A cable loop flow monitoring device

Abstract

The application is suitable for the technical field of electronic equipment, and provides a cable circulating current monitoring device.The cable circulating current monitoring device comprises a shell, a containing cavity is arranged in the shell, a main control circuit board and a battery are arranged in the containing cavity, the battery is used for supplying power for the main control circuit board, a current transformer is electrically connected with the main control circuit board, the current transformer is used for being sleeved on the outer surface of a grounding cable to induct the cable circulating current and output an inductive signal to the main control circuit board, and a screwable connecting piece is connected with the shell, and the screwable connecting piece is used for being detachably connected with the grounding cable.By installing the main control circuit board and the battery in the shell, and electrically connecting the current transformer with the main control circuit board, the overall structure is compact, the overall volume of the device is reduced, the screwable connecting piece is connected with the grounding cable, the installation connection of the monitoring device and the grounding cable is realized, the installation is convenient and fast, the screwable connecting piece can be adjusted in size to be suitable for grounding cables of various sizes, and the application range is wide.

Description

Technical Field

[0001] This application belongs to the field of electronic equipment technology, and in particular relates to a cable circulation monitoring device. Background Technology

[0002] Cable circulating current refers to the induced electromotive force (EMF) generated in the metal sheath of a high-voltage cable due to the alternating magnetic field produced by the current. If this magnetic field forms a path through the ground, a grounding circulating current will be generated in the metal sheath. Excessive circulating current can affect the cable's current-carrying capacity and service life, and may even cause overheating and damage. The magnitude of cable circulating current is influenced by various factors, including the cable's contact resistance, grounding resistance, grounding method, and the length and arrangement of cable segments. Monitoring cable circulating current is necessary to protect cables, extend their service life, and prevent accidents.

[0003] In existing technologies, monitoring of circulating current in high-voltage cables typically involves installing a grounding box on the grounding wire of the coaxial cable sheath. The grounding box is powered via external power supply, inductive power, or battery power. However, this method results in bulky monitoring equipment that is inconvenient to install. Furthermore, while existing small-scale cable circulating current monitoring devices can be installed on grounding cables of corresponding sizes, installation with grounding cables of different diameters requires replacement or redesign of the connector, indicating low adaptability to different wire diameters. Utility Model Content

[0004] This application provides a cable circulating current monitoring device, which aims to solve the problems of inconvenient installation and limited applicability of existing grounding boxes.

[0005] This application provides a cable circulating current monitoring device, comprising:

[0006] The housing has a receiving cavity inside;

[0007] The main control circuit board and battery are housed within the cavity, with the battery providing power to the main control circuit board.

[0008] A current transformer electrically connected to the main control circuit board is used to induce current circulation in the grounding cable by being fitted onto the outer surface of the grounding cable and to output an induced signal to the main control circuit board; and

[0009] A screw-on connector that connects to the housing is used for a detachable connection to a grounding cable.

[0010] Furthermore, the housing includes an upper shell and a lower shell, which together form a receiving cavity. The current transformer and a screw-on connector are connected to the lower shell.

[0011] Furthermore, the lower shell is provided with a mounting groove, a cover plate, and wire holes;

[0012] When the current transformer is embedded in the mounting slot, the cover plate connects with the opening of the mounting slot to install and fix the current transformer.

[0013] The current transformer's wiring passes through the wire hole and is electrically connected to the main control circuit board.

[0014] Furthermore, the opening of the mounting groove is provided with a step, the depth of which is the same as the thickness of the cover plate.

[0015] Furthermore, the current transformer is aligned with the screw-on connector hole.

[0016] Furthermore, the current transformer is a self-powered current transformer, which is also used to power the main control circuit board.

[0017] Furthermore, the current transformer includes at least two arc-shaped transformer segments that are snap-fitted together.

[0018] Furthermore, the housing is equipped with an RJ45 interface that is electrically connected to the main control circuit board. The RJ45 interface is used to connect to an external communication module.

[0019] Furthermore, it also includes a pull-out battery compartment, with the housing having a battery compartment opening for inserting the pull-out battery compartment, and the battery can be detachably installed inside the battery compartment.

[0020] Furthermore, the housing is provided with several current transformer connection ports that are electrically connected to the main control circuit board. The current transformer connection ports are used to connect to the lead plugs of external current transformers.

[0021] The beneficial effects of this application are as follows: The cable circulating current monitoring device provided by this application includes a housing with a receiving cavity inside; a main control circuit board and a battery disposed within the receiving cavity, the battery being used to power the main control circuit board; a current transformer electrically connected to the main control circuit board, the current transformer being used to induct cable circulating current by being fitted onto the outer surface of the grounding cable and outputting an induced signal to the main control circuit board; and a swivelable connector connected to the housing, the swivelable connector being used for detachable connection with the grounding cable. By installing the main control circuit board and battery inside the housing, and then electrically connecting the current transformer to the main control circuit board, the overall structure is compact, reducing the overall size of the device. Furthermore, the connection to the grounding cable via the swivelable connector enables convenient and quick installation of the monitoring device and the grounding cable. Moreover, the swivelable connector is adjustable in size to accommodate various sizes of grounding cables, thus having a wide range of applications. Attached Figure Description

[0022] Figure 1 This is a schematic diagram of the connection between an embodiment of the cable circulating current monitoring device provided in this application and a grounding cable;

[0023] Figure 2This is a partial structural diagram of an embodiment of the cable circulating current monitoring device provided in this application connected to a grounding cable;

[0024] Figure 3 This is a schematic diagram of the structure of an embodiment of the cable circulating current monitoring device provided in this application, in which a current transformer is installed in the housing;

[0025] Figure 4 This is a schematic diagram of the structure of a cable circulating current monitoring device provided in this application, showing the removal of a current transformer;

[0026] Figure 5 This is a schematic diagram of an embodiment of the cable circulation monitoring device provided in this application, which includes a pull-out battery compartment.

[0027] Figure 6 This is a schematic diagram of a pull-out battery compartment with a first magnet, one embodiment of the cable circulation monitoring device provided in this application;

[0028] Figure 7 This is a schematic diagram of an embodiment of the cable circulating current monitoring device provided in this application, which is equipped with a current transformer connection port.

[0029] Explanation of reference numerals in the attached figures:

[0030] 100-Housing, 110-Upper housing, 120-Lower housing, 122-Wire hole, 130-Mounting base, 131-Concave surface, 132-Screw, 140-Mounting groove, 150-Cover plate, 160-Step, 170-Baffle, 180-Battery compartment opening, 181-Second magnet, 200-Current transformer, 300-Tightenable connector, 310-Tightening part, 320-Flexible connecting strip, 400-Grounding cable, 500-RJ45 interface, 600-Pull-out battery compartment, 601-First magnet, 700-Transformer connection port. Detailed Implementation

[0031] To make the objectives, technical solutions, and advantages of this application clearer, the following detailed description is provided in conjunction with the accompanying drawings and embodiments. Examples of 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 are only used to explain this application, and should not be construed as limiting this application. Furthermore, it should be understood that the specific embodiments described herein are merely for explaining this application and are not intended to limit this application.

[0032] In the description of this application, it should be understood that the terms "length", "width", "upper", "lower", "left", "right", "horizontal", "top", "bottom", etc., indicate the orientation or positional relationship based on the orientation or positional 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, or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of this application.

[0033] 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. Therefore, features defined as "first" or "second" may explicitly or implicitly include one or more features. In the description of this application, "multiple" means two or more, unless otherwise explicitly specified.

[0034] In the description of this application, it should be noted that, unless otherwise expressly specified and limited, the terms "installation," "connection," and "linking" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a mechanical connection, a link, or a connection that allows for communication; 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. Those skilled in the art can understand the specific meaning of the above terms in this application according to the specific circumstances.

[0035] In this application, unless otherwise expressly specified and limited, "above" or "below" the second feature can include direct contact between the first and second features, or contact between the first and second features through another feature between them. Furthermore, "above," "over," and "on top" of the second feature includes the first feature being directly above or diagonally above the second feature, or simply indicates that the first feature is at a higher horizontal level than the second feature. "Below," "below," and "under" the second feature includes the first feature being directly below or diagonally below the second feature, or simply indicates that the first feature is at a lower horizontal level than the second feature.

[0036] The following disclosure provides numerous different embodiments or examples for implementing various structures of this application. To simplify the disclosure, specific examples of components and arrangements are described below. These are merely examples and are not intended to limit the scope of this application. Furthermore, reference values ​​and / or reference letters may be repeated in different examples; such repetition is for simplification and clarity and does not in itself indicate a relationship between the various embodiments and / or arrangements discussed. In addition, various specific examples of processes and materials are provided in this application, but those skilled in the art will recognize the application of other processes and / or the use of other materials.

[0037] The cable circulating current monitoring device provided in this application includes a housing with a receiving cavity inside; a main control circuit board and a battery disposed within the receiving cavity, the battery supplying power to the main control circuit board; a current transformer electrically connected to the main control circuit board, the current transformer being used to induct cable circulating current by being fitted onto the outer surface of the grounding cable and outputting an induced signal to the main control circuit board; and a swivelable connector connected to the housing, which is used for detachable connection to the grounding cable. By installing the main control circuit board and battery within the housing, and then electrically connecting the current transformer to the main control circuit board, the overall structure is compact, reducing the overall size of the device. The swivelable connector allows for easy and quick installation of the monitoring device to the grounding cable, and its adjustable size accommodates various sizes of grounding cables, thus broadening its applicability.

[0038] like Figures 1 to 7 As shown, one embodiment of this application provides a cable circulating current monitoring device, comprising:

[0039] The housing 100 has a receiving cavity inside;

[0040] The main control circuit board (not shown) and battery 700 are disposed in the receiving cavity. The battery 700 is used to power the main control circuit board.

[0041] The current transformer 200, electrically connected to the main control circuit board, is used to induct the circulating current in the grounding cable 400 and output an induced signal to the main control circuit board; and

[0042] A screw-on connector 300 is connected to the housing 100 and is used for detachable connection with the grounding cable 400.

[0043] In practice, the current transformer 200 is an instrument that measures a large primary current by converting it into a small secondary current based on the principle of electromagnetic induction. Typically, the current transformer 200 consists of a closed magnetic core and windings. The primary winding of the current transformer 200 is connected in series in the circuit containing the current to be measured, while the secondary winding is connected in series in the measuring instrument and protection circuit. For example, the secondary winding of the current transformer 200 can be electrically connected to the main control circuit board, enabling the current transformer 200 to sense the circulating current in the grounding cable 400, obtain an induced signal, and output the induced signal to the main control circuit board, thus realizing the monitoring function of the cable circulating current.

[0044] The housing 100 is used to protect the main control circuit board and the battery. The housing 100 can be made of insulating material, such as plastic, without specific limitations.

[0045] Optionally, the housing 100 includes an upper housing 110 and a lower housing 120, which together form a receiving cavity, and the screw-on connector 300 is connected to the lower housing 120.

[0046] The battery powers the main control circuit board, enabling the basic function of cable circulation monitoring.

[0047] The lower shell 120 is provided with a mounting base 130. The mounting base 130 has a concave surface 131 on the side away from the lower shell 120. The concave surface 131 has a mounting hole (not shown in the figure), which can be tightened to connect the connector 300 to the mounting hole by screw 132.

[0048] The housing 100 can be detachably connected to the grounding cable 400 via a screw-on connector 300. The screw-on connector 300 has a screwing part 310 and a flexible connecting strip 320. The flexible connecting strip 320 has several teeth along its length. The screwing part 310 is installed on the concave surface 131 and is in a rotatable ring shape. The inner surface of the ring of the screwing part 310 is provided with helical teeth. One end of the flexible connecting strip 320 is fixedly connected to the mounting base 130, and the other end of the flexible connecting strip 320 passes through the screwing part 310, so that the helical teeth and the teeth on the flexible connecting strip 320 mesh. By rotating the screwing part 310, the ring size of the flexible connecting strip 320 can be adjusted, so that it is tightly fitted on the outer surface of the grounding cable 400, thus realizing the assembly of the cable circulating current monitoring device and the grounding cable 400. The installation is convenient and quick, and it can be used for grounding cables 400 of various sizes, with a wide range of applications.

[0049] Optionally, the current transformer 200 is aligned with the hole of the screw-on connector 300, that is, the current transformer 200 is in the shape of a ring, and the grounding cable 400 passes through the center of the current transformer 200. At the same time, the screw-on connector 300 is sleeved on the outer surface of the grounding cable 400, so as to avoid the situation where the grounding cable 400 cannot be inserted during installation.

[0050] In some embodiments, the lower housing 120 is provided with a mounting groove 140, a cover plate 150 and a wire hole 122;

[0051] When the current transformer 200 is embedded in the mounting groove 140, the cover plate 150 is connected to the opening of the mounting groove 140 for mounting and fixing the current transformer 200.

[0052] The current transformer 200's wiring passes through wire hole 122 and is electrically connected to the main control circuit board.

[0053] During implementation, the mounting groove 140 and the cover plate 150 form a cavity. The mounting groove 140 is formed by the inward indentation of the lower shell 120. A baffle 170 is provided in the middle position of the mounting groove 140. During installation, one side of the current transformer 200 is snapped between the mounting groove 140 and the baffle 170, and is installed in the opening of the mounting groove 140 through the cover plate 150 to press and fix the current transformer 200 on the shell 100.

[0054] Optionally, a step 160 is provided at the opening of the mounting groove 140, and the depth of the step 160 is the same as the thickness of the cover plate 150, so that the cover plate 150 is flush with the top surface of the lower shell 120 after it is closed.

[0055] In some embodiments, the current transformer 200 is a self-powered current transformer 200, which is also used to power the main control circuit board. The cable circulating current monitoring device provided in this application is no longer limited to a single power supply method of a battery with rated capacity. The self-powered current transformer 200 draws power from the grounding cable 400 to power the cable circulating current monitoring device. In other words, in addition to sensing the magnetic field of the grounding cable 400 to realize the monitoring function of cable circulating current, the self-powered current transformer 200 can also power the main control circuit board. It is not affected by the increased power consumption when the cable circulating current monitoring device uploads data or by factors such as ambient temperature and humidity, which greatly improves the battery life.

[0056] Optionally, the current transformer 200 adopts a common openable and closable structure. During installation, both the current transformer 200 and the screw-on connector 300 are opened, and the current transformer 200 is snapped onto the grounding cable 400 and secured without disconnecting the power. Then, the screw-on connector 300 is fastened and tightened by the screwing part, thereby fixing it to the grounding cable 400. The installation is convenient and quick.

[0057] Optionally, the housing 100 is provided with an RJ45 interface 500 that is electrically connected to the main control circuit board. The RJ45 interface 500 is used to connect to an external communication module.

[0058] RJ45 is a type of connector for information outlets (i.e., communication leads) in cabling systems. The connector consists of a plug (connector, crystal head) and a socket (module). The socket is the RJ45 interface 500, which will not be described in detail.

[0059] The housing 100 integrates a LoRa wireless module and an Ethernet module, and is equipped with an automatic switching structure. When the wireless signal strength is low, the mechanical contact is triggered to switch to wired transmission, and an indicator light is used to indicate this, ensuring uninterrupted data transmission in complex utility tunnel environments.

[0060] As one possible implementation, a waterproof plug (not shown) is also included, which is compatible with the RJ45 interface 500. Normally, when the RJ45 interface 500 is not needed, the waterproof plug is used to block it, providing waterproof and dustproof protection. When the RJ45 interface 500 is needed, the waterproof plug is removed for connection.

[0061] Optionally, it also includes a pull-out battery compartment 600, the housing 100 having a battery compartment opening 180 for inserting the pull-out battery compartment 600, and the battery being removably installed in the battery compartment 600.

[0062] The housing 100 has a battery compartment opening 180. The inner side of the pull-out battery compartment 600 is provided with a reverse connection protection copper plate. The pull-out battery compartment 600 can be inserted into the battery compartment opening 180, thereby electrically connecting to the main control circuit board and supplying power to the main control circuit board. When the pull-out battery compartment 600 pops out from the battery compartment opening 180, the battery can be replaced.

[0063] A first magnet 601 for attaching to the lower shell 120 is provided on the pull-out battery compartment 600, and a second magnet 181 corresponding to the first magnet 601 is provided at the corresponding position of the battery compartment opening 180, so that the pull-out battery compartment 600 can be connected to the lower shell 120 under the action of the first magnet 601 and the second magnet 181. Specifically, the first magnet 601 is provided on the inside of the hanging ears on both sides of the pull-out battery compartment 600, and the second magnet 181 is provided on the battery compartment opening 180.

[0064] Alternatively, the battery can be a dry cell battery or a lithium battery. For example, the pull-out battery compartment is compatible with two 18650 lithium batteries or four AA dry cell batteries.

[0065] In some embodiments, the pull-out battery compartment 600 is double-fixed to the housing 100 by a magnetic core and a snap-fit, allowing the battery to be pulled out and replaced without tools.

[0066] Optionally, an insulating and waterproof strip is affixed to the outside of the pull-out battery compartment 600 to improve the waterproof sealing of the battery compartment opening 180 and protect the battery safety.

[0067] Optionally, a battery power detection probe is provided inside the housing 100 to provide real-time feedback on the battery life status.

[0068] Optionally, the housing 100 is provided with several current transformer connection ports 700 that are electrically connected to the main control circuit board. The current transformer connection ports 700 are used to connect to the lead plugs of external current transformers. That is, the current transformer 200 can be snapped into the cavity, or one or more external current transformers can be connected to the current transformer connection ports 700 through leads, realizing a one-to-one or one-to-many scenario between the main control circuit board and the current transformer 200.

[0069] The cable circulating current monitoring device provided in this application includes a housing 100 with a receiving cavity inside; a main control circuit board and a battery disposed within the receiving cavity, the battery supplying power to the main control circuit board; a current transformer 200 connected to the housing 100 and electrically connected to the main control circuit board, used to sense cable circulating current when fitted onto the outer surface of the grounding cable 400 and outputting a sensed signal to the main control circuit board; and a swivelable connector 300 connected to the housing 100 for detachable connection to the grounding cable 400. By installing the main control circuit board and battery within the housing 100, and then connecting the current transformer 200 to the housing 100, the overall structure is compact, reducing the overall size of the device. The swivelable connector 300 connects the monitoring device to the grounding cable 400, enabling convenient and quick installation. Furthermore, the swivelable connector 300 is adjustable to accommodate various sizes of grounding cables 400, thus broadening its applicability.

[0070] The above are merely preferred embodiments of this application and are not intended to limit this application. Any modifications, equivalent substitutions, and improvements made within the spirit and principles of this application should be included within the protection scope of this application.

Claims

1. A cable circulating current monitoring device, characterized in that, include: A housing, wherein a receiving cavity is provided inside the housing; The main control circuit board and battery are disposed within the cavity, and the battery is used to power the main control circuit board. A current transformer electrically connected to the main control circuit board is used to be fitted onto the outer surface of the grounding cable to sense the circulating current in the cable and output a sensed signal to the main control circuit board. as well as A screwable connector connected to the housing, the screwable connector being used for detachable connection with the grounding cable.

2. The cable circulating current monitoring device as described in claim 1, characterized in that, The housing includes an upper shell and a lower shell, which together form the receiving cavity, and the screw-on connector is connected to the lower shell.

3. The cable circulating current monitoring device as described in claim 2, characterized in that, The lower shell is provided with a mounting groove, a cover plate, and wire holes; When the current transformer is embedded in the mounting slot, the cover plate is connected to the opening of the mounting slot for mounting and fixing the current transformer. The current transformer's wiring passes through the wire hole and is electrically connected to the main control circuit board.

4. The cable circulating current monitoring device as described in claim 3, characterized in that, The opening of the mounting groove is provided with a step, and the depth of the step is the same as the thickness of the cover plate.

5. The cable circulating current monitoring device as described in claim 3, characterized in that, The current transformer is aligned with the screw-on connector hole.

6. The cable circulating current monitoring device as described in claim 1, characterized in that, The current transformer is a self-powered current transformer, which is also used to power the main control circuit board.

7. The cable circulating current monitoring device as described in claim 1 or 6, characterized in that, The current transformer includes at least two arc-shaped transformer segments that can be opened and closed with snap-fit ​​connections.

8. The cable circulating current monitoring device as described in any one of claims 1 to 6, characterized in that, The housing is provided with an RJ45 interface that is electrically connected to the main control circuit board. The RJ45 interface is used to connect to an external communication module.

9. The cable circulating current monitoring device as described in any one of claims 1 to 6, characterized in that, It also includes a pull-out battery compartment, the housing having a battery compartment opening for inserting the pull-out battery compartment, and the battery being detachably installed in the battery compartment.

10. The cable circulating current monitoring device as described in claim 3, characterized in that, The housing is provided with several current transformer connection ports that are electrically connected to the main control circuit board. The current transformer connection ports are used to connect to the lead plugs of external current transformers.

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