CN115389126A - Modularized contrast type automatic detection method and equipment for gas meter sealing performance - Google Patents
Modularized contrast type automatic detection method and equipment for gas meter sealing performance Download PDFInfo
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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 discloses an automatic detection method and equipment for the sealing performance of a modular contrast type gas meter, which comprises the following steps of 1, placing a to-be-detected meter; step 2, sealing the detected meter; step 3, inflating; step 4, balancing the inflation pressure; step 5, primary pressure difference monitoring; step 6, monitoring the secondary differential pressure; step 7, monitoring temperature; step 8, correcting the gas pressure difference; step 9, detecting the air tightness of the detected meter; and 10, releasing the compression seal of the air vent of the detected meter by the compression seal mechanism, descending and resetting the height of the jacking table of the detected meter, removing the detected meter, repeating the steps 1 to 9, and automatically detecting the air tightness of the next detected meter. The invention can eliminate the influence of temperature on pressure, has higher detection precision, and can prevent the gas meter from being damaged by detection by comparing with a standard meter. Can be freely networked and expanded, and is easy to be popularized and used by a production line.
Description
Technical Field
The invention relates to the field of gas meter sealing performance detection, in particular to a modularized contrast type automatic gas meter sealing performance detection method and equipment.
Background
At present, the problem of whether a gas meter leaks gas mainly includes the following two detection methods:
1. wet detection: soaking the surface to be detected in water for detection. The disadvantages of this detection method are: in the detection process, water may affect the quality of the gas meter.
2. Dry detection: compressed air with certain pressure is filled in the detected meter, and then the pressure change in the detected meter is observed through the pressure gauge, so that the leakage degree of the detected meter is judged. The disadvantages of this detection method are: the temperature is greatly influenced, and misjudgment is easy.
The invention discloses a Chinese patent with the application number of CN200810059910.1, which is named as a method and a device for detecting the tightness of a meter, and during detection, a gas meter to be detected is placed in a sealed container; sealing the pipe orifice of the gas meter to be detected, and connecting the pipe orifice with a gas flow detection port arranged outside a sealed container through a guide pipe so as to lead out the air pressure in the gas meter to be detected; then the sealed container is sealed and vacuumized; and finally, observing the pressure change in the meter through an airflow detection port, and comparing the pressure change with a standard meter to judge the tightness of the meter.
The gas meter tightness detection method based on the vacuum isolation temperature transmission is used for detecting the tightness of the gas meter. The detection method is complex, and the gas meter to be detected needs 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 an automatic detection method and equipment for the sealing performance of a modular contrast type gas meter, which have high detection accuracy, cannot miss detection of any unqualified meter, cannot damage the gas meter during detection and can realize modular composition of n-station equipment on a production line.
In order to solve the technical problems, the invention adopts the technical scheme that:
a modularized contrast type automatic detection method and equipment for gas meter sealing performance comprise the following steps.
Step 1, placing a to-be-detected table: manually or automatically placing the detected meter on a detected meter jacking table corresponding to the detection station; in this case, the top of the meter under test has two vents.
Step 2, sealing the detected table: the height of the jacking table of the detected meter is raised, and the height of the detected meter is synchronously raised until two air vents at the top of the detected meter are in pressing contact with two pressing sealing mechanisms positioned right above the jacking table of the detected meter; the two compression sealing mechanisms are used for compressing and sealing the two air vents of the meter to be detected.
Step 3, inflating: communicating the gas paths of the detected meter and the standard meter, simultaneously inflating the detected meter and the standard meter by adopting an inflating mechanism, and stopping inflating when the detected meter and the standard meter are inflated to a set pressure P value;
step 4, balancing inflation pressure: after the inflation is finished, the air passages of the detected meter and the standard meter are continuously kept communicated, and the air pressure balance of the detected meter and the standard meter is realized.
Step 5, primary pressure difference monitoring: the method comprises the following steps that a differential pressure sensor is adopted to monitor the gas pressure difference between a detected meter and a standard meter in real time, and when the monitored gas pressure difference is smaller than a set balance pressure threshold value and is stable within set time, the gas circuit communication of the detected meter and the standard meter is disconnected, so that the gas circuits in the detected meter and the standard meter are independent; at the same time, the actual gas pressure difference Δ P when the test table and the standard table are disconnected is recorded 0 。
Step 6, secondary pressure difference monitoring: when the gas paths in the detected meter and the standard meter are independent, continuously using the 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 the monitored gas pressure difference between the detected meter and the standard meter as delta P 1 (ii) a The actual gas pressure difference between the inspected table and the standard table is Δ P, and:
ΔP＝ΔP 1 -ΔP 0
step 7, temperature monitoring: by temperature transmissionThe sensor respectively monitors the gas temperature in the standard meter and the gas temperature in the detected meter, and T is set 1 The gas temperature monitoring value in the standard table is obtained; t is 2 The gas temperature monitoring value in the detected table.
And 8, correcting gas pressure difference: monitoring the obtained T according to step 7 1 And T 2 If the Δ P monitored in step 6 is corrected, the correction value of the gas pressure difference between the detected table and the standard table is Δ P ', and the calculation formula of Δ P' is:
ΔP′＝ΔP+0.00001(T 2 -T 1 ) 3 +0.00131(T 2 -T 1 ) 2 +0.05312(T 2 -T 1 )
step 9, detecting the air tightness of the detected surface: comparing the calculated delta P' in the step 8 with the set air tightness pressure difference threshold delta P 0 Comparing, when the delta P' is less than or equal to delta P 0 And if not, judging that the air tightness of the detected table is unqualified.
And 10, releasing the compression seal of the air vent of the detected meter by the compression seal mechanism, descending and resetting the height of the jacking table of the detected meter, removing the detected meter, repeating the steps 1 to 9, and automatically detecting the air tightness of the next detected meter.
In step 9, the detection precision of the air tightness of the detected meter can reach 99.7 percent or more.
In the step 1, a robot is adopted to automatically place the detected meter on the automatic transmission line on the detected meter jacking table corresponding to the detection station.
The utility model provides an automatic check out test set of modularization contrast formula gas meter leakproofness, is including examining test table, robot, the automatic transmission line of examined table, standard table and aerifing the mechanism.
The detection platform is arranged on one side or two sides of the transmission line of the meter to be detected.
All include the frame and set up at least one detection station in the frame on detecting the platform.
Each detection station comprises a detected meter jacking table, a standard meter placing table and a pressing sealing mechanism.
The height of the jacking table of the checked meter can be lifted, the top of the jacking table of the checked meter can be used for placing the checked meter, and the top of the checked meter is provided with two air vents.
The two pressing sealing mechanisms are arranged on the rack at the top of the jacking table of the inspected meter, and the bottoms of the two pressing sealing mechanisms correspond to the positions of the two air ports of the inspected meter.
The standard meter placing table is arranged below the jacking table of the to-be-detected meter and used for placing the standard meter.
The inflation mechanism is used for inflating the standard meter and the checked meter.
The inflation mechanism comprises a gas tank, an inflation main pipe and two inflation branch pipes.
The air vents of the standard meter and the checked meter are respectively connected with an air inflation branch pipe.
One end of the inflation main pipe is connected with the gas tank, and the other end of the inflation main pipe is respectively connected with the two inflation branch pipes.
The inflation main pipe is provided with a pressure regulating valve, an inflation electromagnetic valve and an inflation pressure sensor; one path of the inflation branch pipe is provided with a balance electromagnetic valve.
The balance electromagnetic valve also comprises a differential pressure sensor, and two ends of the differential pressure sensor are respectively connected to two sides of the balance electromagnetic valve.
Temperature sensors are arranged on the two inflation branch pipes.
The jacking platform of the checked meter comprises a tray and a jacking driving device arranged at the bottom of the tray, and the jacking driving device is used for driving the tray to ascend and descend.
The pressing 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 and is a flexible sleeve which can be sleeved on the periphery of an air vent of the checked 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 air vent.
The expansion driving device is arranged at the top end of the pull rod and used for adsorbing the expansion sleeve in an expansion sealing mode on the periphery of the air vent 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 eliminates the influence of temperature on pressure and can realize on-line detection. The existing test methods cannot be compatible with two conditions of temperature error elimination and online detection. The invention achieves balance between the two, and the false detection rate is reduced from 0.5% to 0.3%;
2. the invention eliminates the leakage error of the device and the leakage of the gas meters tested at the same time by a method of comparing the detected meter with the standard meter with the same volume.
3. The gas temperature in the detected table and the standard table is measured, and the gas temperature is corrected through the algorithm which is summarized through long-term experiments, so that the method has guiding significance for actual production.
4. The detection equipment with n stations is formed by n modules freely, can be detected manually or automatically, is suitable for various beat requirements of various production lines, and is easy to popularize and use in various production lines.
5. The invention has reasonable mechanism design, completes the sealing of the air vent by the expansion sleeve through two-stage action, and has quick and reliable sealing.
6. The gas meter can not be damaged by detection by the detection method, and the gas meter can be continuously used after the detection is finished.
Drawings
Fig. 1 shows a schematic structural diagram of the automated detection equipment for leak tightness of the modular comparative gas meter according to the present invention.
FIG. 2 is an enlarged view of the inspection stage of the present invention.
Fig. 3 shows a schematic diagram of automated detection of the sealing performance of a modular comparative gas meter by human intervention.
Fig. 4 shows a schematic structural diagram of the jacking table of the meter to be tested in the invention.
Fig. 5 shows a schematic view of the structure of the press seal mechanism of the present invention.
FIG. 6 shows a schematic diagram of the pneumatic connections of the inflation mechanism.
Among them are:
10. a detection table;
11. a frame;
12. a jacking platform to be detected; 121. a tray; 122. jacking a cylinder; 123. a guide rod;
13. a standard meter placement table;
14. a pressing sealing mechanism; 141. expanding the air cylinder; 142. a pull rod; 143. expanding the 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 air inflation electromagnetic valve; 523. an inflation pressure sensor;
53. a standard gauge gas-filled branch pipe;
531. a balance solenoid valve; 532. a differential pressure sensor; 533. a pressure relief valve; 534. a reference meter temperature sensor;
54. inflating branch pipes of the checked meter; 541. and a temperature sensor of the detected meter.
Detailed Description
The present 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 is to be understood that the terms "left side", "right side", "upper part", "lower part", etc., indicate orientations or positional relationships based on those shown in the drawings, and are only for convenience of describing the present invention and simplifying the description, but do not indicate or imply that the referred device or element must have a specific orientation, be constructed in a specific orientation, and be operated, and that "first", "second", etc., do not represent an important degree of the component parts, and thus are not to be construed as limiting the present invention. The specific dimensions used in the present example are only for illustrating the technical solution and do not limit the scope of protection of the present invention.
As shown in fig. 1, fig. 2 and fig. 3, an automatic detection device for the sealing performance of a modular contrast gas meter comprises a detection table 10, a robot 20, an automatic transmission line for a tested meter, a standard meter 40 and an inflation mechanism 50.
The transmission line of the detected meter is used for automatic transmission of the detected meter and is not marked in the text.
The detection platform is arranged on one side or two sides of the detected meter transmission line, and the detected meter positioned on the detected meter transmission line is transferred to the detection station of the detection platform through the robot.
All include frame 11 and set up at least one detection station in the frame on detecting the platform, this embodiment is preferred to have 4 detection stations.
Each detection station comprises a table jacking platform 12 to be detected, a standard table placing platform 13 and a pressing sealing mechanism 14.
The height of the jacking table of the detected meter can be lifted, and the top of the jacking table of the detected meter can be used for placing the detected meter 30.
As shown in FIG. 4, the top of the meter to be tested has two vents 31.
The jacking table of the checked meter comprises a tray 121 and a jacking driving device arranged at the bottom of the tray, and the jacking driving device is used for driving the tray to ascend and descend. The jacking driving device is preferably a jacking cylinder 122, and alternatively, may be a jacking electric cylinder or the like.
Further, in order to improve the jacking consistency of the checked meter, a guide rod 123 is arranged on the periphery of the jacking cylinder.
The two pressing and sealing mechanisms are arranged on the rack at the top of the jacking table of the inspected meter, and the bottoms of the two pressing and sealing mechanisms correspond to the positions of the two air vents of the inspected meter.
As shown in fig. 5, the compression sealing mechanism includes an expansion driving device, a pull rod 142 and an expansion sleeve 143.
The expansion sleeve is arranged at the bottom end of the pull rod and is a flexible sleeve which can be sleeved on the periphery of an air vent of the checked 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 air vent.
The expansion driving device is arranged at the top end of the pull rod and used for adsorbing the expansion sleeve in an expansion sealing mode on the periphery of the air vent of the inspected meter. The expansion driving device is preferably an expansion cylinder 141, and alternatively, may be a jack cylinder or the like.
The standard meter placing table is arranged below the jacking table of the to-be-detected meter and used for placing the standard meter. The standard meter placing table is also provided with a pressing and sealing mechanism for pressing and sealing the standard meter vent.
The inflation mechanism is used for inflating the standard meter and the checked meter.
As shown in fig. 6, the inflation mechanism includes an air tank 51, an inflation manifold 52, two inflation branch pipes, and a differential pressure sensor 532.
One end of the inflation main pipe is connected with the gas tank, and the other end of the inflation main pipe is respectively connected with the two inflation branch pipes.
The inflation manifold is provided with a pressure regulating valve 521, an inflation solenoid valve 522 and an inflation pressure sensor 523.
And the air vents of the standard meter and the checked meter are respectively connected with one branch inflation pipe, the branch inflation pipe connected with the standard meter is a branch inflation pipe 53 of the standard meter, and the branch inflation pipe connected with the checked meter is a branch inflation pipe 54 of the checked meter.
Temperature sensors are arranged on the two inflation branch pipes, namely a standard meter temperature sensor 534 and a detected meter temperature sensor 541. 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 under test.
One of the branch inflation pipes is provided with a balance solenoid valve 531, and in this embodiment, the balance solenoid valve 531 is preferably arranged on the branch inflation pipe 53 of the standard gauge.
The two ends of the differential pressure sensor are respectively connected to the two sides of the balance electromagnetic valve and used for detecting the pressure difference between the two sides of the balance electromagnetic valve.
An automatic detection method for the sealing performance of a modular contrast type gas meter comprises the following steps.
Step 1, placing a to-be-detected table: manually or automatically placing the detected meter on a detected meter jacking table corresponding to the detection station; in this case, the top of the meter under test has two vents.
Step 2, sealing the detected table: the height of the jacking table of the detected meter is increased, and the height of the detected meter is synchronously increased until the two air vents at the top of the detected meter are in pressing contact with the two pressing sealing mechanisms positioned right above the jacking table of the detected meter; the two compressing and sealing mechanisms are used for compressing and sealing the two air vents of the meter to be detected.
Step 3, inflating: and communicating the air passages of the detected meter and the standard meter, simultaneously inflating the detected meter and the standard meter by adopting an inflating mechanism, and stopping inflating when the detected meter and the standard meter are inflated to a set pressure P value.
Step 4, balancing inflation pressure: after the inflation is finished, the air passages of the detected meter and the standard meter are continuously kept communicated, and the air pressure balance of the detected meter and the standard meter is realized.
Step 5, primary pressure difference monitoring: the method comprises the following steps of monitoring the gas pressure difference between a detected meter and a standard meter in real time by adopting a pressure difference sensor, and disconnecting the gas circuit communication of the detected meter and the standard meter when the monitored gas pressure difference is smaller than a set balance pressure threshold value and is stable within a set time, so that the gas circuits in the detected meter and the standard meter are independent; at the same time, the actual gas pressure difference Δ P when the test table and the standard table are disconnected is recorded 0 。
Step 6, secondary pressure difference monitoring: when the gas paths in the detected meter and the standard meter are independent, continuously using the 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 the monitored gas pressure difference between the detected meter and the standard meter as delta P 1 (ii) a The actual gas pressure difference between the inspected table and the standard table is Δ P, and:
ΔP＝ΔP 1 -ΔP 0
step 7, temperature monitoring: respectively monitoring the gas temperature in the standard meter and the gas temperature in the detected meter by adopting a temperature sensor, and setting T 1 The gas temperature monitoring value in the standard table is obtained; t is 2 The gas temperature monitoring value in the table to be detected.
And 8, correcting gas pressure difference: monitoring the obtained T according to step 7 1 And T 2 If the Δ P monitored in step 6 is corrected, the correction value of the gas pressure difference between the detected table and the standard table is Δ P ', and the calculation formula of Δ P' is:
ΔP′＝ΔP+0.00001(T 2 -T 1 ) 3 +0.00131(T 2 -T 1 ) 2 +0.05312(T 2 -T 1 )
step 9, detecting the air tightness of the detected surface: will be described in detail8 calculated delta P' and the set air tightness pressure difference threshold value delta P 0 Comparing, when the delta P' is less than or equal to delta P 0 If not, the air tightness of the detected meter is judged to be unqualified. After the detection of the invention, the detection precision of the air tightness of the detected meter can reach 99.7 percent or more.
And 10, releasing the compression seal of the air vent of the detected meter by the compression seal mechanism, descending and resetting the height of the jacking table of the detected meter, removing the detected meter, repeating the steps 1 to 9, and automatically detecting the air tightness of the next detected meter.
The invention can eliminate the influence of temperature on pressure, has higher detection precision, and can prevent the gas meter from being damaged by detection by comparing with a standard meter. Can be freely networked and expanded, and is easy to be popularized and used by a production line.
Although the preferred embodiments of the present invention have been described in detail, the present invention is not limited to the details of the embodiments, and various equivalent modifications can be made within the technical spirit of the present invention, and the scope of the present invention is also within the scope of the present invention.
Claims (10)
1. The utility model provides an automatic detection method of modularization contrast formula gas meter leakproofness which characterized in that: the method comprises the following steps:
step 1, placing a to-be-detected table: manually or automatically placing the detected meter on a detected meter jacking table corresponding to the detection station; at this time, the top of the checked meter is provided with two air vents;
step 2, sealing the detected table: the height of the jacking table of the detected meter is raised, and the height of the detected meter is synchronously raised until two air vents at the top of the detected meter are in pressing contact with two pressing sealing mechanisms positioned right above the jacking table of the detected meter; the two compressing and sealing mechanisms are used for compressing and sealing the two air vents of the meter to be detected;
step 3, inflating: communicating the gas paths of the detected meter and the standard meter, simultaneously inflating the detected meter and the standard meter by adopting an inflating mechanism, and stopping inflating when the detected meter and the standard meter are inflated to a set pressure P value;
step 4, balancing inflation pressure: after the inflation is finished, the gas circuit of the detected meter and the standard meter is continuously kept communicated, so that the air pressure balance of the detected meter and the standard meter is realized;
step 5, primary pressure difference monitoring: the method comprises the following steps of monitoring the gas pressure difference between a detected meter and a standard meter in real time by adopting a pressure difference sensor, and disconnecting the gas circuit communication of the detected meter and the standard meter when the monitored gas pressure difference is smaller than a set balance pressure threshold value and is stable within a set time, so that the gas circuits in the detected meter and the standard meter are independent; at the same time, the actual gas pressure difference Δ P when the test table and the standard table are disconnected is recorded 0 ；
Step 6, secondary pressure difference monitoring: when the gas paths in the detected meter and the standard meter are independent, continuously using the 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 the monitored gas pressure difference between the detected meter and the standard meter as delta P 1 (ii) a The actual gas pressure difference between the inspected table and the standard table is Δ P, and:
ΔP＝ΔP 1 -ΔP 0
step 7, temperature monitoring: respectively monitoring the gas temperature in the standard meter and the gas temperature in the detected meter by adopting a temperature sensor, and setting T 1 The gas temperature monitoring value in the standard table is obtained; t is 2 The gas temperature monitoring value in the detected table;
and 8, correcting gas pressure difference: monitoring the obtained T according to step 7 1 And T 2 If the Δ P monitored in step 6 is corrected, the correction value of the gas pressure difference between the detected table and the standard table is Δ P ', and the calculation formula of Δ P' is:
ΔP′＝ΔP+0.00001(T 2 -T 1 ) 3 +0.00131(T 2 -T 1 ) 2 +0.05312(T 2 -T 1 )
step 9, detecting the air tightness of the detected surface: comparing the delta P' calculated in the step 8 with the set air tightness pressure difference threshold value delta P 0 Comparing, when the delta P' is less than or equal to the delta P 0 If so, judging that the air tightness of the detected table is qualified, otherwise, judging that the air tightness of the detected table is unqualified;
and 10, releasing the compression seal of the air vent of the detected meter by the compression seal mechanism, descending and resetting the height of the jacking table of the detected meter, removing the detected meter, repeating the steps 1 to 9, and automatically detecting the air tightness of the next detected meter.
2. The automatic detection method for the sealing performance of the modular contrast gas meter according to claim 1, characterized in that: in step 9, the detection precision of the air tightness of the detected meter can reach 99.7 percent or more.
3. The automatic detection method for the sealing performance of the modular contrast gas meter according to claim 1, characterized in that: in the step 1, a robot is adopted to automatically place the detected meter on the automatic transmission line on the detected meter jacking table corresponding to the detection station.
4. The utility model provides an automatic check out test set of modularization contrast formula gas meter leakproofness which characterized in that: the automatic 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 platform is arranged on one side or two sides of the transmission line of the detected meter;
the detection tables respectively comprise a rack and at least one detection station arranged on the rack;
each detection station comprises a detected meter jacking table, a standard meter placing table and a pressing sealing mechanism;
the height of the jacking table of the to-be-detected meter can be lifted, the top of the jacking table of the to-be-detected meter can be used for placing the to-be-detected meter, and the top of the to-be-detected meter is provided with two air vents;
the two pressing sealing mechanisms are arranged on the rack at the top of the jacking table of the meter to be detected, and the bottoms of the two pressing sealing mechanisms correspond to the two air ports of the meter to be detected;
the standard meter placing table is arranged below the jacking table of the to-be-detected meter and used for placing the standard meter;
the inflation mechanism is used for inflating the standard meter and the checked meter.
5. The automated detection equipment of modular contrast gas meter sealing performance according to claim 4, characterized in that: the inflation mechanism comprises an air tank, an inflation main pipe and two inflation branch pipes;
the air vents of the standard meter and the checked meter are respectively connected with one branch air inflation pipe;
one end of the inflation main pipe is connected with the gas tank, and the other end of the inflation main pipe is respectively connected with the two inflation branch pipes.
6. The automated detection equipment of modular contrast gas meter sealing performance of claim 5, characterized in that: the inflation main pipe is provided with a pressure regulating valve, an inflation electromagnetic valve and an inflation pressure sensor; one path of the inflation branch pipe is provided with a balance electromagnetic valve.
7. The automated detection equipment of modular contrast gas meter sealing performance of claim 6, characterized in that: the balance electromagnetic valve also comprises a differential pressure sensor, and two ends of the differential pressure sensor are respectively connected to two sides of the balance electromagnetic valve.
8. The automated detection equipment of modular contrast gas meter sealing performance according to claim 5 or 7, characterized in that: temperature sensors are arranged on the two inflation branch pipes.
9. The automated detection equipment of modular contrast gas meter sealing performance of claim 4, characterized in that: the jacking platform of the checked meter comprises a tray and a jacking driving device arranged at the bottom of the tray, and the jacking driving device is used for driving the tray to ascend and descend.
10. The automated detection equipment of modular contrast gas meter sealing performance according to claim 4, characterized in that: the pressing 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 and is a flexible sleeve which can be sleeved on the periphery of an air vent of the checked 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 absorbing the expansion sleeve in an expansion sealing mode to the periphery of the air vent of the inspected meter.
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN117848627A (en) * | 2024-03-06 | 2024-04-09 | 宁德时代新能源科技股份有限公司 | Air tightness detection method, air tightness detection device, storage medium, battery system and electricity utilization device |
Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
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| JP2002156304A (en) * | 2000-11-15 | 2002-05-31 | Tokyo Gas Co Ltd | Gas meter and gas leak detection method |
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| CN101271034A (en) * | 2008-03-04 | 2008-09-24 | 海盐美捷测试仪器有限公司 | Gas meter leak tightness detecting method and device thereof |
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