Water meter calibration device

Abstract

The present application provides a water meter calibration device, belonging to the field of instrumentation. The water meter calibration device includes a calibration assembly, which includes a main line, a first standard meter, a first meter clamp, a second meter clamp, a first branch line, and a second branch line: the main line has a first water meter installation position between the first standard meter and the first meter clamp; the main line has a second water meter installation position between the second meter clamp and the first meter clamp; the first end of the first branch line connects between the first standard meter and the first water meter installation position, and the second end connects between the first meter clamp and the second water meter installation position; the first end of the second branch line connects between the first meter clamp and the second water meter installation position, and the second end connects to the end of the second meter clamp away from the second water meter installation position; a first valve is connected in series in the first branch line, and a second valve is connected in series in the second branch line. The water meter calibration device is conducive to reducing pressure loss of water flow.

Description

Technical Field

[0001] The present application relates to the field of instruments, and in particular to a water meter calibration device. Background Art

[0002] A water meter is a measuring instrument used to measure the total volume of water flowing through a closed, full pipe. Water meters are subject to mandatory inspection, and all factory-issued water meters must undergo inspection before use. Only after passing the inspection can they be installed and used.

[0003] Water meters are typically calibrated for three flow rates: minimum flow rate Q1, cutoff flow rate Q2, and common flow rate Q3. The minimum flow rate Q1 and cutoff flow rate Q2 are smaller, while the common flow rate Q3 is larger. Water meters are typically calibrated using a water meter calibration device. A single water meter calibration device can connect multiple water meters for simultaneous calibration. Multiple water meters are connected in series to the device, with water flowing sequentially through them.

[0004] When calibrating the commonly used flow rate Q3, the pressure loss of water flow in the water meter calibration device is large, which will cause the flow rate provided by the calibration device to fail to meet the required water flow rate and thus make it impossible to perform calibration as required by the regulations. Summary of the Invention

[0005] The embodiment of the present application provides a water meter calibration device that helps reduce the pressure loss of water flow and allows the water meter calibration device to calibrate multiple water meters simultaneously. The technical solution is as follows:

[0006] An embodiment of the present application provides a water meter calibration device, comprising a calibration component, the calibration component comprising a main line and:

[0007] First measurement standard table;

[0008] a first meter clamp, wherein the main line has at least one first water meter installation position between the first measurement standard meter and the first meter clamp;

[0009] a second meter clamp, wherein the main line has at least one second water meter installation position between the second meter clamp and the first meter clamp;

[0010] The water meter calibration device also includes a first branch line and a second branch line connected to the main line, the first end of the first branch line is connected between the first metering standard meter and the first water meter installation position, and the second end is connected between the first meter clamp and the second water meter installation position, the first end of the second branch line is connected between the first meter clamp and the second water meter installation position, and the second end is connected to the end of the second meter clamp away from the second water meter installation position, a first valve is connected in series in the first branch line, and a second valve is connected in series in the second branch line.

[0011] In some examples, a diameter of at least one of the first branch line and the second branch line is larger than a diameter of the main line.

[0012] In some examples, the diameter of the first branch pipeline and the diameter of the second branch pipeline are the same, and both are at least twice the diameter of the main pipeline.

[0013] In some examples, the verification assembly further includes a three-way pipe joint, through which the second end of the first branch line and the first end of the second branch line are connected to the main line.

[0014] In some examples, the main line is further connected in series with at least one of the following:

[0015] The third valve is connected in series between the first measurement standard meter and the first water meter installation position, and the connection point between the first end of the first branch line and the main line is located between the first measurement standard meter and the third valve.

[0016] In some examples, the verification assembly further includes a fourth valve and a third branch line, the fourth valve being serially connected to the main line and located between the first measurement standard meter and the first water meter installation location, and the connection between the first end of the first branch line and the main line is located between the fourth valve and the first water meter installation location;

[0017] One end of the third branch line is communicated with one end of the fourth valve, and the other end is communicated with the other end of the fourth valve. The diameter of the third branch line is different from that of the main line.

[0018] In some examples, the verification component further includes a second meter standard meter, and the second meter standard meter is serially connected to the third branch line.

[0019] In some examples, the main line is also connected in series with a third meter clamp, and is connected in series between the first standard meter and the first water meter installation position, and the connection between the first end of the first branch line and the main line is located between the third meter clamp and the first water meter installation position; the main line also has at least one third water meter installation position, and the third water meter installation position is located between the first standard meter and the third meter clamp.

[0020] In some examples, a third standard meter is further connected in series to the main line, and the third standard meter is located at an end of the second meter clamp away from the installation position of the second water meter.

[0021] In some examples, the water meter calibration device includes at least two calibration components, and the main pipes of different calibration components have different diameters.

[0022] The beneficial effects of the technical solutions provided in the embodiments of the present application include at least:

[0023] By connecting a first standard meter, a first meter clamp, and a second meter clamp in series within the main line, the first meter clamp can clamp a portion of the water meters to be inspected to the first water meter mounting position, while the second meter clamp can clamp another portion of the water meters to be inspected to the second water meter mounting position. During the calibration process of the water meters to be inspected, the first standard meter can measure the amount of water flowing through the main line, providing a comparison standard for the water meters to be inspected. By providing a first branch line and a second branch line connected to the main line within the calibration assembly, a first valve is connected in series to control the on / off of the first branch line, while a second valve is connected in series to control the on / off of the second branch line. The first end of the first branch pipeline is connected between the first metering standard meter and the first water meter installation position, and the second end is connected between the first meter clamp and the second water meter installation position. After opening the first valve, it is equivalent to adding a water flow path, which can reduce the pressure loss of the water meter to be inspected when the water flows through the first water meter installation position; the first end of the second branch pipeline is connected between the first meter clamp and the second water meter installation position, and the second end is connected to the end of the second meter clamp away from the second water meter installation position. After opening the second valve, it is equivalent to adding a water flow path, which can reduce the pressure loss of the water meter to be inspected when the water flows through the second water meter installation position. During the calibration of water meters, when a smaller flow rate is required to calibrate the minimum flow rate or the boundary flow rate, the first valve and the second valve can be closed for calibration; when a larger flow rate is required to calibrate the commonly used flow rate, the water meter to be inspected at the first water meter installation position and the water meter to be inspected at the second water meter installation position can be calibrated separately. When calibrating the water meter to be inspected at the first water meter installation position, the first valve can be closed and the second valve can be opened to reduce the pressure loss generated by the pipe or water meter after the water meter to be inspected at the first water meter installation position; when calibrating the water meter to be inspected at the second water meter installation position, the first valve can be opened and the second valve can be closed to reduce the pressure loss generated by the pipe or water meter before the water meter to be inspected at the second water meter installation position, thereby reducing the pressure loss of the water flow, increasing the number of meters calibrated at the same time, improving production efficiency, and reducing the pressure requirements of the water meter calibration device on the water pump, thereby saving energy consumption. BRIEF DESCRIPTION OF THE DRAWINGS

[0024] In order to more clearly illustrate the technical solutions in the embodiments of the present application, the following briefly introduces the drawings required for use in the embodiments or descriptions of the prior art. Obviously, the drawings described below are only some embodiments of the present application. For ordinary technicians in this field, other drawings can be obtained based on these drawings without any creative work.

[0025] Figure 1This is a schematic structural diagram of a water meter calibration device provided in an embodiment of the present application;

[0026] Figure 2 It is a structural schematic diagram of a water meter calibration device provided in an embodiment of the present application.

[0027] Figure Number:

[0028] Calibration component: 100; bracket: 101; main line: 11; water outlet: 11a; first branch line: 12; second branch line: 13; third branch line: 14; fourth branch line: 15; first standard meter: 21; second standard meter: 22; third standard meter: 23; fourth standard meter: 24; first meter clamp: 31; second meter clamp: 32; third meter clamp: 33; first water meter installation position: 41; second water meter installation position: 42; third water meter installation position: 43; first valve: 51; second valve: 52; third valve: 53; fourth valve: 54; fifth valve: 55; sixth valve: 56; seventh valve: 57; three-way pipe joint: 61; first flexible joint: 141; second flexible joint: 551. DETAILED DESCRIPTION

[0029] In the following description, specific details such as specific system structures and techniques are provided for purposes of illustration rather than limitation to facilitate a thorough understanding of the embodiments of the present application. However, it will be apparent to those skilled in the art that the present application may be implemented in other embodiments without these specific details. In other cases, detailed descriptions of well-known systems, devices, circuits, and methods are omitted to avoid obscuring the description of the present application with unnecessary detail.

[0030] It will also be understood that the term "and / or" used in this specification and the appended claims refers to and includes any and all possible combinations of one or more of the associated listed items.

[0031] It should be noted that when an element is referred to as being “fixed on” or “disposed on” another element, it may be directly on the other element or indirectly on the other element. When an element is referred to as being “connected to” another element, it may be directly connected to the other element or indirectly connected to the other element.

[0032] It should be understood that the terms "length", "width", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside", etc., indicating the orientation or position relationship, are based on the orientation or position relationship shown in the accompanying drawings, and are only for the convenience of describing this application and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation on this application.

[0033] In addition, in the description of the present application specification and the appended claims, the terms "first", "second", "third", etc. are only used to distinguish the descriptions and cannot be understood as indicating or implying relative importance.

[0034] References to "one embodiment" or "some embodiments" in the present specification mean that one or more embodiments of the present application include specific features, structures or characteristics described in conjunction with the embodiment. Therefore, the phrases "in one embodiment", "in some embodiments", "in some other embodiments", "in some other embodiments", etc. that appear in different places in this specification do not necessarily refer to the same embodiment, but mean "one or more but not all embodiments", unless otherwise specifically emphasized. The terms "including", "comprising", "having" and their variations all mean "including but not limited to", unless otherwise specifically emphasized. "Multiple" means two or more.

[0035] Figure 1 This is a schematic diagram of the structure of a water meter calibration device provided in an embodiment of the present application. Figure 1 As shown, the water meter verification device includes a verification component 100. The verification component 100 includes a main line 11 and a first meter standard 21, a first meter clamp 31 and a second meter clamp 32 connected in series in the main line 11 in sequence.

[0036] The main line 11 may include multiple pipes, and the serially connected structure may be connected between adjacent pipes. For example, the first metering standard meter 21 may be serially connected at one end of the main line 11 between two adjacent pipes.

[0037] The main line 11 has at least one first water meter mounting location 41 between the first standard meter 21 and the first meter clamp 31. The main line 11 has opposite ends: a water inlet at one end and a drain at the other. The water inlet of the main line 11 can be connected to a water pump. The first standard meter 21 can be located between the water inlet of the main line 11 and the first meter clamp 31.

[0038] As an example, eight first water meter mounting positions 41 may be provided. These first water meter mounting positions 41 are used to mount the water meter to be inspected, with each first water meter mounting position 41 capable of mounting one water meter to be inspected. The first water meter mounting positions 41 may be two adjacent, separate pipes in the main pipeline 11. The water meter to be inspected may be installed between the two adjacent pipes, connected to each of the two adjacent pipes. The first meter clamp 31 can push the pipes to move, clamping the water meter to be inspected in the first water meter mounting position 41, that is, between the two adjacent pipes.

[0039] The main line 11 has at least one second water meter installation position 42 between the second meter clamp 32 and the first meter clamp 31 .

[0040] As an example, eight second water meter mounting positions 42 may be provided. The second water meter mounting positions 42 are used to mount water meters to be inspected, and each second water meter mounting position 42 can mount one water meter to be inspected. The second water meter mounting positions 42 may be identical to the first water meter mounting positions 41 and are also used to mount water meters to be inspected.

[0041] The verification assembly 100 further includes a first branch line 12 and a second branch line 13 communicating with the main line 11 .

[0042] The first branch pipeline 12 and the second branch pipeline 13 may also include multiple pipelines, and devices can be installed between adjacent pipelines.

[0043] The first end of the first branch line 12 connects between the first standard meter 21 and the first water meter installation location 41, and the second end of the first branch line 12 connects between the first meter clamp 31 and the second water meter installation location 42. The first end of the second branch line 13 connects between the first meter clamp 31 and the second water meter installation location 42, and the second end of the second branch line 13 connects to the end of the second meter clamp 32 away from the second water meter installation location 42. A first valve 51 is connected in series to the first branch line 12, and a second valve 52 is connected in series to the second branch line 13.

[0044] By connecting the first meter standard meter 21, the first meter clamp 31, and the second meter clamp 32 in series in the main line 11, the first meter clamp 31 can clamp a portion of the water meters to be inspected to the first water meter installation position 41, and the second meter clamp 32 can clamp another portion of the water meters to be inspected to the second water meter installation position 42. During the calibration process of the water meters to be inspected, the first meter standard meter 21 can measure the amount of water flowing through the main line 11, providing a comparison standard for the water meters to be inspected. By providing a first branch line 12 and a second branch line 13 connected to the main line 11 in the calibration component 100, a first valve 51 is connected in series in the first branch line 12 to control the on / off of the first branch line 12, and a second valve 52 is connected in series in the second branch line 13 to control the on / off of the second branch line 13. The first end of the first branch line 12 is connected between the first metering standard meter 21 and the first water meter installation position 41, and the second end is connected between the first meter clamp 31 and the second water meter installation position 42. After the first valve 51 is opened, it is equivalent to adding a water flow path, which can reduce the pressure loss of the water meter to be inspected when the water flows through the first water meter installation position 41; the first end of the second branch line 13 is connected between the first meter clamp 31 and the second water meter installation position 42, and the second end is connected to the end of the second meter clamp 32 away from the second water meter installation position 42. After the second valve 52 is opened, it is equivalent to adding a water flow path, which can reduce the pressure loss of the water meter to be inspected when the water flows through the second water meter installation position 42.

[0045] During the calibration of the water meter to be inspected, when a smaller flow rate is required to calibrate the minimum flow rate or the boundary flow rate, the first valve 51 and the second valve 52 can be closed for calibration; when a larger flow rate is required to calibrate the commonly used flow rate, the water meter to be inspected at the first water meter installation position 41 and the water meter to be inspected at the second water meter installation position 42 can be calibrated separately. When calibrating the water meter to be inspected at the first water meter installation position 41, the first valve 51 can be closed and the second valve 52 can be opened to reduce the pressure loss generated by the pipeline or water meter after the water meter to be inspected at the first water meter installation position 41; when calibrating the water meter to be inspected at the second water meter installation position 42, the first valve 51 can be opened and the second valve 52 can be closed to reduce the pressure loss generated by the pipeline or water meter before the water meter to be inspected at the second water meter installation position 42, thereby reducing the pressure loss of the water flow, increasing the number of meters calibrated at the same time, improving production efficiency, and reducing the pressure requirements of the water meter calibration device on the water pump, thereby saving energy consumption.

[0046] In some examples, a diameter of at least one of the first branch line 12 and the second branch line 13 is larger than a diameter of the main line 11 .

[0047] As an example, the diameters of the first branch pipeline 12 and the second branch pipeline 13 are both larger than the diameter of the main pipeline 11 .

[0048] During the calibration process, water will first flow through the water meter to be inspected located at the first water meter installation position 41, and then flow through the water meter to be inspected located at the second water meter installation position 42. The water flow will generate a certain pressure loss in the main line 11. However, when calibrating the minimum flow rate and the cutoff flow rate of the water meter to be inspected, the water flow rate flowing through the water meter to be inspected is relatively small, and the pressure loss generated by the water flow in the main line 11 is relatively small, so the minimum flow rate and the cutoff flow rate of the water meter to be inspected can still be calibrated relatively accurately. During the process of calibrating the normal flow rate of the water meter to be inspected located at the first water meter installation position 41, the water flow rate flowing through the water meter to be inspected is relatively large. After passing through the water meter to be inspected located at the first water meter installation position 41, the water flow can flow through the first branch line 12 with a larger pipe diameter. The larger the pipe diameter, the smaller the pressure loss generated, so that the normal flow rate of the water meter to be inspected located at the first water meter installation position 41 can be calibrated relatively accurately. When calibrating the normal flow rate of the water meter to be inspected located at the second water meter installation position 42, the water can flow through the second branch pipeline 13 with a larger pipe diameter before passing through the water meter to be inspected located at the second water meter installation position 42, thereby reducing pressure loss and making the calibration result more accurate.

[0049] Optionally, the diameter of the first branch pipeline 12 and the diameter of the second branch pipeline 13 are the same, and both are at least twice the diameter of the main pipeline 11 .

[0050] As an example, the diameters of the first branch pipeline 12 and the second branch pipeline 13 are both three times the diameter of the main pipeline 11 .

[0051] Setting the diameters of the first branch pipeline 12 and the second branch pipeline 13 to be more than twice that of the main pipeline 11 can significantly reduce pressure loss and improve the accuracy of the test.

[0052] like Figure 1 As shown, the test assembly 100 further includes a three-way pipe joint 61, through which the second end of the first branch line 12 and the first end of the second branch line 13 are connected to the main line 11. The three-way pipe joint 61 is used for connection, which facilitates assembly.

[0053] like Figure 1 As shown, a third valve 53 is also connected in series to the main line 11. The third valve 53 is connected in series between the first metering standard meter 21 and the first water meter installation position 41, and the connection between the first end of the first branch line 12 and the main line 11 is located between the first metering standard meter 21 and the third valve 53.

[0054] The third valve 53 can be used in conjunction with the first valve 51. To verify the normal flow rate of the water meter to be inspected, located at the second water meter installation location 42, the first valve 51 can be opened, and the second and third valves 52, 53 can be closed, allowing water to flow from the first branch line 12 around the water meter to be inspected, located at the first water meter installation location 41. To verify the normal flow rate of the water meter to be inspected, located at the first water meter installation location 41, the first valve 51 can be closed, and the second and third valves 52, 53 can be opened, allowing water to flow through the second branch line 13.

[0055] like Figure 1 As shown, the verification assembly 100 further includes a fourth valve 54 and a third branch line 14. The fourth valve 54 is connected in series to the main line 11. The fourth valve 54 is located between the first measurement standard meter 21 and the first water meter installation position 41. The connection between the first end of the first branch line 12 and the main line 11 is located between the fourth valve 54 and the first water meter installation position 41.

[0056] One end of the third branch line 14 is connected to one end of the fourth valve 54 , and the other end of the third branch line 14 is connected to the other end of the fourth valve 54 . The diameter of the third branch line 14 is different from that of the main line 11 .

[0057] As an example, the diameter of the third branch pipeline 14 is smaller than the diameter of the main pipeline 11 .

[0058] During the calibration process, fourth valve 54 is either open or closed. For example, if the diameter of third branch line 14 is smaller than that of main line 11, when a smaller flow rate is required for calibration, such as to verify the minimum flow rate or cutoff flow rate of the water meter, fourth valve 54 can be closed, allowing water to bypass the section of pipe where fourth valve 54 is located and flow through the smaller diameter third branch line 14. When a larger flow rate is required for calibration, such as to verify the meter's normal flow rate, fourth valve 54 can be opened to add a new flow path and further reduce pressure loss.

[0059] like Figure 1 As shown, the verification assembly 100 further includes a second meter standard meter 22 , which is serially connected to the third branch line 14 .

[0060] The second measurement standard meter 22 can calibrate the flow in the third branch pipeline 14 so as to more accurately calibrate the flow of the water meter to be tested.

[0061] As an example, if the diameter of the third branch line 14 is smaller than that of the main line 11, the accuracy of the second standard meter 22 can be higher than that of the first standard meter 21. When the fourth valve 54 is closed and a smaller flow rate is used to verify the minimum flow rate or the cutoff flow rate, water flows through the smaller diameter third branch line 14, and the flow rate is verified using the more accurate second standard meter 22, which can improve the verification accuracy of the water meter to be tested.

[0062] A first flexible joint 141 may also be connected in series in the third branch pipeline 14 , and the first flexible joint 141 functions as a flexible connection.

[0063] like Figure 1 As shown, the main line 11 is further connected in series with a third meter clamp 33, which is connected in series between the first standard meter 21 and the first water meter installation position 41. The connection between the first end of the first branch line 12 and the main line 11 is located between the third meter clamp 33 and the first water meter installation position 41. The main line 11 also has at least one third water meter installation position 43, which is located between the first standard meter 21 and the third meter clamp 33.

[0064] The third water meter mounting position 43 can also be used to install a water meter to be inspected. As an example, three third water meter mounting positions 43 can be provided. In this example, a verification assembly 100 has eight first water meter mounting positions 41, eight second water meter mounting positions 42, and three third water meter mounting positions 43. In other words, the verification assembly 100 can simultaneously verify 19 water meters to be inspected.

[0065] When calibrating the minimum flow rate or the demarcation flow rate of the water meter to be inspected, both the first valve 51 and the second valve 52 can be in the closed state. When calibrating the water meter to be inspected located in the third water meter installation position 43 at the normal flow rate, the first valve 51 and the second valve 52 can be opened to allow water to flow through the first branch line 12 and the second branch line 13 with larger diameters, thereby reducing pressure loss and improving the calibration accuracy of the water meter to be inspected located in the third water meter installation position 43. Providing fewer third water meter installation positions 43 allows for calibration of a greater number of water meters, which is beneficial for improving calibration efficiency. This can also avoid significantly affecting the calibration accuracy of the water meters to be inspected located in the first water meter installation position 41 and the second water meter installation position 42.

[0066] like Figure 1 As shown, a third standard meter 23 is further connected in series in the main line 11 , and the third standard meter 23 is located at one end of the second meter clamp 32 away from the second water meter installation position 42 .

[0067] The third measurement standard table 23 is close to the end of the main line 11. After the water flows through the water meters to be inspected, the first branch line 12, the second branch line 13 and other structures, the water flow rate converged to the main line 11 is calibrated. Combined with the calibration data of the first measurement standard table 21, the flow rate flowing through the water meters to be inspected can be obtained more accurately, thereby improving the accuracy of the calibration.

[0068] like Figure 1 As shown, a fifth valve 55 and a fourth branch line 15 may be connected in series to the main line 11. The fifth valve 55 is connected in series to the main line 11 and is located at the end of the third measurement standard meter 23 away from the second meter clamp 32. One end of the fourth branch line 15 is connected to one end of the fifth valve 55, and the other end is connected to the other end of the fifth valve 55. The diameter of the fourth branch line 15 is different from that of the main line 11.

[0069] As an example, the diameter of the fourth branch pipeline 15 is smaller than the diameter of the main pipeline 11 .

[0070] During the calibration process, fifth valve 55 is either open or closed. For example, if the diameter of fourth branch line 15 is smaller than that of main line 11, when a smaller flow rate is required for calibration, such as to verify the minimum flow rate or cutoff flow rate of the water meter, fifth valve 55 can be closed, allowing water to bypass the section of pipe where fifth valve 55 is located and flow through the smaller diameter fourth branch line 15. When a larger flow rate is required for calibration, such as to verify the meter's normal flow rate, fifth valve 55 can be opened to add a new flow path and further reduce pressure loss.

[0071] like Figure 1 As shown, a third measurement standard meter 23 may be connected in series to the fourth branch line 15. The third measurement standard meter 23 can calibrate the flow in the fourth branch line 15 so as to more accurately calibrate the flow of the water meter to be tested.

[0072] As an example, if the diameter of the fourth branch line 15 is smaller than that of the main line 11, the accuracy of the third standard meter 23 can be higher than that of the first standard meter 21. When the fifth valve 55 is closed and a smaller flow rate is used to verify the minimum flow rate or the cutoff flow rate, water flows through the smaller diameter fourth branch line 15, and the more accurate fourth standard meter 24 is used to verify the flow rate, thereby improving the verification accuracy of the water meter to be tested.

[0073] like Figure 1 As shown, a second flexible joint 551 may be connected to one end of the fifth valve 55 , and a third flexible joint 151 may be connected in series in the fourth branch line 15 .

[0074] like Figure 1As shown, a sixth valve 56 and a seventh valve 57 can be connected in series to the main line 11. The seventh valve 57 is close to the drain outlet of the main line 11, and the sixth valve 56 is located at the end of the seventh valve 57 away from the drain outlet of the main line 11.

[0075] In this example, the first valve 51 , the second valve 52 , the third valve 53 , the fourth valve 54 , and the fifth valve 55 may all be on-off ball valves, the sixth valve 56 may be a control ball valve, and the seventh valve 57 may be an on-off butterfly valve.

[0076] like Figure 1 As shown, the water meter verification device may further include a plurality of pipe supports 101 , which are sequentially arranged along the main line 11 to support the main line 11 .

[0077] like Figure 1 As shown, the wall of the main line 11 may further have a water outlet 11a, located between the sixth valve 56 and the seventh valve 57. The water outlet 11a may be connected to a water outlet pipe, which may be arranged at an angle so that its height is higher than the drain outlet of the main line 11. With the water outlet 11a, the seventh valve 57 may be closed during the calibration process. This allows the height of the water outlet pipe to maintain a certain water pressure within the main line 11 during the calibration process. After the calibration is completed, the seventh valve 57 is opened to drain the water within the main line 11.

[0078] Figure 2 This is a schematic diagram of the structure of a water meter calibration device provided in an embodiment of the present application. Figure 2 As shown, the water meter verification device includes two verification assemblies 100 , and the main pipes 11 of different verification assemblies 100 have different pipe diameters. In other examples, the water meter verification device may further include a greater number of verification assemblies 100 .

[0079] By providing two verification assemblies 100 with different diameters of the main line 11, it is possible to adapt to the verification of water meters of different specifications. Providing multiple verification assemblies 100 can increase the number of water meters that can be verified, further improving the verification efficiency.

[0080] like Figure 2 As shown, the main lines 11 of different verification assemblies 100 can be connected, and the main lines 11 of different verification assemblies 100 share a water inlet, so that water can be supplied to multiple main lines 11 through a water pump.

[0081] The following Figure 1 The water meter calibration device shown is used as an example to illustrate the calibration of a water meter. It should be noted that there may be multiple different calibration methods using the water meter calibration device, and the steps of different calibration methods may vary to a certain extent. The following is only an example.

[0082] Install the water meters to be inspected at the first water meter installation position 41, the second water meter installation position 42, and the third water meter installation position 43, respectively, and clamp them with the first meter clamp 31, the second meter clamp 32, and the third meter clamp 33. Close the first valve 51, the second valve 52, the fourth valve 54, and the fifth valve 55, and open the third valve 53, the sixth valve 56, and the seventh valve 57.

[0083] The main line 11 has opposite ends, one end of which has a water inlet and the other end of which has a drain. A water pump delivers water at a first preset flow rate to the water inlet of the main line 11, causing the water to flow through the water meter to be inspected in the third water meter installation position 43, the water meter to be inspected in the first water meter installation position 41, and the water meter to be inspected in the second water meter installation position 42 for 30 minutes. The flow rate values ​​of the first measurement standard meter 21, the second measurement standard meter 22, the third measurement standard meter 23, the fourth measurement standard meter 24, and each of the water meters to be inspected are recorded. The minimum flow rate and the cutoff flow rate of each of the water meters to be inspected are then calibrated based on the recorded flow rate values.

[0084] Open the first valve 51, the second valve 52, the fourth valve 54, the fifth valve 55, the sixth valve 56 and the seventh valve 57, close the third valve 53, increase the flow rate of the water pump to the second preset flow rate, so that the water can flow through the first branch pipeline 12 and the second branch pipeline 13, for 10 minutes, record the flow values ​​of the first measurement standard table 21, the third measurement standard table 23 and the water meter to be inspected located at the third water meter installation position 43, and calibrate the common flow rate of the water meter to be inspected located at the third water meter installation position 43 according to the recorded flow values; open the third valve 53, close the first valve 51, so that the water can flow through the second branch pipeline 13, for 10 minutes 10 minutes, record the flow values ​​of the first measurement standard meter 21, the third measurement standard meter 23 and the water meter to be inspected located at the first water meter installation position 41, and calibrate the common flow of the water meter to be inspected located at the first water meter installation position 41 according to the recorded flow values; open the first valve 51, close the second valve 52 and the third valve 53, so that water can flow through the first branch pipeline 12, and continue for 10 minutes, record the flow values ​​of the first measurement standard meter 21, the third measurement standard meter 23 and the water meter to be inspected located at the second water meter installation position 42, and calibrate the common flow of the water meter to be inspected located at the second water meter installation position 42 according to the recorded flow values.

[0085] The above-described embodiments are only used to illustrate the technical solutions of the present application, rather than to limit them. Although the present application has been described in detail with reference to the aforementioned embodiments, those skilled in the art should understand that they can still modify the technical solutions described in the aforementioned embodiments, or make equivalent replacements for some of the technical features therein. These modifications or replacements do not deviate the essence of the corresponding technical solutions from the spirit and scope of the technical solutions of the various embodiments of the present application, and should all be included in the scope of protection of the present application.

Claims

1. A water meter calibration device, characterized in that: The invention comprises a verification component (100), wherein the verification component (100) comprises a main line (11) and the following components connected in series in the main line (11): First measurement standard table (21); a first meter clamp (31), wherein the main line (11) has at least one first water meter installation position (41) between the first meter standard meter (21) and the first meter clamp (31); A second meter clamp (32), the main line (11) having at least one second water meter installation position (42) between the second meter clamp (32) and the first meter clamp (31); The verification assembly (100) further includes a first branch line (12) and a second branch line (13) connected to the main line (11), wherein a first end of the first branch line (12) is connected between the first meter standard meter (21) and the first water meter installation position (41), and a second end is connected between the first meter clamp (31) and the second water meter installation position (42); a first end of the second branch line (13) is connected between the first meter clamp (31) and the second water meter installation position (42), and a second end is connected to an end of the second meter clamp (32) away from the second water meter installation position (42); a first valve (51) is connected in series to the first branch line (12), and a second valve (52) is connected in series to the second branch line (13); The verification assembly (100) further includes a fourth valve (54), a third branch line (14) and a second metering standard meter (22), wherein the fourth valve (54) is connected in series to the main line (11) and is located between the first metering standard meter (21) and the first water meter installation position (41), and the connection point between the first end of the first branch line (12) and the main line (11) is located between the fourth valve (54) and the first water meter installation position (41); One end of the third branch line (14) is connected to one end of the fourth valve (54), and the other end is connected to the other end of the fourth valve (54). The diameter of the third branch line (14) is different from that of the main line (11); The second metering standard meter (22) is connected in series to the third branch line (14), and the main line (11) is also connected in series to a third metering standard meter (23). The third metering standard meter (23) is located at an end of the second meter clamp (32) away from the second water meter installation position (42).

2. The water meter calibration device according to claim 1, characterized in that: The diameter of at least one of the first branch pipeline (12) and the second branch pipeline (13) is larger than the diameter of the main pipeline (11).

3. The water meter calibration device according to claim 2, characterized in that: The diameter of the first branch pipeline (12) and the diameter of the second branch pipeline (13) are the same, and both are at least twice the diameter of the main pipeline (11).

4. The water meter calibration device according to claim 1, characterized in that: The verification assembly (100) further comprises a three-way pipe joint (61), and the second end of the first branch line (12) and the first end of the second branch line (13) are connected to the main line (11) via the three-way pipe joint (61).

5. The water meter calibration device according to claim 4, characterized in that: The main line (11) is further connected in series with at least one of the following: The third valve (53) is connected in series between the first metering standard meter (21) and the first water meter installation position (41), and the connection point between the first end of the first branch line (12) and the main line (11) is located between the first metering standard meter (21) and the third valve (53).

6. The water meter calibration device according to claim 1, characterized in that: The main line (11) is further connected in series with a third meter clamp (33), and is connected in series between the first measurement standard meter (21) and the first water meter installation position (41); the connection between the first end of the first branch line (12) and the main line (11) is located between the third meter clamp (33) and the first water meter installation position (41); the main line (11) also has at least one third water meter installation position (43), and the third water meter installation position (43) is located between the first measurement standard meter (21) and the third meter clamp (33).

7. The water meter calibration device according to any one of claims 1 to 6, characterized in that: The water meter calibration device comprises at least two calibration components (100), and the main pipes (11) of different calibration components (100) have different pipe diameters.

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