paid attention to by people as an indispensable basic technology in the quality control of industrial sealing devices, and plays an increasingly important role in ensuring the quality performance and the use safety of sealing products. In various aspects of chemical industry, aerospace, automobiles, nuclear power plants, national defense industry, food safety, environmental protection and the like, any potential or existing tiny leakage can cause safety accidents. The harm caused by gas leakage is great, which can cause great economic loss and also can endanger life, and especially the damage of the toxic and harmful substance leakage to the ecological environment can not be recovered.
The correctness and effectiveness of the application of the tightness-detecting technique depends on the one hand on the experience and the abilities of the detecting personnel, but to a large extent on the level of the technique and the equipment employed. Tightness testing many methods have been developed based on different testing principles. Currently, widely used airtightness detection methods at home and abroad include a bubble method, a pressure change method, a trace gas method, a flow method, an ultrasonic method, and the like. In the prior art, the adopted air tightness detection method of the air pressure leakage detection equipment for air tightness detection is generally unique, and the flexibility is poor. For example, in a pressure leak detection apparatus using a pressure variation method, a sample piece and a test piece are used for simultaneous detection of inflation of the sample piece and the test piece, and detection cannot be performed without the sample piece. Therefore, in order to solve the above problems, it is necessary to develop a high-precision air pressure leak detection apparatus.
Chinese patent application No. CN201921235243.8 discloses a handcart fire extinguisher air pressure leak detection device, which is used for air pressure leak detection of handcart fire extinguishers, has poor universality, and does not solve the problems that the air tightness detection method adopted by the air pressure leak detection device for air tightness detection in the prior art is generally unique and has poor flexibility.
SUMMERY OF THE UTILITY MODEL
Utility model purpose: in order to overcome not enough above, the utility model aims at providing a atmospheric pressure leak hunting equipment of high accuracy, structural design is reasonable, the simple operation, and intelligent degree is high, need use appearance piece and test piece when the atmospheric pressure leak hunting equipment of having solved among the prior art pressure variation method detects, problem that just can not detect when not having appearance piece, and the flexibility is better, detects the precision height.
The technical scheme is as follows: a high-precision air pressure leakage detection device comprises an instrument box, a two-position two-way electromagnetic valve, a filtering pressure regulator, a pressure transmitter and a differential pressure transmitter; the two-position two-way electromagnetic valve, the filtering pressure regulator, the pressure transmitter and the differential pressure transmitter are arranged in the instrument box; the top of the upper surface of the instrument box is provided with an air inlet, and the two-position two-way electromagnetic valve comprises an air inlet on-off valve, a middle balance on-off valve, a first function conversion valve and a second function conversion valve; the air source, the air inlet, the filtering pressure regulator and the air inlet on-off valve are sequentially connected through an air pipe, and the air inlet on-off valve is respectively and sequentially connected with the test piece and the sample piece through the air pipe; the test piece is connected with the sample piece through an air pipe, and an intermediate balance on-off valve is arranged on the air pipe between the test piece and the sample piece; the test piece, the pressure transmitter, the first function conversion valve and the differential pressure transmitter are sequentially connected through an air pipe; the sample piece, the function conversion valve II and the differential pressure type transmitter are sequentially connected through an air pipe.
Atmospheric pressure leak hunting equipment of high accuracy, structural design is reasonable, the simple operation, intelligent degree is high, need use appearance piece and test piece when the atmospheric pressure leak hunting equipment of pressure variation method detects among the prior art, problem that just can not detect when not having appearance piece, the flexibility is better, detects the precision height.
The working process is as follows: (1) the sample piece and the test piece both have: the air inlet on-off valve is electrified, and air of an air source enters the test piece and the sample piece from the air inlet and the filtering pressure regulator through the air pipe; when the required pressure value is reached, the air inlet on-off valve loses power, and air inlet is stopped; after the air pressure values in the test piece and the sample piece are balanced, the middle balance on-off valve is electrified, the gas in the test piece and the gas in the sample piece are separated, pressure is maintained according to set time, the differential pressure transmitter outputs a differential pressure value, when the differential pressure value is within a certain range, the air tightness state is OK, otherwise, the air tightness state is NG; (2) when the direct detection test piece has no sample piece, the first function conversion valve and the second function conversion valve are electrified to seal the air inlet of the differential pressure type transmitter, the middle balance on-off valve is electrified, the side port of the sample piece is sealed, and the air inlet on-off valve is electrified to start air inlet. Stopping air intake when the air pressure value in the test piece reaches a set value; and after the pressure is maintained for the set time, the pressure transmitter outputs a pressure difference value, wherein the air tightness state is OK when the pressure difference value is immediately described, and the air tightness state is NG when the pressure difference value is not described.
Further, the high-precision air pressure leakage detection device comprises a controller, wherein the controller is installed inside the instrument box; the controller is respectively electrically connected with the air inlet on-off valve, the middle balance on-off valve, the first function conversion valve and the second function conversion valve and controls the power on or power off of the air inlet on-off valve, the middle balance on-off valve, the first function conversion valve and the second function conversion valve; and the pressure transmitter and the differential pressure transmitter are respectively in signal connection with the controller.
Pressure transmitter adopts intelligent pressure transmitter, and the precision is 0.1%, differential pressure transmitter adopts high accuracy differential pressure transmitter, and the precision is 0.075%. The controller is used for controlling the power on or power off of the air inlet on-off valve, the middle balance on-off valve, the function switching valve I and the function switching valve II; the pressure transmitter and the differential pressure transmitter generate voltage signals of differential pressure, the voltage signals are converted and amplified by the acquisition module to form digital signals capable of being processed by the controller, the signals are transmitted to the controller, the controller judges according to a set differential pressure value range, when the differential pressure value is within the set differential pressure value range, the airtightness state is OK, and otherwise, the airtightness state is NG.
Furthermore, foretell atmospheric pressure leak hunting equipment of high accuracy still includes the touch-sensitive screen, the touch-sensitive screen is installed on the instrument box outer wall that openly, touch-sensitive screen, controller signal connection.
The operator can set and operate the controller through the touch screen, otherwise, the controller displays the current detection result through the touch screen.
Further, foretell atmospheric pressure leak hunting equipment of high accuracy still includes supply socket, supply socket installs on instrument box back outer wall, supply socket is connected with the power, the power is two-position two-way solenoid valve, filters voltage regulator, pressure transmitter, differential changer, controller, touch-sensitive screen power supply.
Further, the above-mentioned high accuracy atmospheric pressure leak hunting equipment, install the switch on the instrument box front outer wall and be located the touch-sensitive screen right side, the switch is connected with supply socket and is used for controlling closing or opening of power.
Further, in the high-precision air pressure leak detection apparatus, the intake on-off valve is a 2-bit 2-way electromagnetic valve 220V normally closed type, and the intermediate balance on-off valve, the first function switching valve, and the second function switching valve are all 2-bit 2-way electromagnetic valve 220V normally open types.
Furthermore, the high-precision air pressure leak detection device further comprises a TTS voice module, and the controller, the touch screen and the TTS voice module are sequentially connected.
When the differential pressure value is within a certain range, the controller judges that the differential pressure value is OK, otherwise, the differential pressure value is NG, the controller displays and broadcasts the current detection result through the touch screen and the TTS voice module, and the intelligence is improved.
The utility model has the advantages that: atmospheric pressure leak hunting equipment of high accuracy, structural design is reasonable, the simple operation, intelligent degree is high, need use appearance piece and test piece when the atmospheric pressure leak hunting equipment of pressure variation method among the prior art detects, problem that just can not detect when not having appearance piece, the flexibility is better, detects the precision height, application prospect is extensive.
Drawings
Fig. 1 is a top internal view of the high precision pneumatic leak detection apparatus of the present invention;
fig. 2 is a front view of the high-precision air pressure leak detection device of the present invention;
fig. 3 is a left-view internal view of the high-precision air pressure leak detection device of the present invention;
fig. 4 is a first schematic diagram of the high-precision air pressure leak detection device of the present invention;
fig. 5 is a schematic diagram of a high-precision air pressure leak detection device according to the present invention;
fig. 6 is a frame diagram of the high-precision air pressure leak detection device according to the present invention;
in the figure: the device comprises an instrument box 1, an air inlet 11, a two-position two-way electromagnetic valve 2, an air inlet on-off valve 21, a middle balance on-off valve 22, a function switching valve I23, a function switching valve II 24, a filtering pressure regulator 3, a pressure transmitter 4, a differential pressure transmitter 5, an air source 6, an air pipe 7, a controller 8, a touch screen 9, a switch 91, a TTS voice module 92, a power socket 10, a sample piece a and a test piece b.
Detailed Description
The invention will be further elucidated with reference to the accompanying figures 1-6 and the specific embodiments.
In the description of the present invention, it is to be understood that the terms "upper", "lower", "front", "rear", "left", "right", "top", "bottom", "inner", "outer", and the like indicate orientations or positional relationships based on the orientations or positional relationships shown in the drawings, and are only for convenience of description and simplicity of description, and do not indicate or imply that the device or element being referred to must have a particular orientation, be constructed and operated in a particular orientation, and therefore, should not be construed as limiting the present invention.
The high-precision air pressure leakage detection device with the structure shown in fig. 1, 2, 3, 4, 5 and 6 comprises an instrument box 1, a two-position two-way electromagnetic valve 2, a filtering pressure regulator 3, a pressure transmitter 4 and a differential pressure transmitter 5; the two-position two-way electromagnetic valve 2, the filtering pressure regulator 3, the pressure transmitter 4 and the differential pressure transmitter 5 are arranged inside the instrument box 1; the top of the upper surface of the instrument box 1 is provided with an air inlet 11, and the two-position two-way electromagnetic valve 2 comprises an air inlet on-off valve 21, a middle balance on-off valve 22, a first function switching valve 23 and a second function switching valve 24; the air source 6, the air inlet 11, the filtering pressure regulator 3 and the air inlet on-off valve 21 are sequentially connected through an air pipe 7, and the air inlet on-off valve 21 is respectively and sequentially connected with the test piece b and the sample piece a through the air pipe 7; the testing piece b is connected with the sample piece a through the air pipe 7, and the air pipe 7 between the testing piece b and the sample piece a is provided with a middle balance on-off valve 22; the test piece b, the pressure transmitter 4, the function conversion valve I23 and the differential pressure transmitter 5 are sequentially connected through an air pipe 7; the sample piece a, the function switching valve II 24 and the differential pressure type transmitter 5 are sequentially connected through the air pipe 7.
In addition, the instrument box also comprises a controller 8, wherein the controller 8 is installed inside the instrument box 1; the controller 8 is respectively electrically connected with the air inlet on-off valve 21, the middle balance on-off valve 22, the first function switching valve 23 and the second function switching valve 24 and controls the power on or power off of the air inlet on-off valve 21, the middle balance on-off valve 22, the first function switching valve 23 and the second function switching valve 24; the pressure transmitter 4 and the differential pressure transmitter 5 are respectively connected with the controller 8 through signals.
Further, still include touch-sensitive screen 9, touch-sensitive screen 9 installs on instrument box 1 front outer wall, touch- sensitive screen 9, 8 signal connection of controller.
In addition, still include supply socket 10, supply socket 10 installs on the outer wall of the 1 back of instrument box, supply socket 10 is connected with the power, the power is two-position two-way solenoid valve 2, filters voltage regulator 3, pressure transmitter 4, differential transmitter 5, controller 8, the 9 power supplies of touch-sensitive screen.
Further, a switch 91 is installed on the outer wall of the front face of the instrument box 1 and is located on the right side of the touch screen 9, and the switch 91 is connected with the power socket 10 and is used for controlling the power supply to be turned off or turned on.
Further, the intake on-off valve 21 is a 2-position 2-way solenoid valve 220V normally closed type, and the intermediate balance on-off valve 22, the first function switching valve 23, and the second function switching valve 24 are all 2-position 2-way solenoid valves 220V normally open types.
Further, the device further comprises a TTS voice module 92, and the controller 8, the touch screen 9 and the TTS voice module 92 are connected in sequence.
Examples
Based on the above structure, as shown in FIGS. 1 to 6.
Atmospheric pressure leak hunting equipment of high accuracy, structural design is reasonable, the simple operation, intelligent degree is high, need use sample a and test b when the atmospheric pressure leak hunting equipment of pressure variation method among the prior art detects, problem that just can not detect when not having sample an, the flexibility is better, detects the precision height.
The working process is as follows: 1 sample piece a and test piece b both have: the air inlet on-off valve 21 is electrified, and air of the air source 6 enters the test piece b and the sample piece a from the air inlet 11 and the filtering pressure regulator 3 through the air pipe 7; when the required pressure value is reached, the air inlet on-off valve 21 is de-energized, and air inlet is stopped; after the air pressure values in the test piece b and the sample piece 1 are balanced, the middle balance on-off valve 22 is electrified, the air in the test piece b and the air in the sample piece a are separated, pressure is maintained according to set time, the differential pressure transmitter 5 outputs a differential pressure value, when the differential pressure value is within a certain range, the air tightness state is OK, otherwise, the air tightness state is NG; 2 when the test piece b is directly detected without the sample piece a, the first function switching valve 23 and the second function switching valve 24 are electrified to seal the air inlet of the differential pressure type transducer, the middle balance on-off valve 22 is electrified, the side port of the sample piece is sealed, and the air inlet on-off valve 21 is electrified to start air inlet. Stopping air intake when the air pressure value in the test piece reaches a set value; after the pressure is maintained for a predetermined time, the pressure transmitter 4 outputs a differential pressure value indicating that the air tightness state is OK, and indicating that the air tightness state is NG.
Further, pressure transmitter 4 adopts intelligent pressure transmitter, and the precision is 0.1%, differential pressure transmitter 5 adopts high accuracy differential pressure transmitter, and the precision is 0.075%. The controller 8 is used for controlling the power on or power off of the air inlet on-off valve 21, the middle balance on-off valve 22, the first function switching valve 23 and the second function switching valve 24; the pressure transmitter 4 and the differential pressure transmitter 5 convert and amplify the voltage signals generating the differential pressure through the acquisition module to form digital signals capable of being processed by the controller 8 and transmit the signals to the controller 8, the controller 8 judges according to a set differential pressure value range, when the differential pressure value is within the set differential pressure value range, the airtightness state is OK, otherwise, the airtightness state is NG.
Further, the operator can set and perform other operations on the controller 8 through the touch screen 9, and otherwise, the controller 8 displays the current detection result through the touch screen 9.
Further, the device further comprises a TTS voice module 92, and the controller 8, the touch screen 9 and the TTS voice module 92 are connected in sequence. When the differential pressure value is within a certain range, the controller judges that the differential pressure value is OK, otherwise, the differential pressure value is NG, the controller 8 displays and broadcasts the current detection result through the touch screen 9 and the TTS voice module 92, and the intelligence is improved.
The preferred embodiments of the present invention have been described in detail with reference to the accompanying drawings, however, the present invention is not limited to the details of the above embodiments, and the technical concept of the present invention can be within the scope of the present invention to perform various simple modifications to the technical solution of the present invention, and these simple modifications all belong to the protection scope of the present invention.
It should be noted that the various technical features described in the above embodiments can be combined in any suitable manner without contradiction, and in order to avoid unnecessary repetition, the present invention does not need to describe any combination of the features.
In addition, the embodiments of the present invention can be arbitrarily combined with each other, and the same shall be regarded as the disclosure of the present invention as long as the idea of the present invention is not violated.
Claims (7)
1. A high-precision air pressure leakage detection device is characterized by comprising an instrument box (1), a two-position two-way electromagnetic valve (2), a filtering pressure regulator (3), a pressure transmitter (4) and a differential pressure transmitter (5); the two-position two-way electromagnetic valve (2), the filtering pressure regulator (3), the pressure transmitter (4) and the differential pressure transmitter (5) are arranged inside the instrument box (1); the top of the upper surface of the instrument box (1) is provided with an air inlet (11), and the two-position two-way electromagnetic valve (2) comprises an air inlet on-off valve (21), a middle balance on-off valve (22), a function switching valve I (23) and a function switching valve II (24); the air source (6), the air inlet (11), the filtering pressure regulator (3) and the air inlet on-off valve (21) are sequentially connected through an air pipe (7), and the air inlet on-off valve (21) is respectively and sequentially connected with the test piece and the sample piece through the air pipe (7); the test piece is connected with the sample piece through an air pipe (7), and an intermediate balance on-off valve (22) is arranged on the air pipe (7) between the test piece and the sample piece; the test piece, the pressure transmitter (4), the function conversion valve I (23) and the differential pressure transmitter (5) are sequentially connected through an air pipe (7); the sample piece, the function conversion valve II (24) and the differential pressure type transmitter (5) are sequentially connected through an air pipe (7).
2. The high precision pneumatic leak detection apparatus according to claim 1, further comprising a controller (8), said controller (8) being mounted inside the instrument box (1); the controller (8) is respectively electrically connected with the air inlet on-off valve (21), the middle balance on-off valve (22), the function switching valve I (23) and the function switching valve II (24) and controls the power on or power off of the air inlet on-off valve (21), the middle balance on-off valve (22), the function switching valve I (23) and the function switching valve II (24); and the pressure transmitter (4) and the differential pressure transmitter (5) are respectively in signal connection with the controller (8).
3. High-precision air pressure leak detection equipment according to claim 2, characterized by further comprising a touch screen (9), wherein the touch screen (9) is installed on the outer wall of the front surface of the instrument box (1), and the touch screen (9) and the controller (8) are in signal connection.
4. The high-precision air pressure leakage detection device according to claim 3, further comprising a power socket (10), wherein the power socket (10) is installed on the outer wall of the back face of the instrument box (1), the power socket (10) is connected with a power supply, and the power supply supplies power to the two-position two-way electromagnetic valve (2), the filtering pressure regulator (3), the pressure transmitter (4), the differential pressure transmitter (5), the controller (8) and the touch screen (9).
5. High-precision air pressure leak detection equipment according to claim 4, characterized in that a switch (91) is installed on the outer wall of the front surface of the instrument box (1) and is positioned at the right side of the touch screen (9), and the switch (91) is connected with a power socket (10) and is used for controlling the power supply to be turned off or turned on.
6. The high precision air pressure leak detection apparatus according to claim 1, wherein said intake on-off valve (21) is of 2-position 2-way solenoid valve 220V normally closed type, and said intermediate balanced on-off valve (22), function switching valve one (23), and function switching valve two (24) are all of 2-position 2-way solenoid valve 220V normally open type.
7. The high-precision air pressure leak detection device according to claim 3, characterized by further comprising a TTS voice module (92), wherein the controller (8), the touch screen (9) and the TTS voice module (92) are connected in sequence.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202021868166.2U CN212844233U (en) | 2020-09-01 | 2020-09-01 | High-precision air pressure leakage detection device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202021868166.2U CN212844233U (en) | 2020-09-01 | 2020-09-01 | High-precision air pressure leakage detection device |
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| Publication Number | Publication Date |
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| CN212844233U true CN212844233U (en) | 2021-03-30 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN202021868166.2U Active CN212844233U (en) | 2020-09-01 | 2020-09-01 | High-precision air pressure leakage detection device |
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| CN (1) | CN212844233U (en) |
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- 2020-09-01 CN CN202021868166.2U patent/CN212844233U/en active Active
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