CN115389126B - Modularized comparison type gas meter tightness automatic detection method and device - Google Patents
Modularized comparison type gas meter tightness automatic detection method and device Download PDFInfo
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- CN115389126B CN115389126B CN202211019679.XA CN202211019679A CN115389126B CN 115389126 B CN115389126 B CN 115389126B CN 202211019679 A CN202211019679 A CN 202211019679A CN 115389126 B CN115389126 B CN 115389126B
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- G—PHYSICS
- G01—MEASURING; TESTING
- 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 discloses a modularized comparison type gas meter tightness automatic detection method and equipment, comprising the following steps of 1, placing a detected meter; step 2, sealing a detected table; step 3, inflating; step 4, balancing the inflation pressure; step 5, primary differential pressure monitoring; step 6, monitoring secondary pressure difference; step 7, monitoring the temperature; step 8, correcting the gas pressure difference; step 9, detecting the air tightness of the detected meter; and step 10, the compression sealing mechanism releases the compression sealing of the vent of the inspected meter, the height of the lifting table of the inspected meter is lowered and reset, the inspected meter is removed, and the steps 1 to 9 are repeated to automatically detect the air tightness of the next inspected meter. The invention can eliminate the influence of temperature on pressure, has higher detection precision, and can not damage the gas meter by the detection by comparing with the standard meter. Can freely networking and expand and is easy to popularize and use in production lines.
Description
Technical Field
The invention relates to the field of gas meter tightness detection, in particular to a modularized comparison type gas meter tightness automatic detection method and equipment.
Background
At present, the gas meter has the problem of gas leakage or not, and mainly has the following two detection methods:
1. Wet detection: the test meter is soaked in water for detection. The disadvantage of this detection method is that: during the detection process, water may affect the quality of the gas meter.
2. Dry detection: and (3) filling compressed air with certain pressure into the detected meter, and observing the pressure change in the detected meter through the pressure meter, so as to judge the leakage degree of the detected meter. The disadvantages of this detection method are: the temperature is greatly influenced, and misjudgment is easy.
The invention is a Chinese patent with the application number of CN200810059910.1, the name of which is an instrument tightness detection method and a detection device thereof, and a gas meter to be detected is arranged in a sealed container during detection; sealing a pipe orifice of the gas meter to be detected, connecting the pipe orifice with an air flow detection port arranged outside the sealed container through a guide pipe, and leading out the air pressure in the gas meter to be detected; then sealing the sealed container and vacuumizing; and finally, observing the pressure change in the meter through the airflow detection port, and comparing the pressure change with a standard meter to judge the tightness of the meter.
The above patent application, namely, the test method of vacuum insulation temperature transmission, is used for detecting the tightness of the gas meter. The detection method is complex, and the gas meter to be detected is required to be placed in a sealed container and vacuumized, so that the sealing detection requirement of the gas meter on an automatic production line cannot be met.
Disclosure of Invention
The invention aims to solve the technical problems of the prior art, and provides a modularized comparison type gas meter tightness automatic detection method and modularized comparison type gas meter tightness automatic detection equipment.
In order to solve the technical problems, the invention adopts the following technical scheme:
a modularized comparison type gas meter tightness automatic detection method and device comprise the following steps.
Step 1, placing a checked table: manually or automatically placing the inspected meter on an inspected meter jacking table corresponding to the detection station; at this time, the top of the test meter has two vents.
Step 2, sealing a checked table: the height of the lifting table of the detected meter rises, and the height of the detected meter rises synchronously with the lifting table until two air vents at the top of the detected meter are in compaction contact with two compaction sealing mechanisms positioned right above the lifting table of the detected meter; the two compaction sealing mechanisms are used for compacting and sealing the two air vents of the inspected meter.
Step 3, inflating: the gas paths of the inspected meter and the standard meter are communicated, and an inflation mechanism is adopted to inflate the inspected meter and the standard meter simultaneously, and when the inspected meter and the standard meter are inflated to the set pressure P value, the inflation is stopped;
Step 4, balancing inflation pressure: and after the inflation is completed, the air paths of the inspected meter and the standard meter are continuously kept communicated, so that the air pressure balance of the inspected meter and the standard meter is realized.
Step 5, primary differential pressure monitoring: the gas pressure difference in the detected meter and the standard meter is monitored in real time by adopting a pressure difference sensor, and when the monitored gas pressure difference is smaller than a set balance pressure threshold value and is stable in set time, the gas paths of the detected meter and the standard meter are disconnected, so that the gas paths in the detected meter and the standard meter are independent; meanwhile, the actual gas pressure difference when the inspected meter and the standard meter are disconnected is recorded as Δp 0.
Step 6, monitoring a secondary pressure difference: when the gas paths in the detected meter and the standard meter are independent, continuously using a differential pressure sensor to monitor the gas pressure difference in the detected meter and the standard meter in real time for t seconds, and recording that the gas pressure difference between the detected meter and the standard meter monitored at the moment is delta P 1; the actual gas pressure difference between the inspected table and the standard table is Δp, and:
ΔP＝ΔP1-ΔP0
step 7, temperature monitoring: the temperature sensor is adopted to monitor the gas temperature in the standard meter and the detected meter respectively, and T 1 is set as the gas temperature monitoring value in the standard meter; t 2 is the gas temperature monitoring value in the table under test.
Step 8, correcting the gas pressure difference: and (3) correcting the delta P obtained by monitoring in the step (6) according to the T 1 and the T 2 obtained by monitoring in the step (7), wherein the corrected value of the gas pressure difference between the detected table and the standard table is delta P ', and the calculation formula of delta P' is as follows:
ΔP′＝ΔP+0.00001(T2-T1)3+0.00131(T2-T1)2+0.05312(T2-T1)
step 9, air tightness detection of the detected table: and (3) comparing the delta P ' calculated in the step (8) with a set air tightness differential pressure threshold delta P 0, judging that the air tightness of the inspected table is qualified when the delta P ' is less than or equal to delta P 0, and judging that the air tightness of the inspected table is unqualified if the delta P ' is less than or equal to delta P 0.
And step 10, the compression sealing mechanism releases the compression sealing of the vent of the inspected meter, the height of the lifting table of the inspected meter is lowered and reset, the inspected meter is removed, and the steps 1 to 9 are repeated to automatically detect the air tightness of the next inspected meter.
In the step 9, the detection precision of the air tightness of the detected meter can reach 99.7% or more.
In the step 1, a robot is adopted to automatically place the inspected meter on the automatic transmission line on the inspected meter jacking table corresponding to the detection station.
A modularized comparison type automatic gas meter tightness detection device comprises a detection table, a robot, an automatic transmission line of a detected meter, a standard meter and an inflation mechanism.
The detection table is arranged on one side or two sides of the transmission line of the detected meter.
The detection tables comprise a frame and at least one detection station arranged on the frame.
Each detection station comprises a detected meter jacking table, a standard meter placing table and a pressing sealing mechanism.
The height of the table jacking table to be detected can be lifted, the table to be detected can be placed on the top of the table jacking table to be detected, and two air vents are formed in the top of the table to be detected.
The two pressing sealing mechanisms are arranged on the frame at the top of the lifting table of the detected meter, and the bottoms of the two pressing sealing mechanisms correspond to the positions of the two air vents of the detected meter.
The standard table placing table is arranged below the table jacking table to be checked and used for placing the standard table.
The inflation mechanism is used for inflating the standard meter and the inspected meter.
The inflation mechanism comprises a gas tank, an inflation main pipe and two paths of inflation branch pipes.
And the air vents of the standard meter and the inspected meter are respectively connected with one air charging branch pipe.
One end of the air charging main pipe is connected with the air tank, and the other end is respectively connected with the two paths of air charging branch pipes.
The air-charging main pipe is provided with a pressure regulating valve, an air-charging electromagnetic valve and an air-charging pressure sensor; one of the two air inflation branch pipes is provided with a balance electromagnetic valve.
The balance electromagnetic valve further comprises a differential pressure sensor, wherein two ends of the differential pressure sensor are respectively connected with two sides of the balance electromagnetic valve.
Temperature sensors are arranged on the two paths of inflation branch pipes.
The table jacking platform to be checked comprises a tray and a jacking driving device arranged at the bottom of the tray, wherein the jacking driving device is used for driving the height of the tray to rise and fall.
The compression sealing mechanism comprises an expansion driving device, a pull rod and an expansion sleeve.
The expansion sleeve is arranged at the bottom end of the pull rod, is a flexible sleeve and can be sleeved on the periphery of the vent of the detected meter.
The pull rod is a middle hole pipe, and the side wall of the pull rod is provided with an inflation inlet for inflating the vent.
The expansion driving device is arranged at the top end of the pull rod and used for expanding and tightly sealing the expansion sleeve to be adsorbed on the periphery of the vent hole of the inspected meter.
The invention has the following beneficial effects:
Compared with the prior art, the invention has the following characteristics and advantages:
1. The detection method of the invention eliminates the influence of temperature on pressure and can realize online detection. The existing test method cannot be compatible with two conditions of eliminating temperature errors and detecting on line. The invention balances the two, and the false detection rate is reduced from 0.5% to 0.3%;
2. the invention eliminates the leakage error of the equipment and the leakage of the gas meter tested at the same time by comparing the checked meter with the standard meter with equal volume.
3. The invention corrects the gas temperature in the detected table and the standard table through an algorithm, and the algorithm is summarized through long-term experiments and has guiding significance for actual production.
4. The detection equipment for n stations is composed of n modules freely, can be used for manual detection and automatic detection, is suitable for various beat requirements of various production lines, and is easy to popularize and use in various production lines.
5. The mechanism of the invention has reasonable design, the sealing of the expansion sleeve to the vent hole is completed through two-section actions, and the sealing is rapid and reliable.
6. The gas meter of the detection method can not be damaged by detection, and the gas meter can be ensured to be used continuously after the detection is completed.
Drawings
FIG. 1 shows a schematic structural diagram of the modular comparative gas meter tightness automatic detection device of the present invention.
Fig. 2 is an enlarged schematic view of the structure of the inspection station according to the present invention.
FIG. 3 shows a schematic diagram of automated detection of tightness of a modular comparison gas meter using manual work.
Fig. 4 shows a schematic structural diagram of a table jack-up table for a test in the present invention.
Fig. 5 shows a schematic structural view of the pressure tight sealing mechanism of the present invention.
Fig. 6 shows a schematic view of the pneumatic connection of the inflation mechanism.
The method comprises the following steps:
10. A detection table;
11. A frame;
12. a detected jacking table; 121. a tray; 122. jacking the air cylinder; 123. a guide rod;
13. A standard table placement table;
14. a compression sealing mechanism; 141. an expansion cylinder; 142. a pull rod; 143. expanding sleeve;
20. a robot;
30. A table to be checked; 31. a vent;
40. A standard table;
50. an inflation mechanism;
51. A gas tank;
52. an inflation manifold; 521. a pressure regulating valve; 522. a main inflation electromagnetic valve; 523. a gas-filled pressure sensor;
53. A standard meter inflation branch pipe;
531. balancing electromagnetic valves; 532. a differential pressure sensor; 533. a pressure release valve; 534. a standard meter temperature sensor;
54. the inflation branch pipe of the inspected meter; 541. a temperature sensor of the detected meter.
Detailed Description
The invention will be described in further detail with reference to the accompanying drawings and specific preferred embodiments.
In the description of the present invention, it should be understood that the terms "left", "right", "upper", "lower", etc. indicate orientations or positional relationships based on the orientations or positional relationships shown in the drawings, are merely for convenience in describing the present invention and simplifying the description, and do not indicate or imply that the apparatus or element being referred to must have a specific orientation, be configured and operated in a specific orientation, and "first", "second", etc. do not indicate the importance of the components, and thus are not to be construed as limiting the present invention. The specific dimensions adopted in the present embodiment are only for illustrating the technical solution, and do not limit the protection scope of the present invention.
As shown in fig. 1,2 and 3, a modular comparative gas meter tightness automatic detection device comprises a detection table 10, a robot 20, a detected meter automatic transmission line, a standard meter 40 and an inflation mechanism 50.
The transmission line of the inspected meter is used for automatic transmission of the inspected meter, and is not shown in the text.
The detection table is arranged on one side or two sides of the detected table transmission line, and the detected table positioned on the detected table transmission line is transferred to a detection station of the detection table through the robot.
The inspection stations each comprise a frame 11 and at least one inspection station disposed on the frame, and in this embodiment there are preferably 4 inspection stations.
Each detection station comprises a detected meter jacking table 12, a standard meter placing table 13 and a pressing sealing mechanism 14.
The height of the table jack can be raised and lowered, and the table 30 can be placed on top of the table jack.
As shown in fig. 4, the top of the test meter has two vents 31.
The table jacking table to be checked comprises a tray 121 and a jacking driving device arranged at the bottom of the tray, wherein the jacking driving device is used for driving the height of the tray to rise and fall. The jack driving device is preferably a jack cylinder 122, and may be a jack cylinder or the like instead.
Further, in order to improve the uniformity of the jacking of the test meter, a guide rod 123 is provided on the outer periphery of the jacking cylinder.
The two pressing sealing mechanisms are arranged on the frame at the top of the lifting table of the detected meter, and the bottoms of the two pressing sealing mechanisms correspond to the positions of the two air vents of the detected meter.
As shown in fig. 5, the compression seal mechanism includes an expansion drive, a tie rod 142 and an expansion sleeve 143.
The expansion sleeve is arranged at the bottom end of the pull rod, is a flexible sleeve and can be sleeved on the periphery of the vent of the detected meter.
The pull rod is a middle hole pipe, and the side wall of the pull rod is provided with an inflation inlet for inflating the vent.
The expansion driving device is arranged at the top end of the pull rod and used for expanding and tightly sealing the expansion sleeve to be adsorbed on the periphery of the vent hole of the inspected meter. The expansion driving device is preferably an expansion cylinder 141, and may be a jacking cylinder or the like instead.
The standard table placing table is arranged below the table jacking table to be checked and used for placing the standard table. The standard meter placing table is also provided with a compaction sealing mechanism for compacting and sealing the vent hole of the standard meter.
The inflation mechanism is used for inflating the standard meter and the inspected meter.
As shown in fig. 6, the inflation mechanism includes a gas tank 51, an inflation manifold 52, two-way inflation branch pipes, and a differential pressure sensor 532.
One end of the air charging main pipe is connected with the air tank, and the other end is respectively connected with the two paths of air charging branch pipes.
The inflation manifold is provided with a pressure regulating valve 521, an inflation solenoid valve 522, and an inflation pressure sensor 523.
The air vents of the standard meter and the inspected meter are respectively connected with one air charging branch pipe, the air charging branch pipe connected with the standard meter is a standard meter air charging branch pipe 53, and the air charging branch pipe connected with the inspected meter is an inspected meter air charging branch pipe 54.
Temperature sensors are arranged on the two paths of inflation branch pipes, namely a standard meter temperature sensor 534 and a detected meter temperature sensor 541. Wherein the standard meter temperature sensor 534 is used for detecting the gas temperature in the standard meter; the meter temperature sensor 541 detects a gas temperature in the meter to be inspected.
One of the branch inflation pipes is provided with a balance electromagnetic valve 531, and in this embodiment, the balance electromagnetic valve 531 is preferably arranged on the standard meter branch inflation pipe 53.
The two ends of the pressure difference sensor are respectively connected to the two sides of the balance electromagnetic valve and used for detecting the pressure difference of the two sides of the balance electromagnetic valve.
A modularized comparison type gas meter tightness automatic detection method comprises the following steps.
Step 1, placing a checked table: manually or automatically placing the inspected meter on an inspected meter jacking table corresponding to the detection station; at this time, the top of the test meter has two vents.
Step 2, sealing a checked table: the height of the lifting table of the detected meter rises, and the height of the detected meter rises synchronously with the lifting table until two air vents at the top of the detected meter are in compaction contact with two compaction sealing mechanisms positioned right above the lifting table of the detected meter; the two compaction sealing mechanisms are used for compacting and sealing the two air vents of the inspected meter.
Step 3, inflating: and communicating the air paths of the inspected meter and the standard meter, and simultaneously inflating the inspected meter and the standard meter by adopting an inflation mechanism, and stopping inflating when the inspected meter and the standard meter are inflated to the set pressure P value.
Step 4, balancing inflation pressure: and after the inflation is completed, the air paths of the inspected meter and the standard meter are continuously kept communicated, so that the air pressure balance of the inspected meter and the standard meter is realized.
Step 5, primary differential pressure monitoring: the gas pressure difference in the detected meter and the standard meter is monitored in real time by adopting a pressure difference sensor, and when the monitored gas pressure difference is smaller than a set balance pressure threshold value and is stable in set time, the gas paths of the detected meter and the standard meter are disconnected, so that the gas paths in the detected meter and the standard meter are independent; meanwhile, the actual gas pressure difference when the inspected meter and the standard meter are disconnected is recorded as Δp 0.
Step 6, monitoring a secondary pressure difference: when the gas paths in the detected meter and the standard meter are independent, continuously using a differential pressure sensor to monitor the gas pressure difference in the detected meter and the standard meter in real time for t seconds, and recording that the gas pressure difference between the detected meter and the standard meter monitored at the moment is delta P 1; the actual gas pressure difference between the inspected table and the standard table is Δp, and:
ΔP＝ΔP1-ΔP0
step 7, temperature monitoring: the temperature sensor is adopted to monitor the gas temperature in the standard meter and the detected meter respectively, and T 1 is set as the gas temperature monitoring value in the standard meter; t 2 is the gas temperature monitoring value in the table under test.
Step 8, correcting the gas pressure difference: and (3) correcting the delta P obtained by monitoring in the step (6) according to the T 1 and the T 2 obtained by monitoring in the step (7), wherein the corrected value of the gas pressure difference between the detected table and the standard table is delta P ', and the calculation formula of delta P' is as follows:
ΔP′＝ΔP+0.00001(T2-T1)3+0.00131(T2-T1)2+0.05312(T2-T1)
Step 9, air tightness detection of the detected table: and (3) comparing the delta P ' calculated in the step (8) with a set air tightness differential pressure threshold delta P 0, judging that the air tightness of the inspected table is qualified when the delta P ' is less than or equal to delta P 0, and judging that the air tightness of the inspected table is unqualified if the delta P ' is less than or equal to delta P 0. After the detection of the invention, the detection precision of the air tightness of the detected meter can reach 99.7% or more.
And step 10, the compression sealing mechanism releases the compression sealing of the vent of the inspected meter, the height of the lifting table of the inspected meter is lowered and reset, the inspected meter is removed, and the steps 1 to 9 are repeated to automatically detect the air tightness of the next inspected meter.
The invention can eliminate the influence of temperature on pressure, has higher detection precision, and can not damage the gas meter by the detection by comparing with the standard meter. Can freely networking and expand and is easy to popularize and use in production lines.
The preferred embodiments of the present invention have been described in detail above, but the present invention is not limited to the specific details of the above embodiments, and various equivalent changes can be made to the technical solution of the present invention within the scope of the technical concept of the present invention, and all the equivalent changes belong to the protection scope of the present invention.
Claims (10)
1. A modularized comparison type gas meter tightness automatic detection method is characterized in that: the method comprises the following steps:
Step 1, placing a checked table: manually or automatically placing the inspected meter on an inspected meter jacking table corresponding to the detection station; at this time, the top of the detected meter is provided with two air vents;
Step 2, sealing a checked table: the height of the lifting table of the detected meter rises, and the height of the detected meter rises synchronously with the lifting table until two air vents at the top of the detected meter are in compaction contact with two compaction sealing mechanisms positioned right above the lifting table of the detected meter; the two compaction sealing mechanisms are used for compacting and sealing the two air vents of the inspected meter;
step 3, inflating: the gas paths of the inspected meter and the standard meter are communicated, and an inflation mechanism is adopted to inflate the inspected meter and the standard meter simultaneously, and when the inspected meter and the standard meter are inflated to the set pressure P value, the inflation is stopped;
Step 4, balancing inflation pressure: after the inflation is completed, the air paths of the inspected meter and the standard meter are continuously kept communicated, so that the air pressure balance of the inspected meter and the standard meter is realized;
Step 5, primary differential pressure monitoring: the gas pressure difference in the detected meter and the standard meter is monitored in real time by adopting a pressure difference sensor, and when the monitored gas pressure difference is smaller than a set balance pressure threshold value and is stable in set time, the gas paths of the detected meter and the standard meter are disconnected, so that the gas paths in the detected meter and the standard meter are independent; meanwhile, the actual gas pressure difference when the detected meter and the standard meter are disconnected is recorded as DeltaP 0;
step 6, monitoring a secondary pressure difference: when the gas paths in the detected meter and the standard meter are independent, continuously using a differential pressure sensor to monitor the gas pressure difference in the detected meter and the standard meter in real time for t seconds, and recording that the gas pressure difference between the detected meter and the standard meter monitored at the moment is DeltaP 1; the actual gas pressure difference between the inspected table and the standard table is Δp, and:
△P＝△P1-△P0
step 7, temperature monitoring: the temperature sensor is adopted to monitor the gas temperature in the standard meter and the detected meter respectively, and T 1 is set as the gas temperature monitoring value in the standard meter; t 2 is a gas temperature monitoring value in a detected table;
step 8, correcting the gas pressure difference: and (3) correcting the delta P obtained by monitoring in the step (6) according to the T 1 and the T 2 obtained by monitoring in the step (7), wherein the corrected value of the gas pressure difference between the detected table and the standard table is delta P ', and the calculation formula of the delta P' is as follows:
△P′＝△P+0.00001(T2-T1)3+0.00131(T2-T1)2+0.05312(T2-T1)
Step 9, air tightness detection of the detected table: comparing the delta P 'calculated in the step 8 with a set air tightness differential pressure threshold delta P 0, judging that the air tightness of the detected table is qualified when delta P' is less than or equal to delta P 0, and judging that the air tightness of the detected table is unqualified if not;
And step 10, the compression sealing mechanism releases the compression sealing of the vent of the inspected meter, the height of the lifting table of the inspected meter is lowered and reset, the inspected meter is removed, and the steps 1 to 9 are repeated to automatically detect the air tightness of the next inspected meter.
2. The modular comparison gas meter tightness automatic detection method according to claim 1, characterized in that: in the step 9, the detection precision of the air tightness of the detected meter can reach 99.7% or more.
3. The modular comparison gas meter tightness automatic detection method according to claim 1, characterized in that: in the step 1, a robot is adopted to automatically place the inspected meter on the automatic transmission line on the inspected meter jacking table corresponding to the detection station.
4. A modular comparison gas meter tightness automatic detection device, based on the modular comparison gas meter tightness automatic detection method according to any of claims 1-3, characterized in that: the automatic transmission line comprises a detection table, a robot, a detected meter automatic transmission line, a standard meter and an inflation mechanism;
the detection table is arranged on one side or two sides of the transmission line of the detected meter;
the detection tables comprise a frame and at least one detection station arranged on the frame;
each detection station comprises a detected meter jacking table, a standard meter placing table and a compression sealing mechanism;
the height of the table jacking table to be detected can be raised and lowered, the table to be detected can be placed on the top of the table jacking table to be detected, and two air vents are formed in the top of the table to be detected;
The two pressing sealing mechanisms are arranged on the frame at the top of the lifting table of the detected meter, and the bottoms of the two pressing sealing mechanisms correspond to the positions of the two air vents of the detected meter;
The standard meter placing table is arranged below the tested meter jacking table and is used for placing the standard meter;
the inflation mechanism is used for inflating the standard meter and the inspected meter.
5. The modular, comparative gas meter leak tightness automatic detection device of claim 4, wherein: the inflation mechanism comprises a gas tank, an inflation main pipe and two paths of inflation branch pipes;
The air vents of the standard meter and the inspected meter are respectively connected with one path of air charging branch pipe;
one end of the air charging main pipe is connected with the air tank, and the other end is respectively connected with the two paths of air charging branch pipes.
6. The modular, comparative gas meter leak tightness automatic detection device of claim 5, wherein: the air-charging main pipe is provided with a pressure regulating valve, an air-charging electromagnetic valve and an air-charging pressure sensor; one of the two air inflation branch pipes is provided with a balance electromagnetic valve.
7. The modular, comparative gas meter tightness automated inspection apparatus of claim 6, wherein: the balance electromagnetic valve further comprises a differential pressure sensor, wherein two ends of the differential pressure sensor are respectively connected with two sides of the balance electromagnetic valve.
8. The modular, comparative gas meter tightness automatic detection device according to claim 5 or 7, characterized in that: temperature sensors are arranged on the two paths of inflation branch pipes.
9. The modular, comparative gas meter leak tightness automatic detection device of claim 4, wherein: the table jacking platform to be checked comprises a tray and a jacking driving device arranged at the bottom of the tray, wherein the jacking driving device is used for driving the height of the tray to rise and fall.
10. The modular, comparative gas meter leak tightness automatic detection device of claim 4, wherein: the compression sealing mechanism comprises an expansion driving device, a pull rod and an expansion sleeve;
The expansion sleeve is arranged at the bottom end of the pull rod, is a flexible sleeve and can be sleeved on the periphery of the vent hole of the detected meter;
the pull rod is a middle hole pipe, and the side wall of the pull rod is provided with an inflation inlet for inflating the vent;
the expansion driving device is arranged at the top end of the pull rod and used for expanding and tightly sealing the expansion sleeve to be adsorbed on the periphery of the vent hole of the inspected meter.
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| CN117848627B (en) * | 2024-03-06 | 2024-07-05 | 宁德时代新能源科技股份有限公司 | Airtightness detection method, equipment, storage medium, battery system and electrical device |
| CN120558482B (en) * | 2025-07-21 | 2025-10-31 | 宁波聚丰仪表股份有限公司 | A gas meter air tightness testing device |
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| CN108844692A (en) * | 2018-06-27 | 2018-11-20 | 董建礼 | A kind of pressure difference method detection diaphragm gas meter internal leakage device and operation method |
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