Measuring instrument test bench

Abstract

The present application relates to a meter test bench, which belongs to the technical field of test benches. The meter test bench includes a frame, an oil storage tank, an oil pumping mechanism, a flow regulating component, a clamping joint, a fixed joint, a mobile driving mechanism, a standard meter, a data acquisition system, an oil control component, and a controller. The mobile driving mechanism is used to drive the clamping joint to move closer to or away from the fixed joint relative to the frame to clamp or loosen the meter to be measured. The data acquisition system is used to collect data signals of the standard meter and the meter to be measured. The flow regulating component is used to control the flow of oil. One end of the oil control component is used to connect to a high-pressure gas source, and the other end of the oil control component is connected to the fixed joint. The oil control component is used to discharge the oil of the meter to be measured to the oil storage tank. The meter test bench improves the automation level of meter detection, improves detection efficiency, and reduces labor costs.

Description

Technical Field

[0001] The present application relates to the technical field of testing platforms, and in particular to a measuring instrument testing platform. Background Art

[0002] A fuel dispenser is a liquid metering device that fills vehicles with fuel at a gas station. Its working principle is as follows: the motor of the fuel dispenser drives the pump to rotate, sucking the fuel from the oil tank of the gas station, and then pressurizing it and delivering it to the vehicle's fuel tank through the meter, solenoid valve, hose, and fuel gun. The meter (also called a flow meter) is the core component of the fuel dispenser's metering accuracy and requires multiple steps of inspection during the production process.

[0003] Usually, the meter detection requires the following steps: install the meter to be tested → aging (measure a certain volume through oil) → test the relative error value of the metering accuracy of 100 liters of the meter to be tested and the standard meter (test 100 liters relative error test) → adjust the handle (adjust the actual displacement of the meter to be tested) → the second 100 liter relative error test. If it does not meet the requirements, continue to adjust the handle; if it is qualified, go to the next step → the relative error value of the metering accuracy of the meter to be tested at large, medium and small flow points and the standard meter → air tightness check → tie lead seal → control oil → remove the meter to be tested → fill in the record sheet. Conventional test benches control the above operation steps step by step, and each action needs to be operated once. Therefore, the operator can only observe the progress of the test. A single person can only operate one station, the detection efficiency is very low, and the labor cost is high. Summary of the invention

[0004] The purpose of the present application is to provide a meter testing platform, which improves the automation level of meter testing, improves testing efficiency, and reduces labor costs.

[0005] This application is achieved through the following technical solutions:

[0006] The present application provides a meter test bench, including a frame, an oil storage tank, an oil pump mechanism, a flow regulating component, a compression joint, a fixed joint, a mobile drive mechanism, a standard meter, a data acquisition system, an oil control component, and a controller;

[0007] The oil storage tank is arranged on the frame, the oil pumping mechanism is arranged on the frame, the clamping joint is slidably matched with the frame, the fixed joint is arranged on the frame, the oil inlet of the oil pumping mechanism is connected to the oil storage tank, the oil inlet end of the clamping joint is respectively connected to the oil outlet of the oil pumping mechanism and the oil storage tank, the oil inlet end of the fixed joint and the oil outlet end of the clamping joint define a detection station, the detection station is used to accommodate the measured meter, the mobile driving mechanism is used to drive the clamping joint to approach or move away from the fixed joint relative to the frame to clamp or release the measured meter, the oil outlet end of the fixed joint is connected to the oil inlet end of the standard meter, the oil outlet end of the standard meter is connected to the oil inlet end of the flow regulating component, and the oil outlet end of the flow regulating component is connected to the oil storage tank;

[0008] The data acquisition system is used to collect data signals of the standard meter and the meter to be measured. The flow regulating component is used to control the flow of the oil. One end of the oil control component is used to connect to the high-pressure gas source, and the other end of the oil control component is connected to the fixed joint. The oil control component is used to discharge the oil of the meter to be measured into the oil storage tank.

[0009] The controller is electrically connected to the oil pump mechanism, the data acquisition system, the flow regulating component, and the oil control component respectively, and the controller is used for communication connection with the background management system.

[0010] According to the meter test bench of the embodiment of the present application, an oil circulation path is formed by an oil storage tank, an oil pump mechanism, a meter to be tested, a standard meter, a flow regulating component and an oil storage tank to detect the aging of the meter to be tested; the metering accuracy of the meter to be tested is calibrated at different flow rates through the flow regulating component; the aging detection process is recorded through a data acquisition system, and the aging data can be exported at any time, replacing the manual filling of paper record sheets, which is convenient for data storage and quick query. The meter test bench improves the automation level of meter detection, saves labor costs, and improves detection efficiency.

[0011] According to some embodiments of the present application, the meter testing bench also includes a connector, which is a tee, and has a first connection port, a second connection port and a third connection port. The oil inlet end of the compression joint is connected to an oil inlet hose, the first connection port is connected to the oil outlet of the oil pumping mechanism, the second connection port is connected to the oil inlet hose, and the third connection port is connected to the oil storage tank through an oil control hose, and the oil control hose is provided with a bypass solenoid valve.

[0012] In the above scheme, the three-way structure of the connector facilitates the connection between the compression joint, the oil pumping mechanism and the oil storage tank, and the structure is compact, reducing space occupation.

[0013] According to some embodiments of the present application, the oil control assembly includes an oil control solenoid valve and an oil control pipe, one end of the oil control pipe is used to connect to a high-pressure gas source, the other end of the oil control pipe is connected to a fixed joint, the oil control solenoid valve is arranged on the oil control pipe, and the oil control solenoid valve is electrically connected to a controller.

[0014] In the above scheme, the high-pressure gas source and the fixed joint are connected through the oil control pipe, so that when the oil control solenoid valve is opened, the high-pressure gas source can transmit power to the measured meter to discharge the oil in the measured meter.

[0015] According to some embodiments of the present application, the meter detection station further includes an alarm component, and the alarm component is electrically connected to the controller.

[0016] In the above scheme, the setting of the alarm component facilitates the alarm when abnormal phenomena occur during the detection process, so that the staff can respond quickly.

[0017] According to some embodiments of the present application, the flow regulating component includes a diverter, a first branch, a second branch, a third branch, a first branch control valve, a first branch flow valve, a second branch control valve, a second branch flow valve, a third branch control valve, a third branch flow valve, and a confluence device. The oil inlet end of the diverter is connected to the oil outlet end of the standard meter. The oil outlet end of the diverter is connected to the oil inlet end of the confluence device through the first branch, the second branch, and the third branch, respectively. The oil outlet end of the confluence device is connected to the oil storage tank through an oil return hose. The first branch The control valve and the first branch flow valve are arranged in series on the first branch, the second branch control valve and the second branch flow valve are arranged in series on the second branch, the third branch control valve and the third branch flow valve are arranged in series on the third branch, the first branch control valve, the second branch control valve and the third branch control valve are interlocked, each branch control valve is used to control the on and off of the corresponding branch, each branch flow valve is used to adjust the flow of the corresponding branch, and the first branch control valve, the second branch control valve and the third branch control valve are all electrically connected to the controller.

[0018] In the above scheme, the flow of the corresponding branch is adjusted by the branch flow valve, and the on-off of the corresponding branch is controlled by the branch control valve, so as to facilitate the metering accuracy test of different flow rates.

[0019] According to some embodiments of the present application, the oil pumping mechanism includes an oil pumping motor and an oil pump. The oil pumping motor is electrically connected to the controller. The oil pumping motor is used to drive the oil pump to work. The oil inlet of the oil pump is connected to the oil storage tank through an oil inlet pipe, and the oil outlet of the oil pump is connected to the oil inlet end of the compression joint.

[0020] In the above scheme, the oil in the oil storage tank is transported to the compression joint by an oil pump to meet the oil transportation demand.

[0021] According to some embodiments of the present application, the frame includes a first mounting layer and a second mounting layer which are stacked, the oil storage tank is located below the first mounting layer, the second mounting layer is located above the first mounting layer, the oil pumping mechanism and the flow regulating assembly are located on the first mounting layer, and the standard meter and the inspection station are located on the second mounting layer.

[0022] In the above scheme, by setting the first installation layer and the second installation layer, the installation space is reasonably utilized, so that the structure of each component is compact.

[0023] According to some embodiments of the present application, the meter testing station further includes a display, which is electrically connected to the controller.

[0024] In the above scheme, the setting of the display makes it easy for the staff to observe and grasp the progress of the inspection.

[0025] According to some embodiments of the present application, the meter testing station also includes an electrical control cabinet, and the data acquisition system and the controller are both arranged in the electrical control cabinet.

[0026] In the above scheme, the electrical components such as the controller and the data acquisition system are stored and protected by the electrical control cabinet.

[0027] According to some embodiments of the present application, the mobile driving mechanism includes a driving handle, a screw rod, and a threaded sleeve. The threaded sleeve is installed on a frame. One end of the screw rod is connected to the driving handle, and the other end of the screw rod passes through the threaded sleeve and is connected to the clamping joint. The screw rod and the threaded sleeve are threadedly matched.

[0028] In the above scheme, the linear movement of the compression joint relative to the frame is achieved through the cooperation between the screw rod and the threaded sleeve, and the movement adjustment accuracy is high.

[0029] Additional aspects and advantages of the present application will be given in part in the description below, and in part will become apparent from the description below, or will be learned through the practice of the present application. BRIEF DESCRIPTION OF THE DRAWINGS

[0030] In order to more clearly illustrate the technical solutions of the embodiments of the present application, the drawings required for use in the embodiments will be briefly introduced below. It should be understood that the following drawings only show certain embodiments of the present application and therefore should not be regarded as limiting the scope. For ordinary technicians in this field, other related drawings can be obtained based on these drawings without paying creative work.

[0031] Figure 1 A schematic diagram of the structure of a meter testing station provided in one embodiment of the present application;

[0032] Figure 2 A schematic diagram of a frame of a meter testing station provided in one embodiment of the present application;

[0033] Figure 3 for Figure 1 Enlarged view of point A.

[0034] Icons: 100-meter test bench; 10-frame; 101-support frame; 102-bottom plate; 103-top plate; 104-first mounting plate; 105-second mounting plate; 106-first mounting layer; 107-second mounting layer; 108-shielding plate; 11-oil storage tank; 12-compression joint; 13-fixed joint; 14-connector; 15-guide seat; 16-fixed seat; 20-oil pump mechanism; 21-oil pump motor; 22-oil pump; 30-flow regulating assembly; 31-diverter; 321-first branch control valve; 322-first branch flow valve; 331-second branch Control valve; 332-second branch flow valve; 341-third branch control valve; 342-third branch flow valve; 35-concentrator; 40-mobile drive mechanism; 41-drive handle; 42-screw; 43-threaded sleeve; 50-oil control assembly; 51-oil control solenoid valve; 52-oil control pipe; 61-standard meter; 62-measured meter; 71-oil inlet pipe; 72-oil inlet hose; 73-oil outlet hose; 74-oil return hose; 75-oil control hose; 76-bypass solenoid valve; 80-electric control cabinet; 81-controller; 82-data acquisition system; 83-display; 84-alarm assembly. DETAILED DESCRIPTION

[0035] In order to make the purpose, technical solution and advantages of the embodiments of the present application clearer, the technical solution in the embodiments of the present application will be clearly and completely described below in conjunction with the drawings in the embodiments of the present application. Obviously, the described embodiments are part of the embodiments of the present application, rather than all the embodiments. The components of the embodiments of the present application described and shown in the drawings here can be arranged and designed in various different configurations.

[0036] Therefore, the following detailed description of the embodiments of the present application provided in the accompanying drawings is not intended to limit the scope of the present application for which protection is sought, but merely represents selected embodiments of the present application. Based on the embodiments in the present application, all other embodiments obtained by ordinary technicians in the field without creative work are within the scope of protection of the present application.

[0037] It should be noted that similar reference numerals and letters denote similar items in the following drawings, and therefore, once an item is defined in one drawing, further definition and explanation thereof is not required in subsequent drawings.

[0038] In the description of this application, it should be noted that the terms "inside", "outside", etc. indicate the orientation or positional relationship based on the orientation or positional relationship shown in the drawings, or the orientation or positional relationship in which the product of the application is usually placed when in use, which is only for the convenience of describing this application and simplifying the description, and does not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation on this application. In addition, the terms "first", "second", etc. are only used to distinguish the description, and cannot be understood as indicating or implying relative importance.

[0039] In the description of this application, it should also be noted that, unless otherwise clearly specified and limited, the terms "disposed" and "connected" should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a direct connection, or an indirect connection through an intermediate medium, or it can be the internal communication of two elements. For ordinary technicians in this field, the specific meanings of the above terms in this application can be understood according to specific circumstances.

[0040] The following describes a meter testing station according to an embodiment of one aspect of the present application with reference to the drawings.

[0041] like Figure 1-Figure 3 As shown, the meter testing station 100 according to the embodiment of the present application includes: a frame 10, an oil storage tank 11, an oil pumping mechanism 20, a flow regulating component 30, a clamping joint 12, a fixed joint 13, a mobile drive mechanism 40, a standard meter 61, a data acquisition system 82 (not shown in the figure), an oil control component 50, and a controller 81.

[0042] Specifically, the frame 10 is used to be installed on a workbench (such as the floor of a workshop, a foundation, or other supporting platforms, etc.), and the frame 10 plays a role of positioning support. The oil storage tank 11 is arranged on the frame 10, and the oil storage tank 11 is used to contain oil to provide oil for the detection of the measured meter 62. The oil pumping mechanism 20 is arranged on the frame 10, and the oil inlet of the oil pumping mechanism 20 is connected to the oil storage tank 11. The fixed joint 13 is arranged on the frame 10, and the clamping joint 12 is slidably matched with the frame 10. The oil outlet end of the clamping joint 12 and the oil inlet end of the fixed joint 13 define a detection station, and the detection station is used to accommodate the measured meter 62. When the clamping joint 12 and the fixed joint 13 confine the measured meter 62 to the detection station, the clamping joint 12, the measured meter 62 and the fixed joint 13 are connected. The oil inlet end of the clamping joint 12 is connected to the oil outlet of the oil pumping mechanism 20 and the oil storage tank 11 respectively, and the oil pumping mechanism 20 can transport the oil in the oil storage tank 11 to the measured meter 62 located at the detection station via the clamping joint 12. The mobile drive mechanism 40 is used to drive the clamping joint 12 to approach or move away from the fixed joint 13 relative to the frame 10 to clamp or loosen the measured meter 62. The oil outlet end of the fixed joint 13 is connected to the oil inlet end of the standard meter 61, and the oil outlet end of the standard meter 61 is connected to the oil inlet end of the flow regulating component 30, and the oil outlet end of the flow regulating component 30 is connected to the oil storage tank 11. The controller 81 is electrically connected to the oil pumping mechanism 20, the data acquisition system 82, the flow regulating component 30, and the oil control component 50 respectively, and the controller 81 is used to communicate with the background management system. The data acquisition system 82 is used to collect data signals of the standard meter 61 and the measured meter 62, so that the controller 81 transmits the data signals to the background management system for data storage. The flow regulating assembly 30 is used to control the flow of the oil so as to detect the metering accuracy of different flow rates. One end of the oil control assembly 50 is used to connect to the high-pressure gas source, and the other end of the oil control assembly 50 is connected to the fixed joint 13. The oil control assembly 50 is used to introduce the high-pressure gas into the fixed joint 13 and enter the measured meter 62 through the fixed joint 13, so as to discharge the oil in the measured meter 62 into the oil storage tank 11.

[0043] According to the meter test bench 100 of the embodiment of the present application, an oil circulation path is formed by the oil storage tank 11, the oil pump mechanism 20, the meter 62 to be tested, the standard meter 61, the flow regulating component 30 and the oil storage tank 11 to detect the aging of the meter 62 to be tested; the metering accuracy of the meter 62 to be tested is calibrated at different flow rates through the flow regulating component 30; the aging detection process is recorded through the data acquisition system 82, and the aging data can be exported at any time, replacing the manual filling of paper record sheets, which is convenient for data storage and quick query. The meter test bench 100 improves the automation level of meter detection, saves labor costs, and improves detection efficiency.

[0044] It should be pointed out that in order to facilitate the discharge of the oil in the measured meter 62, high-pressure gas is used to drive the oil away from the measured meter 62, and the high-pressure gas source is used to provide high-pressure gas; the high-pressure gas here refers to gas with a gas pressure of 4barg to 12.5barg.

[0045] According to some embodiments of the present application, Figure 1 As shown, the frame 10 includes a first mounting layer 106 and a second mounting layer 107 which are stacked, the oil storage tank 11 is located below the first mounting layer 106, the second mounting layer 107 is located above the first mounting layer 106, the oil pump mechanism 20 and the flow regulating assembly 30 are located on the first mounting layer 106, and the standard meter 61 and the detection station are located on the second mounting layer 107. By setting the first mounting layer 106 and the second mounting layer 107, the installation space is reasonably utilized, and the structure of each component is compact. As shown in the figure, the frame 10 includes a supporting frame body 101, a bottom plate 102, a top plate 103, a first mounting plate 104, and a second mounting plate 105. The bottom plate 102, the first mounting plate 104, the second mounting plate 105 and the top plate 103 are stacked on the supporting frame body 101, the second mounting plate 105 is located above the first mounting plate 104, an accommodating cavity is formed between the first mounting plate 104 and the bottom plate 102, the oil storage tank 11 is arranged in the accommodating cavity, a first mounting layer 106 is defined between the first mounting plate 104 and the second mounting plate 105, and a second mounting layer 107 is defined between the second mounting plate 105 and the top plate 103.

[0046] According to some embodiments of the present application, Figure 2 As shown, the rack 10 further includes a shielding plate 108 , which is installed on the support frame 101 to shield components disposed in the support frame 101 , which can be understood as shielding components located on the first installation layer 106 and the second installation layer 107 .

[0047] According to some embodiments of the present application, Figure 1 As shown, the meter test station 100 also includes an electric control cabinet 80, in which the data acquisition system 82 and the controller 81 are both arranged, and the electric control cabinet 80 is located outside the top plate 103. The electric control cabinet 80 is used to store and protect electrical components such as the controller 81 and the data acquisition system 82.

[0048] According to some embodiments of the present application, Figure 1As shown, the meter test station 100 also includes a display 83, which is arranged in the electric control cabinet 80, and the display 83 is electrically connected to the controller 81. The controller 81 is used to process the data signal collected by the data acquisition system 82 and display it on the display 83. The setting of the display 83 is convenient for the staff to observe and grasp the progress of the test, and to compare the metering data of the standard meter 61 and the measured meter 62. As an optional method of the present application, the display 83 is a touch screen display to facilitate the operation of the staff. The display 83 can display the control interface, such as the function keys such as the start button and the stop button, the volume display data of the measured meter 62 and the standard meter 61, etc.

[0049] According to some embodiments of the present application, Figure 1 As shown, the oil pumping mechanism 20 includes an oil pumping motor 21 and an oil pump 22. The oil pumping motor 21 is electrically connected to the controller 81. The oil pumping motor 21 is used to drive the oil pump 22 to work. The oil inlet of the oil pump 22 is connected to the oil storage tank 11 through the oil inlet pipe 71, and the oil outlet of the oil pump 22 is connected to the oil inlet end of the compression joint 12. The oil in the oil storage tank 11 is transported to the compression joint 12 through the oil pump 22 to meet the oil transportation demand.

[0050] According to some embodiments of the present application, Figure 1 As shown, the meter test bench 100 also includes a connector 14, which is a three-way connector, and has a first connection port, a second connection port, and a third connection port. The oil inlet end of the compression joint 12 is connected to an oil inlet hose 72, the first connection port is connected to the oil outlet of the oil pumping mechanism 20 (oil pump 22), the second connection port is connected to the end of the oil inlet hose 72 that is away from the compression joint 12, and the third connection port is connected to the oil storage tank 11 through an oil control hose 75, and the oil control hose 75 is provided with a bypass solenoid valve 76. The three-way structure of the connector 14 facilitates the connection between the compression joint 12, the oil pumping mechanism 20, and the oil storage tank 11, and the structure is compact, which reduces space occupation.

[0051] It can be understood that after the oil output by the oil pump mechanism 20 enters the connector 14, the oil is divided into two paths, one path of oil can enter the compression joint 12 via the second connector and the oil inlet hose 72, and the other path of oil can enter the oil storage tank 11 via the third connector and the oil control hose 75. When the measured meter 62 is tested, the bypass solenoid valve 76 is closed, the oil control hose 75 is blocked, and the oil output by the oil pump mechanism 20 can only enter the compression joint 12 via the second connector and the oil inlet hose 72; when the measured meter 62 is controlled, the bypass solenoid valve 76 is opened, the oil control hose 75 is unblocked, the oil pump mechanism 20 stops working, and the oil in the measured meter 62 can enter the connector 14 via the compression joint 12, the oil inlet hose 72, and the second connector, and enter the oil storage tank 11 via the third connector and the oil control hose 75.

[0052] According to some embodiments of the present application, Figure 1 and Figure 3 As shown, the flow regulating assembly 30 includes a diverter 31, a first branch, a second branch, a third branch, a first branch control valve 321, a first branch flow valve 322, a second branch control valve 331, a second branch flow valve 332, a third branch control valve 341, a third branch flow valve 342, and a confluence 35. The oil inlet end of the diverter 31 is connected to the oil outlet end of the standard meter 61 through an oil outlet hose 73, the oil outlet end of the diverter 31 is connected to the oil inlet end of the confluence 35 through the first branch, the second branch and the third branch respectively, and the oil outlet end of the confluence 35 is connected to the oil storage tank 11 through an oil return hose 74. It can be understood that the first branch, the second branch and the third branch are three branches arranged in parallel between the diverter 31 and the confluence 35. The first branch control valve 321 and the first branch flow valve 322 are arranged in series on the first branch, the second branch control valve 331 and the second branch flow valve 332 are arranged in series on the second branch, and the third branch control valve 341 and the third branch flow valve 342 are arranged in series on the third branch. For example, the first branch control valve 321 is located upstream of the first branch flow valve 322. Each branch control valve (collectively referred to as the first branch control valve 321, the second branch control valve 331 and the third branch control valve 341) is used to control the on-off of the corresponding branch, and each branch flow valve (collectively referred to as the first branch flow valve 322, the second branch flow valve 332 and the third branch flow valve 342) is used to adjust the flow of the corresponding branch. The flow of the corresponding branch is adjusted by the branch flow valve, and the on-off of the corresponding branch is controlled by the branch control valve, so as to facilitate the measurement accuracy test of different flow rates.

[0053] The first branch control valve 321, the second branch control valve 331 and the third branch control valve 341 are interlocked. For example, when the first branch control valve 321 is opened, the second branch control valve 331 and the third branch control valve 341 are closed, that is, when the three branch control valves are working, only one branch control valve is allowed to be opened. The first branch control valve 321, the second branch control valve 331 and the third branch control valve 341 are all electrically connected to the controller 81. For example, each branch control valve is a solenoid valve. Each branch flow valve can be a mechanical valve, such as a ball valve. In the initial state, each branch flow valve is manually adjusted to determine its own flow.

[0054] For ease of distinction, the first branch is defined as a large flow branch, the second branch is defined as a medium flow branch, and the third branch is defined as a small flow branch, that is, the opening of the first branch flow valve 322 is greater than the opening of the second branch flow valve 332, and the opening of the second branch flow valve 332 is greater than the opening of the third branch flow valve 342.

[0055] According to some embodiments of the present application, Figure 1 As shown, the frame 10 is provided with a guide seat 15 and a fixed seat 16, the clamping joint 12 is slidably matched with the guide seat 15, the fixed joint 13 is installed on the fixed seat 16, and a detection station is formed between the guide seat 15 and the fixed seat 16. As shown in the figure, the guide seat 15 and the fixed seat 16 are both installed on the second mounting plate 105, and the guide seat 15 is provided with a mounting hole for the clamping joint 12 to pass through, and the clamping joint 12 can be slidably passed through the mounting hole. The oil inlet hose 72 passes through the second mounting plate 105, and the oil inlet hose 72 is flexible. When the clamping joint 12 approaches or moves away from the fixed joint 13 relative to the guide seat 15, the oil inlet hose 72 follows the movement to avoid interference. In order to facilitate the assembly and disassembly of the components, the fixed joint 13 is detachably mounted on the fixed seat 16, and the guide seat 15 is detachably connected to the clamping joint 12.

[0056] According to some embodiments of the present application, Figure 1 As shown, the mobile driving mechanism 40 includes a driving handle 41, a screw rod 42, and a threaded sleeve 43. The threaded sleeve 43 is installed on the frame 10. One end of the screw rod 42 is connected to the driving handle 41, and the other end of the screw rod 42 passes through the threaded sleeve 43 and is connected to the clamping joint 12. The screw rod 42 and the threaded sleeve 43 are threadedly matched. The screw rod 42 is rotated by rotating the driving handle 41 to realize the linear movement of the clamping joint 12 relative to the frame 10. Through the matching mode of the screw rod 42 and the threaded sleeve 43, the movement adjustment accuracy of the clamping joint 12 is high, which is convenient for ensuring the clamping of the clamping joint 12 and the measured meter 62. In other embodiments of the present application, the mobile driving mechanism 40 can also be other linear driving mechanisms, such as a telescopic mechanism (oil cylinder, air cylinder, electric push rod, etc.), or a gear rack mechanism.

[0057] According to some embodiments of the present application, Figure 1 As shown, the oil control assembly 50 includes an oil control solenoid valve 51 and an oil control pipe 52. One end of the oil control pipe 52 is used to connect to a high-pressure gas source, and the other end of the oil control pipe 52 is connected to a fixed joint 13. The oil control solenoid valve 51 is disposed on the oil control pipe 52, and the oil control solenoid valve 51 is electrically connected to the controller 81. The high-pressure gas source and the fixed joint 13 are connected through the oil control pipe 52, so that when the oil control solenoid valve 51 is opened, the high-pressure gas source can deliver power to the measured meter 62 to discharge the oil in the measured meter 62.

[0058] After the measured meter 62 completes the detection, it is necessary to control the oil of the measured meter 62, that is, to discharge the oil in the measured meter 62. The oil control process of the measured meter 62 is as follows: the oil pumping mechanism stops working, the flow regulating component 30 is closed, the bypass solenoid valve 76 is opened, and the oil control solenoid valve 51 is opened. High-pressure air enters the fixed joint 13 through the oil control pipe 52, and then enters the measured meter 62, and the oil in the measured meter 62 is discharged to the oil storage tank 11 through the clamping joint 12, the oil inlet hose 72, the second connecting port, the third connecting port, the bypass solenoid valve 76, and the oil control hose 75.

[0059] According to some embodiments of the present application, the measured meter 62 has an adjustment mechanism, which is used to adjust the actual displacement of the measured meter 62 to compensate or correct the system error of the measured meter 62 and improve the accuracy of the measured meter 62. During the detection process, when the metering accuracy is tested, the measured meter 62 is compared with the standard meter 61, and the actual displacement of the measured meter 62 is adjusted by the adjustment mechanism to compensate or correct the error. For example, the adjustment mechanism includes a volume adjustment handle, and the actual displacement of the measured meter 62 is adjusted by the volume adjustment handle. In the meter detection process, this step is called the adjustment handle.

[0060] According to some embodiments of the present application, Figure 1 As shown, the meter detection station 100 also includes an alarm component 84, which is electrically connected to the controller 81 and is used to alarm when manual intervention is required during the detection process, so that the staff can respond quickly. Manual intervention items may include manual adjustment of the handle, measurement data not matching the preset data, abnormality of the component, end of the detection step, etc., but are not limited to the above situations. For example, the alarm component 84 can be a three-color lamp. When an abnormality occurs, the controller 81 controls the three-color lamp to light up to warn the staff.

[0061] According to some embodiments of the present application, the controller 81 is electrically connected to various electrical components (such as the oil pump motor 21, various solenoid valves, the data acquisition system 82, the alarm component 84, the display 83, etc.), and the controller 81 can be a PLC controller 81, which has programming inside to detect the measured meter 62. The electrical control principle of the embodiment of the present application refers to the control principle of the prior art, and this application will not be described in detail.

[0062] According to some embodiments of the present application, in the operating circuit composed of the oil pump 22, the measured meter 62, the standard meter 61, and various solenoid valves of the meter testing station 100, the direction of oil flow is: oil storage tank 11-oil inlet pipe 71-oil pump 22-oil inlet hose 72-measured meter 62-standard meter 61-oil outlet hose 73-first branch control valve 321 / second branch control valve 331 / third branch control valve 341-oil return hose 74-oil storage tank 11, the controller 81 controls each detection action to run automatically, processes the generated data, determines the detection result, and automatically generates a detection result record sheet through the background management system.

[0063] The detection method of the meter detection station 100 according to the embodiment of the present application is as follows:

[0064] Install the measured meter 62, place the measured meter 62 on the second installation layer 107 of the frame 10, connect the oil outlet of the measured meter 62 to the fixed joint 13, and clamp the oil inlet of the measured meter 62 to the clamp joint 12;

[0065] Press the start button, the oil pump motor 21 starts, the oil pump 22 works, the first branch control valve 321 opens, the sensor of the standard meter 61 and the sensor of the measured meter 62 rotate, the data acquisition system 82 collects the volume data of the standard meter 61 and the measured meter 62, and the controller 81 controls the display 83 to display the volume data of the standard meter 61 and the measured meter 62;

[0066] In the aging step, a preset volume of oil (e.g., 3000 liters) is passed through the measured meter 62, and after the aging is completed, the next step is entered;

[0067] Detect the relative error value of the measurement accuracy of 100 liters of the measured meter 62 and the measurement accuracy of the standard meter 61 (referred to as 100 liters Ev detection). The relative error value (Ev value) of the measurement accuracy of 100 liters of the measured meter 62 and the measurement accuracy of the standard meter 61 is measured for the first time. If the relative error value of 100 liters does not meet the requirements, the three-color light is on, prompting the handle to be adjusted. The Ev value of 100 liters is measured for the second time. If it is unqualified, continue to prompt the handle to be adjusted. If it is qualified, go to the next step;

[0068] Ev detection of large flow rate 50 liters, measuring the relative error value between the measurement accuracy of 50 liters and the measurement accuracy of the standard meter 61;

[0069] Ev detection at a medium flow rate of 20 liters, the first branch control valve 321 is closed, the second branch control valve 331 is opened, and the Ev value of 20 liters is measured;

[0070] Ev detection of a small flow rate of 20 liters, the second branch control valve 331 is closed, the third branch control valve 341 is opened, and the Ev value of 20 liters is measured;

[0071] The detection of three flow points, namely, large flow, medium flow and small flow, is a mandatory requirement of the national standard for fuel dispensers (GB / T9081). Therefore, this test bench must meet the requirements.

[0072] Oil control, the oil pump motor 21 stops working, the third branch control valve 341 is closed, the oil control solenoid valve 51 is opened, and the bypass solenoid valve 76 is closed. After the preset oil control time is completed, the oil control solenoid valve 51 is closed, and the bypass solenoid valve 76 is closed;

[0073] Remove the measured meter 62, turn the handle, loosen the measured meter 62, and remove the measured meter 62;

[0074] Fill in the record form, the controller 81 transmits the data collected by the data acquisition system 82 to the background management system to automatically determine the test results and automatically generate a record database;

[0075] Among them, between the "aging step" and the "Ev test at a small flow rate of 20 liters" steps, airtightness testing and lead sealing are carried out.

[0076] It should be pointed out that the lead sealing refers to sealing the connection between the encoder of the measured meter 62 and the measured meter 62 to prevent abnormal replacement of the encoder by human.

[0077] The oil flow path from step "press the start button" to "Ev detection with a small flow rate of 20 liters" is: oil storage tank 11-oil inlet pipe 71-oil pump 22-oil inlet hose 72-measured meter 62-standard meter 61-oil outlet hose 73-first branch control valve 321 / second branch control valve 331 / third branch control valve 341-first branch flow valve 322 / second branch flow valve 332 / third branch flow valve 342-oil return hose 74-oil storage tank 11; in step "oil control", the oil flow control path is: high-pressure gas source-oil control pipe 52-oil control solenoid valve 51-fixed joint 13-measured meter 62-compression joint 12-oil inlet hose 72-connector 14-bypass solenoid valve 76-oil control hose 75-oil storage tank 11.

[0078] In the detection method steps of the meter detection station 100, only the handle adjustment action during the 100-liter Ev detection requires shutdown, and other steps do not require shutdown, and the "air tightness test" and "lead sealing" can be arranged during the operation of the equipment. The meter detection station 100 improves the automation of meter detection, saves labor costs, and one person can operate multiple meter detection stations 100, thereby improving detection efficiency.

[0079] Through the background management system, the test results can be automatically processed, and the functions of storage, backup, retrieval, and printing of test data are added, replacing the original manually filled-in record form and paper document record form (usually need to be kept for 2 years). In addition, the record form is easier to query.

[0080] It should be noted that, in the absence of conflict, the features in the embodiments of this application may be combined with each other.

[0081] The above description is only the preferred embodiment of the present application and is not intended to limit the present application. For those skilled in the art, the present application may have various modifications and variations. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present application shall be included in the protection scope of the present application.

Claims

1. A measuring instrument testing platform, characterized in that: It includes a frame, an oil storage tank, an oil pump mechanism, a flow regulating component, a clamping joint, a fixed joint, a mobile driving mechanism, a standard meter, a data acquisition system, an oil control component, and a controller; The oil storage tank is arranged on the frame, the oil pumping mechanism is arranged on the frame, the clamping joint is slidably matched with the frame, the fixed joint is arranged on the frame, the oil inlet of the oil pumping mechanism is connected to the oil storage tank, the oil inlet end of the clamping joint is respectively connected to the oil outlet of the oil pumping mechanism and the oil storage tank, the oil inlet end of the fixed joint and the oil outlet end of the clamping joint define a detection station, the detection station is used to accommodate the measured meter, the mobile driving mechanism is used to drive the clamping joint to approach or move away from the fixed joint relative to the frame to clamp or release the measured meter, the oil outlet end of the fixed joint is connected to the oil inlet end of the standard meter, the oil outlet end of the standard meter is connected to the oil inlet end of the flow regulating component, and the oil outlet end of the flow regulating component is connected to the oil storage tank; The data acquisition system is used to collect data signals of the standard meter and the meter to be measured, the flow regulating component is used to control the flow of oil, one end of the oil control component is used to connect to the high-pressure gas source, the other end of the oil control component is connected to the fixed joint, and the oil control component is used to discharge the oil of the meter to be measured into the oil storage tank; The controller is electrically connected to the oil pump mechanism, the data acquisition system, the flow regulating component, and the oil control component respectively, and the controller is used for communication connection with the background management system; The meter detection platform also includes a connector, which is a tee, and has a first connection port, a second connection port and a third connection port. The oil inlet end of the compression joint is connected to an oil inlet hose, the first connection port is connected to the oil outlet of the oil pump mechanism, the second connection port is connected to the oil inlet hose, and the third connection port is connected to the oil storage tank through an oil control hose, and the oil control hose is provided with a bypass solenoid valve; The flow regulating assembly includes a diverter, a first branch, a second branch, a third branch, a first branch control valve, a first branch flow valve, a second branch control valve, a second branch flow valve, a third branch control valve, a third branch flow valve, and a confluence. The oil inlet of the diverter is connected to the oil outlet of the standard meter. The oil outlet of the diverter is connected to the oil inlet of the confluence through the first branch, the second branch and the third branch respectively. The oil outlet of the confluence is connected to the oil storage tank through an oil return hose. The first branch control valve and the first branch control valve are connected to each other. The flow valve is arranged in series on the first branch, the second branch control valve and the second branch flow valve are arranged in series on the second branch, the third branch control valve and the third branch flow valve are arranged in series on the third branch, the first branch control valve, the second branch control valve and the third branch control valve are interlocked, each branch control valve is used to control the on and off of the corresponding branch, and each branch flow valve is used to adjust the flow of the corresponding branch, and the first branch control valve, the second branch control valve and the third branch control valve are all electrically connected to the controller.

2. The measuring instrument testing platform according to claim 1, characterized in that: The oil control assembly includes an oil control solenoid valve and an oil control pipe, one end of the oil control pipe is used to connect to a high-pressure gas source, the other end of the oil control pipe is connected to the fixed joint, the oil control solenoid valve is arranged on the oil control pipe, and the oil control solenoid valve is electrically connected to the controller.

3. The measuring instrument testing platform according to claim 1, characterized in that: The meter detection station also includes an alarm component, and the alarm component is electrically connected to the controller.

4. The measuring instrument testing platform according to claim 1, characterized in that: The oil pumping mechanism includes an oil pumping motor and an oil pump. The oil pumping motor is electrically connected to the controller. The oil pumping motor is used to drive the oil pump to work. The oil inlet of the oil pump is connected to the oil storage tank through an oil inlet pipe, and the oil outlet of the oil pump is connected to the oil inlet end of the clamping joint.

5. The measuring instrument testing platform according to claim 1, characterized in that: The frame includes a first installation layer and a second installation layer which are stacked, the oil storage tank is located below the first installation layer, the second installation layer is located above the first installation layer, the oil pumping mechanism and the flow regulating assembly are located on the first installation layer, and the standard meter and the detection station are located on the second installation layer.

6. The measuring instrument testing platform according to claim 1, characterized in that: The meter detection station also includes a display, and the display is electrically connected to the controller.

7. The measuring instrument testing platform according to claim 1, characterized in that: The meter detection platform also includes an electric control cabinet, and the data acquisition system and the controller are both arranged in the electric control cabinet.

8. The measuring instrument testing platform according to claim 1, characterized in that: The mobile driving mechanism includes a driving handle, a screw rod, and a threaded sleeve. The threaded sleeve is installed on the frame. One end of the screw rod is connected to the driving handle. The other end of the screw rod passes through the threaded sleeve and is connected to the clamping joint. The screw rod is threadably matched with the threaded sleeve.

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