A low voltage three-phase unbalanced line changing device

Abstract

The present invention belongs to the technical field of cables, and in particular, relates to a low-voltage three-phase unbalanced line-changing device, comprising: an installation component, comprising an assembly part, an additional part and a fixing part, the additional part is arranged on the assembly part, and the fixing part is arranged on the assembly part; a positioning component, comprising a limiting part and a penetration part, the limiting part is arranged on the fixing part, and the penetration part is arranged on the limiting part; a line-changing component, comprising an accommodating part, an auxiliary part and a guiding part, the accommodating part is arranged on the penetration part, the auxiliary part is arranged on the accommodating part, and the guiding part is arranged on the accommodating part. Through the preliminary construction of the installation component, part of the device can be installed on the cable, and then through the matching of the positioning component, the equipment for guiding the cable to pass through can be installed on the installation component. Finally, the use of the line-changing component can enable the entire device to completely change the active winding phase of the cable and effectively adjust the distribution of the three-phase cable.

Description

Technical Field

[0001] The invention relates to the technical field of cables, and in particular to a low-voltage three-phase unbalanced line-changing device. Background Art

[0002] With the rapid development of the economy and the increasing indispensability of electricity in people's daily lives, it is particularly important to ensure the stability and reliability of power supply. In the current power consumption environment, in order to meet the growing electricity demand of residents and ensure the stability of power supply, improving the quality of electricity has become an important challenge faced by operators.

[0003] Especially when the power supply user group is complex and diverse, covering multiple fields such as production electricity, agricultural and fishery irrigation electricity, and residential electricity. This diversified electricity consumption model often leads to the problem of low-voltage three-phase voltage imbalance, making the power supply operation unstable. Summary of the invention

[0004] In view of the fact that the power supply user groups mentioned above are complex and diverse, covering multiple fields such as production electricity, agricultural and fishery irrigation electricity, and residential electricity. This diversified electricity consumption mode often leads to the problem of low-voltage three-phase voltage imbalance, making the power supply operation unstable. The present invention is proposed.

[0005] Therefore, an object of the present invention is to provide a low-voltage three-phase unbalanced line changing device.

[0006] In order to solve the above technical problems, the present invention provides the following technical solutions: comprising:

[0007] The installation assembly comprises an assembly part, an additional part and a fixing part, wherein the additional part is arranged on the assembly part and the fixing part is arranged on the assembly part;

[0008] A positioning assembly, comprising a limiting member and a penetrating member, wherein the limiting member is arranged on the fixing member, and the penetrating member is arranged on the limiting member; and

[0009] The line changing assembly comprises a receiving part, an auxiliary part and a guiding part, wherein the receiving part is arranged on the penetration part, the auxiliary part is arranged on the receiving part, and the guiding part is arranged on the receiving part.

[0010] As a preferred solution of a low-voltage three-phase unbalanced line changing device described in the present invention, wherein: the assembly includes a first assembly block, a fixed rod, and a second assembly block, the number of the first assembly block and the second assembly block is several, the cross-section of the first assembly block is an inverted trapezoidal structure, one side of the first assembly block is a horizontal plane and the other side is an inclined plane, so that the inclined surface of the first assembly block makes the width of the entire first assembly block gradually increase, the fixed rod is connected to the bottom side of the first assembly block by threaded rotation, the second assembly block has the same structure as the first assembly block, and is arranged opposite to the first assembly block, that is, it is connected to the other side of the fixed rod by threaded rotation, so that the structure composed of the first assembly block, the second assembly block and the fixed rod will make the width of the entire space gradually increase from top to bottom.

[0011] As a preferred solution of a low-voltage three-phase unbalanced line changing device described in the present invention, wherein: the additional component includes a roller and an extension shaft, the roller is rotatably connected to the fixed rod, and a groove is left in the middle of the roller to facilitate the passage of the cable. Due to the width between the first assembly block and the second assembly block, a certain height difference is left between the roller and the top side of the first assembly block, and the height difference is convenient for the passage of the cable. The extension shaft is plugged into the second assembly block, and the other side of the extension shaft is used to be plugged into another first assembly block to increase the length of the connection between the first assembly block and the second assembly block, and no roller is arranged on the extension shaft.

[0012] As a preferred solution of a low-voltage three-phase unbalanced line changing device described in the present invention, wherein: the fixing part includes a left fixing plate and a right fixing plate, and the left fixing plate and the right fixing plate are two "L" structures arranged opposite to each other, and the left fixing plate is fixedly connected to a number of upper left positions of an overall structure with a certain length composed of a first assembly block and a second assembly block by a nut, and the right fixing plate is fixedly connected to a number of upper right positions of an overall structure with a certain length composed of a first assembly block and a second assembly block by a nut.

[0013] As a preferred solution of the low-voltage three-phase unbalanced line-changing device described in the present invention, the installation components consisting of the assembly parts, the additional parts and the fixing parts appear in pairs, which is convenient for installation at a certain position of the cable.

[0014] As a preferred solution of a low-voltage three-phase unbalanced line changing device described in the present invention, wherein: the limiting member includes a first limiting plate and a second limiting plate, the first limiting plate and the second limiting plate are arranged between two fixing members and are connected by a cable, the first limiting plate and the second limiting plate are composed of two facing "L" structures, and a certain distance is left between the first limiting plate and the second limiting plate.

[0015] As a preferred solution of a low-voltage three-phase unbalanced line changing device described in the present invention, wherein: the penetration member includes a first through slot, a second through slot and a third through slot, the first through slot, the second through slot and the third through slot are all opened on the first limiting plate and the second limiting plate, and the slot spacing is equidistantly arranged between the first limiting plate and the second limiting plate.

[0016] As a preferred solution of a low-voltage three-phase unbalanced line changing device described in the present invention, wherein: the accommodating part includes a first wire frame, a second wire frame and a guide wire frame, one side of the first wire frame, the second wire frame and the third wire frame respectively penetrate through the corresponding first through groove, the second through groove and the third through groove on the first limiting plate to reach the second through groove, the third through groove and the first through groove on the second limiting plate, and the first wire frame, the second wire frame and the guide wire frame are all wavy structures, the inclination angle and direction of the wave curves of the first wire frame and the second wire frame are the same, the wave curve span of the guide wire frame is larger, and the top view structure of the guide wire frame and the first wire frame is an "X" structure.

[0017] As a preferred solution of a low-voltage three-phase unbalanced line changing device described in the present invention, the auxiliary component includes an avoidance groove, which is opened on the upper side of the guide wire frame. The width of the avoidance groove allows the first wire frame and the second wire frame to be superimposed on the guide wire frame from the upper side without affecting the penetration of the cable.

[0018] As a preferred solution of a low-voltage three-phase unbalanced line changing device described in the present invention, wherein: the guide member includes a first wire trough, a second wire trough and a guide groove, the first wire trough is opened at the lower side of the first wire frame, the second wire trough is opened at the lower side of the second wire frame, and the guide groove is opened at the lower side of the guide wire frame, which facilitates the passage of the cable.

[0019] The beneficial effects of the present invention are as follows: through the preliminary construction of the installation component, part of the device can be installed on the cable, and then through the matching of the positioning component, the device for guiding the cable to pass through can be installed on the installation component. Finally, the use of the line change component can make the entire device completely change the active winding phase of the cable. A set of such low-voltage three-phase unbalanced line change device is installed at a certain distance to ensure that the three-phase cables can be distributed in a balanced manner, thereby realizing active three-phase balance adjustment;

[0020] The design of this device can effectively solve the problem of low-voltage three-phase voltage imbalance, improve the stability of power supply, and provide better quality and more reliable power services for various users. This is not only an effective response to the pain points and difficulties of operators, but also an important improvement in the quality of power supply, which is of great significance to promoting the stable development of the regional economy.

[0021] Realize the three-phase balanced regulation of the entire power grid. This mechanism innovation can not only solve the local three-phase imbalance problem in a timely and effective manner, but also optimize the stability and power supply quality of the power grid as a whole. At the same time, this mechanism also improves the flexibility and scalability of the device, enabling it to adapt to power grid environments of different scales and complexities;

[0022] The device can actively adjust the three-phase cable distribution to achieve balance, reduce voltage fluctuations and equipment overheating risks, and thus reduce power loss and equipment damage. In the construction of smart grids, the device can monitor and automatically adjust the power grid in real time, providing important support for it. In addition, it is in line with national policy orientation and is expected to receive more support. In short, the low-voltage three-phase unbalanced line switching device has significant advantages in improving power system efficiency, extending equipment life, promoting the development of smart grids and responding to national policies, and has broad application prospects in the future. This device will become an indispensable part of the power system, providing better quality and more reliable power services for all types of users. BRIEF DESCRIPTION OF THE DRAWINGS

[0023] In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the following briefly introduces the drawings required for use in the description of the embodiments. Obviously, the drawings described below are only some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without creative work.

[0024] Figure 1 It is a schematic diagram of the overall front structure of a low-voltage three-phase unbalanced line changing device of the present invention.

[0025] Figure 2 The figure is a schematic diagram of the overall reverse structure of a low-voltage three-phase unbalanced line-changing device of the present invention.

[0026] Figure 3 The present invention is a schematic diagram of the structure of an installation component of a low-voltage three-phase unbalanced line-changing device.

[0027] Figure 4 The present invention is a schematic diagram of the structure of a positioning component of a low-voltage three-phase unbalanced line-changing device.

[0028] Figure 5 This is a schematic diagram of the front disassembled structure of a line-changing assembly of a low-voltage three-phase unbalanced line-changing device according to the present invention.

[0029] Figure 6 This is a schematic diagram of the disassembled structure of the reverse side of a line-changing component of a low-voltage three-phase unbalanced line-changing device according to the present invention. DETAILED DESCRIPTION

[0030] In order to make the above-mentioned objects, features and advantages of the present invention more obvious and easy to understand, the specific implementation methods of the present invention are described in detail below in conjunction with the accompanying drawings.

[0031] In the following description, many specific details are set forth to facilitate a full understanding of the present invention, but the present invention may also be implemented in other ways different from those described herein, and those skilled in the art may make similar generalizations without violating the connotation of the present invention. Therefore, the present invention is not limited to the specific embodiments disclosed below.

[0032] Secondly, the term "one embodiment" or "embodiment" as used herein refers to a specific feature, structure, or characteristic that may be included in at least one implementation of the present invention. The term "in one embodiment" that appears in different places in this specification does not necessarily refer to the same embodiment, nor is it a separate or selective embodiment that is mutually exclusive with other embodiments.

[0033] Secondly, the present invention is described in detail with reference to the schematic diagram. When describing the embodiments of the present invention in detail, for the sake of convenience, the cross-sectional diagrams showing the device structure will not be partially enlarged according to the general scale, and the schematic diagrams are only examples, which should not limit the scope of protection of the present invention. In addition, in actual production, the three-dimensional dimensions of length, width and depth should be included.

[0034] Example 1

[0035] Reference Figure 1 - Figure 3 , which is the first embodiment of the present invention, provides a low-voltage three-phase unbalanced line changing device, which includes an installation component 100, including an assembly part 101, an additional part 102 and a fixing part 103, the additional part 102 is arranged on the assembly part 101, and the fixing part 103 is arranged on the assembly part 101. The installation component 100 composed of the assembly part 101, the additional part 102 and the fixing part 103 appears in pairs, which is convenient for installation at a certain position of the cable.

[0036] Specifically, the assembly 101 includes a first assembly block 101a, a fixing rod 101b, and a second assembly block 101c. There are several first assembly blocks 101a and second assembly blocks 101c. The cross-section of the first assembly block 101a is an inverted trapezoidal structure. One side of the first assembly block 101a is a horizontal plane and the other side is an inclined plane. In this way, the inclined surface of the first assembly block 101a makes the width of the entire first assembly block 101a gradually increase. The fixing rod 101b is connected to the bottom side of the first assembly block 101a by threaded rotation. The second assembly block 101c has the same structure as the first assembly block 101a and is arranged opposite to the first assembly block 101a, that is, it is connected to the other side of the fixing rod 101b by threaded rotation. In this way, the structure composed of the first assembly block 101a, the second assembly block 101c and the fixing rod 101b will make the width of the entire space gradually increase from top to bottom.

[0037] Furthermore, the additional member 102 includes a roller 102a and an extension shaft 102b. The roller 102a is rotatably connected to the fixed rod 101b. A groove is left in the middle of the roller 102a to facilitate the passage of the cable. Due to the width between the first assembly block 101a and the second assembly block 101c, a certain height difference is left between the roller 102a and the top side of the first assembly block 101a. The height difference is convenient for the passage of the cable. The extension shaft 102b is plugged into the second assembly block 101c, and the other side of the extension shaft 102b is used to be plugged into another first assembly block 101a, thereby increasing the length of the connection between the first assembly block 101a and the second assembly block 101c, and the roller 102a is not provided on the extension shaft 102b.

[0038] Furthermore, the fixing member 103 includes a left fixing plate 103a and a right fixing plate 103b. The left fixing plate 103a and the right fixing plate 103b are two "L" structures arranged opposite to each other. The left fixing plate 103a is fixedly connected to a number of upper left positions of the overall structure with a certain length formed by the first assembly block 101a and the second assembly block 101c by nuts, and the right fixing plate 103b is fixedly connected to a number of upper right positions of the overall structure with a certain length formed by the first assembly block 101a and the second assembly block 101c by nuts.

[0039] During the operation, the first assembly block 101a is placed on the cable, the fixing rod 101b is connected to the bottom side of the first assembly block 101a by rotating the thread, the second assembly block 101c is placed opposite to the first assembly block 101a, and the inclined surfaces of the two assembly blocks are ensured to be opposite to each other. The second assembly block 101c is connected to the other side of the fixing rod 101b by rotating the thread, and the distance between the first assembly block 101a and the second assembly block 101c is adjusted by rotating the fixing rod 101b, so that the width of the whole structure gradually increases from top to bottom, wherein the roller 102a can be first Rotate and connect it to the fixing rod 101b, ensure that the groove in the middle of the roller 102a is convenient for the cable to pass through, plug the extension shaft 102b into the second assembly block 101c, ensure that its other side can be plugged into another first assembly block 101a, and increase the length of the connection between the first assembly block 101a and the second assembly block 101c by extending the shaft 102b, place the left fixing plate 103a and the right fixing plate 103b on the upper left and upper right sides of the overall structure respectively, and fix the left fixing plate 103a and the right fixing plate 103b with nuts to ensure the stability of the structure.

[0040] Example 2

[0041] Reference Figure 1 - Figure 4 , which is the second embodiment of the present invention. This embodiment is different from the first embodiment in that: this device includes a positioning assembly 200, including a limiting member 201 and a penetration member 202, the limiting member 201 is arranged on the fixing member 103, and the penetration member 202 is arranged on the limiting member 201.

[0042] Specifically, the limiting member 201 includes a first limiting plate 201a and a second limiting plate 201b. The first limiting plate 201a and the second limiting plate 201b are arranged between the two fixing members 103 and are connected by a cable. The first limiting plate 201a and the second limiting plate 201b are composed of two opposing "L" structures, and a certain distance is left between the first limiting plate 201a and the second limiting plate 201b.

[0043] Furthermore, the through-piece 202 includes a first through-groove 202a, a second through-groove 202b and a third through-groove 202c. The first through-groove 202a, the second through-groove 202b and the third through-groove 202c are all opened on the first limiting plate 201a and the second limiting plate 201b, and the groove distance is equidistantly arranged between the first limiting plate 201a and the second limiting plate 201b.

[0044] The remaining structure is the same as that of the embodiment.

[0045] Operation process: After installing one installation assembly 100, the first limiting plate 201a and the second limiting plate 201b can be moved into the two installation assemblies 100 through cables.

[0046] Example 3

[0047] Reference Figure 1 - Figure 6 , which is the third embodiment of the present invention. This embodiment is different from the second embodiment in that: this device includes a line changing assembly 300, including a receiving part 301, an auxiliary part 302 and a guiding part 303, the receiving part 301 is arranged on the penetration part 202, the auxiliary part 302 is arranged on the receiving part 301, and the guiding part 303 is arranged on the receiving part 301.

[0048] Specifically, the accommodating member 301 includes a first wire frame 301a, a second wire frame 301b and a guide wire frame 301c, and one side of the first wire frame 301a, the second wire frame 301b and the third wire frame respectively penetrate through the corresponding first through groove 202a, the second through groove 202b and the third through groove 202c on the first limiting plate 201a to reach the second through groove 202b, the third through groove 202c and the first through groove 202a on the second limiting plate 201b, and the first wire frame 301a, the second wire frame 301b and the guide wire frame 301c are all wave structures, the inclination angle and direction of the wave curves of the first wire frame 301a and the second wire frame 301b are the same, the wave curve of the guide wire frame 301c has a larger span, and the top view structure of the guide wire frame 301c and the first wire frame 301a is an "X" structure.

[0049] Furthermore, the auxiliary component 302 includes an avoidance groove 302a, which is opened on the upper side of the guide wire frame 301c. The width of the avoidance groove 302a allows the first wire frame 301a and the second wire frame 301b to overlap on the guide wire frame 301c from the upper side without affecting the penetration of the cable.

[0050] Furthermore, the guide member 303 includes a first wire groove 303a, a second wire groove 303b and a guide groove 303c. The first wire groove 303a is opened at the lower side of the first wire frame 301a, the second wire groove 303b is opened at the lower side of the second wire frame 301b, and the guide groove 303c is opened at the lower side of the guide wire frame 301c, so as to facilitate the passage of the cable.

[0051] The remaining structure is the same as that of the embodiment.

[0052] Operation steps: The first wire frame 301a, the second wire frame 301b and the guide wire frame 301c are installed through the first through slot 202a, the second through slot 202b and the third through slot 202c on the first limiting plate 201a and the second limiting plate 201b and the avoidance slot 302a on the guide wire frame 301c to realize the restriction on the cable position, and realize the flexible winding and phase change operation of the three-phase cable. This structural design is not only simple and easy, but also has high adjustability and adaptability. It can be flexibly adjusted according to actual needs, effectively adjust the distribution of the three-phase cables, ensure the balanced distribution of the three-phase cables, install a set of devices at a certain distance, and realize the segmented three-phase balanced regulation of the entire power grid. This distributed balancing regulation method can timely and effectively solve the local three-phase imbalance problem, and improve the stability and power supply quality of the power grid as a whole.

[0053] Importantly, it should be noted that the construction and arrangement of the present application shown in a plurality of different exemplary embodiments are only exemplary. Although only a few embodiments are described in detail in this disclosure, it should be readily understood by those who refer to this disclosure that many modifications are possible (e.g., the size, scale, structure, shape and proportion of various elements, as well as parameter values ​​(e.g., temperature, pressure, etc.), mounting arrangements, use of materials, color, directional changes, etc.) without substantially departing from the novel teachings and advantages of the subject matter described in the application. For example, the element shown as integrally formed can be composed of multiple parts or elements, the position of the element can be inverted or otherwise changed, and the nature or number or position of the discrete element can be changed or changed. Therefore, all such modifications are intended to be included in the scope of the present invention. The order or sequence of any process or method steps can be changed or reordered according to alternative embodiments. In the claims, any "device plus function" clause is intended to cover the structure described herein that performs the function, and is not only structurally equivalent but also equivalent structure. Without departing from the scope of the present invention, other replacements, improvements, changes and omissions can be made in the design, operating conditions and arrangement of the exemplary embodiments. Therefore, the invention is not limited to a specific embodiment, but extends to numerous modifications still falling within the scope of the appended claims.

[0054] Additionally, in order to provide a concise description of exemplary embodiments, all features of an actual embodiment (ie, those features that are not relevant to the best mode presently contemplated for carrying out the invention or those that are not relevant to implementing the invention) may not be described.

[0055] It should be understood that in the development of any actual implementation, as in any engineering or design project, numerous implementation-specific decisions may be made. Such a development effort may be complex and time-consuming, but for those of ordinary skill having the benefit of this disclosure, without undue experimentation, the development effort will be a routine task of design, fabrication, and production.

[0056] It should be noted that the above embodiments are only used to illustrate the technical solutions of the present invention rather than to limit it. Although the present invention has been described in detail with reference to the preferred embodiments, those skilled in the art should understand that the technical solutions of the present invention may be modified or replaced by equivalents without departing from the spirit and scope of the technical solutions of the present invention, which should all be included in the scope of the claims of the present invention.

Claims

1. A low voltage three-phase unbalanced line switching device, characterized in that: include, A mounting assembly (100) comprises an assembly part (101), an additional part (102) and a fixing part (103), wherein the additional part (102) is arranged on the assembly part (101), and the fixing part (103) is arranged on the assembly part (101); A positioning assembly (200) comprises a limiting member (201) and a penetration member (202), wherein the limiting member (201) is arranged on the fixing member (103), and the penetration member (202) is arranged on the limiting member (201); and, The line changing assembly (300) comprises a receiving component (301), an auxiliary component (302) and a guiding component (303); the receiving component (301) is arranged on the penetration component (202); the auxiliary component (302) is arranged on the receiving component (301); and the guiding component (303) is arranged on the receiving component (301).

2. The low-voltage three-phase unbalanced line switching device according to claim 1 is characterized in that: The assembly (101) comprises a first assembly block (101a), a fixing rod (101b), and a second assembly block (101c). The first assembly block (101a) and the second assembly block (101c) are in multiple numbers. The cross section of the first assembly block (101a) is an inverted trapezoidal structure. One side of the first assembly block (101a) is a horizontal plane and the other side is an inclined plane. Thus, the inclined plane of the first assembly block (101a) makes the width of the entire first assembly block (101a) gradually increase. The fixing rod (101b) is connected to the bottom side of the first assembly block (101a) by means of a threaded rotation. The second assembly block (101c) has the same structure as the first assembly block (101a) and is arranged opposite to the first assembly block (101a), that is, it is connected to the other side of the fixing rod (101b) by means of a threaded rotation. In this way, the structure composed of the first assembly block (101a), the second assembly block (101c) and the fixing rod (101b) will gradually increase the width of the entire space from top to bottom.

3. The low-voltage three-phase unbalanced line switching device according to claim 2 is characterized in that: The additional member (102) comprises a roller (102a) and an extension shaft (102b); the roller (102a) is rotatably connected to the fixed rod (101b); a groove is left in the middle of the roller (102a) for the convenience of the cable to pass through; due to the width between the first assembly block (101a) and the second assembly block (101c), a certain height difference is left between the roller (102a) and the top side of the first assembly block (101a); the height difference is convenient for the cable to pass through; the extension shaft (102b) is plugged into the second assembly block (101c); the other side of the extension shaft (102b) is used to be plugged into another first assembly block (101a), thereby increasing the length of the connection between the first assembly block (101a) and the second assembly block (101c); and the roller (102a) is not provided on the extension shaft (102b).

4. The low-voltage three-phase unbalanced line switching device according to claim 2 or 3, characterized in that: The fixing member (103) comprises a left fixing plate (103a) and a right fixing plate (103b), wherein the left fixing plate (103a) and the right fixing plate (103b) are two "L" structures arranged opposite to each other, wherein the left fixing plate (103a) is fixedly connected to a plurality of upper left positions of an overall structure having a certain length formed by the first assembly block (101a) and the second assembly block (101c) by nuts, and the right fixing plate (103b) is fixedly connected to a plurality of upper right positions of an overall structure having a certain length formed by the first assembly block (101a) and the second assembly block (101c) by nuts.

5. The low-voltage three-phase unbalanced line switching device according to claim 4 is characterized in that: The installation assembly (100) consisting of the assembly member (101), the additional member (102) and the fixing member (103) appears in pairs, which is convenient for installation at a certain position of the cable.

6. The low-voltage three-phase unbalanced line switching device according to claim 5 is characterized in that: The limiting member (201) comprises a first limiting plate (201a) and a second limiting plate (201b), wherein the first limiting plate (201a) and the second limiting plate (201b) are arranged between two fixing members (103) and are connected via a cable, wherein the first limiting plate (201a) and the second limiting plate (201b) are composed of two facing "L" structures, and a certain distance is left between the first limiting plate (201a) and the second limiting plate (201b).

7. The low-voltage three-phase unbalanced line switching device according to claim 6 is characterized in that: The penetration member (202) comprises a first penetration groove (202a), a second penetration groove (202b) and a third penetration groove (202c); the first penetration groove (202a), the second penetration groove (202b) and the third penetration groove (202c) are all provided on the first limiting plate (201a) and the second limiting plate (201b), and the groove spacing is equidistantly arranged between the first limiting plate (201a) and the second limiting plate (201b).

8. The low-voltage three-phase unbalanced line switching device according to claim 6 or 7, characterized in that: The accommodating member (301) comprises a first wire frame (301a), a second wire frame (301b) and a guide wire frame (301c), wherein one side of the first wire frame (301a), the second wire frame (301b) and the third wire frame respectively penetrate through the corresponding first through groove (202a), second through groove (202b) and third through groove (202c) on the first limiting plate (201a) to reach the second through groove (202b), the second through groove (202c) and the third through groove (202c) on the second limiting plate (201b). Three through grooves (202c) and a first through groove (202a), and the first wire frame (301a), the second wire frame (301b) and the guide wire frame (301c) are all wave structures, the inclination angle and direction of the wave curves of the first wire frame (301a) and the second wire frame (301b) are the same, the wave curve of the guide wire frame (301c) has a larger span, and the top view structure of the guide wire frame (301c) and the first wire frame (301a) is an "X" structure.

9. The low-voltage three-phase unbalanced line switching device according to claim 8, characterized in that: The auxiliary component (302) includes an avoidance groove (302a), and the avoidance groove (302a) is opened at the upper side of the guide wire frame (301c). The width of the avoidance groove (302a) enables the first wire frame (301a) and the second wire frame (301b) to be superimposed on the guide wire frame (301c) from the upper side without affecting the penetration of the cable.

10. The low-voltage three-phase unbalanced line switching device according to claim 9, characterized in that: The guide member (303) includes a first wire groove (303a), a second wire groove (303b) and a guide groove (303c); the first wire groove (303a) is opened at the lower side of the first wire frame (301a); the second wire groove (303b) is opened at the lower side of the second wire frame (301b); and the guide groove (303c) is opened at the lower side of the guide wire frame (301c), so as to facilitate the passage of cables.

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