Cable limiter

Abstract

The utility model discloses a cable limiter, comprising: a limiting device comprising a housing, the housing is provided with a plurality of limiting holes, the limiting holes are matched with the shape of a cable along the limiting holes, and the cable is inserted in the limiting holes to prevent the cable from intertwining; the current transformer is arranged in the shell, and the current transformer is used for obtaining electric quantity from the cable; the refrigerating device is arranged in the shell, the refrigerating device is electrically connected with the current transformer, and the current transformer is used for supplying power to the refrigerating device; and the controller device is electrically connected with the current transformer and the refrigeration device, and the controller device controls the working state of the refrigeration device. The safety and reliability of equipment can be improved, the heat dissipation performance of the cable is improved, and the construction period is shortened.

Description

Technical Field

[0001] The utility model relates to the technical field of electric power engineering, in particular to a cable limiter. Background Art

[0002] With changes in energy structure and technological advancements, industrial and commercial energy storage power stations have become a key link in improving energy utilization efficiency and stability. To achieve efficient energy storage and release, these energy storage stations typically use a 0.4kV voltage level for charging and discharging operations. However, in high-power applications (such as those with power reaching 800kW and above), the need to connect at least three cables per phase poses new challenges. Multi-core cables are cables that combine multiple independent conductors (cells) wrapped together in a common insulating sheath. This structure allows multiple conductors to share space within the same protective layer, simplifying the installation process and reducing the required space.

[0003] When connecting multi-core cables to a copper busbar, they often become entangled between the cores. This can lead to problems such as reduced heat dissipation at the access point, shortened cable connector life, and reduced overall system efficiency. The long-term stress from this entanglement can cause deformation of the switch busbar and even lead to safety incidents. Utility Model Content

[0004] The present invention aims to solve at least one of the technical problems existing in the prior art. To this end, the present invention provides a cable limiter that can improve the safety and reliability of equipment, improve the heat dissipation performance of cables, and shorten the construction period.

[0005] A cable stopper according to a first embodiment of the present invention includes:

[0006] The limiting device includes a housing, the housing is provided with a plurality of limiting holes, the limiting holes are adapted to the shape of the cables, and the cables are inserted into the limiting holes to prevent the cables from being entangled with each other;

[0007] A current transformer is disposed inside the housing and is used to obtain electricity from the cable;

[0008] a refrigeration device, disposed in the housing, the refrigeration device being electrically connected to the current transformer, the current transformer being used to supply power to the refrigeration device;

[0009] A controller device is electrically connected to the current transformer and the refrigeration device, and the controller device controls the working state of the refrigeration device.

[0010] A cable limiter according to an embodiment of the present invention has at least the following beneficial effects: by providing a plurality of limiting holes on the shell, it effectively prevents multi-core cables from being entangled when connected to the copper busbar, thereby avoiding deformation damage to the copper busbar caused by the stress generated by the entanglement between the cores, and improving the safety and reliability of the cable access point; the built-in current transformer and semiconductor refrigeration plate of the device are combined to generate induced current through electromagnetic induction to power the semiconductor refrigeration plate, effectively solving the problem of poor heat dissipation at the access point and extending the service life of the cable joint; the controller device can automatically adjust the working state of the refrigeration device according to the information obtained from the current transformer, ensuring that the temperature at the cable joint is maintained within a safe range, further improving the stability and safety of the system; the design of the limiter simplifies the cable installation process, can significantly shorten the project construction time, and improve work efficiency.

[0011] According to some embodiments of the present invention, a first connecting portion and a second connecting portion are provided on either side of the housing, respectively, and the first connecting portion and the second connecting portion are adapted to splice two cable retainers. The design of the first connecting portion and the second connecting portion makes splicing the cable retainers simple and quick, simplifies the installation process, and improves construction efficiency.

[0012] According to some embodiments of the present invention, the first connecting portion and the second connecting portion are provided with a plurality of threaded connection holes, wherein the threaded connection holes are suitable for splicing the two cable stoppers. The threaded connection holes are used to connect the two cable stoppers using fasteners, thereby ensuring the firmness and stability of the connection between the cable stoppers.

[0013] According to some embodiments of the present invention, rivet assemblies are provided on both sides of the first connecting portion and the second connecting portion, respectively. Multiple cable retainers can be spliced ​​together using the rivet assemblies without the need for additional tools, thereby simplifying the installation process and facilitating maintenance and replacement.

[0014] According to some embodiments of the present invention, the controller device further includes a temperature sensor disposed within the housing and electrically connected to the controller device, and the controller device controls the operating state of the refrigeration device based on the temperature measured by the temperature sensor. The temperature sensor is connected to the controller device, and the controller device can automatically adjust the operating state of the refrigeration device based on temperature information fed back by the temperature sensor, thereby achieving intelligent temperature control.

[0015] According to some embodiments of the present invention, the cooling device is a semiconductor refrigeration chip, the shape of which is compatible with the shape of the housing, and the cooling end of the semiconductor refrigeration chip is arranged corresponding to the limiting hole. The cooling end of the semiconductor refrigeration chip directly corresponds to the limiting hole, which can accurately provide cooling for the cable joint and ensure that the temperature at the cable joint is effectively controlled. The shape of the semiconductor refrigeration chip is compatible with the shape of the housing, allowing the refrigeration chip to fit more closely to the cable, thereby improving heat dissipation efficiency.

[0016] According to some embodiments of the present invention, the limiting hole is a through hole, so that the cable can pass through the limiting hole easily, and the air circulation at the cable joint can be improved, thereby improving the heat dissipation efficiency.

[0017] According to some embodiments of the present invention, the housing is made of an insulating material. A housing made of an insulating material can effectively prevent current leakage and improve the safety of the cable limiter.

[0018] According to some embodiments of the present invention, the insulating material is polyetheretherketone (PEEK). As a high-performance engineering plastic, PEEK has excellent electrical insulation properties, can effectively prevent current leakage, improve the safety of the cable limiter, and can be used in harsh environments for a long time without being easily corroded, thereby improving the durability and service life of the device.

[0019] According to some embodiments of the present invention, three limiting holes are provided in the limiting device, and each limiting hole independently manages a cable, which can effectively prevent the cables from being entangled with each other and improve the stability of the cable connection.

[0020] Additional aspects and advantages of the present invention will be given in part in the following description and will become apparent from the following description or learned through practice of the present invention. BRIEF DESCRIPTION OF THE DRAWINGS

[0021] The present invention will be further described below with reference to the accompanying drawings and embodiments, wherein:

[0022] Figure 1 This is one of the schematic diagrams of a cable limiter according to an embodiment of the present utility model;

[0023] Figure 2 This is a second schematic diagram of a cable limiter according to an embodiment of the present utility model;

[0024] Figure 3 This is a third schematic diagram of a cable limiter according to an embodiment of the present utility model.

[0025] Reference numerals: current transformer 100 ; refrigeration device 110 ; limiting hole 120 ; first connecting portion 130 ; second connecting portion 140 ; ​​housing 150 . DETAILED DESCRIPTION

[0026] The following describes embodiments of the present invention in detail. Examples of the embodiments are shown in the accompanying drawings, wherein the same or similar reference numerals throughout represent the same or similar elements or elements having the same or similar functions. The embodiments described below with reference to the accompanying drawings are exemplary and are intended only to explain the present invention and are not to be construed as limiting the present invention.

[0027] In the description of the present invention, it should be understood that descriptions involving orientations, such as up, down, front, back, left, right, etc., indicating orientations or positional relationships, are based on the orientations or positional relationships shown in the accompanying drawings. They are only for the convenience of describing the present invention 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. Therefore, they cannot be understood as limitations on the present invention.

[0028] In the description of this utility model, "several" means one or more, "many" means more than two, "greater than," "less than," and "exceed" are understood to exclude the number itself, while "above," "below," and "within" are understood to include the number itself. The use of "first" and "second" in the description is solely for the purpose of distinguishing technical features and is not to be construed as indicating or implying relative importance, implicitly specifying the number of the indicated technical features, or implicitly specifying the order of the indicated technical features.

[0029] In the description of this utility model, unless otherwise expressly defined, terms such as "set," "install," and "connect" should be interpreted broadly. Those skilled in the art can reasonably determine the specific meanings of these terms in the present utility model based on the specific content of the technical solution. In the description of this utility model, reference to the terms "one embodiment," "some embodiments," "illustrative embodiments," "examples," "specific examples," or "some examples" means that the specific features, structures, materials, or characteristics described in conjunction with such embodiment or example are included in at least one embodiment or example of the utility model. In this specification, the schematic representation of these terms does not necessarily refer to the same embodiment or example. Moreover, the specific features, structures, materials, or characteristics described may be combined in any appropriate manner in any one or more embodiments or examples. In the description of this specification, reference to the terms "one embodiment," "some embodiments," "illustrative embodiments," "examples," "specific examples," or "some examples" means that the specific features, structures, materials, or characteristics described in conjunction with such embodiment or example are included in at least one embodiment or example of the utility model. In this specification, the schematic representation of these terms does not necessarily refer to the same embodiment or example. Furthermore, the specific features, structures, materials, or characteristics described may be combined in any suitable manner in any one or more embodiments or examples.

[0030] Reference Figures 1 to 3 , a cable limiter, comprising:

[0031] The limiting device includes a housing 150 , the housing 150 is provided with a plurality of limiting holes 120 , the limiting holes 120 are adapted to the shape of the cables along the limiting holes 120 , and the cables are inserted into the limiting holes 120 to prevent the cables from being entangled with each other;

[0032] The current transformer 100 is disposed inside the housing 150 and is used to obtain electricity from the cable;

[0033] The refrigeration device 110 is disposed in the housing 150 . The refrigeration device 110 is electrically connected to the current transformer 100 . The current transformer 100 is used to supply power to the refrigeration device 110 .

[0034] The controller device is electrically connected to the current transformer 100 and the refrigeration device 110 , and controls the working state of the refrigeration device 110 .

[0035] By setting a plurality of limiting holes 120 on the shell 150, the entanglement of multi-core cables when connected to the copper busbar is effectively prevented, thereby avoiding deformation damage to the copper busbar caused by the stress generated by the entanglement between the cores, and improving the safety and reliability of the cable access point; the current transformer 100 built into the device is combined with the semiconductor refrigeration plate, and the induced current is generated by electromagnetic induction to power the semiconductor refrigeration plate, which effectively solves the problem of poor heat dissipation at the access point and extends the service life of the cable joint; the controller device can automatically adjust the working state of the refrigeration device 110 according to the information obtained from the current transformer 100, ensuring that the temperature at the cable joint is maintained within a safe range, further improving the stability and safety of the system; the design of the limiter simplifies the cable installation process, can significantly shorten the project construction time, and improve work efficiency.

[0036] The housing 150 is provided with a first connecting portion 130 and a second connecting portion 140 on either side. The first connecting portion 130 and the second connecting portion 140 are suitable for splicing two cable retainers. The design of the first connecting portion 130 and the second connecting portion 140 makes splicing the cable retainers simple and quick, simplifying the installation process and improving construction efficiency.

[0037] The first connecting portion 130 and the second connecting portion 140 are provided with a plurality of threaded connection holes, which are suitable for splicing two cable stoppers. The threaded connection holes are used to connect the two cable stoppers using fasteners, thereby ensuring the firmness and stability of the connection between the cable stoppers.

[0038] Rivet buckle assemblies are respectively provided on both sides of the first connecting portion 130 and the second connecting portion 140. Multiple cable stoppers can be spliced ​​together by the rivet buckle assemblies without using additional tools, which can simplify the installation process and facilitate maintenance and replacement.

[0039] The controller device also includes a temperature sensor disposed within housing 150. The temperature sensor is electrically connected to the controller device, and the controller device controls the operating state of refrigeration device 110 based on the temperature measured by the temperature sensor. The temperature sensor is connected to the controller device, and the controller device can automatically adjust the operating state of refrigeration device 110 based on the temperature information fed back by the temperature sensor, thereby achieving intelligent temperature control.

[0040] Refrigeration device 110 is a semiconductor refrigeration chip. The shape of the semiconductor refrigeration chip is adapted to the shape of housing 150. The cooling end of the semiconductor refrigeration chip is positioned corresponding to the limiting hole 120. The cooling end of the semiconductor refrigeration chip is directly aligned with the limiting hole 120, which can accurately cool the cable joint and ensure that the temperature at the cable joint is effectively controlled. The shape of the semiconductor refrigeration chip and the shape of housing 150 are adapted to each other, allowing the refrigeration chip to fit more closely to the cable, improving heat dissipation efficiency.

[0041] Reference Figures 1 to 2 , three limiting holes 120 are provided in the limiting device. Each limiting hole 120 independently manages a cable, which can effectively prevent the cables from being entangled with each other and improve the stability of the cable connection. It can be understood that the number of limiting holes 120 in the limiting device can be increased or decreased according to actual production conditions. For example, if some cables are four-core, the number of limiting holes 120 can be set to four to adapt to four-core cables. The limiting hole 120 is a through hole. The cable can easily pass through the limiting hole 120, and the air circulation at the cable joint can be improved, thereby improving the heat dissipation efficiency. In order to ensure the stability of the cable in the limiting hole 120, a protrusion can also be provided inside the limiting hole 120. These protrusions can fix the cable and prevent the cable from moving or loosening during use, thereby further improving the safety and reliability of the cable joint.

[0042] Housing 150 is made of an insulating material. This material effectively prevents current leakage, enhancing the safety of the cable limiter. The insulating material is polyetheretherketone (PEEK). As a high-performance engineering plastic, PEEK offers excellent electrical insulation properties, effectively preventing current leakage and improving the safety of the cable limiter. It also withstands long-term corrosion in harsh environments, enhancing the durability and service life of the device.

[0043] Reference Figures 1 to 3In this embodiment, a limiter for 0.4kV grid-connected cables in industrial and commercial energy storage power stations is disclosed. The limiter is intended to solve the problems of poor heat dissipation and short service life caused by inter-core entanglement when multi-core cables are connected, while reducing the damage to the switch copper busbar caused by inter-core stress, thereby improving the overall efficiency and safety of the energy storage power station.

[0044] The limiting device includes a shell 150 made of PEEK material, and three limiting holes 120 are provided in the shell 150. The shape of the limiting holes 120 matches the shape of the cable to ensure that the cable can be inserted and limited, and to prevent the cables from being entangled with each other. The current transformer 100 is arranged inside the shell 150, and is used to detect the current flowing through the cable and to supply power to the refrigeration device 110 and the controller device. The refrigeration device 110 is a semiconductor refrigeration plate, which is installed in the shell 150 and is electrically connected to the current transformer 100. The cooling end of the semiconductor refrigeration plate is adjacent to the cable limiting hole 120, and the heat conducting end is connected to the grounding wire of the electrical cabinet to conduct heat. The controller device is electrically connected to the current transformer 100 and the refrigeration device 110, and controls the working state of the refrigeration device 110 according to the temperature measured by the temperature sensor. In addition, the controller device is also equipped with a temperature sensor for monitoring the internal temperature of the shell 150. The housing 150 is provided with a first connecting portion 130 and a second connecting portion 140 on either side. Threaded holes are provided on the two connecting portions to allow at least two cable retainers to be spliced ​​together using fasteners. In addition, rivet assemblies are provided on both sides of the connecting portions for quick connection or removal.

[0045] When installing the cable and limiter, first insert the cable into the limit hole 120 to ensure that the cable is correctly positioned, then use the current transformer 100 to detect the current in the cable, and then power the semiconductor refrigeration chip through the current transformer 100, and the refrigeration chip starts working. Then the temperature sensor monitors the internal temperature of the shell 150 and sends the data to the controller device. Finally, the controller device controls the working state of the refrigeration chip according to the data of the temperature sensor to ensure that the temperature at the cable joint is within a safe range.

[0046] The cable limiter of this embodiment effectively addresses the issues of poor heat dissipation and shortened lifespan caused by intercore entanglement when connecting multi-core cables. It also mitigates damage to switch copper busbars caused by intercore stress, improving the overall efficiency and safety of energy storage power stations. By utilizing a PEEK housing 150 and a mortise-and-tenon design, the device exhibits high corrosion resistance, aging resistance, flame retardancy, insulation, mechanical strength, and excellent scalability.

[0047] The embodiments of the present invention are described in detail above with reference to the accompanying drawings. However, the present invention is not limited to the above embodiments. Various changes can be made within the scope of knowledge possessed by ordinary technicians in the relevant technical field without departing from the purpose of the present invention.

Claims

1. A cable limiter for limiting the position of multi-core cables, characterized in that: include: The limiting device includes a housing, the housing is provided with a plurality of limiting holes, the limiting holes are adapted to the shape of the cables, and the cables are inserted into the limiting holes to prevent the cables from being entangled with each other; A current transformer is disposed inside the housing and is used to obtain electricity from the cable; a refrigeration device, disposed in the housing, the refrigeration device being electrically connected to the current transformer, the current transformer being used to supply power to the refrigeration device; A controller device is electrically connected to the current transformer and the refrigeration device, and the controller device controls the working state of the refrigeration device.

2. A cable limiter according to claim 1, characterized in that: A first connecting portion and a second connecting portion are respectively provided on both sides of the shell, and the first connecting portion and the second connecting portion are suitable for splicing two cable limiters.

3. A cable limiter according to claim 2, characterized in that: A plurality of threaded connection holes are provided on the first connection portion and the second connection portion, and the threaded connection holes are suitable for splicing two cable limiters.

4. A cable limiter according to claim 2, characterized in that: Rivet buckle components are respectively provided on both sides of the first connecting portion and the second connecting portion.

5. A cable limiter according to claim 1, characterized in that: The controller device further includes a temperature sensor, which is disposed in the housing and electrically connected to the controller device. The controller device controls the operating state of the refrigeration device according to the temperature measured by the temperature sensor.

6. A cable limiter according to claim 1, characterized in that: The refrigeration device is a semiconductor refrigeration plate, the shape of the semiconductor refrigeration plate is adapted to the shape of the shell, and the cooling end of the semiconductor refrigeration plate is arranged corresponding to the limiting hole.

7. A cable limiter according to claim 1, characterized in that: The limiting hole is a through hole.

8. The cable limiter according to claim 1, characterized in that: The shell is made of insulating material.

9. A cable limiter according to claim 8, characterized in that: The insulating material is polyetheretherketone.

10. The cable limiter according to claim 1, characterized in that: The limiting device is provided with three limiting holes.

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