Cable defect control switching unit

Abstract

The utility model provides a cable defect control switching unit, which belongs to the technical field of cable defect simulation devices and comprises at least two switching devices, and each switching device is provided with a main cable joint and at least two branch cable joints. All the branch cable joints on the same switching device are connected in parallel with the corresponding main cable joints through conductor assemblies, and the conductor assembly connected with each branch cable joint is provided with an isolation change-over switch; and a defect module is communicated between the branch cable joints on the two switching devices through branch loop cables. The beneficial effects of the utility model lie in that the flexible switching of one or more defect modules can be realized, so as to optimize the cable defect switching work and simplify the cable defect switching operation.

Description

Technical Field

[0001] The utility model belongs to the technical field of cable defect simulation devices, and particularly relates to a cable defect control switching unit. Background Art

[0002] Cables are key equipment for reliable power supply in power systems and large urban power grids. Moreover, during the long-term operation of cables, cables are prone to various defects due to factors such as electric fields, thermal effects, mechanical stresses, chemical corrosion, and environmental conditions.

[0003] In order to help designers and manufacturers more accurately understand the specific impact of defects on cable performance, and to provide intuitive and accurate fault phenomena and characteristics for maintenance personnel, cable defect simulation devices have been widely used in power grid systems. And it can simulate various possible defects in cables (such as insulation scratches, impurities, insulation moisture, semiconductor tips, etc.), calculate and display the impact of these defects on the distribution of the electric field and temperature field of the cable, so as to improve the professional skills of relevant staff, and provide strong support for the design and manufacture, maintenance and overhaul, and improvement of the safety and reliability of the cable system, thereby helping to reduce the cable failure rate and improve the reliability and stability of power supply.

[0004] However, since most current cable defect simulation devices use separate defect modules for testing, although they can also achieve testing, there are still certain defects: due to the lack of switching functions, each defect module in the selected defect modules can only achieve one defect, so it can neither meet the random switching of different defects nor the combination of multiple defect modules at will. Moreover, complex circuit assembly work is required when switching different defect modules. Summary of the Utility Model

[0005] The technical problem solved by the utility model is to provide a cable defect control switching unit with a switching function, and enable it to flexibly switch one or more defect modules, so as to optimize the cable defect switching work and simplify the cable defect switching operation.

[0006] To solve the above technical problems, the technical solution provided by the present utility model is as follows: A cable defect control switching unit, which includes two switching devices. Each switching device is provided with a main cable joint and at least two shunt cable joints. All the shunt cable joints on the same switching device are connected to the corresponding main cable joint through a conductor assembly, and all the shunt cable joints on the same switching device are arranged in parallel. An isolation switching switch is provided for each conductor assembly connected to a shunt cable joint. The shunt cable joints between the two switching devices are connected through a shunt circuit cable to a defect module. When the present utility model is applied to corresponding simulation tests in an existing cable simulation device, all the defect modules that will be used can be directly installed between the two switching devices. In this way, when it is necessary to replace the defect module, only the corresponding isolation switching switch needs to be operated to realize the replacement of the defect module in the entire simulation test circuit, without the need for cumbersome disassembly and assembly operations of the defect module, thereby simplifying the cable defect switching operation and the entire test process. At the same time, it can also flexibly combine different defect modules by operating the corresponding isolation switching switch to meet various test requirements.

[0007] Further, the main cable joint and the shunt cable joint are respectively arranged at both ends of the switching device and are respectively connected to the corresponding cables.

[0008] Further, the switching device includes a box body filled with inert gas. The main cable joint and the shunt cable joint are respectively installed at both ends of the box body. The operating end of the isolation switching switch is installed on the outer wall of the middle part of the box body. The triggering end of the isolation switching switch and the conductor assembly are installed in the box body and are protected by the inert gas.

[0009] Further, the outer wall of the box body is provided with an inflation port, and an inflation valve is installed in the inflation port, and inert gas can be filled into the box body through the inflation valve.

[0010] Further, the conductor assembly includes a main conductor and a shunt conductor. One end of the main conductor is electrically connected to the main cable joint, and the other end of the main conductor is electrically connected to the static contact of the isolation switching switch. One end of the shunt conductor is electrically connected to the corresponding shunt cable joint, and the other end of the shunt conductor is electrically connected to the moving contact of the isolation switching switch, and the connection and disconnection between the main conductor and the shunt conductor can be realized through the opening and closing of the isolation switching switch.

[0011] Further, each switching device is provided with three shunt cable joints and three isolation switching switches, and all the shunt cable joints are evenly distributed at the end of the switching device, and all the isolation switching switches are evenly surrounded around the middle of the switching device.

[0012] As can be seen from the above technical solutions, the present utility model has the following advantages: when the existing cable simulation device applies the present utility model to conduct corresponding simulation tests, all defective modules that will be used can be directly installed between the two switching devices. And when it is necessary to replace the defective module, only the corresponding isolation switch needs to be operated to achieve the replacement of the defective module in the entire simulation test circuit, without the need for cumbersome disassembly and assembly operations of the defective module, thereby simplifying the switching operation of cable defects and the entire test process. At the same time, it can also flexibly combine different defective modules by operating the corresponding isolation switch to meet various test requirements. BRIEF DESCRIPTION OF THE DRAWINGS

[0013] In order to more clearly illustrate the technical solutions of the present utility model, the drawings required for description will be briefly introduced below. Obviously, the drawings in the following description are only some embodiments of the present utility model. For those of ordinary skill in the art, other drawings can be obtained based on these drawings without creative efforts.

[0014] Figure 1 It is a schematic structural diagram of the specific embodiment of the present utility model.

[0015] In the figure: 1, main circuit cable; 2, box body; 3, inflation valve; 4, isolation switch; 5, shunt cable joint; 6, shunt circuit cable; 7, defective module; 8, main cable joint. SPECIFIC EMBODIMENTS

[0016] The technical solutions in the embodiments of the present utility model will be clearly and completely described below with reference to the drawings in the embodiments of the present utility model. Obviously, the described embodiments are only a part of the embodiments of the present utility model, rather than all of the embodiments. All other embodiments obtained by those of ordinary skill in the art based on the embodiments of the present utility model without creative efforts shall fall within the protection scope of the present utility model.

[0017] As Figure 1 shown, the present utility model provides a cable defect control switching unit, which includes two switching devices. Each switching device is provided with a main cable joint 8 and at least two shunt cable joints 5. The main cable joint 8 and the shunt cable joints 5 are respectively arranged at both ends of the switching device and are respectively used for connecting with the corresponding main circuit cable 1 and shunt circuit cable 6. Moreover, the shunt cable joints 5 on the two switching devices are connected with a defective module 7 through a shunt circuit cable 6. All the shunt cable joints 5 on the same switching device are connected to the corresponding main cable joint 8 through a conductor assembly, and all the shunt cable joints 5 on the same switching device are arranged in parallel. An isolation switch 4 is provided on the conductor assembly connected to each shunt cable joint 5.

[0018] Specifically, the switching device includes a box body 2 filled with inert gas. An air inlet is provided on the outer wall of the box body 2, and an air filling valve 3 is installed in the air inlet. Moreover, the main cable joint 8 and the shunt cable joint 5 are respectively installed at both ends of the box body 2. The operating end of the isolating switch 4 is installed on the outer wall in the middle of the box body 2. The triggering end and the conductor assembly of the isolating switch 4 are installed inside the box body 2 and are protected by inert gas.

[0019] The conductor assembly includes a main conductor and a shunt conductor. One end of the main conductor is electrically connected to the main cable joint 8, and the other end of the main conductor is electrically connected to the static contact of the isolating switch 4. One end of the shunt conductor is electrically connected to the corresponding shunt cable joint 5, and the other end of the shunt conductor is electrically connected to the moving contact of the isolating switch 4. The connection and disconnection between the main conductor and the shunt conductor can be realized by opening and closing the isolating switch 4.

[0020] When the existing cable simulation device applies the present utility model to conduct corresponding simulation tests, all the defective modules 7 that will be applied can be directly installed between two switching devices. When it is necessary to replace the defective module 7, only the corresponding isolating switch 4 needs to be operated to realize the replacement of the defective module 7 in the entire simulation test circuit, without the need for cumbersome disassembly and assembly operations of the defective module 7 during the entire simulation test process, thereby simplifying the cable defect switching operation and the entire test process. At the same time, different defective modules 7 can be flexibly combined by operating the corresponding isolating switch 4 to meet various test requirements.

[0021] The terms "first", "second", "third", "fourth", etc. (if any) in the specification, claims and above-mentioned drawings of the present utility model are used to distinguish similar objects and do not necessarily need to describe a specific order or sequence. It should be understood that such used data can be interchanged under appropriate circumstances so that the embodiments of the present utility model described herein can be implemented in an order different from those illustrated or described herein. In addition, the terms "comprising" and "having" and any variations thereof are intended to cover non-exclusive inclusion.

[0022] The above description of the disclosed embodiments enables those skilled in the art to implement or use the present utility model. Various modifications to these embodiments will be obvious to those skilled in the art, and the general principles defined herein can be implemented in other embodiments without departing from the spirit or scope of the present utility model. Therefore, the present utility model will not be limited to the embodiments shown herein, but will be accorded the widest scope consistent with the principles and novel features disclosed herein.

Claims

1. A cable defect control switching unit, characterized in that, It includes two switching devices. Each switching device is provided with a main cable joint (8) and at least two shunt cable joints (5). All the shunt cable joints (5) on the same switching device are connected to the corresponding main cable joint (8) through a conductor assembly, and all the shunt cable joints (5) on the same switching device are arranged in parallel. An isolation switch (4) is provided for each conductor assembly connected to a shunt cable joint (5); the shunt cable joints (5) on the two switching devices are connected to a defective module (7) through a shunt circuit cable (6).

2. The cable defect control switching unit according to claim 1, characterized in that, The main cable joint (8) and the shunt cable joint (5) are respectively arranged at both ends of the switching device.

3. The cable defect control switching unit according to claim 1, wherein The switching device includes a box body (2). The box body (2) is filled with an inert gas. The main cable joint (8) and the shunt cable joint (5) are respectively installed at both ends of the box body (2). The operating end of the isolation switch (4) is installed on the outer wall of the middle part of the box body (2), and the trigger end and the conductor assembly of the isolation switch (4) are installed inside the box body (2).

4. The cable defect control switching unit according to claim 3, wherein An inflation port is provided on the outer wall of the box body (2), and an inflation valve (3) is installed in the inflation port.

5. The cable defect control switching unit according to claim 1, characterized in that, The conductor assembly includes a main conductor and a shunt conductor. One end of the main conductor is electrically connected to the main cable joint (8), and the other end of the main conductor is electrically connected to the static contact of the isolation switch (4); one end of the shunt conductor is electrically connected to the corresponding shunt cable joint (5), and the other end of the shunt conductor is electrically connected to the moving contact of the isolation switch (4).

6. The cable defect control switching unit according to claim 1, characterized in that, Each switching device is provided with three shunt cable joints (5) and three isolation switches (4), and all the shunt cable joints (5) are evenly distributed at the end of the switching device, and all the isolation switches (4) are evenly arranged around the middle part of the switching device.

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