Automatic detection and calibration system for gas meter

Abstract

The utility model belongs to the technical field of gas detection, and particularly discloses an automatic detection and calibration system for a gas meter, which comprises a test board for placing a gas meter to be detected, and a test calibration area formed by a limiting plate, a rear baffle plate and an inner supporting table is arranged on the test board; the position of the sealing assembly is adjusted according to the gas inlet direction of the to-be-tested gas meter, a positioning bolt is matched with a positioning hole in a positioning strip for fixation, and the position of the gas meter in a test calibration area is adjusted based on a gasket; the monitoring center automatically starts detection, an expansion piece and a small expansion piece in the sealing assembly are pressed downwards, the expansion piece is communicated with a gas inlet of the gas meter to be detected, and all starting switches are turned on for testing and calibration work; and after the test calibration work is finished, the pusher moves the to-be-tested gas meter to a downstream station on the left side of the test board, related product control parameters of the to-be-tested gas meter are sent to a corresponding application platform, and registration of the to-be-tested gas meter on the application platform is completed.

Description

Technical Field

[0001] This utility model relates to the field of gas detection technology, specifically an automated gas meter detection and calibration system. Background Technology

[0002] In the production process of gas meters, calibration and functional testing are two crucial steps. Calibration refers to verifying and adjusting the gas meter using specific equipment and methods to ensure its measurement accuracy. Functional testing, on the other hand, involves testing the various functional indicators of the gas meter to ensure its normal operation. Both steps are of great significance to the production quality and safe use of gas meters.

[0003] In existing technologies, calibration and functional testing are typically performed in separate processes. The calibration process uses a standard calibration stand specifically for calibrating gas meters. Functional testing, on the other hand, requires a custom-developed fixture specifically designed for testing the functionality and performance of gas meters. These two steps complete both the calibration and functional testing of the gas meter.

[0004] However, existing technologies have some problems in practical applications: First, since calibration and functional testing belong to different processes, this not only increases production costs but also reduces production efficiency. Second, existing technologies require operators to fill in specific test parameters during functional testing, which not only increases the operator's workload but also easily leads to human error. Furthermore, existing technologies cannot automatically register gas meters to the application data platform after production, causing inconvenience for subsequent data management and analysis.

[0005] In view of this, the present invention proposes an automated testing and calibration system for gas meters. Utility Model Content

[0006] The purpose of this invention is to provide an automated testing and calibration system for gas meters, which avoids the cumbersome calibration and functional testing in different processes and simplifies the production process.

[0007] To achieve the above objectives, this utility model provides the following technical solution:

[0008] In a first aspect, this utility model provides an automated testing and calibration system for gas meters, including a test platform for placing the gas meter to be tested, and a test calibration area consisting of a limiting plate, a rear baffle, and an inner support platform on the test platform.

[0009] The test bench is equipped with a sealing component whose position can be adjusted relative to the test calibration area. The position of the sealing component is adjusted according to the gas inlet direction of the gas meter under test. The sealing component and the positioning strip are fixed together by positioning pins and positioning holes. The limiting plate adjusts the position of the gas meter in the test calibration area.

[0010] The sealing assembly includes a telescopic member and a small telescopic member. The small telescopic member is used to fix the gas meter to be tested, and the telescopic member can be sealed and connected to the gas inlet of the gas meter to be tested.

[0011] The test bench is equipped with a pushing component, which includes a pneumatic push rod guide rail and a pusher mounted thereon. The pusher can move the gas meter under test along the test bench to the next station.

[0012] The test bench is equipped with an operation panel for displaying relevant data and results of the testing and calibration process;

[0013] The test bench is communicatively connected to the application platform and is used to send the product control parameters of the gas meter under test to the application platform.

[0014] As a preferred technical solution of this utility model, an upper protective plate is provided directly above the inner support platform. The upper protective plate includes a fixed protective plate and a sliding protective plate. The sliding protective plate can slide left and right along the slide rail on the fixed protective plate.

[0015] As a preferred technical solution of this utility model, a rear baffle is provided on the rear side of the upper protective plate, a positioning strip is provided on the front of the upper protective plate, and side protective plates are installed on both sides of the positioning strip and the rear baffle. The positioning strip, the rear baffle and the side protective plates together form a protective area for the test and calibration area of ​​the gas meter to be tested.

[0016] As a preferred technical solution of this utility model, a safety light grid is provided on the test bench, and the object enters the test calibration area by emitting and receiving infrared rays or laser beams based on the safety light grid.

[0017] As a preferred technical solution of this utility model, the pressure rod on the sealing assembly fixes the gas meter to be tested. The gas inlet at the top of the gas meter to be tested is sealed and connected to the expansion joint through the sealing ring groove and the sealing connector. The sealing connector is fixed to the base of the expansion joint by the fixing bolt. The base of the expansion joint fixes the expansion joint to the adjustable support plate. One end of the adjustable support plate is fixedly connected to the positioning strip through the positioning block. The positioning block is provided with a positioning pin, which is fixed based on the positioning pin and the positioning hole on the positioning strip.

[0018] As a preferred technical solution of this utility model, a pressure gauge bracket is provided at the other end of the adjustable support plate, a pressure gauge is fixedly connected to the top of the pressure gauge bracket, and a pressure transmitter is fixedly installed on one side of the pressure gauge bracket.

[0019] As a preferred technical solution of this utility model, the pushing component includes a pneumatic push rod guide rail, a pusher is provided on the pneumatic push rod guide rail, the pusher can slide on the pneumatic push rod guide rail, and an adjusting foot is provided on the pusher to adjust the buffer distance with the gas meter body.

[0020] As a preferred embodiment of the present invention, a limiting plate is provided at the edge of the test platform near the pushing component, and a gasket is provided on the inner side of the limiting plate.

[0021] As a preferred technical solution of this utility model, the inner support and outer support provided on the test bench are metal supports, and an antistatic coating is placed on the inner support and the outer support.

[0022] Secondly, this utility model provides an automated testing and calibration method for gas meters, based on the implementation of the first aspect, comprising the following steps:

[0023] Step S1: Pre-enter product information, which includes the production work order number, employee number, and barcode on the gas meter base to be tested. The barcode is associated with the product model and product control parameters corresponding to the gas meter to be tested. The associated product information is stored in the storage module and displayed on the operation panel.

[0024] Step S2: Place the gas meter to be tested on the test platform, adjust the position of the sealing component according to the gas inlet direction of the gas meter to be tested, and fix it with the positioning pin and the positioning hole on the positioning strip. Place the gas meter to be tested face outward in the test calibration area composed of the limiting plate, the back baffle and the inner support platform. The limiting plate can adjust the position of the gas meter in the test calibration area.

[0025] Step S3: Click the Start button on the corresponding human-computer interaction interface on the operation panel to start the detection and calibration program;

[0026] Step S4: The monitoring center automatically starts the test, presses down the expansion joint and the small expansion joint in the sealing assembly. The small expansion joint is used to fix the gas meter under test. The expansion joint is connected to the gas inlet of the gas meter under test. Turn on all start switches to carry out the test and calibration work.

[0027] Step S5: After the test and calibration work is completed, the calibration data and relevant factory configuration parameters of the gas meter under test are written to the gas meter through the infrared port of the gas meter. The pusher moves the gas meter under test to the left side of the test bench. The test and calibration process data and results are displayed on the operation panel. The relevant product control parameters of the gas meter under test are sent to the corresponding application platform to complete the registration of the gas meter under test on the application platform.

[0028] Compared with the prior art, the beneficial effects of this utility model are:

[0029] This invention integrates calibration and functional testing into a single process flow, eliminating the need for a standard calibration stand and custom-developed functional testing fixtures. This avoids the cumbersome process of calibration and functional testing in different process flows, thereby simplifying the production process, improving production efficiency, and significantly reducing production costs. Attached Figure Description

[0030] Figure 1 This utility model relates to the structure of an automated testing and calibration device for gas meters. Figure 1 ;

[0031] Figure 2 This utility model relates to the structure of an automated testing and calibration device for gas meters. Figure 2 ;

[0032] Figure 3 This is a utility model Figure 2 Corresponding front view;

[0033] Figure 4 This is a utility model Figure 2 Enlarged structural diagram of section B;

[0034] Figure 5 This is a schematic diagram of the sealing assembly structure of this utility model;

[0035] Figure 6 This is a front view of the sealing assembly structure of this utility model;

[0036] Figure 7 This is a utility model Figure 6 Sectional view of the middle sealing assembly (AA);

[0037] Figure 8 This is a schematic diagram of the connection of the equipment on the outer side of the rear baffle of this utility model.

[0038] In the diagram: 1. Test bench; 101. Inner support platform; 102. Limiting plate; 103. Gasket; 104. Outer support platform; 2. Positioning strip; 3. Side protection plate; 4. Fixed protection plate; 401. Fixed protection plate; 402. Sliding protection plate; 5. Rear baffle; 501. Air source processor; 502. Flow meter; 503. Throttling element; 504. Shut-off valve; 505. Pressure regulating valve; 506. Precision pressure regulator; 507. Air pipe; 508. Ball valve; 6. Sealing assembly; 601. Pressure... 602. Rod; 603. Sealing ring groove; 604. Expansion joint base; 605. Adjustable support plate; 606. Positioning block; 607. Pressure gauge bracket; 608. Sealing connector; 609. Expansion joint; 610. Pressure gauge; 611. Miniature expansion joint; 612. Pressure transmitter; 613. Positioning pin; 614. Fixing bolt; 7. Pushing assembly; 701. Adjustable foot; 702. Pusher; 703. Pneumatic push rod guide rail; 8. Operation panel; 9. Safety light curtain; 10. Base. Detailed Implementation

[0039] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0040] In the description of this utility model, it should be noted that the terms "vertical", "up", "down", "horizontal", etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are only for the convenience of describing this utility model and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this utility model.

[0041] In the description of this utility model, it should also be noted that, unless otherwise explicitly specified and limited, the terms "set," "install," "connect," and "link" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; and they can refer to the internal connection of two components. Those skilled in the art can understand the specific meaning of the above terms in this utility model according to the specific circumstances.

[0042] Example 1

[0043] This utility model provides a technical solution: an automated testing and calibration method for gas meters, comprising the following steps:

[0044] Step S1: Pre-enter product information, which includes production work order number, employee number, and barcode on the base of the gas meter to be tested. The barcode is associated with the product model and product control parameters corresponding to the gas meter to be tested. The associated product information is stored in the storage module and displayed on the operation panel 8.

[0045] Specifically, the product information is obtained by scanning the production work order number, employee number, and barcode on the base of the gas meter to be tested using a barcode scanner; based on automatic computer identification and association, errors in manual input can be avoided.

[0046] Step S2: Place the gas meter to be tested on the test bench 1. Adjust the position of the sealing component 6 according to the gas inlet direction of the gas meter, and fix it using the positioning pin 612 and the positioning hole on the positioning strip 2. Place the gas meter to be tested face outward in the test calibration area composed of the limiting plate 102, the rear baffle 5, and the inner support 101. The limiting plate 102 can adjust the position of the gas meter in the test calibration area.

[0047] Specifically, the test bench 1 includes an inner support 101 for testing the gas meter to be tested. A fixed protection plate 401 and a sliding protection plate 402 are provided directly above the inner support 101. The sliding protection plate 402 can slide left and right along the slide rail on the fixed protection plate 401. When the sealing component 6 is adjusted to the left side due to the gas meter's gas inlet direction, the sliding protection plate 402 can be moved to directly above the left fixed protection plate 401. The sliding protection plate 402 and the fixed protection plate 401 cooperate to form the upper protection plate 4.

[0048] A rear baffle 5 is provided on the rear side of the upper protective plate 4, and a positioning strip 2 is provided on the front of the upper protective plate 4. Side protective plates 3 are installed on both sides of the positioning strip 2 and the rear baffle 5. The positioning strip 2, the rear baffle 5 and the side protective plates 3 enclose and form a protective area for the test calibration area of ​​the gas meter to be tested.

[0049] A safety light curtain 9 is installed at the connection between the inner support platform 101 and the outer support platform 104 of the test bench 1. The safety light curtain 9 detects objects entering the test calibration area by emitting and receiving infrared or laser beams. The safety light curtain 9 also has an emergency stop function to ensure that if a gas meter other than the one being tested enters the test calibration area during the test, the operation will stop immediately, thereby avoiding possible damage to personnel or equipment, protecting operators from injury, and improving the safety of the entire production line by reducing accidents caused by improper operation or accidental entry.

[0050] Step S3: Click the start button on the corresponding human-machine interface on the operation panel 8 to start the detection and calibration program;

[0051] Before starting the testing and calibration, the gas meter to be tested needs to be fixed on the test bench 1. The pressure rod 601 on the sealing assembly 6 fixes the gas meter to be tested. The top air inlet of the gas meter to be tested is sealed and connected to the expansion joint 608 through the sealing ring groove 602 and the sealing connector 607. The sealing connector 607 is fixed to the expansion joint base 603 by the fixing bolt 613. The expansion joint base 603 fixes the expansion joint 608 to the adjustable support plate 604. One end of the adjustable support plate 604 is fixedly connected to the positioning strip 2 through the positioning block 605. The positioning block 605 is provided with a positioning pin 612, which is fixed based on the positioning pin 612 and the positioning hole on the positioning strip 2.

[0052] Step S4: The monitoring center automatically starts the test, presses down the expansion joint 608 and the small expansion joint 610 in the sealing assembly 6. The small expansion joint 610 is used to fix the gas meter to be tested. The expansion joint 608 is connected to the gas inlet of the gas meter to be tested. Turn on all the start switches to carry out the test and calibration work.

[0053] Specifically, a pressure gauge bracket 606 is provided at the other end of the adjustable support plate 604. A pressure gauge 609 is fixedly connected to the top of the pressure gauge bracket 606, and a pressure transmitter 611 is fixedly installed on one side of the pressure gauge bracket 606. The pressure transmitter 611 converts the pressure signal in the pressure gauge 609 into an electrical signal and sends the electrical signal to the monitoring center.

[0054] The calibration and testing of the gas meter under test is based on the sealing assembly 6 and the high-precision standard flow meter in the pipeline, specifically including:

[0055] The gas meter under test is equipped with a photoelectric communication interface. The flow rate value in the gas meter is read through this interface and compared with the flow rate value of a high-precision standard flow meter in the pipeline. A calibration coefficient is calculated and written into the gas meter via the photoelectric communication interface. Based on the temperature in the high-precision standard flow meter and the pressure in pressure gauge 609, and combined with the photoelectric interface, the valves and communication functions of the gas meter under test are controlled to detect valve leaks and other issues.

[0056] Step S5: After the test and calibration work is completed, the calibration data and relevant factory configuration parameters of the gas meter under test are written to the gas meter through the infrared port of the gas meter. The pusher 702 moves the gas meter under test to the left side of the test bench 1. The test and calibration process data and results are displayed on the operation panel 8. The relevant product control parameters of the gas meter under test are sent to the corresponding application platform to complete the registration of the gas meter under test on the application platform.

[0057] It should be noted that in the functional test items, operators do not need to fill in the test parameters. The test parameters are automatically generated by directly associating the product model in the backend. This can reduce the workload of operators, avoid human error, and improve the accuracy and efficiency of testing. After the test is completed, it is automatically registered to the application data platform, which facilitates subsequent data management and analysis and realizes the automated management of gas meters.

[0058] Specifically, a pushing component 7 is provided directly below the sealing component 6. The pushing component 7 includes a pneumatic push rod guide rail 703, on which a pusher 702 is provided. The pusher 702 can slide on the pneumatic push rod guide rail 703. An adjusting foot 701 is provided on the pusher 702. The adjusting foot 701 is in direct contact with the gas meter to be tested. After the gas meter is tested, the system executes the action of the pusher 702 moving to the left along the pneumatic push rod guide rail 703. The adjusting foot 701 directly acts on the gas meter, thereby adjusting the buffer distance between the gas meter and the gas meter body.

[0059] A limiting plate 102 is provided at the edge of the test bench 1 near the pushing component 7. A gasket 103 is provided on the inner side of the limiting plate 102, and the gasket 103 contacts the gas meter to be tested. A pusher 702 is provided above the limiting plate 102. The pusher 702 acts on the gas meter to be tested, which is limited by the limiting plate 102, through the adjusting foot 701. When the pusher 702 is activated, the pusher 702 directly pushes the gas meter to be tested through the adjusting foot 701, and pushes it to the test calibration area under the action of the pneumatic push rod guide rail 703. The limiting plate 102 contacts the gas meter to be tested through the gasket 103 but does not directly contact it, thus serving the function of the gas meter to be tested.

[0060] Example 2

[0061] like Figure 1-8 As shown in Embodiment 1, the part of this utility model not described in detail provides a specific testing and calibration method. This method simultaneously achieves calibration and testing functions by providing a fixed set of equipment. In practical applications, it is not limited to the specific testing and calibration method in Embodiment 1; it also requires the realization of automated management of gas meters. Even simple mechanical automatic testing or methods combined with manual data collection are equally applicable. This embodiment provides an automated gas meter testing and calibration system, which, through the cooperation of simple components, is suitable for calibrating gas meters. It includes a test platform 1 for placing the gas meter to be tested, and a test calibration area composed of a limiting plate 102, a rear baffle 5, and an inner support 101 on the test platform 1. The gas meter to be tested is fixed and subsequently linked within the test calibration area.

[0062] Adjust the position of the sealing component 6 according to the gas inlet direction of the gas meter under test, and fix it by cooperating with the positioning pin 612 and the positioning hole on the positioning strip 2. Adjust the position of the gas meter in the test calibration area based on the limit plate 102.

[0063] Specifically, the test bench 1 includes an inner support 101 for testing the gas meter to be tested. A fixed protection plate 401 and a sliding protection plate 402 are provided directly above the inner support 101. The sliding protection plate 402 can slide left and right along the slide rail on the fixed protection plate 401. When the sealing component 6 is adjusted to the left side due to the gas meter's gas inlet direction, the sliding protection plate 402 can be moved to directly above the left fixed protection plate 401. The sliding protection plate 402 and the fixed protection plate 401 cooperate to form the upper protection plate 4.

[0064] A rear baffle 5 is provided on the rear side of the upper protective plate 4, and a positioning strip 2 is provided on the front of the upper protective plate 4. Side protective plates 3 are installed on both sides of the positioning strip 2 and the rear baffle 5. The positioning strip 2, the rear baffle 5 and the side protective plates 3 enclose and form a protective area for the test calibration area of ​​the gas meter under test. The protective area is used to provide basic protection for the gas meter under test during the calibration and testing process through basic components.

[0065] A safety light curtain 9 is installed at the connection between the inner support platform 101 and the outer support platform 104 of the test bench 1. The safety light curtain 9 detects objects entering the test calibration area by emitting and receiving infrared or laser beams. The safety light curtain 9 also has an emergency stop function to ensure that if a gas meter other than the one being tested enters the test calibration area during the test, the operation will stop immediately, thereby avoiding possible damage to personnel or equipment, protecting operators from injury, and improving the safety of the entire production line by reducing accidents caused by improper operation or accidental entry.

[0066] The rear of the back panel 5 is equipped with a gas source processor 501, a flow meter 502, a throttling element 503, a shut-off valve 504, a pressure regulating valve 505, a precision pressure regulator 506, a gas pipe 507, and a ball valve 508, all controlled by a calibration control terminal. The calibration control terminal controls and monitors the entire calibration process, including starting and stopping the flow meter, adjusting the throttling element and pressure regulating valve, etc., to calibrate the gas meter. Specifically, the gas source processor 501 processes the gas supplied to the gas meter, ensuring that the purity and quality of the gas meet calibration requirements. The flow meter 502 measures the gas flow rate through the gas meter, providing an accurate reading of the actual flow rate. The throttling element 503 controls and adjusts the gas flow rate through the gas meter for calibration at different flow rates. The shut-off valve 504 cuts off the gas supply for maintenance or adjustment when the gas meter is not in use. The pressure regulating valve 505 adjusts the pressure supplied to the gas meter to ensure the accuracy of the gas meter under different operating pressures. The precision pressure regulator 506 maintains a stable gas pressure, while the gas line 507 connects all components to ensure smooth gas flow. The ball valve 508 fine-tunes the gas flow rate, providing more precise control.

[0067] During calibration, record the gas meter readings and flow meter measurements. Use this data to calculate the gas meter's error rate and adjust as needed. If the error between the gas meter reading and the flow meter measurement exceeds the factory specifications, the gas meter's parameters need to be adjusted. Then repeat the calibration process until the gas meter reading matches the actual flow rate; once the gas meter calibration is complete and meets all accuracy requirements, ensure the gas meter's accuracy and reliability in actual use.

[0068] The pressure rod 601 on the sealing assembly 6 fixes the gas meter to be tested. The gas inlet at the top of the gas meter to be tested is sealed and connected to the expansion joint 608 through the sealing ring groove 602 and the sealing connector 607. The sealing connector 607 is fixed to the expansion joint base 603 by the fixing bolt 613. The expansion joint base 603 fixes the expansion joint 608 to the adjustable support plate 604. One end of the adjustable support plate 604 is fixedly connected to the positioning strip 2 through the positioning block 605. The positioning block 605 is provided with a positioning pin 612, which is fixed based on the positioning pin 612 and the positioning hole on the positioning strip 2.

[0069] The monitoring center automatically starts the test, presses down the expansion joint 608 and the small expansion joint 610 in the sealing assembly 6. The small expansion joint 610 is used to fix the gas meter under test. The expansion joint 608 is connected to the gas inlet of the gas meter under test. All start switches are turned on to carry out the test and calibration work.

[0070] The other end of the adjustable support plate 604 is provided with a pressure gauge bracket 606. A pressure gauge 609 is fixedly connected to the top of the pressure gauge bracket 606, and a pressure transmitter 611 is fixedly installed on one side of the pressure gauge bracket 606. The pressure transmitter 611 converts the pressure signal in the pressure gauge 609 into an electrical signal and sends the electrical signal to the monitoring center.

[0071] The calibration and testing of the gas meter under test is based on the sealing assembly 6 and the high-precision standard flow meter in the pipeline, specifically including:

[0072] The gas meter under test is equipped with a photoelectric communication interface. The flow rate value in the gas meter is read through this interface and compared with the flow rate value of a high-precision standard flow meter in the pipeline. A calibration coefficient is calculated and written into the gas meter via the photoelectric communication interface. Based on the temperature in the high-precision standard flow meter and the pressure in pressure gauge 609, and combined with the photoelectric interface, the valves and communication functions of the gas meter under test are controlled to detect valve leaks and other issues.

[0073] After the testing and calibration are completed, the calibration data and relevant factory configuration parameters of the gas meter under test are written to the gas meter through the gas meter's infrared port. The pusher 702 moves the gas meter under test to the left side of the test bench 1. The operation panel 8 displays the test and calibration process data and results. The relevant product control parameters of the gas meter under test are sent to the corresponding application platform to complete the registration of the gas meter under test on the application platform. A pusher 7 is provided below the sealing component 6. The pusher 7 includes a pneumatic push rod guide rail 703. A pusher 702 is provided on the pneumatic push rod guide rail 703. The pusher 702 can slide on the pneumatic push rod guide rail 703. An adjustment foot 701 is provided on the pusher 702. The adjustment foot 701 is in direct contact with the gas meter under test. After the gas meter is tested, the system executes the action of the pusher 702 moving to the left along the pneumatic push rod guide rail 703. The adjustment foot 701 directly acts on the gas meter to adjust the buffer distance with the gas meter body.

[0074] A limiting plate 102 is provided at the edge of the test bench 1 near the pushing component 7. A gasket 103 is provided on the inner side of the limiting plate 102, and the gasket 103 contacts the gas meter to be tested. A pusher 702 is provided above the limiting plate 102. The pusher 702 acts on the gas meter to be tested, which is limited by the limiting plate 102, through the adjusting foot 701. When the pusher 702 is activated, the pusher 702 directly pushes the gas meter to be tested through the adjusting foot 701, and pushes it to the test calibration area under the action of the pneumatic push rod guide rail 703. The limiting plate 102 contacts the gas meter to be tested through the gasket 103 but does not directly contact it, thus serving the function of the gas meter to be tested.

[0075] Example 3

[0076] The parts of this utility model not described in detail are shown in Embodiment 2. This embodiment uses the automated gas meter testing and calibration system provided in Embodiment 2. The inner support platform 101 and the outer support platform 104 on the test bench 1 are metal platforms, and an anti-static coating is placed on the inner support platform 101 and the outer support platform 104. The metal platforms support and fix the gas meter components to provide a solid and stable support, while the application of the anti-static coating helps to prevent potential damage to the gas meter by static electricity. When sensitive electronic components are involved in the calibration process, it prevents electrostatic discharge from damaging the electronic components of the gas meter. The coating usually contains conductive materials, such as carbon powder or metal powder, which can improve the surface conductivity, thereby quickly dissipating static electricity.

[0077] Although embodiments of the present invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of the present invention, the scope of which is defined by the appended claims and their equivalents.

Claims

1. An automated testing and calibration system for gas meters, characterized in that: The test bench (1) is used to place the gas meter to be tested. A test calibration area consisting of a limiting plate (102), a rear baffle (5) and an inner support (101) is provided on the test bench (1). The test bench (1) is provided with a sealing component (6) whose position can be adjusted relative to the test calibration area. The position of the sealing component (6) is adjusted according to the gas inlet direction of the gas meter to be tested. The sealing component (6) and the positioning strip (2) are fixed together by the positioning pin (612) and the positioning hole. The limiting plate (102) adjusts the position of the gas meter in the test calibration area. The sealing assembly (6) includes a telescopic member (608) and a small telescopic member (610). The small telescopic member (610) is used to fix the gas meter to be tested, and the telescopic member (608) can be sealed and connected to the gas inlet of the gas meter to be tested. The test bench (1) is provided with a pushing component (7), which includes a pneumatic push rod guide rail (703) and a pusher (702) mounted thereon. The pusher (702) can move the gas meter to be tested along the test bench (1) to the next station. The test bench (1) is equipped with an operation panel (8) for displaying relevant data and results of the test and calibration process; The test bench (1) is connected to the application platform for communication and is used to send the product control parameters of the gas meter under test to the application platform.

2. The automated testing and calibration system for gas meters according to claim 1, characterized in that: An upper protective plate (4) is provided directly above the inner support platform (101). The upper protective plate (4) includes a fixed protective plate (401) and a sliding protective plate (402). The sliding protective plate (402) can slide left and right along the slide rail on the fixed protective plate (401).

3. The automated testing and calibration system for gas meters according to claim 2, characterized in that: A rear baffle (5) is provided on the rear side of the upper protective plate (4), and a positioning strip (2) is provided on the front of the upper protective plate (4). Side protective plates (3) are installed on both sides of the positioning strip (2) and the rear baffle (5). The positioning strip (2), the rear baffle (5) and the side protective plates (3) form a protective area for the test calibration area of ​​the gas meter to be tested.

4. The automated testing and calibration system for gas meters according to claim 1, characterized in that: A safety light curtain (9) is provided on the test bench (1). The safety light curtain (9) is used to detect objects entering the test calibration area by emitting and receiving infrared or laser beams.

5. The automated testing and calibration system for a gas meter according to claim 4, characterized in that: The pressure rod (601) on the sealing assembly (6) fixes the gas meter to be tested. The gas inlet at the top of the gas meter to be tested is sealed and connected to the expansion joint (608) through the sealing ring groove (602) and the sealing connector (607). The sealing connector (607) is fixed to the expansion joint base (603) by the fixing bolt (613). The expansion joint base (603) fixes the expansion joint (608) to the adjustable support plate (604). One end of the adjustable support plate (604) is fixedly connected to the positioning strip (2) through the positioning block (605). The positioning block (605) is provided with a positioning pin (612), which is fixed based on the positioning pin (612) and the positioning hole on the positioning strip (2).

6. The automated testing and calibration system for a gas meter according to claim 5, characterized in that: The other end of the adjustable support plate (604) is provided with a pressure gauge bracket (606), a pressure gauge (609) is fixedly connected to the top of the pressure gauge bracket (606), and a pressure transmitter (611) is fixedly installed on one side of the pressure gauge bracket (606).

7. The automated testing and calibration system for a gas meter according to claim 1, characterized in that: The push assembly (7) includes a pneumatic push rod guide rail (703), on which a pusher (702) is provided. The pusher (702) can slide on the pneumatic push rod guide rail (703). An adjusting foot (701) is provided on the pusher (702) to adjust the buffer distance with the gas meter body.

8. The automated testing and calibration system for a gas meter according to claim 7, characterized in that: A limiting plate (102) is provided at the edge of the test bench (1) near the pushing component (7), and a gasket (103) is provided on the inner side of the limiting plate (102).

9. The automated testing and calibration system for a gas meter according to claim 1, characterized in that: The inner support platform (101) and the outer support platform (104) set on the test bench (1) are metal support platforms, and an antistatic coating is placed on the inner support platform (101) and the outer support platform (104).

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