A meter performance testing system

Abstract

The application provides a meter performance test system, which comprises: a pumping device, an inlet of which is connected with an oil tank, and an outlet of which is connected with the oil tank through at least one meter, the pumping device being used for pumping liquid stored in the oil tank and pressurizing the liquid to flow through each meter and then be transmitted back into the oil tank; at least one controllable valve, each controllable valve being arranged at the outlet of a meter; and a control cabinet, which is connected with the pumping device and is used for controlling the pumping device to start pumping liquid and transmitting the pumped liquid to each meter according to an externally input starting signal; the control cabinet is also electrically connected with each controllable valve, and the control cabinet is used for changing the on-off state of each controllable valve according to a set time length, so that the liquid repeatedly impacts each meter to test each meter.

Description

Technical Field

[0001] This application relates to the field of measuring instrument testing technology, and more specifically, to a measuring instrument performance testing system. Background Technology

[0002] The performance test of the meter in a fuel dispenser is generally conducted by simulating the operation of the fuel dispenser, that is, by continuously passing liquid through the meter using a motor and pump to test the performance of the meter.

[0003] Current performance testing methods involve supplying a stable liquid flow rate to the meter during performance testing. However, a stable liquid flow rate cannot simulate the meter's state under actual refueling conditions. Therefore, the stable liquid flow rate performance testing method suffers from inaccurate meter performance testing. Summary of the Invention

[0004] The purpose of this application is to provide a meter performance testing system to solve the problem of inaccurate meter performance testing in the currently used stable liquid flow performance testing scheme.

[0005] In a first aspect, the present invention provides a metering performance testing system, the system comprising: an extraction device, the inlet of which is connected to an oil tank, and the outlet of which is connected to the oil tank via at least one metering device; the extraction device being used to extract liquid stored in the oil tank and pressurize the liquid so that it flows through each of the metering devices and is then transmitted back to the oil tank; at least one controllable valve, each controllable valve being disposed at the outlet of a metering device; a control cabinet being connected to the extraction device for controlling the extraction device to open and extract liquid according to an externally input start signal and transmit the extracted liquid to each metering device; the control cabinet being electrically connected to each of the controllable valves for changing the on / off state of each controllable valve according to a set duration, so as to achieve liquid impact on each metering device.

[0006] In the metering performance testing system designed above, the control cabinet controls the extraction device to extract liquid from the oil tank A. The extracted liquid is pressurized and then transferred from the outlet of the extraction device 10 to each metering device B to be tested. After passing through each metering device B, the liquid flows back into the oil tank A. During this cycle, the control cabinet 30 can control each controllable valve 20 to repeatedly open and close, thereby blocking and releasing the liquid flow through the metering device to be tested to form hydraulic pressure. This simulated hydraulic impact can more realistically reproduce the scenario of hydraulic impact on the metering device when the fuel dispenser is open and closed during operation. It simulates the working state of the metering device under actual refueling conditions, making the performance testing system designed in this application more in line with the actual situation. Therefore, the performance testing of the metering device is more accurate, solving the problem of inaccurate performance testing of the metering device in the current stable liquid flow performance testing scheme, and improving the accuracy of the metering performance testing.

[0007] In an optional embodiment of this example, there are multiple measuring devices, and the system further includes a diverter pipe, through which the outlet of the extraction device is connected to the inlet of each measuring device.

[0008] In an optional embodiment of this example, the diversion pipe includes a main pipe and multiple branch pipes. One end of the main pipe is connected to the outlet of the extraction device, and the other end of the main pipe is connected to each branch pipe. Each branch pipe returns the liquid to the oil tank through a meter.

[0009] In the above-described implementation, the extraction device is connected to each meter via a shunt tube, enabling the designed system to test multiple meters simultaneously, thereby improving the efficiency of meter performance testing when there are multiple meters.

[0010] In an optional embodiment of this example, at least one ball valve is further included, each ball valve being disposed on a branch pipe for regulating the liquid flow rate of the corresponding branch pipe.

[0011] In an optional embodiment of this example, the system further includes a filter, through which the outlet of the extraction device is connected to each of the meters.

[0012] In an optional embodiment of this example, the system further includes: at least one heat exchanger, each heat exchanger being disposed inside the oil tank, and a water circulator connected to each heat exchanger to circulate cold water to each heat exchanger, thereby cooling the liquid inside the oil tank.

[0013] In an optional embodiment of this example, the system further includes a temperature sensor disposed inside the oil tank and electrically connected to the control cabinet. The control cabinet is also used to receive the liquid temperature collected by the temperature sensor, and to control the water circulator to start to cool the liquid in the oil tank when the liquid temperature is higher than a first preset temperature; and to control the water circulator in operation to shut down when the liquid temperature is lower than a second preset temperature.

[0014] In an optional embodiment of this example, the system further includes a current detector connected to the extraction device for collecting the current of the extraction device; the control cabinet is connected to the current detector for controlling the extraction device to stop working when the current of the extraction device exceeds a preset current value.

[0015] In an optional embodiment of this example, the system further includes a liquid level alarm, which is installed inside the oil tank and is used to issue an alarm when the liquid level in the oil tank drops to a preset height.

[0016] In an optional embodiment of this example, the system further includes a pressure sensor disposed at the inlet of the metering device, the pressure sensor being used to measure the liquid pressure at the inlet of the metering device. Attached Figure Description

[0017] To more clearly illustrate the technical solutions of the embodiments of this application, the accompanying drawings used in the embodiments of this application will be briefly introduced below. It should be understood that the following drawings only show some embodiments of this application and should not be regarded as a limitation of the scope. For those skilled in the art, other related drawings can be obtained based on these drawings without creative effort.

[0018] Figure 1 A front view of the meter performance testing system provided in the embodiments of this application;

[0019] Figure 2 This is a top view of the meter performance testing system provided in an embodiment of this application.

[0020] Icons: A - Oil tank; B - Meter to be tested; 10 - Extraction device; 20 - Controllable valve; 30 - Control cabinet; 40 - Diverter pipe; 401 - Main pipe; 402 - Branch pipe; 50 - Ball valve; 60 - Filter; 70 - Heat exchanger; 80 - Water circulator; 90 - Temperature sensor; 100 - Current detector; 110 - Liquid level alarm; 120 - Frame; 130 - Partition; 140 - Upper space; 150 - Lower space; 160 - Pressure sensor. Detailed Implementation

[0021] The technical solutions in the embodiments of this application will now be described with reference to the accompanying drawings.

[0022] This application provides a measuring instrument performance testing system. This system can simulate the operation of a measuring instrument, thereby evaluating its performance, lifespan, etc. The system, for example... Figure 1 As shown, the device includes an extraction device 10, at least one controllable valve 20, and a control cabinet 30. The inlet of the extraction device 10 is connected to an oil tank A, and the outlet of the extraction device 10 is connected to the oil tank A through at least one metering device B to be tested. The controllable valve 20 can change its switching state based on a signal sent by the control cabinet 30, i.e., it can open or close according to the signal sent by the control cabinet 30. The number of controllable valves 20 is the same as the number of metering devices B to be tested, and each controllable valve 20 is located at the outlet of a metering device B to be tested. The control cabinet 30 is electrically connected to the extraction device 10 and each controllable valve 20. As one possible implementation, the extraction device 10 can be a submersible pump or a self-priming pump, etc. The controllable valve 20 can specifically be a solenoid valve or other electronically controllable valve, as well as a pneumatic / hydraulic switching valve, etc.

[0023] In the above-designed meter performance testing system, the control cabinet 30 can receive an externally input start signal during operation and control the extraction device 10 to start according to the externally input start signal. The start signal can be obtained by the operator inputting it into the control cabinet 30. For example, the operator can press the start button on the control cabinet 30 to input the start signal.

[0024] After the extraction device 10 is started under the control of the control cabinet 30, the extraction device 10 can extract the liquid in the oil tank A, and then pressurize the extracted liquid and transfer it from the outlet of the extraction device 10 to each metering device B to be tested. After passing through each metering device B to be tested, the liquid flows back into the oil tank A. This cycle is repeated to realize the periodic simulation of the working state of the metering device.

[0025] Because this application's solution includes a controllable valve 20 at the outlet of each meter B to be tested, and each controllable valve 20 is electrically connected to the control cabinet 30, the control cabinet 30 can change the on / off state of each controllable valve 20 according to a set duration. For example, the initial state of each controllable valve 20 can be open, and the control cabinet 30 can close each controllable valve 20 after 20 seconds. After closing each controllable valve 20, it can be reopened after 1 or 2 seconds. Then, after each controllable valve 20 is opened... After 20 seconds, each controllable valve 20 is closed again. After closing each controllable valve 20, it is opened again after 1 or 2 seconds. This repeated opening and closing of the controllable valves 20 can realize the opening and closing of the liquid flow, thereby subjecting the metering device B to be tested to hydraulic shock. This simulated hydraulic shock can more realistically reproduce the scenario of hydraulic shock to the metering device when the fuel dispenser is opened and closed during operation, thus making the performance test of the metering device by the system designed in this application more accurate.

[0026] The meter performance testing system designed above uses a control cabinet to control an extraction device to draw liquid from tank A. The extracted liquid is pressurized and then transferred from the outlet of the extraction device 10 to each meter under test, B. After passing through each meter under test, the liquid flows back into tank A. During this cycle, the control cabinet 30 can control each controllable valve 20 to repeatedly open and close, thereby blocking and releasing the liquid flow through the meter under test, creating hydraulic pressure. This simulated hydraulic impact more realistically recreates the scenario of hydraulic impact on the meter during the operation of the fuel dispenser, where the dispenser is opened and closed intermittently. This simulates the actual working state of the meter under refueling conditions, making the performance testing system designed in this application more consistent with actual conditions. Therefore, the performance testing of the meter is more accurate, solving the problem of inaccurate meter performance testing in currently used stable liquid flow performance testing schemes, and improving the accuracy of meter performance testing.

[0027] In an optional implementation of this embodiment, when there are multiple measuring instruments B to be tested, such as... Figure 2 As shown, the performance testing system also includes a diversion pipe 40, through which the outlet of the extraction device 10 is connected to the inlet of each meter B to be tested; as one possible implementation, the diversion pipe 40 includes a main pipe 401 and multiple branch pipes 402. Figure 2(There are three in the middle). One end of the main pipe 401 is connected to the outlet of the extraction device 10, and the other end of the main pipe 401 is connected to each branch pipe 402. Each branch pipe 402 is connected to the oil tank A through a meter B to be tested. The diameter of the main pipe 401 is larger than the diameter of each branch pipe 402. Through the design of the above-mentioned branch pipe 40, the performance testing system designed in this application can simultaneously test the performance of multiple meters B to be tested.

[0028] In an optional implementation of this embodiment, such as Figure 2 As shown, the performance testing system also includes at least one ball valve 50, the number of which is the same as the number of branch pipes 402. Each ball valve 50 is installed on a branch pipe 402, and each ball valve 50 can be used to adjust the liquid flow rate of the corresponding branch pipe 402 under manual operation by the operator.

[0029] In an optional implementation of this embodiment, such as Figure 2 As shown, the performance testing system may also include a filter 60, which is disposed between the extraction device 10 and each metering device B to be tested. The outlet of the extraction device 10 is connected to each metering device B to be tested through the filter 60. The filter 60 can be used to remove impurities from the extracted liquid to prevent impurities from entering the metering device B or the oil pipeline and causing blockage.

[0030] In an optional implementation of this embodiment, such as Figure 2 As shown, the performance testing system may further include at least one heat exchanger 70 and a water circulator 80. Each heat exchanger 70 is disposed within the oil tank A, and the water circulator 80 is connected to each heat exchanger 70 to circulate cold water into each heat exchanger 70, thereby achieving water cooling of the liquid in the oil tank. As a possible implementation, the performance testing system may further include a temperature sensor 90 disposed within the oil tank and electrically connected to a control cabinet 30. The water circulator 80 is also electrically connected to the control cabinet 30. The control cabinet 30 can be used to receive the liquid temperature collected by the temperature sensor 90, and control the water circulator 80 to turn on to cool the liquid in the oil tank when the liquid temperature is higher than a first preset temperature; and control the water circulator 80 to turn off when the liquid temperature is lower than a second preset temperature.

[0031] In an optional implementation of this embodiment, such as Figure 1As shown, the performance testing system may also include a current detector 100, which is electrically connected to the extraction device 10. The current detector 100 is also electrically connected to the control cabinet 30, which is used to receive the operating current of the extraction device 10 detected by the current detector 100. When the operating current exceeds a preset current value, the control cabinet 30 controls the extraction device 10 to stop working, thereby preventing the extraction device 10 from overloading and causing a fire hazard.

[0032] In an optional implementation of this embodiment, such as Figure 1 As shown, the performance testing system may also include a liquid level alarm 110, which is installed in the oil tank A and is used to trigger an alarm when the liquid level in the oil tank A drops to a preset height.

[0033] In an optional implementation of this embodiment, such as Figure 1 As shown, the performance testing system may also include a rack 120, which is divided into an upper space 140 and a lower space 150 by a partition 130. The upper space 140 is used to house the extraction device 10, the filter 60, the diversion pipe 40, and the meter B, while the lower space 150 is used to house the oil tank A. As one possible implementation, the extraction device 10, the filter 60, and the meter B can be connected to their respective mounting plates, which are connected to the partition 130 by uniform screws. This allows for the replacement of different models of the extraction device 10, the filter 60, and the meter B, thereby improving the compatibility of the designed performance testing system for various products.

[0034] In an optional implementation of this embodiment, such as Figure 1 As shown, the performance testing system may also include a pressure sensor 160, which is disposed at the inlet of the metering device B and is used to measure the liquid pressure at the inlet of the corresponding metering device B.

[0035] In the embodiments provided in this application, it should be understood that the disclosed apparatus and methods can be implemented in other ways. The apparatus embodiments described above are merely illustrative. For example, the division of units is only a logical functional division, and in actual implementation, there may be other division methods. Furthermore, multiple units or components may be combined or integrated into another system, or some features may be ignored or not executed. Additionally, the displayed or discussed mutual couplings, direct couplings, or communication connections may be through some communication interfaces; indirect couplings or communication connections between devices or units may be electrical, mechanical, or other forms.

[0036] Furthermore, the units described as separate components may or may not be physically separate. The components shown as units may or may not be physical units; that is, they may be located in one place or distributed across multiple network units. Some or all of the units can be selected to achieve the purpose of this embodiment according to actual needs.

[0037] Furthermore, the functional modules in the various embodiments of this application can be integrated together to form an independent part, or each module can exist independently, or two or more modules can be integrated to form an independent part.

[0038] In this document, relational terms such as first and second are used only to distinguish one entity or operation from another entity or operation, without necessarily requiring or implying any such actual relationship or order between these entities or operations.

[0039] The above description is merely an embodiment of this application and is not intended to limit the scope of protection of this application. Various modifications and variations can be made to this application by those skilled in the art. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of this application should be included within the scope of protection of this application.

Claims

1. A meter performance testing system, characterized by, The system includes: An extraction device has its inlet connected to an oil tank and its outlet connected to the oil tank via at least one meter. The extraction device is used to extract liquid stored in the oil tank and pressurize the liquid so that it flows through each of the metering devices and is then transferred back to the oil tank. At least one controllable valve, each controllable valve being located at the outlet of a meter; A control cabinet, connected to the extraction device, is used to control the extraction device to start extracting liquid and transfer the extracted liquid to each metering device according to an externally input start signal. The control cabinet is also electrically connected to each of the controllable valves. The control cabinet is used to change the on / off state of each controllable valve according to a set time, so as to realize repeated hydraulic shock of liquid to each metering device for testing each metering device; wherein, the controllable valve is a solenoid valve.

2. The system of claim 1, wherein, The system includes multiple measuring devices and a diverter pipe, through which the outlet of the extraction device is connected to the inlet of each measuring device.

3. The system of claim 2, wherein, The diversion pipe includes a main pipe and multiple branch pipes. One end of the main pipe is connected to the outlet of the extraction device, and the other end of the main pipe is connected to each branch pipe. Each branch pipe returns the liquid to the oil tank through a meter.

4. The system according to claim 3, characterized in that, The system also includes at least one ball valve, each of which is disposed on a branch pipe for regulating the liquid flow rate of the corresponding branch pipe.

5. The system according to claim 1, characterized in that, The system also includes a filter, through which the outlet of the extraction device is connected to each of the meters.

6. The system according to claim 1, characterized in that, The system also includes: At least one heat exchanger, each of which is disposed within an oil tank. A water circulator is connected to each of the heat exchangers to circulate cold water into each of the heat exchangers, thereby cooling the liquid in the oil tank.

7. The system according to claim 6, characterized in that, The system also includes a temperature sensor installed inside the oil tank. The temperature sensor is electrically connected to the control cabinet. The control cabinet is also used to receive the liquid temperature collected by the temperature sensor, and to control the water circulator to start to cool the liquid in the oil tank when the liquid temperature is higher than a first preset temperature; and to control the water circulator to shut down when the liquid temperature is lower than a second preset temperature.

8. The system according to claim 1, characterized in that, The system also includes a current detector connected to the extraction device for collecting the current of the extraction device; The control cabinet is connected to the current detector to control the extraction device to stop working when the current of the extraction device exceeds a preset current value.

9. The system according to claim 1, characterized in that, The system also includes a liquid level alarm, which is installed inside the oil tank and is used to sound an alarm when the liquid level in the oil tank drops to a preset height.

10. The system according to claim 1, characterized in that, The system also includes a pressure sensor disposed at the inlet of the meter, the pressure sensor being used to measure the liquid pressure at the inlet of the meter.

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