A test device for a level gauge

Abstract

The application relates to a testing device for a level meter, comprising: a water storage tank; a first liquid tank, the top of the first liquid tank being provided with a first water inlet and a first testing port, the first water inlet being communicated with the water storage tank through a first pipeline, the bottom of the first liquid tank being provided with a first water outlet, the first water outlet being communicated with the water storage tank through a second pipeline; a second liquid tank, the top of the second liquid tank being provided with a second water inlet and a second testing port, the second water inlet being communicated with the water storage tank through the first pipeline, the bottom of the second liquid tank being provided with a second water outlet, the second water outlet being communicated with the water storage tank through a third pipeline; the liquid in the water storage tank being delivered into the first liquid tank and / or the second liquid tank through a first delivery pump, the liquid in the first liquid tank being discharged into the water storage tank through the second pipeline under the action of gravity, the liquid in the second liquid tank being discharged into the water storage tank through a second circulating pump; the level meter detecting the liquid level in the first liquid tank from the first testing port and / or detecting the liquid level in the second liquid tank from the second testing port.

Description

Technical Field

[0001] This application relates to the field of testing equipment technology, and in particular to a testing device for level gauges. Background Technology

[0002] Radar level gauges use microwave pulse measurement and can be used normally within the industrial frequency band. Due to their low beam deflection energy, they can be installed in various metal and non-metal containers or pipes to perform non-contact continuous measurement of the level of liquids, slurries, and granular materials. They are particularly suitable for occasions with large changes in dust, temperature, and pressure, and the presence of inert gases and vapors.

[0003] To test the accuracy of a radar level gauge, various test conditions need to be provided to verify its accuracy using data collected under different test conditions. Summary of the Invention

[0004] Embodiments of this application provide a testing device for a level gauge, which includes two liquid tanks of different sizes, and the liquids in the two liquid tanks can circulate independently or flow between each other, thereby simulating more different detection conditions.

[0005] In one embodiment of this application, a testing device for a level gauge is provided, comprising:

[0006] Water storage tank;

[0007] The first liquid tank has a first inlet and a first test port at the top, the first inlet being connected to the water storage tank via a first pipe, and a first outlet at the bottom, the first outlet being connected to the water storage tank via a second pipe.

[0008] The second liquid tank has a second inlet and a second test port at the top. The second inlet is connected to the water storage tank via a first pipe. The second liquid tank has a second outlet at the bottom. The second outlet is connected to the water storage tank via a third pipe.

[0009] Wherein, the diameter of the first liquid tank is smaller than the diameter of the second liquid tank, and the height of the first liquid tank is smaller than the height of the second liquid tank; the second liquid tank is located downstream of the first liquid tank, the first pipeline has a first delivery pump located upstream of the first liquid tank, and the third pipeline has a second circulation pump.

[0010] The liquid in the water storage tank is transported to the first liquid tank and / or the second liquid tank via the first delivery pump. The liquid in the first liquid tank is discharged to the water storage tank via the second pipeline under the action of gravity. The liquid in the second liquid tank is discharged to the water storage tank via the second circulation pump.

[0011] The level gauge detects the liquid level in the first liquid tank from the first test port and / or detects the liquid level in the second liquid tank from the second test port.

[0012] In one embodiment, the side wall of the first liquid tank has a first bypass port, which is connected to the first pipeline via a first bypass pipe.

[0013] The side wall of the second liquid tank has a second bypass port, which is connected to the first pipeline via a second bypass pipe;

[0014] The liquid in the water storage tank is transported from the first bypass port to the first liquid tank via the first delivery pump, and / or from the second bypass port to the second liquid tank;

[0015] The first bypass pipe is connected to or closed to the first pipeline via the first intake valve;

[0016] The second bypass pipe is connected to or closed to the first pipe via the second intake valve.

[0017] In one embodiment, the sidewall of the first liquid tank has a pair of third bypass ports, and the sidewall of the second liquid tank has a pair of fourth bypass ports.

[0018] The third bypass port and the fourth bypass port are connected via a pair of fourth bypass pipes, which are connected via a connecting pipe. The connecting pipe includes a third circulation pump, through which the liquids in the first liquid tank and the second liquid tank circulate with each other. The connecting pipe also includes a second opening valve, which controls the flow rate of the connecting pipe.

[0019] In one embodiment, each of the fourth bypass pipes includes a third intake valve and a fourth intake valve, wherein the third intake valve controls the connection or closure of the third bypass port with the connecting pipe, and the fourth intake valve controls the connection or closure of the fourth bypass port with the connecting pipe.

[0020] In one embodiment, a pair of first bypass ports are included, the pair of first bypass ports being adjacent to the top and bottom of the first liquid tank, respectively;

[0021] It includes a pair of second bypass ports, which are respectively adjacent to the top and bottom of the second liquid tank.

[0022] In one embodiment, the first liquid tank includes a pair of first stirring rods, the pair of first stirring rods being spaced apart along the height direction of the first liquid tank, and the pair of first stirring rods being located between the pair of first bypass ports;

[0023] The second liquid tank includes a pair of second stirring rods, which are spaced apart along the height of the second liquid tank and are located between the pair of second bypass ports.

[0024] In one embodiment, the first liquid tank has a plurality of first heating rods, which are located adjacent to the bottom of the first liquid tank and are spaced at equal angles.

[0025] The second liquid tank has a plurality of second heating rods, which are located near the bottom of the second liquid tank and are spaced at equal angles.

[0026] In one embodiment, the first pipeline includes a first opening valve that controls the flow rate of the first pipeline;

[0027] The third pipeline includes a third opening valve, which controls the flow rate of the third pipeline.

[0028] In one embodiment, it includes:

[0029] A level gauge that detects the liquid level in the first liquid tank and the second liquid tank.

[0030] In one embodiment, a graphical user interface is included, which displays and controls the liquid level information in the first liquid tank and / or the liquid level information in the second liquid tank.

[0031] This embodiment provides a testing device that can perform measurements under various operating conditions using a radar level gauge while storing liquid in a liquid tank. This device is convenient to use and improves measurement accuracy. By simulating different flow rates of liquid entering the tank, this embodiment compensates for the shortcomings in the testing process during the research and development of radar level gauges.

[0032] In order to provide more complex operating condition simulations, this embodiment provides a test device including two liquid tanks, wherein the two liquid tanks are of different sizes and the liquids in the two liquid tanks can circulate independently or flow between each other, thereby simulating more different operating conditions. Attached Figure Description

[0033] The following figures are for illustrative purposes only and do not limit the scope of this application.

[0034] Figure 1 This is a schematic diagram of the structure of the first embodiment of the testing device for a level gauge according to this application.

[0035] Figure 2 This is a partial structural schematic diagram of the testing device for a level gauge according to this application. Detailed Implementation

[0036] The differences allow for the simulation of a wider range of working conditions.

[0037] The first liquid tank 20 and the second liquid tank 30 are positioned differently relative to the water storage tank 10. Specifically, the volume, diameter, and height of the first liquid tank 20 are smaller than those of the second liquid tank 30, and the first liquid tank 20 is located upstream of the second liquid tank 30. The first liquid tank 20 and the second liquid tank 30 are connected in series to a first pipeline 31, and the liquid in the water storage tank 10 is sequentially transported to the first liquid tank 20 and the second liquid tank 30 via the first pipeline 31. The first inlet of the first liquid tank 20 is located at the top of the first liquid tank 20, and the first outlet is located at the bottom of the first liquid tank 20. The first inlet is connected to the water storage tank 10 via the first pipeline 31, and the first outlet is connected to the water storage tank 10 via the second pipeline 32. The first liquid tank 20 can be vertically positioned above the water storage tank 10. When the second pipeline 32 is opened, the liquid in the first liquid tank 20 can be discharged into the water storage tank 10 under gravity or driven by a pump. There may be one or more first inlets, and they may include, for example, first inlets of different diameters to provide simulations of various flow rates. The top of the first liquid tank 20 also includes one or more first test ports, through which the radar level gauge to be tested can detect the liquid level within the first liquid tank 20. For example, the top of the first liquid tank 20 may include two DN50 first test ports and two DN80 first test ports. The radar level gauge may be installed on one or more first test ports.

[0038] In a specific example, the first liquid tank 20 is 1.6m high, 1.5m in diameter, and has a capacity of 2.83m³. The second liquid tank 30 is 2.85m high, 2.5m in diameter, and has a capacity of 13.98m³.

[0039] In the flow direction of the first pipeline 31, the second liquid tank 30 is located downstream of the first liquid tank 20, and its volume, diameter, and height are all larger than those of the first liquid tank 20. The second inlet of the second liquid tank 30 is located at its top, and the second outlet is located at its bottom or side wall. The second outlet is connected to the storage tank 10 via a third pipeline 33. Liquid in the second liquid tank 30 is discharged to the storage tank 10 via a second circulation pump 42 in the third pipeline 33. There may be one or more second inlets, for example, including second inlets of different diameters to provide simulations of various flow rates. The top of the second liquid tank 30 also includes one or more second test ports, through which the radar level gauge to be tested can detect the liquid level in the second liquid tank 30. For example, the top of the second liquid tank 30 may include two DN50 second test ports and two DN80 second test ports. The radar level gauge can be installed at one or more second test ports.

[0040] The injection methods of the first liquid tank 20 and the second liquid tank 30 can be combined and adjusted to achieve various different operating conditions. For example, the first and second water inlets can be controlled to be open or closed by opening or closing the air inlet valve. By controlling the opening and closing of the first and second water inlets, the injection methods of the first liquid tank 20 and the second liquid tank 30 can be configured as simultaneous injection, injection only from the first liquid tank 20, or injection only from the second liquid tank 30. For example, different injection speeds of the first liquid tank 20 and the second liquid tank 30 can be controlled by controlling the flow rate and velocity in the first pipeline 31.

[0041] This embodiment provides a testing device comprising two liquid tanks of different sizes, which can simulate a wider range of working conditions. The radar level gauge performs measurements under various working conditions while the liquid tanks are being used, which is convenient to use and improves the accuracy of the measurements.

[0042] In a preferred embodiment, the side wall of the first liquid tank 20 has a first bypass port, which is connected to the first pipeline 31 via a first bypass pipe 34;

[0043] The side wall of the second liquid tank 30 has a second bypass port, which is connected to the first pipeline 31 via a second bypass pipe 35.

[0044] The liquid in the water storage tank 10 is transported from the first bypass port to the first liquid tank 20 via the first transfer pump 41, and / or from the second bypass port to the second liquid tank 30;

[0045] The first bypass pipe 34 is connected to or closed by the first intake valve 71.

[0046] The second bypass pipe 35 is connected to or closed by the first pipe 31 via the second intake valve 72.

[0047] In a preferred embodiment, a pair of first bypass ports are included, the pair of first bypass ports being adjacent to the top and bottom of the first liquid tank 20, respectively;

[0048] It includes a pair of second bypass ports, which are located adjacent to the top and bottom of the second liquid tank 30, respectively.

[0049] In this example, in addition to providing a top injection method, the test device also adds a side injection method through the setting of a bypass pipe, thereby forming a more complex working condition.

[0050] Unlike existing test systems that only include one liquid tank, the test apparatus in this example includes two liquid tanks of different sizes and in different positions, so that they can be used in combination to simulate more complex working conditions.

[0051] In a preferred embodiment, the sidewall of the first liquid tank 20 has a pair of third bypass ports, and the sidewall of the second liquid tank 30 has a pair of fourth bypass ports.

[0052] The third bypass port and the fourth bypass port are connected by a pair of fourth bypass pipes 36, which are connected by a connecting pipe 37. The connecting pipe 37 includes a third circulation pump 43, through which the liquids in the first liquid tank 20 and the second liquid tank 30 circulate with each other. The connecting pipe 37 includes a second opening valve 37a, which controls the flow rate of the connecting pipe 37.

[0053] When the third circulation pump 43 is turned on, the liquids in the first liquid tank 20 and the second liquid tank 30 leave the first liquid tank 20 and the second liquid tank 30 through one of the fourth bypass pipes, then mix in the connecting pipe 37, and respectively enter the first liquid tank 20 and the second liquid tank 30 through the other fourth bypass pipe 36. The second opening valve 37a is used to control the flow rate of the connecting pipe 37.

[0054] Each fourth bypass pipe 36 includes a third intake valve 73 and a fourth intake valve 74. The third intake valve 73 controls the connection or closure of the third bypass port and the connecting pipe 37, and the fourth intake valve 74 controls the connection or closure of the fourth bypass port and the connecting pipe 37.

[0055] Driven by the third circulation pump 43, the fourth bypass port is closed to the connecting pipe 37 by the fourth air inlet valve 74, thereby realizing the self-circulation of the liquid in the first liquid tank 20; the third bypass port is closed to the connecting pipe 37 by the third air inlet valve 73, thereby realizing the self-circulation of the liquid in the second liquid tank 30; and the liquids in the first liquid tank 20 and the second liquid tank 30 are mutually circulated by opening the third air inlet valve 73 and the fourth air inlet valve 74.

[0056] In a specific example, the first liquid tank 20 includes a pair of first stirring rods 51, which are spaced apart along the height direction of the first liquid tank 20, and the pair of first stirring rods 51 are located between a pair of first bypass ports.

[0057] The second liquid tank 30 includes a pair of second stirring rods 52, which are spaced apart along the height direction of the second liquid tank 30 and are located between a pair of second bypass ports.

[0058] A pair of first bypass ports are respectively located near the top and bottom of the first liquid tank 20 to cover the entire volume of the first liquid tank 20. Along the height of the first liquid tank 20, a pair of first stirring rods 51 are spaced apart between the pair of first bypass ports to ensure thorough stirring of the liquid within the first liquid tank 20. Understandably, the number of first stirring rods 51 can be appropriately increased.

[0059] Similarly, a pair of second bypass ports are respectively located adjacent to the top and bottom of the second liquid tank 30 to cover the entire volume of the second liquid tank 30. Along the height of the second liquid tank 30, a pair of second stirring rods 52 are spaced apart between the pair of second bypass ports to ensure thorough mixing of the liquid within the second liquid tank 30. Understandably, the number of second stirring rods 52 can be appropriately increased.

[0060] For example, the first liquid tank 20 has two 720mm long first stirring rods at bottom heights of 399mm and 899mm, with a stirring speed of 0-125rpm. The second liquid tank 30 has two 720mm long second stirring rods at bottom heights of 250mm and 850mm, with a stirring speed of 0-91rpm.

[0061] Furthermore, combined Figure 2 As shown, the first liquid tank 20 has a plurality of first heating rods 61, which are located near the bottom of the first liquid tank 20 and are spaced at equal angles.

[0062] Similarly, the second liquid tank 30 has a plurality of second heating rods 62, which are located near the bottom of the second liquid tank 30 and are spaced at equal angles.

[0063] Multiple first heating rods 61 are arranged radially around the center of the first liquid tank 20, and are spaced at equal angles. Multiple second heating rods 62 are arranged radially around the center of the second liquid tank 30, and are spaced at equal angles. The first and second heating rods control the liquid temperature in the liquid tanks between 5℃ and 80℃.

[0064] In the entire circulation link, the first pipeline 31 includes a first opening valve 31a, which controls the flow rate of the first pipeline 31; the third pipeline 33 includes a third opening valve 33a, which controls the flow rate of the third pipeline 33.

[0065] To verify the correctness of the radar level gauge under test, the testing apparatus of this example further includes: a level gauge for detecting the liquid level in the first liquid tank 20 and the second liquid tank 30 as standard data. Preferably, the level gauge can be a tuning fork level gauge. The test data of the tuning fork level gauge is used as standard data for comparison with the test data of the radar level gauge under test, thereby calibrating the accuracy of the radar level gauge's test data.

[0066] For example, the tuning fork level gauge can be selected as model ZP300C-200BFN, which has an applicable temperature range of -20℃ to 80℃ and is suitable for DN25 diameter.

[0067] Furthermore, the testing device in this embodiment also includes a graphical user interface, which is used to display and control the liquid level information in the first liquid tank 20 and / or the liquid level information in the second liquid tank 30.

[0068] A graphical user interface (GUI) is a computer operating user interface that uses a graphical display to allow users to interact with electronic devices through graphical icons and visual indicators (such as windows, buttons, menus, etc.). In this example, the GUI can be viewed as a combination module of control buttons and a display screen, used for direct user control, for example, the opening and closing of the first transfer pump 41, the second transfer pump 42, and the third circulation pump 43; the opening and closing of the tuning fork level gauge and the radar level gauge; the opening and closing of the air inlet valve; the flow rate of the opening valve; the opening and closing of the stirring rod; the opening and closing of the heating rod; and the heating temperature. Furthermore, it is also used to display the operating status of the controlled components, such as their on / off status, opening degree, temperature, liquid level, flow rate in the pipeline, etc.

[0069] In this embodiment, the graphical user interface can be an existing, already developed interface. The interface can be adapted to the test system of this example by data matching. The development and setup of the graphical user interface are not within the scope of protection claimed in this embodiment. For example, the cycle control system can adopt a visual operating system based on a Siemens S7-1200 series CPU, digital and analog modules, and real-time monitoring via a touchscreen.

[0070] In this embodiment, the testing device is used by installing the radar level gauge to be tested above the test port and operating the liquid level rise and fall and various working conditions to be simulated through a graphical user interface.

[0071] Specifically, operating condition simulation can include the following operations and settings.

[0072] 1) Stirring operation:

[0073] After setting the speed as needed, start the mixing with the first and / or second mixing rods.

[0074] 2) Inlet and outlet water circulation operation:

[0075] Open the first opening valve 31a to an opening degree of 70% or more, and select the first air inlet valve 71 or the second air inlet valve 72 to start the first liquid tank 20 or the second liquid tank 30 to enter water.

[0076] Open the third opening valve 33a to more than 70% to start the return water from the first liquid tank 20 or the second liquid tank 30.

[0077] Open the second opening valve 37a to more than 70% to start the circulation of the first liquid tank 20 or the second liquid tank 30.

[0078] 3) Heating operation:

[0079] Set the target and hysteresis temperatures, select the heating element to be activated, select the keep-warm button if heat preservation is required, and finally activate the heating button.

[0080] According to the testing apparatus in this example, the detectable operating conditions include, but are not limited to, the following:

[0081] 1. Liquid level rise and fall test: Select the required air inlet valve on the graphical user interface to perform water inlet and outlet operations.

[0082] 2. Condensation test: Set the heating temperature to 80℃ on the graphical user interface (the stirring function must be turned on before heating can be turned on, and the liquid level must not be lower than the set minimum liquid level), and then observe the condensation phenomenon on the bypass pipe.

[0083] 3. Liquid stirring test: After setting the required rotation speed on the graphical user interface, turn on the stirring function.

[0084] 4. Liquid tilt angle test: After selecting water inlet or outlet on the graphical user interface, adjust the test angle of the radar level gauge and then perform the test.

[0085] This embodiment proposes a solution for using radar level gauges to measure liquids in tanks under various operating conditions, offering both ease of use and improved measurement accuracy. By setting up multiple liquid tanks and their interconnections, this example compensates for shortcomings in the testing process during the development of radar level gauges by simulating different flow rates of liquid at the top and sides of the tanks. Connecting two tanks of different sizes, simultaneously providing heating, stirring, and loading / unloading functions, can simulate more complex on-site conditions. Using a tuning fork level gauge for liquid level comparison allows for more precise control of the liquid level. The distance measured by the radar level gauge can be converted and displayed on a graphical user interface using the current value, greatly simplifying the tooling and improving testing efficiency.

[0086] The above are merely preferred embodiments of this application and are not intended to limit this application. 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 testing device for a level gauge, characterized in that, include: Water storage tank (10); The first liquid tank (20) has a first inlet and at least one first test port at the top. The first inlet is connected to the water storage tank (10) via a first pipe (31). The first liquid tank (20) has a first outlet at the bottom. The first outlet is connected to the water storage tank (10) via a second pipe (32). The second liquid tank (30) has a second inlet and at least one second test port at the top. The second inlet is connected to the water storage tank (10) via a first pipe (31). The second liquid tank (30) has a second outlet at the bottom. The second outlet is connected to the water storage tank (10) via a third pipe (33). Wherein, the diameter of the first liquid tank (20) is smaller than the diameter of the second liquid tank (30), and the height of the first liquid tank (20) is smaller than the height of the second liquid tank (30); the second liquid tank (30) is located downstream of the first liquid tank (20), the first pipeline (31) has a first delivery pump (41) located upstream of the first liquid tank (20), and the third pipeline (33) has a second circulation pump (42). The liquid in the water storage tank (10) is transported to the first liquid tank (20) and / or the second liquid tank (30) via the first delivery pump (41). The liquid in the first liquid tank (20) is discharged to the water storage tank (10) via the second pipeline (32). The liquid in the second liquid tank (30) is discharged to the water storage tank (10) via the second circulation pump (42). The level gauge detects the liquid level in the first liquid tank (20) from the first test port and / or detects the liquid level in the second liquid tank (30) from the second test port.

2. The testing device for a level gauge according to claim 1, characterized in that, The side wall of the first liquid tank (20) has a first bypass port, which is connected to the first pipeline (31) via a first bypass pipe (34). The side wall of the second liquid tank (30) has a second bypass port, which is connected to the first pipeline (31) via a second bypass pipe (35). The liquid in the water storage tank (10) is transported from the first bypass port to the first liquid tank (20) via the first delivery pump (41), and / or from the second bypass port to the second liquid tank (30). The first bypass pipe (34) is connected to or closed to the first pipeline (31) via the first intake valve (71); The second bypass pipe (35) is connected to or closed to the first pipe (31) via the second intake valve (72).

3. The testing device for a level gauge according to claim 1, characterized in that, The side wall of the first liquid tank (20) has a pair of third bypass ports, and the side wall of the second liquid tank (30) has a pair of fourth bypass ports; The third bypass port and the fourth bypass port are connected via a pair of fourth bypass pipes (36), which are connected via a connecting pipe (37). The connecting pipe (37) includes a third circulation pump (43), through which the liquids in the first liquid tank (20) and the second liquid tank (30) circulate with each other via the third circulation pump (43). The connecting pipe (37) includes a second opening valve (37a), which controls the flow rate of the connecting pipe (37).

4. The testing device for a level gauge according to claim 3, characterized in that, Each of the fourth bypass pipes (36) includes a third intake valve (73) and a fourth intake valve (74), wherein the third intake valve (73) controls the connection or closure of the third bypass port with the connecting pipe (37), and the fourth intake valve (74) controls the connection or closure of the fourth bypass port with the connecting pipe (37); So that, driven by the third circulation pump (43), the liquids in the first liquid tank (20) and the second liquid tank (30) circulate with each other, and / or the liquids in the first liquid tank (20) circulate by themselves, and / or the liquids in the second liquid tank (30) circulate by themselves.

5. The testing device for a level gauge according to claim 2, characterized in that, Includes a pair of first bypass ports, the pair of first bypass ports being adjacent to the top and bottom of the first liquid tank (20), respectively; It includes a pair of second bypass ports, which are respectively adjacent to the top and bottom of the second liquid tank (30).

6. The testing device for a level gauge according to claim 5, characterized in that, The first liquid tank (20) includes a pair of first stirring rods (51), which are spaced apart along the height direction of the first liquid tank (20) and are located between the pair of first bypass ports. The second liquid tank (30) includes a pair of second stirring rods (52), which are spaced apart along the height direction of the second liquid tank (30) and are located between the pair of second bypass ports.

7. The testing device for a level gauge according to claim 1, characterized in that, The first liquid tank (20) has a plurality of first heating rods (61) inside, the plurality of first heating rods (61) being adjacent to the bottom of the first liquid tank (20) and being arranged at equal angular intervals; The second liquid tank (30) has a plurality of second heating rods (62) located adjacent to the bottom of the second liquid tank (30) and spaced at equal angles.

8. The testing device for a level gauge according to claim 1, characterized in that, The first pipeline (31) includes a first opening valve (31a), which controls the flow rate of the first pipeline (31); The third pipeline (33) includes a third opening valve (33a), which controls the flow rate of the third pipeline (33).

9. The testing device for a level gauge according to claim 1, characterized in that, include: A level gauge that detects the liquid level in the first liquid tank (20) and the second liquid tank (30).

10. The testing device for a level gauge according to claim 1, characterized in that, It includes a graphical user interface that displays and controls the liquid level information in the first liquid tank (20) and / or the liquid level information in the second liquid tank (30).

Images