An instrument calibration device

Abstract

This utility model relates to the field of instrument calibration technology, specifically to an instrument calibration device. The instrument calibration device provided by this utility model includes a water tank, a meter under test, a standard meter, and an electronic scale. Two independent weighing water tanks are mounted inside the water tank via a vertical support, and the bottom of each weighing water tank is in direct contact with the weighing platform on the electronic scale. A Y-shaped diverter is connected to one side of the water tank via a main inlet pipe, which divides the main inlet pipe into a first branch and a second branch. The first branch is connected in series with the meter under test and a first flow regulating valve, and the second branch is connected in series with the standard meter and a second flow regulating valve. The output ends of the first and second branches are respectively connected to the corresponding weighing water tanks. The two ends of the meter under test and the standard meter are connected and fixed to the first and second branches via quick-release clamps.

Description

Technical Field

[0001] This utility model relates to the field of instrument calibration technology, and specifically to an instrument calibration device. Background Technology

[0002] In the field of fluid flow meter calibration, traditional calibration devices typically employ a series piping structure, connecting the meter under test and the standard meter sequentially within the same water flow path. Its core components include a water tank (a container for storing water), the meter under test (the flow meter to be calibrated), the standard meter (a reference flow meter with known accuracy), and an electronic scale (a measuring device used to measure the mass of the water flow to calculate the flow rate). The water tank provides a stable water source for calibration; the meter under test is the target instrument to be calibrated; the standard meter serves as the flow reference, used to compare the measurement results with those of the meter under test; and the electronic scale calculates the actual flow rate by weighing the water flow and considering the water density.

[0003] However, existing technologies have the following drawbacks: First, in a series structure, the pressure of the meter under test and the standard meter interfere with each other, leading to flow measurement deviations, and the measurement time is also long; second, the weighing unit is usually a whole-tank structure, which results in insufficient load capacity and low resolution for small flow rate calibration; third, water temperature fluctuations cause changes in water density, affecting the accuracy of flow calculation; fourth, the connection between the instrument and the pipeline requires disassembly and installation of each component, leading to a long calibration preparation time. These problems limit calibration efficiency and accuracy and urgently require improvement. Utility Model Content

[0004] The purpose of this invention is to provide an instrument calibration device that solves the problems of pressure interference, low weighing accuracy, water temperature fluctuation and inconvenient disassembly and assembly in the prior art through the design of parallel pipelines, independent weighing water tanks, constant temperature control and quick-installation structure.

[0005] The present invention provides an instrument calibration device, comprising a water tank, an instrument under test, a standard instrument, and an electronic scale. The water tank contains two independent weighing water tanks mounted on a vertical support, the bottom of which is in direct contact with the weighing platform of the electronic scale. A Y-shaped diverter is connected to one side of the water tank via a main inlet pipe, dividing the main inlet pipe into a first branch and a second branch. The first branch connects the instrument under test and a first flow regulating valve in series, and the second branch connects the standard instrument and a second flow regulating valve in series. The outputs of the first and second branches are respectively connected to their corresponding weighing water tanks. The two ends of the instrument under test and the standard instrument are connected and fixed to the first and second branches via quick-release clamps.

[0006] As a preferred technical solution of this utility model, the side wall of the water tank is provided with a constant temperature control module. The constant temperature control module includes a temperature sensor, a heater and a circulating water pump. The inlet of the circulating water pump is connected to the water tank, and the outlet is connected to the main water inlet pipe through an insulated pipe. The insulated pipe is heated by the heater and then connected to the main water inlet pipe. The temperature heater is located on the insulated pipe before and after the heater.

[0007] As a preferred technical solution of this utility model, the quick-connect clamp structure includes a quick-connect connector and a radial locking clamp, wherein the quick-connect connector is provided with an axial positioning groove, and the radial locking clamp is located at the axial positioning groove.

[0008] As a preferred technical solution of this utility model, the Y-type splitter is provided with an adjustable guide plate. The guide plate is rotatably connected to the Y-type splitter through a rotating shaft, and one end of the rotating shaft extends to the outside of the Y-type splitter and is connected to an angle scale. The rotating shaft is provided with an indicator needle at the angle scale.

[0009] As a preferred technical solution of this utility model, the top of the weighing water tank is provided with a splash-proof funnel, which has a conical structure. Its wide end is connected to the outlet of the first branch or the second branch, and its narrow end is connected to the inner cavity of the water tank. The bottom of the weighing water tank is provided with a drain outlet with a valve, which is used to directly discharge water into the water pool outside the vertical support. The exterior of the vertical support is coated with a waterproof coating.

[0010] As a preferred technical solution of this utility model, the electronic scale is a shockproof weighing sensor, and a shock-absorbing rubber pad is provided between its bottom and the vertical support.

[0011] The advantages of this utility model compared with the prior art are as follows:

[0012] 1. Parallel piping design: The Y-type flow divider enables parallel testing of the instrument under test and the standard instrument, eliminating the problem of pressure interference when connected in series; dual flow regulating valves independently control the flow of the branches, ensuring synchronous comparison of the standard instrument and the instrument under test at different flow points, improving the accuracy of calibration; in addition, the parallel piping design can effectively reduce the time required for a single measurement.

[0013] 2. Independent Weighing Water Tank: The weighing unit is reduced from a whole pool to an independent water tank, which greatly reduces the weighing load and improves the resolution of the electronic scale for small flow calibration; combined with the anti-splash funnel design, it reduces the weighing error caused by water flow impact, further improving the accuracy of small flow measurement. At the same time, the water in the weighing water tank can be directly discharged into the water pool for recycling.

[0014] 3. Constant temperature control module: The temperature sensor monitors the water temperature in real time, and together with the heater and circulating water pump, it maintains the water temperature in the pool, solves the problem of density change caused by water temperature fluctuation, ensures the stability of the fluid state, and improves the accuracy of standard meter verification.

[0015] 4. Quick-install clamp structure: The combination of axial positioning groove and radial locking clamp enables quick disassembly and assembly of instruments, shortens the calibration preparation time, and is especially suitable for batch testing of multi-specification instruments, thereby improving testing efficiency.

[0016] 5. Adjustable baffle: The baffle angle can be adjusted by rotating the shaft, and with the visual indication of the angle dial, the problem of flow distribution deviation in parallel pipelines can be solved, and the precise ratio adjustment of the two flow paths can be achieved to meet the flow requirements of different verification scenarios. Attached Figure Description

[0017] Figure 1 The present invention relates to the structure of an instrument calibration device. Figure 1 .

[0018] Figure 2 The present invention relates to the structure of an instrument calibration device. Figure 2 .

[0019] Figure 3 This is a three-dimensional cross-sectional view of the weighing water tank section of an instrument calibration device according to this utility model.

[0020] Figure 4 This is a structural diagram of the Y-type shunt of an instrument calibration device according to this utility model.

[0021] Figure 5 This is a structural diagram of the quick-release clamp structure of an instrument calibration device according to this utility model.

[0022] As shown in the figure:

[0023] 1. Water tank; 2. Test table; 3. Standard table; 4. Electronic scale; 5. Vertical support; 6. Weighing water tank; 7. Main inlet pipe; 8. Y-type diverter; 9. First branch; 10. Second branch; 11. First flow regulating valve; 12. Second flow regulating valve; 13. Thermostatic control module; 14. Heater; 15. Circulating water pump; 16. Insulated pipeline; 17. Quick-connect connector; 18. Radial locking clamp; 19. Axial positioning groove; 20. Adjustable guide plate; 21. Rotating shaft; 22. Angle scale; 23. Splash-proof funnel; 24. Shock-absorbing rubber pad. Detailed Implementation

[0024] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0025] In the description of this utility model, it should be noted that, unless otherwise explicitly specified and limited, the terms "installed," "equipped with," and "connected," etc., should be interpreted broadly. For example, "connected" can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection or an indirect connection through an intermediate medium; it can be a connection within two components. Those skilled in the art can understand the specific meaning of the above terms in this utility model based on the specific circumstances.

[0026] Example 1:

[0027] As per the instruction manual Figure 1-3 As shown, an instrument calibration device includes a water tank 1, an instrument under test 2, a standard instrument 3, and an electronic scale 4. Inside the water tank 1, two independent weighing water tanks 6 are provided by a vertical support 5. The exterior of the vertical support 5 is coated with waterproof paint. The bottom of the weighing water tank 6 is in direct contact with the weighing platform on the electronic scale 4. The electronic scale 4 is a shockproof weighing sensor, and a shock-absorbing rubber pad 24 is provided between its bottom and the vertical support 5.

[0028] In this utility model, a constant temperature control module 13 is provided on the side wall of the water tank 1. The constant temperature control module 13 includes a temperature sensor, a heater 14 and a circulating water pump 15. The inlet of the circulating water pump 15 is connected to the water tank 1. The heat-insulated pipe 16 is heated by the heater 14 and then connected to the main water inlet pipe 7. The temperature heater 14 is located on the heat-insulated pipe 16 before and after the heater 14.

[0029] In this utility model, a Y-type diverter 8 is connected to one side of the water tank 1 via a main water inlet pipe 7. The outlet of the circulating water pump 15 is connected to the main water inlet pipe 7 via an insulated pipe 16. The Y-type diverter 8 divides the main water inlet pipe 7 into a first branch 9 and a second branch 10.

[0030] In this utility model, the first branch 9 is connected in series with the meter under test 2 and the first flow regulating valve 11, and the second branch 10 is connected in series with the standard meter 3 and the second flow regulating valve 12. The output ends of the first branch 9 and the second branch 10 are respectively connected to the corresponding weighing water tank 6. The top of the weighing water tank 6 is provided with a splash-proof funnel 23. The splash-proof funnel 23 has a conical structure. Its wide end is connected to the outlet of the first branch 9 or the second branch 10, and its narrow end is connected to the inner cavity of the water tank. The bottom of the weighing water tank 6 is provided with a drain outlet with a valve for directly draining water into the water pool 1 outside the vertical support 5.

[0031] As per the instruction manual Figure 4 As shown, the Y-type splitter 8 is equipped with an adjustable guide plate 20. The guide plate is rotatably connected to the Y-type splitter 8 via a rotating shaft 21. One end of the rotating shaft 21 extends to the outside of the Y-type splitter 8 and is connected to an angle scale 22. An indicator needle is provided at the angle scale 22 on the rotating shaft 21.

[0032] As per the instruction manual Figure 5 As shown, the two ends of the tested table 2 and the standard table 3 are connected and fixed to the first branch 9 and the second branch 10 through a quick-connect clamp structure. The quick-connect clamp structure includes a quick-connect connector 17 and a radial locking clamp 18. The quick-connect connector 17 is provided with an axial positioning groove 19, and the radial locking clamp 18 is located at the axial positioning groove 19. The radial locking clamp 18 is a quick-connect clamp used in the prior art. In addition, the quick-connect connector 17 is connected to the tested table 2 and the standard table 3 through a flange. During the measurement stage, the two ends of the next tested table 2 or standard table 3 can be fixed to the quick-connect connector 17 through the flange for advance preparation.

[0033] Working principle

[0034] 1. System preheating and constant temperature control: When the constant temperature control module 13 is turned on, the circulating water pump 15 starts and transports the water in the water tank 1 to the heater 14 for heating through the heat-insulated pipe 16. The temperature sensor provides real-time feedback on the water temperature. When the water temperature reaches the set value (e.g., 25℃), the heater 14 stops heating and the system enters a constant temperature state to ensure stable water flow density.

[0035] 2. Pipeline connection and flow regulation: The gauge under test 2 and the standard gauge 3 are connected to the first branch 9 and the second branch 10 respectively through quick-connect clamps. During the measurement stage, the two ends of the next gauge under test 2 can be fixed to the quick-connect connector 17 through flanges, reducing the time required for testing. Rotate the rotating shaft 21 of the Y-type flow divider 8 and adjust the angle of the guide plate through the angle scale 22 so that the initial flow ratio of the two channels meets the verification requirements (e.g., 1:1).

[0036] 3. Flow input and weighing: Open the main valve of the water inlet pipe 7. The water flows through the Y-type diverter 8 and is divided into two paths, which flow through the test meter 2 and the standard meter 3 respectively. Fine-tune the branch flow through the first flow regulating valve 11 and the second flow regulating valve 12 until the mass change rate (i.e. flow value) of the two water tanks displayed on the electronic scale 4 is stable. Record the reading of the standard meter 3 and the reading of the test meter 2 to complete one flow comparison.

[0037] 4. Quick instrument change and repeated verification: After verification, loosen the radial locking clamp 18 of the quick-release clamp structure, remove the instrument under test 2 or standard instrument 3, replace the next instrument to be tested, and repeat steps 2-3 to achieve batch testing of multiple specifications of instruments.

[0038] 5. Drainage and cleaning: After the calibration is completed, open the drain port at the bottom of the weighing water tank 6 and drain the water in the tank back into the water pool 1. Use the waterproof coating on the outside of the vertical support 5 to prevent the vertical support 5 from rusting, and the calibration work is completed.

[0039] The present invention and its embodiments have been described above. This description is not restrictive, and the specific embodiments shown are only one of the embodiments of the present invention. The actual structure is not limited to this. In short, if a person skilled in the art is inspired by this description and designs a similar structure and embodiment without departing from the inventive spirit of the present invention, such design should fall within the protection scope of the present invention.

Claims

1. An instrument calibration device, comprising a water tank (1), an instrument under test (2), a standard instrument (3), and an electronic scale (4), characterized in that: The water tank (1) is equipped with two independent weighing water tanks (6) through a vertical support (5), and the bottom of the weighing water tank (6) is in direct contact with the weighing platform on the electronic scale (4); One side of the water tank (1) is connected to a Y-type splitter (8) via a main water inlet pipe (7). The Y-type splitter (8) splits the main water inlet pipe (7) into a first branch (9) and a second branch (10). The first branch (9) is connected in series with the meter under test (2) and the first flow regulating valve (11), and the second branch (10) is connected in series with the standard meter (3) and the second flow regulating valve (12). The output ends of the first branch (9) and the second branch (10) are respectively connected to the corresponding weighing water tank (6). The two ends of the test table (2) and the standard table (3) are connected and fixed to the first branch (9) and the second branch (10) through a quick-release clamp structure.

2. The instrument calibration device according to claim 1, characterized in that: The side wall of the water tank (1) is provided with a constant temperature control module (13). The constant temperature control module (13) includes a temperature sensor, a heater (14) and a circulating water pump (15). The inlet of the circulating water pump (15) is connected to the water tank (1), and the outlet is connected to the main water inlet pipe (7) through a heat-insulated pipe (16). The heat-insulated pipe (16) is connected to the main water inlet pipe (7) after being heated by the heater (14), and the temperature heater (14) is located on the heat-insulated pipe (16) before and after the heater (14).

3. The instrument calibration device according to claim 1, characterized in that: The quick-release clamp structure includes a quick-release connector (17) and a radial locking clamp (18), wherein the quick-release connector (17) is provided with an axial positioning groove (19), and the radial locking clamp (18) is located at the axial positioning groove (19).

4. The instrument calibration device according to claim 1, characterized in that: The Y-type splitter (8) is provided with an adjustable guide plate (20). The guide plate is rotatably connected to the Y-type splitter (8) via a rotating shaft (21). One end of the rotating shaft (21) extends to the outside of the Y-type splitter (8) and is connected to an angle scale (22). An indicator needle is provided at the angle scale (22) on the rotating shaft (21).

5. The instrument calibration device according to claim 1, characterized in that: The weighing water tank (6) is provided with a splash-proof funnel (23) on the top. The splash-proof funnel (23) has a conical structure. Its wide end is connected to the outlet of the first branch (9) or the second branch (10), and its narrow end is connected to the inner cavity of the water tank. The bottom of the weighing water tank (6) is provided with a drain outlet with a valve, which is used to directly discharge water into the water pool (1) outside the vertical support (5). The outside of the vertical support (5) is coated with a waterproof coating.

6. The instrument calibration device according to claim 1, characterized in that: The electronic scale (4) is a shockproof weighing sensor, and a shock-absorbing rubber pad (24) is provided between its bottom and the vertical support (5).

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