Calibration device for online inspection of water meter

Abstract

The utility model discloses a calibration device for on-line inspection of a water meter, which comprises a detected water meter unit and a main standard unit for collecting water flowing through the detected water meter, the water outlet end of the detected water meter unit is connected with the main standard unit through a matched connecting unit, and the matched connecting unit is detachably connected with the main standard unit. And the matched connecting unit is detachably connected with the water outlet end of the detected water meter unit. The standard metal meter is reasonable in structural design, water flowing through the water meter unit to be detected enters the main standard unit through the matched connecting unit through the matched connecting unit and the main standard unit, and the volume increment of the water meter and the volume of water collected in the standard metal meter are compared within the same time. The indicating value error of the water meter is calculated according to the formula (volume increment of the water meter-volume of water collected in the standard metal measuring vessel) / volume of water collected in the standard metal measuring vessel), and the indicating value error of the detected water meter unit can be simply and quickly detected without being disassembled and sent to a laboratory.

Description

Technical Field

[0001] This utility model relates to the field of water meter measurement, and in particular to a calibration device for online inspection of water meters. Background Technology

[0002] With the continuous advancement of policies such as urbanization, one meter per household, three supplies and one service, and rural drinking water renovation, the number of water meters in use has continued to rise. Over the course of several years (the service life of cold water meters used in residential households is 6 years), water meters inevitably experience measurement inaccuracies. When either the homeowner or the water company questions the continued accuracy of the water meter, the common method is to disassemble the water meter and send it to a laboratory for testing to confirm its measurement performance. This can cause some inconvenience to residents' lives and water bill settlement.

[0003] Therefore, once this type of water meter is installed, it is generally not recommended to disassemble it unless there is a malfunction or it is being rotated. There is a need for a device and method that can perform metering performance checks on-site without disassembling the water meter, for use in checking the metering performance of the water meter during its use. Utility Model Content

[0004] The technical problem to be solved by this invention is to provide a calibration device for online inspection of water meters, in light of the current state of the technology.

[0005] The technical solution adopted by this utility model to solve the above-mentioned technical problems is as follows: a calibration device for online inspection of water meters, including a water meter unit under test, and a main standard unit for collecting water flowing through the water meter under test. The water outlet of the water meter unit under test and the main standard unit are connected by a matching connection unit. The matching connection unit and the main standard unit are detachably connected. The matching connection unit and the water outlet of the water meter unit under test are detachably connected.

[0006] Preferably, the main standard unit includes a standard metal measuring instrument, the capacity of which matches the diameter of the water meter unit under test and the relevant technical specifications, and the uncertainty of the standard metal measuring instrument is no greater than 0.2%.

[0007] Preferably, the matching connection unit includes an inlet quick connector and a flow indicator for measuring and indicating the flow rate value. The inlet quick connector and the outlet of the water meter unit under test are detachably connected. The inlet quick connector and the flow indicator are connected through a first pipe. The outlet of the flow indicator is connected to a second pipe, and the other end of the second pipe is aligned with the inlet of a standard metal measuring instrument.

[0008] Preferably, the second pipeline is respectively connected to a pressure indicator for measuring and indicating water pressure, a water thermometer for measuring and indicating water temperature, and a flow control valve for adjusting and controlling to achieve the expected test flow rate.

[0009] Preferably, the first pipe is provided with a fixed bracket, and the matching connecting unit and the standard metal measuring instrument are detachably connected through the fixed bracket. One end of the fixed bracket is fixedly connected to the first pipe by bolts or clamps, and the other end of the fixed bracket is fixedly connected to the standard metal measuring instrument by bolts or clamps.

[0010] Preferably, the standard metal measuring instrument has at least three support feet at the bottom for support, and the bottom of the standard metal measuring instrument also has a drain outlet for drainage, the drain outlet is equipped with a drain valve, and the drain outlet is connected to the interior of the standard metal measuring instrument.

[0011] Preferably, the capacity of the main standard unit and the specifications of the matching connection unit are matched with the diameter of the water meter unit under test and the relevant technical specifications.

[0012] Compared with the prior art, the advantages of this utility model are as follows: Through the matching connection unit and the main standard unit, the water flowing through the water meter unit under test enters the main standard unit through the matching connection unit. The volume increment of the water meter unit under test and the volume of water collected in the standard metal measuring vessel are compared within the same time period. The indication error of the water meter is calculated according to the formula "(volume increment of the water meter unit under test - volume of water collected in the standard metal measuring vessel) / volume of water collected in the standard metal measuring vessel". The indication error of the water meter unit under test can be checked simply and quickly without disassembly and sending it to the laboratory. The structure is simple, with few parts, convenient operation, and easy disassembly and assembly, which is conducive to the promotion and application of this technology. Attached Figure Description

[0013] Figure 1 It is a structural diagram of the present utility model.

[0014] Reference numerals in the attached diagram: 1. Standard metal measuring instrument; 2. Quick connector for water inlet; 3. Flow indicator; 4. First pipe; 5. Second pipe; 6. Pressure indicator; 7. Water thermometer; 8. Flow control valve; 9. Fixed bracket; 10. Support foot; 11. Drain outlet. Detailed Implementation

[0015] The following drawings will disclose several embodiments of this utility model. For clarity, many practical details will be described in the following description. However, it should be understood that these practical details should not be used to limit this utility model. That is, in some embodiments of this utility model, these practical details are not essential. In addition, for the sake of simplicity, some conventional structures and components will be shown in the drawings in a simple schematic manner.

[0016] It should be noted that all directional indicators in this utility model embodiment, such as up, down, left, right, front, back, etc., are only used to explain the relative positional relationship and movement of each component in a certain specific posture (as shown in the figure). If the specific posture changes, the directional indicator will also change accordingly.

[0017] Furthermore, in addition to indicating orientation or positional relationship, the aforementioned terms may also be used to indicate other meanings. For example, the term "above" may also be used in some cases to indicate a certain dependency or connection relationship. For those skilled in the art, the specific meaning of these terms in this utility model can be understood according to the specific circumstances.

[0018] Furthermore, the terms "installation," "setting," "equipped with," "connection," "linking," and "socketing" should be interpreted broadly. For example, they can refer to fixed connections, detachable connections, or integral structures; they can refer to mechanical connections or electrical connections; they can refer to direct connections or indirect connections through an intermediate medium, or internal connections between two devices, components, or parts. The connection methods described herein are existing technologies without any modifications and are common knowledge to those skilled in the art. Those skilled in the art can understand the specific meaning of the above terms in this utility model based on the specific circumstances.

[0019] Furthermore, in this utility model, the use of terms such as "first" and "second" is for descriptive purposes only and does not specifically refer to any order or sequence, nor is it intended to limit the utility model. They are merely used to distinguish components or operations described with the same technical terms and should not be construed as indicating or implying their relative importance or implicitly specifying the number of indicated technical features. Therefore, a feature defined with "first" or "second" may explicitly or implicitly include at least one of those features. Additionally, the technical solutions of various embodiments can be combined with each other, but only if they are feasible for those skilled in the art. If a combination of technical solutions is contradictory or impossible to implement, it should be considered that such a combination of technical solutions does not exist and is not within the scope of protection claimed by this utility model.

[0020] like Figure 1 As shown, this utility model provides a calibration device for online inspection of water meters, including a water meter unit under test and a main standard unit for collecting water flowing through the water meter under test; specifically, the water outlet of the water meter unit under test and the main standard unit are connected by a matching connection unit, the matching connection unit and the main standard unit are detachably connected, and the matching connection unit and the water outlet of the water meter unit under test are detachably connected.

[0021] The main standard unit includes a standard metal measuring instrument 1. The capacity of the standard metal measuring instrument 1 matches the diameter of the water meter unit under test and the relevant technical specifications. The uncertainty of the standard metal measuring instrument 1 is no greater than 0.2%, and it is traceable to public metrological standards and has obtained a verification certificate issued by a national statutory metrological verification institution. Specifically, the volume increment of the water meter unit under test and the volume of water collected in the standard metal measuring instrument 1 are compared within the same time period. The indication error of the water meter is calculated according to the formula "(volume increment of the water meter unit under test - volume of water collected in the standard metal measuring instrument 1) / volume of water collected in the standard metal measuring instrument 1".

[0022] The matching connection unit includes an inlet quick connector 2 and a flow indicator 3 for measuring and indicating the flow rate. The inlet quick connector 2 and the outlet end of the water meter unit under test are detachably connected. The inlet quick connector 2 is used to quickly and conveniently connect to the outlet end of the water meter unit under test. Specifically, the inlet quick connector 2 and the flow indicator 3 are connected through a first pipe 4. The outlet end of the flow indicator 3 is connected to a second pipe 5, and the other end of the second pipe 5 is aligned with the inlet end of the standard metal measuring instrument 1.

[0023] The second pipeline 5 is respectively connected to a pressure indicator 6 for measuring and indicating water pressure, a water thermometer 7 for measuring and indicating water temperature, and a flow control valve 8 for adjusting and controlling to achieve the expected test flow rate. The unit of the flow indicator 3 is m³ / h, the unit of the pressure indicator 6 is MPa, and the unit of the water thermometer 7 is ℃.

[0024] The first pipe 4 is provided with a fixed bracket 9, and the matching connection unit and the standard metal measuring instrument 1 are detachably connected through the fixed bracket 9. Specifically, one end of the fixed bracket 9 is fixedly connected to the first pipe 4 by bolts or clamps, and the other end of the fixed bracket 9 is fixedly connected to the standard metal measuring instrument 1 by bolts or clamps. Various combinations of main standard instrument units of different capacities and matching connection units of different diameters can be made as needed.

[0025] The standard metal measuring instrument 1 is provided with at least three support feet 10 at the bottom for support, and the standard metal measuring instrument 1 is also provided with a drain outlet 11 for drainage. The drain outlet 11 is provided with a drain valve and is connected to the interior of the standard metal measuring instrument 1.

[0026] The capacity of the main standard unit and the specifications of the matching connection unit are matched with the diameter of the water meter unit under test and the relevant technical specifications. According to the requirements of the online test flow rate and minimum water consumption of the water meter unit under test, standard metal measuring instruments 1 of different capacities and pipes and flow indicators 3 of different diameters can be selected for combination. The online inspection process is safe, efficient and fast, and has a wide range of applications.

[0027] The working principle of this utility model is as follows: connect the quick connector 2 at the inlet to the outlet end of the water meter unit under test, and connect and fix the matching connecting unit and the standard metal measuring instrument 1 through the fixed bracket 9. One end of the fixed bracket 9 is fixedly connected to the first pipe 4 through bolts or clamps, and the other end of the fixed bracket 9 is fixedly connected to the standard metal measuring instrument 1 through bolts or clamps. At this time, the outlet end of the second pipe 5 is aligned with the inlet end of the standard metal measuring instrument 1.

[0028] After the water supply is started, the water flowing through the tested water meter unit flows out from the outlet end of the tested water meter unit, enters the first pipe 4 through the inlet quick connector 2, and then enters the second pipe 5 through the flow indicator 3. In the second pipe 5, it passes through the pressure indicator 6, the water thermometer 7 and the flow control valve 8 respectively, and finally enters the standard metal measuring vessel 1. The user calculates the water meter indication error by comparing the volume increase of the tested water meter unit and the volume of water collected in the standard metal measuring vessel 1 within the same time period, according to the formula "(volume increase of the tested water meter unit - volume of water collected in the standard metal measuring vessel 1) / volume of water collected in the standard metal measuring vessel 1".

[0029] After the test is completed, the water in the standard metal measuring vessel 1 is drained through the drain outlet 11.

[0030] The advantages of this invention are as follows: Through the matching connecting unit and the main standard unit, the water flowing through the water meter unit under test enters the main standard unit through the matching connecting unit. The volume increment of the water meter unit under test and the volume of water collected in the standard metal measuring vessel 1 are compared within the same time period. The indication error of the water meter is calculated according to the formula "(volume increment of the water meter unit under test - volume of water collected in the standard metal measuring vessel 1) / volume of water collected in the standard metal measuring vessel 1". The indication error of the water meter unit under test can be checked simply and quickly without disassembly and sending it to the laboratory. The structure is simple, with few parts, convenient operation, and easy disassembly and assembly, which is conducive to the promotion and application of this technology.

[0031] In the description of this specification, the references to terms such as "one embodiment," "some embodiments," "example," "specific example," or "some examples," etc., indicate that a specific feature, structure, material, or characteristic described in connection with that embodiment or example is included in at least one embodiment or example of the present invention. In this specification, the illustrative expressions 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 one or more embodiments or examples. Moreover, without contradiction, those skilled in the art can combine and integrate the different embodiments or examples described in this specification, as well as the features of different embodiments or examples.

[0032] All standard parts used in this invention can be purchased from the market, and irregular parts can be customized according to the description and drawings. The specific connection methods of each part adopt conventional methods such as bolts, rivets, welding, and bonding that are mature in the existing technology, and will not be described in detail here.

[0033] The above description is only a preferred embodiment of this utility model. For those skilled in the art, various modifications and variations can be made in the specific implementation and application scope based on the idea of ​​this utility model. The content of this specification should not be construed as a limitation of this utility model. Any modifications, equivalent substitutions, improvements, etc. made within the spirit and principle of this utility model should be included within the scope of the claims of this utility model.

Claims

1. A calibration device for online inspection of water meters, comprising a water meter unit under test, characterized in that: It also includes a main standard unit for collecting water flowing through the water meter being calibrated. The water outlet of the water meter under test and the main standard unit are connected by a matching connection unit. The matching connection unit and the main standard unit are detachably connected, and the matching connection unit and the water outlet of the water meter under test are detachably connected.

2. The calibration device for online inspection of water meters according to claim 1, characterized in that: The main standard unit includes a standard metal measuring instrument. The capacity of the standard metal measuring instrument matches the diameter of the water meter unit under test and the relevant technical specifications. The uncertainty of the standard metal measuring instrument is no greater than 0.2%.

3. The calibration device for online inspection of water meters according to claim 2, characterized in that: The matching connection unit includes an inlet quick connector and a flow indicator for measuring and indicating the flow rate. The inlet quick connector and the outlet of the water meter unit under test are detachably connected. The inlet quick connector and the flow indicator are connected through a first pipe. The outlet of the flow indicator is connected to a second pipe, and the other end of the second pipe is aligned with the inlet of a standard metal measuring instrument.

4. The calibration device for online inspection of water meters according to claim 3, characterized in that: The second pipeline is respectively connected to a pressure indicator for measuring and indicating water pressure, a water thermometer for measuring and indicating water temperature, and a flow control valve for adjusting and controlling to achieve the expected test flow rate.

5. A calibration device for online inspection of water meters according to claim 3, characterized in that: The first pipe is equipped with a fixed bracket, and the matching connecting unit and the standard metal measuring instrument are detachably connected through the fixed bracket. One end of the fixed bracket is fixedly connected to the first pipe by bolts or clamps, and the other end of the fixed bracket is fixedly connected to the standard metal measuring instrument by bolts or clamps.

6. A calibration device for online inspection of water meters according to claim 2, characterized in that: The standard metal measuring instrument has at least three support feet at the bottom for support, and a drain outlet at the bottom for drainage. The drain outlet is equipped with a drain valve and is connected to the interior of the standard metal measuring instrument.

7. A calibration device for online inspection of water meters according to claim 1, characterized in that: The capacity of the main standard unit and the specifications of the matching connection unit are matched with the diameter of the water meter unit under test and the relevant technical specifications.

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