Volume correction instrument and flow meter

Abstract

The utility model provides a volume correction instrument and a flow meter, and relates to the technical field of detection. The volume correction instrument comprises a box body, a cover plate, a circuit board and a power supply part. The circuit board and the power supply part are arranged in the box body, so that the box body can protect the circuit board and the power supply part. The power supply part is electrically connected with the circuit board so that the power supply part can supply power to the circuit board. When the power supply part needs to be replaced, the cover plate can be detached to expose the first pick-and-place opening, so that the power supply part is exposed, and the power supply part is detached from the box body through the first pick-and-place opening. The first cavity and the second cavity of the box body are separated from each other, so that the power supply part arranged in the first cavity can be separated from the circuit board arranged in the second cavity. In this way, when the first pick-and-place opening is opened, the circuit board is still located in the second cavity of the box body, the circuit board can be prevented from being exposed, the risk that the circuit board is replaced and damaged can be avoided, and the volume correction instrument can still be directly and continuously used after the battery is replaced.

Description

Technical Field

[0001] This application relates to a volume corrector and a flow meter, belonging to the field of detection technology. Background Technology

[0002] An ultrasonic flow meter is a type of flow meter developed based on the principle that the propagation speed of ultrasonic waves in a flowing medium is equal to the vector sum of the average velocity of the measured medium and the velocity of the sound wave in a stationary medium. It mainly consists of a transducer and a converter, and comes in different types, including Doppler method, velocity difference method, beam deflection method, noise method, and correlation method. The signal detected by the ultrasonic flow meter's sensor needs to be transmitted to a correction device for correction calculations to obtain the specific detection value.

[0003] Currently, when replacing the battery of a corrector, the lead seal of the corrector needs to be broken to disassemble the corrector, which exposes the internal metering components. This poses a risk of replacing or damaging the metering components, violating the corrector's usage specifications. Consequently, the corrector needs to be recertified before it can be used, making the battery replacement process complicated and inconvenient. Utility Model Content

[0004] This application provides a volume corrector that solves the problem of inconvenient battery replacement in related technologies.

[0005] In a first aspect, this application provides a volume correction device, comprising:

[0006] The box has a first cavity, a second cavity, and a first opening for taking out and putting in; the first cavity is separated from the second cavity, and the first opening for taking out and putting in is connected to the first cavity.

[0007] A cover plate is detachably mounted on the first loading / unloading port;

[0008] A circuit board is disposed in the second cavity;

[0009] A power supply component is disposed in the first cavity and electrically connected to the circuit board.

[0010] In some embodiments, the housing includes a first shell portion and a second shell portion, the first cavity and the first loading / unloading port are located in the first shell portion, the second cavity is located in the second shell portion, the second shell portion has a second loading / unloading port communicating with the second cavity, and the first shell portion is detachably sealed to the second loading / unloading port.

[0011] In some embodiments, the first pick-up and drop-off port is located on the side of the first shell portion facing away from the second shell portion, and the second pick-up and drop-off port is located on the side of the second shell portion facing the first shell portion.

[0012] In some embodiments, the volume corrector further includes a sensor connector that passes through the first housing portion, with one end of the sensor connector located in the first cavity and the other end located outside the first cavity. The sensor connector can be electrically connected to the circuit board.

[0013] In some embodiments, the volume corrector further includes a conductive element, the first housing portion having a connecting hole that connects the first cavity and the second cavity, the conductive element passing through the connecting hole so that the conductive element is located inside the housing, and the circuit board being electrically connected to the power supply component and the sensor connector through the conductive element.

[0014] In some embodiments, the power supply unit includes a battery and a battery compartment housing, the battery being embedded in the battery compartment housing and electrically connected to the circuit board, and the battery compartment housing being detachably connected to the inner wall of the housing located in the second cavity.

[0015] In some embodiments, the volume corrector further includes a connector that passes through the cover plate and the battery compartment shell, and the connector is connected to the first shell portion.

[0016] In some embodiments, the volume corrector further includes a sealing ring that is sealed between the cover plate and the first housing portion.

[0017] In some embodiments, the volume corrector further includes lead seals connected to the first housing portion and the second housing portion, respectively.

[0018] Secondly, based on the volume corrector described above, this application also proposes a flow meter, including a flow meter body and the aforementioned volume corrector, wherein the circuit board is electrically connected to the flow meter body.

[0019] In the volume corrector provided in this application, the circuit board and power supply component are housed within a housing, protecting them. The power supply component is electrically connected to the circuit board, enabling it to supply power. When the power supply component needs replacement, the cover can be removed to expose the first access port, allowing the power supply component to be removed from the housing through this port. The first and second cavities of the housing are separated, separating the power supply component in the first cavity from the circuit board in the second cavity. Thus, when the first access port is opened, the circuit board remains within the second cavity, preventing exposure and mitigating the risk of replacement or damage. This allows the volume corrector to continue operating directly after battery replacement.

[0020] The flow meter provided in this application includes the aforementioned volume corrector, making flow meter maintenance more convenient and efficient. Attached Figure Description

[0021] The above and other objects, features, and advantages of embodiments of this application will become more readily understood through the following detailed description with reference to the accompanying drawings. In the drawings, several embodiments of this application will be described by way of example and non-limitation, wherein:

[0022] Figure 1 This is a schematic diagram of the volume corrector according to an embodiment of this application;

[0023] Figure 2 This is a schematic diagram of the structure of the first cavity of the volume correction device according to an embodiment of this application;

[0024] Figure 3 This is a schematic diagram of the second cavity of the volume corrector according to an embodiment of this application;

[0025] Figure 4 This is an exploded structural diagram of the volume corrector according to an embodiment of this application.

[0026] Figure label:

[0027] 100 - Box body, 110 - Inner cavity, 120 - First shell part, 121 - First cavity, 122 - First loading / unloading port, 123 - Communicating hole, 130 - Second shell part, 131 - Second cavity, 132 - Second loading / unloading port, 140 - Sealing ring, 150 - Lead seal.

[0028] 200 - Cover plate, 210 - Connector

[0029] 310 - Circuit board, 320 - Power supply component, 321 - Battery, 322 - Battery compartment housing, 323 - Battery cavity, 330 - Sensor connector. Detailed Implementation

[0030] The embodiments of this application are described in detail below. Examples of these embodiments are shown in the accompanying drawings, wherein the same or similar reference numerals denote the same or similar elements or elements having the same or similar functions throughout. The embodiments described below with reference to the accompanying drawings are exemplary and intended to explain this application, and should not be construed as limiting this application.

[0031] In the description of this application, it should be understood that the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", "axial", "radial", "circumferential", etc., indicating the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings, 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, or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of this application.

[0032] Furthermore, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include at least one of that feature. In the description of this application, "multiple" means at least two, such as two, three, etc., unless otherwise explicitly specified.

[0033] In this application, unless otherwise expressly specified and limited, the terms "installation," "connection," "linking," and "fixing," etc., should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral part; they can refer to a mechanical connection, an electrical connection, or a connection that allows communication between components; they can refer to a direct connection or an indirect connection through an intermediate medium; they can refer to the internal communication of two components or the interaction between two components, unless otherwise expressly limited. Those skilled in the art can understand the specific meaning of the above terms in this application based on the specific circumstances.

[0034] In this application, unless otherwise expressly specified and limited, "above" or "below" the second feature can mean that the first feature is in direct contact with the second feature, or that the first feature is in indirect contact with the second feature through an intermediate medium. Furthermore, "above," "on top of," and "over" the second feature can mean that the first feature is directly above or diagonally above the second feature, or simply that the first feature is at a higher horizontal level than the second feature. "Below," "below," and "under" the second feature can mean that the first feature is directly below or diagonally below the second feature, or simply that the first feature is at a lower horizontal level than the second feature.

[0035] In the description of this specification, the references to terms such as "one embodiment," "some embodiments," "example," "specific example," or "some examples," etc., refer to specific features, structures, materials, or characteristics described in connection with that embodiment or example, which are included in at least one embodiment or example of this application. 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.

[0036] An ultrasonic flow meter is a type of flow meter developed based on the principle that the propagation speed of ultrasonic waves in a flowing medium is equal to the vector sum of the average velocity of the measured medium and the velocity of the sound wave in a stationary medium. It mainly consists of a transducer and a converter, and comes in different types, including Doppler method, velocity difference method, beam deflection method, noise method, and correlation method. The signal detected by the ultrasonic flow meter's sensor needs to be transmitted to a correction device for correction calculations to obtain the specific detection value.

[0037] Currently, the battery of the corrector is located inside the corrector's casing. Replacing the battery requires breaking the lead seal of the corrector to disassemble it, which exposes the internal measuring components. This poses a risk of replacing or damaging the measuring components, violating the corrector's usage specifications. Consequently, the corrector needs to be recertified before it can be used, making the battery replacement process complicated and inconvenient.

[0038] In the volume corrector proposed in this application, the circuit board and power supply component are housed within a housing, protecting both components. The power supply component is electrically connected to the circuit board, enabling it to supply power. When the power supply component needs replacement, the cover can be removed to expose the first access port, allowing the power supply component to be removed from the housing through this port. The first and second cavities of the housing are separated, isolating the power supply component in the first cavity from the circuit board in the second cavity. Thus, when the first access port is opened, the circuit board remains within the second cavity, preventing exposure and mitigating the risk of replacement or damage. This allows the volume corrector to continue operating directly after battery replacement.

[0039] The flow meter proposed in this application includes the aforementioned volume corrector, making flow meter maintenance more convenient and efficient.

[0040] The volume corrector and flow meter provided in this application will be described in detail below with reference to specific embodiments.

[0041] This application proposes a volume correction device, with reference to... Figure 1 and Figure 2 As shown, it includes a housing 100, a cover plate 200, a circuit board 310, and a power supply unit 320. This volume corrector can be applied to flow meters.

[0042] The housing 100 is the basic component of the volume corrector of this application. The housing 100 provides a mounting base for at least some of the other components of the volume corrector and serves to protect them. The housing 100 can be made of metal, giving it better structural strength, thus improving its durability and reliability. Alternatively, the housing 100 can be made of polymer materials, allowing it to maintain a certain structural strength while remaining relatively lightweight.

[0043] The box body 100 has an inner cavity 110, which is a hollow structure within the box body 100. The inner cavity 110 includes a first cavity 121 and a second cavity 131 that are separated from each other. The first cavity 121 and the second cavity 131 are separated by a partition structure within the box body 100, making the first cavity 121 and the second cavity 131 independent of each other. The box body 100 also has a first access port 122, which can be located on the surface of the box body 100. The first access port 122 communicates with the first cavity 121, so that the external environment communicating with the first access port 122 is also communicating with the first cavity 121.

[0044] A cover plate 200 is detachably disposed at the first access port 122 of the housing 100, so that when the cover plate 200 is connected to the housing 100, it can block the first access port 122, thereby enclosing the first cavity 121 between the housing 100 and the cover plate 200. A power supply component 320 is disposed in the first cavity 121, and a circuit board 310 is disposed in the second cavity 131, and the power supply component 320 is electrically connected to the circuit board 310, so that the power supply component 320 can supply power to the circuit board 310. The circuit board 310 can also be electrically connected to the flow meter body of the flow meter, so that the signal detected by the sensor of the flow meter body can be transmitted to the circuit board 310, and the circuit board 310 can calculate the actual flow rate, temperature, pressure, etc. based on the electrical signal transmitted by the flow meter body.

[0045] The power supply component 320 and the circuit board 310 are respectively disposed in the first cavity 121 and the second cavity 131, allowing the power supply component 320 and the circuit board 310 to be separated. When it is necessary to disassemble and replace the power supply component 320, the cover plate 200 can be separated from the housing 100, allowing the first access port 122 of the housing 100 to be opened, thus allowing the power supply component 320 to be taken out or placed in the first cavity 121 through the first access port 122. Since the first cavity 121 and the second cavity 131 are separated, the second cavity 131 remains closed when the first cavity 121 is exposed, ensuring that the circuit board 310 in the second cavity 131 will not be replaced or damaged. After the power supply component 320 is repaired or replaced, the cover plate 200 can be reinstalled in the housing 100 to seal the first access port 122, and the volume correction instrument of this application can continue to be used without re-testing and certification, improving the convenience of testing and maintenance of the volume correction instrument.

[0046] In some implementations, reference Figures 1 to 3 As shown, in order to form a first cavity 121 and a second cavity 131 separated from each other within the housing 100 of this application, the housing 100 may be provided with a first shell portion 120 and a second shell portion 130. The first cavity 121 is located within the first shell portion 120, and the first access port 122 is also located within the first shell portion 120, specifically on the surface of the first shell portion 120, allowing the cover plate 200 to be detachably connected to the first shell portion 120. The power supply component 320 is disposed within the first cavity 121. When it is necessary to disassemble and replace the power supply component 320, the cover plate 200 can be separated from the first shell portion 120, allowing the first access port 122 of the first shell portion 120 to be opened, thus enabling the power supply component 320 to be taken out or placed from the first cavity 121 through the first access port 122.

[0047] The second cavity 131 is disposed within the second housing portion 130, and correspondingly, the circuit board 310 is disposed within the second housing portion 130. The second housing portion 130 also has a second access port 132, which can be located on the surface of the second housing portion 130. The second access port 132 communicates with the second cavity 131, so that the external environment communicating with the second access port 132 is also communicating with the second cavity 131. The first housing portion 120 is detachably disposed at the second access port 132 of the second housing portion 130, so that when the second housing portion 130 is connected to the first housing portion 120, the first housing portion 120 can block the second access port 132, thereby enclosing the second cavity 131 between the first housing portion 120 and the second housing portion 130.

[0048] When it is necessary to replace or repair the power supply component 320, the cover plate 200 is removed from the first access port 122 of the first housing 120, exposing the power supply component 320. The outer wall of the first housing 120 blocks the second access port 132 of the second housing 130, preventing the circuit board 310 from being exposed and avoiding the risk of the circuit board 310 being replaced or damaged. When it is determined that the circuit board 310 needs to be replaced or repaired, the first housing 120 and the second housing 130 can be separated, exposing the second access port 132 of the second housing 130. In this way, the circuit board 310 can be taken out or placed from the second cavity 131 of the second housing 130 through the second access port 132.

[0049] In some implementations, reference Figure 1 As shown, to make the structure of the volume corrector of this application more compact, the first pick-up and drop-out port 122 can be provided on the side of the first shell 120 facing away from the second shell 130, and the second pick-up and drop-out port 132 is located on the side of the second shell 130 facing the first shell 120, so that the first pick-up and drop-out port 122 and the second pick-up and drop-out port 132 have the same orientation. In this way, the first shell 120 and the second shell 130 can be stacked, making the structure of the volume corrector of this application more compact.

[0050] Specifically, both the first shell portion 120 and the second shell portion 130 can be configured as a rectangular structure, and the length and width dimensions of the first shell portion 120 and the second shell portion 130 can be set to be similar. By stacking the first shell portion 120 and the second shell portion 130, the size of the box 100 in one direction can be avoided to be too large, thereby making the structure of the box 100 relatively compact.

[0051] In some implementations, reference Figures 2 to 3 As shown, to facilitate convenient electrical connection between the volume corrector of this application and an external structure, such as the flow meter body, the volume corrector may also include a sensor connector 330, which is electrically connected to the circuit board 310. The sensor connector 330 serves as the interface structure for the volume corrector of this application. The sensor connector 330 is also used for electrical connection with the flow meter body, allowing data signals collected by the sensor on the flow meter body to be transmitted to the circuit board 310 via the sensor connector 330.

[0052] The sensor connector 330 can be disposed in the first housing portion 120, thereby allowing the sensor connector 330 to be fixedly installed. Specifically, the first housing portion 120 can have an opening for the sensor connector 330 to pass through, so that the sensor connector 330 passes through the first housing portion 120, with one end of the sensor connector located inside the first cavity 121 and the other end of the sensor connector 330 located outside the first cavity 121. In this way, the sensor connector 330 can be snapped and fixed onto the first housing portion 120. The end of the sensor connector 330 located inside the first cavity 121 can be electrically connected to the circuit board 310, and the end of the sensor connector 330 located outside the first housing portion 120 can be connected to the flow meter body.

[0053] In addition, the sensor connector 330 can also be fixed to the first housing 120 by means of a threaded connection. Specifically, the end of the sensor connector 330 located in the first cavity 121 can be threaded, and the sensor connector 330 can be fixed to the thread of the sensor connector 330 by bolts.

[0054] In some embodiments, to enable the sensor connector 330 and power supply unit 320 to be electrically connected to the circuit board 310, the volume correction device of this application may further include a conductive element, which may be disposed within the first housing portion 120. One end of the conductive element is electrically connected to the circuit board 310, and the other end of the conductive element may be connected to both the sensor connector 330 and the power supply unit 320. By providing the conductive element, the electrical connection between the sensor connector 330 and the power supply unit 320 and the circuit board 310 can be made stable and reliable.

[0055] For details, please refer to Figures 2 to 3 As shown, the conductive component passes through the connecting hole 123 of the first housing 120. The connecting hole 123 can penetrate the outer wall of the first housing 120 that blocks the second access port 132, allowing the conductive component to be located entirely within the housing 100. The connection points between the conductive component and the sensor connector 330, and between the power supply component 320 and the circuit board 310, are located within the housing 100. This prevents the conductive component from being exposed outside the housing 100, thus protecting it. Consequently, the stability and reliability of the electrical connection between the conductive component and the sensor connector 330, the power supply component 320, and the circuit board 310 are improved.

[0056] Furthermore, by providing the connecting hole 123, the sensor connector 330, the power supply component 320, and the circuit board 310 can be electrically connected even with a shorter conductive component, thereby simplifying the structure of the conductive component.

[0057] In some embodiments, to enable the conductive component to electrically connect the sensor connector 330, the power supply component 320, and the circuit board 310, the conductive component may include multiple conductive parts. Specifically, the multiple conductive parts may be mutually opposing wire structures, with one end of each conductive part passing through the first housing 120 and electrically connected to the circuit board 310, and the other end of each conductive part being electrically connected to the power supply component 320 and the sensor connector 330, respectively. This allows the power supply component 320 and the sensor connector 330 to be independently electrically connected to the circuit board 310, preventing mutual interference between them and ensuring the stability and reliability of their independent connections to the circuit board 310.

[0058] Of course, in other embodiments, to further simplify the structure of the volume corrector of this application, the sensor connector 330 and the power supply 320 can also be electrically connected to the circuit board 310 via wireless connection. Correspondingly, the first housing 120 does not need to have a connecting hole 123, thereby simplifying the structure of the first housing 120 and making the separation between the first cavity 121 and the second cavity 131 more effective.

[0059] In some implementations, reference Figure 1 and Figure 4 As shown, in order to fix the power supply component 320 within the first cavity 121 of the first housing 120, the power supply component 320 may include a battery 321 and a battery compartment 322. The battery compartment 322 may have a battery cavity 323, and the battery 321 may be embedded within the battery cavity 323, thereby fixing the battery 321 to the battery compartment 322. The battery 321 can be connected to the circuit board 310 via a conductive element, enabling the battery 321 to supply power to the circuit board 310. The battery compartment 322 can be fixedly connected to the first housing 120, allowing the battery 321 to also be fixed to the first housing 120. This eliminates the need for a structure on the battery 321 for fixed connection to the first housing 120, simplifying the battery 321's structure and allowing the use of a common battery 321, thus reducing the cost of the volume corrector of this application.

[0060] The battery 321 can be fixed to the battery cavity 323 of the battery compartment 322 by a snap-fit ​​mechanism, making it easy to install and remove the battery 321 from the battery cavity 323. Specifically, the battery compartment 322 can be made of an elastic structural component, such as a polymer material, allowing it to deform and return to its original shape after deformation. This allows the battery 321 to be snapped into the battery cavity 323 of the battery compartment 322 by compression, or to be removed from the battery cavity 323. Consequently, when the battery 321 is depleted, it can be replaced individually without replacing the battery compartment 322, thus reducing the maintenance cost of the volume corrector of this application.

[0061] Of course, the battery cavity 323 of the battery compartment shell 322 can also be set to face the inner wall of the first cavity 121. In this way, when the battery compartment shell 322 is fixed to the first shell part 120, the battery 321 can be sandwiched between the inner wall of the first cavity 121 and the battery compartment shell 322, thus fixing the battery 321 in the battery cavity 323 of the battery compartment shell 322.

[0062] In some implementations, reference Figure 4 As shown, in order to fix the battery compartment housing 322 to the first housing portion 120, the battery compartment housing 322 of this application can be fixed to the first housing portion 120 by means of a threaded connection. Specifically, the battery compartment housing 322 and the first housing portion 120 can have corresponding openings, and the openings in the first housing portion 120 are threaded holes. By screwing the connector 210 into the corresponding openings in the battery compartment housing 322 and the first housing portion 120, the battery compartment housing 322 and the first housing portion 120 can be detachably fixed, and the connector 210 is a bolt.

[0063] In some implementations, reference Figure 4 As shown, in order to ensure that the cover plate 200 can fully block the first take-out port 122 when it is placed at the first take-out port 122, the volume correction instrument of this application may also be provided with a sealing ring 140. The sealing ring 140 may be placed between the cover plate 200 and the box body 100 to seal the connection between the cover plate 200 and the box body 100.

[0064] In some implementations, reference Figure 2 and Figure 4 As shown, the volume corrector of this application may also include a lead seal 150, which is connected to the first housing 120 and the second housing 130. When the first housing 120 and the second housing 130 are disassembled, the lead seal 150 will be destroyed accordingly. That is, when the lead seal 150 is not destroyed, it indicates that the first housing 120 and the second housing 130 have not been disassembled, and correspondingly, the circuit board 310 is not exposed.

[0065] Based on the volume corrector described above, this application also proposes a flow meter, including a flow meter body and the volume corrector described above. The flow meter body is the main component of the flow meter, and it can be connected to a fluid pipeline. The sensor in the flow meter body can collect the flow rate of the fluid in the pipeline. The sensor inside the flow meter body can be electrically connected to the sensor connector 330 of the volume corrector via a wire.

[0066] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of this application, and are not intended to limit them. Although this application has been described in detail with reference to the foregoing embodiments, those skilled in the art should understand that modifications can still be made to the technical solutions described in the foregoing embodiments, or equivalent substitutions can be made to some or all of the technical features therein. Such modifications or substitutions do not cause the essence of the corresponding technical solutions to deviate from the scope of the technical solutions of the embodiments of this application.

Claims

1. A volume correction instrument, characterized in that, include: The box body (100) has a first cavity (121), a second cavity (131) and a first take-out port (122), the first cavity (121) is separated from the second cavity (131), and the first take-out port (122) is connected to the first cavity (121); A cover plate (200) is detachably disposed at the first loading / unloading port (122); Circuit board (310)(200) is disposed in the second cavity (131); A power supply unit (320) is disposed in the first cavity (121) and electrically connected to the circuit board (310).

2. The volume correction instrument according to claim 1, characterized in that, The box body (100) includes a first shell portion (120) and a second shell portion (130). The first cavity (121) and the first take-out port (122) are located in the first shell portion (120), and the second cavity (131) is located in the second shell portion (130). The second shell portion (130) has a second take-out port (132) communicating with the second cavity (131). The first shell portion (120) is detachably sealed to the second take-out port (132).

3. The volume corrector according to claim 2, characterized in that, The first pick-up / placement port (122) is located on the side of the first shell portion (120) facing away from the second shell portion (130), and the second pick-up / placement port (132) is located on the side of the second shell portion (130) facing the first shell portion (120).

4. The volume corrector according to claim 3, characterized in that, The volume corrector also includes a sensor connector (330), which is disposed in the first housing (120). One end of the sensor connector (330) is located in the first cavity (121), and the other end of the sensor connector (330) is located outside the first cavity (121). The sensor connector (330) can be electrically connected to the circuit board (310).

5. The volume correction device according to claim 4, characterized in that, The volume corrector also includes a conductive element. The first housing (120) has a connecting hole (123) that connects the first cavity (121) and the second cavity (131). The conductive element passes through the connecting hole (123) so that the conductive element is located inside the housing (100). The circuit board (310) is electrically connected to the power supply (320) and the sensor connector (330) through the conductive element.

6. The volume corrector according to any one of claims 2-5, characterized in that, The power supply unit (320) includes a battery (321) and a battery compartment (322). The battery (321) is embedded in the battery compartment (322) and is electrically connected to the circuit board (310). The battery compartment (322) is detachably connected to the inner wall of the box body (100) located in the second cavity (131).

7. The volume corrector according to claim 6, characterized in that, The volume corrector also includes a connector (210) which passes through the cover plate (200) and the battery compartment shell (322) and is connected to the first shell part (120).

8. The volume corrector according to claim 2, characterized in that, The volume corrector also includes a sealing ring (140), which is sealed between the cover plate (200) and the first shell portion (120).

9. The volume correction instrument according to claim 2, characterized in that, The volume corrector also includes a lead seal (150), which is connected to the first housing (120) and the second housing (130) respectively.

10. A flow meter, characterized in that, The device includes a flow meter body and a volume corrector as described in any one of claims 1-9, wherein the circuit board (310) is electrically connected to the flow meter body.

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