Electromagnetic water meter calibration device

Abstract

The utility model relates to the field of water meter detection, and particularly discloses an electromagnetic water meter calibration device which comprises a detection mechanism, a first water supply mechanism and a second water supply mechanism. Each detection unit comprises a straight pipe, a first pressure transmitter, a first standard meter, a meter clamping device, a temperature sensor, a second standard meter and a second pressure transmitter, and optimization of a liquid flowing path is achieved through a multi-stage three-way pipe. The first water supply mechanism and the second water supply mechanism respectively adopt a water pump and a piston water suction assembly to circularly supply water, so that the system stability and accuracy are ensured. The effect of improving the calibration precision of the electromagnetic water meter is achieved.

Description

Technical Field

[0001] This application relates to the field of water meter testing, and in particular to an electromagnetic water meter calibration device. Background Technology

[0002] Currently, electromagnetic water meters, as an important flow measurement device, are widely used in industrial production and urban water supply systems. With technological advancements and social development, the application scope of electromagnetic water meters continues to expand, and the requirements for their accuracy and reliability are becoming increasingly stringent. To ensure the accuracy and stability of electromagnetic water meters, calibration devices have become indispensable tools. Calibration devices precisely calibrate electromagnetic water meters by simulating actual usage environments, thereby guaranteeing the accuracy of their measurement results. Currently, various types of electromagnetic water meter calibration devices are available on the market, and these devices play a crucial role in improving the performance of electromagnetic water meters.

[0003] Existing electromagnetic water meter calibration devices typically mount the meter under test and a standard meter on a straight pipe. When testing the meter under test, water flows through the pipe to simulate the operating state of the electromagnetic water meter. By comparing the data from the meter under test and the standard meter under the same operating environment, the device's qualification is determined.

[0004] The aforementioned technologies have the following drawbacks: when water flows through a straight pipe, pressure fluctuations and unstable flow rates are likely to occur, leading to inaccurate calibration results. Utility Model Content

[0005] To make the testing of the meter to be tested more accurate, this application provides an electromagnetic water meter calibration device.

[0006] The electromagnetic water meter calibration device provided in this application adopts the following technical solution:

[0007] An electromagnetic water meter calibration device includes a testing mechanism. The testing mechanism includes an inlet pipe, an outlet pipe, and multiple testing units. Each testing unit includes a straight pipe, a first pressure transmitter, a first standard meter, a clamping device, a temperature sensor, a second standard meter, and a second pressure transmitter. The inlet end of each straight pipe is connected to the outlet end of the inlet pipe, and the outlet end of each straight pipe is connected to the outlet end of the outlet pipe. From the inlet pipe to the outlet pipe, the first pressure transmitter, the first standard meter, the clamping device, the temperature sensor, the second standard meter, and the second pressure transmitter are sequentially installed on the straight pipe. The clamping device is used to clamp the meter under test.

[0008] By adopting the above technical solution, the straight pipe serves as the detection channel, ensuring stable water flow and improving measurement accuracy. The first and second pressure transmitters monitor the pressure at the inlet and outlet of the straight pipe, respectively, ensuring the stability of the water flow pressure and thus improving measurement accuracy. The first and second standard gauges are used to calibrate the gauge under test, ensuring the reliability of the measurement results. A gauge clamp is used to fix the gauge under test, ensuring its stable position during testing and avoiding errors caused by movement. A temperature sensor monitors the water temperature changes within the straight pipe in real time, compensating for the influence of temperature on flow measurement and further improving measurement accuracy. The entire detection mechanism improves calibration efficiency through the parallel connection of multiple detection units, while multi-point monitoring ensures the comprehensiveness and accuracy of the data.

[0009] Preferably, the plurality of straight pipes are spaced apart in the vertical direction and are detachably connected to the inlet pipe and the outlet pipe.

[0010] By adopting the above technical solution, the vertically spaced distribution of multiple straight pipes allows for a compact arrangement of the detection units, saving space and facilitating operation and maintenance. Simultaneously, the detachable connection design between the straight pipes and the inlet and outlet pipes facilitates equipment assembly and disassembly, improving the equipment's flexibility and maintainability.

[0011] Preferably, the detection mechanism further includes multiple first tee pipes and multiple second tee pipes, each of which is correspondingly arranged with respect to multiple straight pipes. Each first tee pipe includes a first vertical pipe and a first side pipe. The first side pipe is horizontally installed on the side wall of the first vertical pipe. In the vertical direction, multiple first vertical pipes are connected in sequence, and the inlet end of the lowest first vertical pipe is connected to the outlet end of the water inlet pipe, while the outlet end of the highest first vertical pipe is closed. Each second tee pipe includes a second vertical pipe and a second side pipe. The second side pipe is horizontally installed on the side wall of the second vertical pipe. In the vertical direction, multiple second vertical pipes are connected in sequence, and the inlet end of the lowest second vertical pipe is connected to the inlet end of the water outlet pipe, while the outlet end of the highest second vertical pipe is closed. The inlet end of each straight pipe is connected to the outlet end of the corresponding first side pipe, and the outlet end of each straight pipe is connected to the outlet end of the corresponding second side pipe.

[0012] By adopting the above technical solution, the design of the first and second three-way pipes enables the liquid to be evenly distributed to each detection unit, ensuring stable flow rate within each detection unit and improving calibration accuracy. Specifically, the structural design of the first three-way pipe and the first side pipe achieves uniform distribution of liquid from the inlet pipe to each straight pipe, avoiding measurement errors caused by uneven flow velocity. The structural design of the second three-way pipe and the second side pipe ensures that the liquid flows smoothly from each straight pipe into the outlet pipe, reducing fluctuations in the liquid flow process and further improving the accuracy of the calibration results. In the vertical direction, multiple first vertical pipes are connected sequentially, and multiple second vertical pipes are connected sequentially, allowing testing personnel to connect multiple first three-way pipes and multiple second three-way pipes together in the vertical direction according to actual needs. Furthermore, multiple straight pipes can be connected to corresponding first and second three-way pipes in the vertical direction, enabling portable assembly and connection of multiple units in the vertical direction. This facilitates equipment maintenance and replacement, as well as the setting of different numbers of detection units.

[0013] Preferably, the electromagnetic water meter calibration device further includes a first water supply mechanism, which includes a first valve, a water tank, a second valve, and a water pump. The outlet end of the water outlet pipe, the first valve, the water tank, the second valve, the water pump, and the inlet end of the water inlet pipe are connected in sequence.

[0014] By adopting the above technical solution, the sequential connection of the outlet end of the water pipe, the first valve, the water tank, the second valve, the water pump, and the inlet end of the inlet pipe ensures that water can return from the outlet pipe to the inlet pipe, forming a closed-loop system. This enables circulating water supply and reduces water waste. The first valve controls the opening and closing of the water flow, preventing backflow and ensuring safe system operation. The water tank, as a storage container, can store sufficient water to prevent calibration interruptions due to insufficient water supply. The second valve regulates the water flow rate, ensuring a stable flow into the water pump. The water pump is responsible for pumping water from the water tank to the inlet pipe, ensuring the continuity and stability of the water flow, thus making the entire calibration process more efficient and accurate.

[0015] Preferably, a pressure stabilizing tank is connected between the water pump and the inlet end of the water inlet pipe, and a third valve is connected between the pressure stabilizing tank and the inlet end of the water inlet pipe.

[0016] By adopting the above technical solution, the pressure stabilizing tank can effectively stabilize the water flow pressure entering the testing mechanism, ensuring that the pressure transmitters and standard gauges of each testing unit can operate under constant pressure conditions, thereby improving testing accuracy and reliability. The third valve facilitates control of the connection between the pressure stabilizing tank and the inlet pipe, simplifying system debugging and maintenance.

[0017] Preferably, the electromagnetic water meter calibration device further includes a second water delivery mechanism, which includes a fourth valve, a water tower, a fifth valve, a piston suction assembly, and a sixth valve. The outlet end of the water outlet pipe, the fourth valve, the water tower, the fifth valve, the piston suction assembly, the sixth valve, and the inlet end of the water inlet pipe are connected in sequence. The piston suction assembly is used for quantitative water intake and quantitative water discharge.

[0018] By adopting the above technical solution, the outlet end of the water pipe, the fourth valve, the water tower, the fifth valve, the piston suction assembly, the sixth valve, and the inlet end of the water inlet pipe are connected sequentially. This ensures that water can return from the outlet pipe to the inlet pipe, forming a closed-loop system and achieving circulating water supply, thus reducing water waste. The fourth valve controls the water flow into the water tower, ensuring sufficient water volume. The fifth valve controls the water flow into the piston suction assembly, achieving precise water volume control. The piston suction assembly can not only quantitatively absorb water but also quantitatively discharge water, ensuring the stability and accuracy of the water flow. The sixth valve controls the water flow back to the inlet pipe, ensuring smooth circulation.

[0019] Preferably, the piston water suction assembly includes a cylinder, a connecting pipe, and a piston. One end of the cylinder is closed, and the other end is open. One end of the connecting pipe is connected to the closed end of the cylinder, and the other end is connected to the liquid outlet of the fifth valve and the liquid inlet of the sixth valve. The piston is located inside the open end of the cylinder and is dynamically sealed to the cylinder along the length of the cylinder.

[0020] By adopting the above technical solution, when water needs to be supplied to the testing unit, the fifth valve opens and the sixth valve closes. The moving piston draws water from the water tower into the cylinder. Then, the fifth valve closes and the sixth valve opens, and the moving piston expels the water from the water tower into the cylinder. The water flows sequentially through the sixth valve and the inlet pipe, thus quantitatively delivering the water to the testing unit. This ensures consistent test conditions each time, improving calibration accuracy and reliability. The connecting pipe serves as both an inlet and outlet, ensuring a smooth water flow path and avoiding flow instability caused by improper pipe connections.

[0021] Preferably, the piston includes a sealing portion and a conical portion. The sealing portion is disposed inside the open end of the cylinder and is dynamically sealed to the cylinder along the length of the cylinder. The conical portion is disposed between the sealing portion and the closed end of the cylinder. The maximum outer diameter of the conical portion is less than and / or equal to the maximum outer diameter of the sealing portion, and the end of the conical portion with the larger diameter is connected to the sealing portion.

[0022] By adopting the above technical solution, the maximum outer diameter of the conical part is less than and / or equal to the maximum outer diameter of the sealing part, so that there is a certain gap between the conical part and the inner wall of the cylinder. When the piston reciprocates in the cylinder, the air bubbles in the liquid in the cylinder can accumulate in the gap between the piston and the inner wall of the cylinder, so that the air bubbles in the liquid are less likely to affect the accuracy of the liquid volume.

[0023] Preferably, the outlet end of the water outlet pipe is provided with a four-way pipe, the first end of the four-way pipe is connected to the outlet end of the water outlet pipe, the second end is connected to the inlet end of the first valve, the third end is connected to the inlet end of the fourth valve, and the fourth end is equipped with a drain valve.

[0024] By adopting the above technical solution, the four-way pipe configuration allows the outlet end of the water pipe to be connected to both the first and second water delivery mechanisms simultaneously, thus enabling the selection of two different water delivery methods and improving the system's flexibility and applicability. The drain valve facilitates drainage operations during system maintenance, simplifies the maintenance process, and reduces maintenance time.

[0025] In summary, this application includes at least one of the following beneficial technical effects:

[0026] 1. In this application, by sequentially installing a first pressure transmitter, a first standard gauge, a clamping device, a temperature sensor, a second standard gauge, and a second pressure transmitter on a straight pipe, the pressure and temperature changes at each detection point can be monitored and recorded in real time, ensuring parameter stability during the detection process and improving the accuracy of calibration results.

[0027] 2. The first tee pipe and the second tee pipe in this application can connect an appropriate number of testing units between the inlet pipe and the outlet pipe according to the actual number of gauges to be tested, which facilitates batch testing of multiple gauges to be tested and improves the batch testing efficiency of gauges to be tested.

[0028] 3. The sequential connection of the outlet end of the water pipe, the first valve, the water tank, the second valve, the water pump, and the inlet end of the water inlet pipe in this application ensures that the water flow can return from the outlet pipe to the inlet pipe, forming a closed-loop system that enables cyclic water supply and reduces water waste.

[0029] 4. In this application, the outlet end of the water outlet pipe, the fourth valve, the water tower, the fifth valve, the piston suction assembly, the sixth valve, and the inlet end of the water inlet pipe are connected in sequence to ensure that the water flow can return from the outlet pipe to the inlet pipe, forming a closed-loop system, realizing circulating water supply, and reducing the waste of water resources.

[0030] 5. In this application, the maximum outer diameter of the conical part is less than and / or equal to the maximum outer diameter of the sealing part, so that there is a certain gap between the conical part and the inner wall of the cylinder. When the piston reciprocates in the cylinder, the air bubbles in the liquid in the cylinder can accumulate in the gap between the piston and the inner wall of the cylinder, so that the air bubbles in the liquid are less likely to affect the accuracy of the liquid volume. Attached Figure Description

[0031] To more clearly illustrate the technical solutions in the embodiments of this application, the accompanying drawings used in the description of the embodiments will be briefly introduced below. Obviously, the accompanying drawings described below are only some embodiments of this application. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0032] Figure 1 A schematic diagram of the overall structure of Embodiment 2 of this application;

[0033] Figure 2 This is a schematic diagram of the detection unit;

[0034] Figure 3 This is a cross-sectional structural diagram of the piston water suction assembly.

[0035] Figure label:

[0036] 1. Testing agency; 11. Inlet pipe; 12. Outlet pipe;

[0037] 13. First tee pipe; 131. First vertical pipe; 132. First side pipe;

[0038] 14. Second tee pipe; 141. Second vertical pipe; 142. Second side pipe;

[0039] 15. Detection unit; 150. Straight pipe; 152. First pressure transmitter; 151. First standard gauge; 153. Gauge under test; 154. Gauge clamp; 155. Temperature sensor; 156. Second standard gauge; 157. Second pressure transmitter;

[0040] 2. First water delivery mechanism; 21. First valve; 22. Water tank; 23. Second valve; 24. Water pump; 25. Pressure stabilizing tank; 26. Third valve;

[0041] 3. Second water delivery mechanism; 31. Fourth valve; 32. Water tower; 33. Fifth valve;

[0042] 34. Piston suction assembly; 340. Cylinder; 3401. Reinforcing flange; 341. Connecting pipe; 342. Piston; 3421. Sealing part; 3422. Conical part; 343. Top support; 344. Guide rod; 345. Conduit; 346. Protective pipe; 347. Nut; 348. Screw; 349. Motor;

[0043] 35. The sixth valve;

[0044] 4. Four-way pipe; 41. Drain valve;

[0045] 5. Robotic arm. Detailed Implementation

[0046] The following is in conjunction with the appendix Figure 1-3 This application will be described in further detail.

[0047] This application discloses an electromagnetic water meter calibration device. (Refer to...) Figure 1 , Figure 2 and Figure 3 An electromagnetic water meter calibration device includes a detection mechanism 1, which comprises an inlet pipe 11, an outlet pipe 12, and multiple detection units 15. Each detection unit 15 includes a straight pipe 150, a first pressure transmitter 152, a first standard gauge 151, a gauge clamp 154, a temperature sensor 155, a second standard gauge 156, and a second pressure transmitter 157. The straight pipe 150 serves as a detection channel, ensuring stable water flow and improving measurement accuracy. The inlet end of each straight pipe 150 is connected to the outlet end of the inlet pipe 11, and the outlet end of each straight pipe 150 is connected to the outlet end of the outlet pipe 12. The multiple straight pipes 150 are spaced apart vertically and detachably connected to the inlet pipe 11 and the outlet pipe 12. This vertical spacing allows the detection units 15 to be arranged compactly, saving space and facilitating operation and maintenance. From the inlet pipe 11 to the outlet pipe 12, a first pressure transmitter 152, a first standard gauge 151, a gauge clamp 154, a temperature sensor 155, a second standard gauge 156, and a second pressure transmitter 157 are sequentially installed on the straight pipe 150. The first pressure transmitter 152 and the second pressure transmitter 157 monitor the pressure at the inlet and outlet of the straight pipe 150, respectively, to ensure the stability of the water flow pressure and thus improve measurement accuracy. The first standard gauge 151 and the second standard gauge 156 are used to calibrate the gauge under test 153 to ensure the reliability of the measurement results. The gauge clamp 154 ​​is used to clamp the gauge under test 153. A robotic arm 5 is provided on the side of the gauge clamp 154 ​​to place the gauge under test 153 on the gauge clamp 154. The temperature sensor 155 monitors the water temperature change in the straight pipe 150 in real time, compensating for the influence of temperature on flow measurement and further improving measurement accuracy.

[0048] Reference Figure 1 , Figure 2 and Figure 3The testing mechanism 1 also includes multiple first tee pipes 13 and multiple second tee pipes 14, each corresponding to a multiple straight pipe 150. Each first tee pipe 13 includes a first vertical pipe 131 and a first side pipe 132. The first side pipe 132 is horizontally installed on the side wall of the first vertical pipe 131. In the vertical direction, multiple first vertical pipes 131 are connected in sequence, and the inlet end of the lowest first vertical pipe 131 is connected to the outlet end of the water inlet pipe 11, while the outlet end of the highest first vertical pipe 131 is closed. Each second tee pipe 14 includes a second vertical pipe 141 and a second side pipe 142. The second side pipe 142 is horizontally installed on the side wall of the second vertical pipe 141. In the vertical direction, multiple second vertical pipes 141 are connected in sequence, and the inlet end of the lowest second vertical pipe 141 is connected to the inlet end of the water outlet pipe 12, while the outlet end of the highest second vertical pipe 141 is closed. The inlet end of each straight pipe 150 is connected to the outlet end of the corresponding first side pipe 132, and the outlet end of each straight pipe 150 is connected to the outlet end of the corresponding second side pipe 142.

[0049] Reference Figure 1 , Figure 2 and Figure 3 In this embodiment, the design of the first three-way pipe 13 and the second three-way pipe 14 enables the liquid to be evenly distributed into each detection unit 15, ensuring stable flow rate within each detection unit 15 and improving calibration accuracy. Specifically, the structural design of the first three-way pipe 13 and the first side pipe 132 achieves uniform distribution of liquid from the inlet pipe 11 to each straight pipe 150, avoiding measurement errors caused by uneven flow rate. The structural design of the second three-way pipe 14 and the second side pipe 142 ensures that the liquid flows smoothly from each straight pipe 150 into the outlet pipe 12, reducing fluctuations in the liquid flow process and further improving the accuracy of the calibration results. In the vertical direction, multiple first vertical pipes 131 are connected in sequence, and multiple second vertical pipes 141 are connected in sequence, enabling the testing personnel to connect multiple first tee pipes 13 together and multiple second tee pipes 14 together in the vertical direction according to actual needs. In turn, multiple straight pipes 150 can be connected to the corresponding first tee pipes 13 and the corresponding second tee pipes 14 in the vertical direction, so as to realize the portable assembly and connection of multiple units in the vertical direction, which facilitates the maintenance and replacement of equipment, as well as the setting of different numbers of testing units 15.

[0050] Reference Figure 1 , Figure 2 and Figure 3 The electromagnetic water meter calibration device also includes a first water supply mechanism 2, which includes a first valve 21, a water tank 22, a second valve 23 and a water pump 24. The outlet end of the outlet pipe 12, the first valve 21, the water tank 22, the second valve 23, the water pump 24 and the inlet end of the inlet pipe 11 are connected in sequence.

[0051] Reference Figure 1 , Figure 2 and Figure 3 In this embodiment, the sequential connection of the outlet end of the water pipe 12, the first valve 21, the water tank 22, the second valve 23, the water pump 24, and the inlet end of the water pipe 11 ensures that water can return from the outlet pipe 12 to the inlet pipe 11, forming a closed-loop system that enables cyclical water supply and reduces water waste. The first valve 21 controls the opening and closing of the water flow to prevent backflow and ensure safe system operation. The water tank 22, as a water storage container, can store sufficient water to prevent calibration interruptions due to insufficient water supply. The second valve 23 regulates the water flow rate to ensure a stable water flow into the water pump 24. The water pump 24 is responsible for pumping water from the water tank 22 to the inlet pipe 11, ensuring the continuity and stability of the water flow, thereby making the entire calibration process more efficient and accurate.

[0052] Reference Figure 1 , Figure 2 and Figure 3 A pressure stabilizing tank 25 is connected between the water pump 24 and the inlet end of the water inlet pipe 11, and a third valve 26 is connected between the pressure stabilizing tank 25 and the inlet end of the water inlet pipe 11.

[0053] Reference Figure 1 , Figure 2 and Figure 3 In this embodiment, the pressure stabilizing tank 25 can effectively stabilize the water flow pressure entering the detection mechanism 1, ensuring that the pressure transmitters and standard gauges of each detection unit 15 can operate under constant pressure conditions, thereby improving detection accuracy and reliability. The third valve 26 facilitates the control of the connection and disconnection between the pressure stabilizing tank 25 and the inlet pipe 11, making system debugging and maintenance convenient.

[0054] Reference Figure 1 , Figure 2 and Figure 3 The electromagnetic water meter calibration device also includes a second water delivery mechanism 3, which includes a fourth valve 31, a water tower 32, a fifth valve 33, a piston suction assembly 34, and a sixth valve 35. The liquid outlet end of the water outlet pipe 12, the fourth valve 31, the water tower 32, the fifth valve 33, the piston suction assembly 34, the sixth valve 35, and the liquid inlet end of the water inlet pipe 11 are connected in sequence. The piston suction assembly 34 is used for quantitative water intake and quantitative water discharge.

[0055] Reference Figure 1 , Figure 2 and Figure 3In this embodiment, the outlet end of the water outlet pipe 12, the fourth valve 31, the water tower 32, the fifth valve 33, the piston suction assembly 34, the sixth valve 35, and the inlet end of the water inlet pipe 11 are connected in sequence, ensuring that the water flow can return from the outlet pipe 12 to the inlet pipe 11, forming a closed-loop system to achieve circulating water supply and reduce water waste. The fourth valve 31 controls the water flow into the water tower 32, ensuring sufficient water in the water tower 32. The fifth valve 33 controls the water flow into the piston suction assembly 34, achieving precise water volume control. The piston suction assembly 34 can not only quantitatively absorb water but also quantitatively discharge water, ensuring the stability and accuracy of the water flow. The sixth valve 35 controls the water flow back to the inlet pipe 11, ensuring smooth circulation.

[0056] Reference Figure 1 , Figure 2 and Figure 3 The piston-suction assembly 34 includes a cylinder 340, a connecting pipe 341, and a piston 342. A coaxial reinforcing flange 3401 is provided on the outer wall of the cylinder 340. One end of the cylinder 340 is closed, and the other end is open. One end of the connecting pipe 341 communicates with the closed end of the cylinder 340, and the other end communicates with the liquid outlet of the fifth valve 33 and the liquid inlet of the sixth valve 35. The piston 342 is located inside the open end of the cylinder 340 and is dynamically sealed to the cylinder 340 along its length. A top support 343 is provided at the open end of the cylinder 340. A guide rod 344 and a protective pipe 346 are provided at the end of the piston 342 away from the connecting pipe 341, arranged along the length of the cylinder 340. A coaxial conduit 345 is sleeved on the guide rod 344, and the guide rod 344 and the conduit 345 are slidably connected along the length of the cylinder 340. The conduit 345 is connected to the top support 343. A coaxial nut 347 is provided at the end of the protective tube 346 away from the piston 342, and the nut 347 is connected to the guide tube 345. A screw 348 is provided inside the nut 347. A motor 349 is connected between the end of the screw 348 away from the piston 342 and the top support 343. The motor 349 drives the screw 348 to rotate, thereby causing the nut 347 to move in the length direction of the screw 348, and thus causing the piston 342 to move in the length direction of the cylinder 340.

[0057] Reference Figure 1 , Figure 2 and Figure 3In this embodiment, when water needs to be supplied to the detection unit 15, the fifth valve 33 is opened and the sixth valve 35 is closed. The moving piston 342 draws water from the water tower 32 into the cylinder 340. Then, the fifth valve 33 closes and the sixth valve 35 opens, and the moving piston 342 squeezes the water from the water tower 32 out of the cylinder 340. The water flows sequentially through the sixth valve 35 and the inlet pipe 11, thus quantitatively delivering the water to the detection unit 15. This ensures consistent test conditions each time, improving calibration accuracy and reliability. The connecting pipe 341 serves as both an inlet and outlet, ensuring a smooth water flow path and avoiding flow instability caused by improper pipe connections.

[0058] Reference Figure 1 , Figure 2 and Figure 3 The piston 342 includes a sealing portion 3421 and a conical portion 3422. The sealing portion 3421 is located inside the open end of the cylinder 340 and is dynamically sealed to the cylinder 340 along its length. The conical portion 3422 is located between the sealing portion 3421 and the closed end of the cylinder 340. The maximum outer diameter of the conical portion 3422 is less than and / or equal to the maximum outer diameter of the sealing portion 3421, and the end of the conical portion 3422 with the larger diameter is connected to the sealing portion 3421.

[0059] Reference Figure 1 , Figure 2 and Figure 3 In this embodiment, the maximum outer diameter of the tapered portion 3422 is less than and / or equal to the maximum outer diameter of the sealing portion 3421, so that there is a certain gap between the tapered portion 3422 and the inner wall of the cylinder 340. When the piston 342 reciprocates inside the cylinder 340, air bubbles in the liquid inside the cylinder 340 can accumulate in the gap between the piston 342 and the inner wall of the cylinder 340, so that the air bubbles in the liquid are less likely to affect the accuracy of the liquid volume.

[0060] Reference Figure 1 , Figure 2 and Figure 3 The outlet end of the water pipe 12 is provided with a four-way pipe 4. The first end of the four-way pipe 4 is connected to the outlet end of the water pipe 12, the second end is connected to the inlet end of the first valve 21, the third end is connected to the inlet end of the fourth valve 31, and the fourth end is equipped with a drain valve 41.

[0061] Reference Figure 1 , Figure 2 and Figure 3In this embodiment, the four-way pipe 4 allows the outlet end of the water outlet pipe 12 to be connected to both the first water delivery mechanism 2 and the second water delivery mechanism 3 simultaneously, thereby enabling the selection of two different water delivery methods and improving the system's flexibility and applicability. The drain valve 41 facilitates drainage operations during system maintenance, simplifies the maintenance process, and reduces maintenance time.

[0062] The implementation principle of the electromagnetic water meter calibration device in this application is as follows:

[0063] The robotic arm 5 places the test table 153 at the clamp 154, and the clamp 154 ​​clamps the test table 153.

[0064] When calibrating the rated maximum flow rate, a comparison method is used. The second water supply mechanism 3 is closed, and the first water supply mechanism 2 is operated. An appropriate amount of water is injected into the water tank 22, and the first valve 21, the second valve 23, and the third valve 26 are all opened. The water pump 24 draws water from the water tank 22 to the detection unit 15. The water in the water tank 22 flows through the second valve 23, the water pump 24, the pressure stabilizing tank 25, the third valve 26, the inlet pipe 11, the first tee pipe 13, the detection unit 15, the second tee pipe 14, the outlet pipe 12, and the first valve 21 in sequence, and then flows back into the water tank 22, forming a circulation system. As water flows through the detection unit 15, the first pressure transmitter 152 and the second pressure transmitter 157 monitor the water pressure at both ends of the straight pipe 150 in real time. Based on the water pressure data, the testing personnel adjust the power of the water pump 24 in real time, thereby adjusting the water volume and pressure that the pump 24 can deliver to ensure the stability of the water pressure inside the straight pipe 150 and to facilitate precise adjustment of the water pressure inside the straight pipe 150. The temperature sensor 155 monitors the water temperature inside the straight pipe 150 in real time. By comparing the measurement data of the meter under test with those of the first standard meter 151 and the second standard meter 156, the difference between the meter under test and these standards is determined. The smaller the difference, the more accurate the measurement by the meter under test.

[0065] When calibrating the rated minimum flow rate, the equal volume method is used. The first water delivery mechanism 2 is closed, and the second water delivery mechanism 3 is operated. An appropriate amount of water is injected into the water tower 32. The fifth valve 33 is opened, and the sixth valve 35 is closed. The moving piston 342 draws water from the water tower 32 into the cylinder 340. Then, the fifth valve 33 is closed, and the sixth valve 35 is opened. The moving piston 342 expels water from the water tower 32 into the cylinder 340. The water flows sequentially through the sixth valve 35 and the inlet pipe 11, thus quantitatively delivering the water to the detection unit 15. During operation, the piston suction assembly 34 drives the screw 348 to rotate at a constant speed via the motor 349, causing the nut 347 to move at a constant speed along the length of the screw 348, which in turn causes the piston 342 to move at a constant speed along the length of the cylinder 340. This quantitatively and uniformly delivers the water to the detection unit 15. After passing through the detection unit 15, the water flows back into the water tower 32 via the sixth valve 35, forming a circulation system. As water flows through the detection unit 15, the first pressure transmitter 152 and the second pressure transmitter 157 monitor the water pressure at both ends of the straight pipe 150 in real time. Based on the water pressure data, the testing personnel adjust the power of the water pump 24 in real time, thereby adjusting the water volume and pressure that the water pump 24 can deliver to ensure the stability of the water pressure inside the straight pipe 150 and to facilitate precise adjustment of the water pressure inside the straight pipe 150. The temperature sensor 155 monitors the water temperature inside the straight pipe 150 in real time. When testing the gauge under test, the pushing distance of the container piston 342 is calibrated, and the data of the gauge under test, the first standard gauge 151, and the second standard gauge 156 under the same volumetric flow rate are calculated. Then, the measurement data of the gauge under test are compared with those of the first and second standard gauges 151 and 156 to determine the difference between them. The smaller the difference, the more accurate the measurement of the gauge under test.

[0066] Unless otherwise defined, the technical or scientific terms used in this application shall have the ordinary meaning understood by one of ordinary skill in the art to which this application pertains. The terms "first," "second," "third," and similar terms used in this application specification and claims do not indicate any order, quantity, or importance, but are merely used to distinguish different components. The terms "an" or "a" and similar terms do not indicate a quantity limitation, but rather indicate the presence of at least one. The terms "comprising" or "including" and similar terms mean that the elements or objects preceding "comprising" or "including" encompass the elements or objects listed following "comprising" or "including" and their equivalents, and do not exclude other elements or objects. "Above," "below," "left," "right," etc., are used only to indicate relative positional relationships; when the absolute position of the described object changes, the relative positional relationship may also change accordingly.

[0067] The above are all optional embodiments of this application and are not intended to limit the scope of protection of this application. Therefore, all equivalent changes made in accordance with the structure, shape and principle of this application should be covered within the scope of protection of this application.

Claims

1. An electromagnetic water meter calibration device, characterized in that: The device includes a detection mechanism (1), which includes an inlet pipe (11), an outlet pipe (12), and multiple detection units (15). Each detection unit (15) includes a straight pipe (150), a first pressure transmitter (152), a first standard gauge (151), a clamp gauge (154), a temperature sensor (155), a second standard gauge (156), and a second pressure transmitter (157). The inlet end of each straight pipe (150) is connected to the outlet end of the inlet pipe (11), and the outlet end of each straight pipe (150) is connected to the outlet end of the outlet pipe (12). From the inlet pipe (11) to the outlet pipe (12), the first pressure transmitter (152), the first standard gauge (151), the gauge clamp (154), the temperature sensor (155), the second standard gauge (156) and the second pressure transmitter (157) are sequentially installed on the straight pipe (150), and the gauge clamp (154) is used to clamp the gauge under test (153).

2. The electromagnetic water meter calibration device according to claim 1, characterized in that: Multiple straight pipes (150) are spaced apart in the vertical direction and are detachably connected to the inlet pipe (11) and the outlet pipe (12).

3. The electromagnetic water meter calibration device according to claim 2, characterized in that: The testing mechanism (1) further includes a plurality of first tee tubes (13) and a plurality of second tee tubes (14), wherein the plurality of first tee tubes (13) and the plurality of second tee tubes (14) are respectively arranged corresponding to the plurality of straight tubes (150); Each of the first three-way pipes (13) includes a first vertical pipe (131) and a first side pipe (132). The first side pipe (132) is horizontally installed on the side wall of the first vertical pipe (131). In the vertical direction, multiple first vertical pipes (131) are connected in sequence, and the liquid inlet end of the lowest first vertical pipe (131) is connected to the liquid outlet end of the water inlet pipe (11), while the liquid outlet end of the highest first vertical pipe (131) is closed. Each of the second three-way pipes (14) includes a second vertical pipe (141) and a second side pipe (142). The second side pipe (142) is horizontally installed on the side wall of the second vertical pipe (141). In the vertical direction, multiple second vertical pipes (141) are connected in sequence, and the liquid inlet end of the lowest second vertical pipe (141) is connected to the liquid inlet end of the water outlet pipe (12), while the liquid outlet end of the highest second vertical pipe (141) is closed. The inlet end of each straight tube (150) is connected to the outlet end of the corresponding first side tube (132), and the outlet end of each straight tube (150) is connected to the outlet end of the corresponding second side tube (142).

4. The electromagnetic water meter calibration device according to claim 3, characterized in that: The electromagnetic water meter calibration device also includes a first water delivery mechanism (2), which includes a first valve (21), a water tank (22), a second valve (23), and a water pump (24). The outlet end of the water outlet pipe (12), the first valve (21), the water tank (22), the second valve (23), the water pump (24), and the inlet end of the water inlet pipe (11) are connected in sequence.

5. The electromagnetic water meter calibration device according to claim 4, characterized in that: A pressure stabilizing tank (25) is connected between the water pump (24) and the inlet end of the water inlet pipe (11), and a third valve (26) is connected between the pressure stabilizing tank (25) and the inlet end of the water inlet pipe (11).

6. The electromagnetic water meter calibration device according to claim 5, characterized in that: The electromagnetic water meter calibration device also includes a second water delivery mechanism (3), which includes a fourth valve (31), a water tower (32), a fifth valve (33), a piston water suction assembly (34), and a sixth valve (35). The outlet end of the water outlet pipe (12), the fourth valve (31), the water tower (32), the fifth valve (33), the piston water suction assembly (34), the sixth valve (35), and the inlet end of the water inlet pipe (11) are connected in sequence. The piston water suction assembly (34) is used for quantitative water suction and quantitative water discharge.

7. The electromagnetic water meter calibration device according to claim 6, characterized in that: The piston water suction assembly (34) includes a cylinder (340), a connecting pipe (341) and a piston (342). One end of the cylinder (340) is closed and the other end is open. One end of the connecting pipe (341) is connected to the closed end of the cylinder (340) and the other end is connected to the liquid outlet of the fifth valve (33) and the liquid inlet of the sixth valve (35). The piston (342) is located inside the open end of the cylinder (340) and is dynamically sealed to the cylinder (340) along the length direction of the cylinder (340).

8. The electromagnetic water meter calibration device according to claim 7, characterized in that: The piston (342) includes a sealing part (3421) and a conical part (3422). The sealing part (3421) is located inside the open end of the cylinder (340) and is dynamically sealed to the cylinder (340) in the length direction of the cylinder (340). The tapered portion (3422) is disposed between the sealing portion (3421) and the closed end of the cylinder (340). The maximum outer diameter of the tapered portion (3422) is less than and / or equal to the maximum outer diameter of the sealing portion (3421), and the end of the tapered portion (3422) with the larger diameter is connected to the sealing portion (3421).

9. The electromagnetic water meter calibration device according to claim 8, characterized in that: The outlet end of the water pipe (12) is provided with a four-way pipe (4). The first end of the four-way pipe (4) is connected to the outlet end of the water pipe (12), the second end is connected to the inlet end of the first valve (21), the third end is connected to the inlet end of the fourth valve (31), and the fourth end is equipped with a drain valve (41).

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