Multi-meter-position water meter calibrating device

Abstract

The invention relates to a multi-meter-position water meter calibrating device, and relates to the field of metering instrument calibration, the multi-meter-position water meter calibrating device comprises a waterway circulation module, a water meter clamping module, a sealed calibration module, a flow detection module and a water quantity metering module, the waterway circulation module can drive calibration water to circularly flow in a circulation pipeline, and the water meter clamping module comprises a plurality of meter positions to be calibrated; the plurality of meter positions to be detected are arranged on the circulating pipeline in series, the sealed detection module is connected with the water meter clamping module, the flow detection module and the water quantity metering module are respectively arranged on the circulating pipeline, the flow detection module comprises a plurality of flow meters, scale grids of the plurality of flow meters are different, one of the plurality of flow meters is selected to be connected on the circulating pipeline, and the water quantity metering module is connected with the water meter clamping module. The water quantity metering module comprises a plurality of water quantity meters, the scale grids of the water quantity meters are different, one of the water quantity meters is selected to be connected to the circulating pipeline, and the water meter verification accuracy and verification efficiency can be improved.

Description

Technical Field

[0001] The present application relates to the field of measuring instrument calibration, and in particular to a multi-position water meter calibration device. Background Art

[0002] A water meter is an instrument used to measure, record, and display water flow. The meter's results form the basis for settlements between water companies and users. To ensure the accuracy of water meter measurements, the government has included water meters in the list of mandatory measuring instruments, requiring them to undergo verification within statutory deadlines to safeguard the legitimate rights and interests of both water suppliers and users.

[0003] Water meter calibration primarily covers appearance, markings and seals, electronic device functionality, sealing, and indication error. Among these, indication error calibration is the most labor-intensive and time-consuming. Water meter calibration primarily utilizes the comparison method, comparing the meter's cumulative flow reading with the measurement results of a standard device to determine the meter's indication error. According to the "Verification Regulations for Drinking Cold Water Meters" (JJG 162-2019), water meter calibration methods include the start-stop method, the reversal method, and the flow-time method. During water meter calibration, the indication error is tested at three flow points: the normal flow rate Q3, the boundary flow rate Q2, and the minimum flow rate Q1. The meter's indication error is considered acceptable only if the indication error at all three flow points is less than the specified maximum allowable error. Water meters can be individually mounted on a calibration device for calibration, or multiple water meters of the same model and specification can be installed in series for simultaneous calibration.

[0004] Existing water meter calibration devices typically use the same measurement standard device to test the standard flow rate of a water meter at different flow points. However, a water meter's common flow rate, Q3, is often tens to hundreds of times greater than its minimum flow rate, Q1. Flow rates vary significantly between different models and specifications, making it difficult for a single measurement standard device to meet the calibration requirements of different water meters. Existing multi-meter calibration devices typically require a separate meter clamp at each meter location to be tested, requiring each meter to be individually clamped, resulting in poor meter installation efficiency. Summary of the Invention

[0005] In order to improve the accuracy and efficiency of water meter calibration, the present application provides a multi-position water meter calibration device.

[0006] The multi-meter water meter calibration device provided in this application adopts the following technical solutions: A multi-meter-position water meter calibration device includes a water circulation module, a water meter clamping module, a sealing calibration module, a flow detection module and a water metering module. The water circulation module can drive the calibration water to circulate in the circulation pipeline. The water meter clamping module includes multiple meters to be inspected, and the multiple meters to be inspected are arranged in series on the circulation pipeline. The sealing calibration module is connected to the water meter clamping module. The flow detection module and the water metering module are respectively arranged on the circulation pipeline. The flow detection module includes multiple flow meters, and the scale grids of the multiple flow meters are different, and one of them is connected to the circulation pipeline. The water metering module includes multiple water meters, and the scale grids of the multiple water meters are different, and one of them is connected to the circulation pipeline.

[0007] By adopting the above technical solution, by selectively connecting multiple flow meters and multiple water meters to the circulation pipeline, it is possible to use flow meters and water meters with different scale divisions to perform flow and water volume detection when performing indication error calibration on water meters of different models and specifications and at different flow points of water meters, thereby ensuring the accuracy of water indication error calibration under different flow conditions.

[0008] In a specific feasible implementation scheme, the flow detection module also includes a water diversion pipeline, a flow regulating valve, a branch switch valve and a converging pipeline. The water diversion pipeline includes a water diversion inlet pipe and multiple water diversion outlet pipes that are interconnected. The water diversion inlet pipe is connected to the water meter clamping module. The converging pipeline includes a converging connecting pipe and multiple branch connecting pipes that are interconnected. The converging connecting pipe is connected to the water metering module. There are multiple flow regulating valves and branch switch valves. Each flow regulating valve is interconnected with a branch switch valve and a flow meter to form a flow detection branch. Each flow detection branch is connected between a water diversion outlet pipe and a corresponding branch connecting pipe.

[0009] By adopting the above technical solution, the branch switch valve set on each flow detection branch can be used to control the on and off of each flow detection branch separately, so that only one of the multiple connection detection branches is open, and the flow detection is performed using a flow meter with appropriate scale divisions; the flow regulating valve set on each flow detection branch can be used to accurately adjust the flow during water meter calibration to ensure that the flow of water meter calibration meets the flow point requirements specified in the calibration standard.

[0010] In a specific feasible implementation scheme, the nominal diameters of the water outlet pipe, flow regulating valve, branch switch valve, flow meter and branch connecting pipe on each flow detection branch are the same, and the nominal diameters of the flow meters on different flow detection branches are in multiples.

[0011] By adopting the above technical solution, using the water outlet pipe, flow regulating valve, branch switch valve, flow meter and branch connecting pipe with the same nominal diameter on each flow detection branch, the stability of the water flow in each flow detection branch can be guaranteed, and the water flow rate can be adapted to the metering range of the flow meter; by using flow meters with nominal diameters that are multiples of each other on different flow detection branches, the difference between the scale grids of different flow meters can be formed, so that the detection results of the flow detection module under different flow conditions have a high relative accuracy.

[0012] In a specific feasible implementation scheme, the water metering module also includes a plurality of metering switch valves and a plurality of diverters, each of the metering switch valves is connected between the upstream end of the circulation pipeline and one of the diverters, the diverter includes a diverter frame, a water inlet pipe interface, a bellows, a rotating connector, a diverter pipe, a diverter cylinder and a double-chamber water receiver, the water inlet pipe interface is arranged on the upper part of the diverter frame, and is respectively connected to one of the metering switch valves, the bellows is connected between the water inlet pipe interface and the rotating connector, the rotating connector is rotatably connected to the diverter frame, the diverter pipe is connected to the rotating connector, and the double-chamber water receiver is arranged It is located below the commutator frame, and includes a first water receiving chamber, a second water receiving chamber, a first water outlet pipe and a second water outlet pipe. The first water receiving chamber and the second water receiving chamber are arranged in parallel, and the first water outlet pipe and the second water outlet pipe are respectively arranged at the bottom of the first water receiving chamber and the second water receiving chamber. The reversing cylinder is arranged on the commutator frame and is connected to the reversing pipe so as to drive the outlet of the reversing pipe to switch above the first water receiving chamber and the second water receiving chamber. The first water outlet pipe is connected to one of the water meters, and the second water outlet pipe is connected to the downstream end of the circulation pipeline. Each of the water meters is connected to the downstream end of the circulation pipeline.

[0013] By adopting the above technical solution and utilizing multiple metering switch valves corresponding to different water meters, the water in the circulation pipeline can flow into different water meters for metering, so that the scale divisions of the water meter for detection are adapted to the water flow in the circulation pipeline, ensuring that the water metering module can obtain higher relative detection accuracy under different flow conditions; by utilizing a rotating connector rotatably connected to the diverter frame, the reversing tube connected to the rotating connector can be driven to reverse by a reversing cylinder, so that the outlet of the reversing tube is switched above the first water receiving chamber and the second water receiving chamber, thereby determining whether the circulating water flow enters the water meter for detecting the water volume.

[0014] In a specific feasible implementation scheme, the water meter is a weighing meter, the water metering module also includes a temperature sensor, the temperature sensor is arranged on the circulation pipeline adjacent to the metering switch valve, the water meter includes a weighing container and an electronic scale, the weighing container is arranged on the electronic scale, the first water outlet pipe of each of the diverters is located above a weighing container, a wave-breaking baffle is provided inside the weighing container, a drain pipe is provided at the bottom of the weighing container, the drain pipe is connected to the downstream end of the circulation pipeline, and a drain valve is provided on the drain pipe.

[0015] By adopting the above technical solution, using an electronic scale arranged below the weighing container and a temperature sensor arranged on the circulation pipeline, the weight and temperature of the water passing through the water meter within a set time can be obtained respectively, thereby accurately obtaining the volume flow rate of water flowing through the water meter; using a wave-proof baffle arranged inside the weighing container, the water flowing into the weighing container through the commutator outlet pipe can be separated and blocked, thereby reducing the fluctuation of the water in the weighing container and improving the accuracy of the weighing results of the electronic scale.

[0016] In a specific feasible implementation scheme, the water meter clamping module includes a water inlet valve, a water meter clamp, a first end connecting pipe, an intermediate connecting pipe, a second end connecting pipe and a water outlet valve, the water inlet valve and the water outlet valve are respectively connected to the upstream and downstream ends of the circulation pipeline, the water meter clamp, the first end connecting pipe, the intermediate connecting pipe and the second end connecting pipe are coaxially arranged in sequence and can move in the axial direction, the water meter clamp includes two interconnected connecting ports, one of the connecting ports is connected to the water inlet valve and can change the distance between the two connecting ports, there are at least two intermediate connecting pipes, and the meter position to be inspected can be formed between the intermediate connecting pipe and the first end connecting pipe, between the intermediate connecting pipes, and between the intermediate connecting pipe and the second end connecting pipe.

[0017] By adopting the above technical solution, multiple meter positions to be inspected formed between the first end connecting pipe, the second end connecting pipe and the middle connecting pipe can be used to simultaneously clamp and connect multiple water meters to be inspected, and calibrate multiple water meters at the same time, thereby improving the calibration efficiency of the water meters; by using the water meter clamp arranged between the water inlet valve and the first end connecting pipe, the first end connecting pipe and the middle connecting pipe and the second end connecting pipe opposite thereto can be pushed to move by increasing the distance between the two connection ports, thereby pressing the water meter on the meter position to be inspected and sealing the water meter to the circulation pipeline.

[0018] In a specific feasible implementation plan, the water meter clamping module also includes a calibration platform, which is provided with a connecting pipe slide rail, and the first end connecting pipe, the middle connecting pipe and the second end connecting pipe are all slidably installed on the connecting pipe slide rail, and the two ends of the middle connecting pipe and one end of the first end connecting pipe and the second end connecting pipe are provided with a water meter connection structure, and the water meter connection structure includes a water meter clamping joint, a flange positioning plate, a flange support and a flange hole positioning column, and the water meter clamping joint is arranged at the end of the first end connecting pipe, the middle connecting pipe or the second end connecting pipe, so as to be able to clamp the inlet and outlet of the water meter to be inspected to form a sealed connection, the flange positioning plate is arranged below the water meter clamping joint, the flange support is arranged at the edge part of the flange positioning plate, and the flange hole positioning column is installed on the flange positioning plate, and the other end of the first end connecting pipe and the second end connecting pipe is provided with a clamping connection structure, and can be sealed and connected to the water meter clamp and the water outlet valve respectively through the clamping leveling structure.

[0019] By adopting the above technical solution, the first end connecting tube, the middle connecting tube and the second end connecting tube are slidably installed on the connecting tube slide rail, which can facilitate the axial movement of the first end connecting tube, the middle connecting tube and the second end connecting tube, and ensure coaxiality with each other during the movement; the flange support provided on the edge part of the flange positioning plate can support the water meter to be inspected in a position coaxial with the middle connecting tube and the end connecting tube, so as to facilitate the formation of a coaxial sealed connection with the water meter through the movement of the middle connecting tube and / or the end connecting tube; the flange hole positioning column provided on the flange positioning plate can be inserted into the connecting hole on the water meter flange to ensure the position stability of the water meter on the flange support.

[0020] In a specific feasible implementation scheme, the water meter clamp includes a clamping cylinder, a flange sleeve, a telescopic clamping tube and a clamping tube piston. The clamping cylinder is fixed on the calibration platform. The flange sleeve is fixed at one end of the clamping cylinder, and one end is connected to the water inlet valve, and the other end is located inside the clamping cylinder. The telescopic clamping tube is sleeved on the flange sleeve and can slide on the flange sleeve. One end of the telescopic clamping tube extends out of the clamping cylinder, and a clamping connection structure is provided at the end. The clamping tube piston is provided at the other end of the telescopic clamping tube. A sliding sealing structure is provided between the telescopic clamping tube, the clamping cylinder and the flange sleeve.

[0021] By adopting the above technical solution, a telescopic compression tube that is slidably sleeved on the flange sleeve and slidably connected to the compression cylinder can be used to change the distance between the compression connection structure and the flange sleeve while maintaining the sealing of the connecting pipe. The telescopic compression tube is used to push the first end connecting tube, the middle connecting tube and the second end connecting tube to form a compression seal for the water meter at the meter position to be inspected, and multiple water meters can be clamped by a water meter clamp.

[0022] In a specific feasible implementation scheme, the sealing verification module includes a driving cylinder, a pressure water cylinder and a pressurizing piston. The pressurizing piston is slidably arranged in the pressure water cylinder and can slide in the pressure water cylinder under the push of the driving cylinder. The pressure water cylinder is connected to the water meter clamping module; the water circulation module includes a water reservoir, a circulating water pump, a water quality filter and a water source pressure stabilizing tank. The water inlet of the circulating water pump is connected to the water reservoir, and the water outlet is connected to the water source pressure stabilizing tank. The water quality filter is arranged between the water outlet of the circulating water pump and the water reservoir. The water source pressure stabilizing tank is connected to the water meter clamping module, the flow detection module and the water metering module through a water supply pipe, and is connected to the water reservoir to form the circulation pipeline.

[0023] By adopting the above technical solution, a pressure water cylinder with a pressurizing piston inside and connected to the water meter clamping module can be used to form a higher water pressure in the pressure water cylinder under the drive of the driving cylinder, and transmit it to the water meter clamping module to perform a sealing test on the water meter clamped in the water meter clamping module; by using a water source pressure-stabilizing tank arranged between the water outlet of the circulating water pump and the water meter clamping module, a buffer can be formed for the output pressure of the circulating water pump, reducing the change in the output pressure of the circulating water pump caused by the opening and closing of the switch valve on the circulating pipeline, thereby ensuring the stability of the pressure at the output end of the circulating water pump.

[0024] In a specific possible implementation scheme, the multi-meter water meter calibration device of the present application also includes a water value identification device, and there are multiple water value identification devices, which are arranged in a one-to-one correspondence with the multiple meters to be inspected.

[0025] By adopting the above technical solution and utilizing multiple water indication value identification devices corresponding one to one with the meter positions to be inspected, the indication of the mechanical water meter can be automatically identified, the mechanical water indication value can be automatically read, and the degree of automation of the water meter calibration device can be improved.

[0026] In summary, this application includes at least one of the following beneficial technical effects: By providing a plurality of flow meters with different scale divisions and a plurality of water quantity meters with different scale divisions, which are selectively connected to the circulating water path, it is possible to select flow meters with different scale divisions and water quantity meters with different scale divisions to detect water flow and water quantity at different flow points of water meter calibration and / or when calibrating water meters of different models and specifications, thereby improving the detection accuracy of the flow meters and water quantity meters under different flow conditions and improving the accuracy of water meter calibration results; By setting a weighing container on an electronic scale as a water meter, and installing a temperature sensor on the adjacent circulation pipeline and a wave-proof baffle in the weighing container, the weight of the water collected by the weighing container within a set time period can be accurately obtained, and the volume of the collected water can be obtained by the density of water at the current temperature, thereby obtaining an accurate standard flow rate; By slidingly arranging the first end connecting tube, the plurality of intermediate connecting tubes, and the second end connecting tube on the connecting tube slide rail on the calibration platform, it is possible to ensure that the first end connecting tube, the intermediate connecting tube, and the second end connecting tube move axially in a coaxial state, which is conducive to forming a coaxial connection state with multiple water meters, and can push the multiple end connecting tubes and the intermediate connecting tubes to move by a water meter clamp, thereby clamping and connecting multiple water meters at the same time; The water meter clamp composed of a compression cylinder, a flange sleeve, a telescopic compression tube and a compression tube piston can make the telescopic compression tube slide in the flange sleeve driven by the pressurized gas in the compression cylinder, thereby forming a larger range of telescopic movement while maintaining the sealing of the calibration water channel, thereby ensuring the connection effect of the water meter at the meter position to be inspected. BRIEF DESCRIPTION OF THE DRAWINGS

[0027] Figure 1 This is a schematic diagram of an embodiment of the present application.

[0028] Figure 2 This is a schematic diagram of a flow detection module in one embodiment of the present application.

[0029] Figure 3 This is a schematic diagram of a water metering module in one embodiment of the present application.

[0030] Figure 4 This is a schematic diagram of a water meter in one embodiment of the present application.

[0031] Figure 5 This is a partial schematic diagram of a water meter clamping module in one embodiment of the present application.

[0032] Figure 6 This is a schematic diagram of the intermediate connecting pipe in one embodiment of the present application.

[0033] Figure 7 This is a schematic diagram of the end connection pipe in one embodiment of the present application.

[0034] Figure 8 This is a partial schematic diagram of a water meter clamp in one embodiment of the present application.

[0035] Figure 9 This is a schematic transverse cross-sectional view of a water meter clamp in one embodiment of the present application.

[0036] Figure 10 This is a partial schematic diagram of the sealing verification module in one embodiment of the present application.

[0037] Figure 11 This is a schematic diagram of a water circulation module (part) in one embodiment of the present application.

[0038] Explanation of the accompanying symbols: 1. Water circulation module; 11. Water reservoir; 12. Circulating water pump; 13. Water quality filter; 14. Water source pressure regulating tank; 15. Water supply pipeline; 2. Water meter clamping module; 21. Water inlet valve; 22. Water meter clamp; 221. Compression cylinder; 2211. Air source interface; 222. Flange sleeve; 223. Telescopic compression pipe; 224. Compression pipe piston; 225. Compression sleeve structure; 23. First end connecting pipe ; 231, compression connection structure; 24, intermediate connecting pipe; 241, water meter compression joint; 242, flange positioning plate; 243, flange support; 244, flange hole positioning column; 25, second end connecting pipe; 26, water outlet valve; 27, calibration table; 271, connecting pipe slide rail; 272, water receiving trough; 273, identification device bracket; 28, sliding support; 3, sealing calibration module; 31, driving cylinder; 32, pressure water cylinder; 33, Pressurizing piston; 4. Flow detection module; 41. Flow meter; 42. Water distribution pipeline; 421. Water distribution inlet pipe; 422. Water distribution outlet pipe; 43. Flow regulating valve; 44. Branch switch valve; 45. Converging pipeline; 451. Converging connecting pipe; 452. Branch connecting pipe; 5. Water metering module; 51. Water meter; 511. Weighing container; 512. Electronic scale; 513. Wave baffle; 514. Drain pipe; 515. Drain Water valve; 52. Metering switch valve; 53. Reverser; 531. Reverser frame; 532. Water inlet pipe interface; 533. Bellows; 534. Rotating connector; 535. Reversing pipe; 536. Reversing cylinder; 537. Double-chamber water receiver; 5371. First water receiving chamber; 5372. Second water receiving chamber; 5373. First water outlet pipe; 5374. Second water outlet pipe; 54. Temperature sensor; 6. Water indication value identification device; 7. Water meter. DETAILED DESCRIPTION

[0039] The specific embodiments of the present application are described in detail below with reference to the accompanying drawings. It should be understood that the specific embodiments described herein are only used to illustrate and explain the present application and are not intended to limit the present application.

[0040] In this application, unless otherwise indicated, the directions or positional relationships indicated by directional terms such as "upstream" and "downstream" are based on the directions or positional relationships of the calibration water flow during actual use of the multi-meter water meter calibration device of this application. The description of the directions or positional relationships of the multi-meter water meter calibration device and its components in this application is consistent with the installation orientation in actual use.

[0041] In the description of this application, it should be noted that, unless otherwise expressly specified or limited, the terms "disposed" and "connected" should be understood in a broad sense. For example, they can refer to fixed connections, detachable connections, or integral connections; they can refer to direct connections or indirect connections through an intermediate medium; they can refer to internal communication between two components or the interaction between two components. Those skilled in the art will understand the specific meanings of the above terms in this application based on the specific circumstances.

[0042] In this specification, the terms "first" and "second" are used for descriptive purposes only and should not be understood as indicating or suggesting relative importance or implicitly indicating the number of technical features indicated. Therefore, the features defined as "first" and "second" may explicitly or implicitly include one or more of the said features.

[0043] An embodiment of the multi-meter water meter calibration device of the present application is as follows: Figures 1 to 11 As shown, it includes a water circulation module 1, a water meter clamping module 2, a seal verification module 3, a flow detection module 4, and a water metering module 5. The water circulation module 1 is used to drive the verification water to circulate in the circulation pipeline connecting the water meter clamping module 2, the seal verification module 3, the flow detection module 4, and the water metering module 5.

[0044] The water meter clamping module 2 is provided with a plurality of test locations. The plurality of test locations are connected in series to the circulation pipeline. A water meter to be tested can be clamped and fixed at each test location. Thus, multiple water meters of the same model and specification can be clamped and fixed using the plurality of test locations. Multiple water meters of the same model and specification can be calibrated simultaneously, thereby improving the calibration efficiency of water meters. Of course, the number of water meters to be clamped simultaneously on the water meter clamping module 2 can also be less than the number of test locations. In this case, a straight water pipe can be clamped at some of the test locations so that the test water flows through the straight water pipe in the circulation pipeline to prevent leakage during the flow of water.

[0045] Switch valves are provided at both ends of the water meter clamping module 2. The sealing verification module 3 is connected to the water meter clamping module 2. When the switch valves at both ends are closed, the test water in the water meter clamping module 2 can be pressurized to verify the sealing of the water meter under the set pressure.

[0046] The flow detection module 4 is set on the circulation pipeline to detect the flow of the calibration water, so that the water value error can be verified using the flow time method. When calibrating a water meter, the national metrological verification regulations require that the meter measurement error be verified at the common flow rate Q3, the boundary flow rate Q2 and the minimum flow rate Q1 respectively. The common flow rate Q3 and the minimum flow rate Q1 of the water meter are usually very different. For example, a common Q3 = 2.5m 3 / h water meter, its Q3 / Q1=200, that is, Q1=0.0125m 3 / h. The existing water meter calibration device only uses one flow meter to detect the water flow rate. In order to be able to calibrate the water meter at the common flow rate Q3, at least a flow meter with a range of 3m is required. 3 / h flowmeter. The larger the flowmeter range, the larger the scale division indicating the actual flow value. Therefore, when using this flowmeter to detect the measurement error of the water meter in the minimum flow Q1 state, 0.0125m 3 The flow rate of / h is difficult to be accurately indicated by the scale grid of the flow meter, which affects the accuracy of the water meter calibration results.

[0047] The flow detection module 4 of the multi-meter water meter calibration device of the present application is provided with a plurality of flow meters 41 with different scale divisions, and the flow meter 41 usually uses an instantaneous flow meter. When calibrating water meters of different models and specifications, and when calibrating water meters at different flow points among the commonly used flow rate Q3, the boundary flow rate Q2 and the minimum flow rate Q1, any flow meter 41 with a corresponding scale division can be connected to the circulation pipeline according to the different calibration water flow rates, and the flow meters with different scale divisions can be used to detect the calibration water flow rates with different flow requirements, so that high-precision detection results can be obtained for water used for calibration of different flow rates, and the accuracy of the standard measurement results of the water meter at different flow points can be better guaranteed, thereby improving the accuracy of the water meter calibration results.

[0048] The water metering module 5 is arranged on the circulation pipeline and is used to detect the water consumption for calibration, so that the start-stop method or the reversing method can be used to calibrate the water indication error. A plurality of water meters 51 are arranged in the water metering module 5. The water meter 51 can be any suitable metering device for measuring the water consumption within the set time, such as a capacity detection device, a quality detection device, etc. The scale divisions of the plurality of water meters 51 in the water metering module 5 are different. When calibrating water meters of different models and specifications, and when calibrating water meters at different flow points among the common flow rate Q3, the boundary flow rate Q2 and the minimum flow rate Q1, the amount of water required for calibration is also different. The amount of water used for calibration is usually determined according to the scale division of the water meter or the calibration signal resolution, as well as the calibration flow. According to the different calibration water consumption, any water meter 51 with a suitable scale division can be connected to the circulation pipeline, and the calibration water consumption can be detected using water meters 51 with different scale divisions. When different water volumes of calibration water are used to calibrate the water indication value error, higher detection accuracy can be achieved, thereby better ensuring the accuracy of the water meter calibration results.

[0049] In some embodiments of the multi-position water meter calibration device of the present application, such as Figure 2 As shown, the flow detection module 4 includes a flow meter 41, a water distribution pipeline 42, a flow regulating valve 43, a branch switch valve 44, and a converging pipeline 45. The water distribution pipeline 42 is provided with a water distribution inlet pipe 421 and multiple water distribution outlet pipes 422 connected to the water distribution inlet pipe 421. The water distribution inlet pipe 421 is connected to the water meter clamping module 2, so that the calibration water from the water meter clamping module 2 can flow into different water distribution outlet pipes 422.

[0050] The converging pipeline 45 is provided with a converging connecting pipe 451 and a plurality of branch connecting pipes 452 connected to the converging connecting pipe 451. The converging connecting pipe 451 is connected to the water metering module 5 and can collect calibration water through different branch connecting pipes 452, and transport the calibration water to the water metering module 5 to detect the calibration water volume.

[0051] Multiple flow control valves 43 and branch switch valves 44 are provided. The specific number is the same as the number of flow meters 41, water outlet pipes 422, and branch connection pipes 452, for example, three are provided. Each flow control valve 43 is interconnected with a branch switch valve 44 and a flow meter 41 to form a flow detection branch. Each flow detection branch is connected between a water outlet pipe 422 and a corresponding branch connection pipe 452.

[0052] The flow rate regulating valve 43 in each flow detection branch can be used to adjust the flow rate of the calibration water flowing in the flow detection branch so that the flow rate meets the flow rate requirements of a flow point of the water meter. The branch switch valve 44 in each flow detection branch can be used to control the on and off of each flow detection branch, so that only one of the multiple flow detection branches is connected, and the scale grid of the flow meter 41 in the connected flow detection branch is adapted to the flow rate of the flow point.

[0053] In a preferred embodiment of the multi-meter calibration device of the present application, the nominal diameters of the water outlet pipe 422, the flow regulating valve 43, the branch switch valve 44, the flow meter 41 and the branch connecting pipe 452 on each flow detection branch are the same, and are interconnected using matching connecting pipes, so that the flow rate of the calibration water in the water outlet pipe 422, the flow regulating valve 43, the branch switch valve 44, the flow meter 41 and the branch connecting pipe 452 is the same, thereby ensuring the stability of the water flow in the flow detection branch.

[0054] The nominal diameters of the water outlet pipe 422, the flow regulating valve 43, the branch switch valve 44, the flow meter 41 and the branch connecting pipe 452 on different flow detection branches are in a multiple relationship. For example, the nominal diameters of the water outlet pipe 422, the flow regulating valve 43, the branch switch valve 44, the flow meter 41 and the branch connecting pipe 452 on the three flow detection branches are in a relationship of 1:3:9. In this way, the flow rates of the three flow detection branches at the same flow rate can be in a relationship of 1:9:91, and the scale divisions of the flow meter 41 in the three flow detection branches are also adapted to the corresponding flow rates, forming differences in the scale divisions of the corresponding flow meter 41, ensuring that higher flow detection accuracy can be obtained for flow states with greater differences.

[0055] In some embodiments of the multi-position water meter calibration device of the present application, such as Figure 3 As shown, the water metering module 5 includes a water meter 51, a metering on-off valve 52, and a diverter 53. Multiple water meter 51, metering on-off valve 52, and diverter 53 are provided, and the number of water meter 51, metering on-off valve 52, and diverter 53 is the same, for example, two are provided. The scale divisions of each water meter 51 are different, typically differing by about an order of magnitude. The nominal diameters of each metering on-off valve 52 and diverter 53 are also different, and their nominal diameters are adapted to the scale divisions of the corresponding water meter 51.

[0056] Each diverter 53 is connected to the water supply pipe 15 upstream of the circulation pipeline via a connecting pipe. Each connecting pipe between the diverter 53 and the circulation pipeline is equipped with a metering on / off valve 52. Each diverter 53 is located between a water meter 51 and the water reservoir 11 downstream of the circulation pipeline. Through the diverter 53, calibration water from the upstream end of the circulation pipeline can be directed to the water meter 51 or the downstream end of the circulation pipeline, thereby enabling the water value error to be verified using the diverter method. Each water meter 51 is located near the water reservoir 11 downstream of the circulation pipeline and can discharge the tested calibration water into the water reservoir 11, forming a circulation system for the calibration water.

[0057] By controlling the opening and closing of each metering switch valve 52, the calibration water can be transported to different diverters 53, and the calibration water can be introduced into different water meters 51 through the diverters 53. The calibration water for different water consumption can be detected using water meters 51 with different scale divisions, thereby ensuring the detection accuracy of the water quantity detection results under different water consumption conditions.

[0058] The commutator 53 includes a commutator frame 531, a water inlet pipe interface 532, a bellows 533, a rotating connector 534, a commutator pipe 535, a commutator cylinder 536, and a dual-chamber water receiver 537. Typically, a mounting bracket is located above each water meter 51, onto which the dual-chamber water receiver 537 is mounted. The commutator frame 531 is fixed to the top of the dual-chamber water receiver 537. The water inlet pipe interface 532 is located on the top plate of the commutator frame 531. The upper end of the water inlet pipe interface 532 is connected to a metering on / off valve 52 via a pipe, and the lower end is connected to the bellows 533. A bearing seat is located in the middle of the commutator frame 531, and a rotating shaft is located in the middle of the rotating connector 534. The rotating shaft is mounted on the bearing seat via a bearing, forming a rotational connection with the commutator frame 531. The provision of the bellows 533 enables the rotary connector 534 to rotate on the commutator frame 531 while maintaining communication with the water inlet pipe interface 532 .

[0059] The upper end of the reversing tube 535 is connected to the rotating connector 534, and the lower end opening is located at the opening position within the dual-chamber water receiver 537. A reversing cylinder 536 is provided on one side of the reversing frame 531. The piston rod of the reversing cylinder 536 is hinged to the outer wall of the reversing tube 535. The action of the reversing cylinder 536 can drive the reversing tube 535 to swing within the reversing frame 531 along with the rotating connector 534, so that the lower end opening of the reversing tube 535 is located at different positions within the dual-chamber water receiver 537.

[0060] A first water receiving chamber 5371 and a second water receiving chamber 5372 are provided in the double-chamber water receiver 537. The first water receiving chamber 5371 and the second water receiving chamber 5372 are arranged side by side at a certain distance below the opening of the double-chamber water receiver 537. When the reversing tube 535 swings under the drive of the reversing cylinder 536, the lower end opening of the reversing tube 535 is respectively located above the first water receiving chamber 5371 and the second water receiving chamber 5372, so that it is possible to switch whether the calibration water flowing out through the reversing tube 535 flows into the first water receiving chamber 5371 or the second water receiving chamber 5372.

[0061] The first water outlet pipe 5373 is connected to the bottom of the first water receiving chamber 5371, and the second water outlet pipe 5374 is connected to the bottom of the second water receiving chamber 5372. The first water outlet pipe 5373 opens above a water meter 51. The calibration water flowing out of the first water outlet pipe 5373 flows into a water meter 51 for standard water level testing. The second water outlet pipe 5374 is connected to the water reservoir 11. The calibration water flowing out of the second water outlet pipe 5374 is directly discharged from the water reservoir 11 and circulated through the water circulation module 1. Each water meter 51 is connected to the water reservoir 11. After the water level is tested, the calibration water in the water meter 51 is also discharged into the water reservoir 11 and circulated through the water circulation module 1.

[0062] In a preferred embodiment of the multi-meter water meter calibration device of the present application, as Figure 3 and Figure 4 As shown, the water meter 51 is a weighing meter. Specifically, the water meter 51 includes a weighing container 511 and an electronic scale 512. The weighing container 511 is a container for temporarily storing calibration water whose mass needs to be measured. The electronic scale 512 can be a commercially available electronic scale with a measuring accuracy that meets the requirements. The weighing container 511 is placed on the electronic scale 512 and has the same shape and size as the electronic scale 512.

[0063] The first water outlet pipe 5373 in each diverter 53 is located above a weighing container 511. The calibration water flowing out of the first water outlet pipe 5373 flows into the weighing container 511 and is weighed by the corresponding electronic scale 512. A wave-breaking baffle 513 is installed inside the weighing container 511. The wave-breaking baffle 513 is located above the bottom wall of the weighing container 511 and divides the accommodating space within the weighing container 511 into multiple, mutually separated smaller accommodating spaces. This reduces fluctuations in the calibration water injected through the first water outlet pipe 5373 within the weighing container 511, thereby improving the weighing accuracy of the electronic scale 512.

[0064] A drain pipe 514 is provided at the bottom of the weighing container 511. One end of the drain pipe 514 is connected to the weighing container 511, and the other end is connected to the top of the water reservoir 11. A drain valve 515 is provided on the drain pipe 514. After the calibration water collected in the weighing container 511 is weighed, the drain valve 515 is opened to release the calibration water into the water reservoir 11 for recycling.

[0065] A temperature sensor 54 is also installed on the water supply pipe 15 upstream of the metering switch valve 52. This sensor measures the temperature of the calibration water flowing into the weighing container 511. The actual temperature of the calibration water provides the precise density of the calibration water at that temperature. This allows the mass of the calibration water measured by the electronic scale 512 to be converted into its volume, yielding the standard water volume used to determine the water meter's indication error.

[0066] In some embodiments of the multi-position water meter calibration device of the present application, such as Figures 5 to 9 As shown, the water meter clamping module 2 includes an inlet valve 21, a water meter clamp 22, a first end connecting pipe 23, an intermediate connecting pipe 24, a second end connecting pipe 25, and an outlet valve 26. The inlet valve 21 and the outlet valve 26 are respectively connected to the water pipeline 15 upstream and downstream of the water meter clamping module 2. The water meter clamp 22, the first end connecting pipe 23, the intermediate connecting pipe 24, and the second end connecting pipe 25 are coaxially arranged in sequence and are all able to move in the axial direction.

[0067] The water meter clamp 22 is used to clamp the first end connecting tube 23, the middle connecting tube 24, and the second end connecting tube 25 to the water meter 7 to be tested. After clamping, it delivers test water to the water meter 7, allowing the test water to pass through the water meter 7 for verifying the indication error and sealing of the water meter 7. The water meter clamp 22 is provided with a water supply channel for the test water. The distance between the connecting ports at both ends of the water supply channel can be adjusted to move the first end connecting tube 23, the middle connecting tube 24, and the second end connecting tube 25, clamping the water meter 7 to be tested and maintaining the connection and seal between the pipes, the various connecting tubes, and the water inlet and outlet of the water meter 7.

[0068] The intermediate connecting pipe 24 is provided with at least two, such as Figure 5 As shown in FIG, a check point is formed between the intermediate connecting pipe 24 and the first end connecting pipe 23, between adjacent intermediate connecting pipes 24, and between the intermediate connecting pipe 24 and the second end connecting pipe 25. The ends of the first end connecting pipe 23, the intermediate connecting pipe 24, and / or the second end connecting pipe 25 on both sides of the check point are used to press the water inlet and outlet of the water meter 7, thereby ensuring that the calibration water flows through the water meter 7 while preventing leakage of the calibration water. This ensures the accuracy of the calibration result of the water meter 7 and also enables the sealing of the water meter 7 to be verified.

[0069] In a preferred embodiment of the multi-meter water meter calibration device of the present application, as Figure 5 As shown, the water meter clamping module 2 is also provided with a calibration platform 27, which is usually set on the ground, and two spaced connection pipe slide rails 271 are provided on the calibration platform 27. Figure 6 and Figure 7 As shown, sliding supports 28 are provided at the lower parts of the first end connecting tube 23, the middle connecting tube 24, and the second end connecting tube 25. The sliding supports 28 are provided with slide grooves adapted to the connecting tube slide rails 271 and are slidably mounted on the connecting tube slide rails 271, so that the first end connecting tube 23, the middle connecting tube 24, and the second end connecting tube 25 can all slide axially along the connecting tube slide rails 271. A water receiving trough 272 is provided below each meter position to be inspected on the calibration platform 27. The water receiving trough 272 can collect the calibration water flowing out of the circulation pipeline during the installation and removal of the water meter 7 to prevent the water from soaking the calibration site.

[0070] like Figure 5 and Figure 6 As shown, water meter connection structures are provided at both ends of the intermediate connecting pipe 24, as shown in FIG. Figure 5 and Figure 7 As shown, a water meter connection structure is provided at one end of the first end connecting pipe 23 and the second end connecting pipe 25 , and a pressing connection structure 231 is provided at the other end.

[0071] like Figure 6 As shown, the water meter connection structure includes a water meter compression joint 241, a flange positioning plate 242, a flange support 243 and a flange hole positioning column 244. The water meter compression joint 241 is arranged at both ends of the intermediate connecting pipe 24 and one end of the first end connecting pipe 23 and the second end connecting pipe 25. Through the movement of the first end connecting pipe 23, the intermediate connecting pipe 24 and / or the second end connecting pipe 25, the water meter compression joint 241 can be pressed against the water inlet and outlet of the water meter 7 to be inspected, forming a seal connecting the water path. The flange positioning plate 242 is arranged in a fan shape with the connecting pipe as the center, and is fixed to the connecting pipe below the water meter compression joint 241. The flange support 243 is arranged at the edge of the flange positioning plate 242, and can form a support for the flange at the water inlet and outlet of the water meter 7 on the side to be inspected, so that the inlet and outlet pipes of the water meter 7 are coaxially arranged with the first end connecting pipe 23, the intermediate connecting pipe 24 or the second end connecting pipe 25. The flange hole positioning column 244 is installed on the flange positioning plate 242. When the water meter 7 is placed on the flange support 243, the flange hole positioning column 244 can be inserted into the fixing screw hole of the flange at the water inlet and outlet of the water meter 7 on the side to be inspected, thereby limiting the position of the water meter 7 and preventing the water meter 7 from rotating on the flange support 243.

[0072] Depending on the specifications and models of the water meter 7 to be identified, first end connecting tubes 23, middle connecting tubes 24 and second end connecting tubes 25 of different diameters can be selected, and water meter connection structures of different specifications are also set accordingly, so that the inlet and outlet of the water meter 7 to be identified are adapted to the water meter tightening joint 241 and are in a coaxial position, ensuring that a reliable sealed connection is formed between the two.

[0073] A compression connection structure 231 is provided at the other end of the first end connecting pipe 23 and the second end connecting pipe 25, and can be compressed and connected to the water meter clamp 22 and the water outlet valve 26 respectively through the compression leveling structure to form a sealed connection between the water meter clamp 22 and the water outlet valve 26.

[0074] The lengths of the first end connecting pipe 23 and the second end connecting pipe 25 can be the same or different. The lengths of the two are set based on the distance between the water meter clamp 22 and the water outlet valve 26.

[0075] As a specific embodiment of the multi-meter water meter calibration device of the present application, Figure 5 、 Figure 8 and Figure 9 As shown, the water meter clamp 22 includes a compression cylinder 221, a flange sleeve 222, a telescopic compression tube 223, and a compression tube piston 224. The compression cylinder 221 is fixed to the calibration platform 27. The flange sleeve 222 is a pipe with a fixed flange in the middle. It is fixed to one end of the compression cylinder 221 via the fixed flange. The fixed flange seals the end of the compression cylinder 221, forming a piston chamber within the compression cylinder 221. One end of the flange sleeve 222 is disposed within the piston chamber, and the other end is fixedly connected to the water inlet valve 21. The telescopic compression tube 223 has a compression sleeve structure 225 at one end that mates with the compression connection structure 231 at the end of the first end connection tube 23. The other end passes through the end of the compression cylinder 221, enters the piston chamber, and is sleeved onto the flange sleeve 222, allowing the telescopic compression tube 223 to slide relative to the compression cylinder 221 and the flange sleeve 222.

[0076] The compression tube piston 224 is fixed to the end of the telescopic compression tube 223 located at one end in the piston cavity, dividing the piston cavity into two mutually isolated cavities. An air source interface 2211 is provided at each end of the fixed flange and the compression cylinder 221 opposite the fixed flange. The two air source interfaces 2211 are respectively connected to the cavities on both sides of the compression tube piston 224. Sealing rings are provided between the telescopic compression tube 223 and the compression cylinder 221, and between the telescopic compression tube 223 and the flange sleeve 222 to ensure mutual sealing. Pressurized gas is passed into the piston cavity through different air source interfaces 2211, which can drive the compression tube piston 224 to move in different directions, driving the telescopic compression tube 223 to perform telescopic movement in the compression cylinder 221. When the telescopic pressing tube 223 is extended, it can push the first end connecting tube 23, the middle connecting tube 24 and the second end connecting tube 25 to move, thereby pressing multiple water meters at the meter positions to be inspected; when the telescopic pressing tube 223 is retracted, the first end connecting tube 23, the middle connecting tube 24 and the second end connecting tube 25 can move freely, so that multiple water meters can be removed from the meter positions to be inspected.

[0077] In some embodiments of the multi-position water meter calibration device of the present application, such as Figure 5 As shown, the seal verification module 3 includes a drive cylinder 31, a pressure water cylinder 32, and a pressurizing piston 33. The pressure water cylinder 32 is a cylinder body with one end open and the other closed. The pressurizing piston 33 is slidably disposed within the pressure water cylinder 32 and is capable of sliding within the pressure water cylinder 32. The drive cylinder 31 is located at the open end of the pressure water cylinder 32. The piston rod of the drive cylinder is connected to the pressurizing piston 33, which can push the pressurizing piston 33 to slide within the pressure water cylinder 32. The pressure water cylinder 32 is filled with test water. The closed end of the pressure water cylinder 32 is connected to the pipeline in the water meter clamping module 2 via a connecting water pipe. After the water meter clamping module 2 completes the clamping of the water meter 7, the water inlet valve 21 and water outlet valve 26 at both ends of the water meter clamping module 2 are closed. The drive cylinder 31 is activated to pressurize the water in the pressure water cylinder 32 to a set value and maintain it for a set time. This increases the water pressure in the water meter clamping module 2, thereby performing a seal verification on the water meter 7. A pressure sensor can also be provided on the calibration water pipe in the water meter clamping module 2 to automatically detect the water pressure drop in the water meter clamping module 2 during the pressurization process, and thereby determine whether the sealing test of the water meter 7 is qualified.

[0078] like Figure 11As shown, the water circulation module 1 includes a water reservoir 11, a circulating water pump 12, a water filter 13 and a water source pressure-stabilizing tank 14. There can be multiple circulating water pumps 12, and the water inlet of each circulating water pump 12 is connected to the water reservoir 11, and the water outlet is connected to the water source pressure-stabilizing tank 14, so that the water in the water reservoir 11 can be pumped into the water source pressure-stabilizing tank 14. The water source pressure-stabilizing tank 14 has a large volume, and there is a certain volume of air in the upper part of the tank body. As the amount of calibration water pumped into the water source pressure-stabilizing tank 14 increases, the water level in the tank body rises, and the air in the upper part of the tank body is compressed to form a certain pressure, driving the water in the water source pressure-stabilizing tank 14 into the circulating water through the water pipe 15 connected to the bottom of the tank body, and then transported to the water meter 7 for water meter calibration.

[0079] The establishment of the water source pressure stabilizing tank 14 can reduce the start and stop of the circulating water pump 12, or the opening and closing of the switch valve in the circulating water circuit, which causes a large change in the pressure in the circulating water circuit, thereby improving the stability of the calibration water flow in the circulating water circuit.

[0080] The water source pressure regulating tank 14 may be provided with a pressure sensor to control the start and stop of the two circulating water pumps 12 according to the pressure in the water source pressure regulating tank 14. The water reservoir 11 may also be provided with a water supply pipe to replenish the test water in the water reservoir 11 when the water volume is too low.

[0081] The water quality filter 13 can use a PP cotton filter. The water quality filter 13 is arranged between the water outlet of a circulating water pump 12 and the water reservoir 11. It can filter part of the water in the water reservoir 11 and send the filtered water to the water reservoir 11 to prevent the water quality of the calibration water in the water reservoir 11 from deteriorating after long-term circulation.

[0082] The water source pressure stabilizing tank 14 is connected to the water meter holding module 2, the flow detection module 4 and the water metering module 5 in sequence through the water delivery pipe 15. The water in the water metering module 5 flows back to the water reservoir 11 to form a circulation pipeline.

[0083] In some embodiments of the multi-position water meter calibration device of the present application, such as Figure 5 As shown, a water value identification device 6 is also provided on one side of the water meter clamping module 2. Typically, an identification device bracket 273 is provided on the calibration platform 27, and multiple water value identification devices 6 are slidably mounted on the identification device bracket 273. The water value identification devices 6 typically use cameras with image recognition capabilities. The camera of each water value identification device 6 is set toward a meter position to be inspected, and is used to automatically collect the reading of a non-mechanical water meter in real time, thereby automating the water meter calibration process.

[0084] When calibrating a water meter, the on-off valves at both ends of the water meter clamping module 2 are closed, such as the water inlet valve 21 and the water outlet valve 26. The first end connecting tube 23, the intermediate connecting tube 24, and the second end connecting tube 25 are moved, and multiple water meters 7 are placed at the meter locations to be inspected, respectively, between the first end connecting tube 23 and the intermediate connecting tube 24, between adjacent intermediate connecting tubes 24, and between the intermediate connecting tube 24 and the second end connecting tube 25. If the number of water meters 7 to be calibrated is less than the number of meter locations to be inspected, direct water pipes can be installed at the meter locations to be inspected where no water meters 7 are installed. The water meter clamp 22 is controlled to extend, pushing the first end connecting tube 23, the intermediate connecting tube 24, and the second end connecting tube 25 to press against the water inlet and outlet of the water meter 7 to form a sealed connection. Simultaneously, the water meter clamp 22 presses against the first end connecting tube 23 and the second end connecting tube 25 against the outlet valve 26, achieving a sealed connection between the water meters.

[0085] The multiple diverters 53 are controlled so that their outlets are located above the second water outlet pipe 5374. The inlet valve 21 and outlet valve 26 are opened to allow the calibration water to circulate through the water meter clamping module 2, expelling air from the circulation line. The branch switch valves 44 on the three flow detection branches are opened, and the valve openings of the flow control valves 43 are adjusted so that the readings of the flow meters 41 in the three flow detection branches are equal to the normal flow rate Q3, the cutoff flow rate Q2, and the minimum flow rate Q1 of the water meter 7, respectively.

[0086] Close the water inlet valve 21 and the water outlet valve 26, activate the seal verification module 3, and increase the test water pressure in the water meter 7 to perform a seal test. Maintain the water pressure at 1.6 times the maximum operating pressure (MAP) for 1 minute. Observe the water meter 7 for leaks, damage, or changes in water pressure in the pipeline. Close the seal verification module 3. If any water meter 7 fails the seal test, replace it and retest it. Otherwise, proceed to the next step, the indication error test.

[0087] The shunt switch valve 44 on each flow detection branch is opened sequentially, along with the water inlet valve 21 and the water outlet valve 26. Simultaneously, the water meter 7 reading begins (electronic water meters use a calibration pulse signal, while mechanical water meters use a water indication recognition device 6). The flow meter 41 reading is read, and a corresponding reversing device 53 is activated to switch the reversing tube 535 over the first water receiving chamber 5371. After a specified period of time or after a set calibration volume of water has flowed, the reversing tube 535 is switched over to the first water receiving chamber 5371 while the water meter 7 reading is read.

[0088] Obtain the reading difference of the water meter 7, that is, the calibration water volume reading Vi = |V1-V0| displayed by the water meter 7, where V0 represents the initial reading of the water meter 7 and V1 represents the final reading of the water meter 7. Obtain the calibration water volume Va = Q×ta measured by the flow meter 41, where Q is the flow value displayed by the flow meter 41 and ta is the calibration duration. The calibration water volume measured by the water meter 51 , where c is the weighing buoyancy correction coefficient, which is 1.0011, Ma is the mass of the calibration water measured by the electronic scale 512, and ρ is the density of water. Calculate the indication error of water meter 7 When calculating the indication error E of water meter 7 using the flow reversal method, Va is replaced by Va'. Determine whether the indication error verification result of water meter 7 is qualified according to the "Verification Procedure for Drinking Cold Water Meters" (JJG 162-2019).

[0089] Throughout the description of this application, reference to terms such as "one embodiment," "specific embodiment," and "preferred embodiment" means that the specific features, structures, materials, or characteristics described in conjunction with that embodiment or example are included in at least one embodiment or example of this application. In this application, schematic representations of the above terms do not necessarily refer to the same embodiment or example. Furthermore, the specific features, structures, materials, or characteristics described may be combined in any suitable manner in any one or more embodiments or examples.

[0090] The above are all preferred embodiments of the present application, and are not intended to limit the scope of protection of the present application. Therefore, any equivalent changes made based on the structure, shape, and principle of the present application should be included in the scope of protection of the present application.

Claims

1. A multi-position water meter calibration device, characterized in that: The invention comprises a water circulation module (1), a water meter clamping module (2), a sealing verification module (3), a flow detection module (4) and a water metering module (5), wherein the water circulation module (1) can drive the verification water to circulate in the circulation pipeline, the water meter clamping module (2) comprises a plurality of meter positions to be inspected, and the plurality of meter positions to be inspected are arranged in series on the circulation pipeline, the sealing verification module (3) is connected to the water meter clamping module (2), the flow detection module (4) and the water metering module (5) are respectively arranged on the circulation pipeline, the flow detection module (4) comprises a plurality of flow meters (41), the scale grids of the plurality of flow meters (41) are different, and one of them is connected to the circulation pipeline, and the water metering module (5) comprises a plurality of water meters (51), the scale grids of the plurality of water meters (51) are different, and one of them is connected to the circulation pipeline.

2. The multi-position water meter calibration device according to claim 1, characterized in that: The flow detection module (4) further comprises a water diversion pipeline (42), a flow regulating valve (43), a shunt switch valve (44) and a merging pipeline (45). The water diversion pipeline (42) comprises a water diversion inlet pipe (421) and a plurality of water diversion outlet pipes (422) connected to each other. The water diversion inlet pipe (421) is connected to the water meter clamping module (2). The merging pipeline (45) comprises a merging connecting pipe (451) and a plurality of shunt connecting pipes (452) connected to each other. The merging connecting pipe (451) is connected to the water metering module (5). A plurality of the flow regulating valves (43) and the shunt switch valves (44) are provided. Each flow regulating valve (43) is connected to a shunt switch valve (44) and a flow meter (41) to form a flow detection shunt. Each flow detection shunt is connected between a water diversion outlet pipe (422) and a corresponding shunt connecting pipe (452).

3. The multi-position water meter calibration device according to claim 2, characterized in that: The nominal diameters of the water outlet pipe (422), the flow regulating valve (43), the shunt switch valve (44), the flow meter (41), and the shunt connecting pipe (452) on each flow detection shunt are the same, while the nominal diameters of the water outlet pipe (422), the flow regulating valve (43), the shunt switch valve (44), the flow meter (41), and the shunt connecting pipe (452) on different flow detection shunts are in a multiple relationship.

4. The multi-position water meter calibration device according to claim 1, characterized in that: The water metering module (5) further comprises a plurality of metering switch valves (52) and a plurality of diverters (53), each of the metering switch valves (52) being connected between the upstream end of the circulation pipeline and one of the diverters (53), the diverter (53) comprising a diverter frame (531), a water inlet pipe interface (532), a bellows (533), a rotating connector (534), a diverter pipe (535), a diverter cylinder (536) and a double-chamber water receiver (537), the water inlet pipe The interface (532) is provided on the upper portion of the commutator frame (531) and is respectively connected to one of the metering switch valves (52). The bellows (533) is connected between the water inlet pipe interface (532) and the rotating connector (534). The rotating connector (534) is rotatably connected to the commutator frame (531). The reversing pipe (535) is connected to the rotating connector (534). The double-chamber water receiver (537) is provided on the commutator frame ( 531), comprising a first water receiving chamber (5371), a second water receiving chamber (5372), a first water outlet pipe (5373) and a second water outlet pipe (5374); the first water receiving chamber (5371) and the second water receiving chamber (5372) are arranged in parallel; the first water outlet pipe (5373) and the second water outlet pipe (5374) are respectively arranged at the bottom of the first water receiving chamber (5371) and the second water receiving chamber (5372); the reversing cylinder (536) is arranged The reversing device (531) is connected to the reversing tube (535) so as to drive the outlet of the reversing tube (535) to switch between the first water receiving chamber (5371) and the second water receiving chamber (5372). The first water outlet pipe (5373) is connected to one of the water meters (51), and the second water outlet pipe (5374) is connected to the downstream end of the circulation pipeline. Each of the water meters (51) is connected to the downstream end of the circulation pipeline.

5. The multi-position water meter calibration device according to claim 4, characterized in that: The water meter (51) is a weighing meter. The water metering module (5) further includes a temperature sensor (54). The temperature sensor (54) is arranged on the circulation pipeline adjacent to the metering switch valve (52). The water meter (51) includes a weighing container (511) and an electronic scale (512). The weighing container (511) is arranged on the electronic scale (512). The first water outlet pipe (5373) of each of the commutators (53) is located above one of the weighing containers (511). A wave-proof baffle (513) is arranged inside the weighing container (511). A drain pipe (514) is arranged at the bottom of the weighing container (511). The drain pipe (514) is connected to the downstream end of the circulation pipeline. A drain valve (515) is arranged on the drain pipe (514).

6. The multi-position water meter calibration device according to claim 1, characterized in that: The water meter clamping module (2) comprises a water inlet valve (21), a water meter clamp (22), a first end connecting pipe (23), an intermediate connecting pipe (24), a second end connecting pipe (25) and a water outlet valve (26). The water inlet valve (21) and the water outlet valve (26) are respectively connected to the upstream and downstream ends of the circulation pipeline. The water meter clamp (22), the first end connecting pipe (23), the intermediate connecting pipe (24) and the second end connecting pipe (25) are coaxially arranged in sequence and can move in the axial direction. The water meter clamp (22) comprises two interconnected connecting ports, one of which is connected to the water inlet valve (21) and can change the distance between the two connecting ports. The intermediate connecting pipe (24) is provided with at least two, and the meter position to be inspected can be formed between the intermediate connecting pipe (24) and the first end connecting pipe (23), between the intermediate connecting pipes (24), and between the intermediate connecting pipe (24) and the second end connecting pipe (25).

7. The multi-position water meter calibration device according to claim 6, characterized in that: The water meter clamping module (2) further comprises a calibration platform (27), wherein a connecting pipe slide rail (271) is provided on the calibration platform (27), wherein the first end connecting pipe (23), the middle connecting pipe (24) and the second end connecting pipe (25) are all slidably mounted on the connecting pipe slide rail (271), and water meter connection structures are provided at both ends of the middle connecting pipe (24) and one end of the first end connecting pipe (23) and the second end connecting pipe (25), wherein the water meter connection structure comprises a water meter compression joint (241), a flange positioning plate (242), a flange support (243) and a flange hole positioning column (244), wherein the water meter compression joint (241) is provided at the flange. The ends of the first end connecting pipe (23), the middle connecting pipe (24) or the second end connecting pipe (25) are capable of pressing the water inlet and outlet of the water meter to be inspected to form a sealed connection. The flange positioning plate (242) is arranged below the water meter pressing joint (241). The flange support (243) is arranged at the edge of the flange positioning plate (242). The flange hole positioning column (244) is installed on the flange positioning plate (242). The other ends of the first end connecting pipe (23) and the second end connecting pipe (25) are provided with and can be sealedly connected to the water meter clamp (22) and the water outlet valve (26) respectively through a pressing and leveling structure.

8. The multi-position water meter calibration device according to claim 7, characterized in that: The water meter clamp (22) comprises a compression cylinder (221), a flange sleeve (222), a telescopic compression tube (223) and a compression tube piston (224). The compression cylinder (221) is fixed on the calibration platform (27). The flange sleeve (222) is fixed to one end of the compression cylinder (221), and one end is connected to the water inlet valve (21), and the other end is located inside the compression cylinder (221). The telescopic compression tube (223) is fixed to the calibration platform (27). ) is sleeved on the flange sleeve (222) and can slide on the flange sleeve (222), one end of the telescopic pressing tube (223) extends out of the pressing cylinder (221), and a pressing connection structure is provided at the end, the pressing tube piston (224) is provided at the other end of the telescopic pressing tube (223), and a sliding sealing structure is provided between the telescopic pressing tube (223), the pressing cylinder (221) and the flange sleeve (222).

9. The multi-position water meter calibration device according to claim 1, characterized in that: The sealing verification module (3) includes a driving cylinder (31), a pressure water cylinder (32) and a pressurizing piston (33). The pressurizing piston (33) is slidably arranged in the pressure water cylinder (32) and can slide in the pressure water cylinder (32) under the push of the driving cylinder (31). The pressure water cylinder (32) is connected to the water meter clamping module (2). The water circulation module (1) includes a water reservoir (11), a circulating water pump (12), a water quality filter (13) and a water source pressure stabilizer. The water inlet of the circulating water pump (12) is connected to the water reservoir (11), and the water outlet is connected to the water source pressure stabilizing tank (14). The water quality filter (13) is arranged between the water outlet of the circulating water pump (12) and the water reservoir (11). The water source pressure stabilizing tank (14) is connected to the water meter clamping module (2), the flow detection module (4) and the water metering module (5) through a water delivery pipeline, and is connected to the water reservoir (11), thereby forming the circulating pipeline.

10. The multi-position water meter calibration device according to any one of claims 1 to 9, characterized in that: It also includes a water representation value identification device (6), wherein a plurality of the water representation value identification devices (6) are provided and are arranged in a one-to-one correspondence with the plurality of the to-be-checked positions.

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