Cable branch box

Abstract

The utility model discloses a cable branch box, and relates to the technical field of power equipment, the cable branch box comprises a mounting box, a vertical knife switch, a first busbar and a second busbar, the mounting box is internally provided with an accommodating cavity, the first busbar and the second busbar are both arranged in the accommodating cavity, the first busbar is provided with a first contact end, and the second busbar is provided with a second contact end. The first busbar is provided with a first contact end, the second busbar is provided with a second contact end, the vertical disconnecting link is hinged to the first contact end, the vertical disconnecting link is provided with a contact point, and the contact point is used for abutting against the second contact end. According to the embodiment of the utility model, by adopting the vertical disconnecting link, the transverse size of the cable branch box is reduced, and the longitudinal size of the cable branch box is increased, so that the occupied area is reduced, the civil engineering quantity is reduced, the civil engineering cost and the construction difficulty are reduced, the construction progress of a preassembled station is accelerated, and the construction period is shortened; and through the heightened cable branch box, the operation and maintenance personnel do not need to stoop during operation, so that the comfort and safety of operation are improved.

Description

Technical Field

[0001] The utility model relates to the technical field of power equipment, in particular to a cable branch box. Background Art

[0002] In the fields of power generation, transmission, transformation, and distribution, as well as new energy, prefabricated substations have emerged as a new construction model over the past decade, and their development and application have reached a mature stage. Cable branch boxes, as the cable distribution equipment in prefabricated substations, can transmit high-voltage electricity from the photovoltaic field to the prefabricated substations. Their processing and manufacturing processes are highly standardized. Currently, the most commonly used cable branch boxes on the market are horizontal double-door structures, mostly used in urban power grid construction. Prefabricated substations are often built in plateau environments above 3,000 meters above sea level, requiring customized high-altitude cable branch boxes. However, existing plateau cable branch boxes are all horizontal structures, occupying a large area, resulting in lengthy and costly construction.

[0003] Therefore, how to reduce the floor space of the cable branch box is a problem that needs to be solved urgently. Utility Model Content

[0004] The main purpose of the utility model is to provide a cable branch box, aiming to solve the problem of how to reduce the floor space occupied by the cable branch box.

[0005] To achieve the above-mentioned purpose, the utility model proposes a cable branch box, which includes an installation box, a vertical knife switch, a first busbar and a second busbar. A accommodating cavity is provided in the installation box, and the first busbar and the second busbar are both arranged in the accommodating cavity. A first contact end is provided on the first busbar, and a second contact end is provided on the second busbar. The first contact end and the second contact end are spaced apart along the height direction of the installation box. The vertical knife switch is hinged to the first contact end, and a contact point is provided on the vertical knife switch, and the contact point is used to abut with the second contact end.

[0006] In one embodiment, the second contact end is located below the first contact end.

[0007] In one embodiment, the cable branch box further includes a fan, and the mounting box is further provided with a first mounting hole communicating with the accommodating cavity, and the fan is disposed in the first mounting hole.

[0008] In one embodiment, the cable branch box also includes a vent assembly, and the mounting box is also provided with a second mounting hole connected to the accommodating cavity. The vent assembly includes a louver, a filter and a flange connected in sequence in a direction close to the accommodating cavity, and the flange is arranged in the second mounting hole.

[0009] In one embodiment, the flange includes a main body and a folded edge, the folded edge is connected to the periphery of the main body, and the folded edge extends away from the accommodating cavity, the inner wall of the folded edge is connected to the filter, and the outer wall of the folded edge is connected to the hole wall of the second mounting hole.

[0010] In one embodiment, the installation box includes a box body and a box door assembly, the box door assembly includes an inner door component, the inner door component includes an installation door and a mesh door, the installation door and the mesh door are both connected to the box body, and the box body, the installation door and the mesh door enclose the accommodating cavity; the cable branch box also includes a control system, the control system includes an operation panel and a control cabinet, the operation panel and the control cabinet are both connected to the installation door, the control cabinet is arranged in the accommodating cavity, and the operation panel and the vertical knife switch are both electrically connected to the control cabinet.

[0011] In one embodiment, the box body includes an outer shell layer and an insulation layer arranged in sequence from the outside to the inside, the installation door and the mesh door are both connected to the outer shell layer, and the insulation layer, the installation door and the mesh door enclose the accommodating cavity.

[0012] In one embodiment, the mesh door is rotatably connected to the box body, and the installation box further includes an electromagnetic lock connected to the box body, and the electromagnetic lock is used to limit the rotation of the mesh door relative to the box body.

[0013] In one embodiment, the box door assembly also includes an outer door component, and the outer door component includes a first outer door and a second outer door. The first outer door and the second outer door are both rotatably connected to the box body. The first outer door is arranged along the side of the installation door away from the accommodating cavity, and the second outer door is arranged along the side of the mesh door away from the accommodating cavity.

[0014] In one embodiment, the outer wall of the installation box is provided with a spray paint layer, and the spray paint layer includes an epoxy zinc-rich layer, an epoxy micaceous iron layer and a polyurethane layer arranged in sequence from the inside to the outside.

[0015] In an embodiment of the present utility model, the cable branch box is used for a prefabricated substation, which is suitable for the construction of high-altitude substations and power grids. It is mainly used as a disconnecting device in front of the 35kV high-voltage switchgear when the photovoltaic area enters the booster station. The rated voltage of the cable branch box is 40.5kV, and the maximum operating altitude is 4500m; the first busbar is the incoming busbar, and the second busbar is the outgoing busbar. The vertical knife switch serves as the main switching element, and the circuit can be connected or disconnected by operating the contact point on the vertical knife switch and the abutment state with the second contact end. The installation box serves as the main structure of the entire cable branch box, and is used to install, fix and protect other components in the cable branch box; in this embodiment, by arranging the first contact end on the incoming busbar and the second contact end on the outgoing busbar at intervals along the height direction of the installation box, the closing mode of the vertical knife switch is changed from the traditional horizontal closing to the vertical closing, which reduces the horizontal movement space, comprehensively adjusts the size of the cable branch box, and solves the problem of long construction time and high cost of traditional cable branch boxes, which helps to speed up the construction progress of the prefabricated station. The embodiment of the utility model adopts a vertical knife switch, which reduces the lateral size of the cable branch box and increases the longitudinal size of the cable branch box, thereby reducing the footprint of the entire cable branch box, reducing the corresponding civil engineering work volume, reducing the civil engineering cost and construction difficulty, helping to speed up the construction progress of the pre-installed station, shortening the construction period, improving the overall efficiency of the project, avoiding delays in the completion of the entire station, and ensuring that the project is completed on time; and through the heightened design of the cable branch box, the operation and maintenance personnel do not need to bend over during operation, thereby improving the comfort and safety of operation. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the following briefly introduces the drawings required for use in the embodiments or the description of the prior art. 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 the structures shown in these drawings without paying any creative work.

[0017] Figure 1 This is a cross-sectional view of an embodiment of a cable branch box of the present utility model;

[0018] Figure 2 This is a structural diagram of an embodiment of a vent assembly of a cable branch box of the present invention;

[0019] Figure 3 This is a structural diagram of an embodiment of an inner door component of a cable branch box of the present utility model;

[0020] Figure 4 This is a structural diagram of an embodiment of the outer door component of the cable branch box of the present invention.

[0021] Description of Figure Numbers:

[0022] 100. Cable branch box; 1. Installation box; 11. Accommodation cavity; 12. Box body; 121. Outer shell; 122. Insulation layer; 13. Door assembly; 131. Inner door component; 1311. Installation door; 1312. Net door; 132. Outer door component; 1321. First outer door; 1322. Second outer door; 14. Electromagnetic lock; 2. Vertical knife switch; 21. Contact point; 3. First busbar; 31. First contact terminal; 4. Second Busbar; 41. Second contact terminal; 5. Fan; 6. Vent assembly; 61. Shutter; 62. Filter; 63. Flange; 631. Main body; 632. Folding edge; 7. Control system; 71. Operation panel; 711. Grounding on / off button; 712. Grounding live indicator light; 713. Isolation on / off button; 714. Knife switch live indicator light; 715. Temperature control button; 72. Control cabinet; 8. Lightning rod; 9. Insulator.

[0023] The realization of the purpose, functional features and advantages of the present invention will be further explained in conjunction with embodiments and with reference to the accompanying drawings. DETAILED DESCRIPTION

[0024] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the embodiments described are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without making creative efforts shall fall within the scope of protection of the present invention.

[0025] It should be noted that if the embodiments of the present invention involve directional indications (such as up, down, left, right, front, and back), the directional indications are only used to explain the relative position relationship, movement status, etc. between the various components under a certain specific posture. If the specific posture changes, the directional indications will also change accordingly.

[0026] In addition, if there are descriptions involving "first", "second", etc. in the embodiments of the present invention, the descriptions of "first", "second", etc. are only for descriptive purposes and cannot be understood as indicating or implying their relative importance or implicitly indicating the number of the indicated technical features. Therefore, the features limited to "first" and "second" may explicitly or implicitly include at least one of such features. In addition, if "and / or" or "and / or" appears in the full text, its meaning includes three parallel schemes. Taking "A and / or B" as an example, it includes scheme A, or scheme B, or a scheme in which A and B are satisfied at the same time. In addition, the technical solutions between the various embodiments can be combined with each other, but it must be based on the fact that ordinary technicians in this field can implement it. When the combination of technical solutions is mutually contradictory or cannot be implemented, it should be deemed that such a combination of technical solutions does not exist and is not within the scope of protection required by the present invention.

[0027] In the fields of power generation, transmission, transformation, and distribution, as well as new energy, prefabricated substations have emerged as a new construction model over the past decade, and their development and application have reached a mature stage. Cable branch boxes, as the cable distribution equipment in prefabricated substations, can transmit high-voltage electricity from the photovoltaic field to the prefabricated substations. Their processing and manufacturing processes are highly standardized. Currently, the most commonly used cable branch boxes on the market are horizontal double-door structures, mostly used in urban power grid construction. Prefabricated substations are often built in plateau environments above 3,000 meters above sea level, requiring customized high-altitude cable branch boxes. However, existing plateau cable branch boxes are all horizontal structures, occupying a large area, resulting in lengthy and costly construction.

[0028] After careful study by the applicant, it was found that the horizontal dimension of the horizontal cable branch box is large, resulting in a large footprint, a long construction time and high cost. Although it is flexible to separate and combine, it is built on a large space. For pre-installed stations, this part of the civil engineering content will usually delay the completion of the entire station, and the investment cost is too high; the height of the horizontal cable branch box is usually lower than the height of an adult, and it is generally necessary to bend over during operation and maintenance, which is not friendly to the operation and maintenance personnel; and conventional high-altitude high-voltage cable branch boxes do not have insulation layers and ventilation equipment, and have poor insulation and heat dissipation in the harsh environment of the plateau, and cannot meet the use requirements.

[0029] The main purpose of the utility model is to provide a cable branch box to solve the problem of how to reduce the floor space occupied by the cable branch box.

[0030] See also Figure 1In one embodiment of the utility model, the cable branch box 100 includes an installation box 1, a vertical knife switch 2, a first busbar 3 and a second busbar 4. A accommodating cavity 11 is provided in the installation box 1. The first busbar 3 and the second busbar 4 are both arranged in the accommodating cavity 11. A first contact end 31 is provided on the first busbar 3, and a second contact end 41 is provided on the second busbar 4. The first contact end 31 and the second contact end 41 are spaced apart along the height direction of the installation box 1. The vertical knife switch 2 is hinged to the first contact end 31. A contact point 21 is provided on the vertical knife switch 2, and the contact point 21 is used to abut with the second contact end 41.

[0031] In the embodiment of the present utility model, the cable branch box 100 is used for prefabricated substations, which are suitable for high-altitude substations and power grid construction. It is mainly used as a disconnecting device in front of the switch cabinet when the photovoltaic area enters the 35kV high-voltage switch cabinet of the booster station. The rated voltage of the cable branch box 100 is 40.5kV, and the maximum operating altitude is 4500m; the first busbar 3 is the incoming busbar, the second busbar 4 is the outgoing busbar, and the vertical knife switch 2 is the main switching element. The circuit can be connected or disconnected by operating the contact point 21 on the vertical knife switch 2 and the abutment state with the second contact end 41. Box 1 serves as the main structure of the entire cable branch box 100 and is used to install, fix and protect other components in the cable branch box 100. In this embodiment, by arranging the first contact terminal 31 on the incoming busbar and the second contact terminal 41 on the outgoing busbar at intervals along the height direction of the installation box 1, the closing mode of the vertical knife switch 2 is changed from the traditional horizontal closing to the vertical closing, thereby reducing the horizontal movement space, comprehensively adjusting the size of the cable branch box 100, and solving the problem of the traditional cable branch box 100 being time-consuming and costly in civil construction, which helps to speed up the construction progress of the pre-installation station.

[0032] The technical solution of the present invention reduces the lateral size of the cable branch box 100 and increases the longitudinal size of the cable branch box 100 by adopting a vertical knife switch 2, thereby reducing the footprint of the entire cable branch box 100, reducing the corresponding amount of civil engineering work, reducing civil engineering costs and construction difficulty, helping to speed up the construction progress of the pre-installed station, shorten the construction period, improve the overall efficiency of the project, avoid delays in the completion of the entire station, and ensure that the project is completed on time; and through the heightened design of the cable branch box 100, the operation and maintenance personnel do not need to bend over during operation, thereby improving the comfort and safety of operation.

[0033] In this embodiment, the first busbar 3 and the second busbar 4 can be directly connected to the cavity wall of the accommodating cavity 11, and an insulator 9 can be arranged inside the accommodating cavity 11 to connect to the first busbar 3 and the second busbar 4. This embodiment does not limit the specific installation method of the first busbar 3 and the second busbar 4.

[0034] In one embodiment, the second contact end 41 is located below the first contact end 31; specifically, since the first busbar 3 is the incoming busbar and the second busbar 4 is the outgoing busbar, the second contact end 41 is located below the first contact end 31, so that the vertical knife switch 2 can maintain a certain safety distance from the outgoing busbar after disconnection. This safety distance can prevent the outgoing busbar from being energized due to misoperation or other unexpected situations when the vertical knife switch 2 is disconnected, thereby endangering the safety of the operator. It can also avoid the vertical knife switch 2 from being too close to the outgoing busbar when it is disconnected, resulting in an arc, causing equipment damage or fire, and can also avoid electric shock injuries to the operator caused by the arc.

[0035] In one embodiment, the cable branch box 100 also includes a fan 5, and the installation box 1 is further provided with a first installation hole (not shown in the figure) connected to the accommodating cavity 11, and the fan 5 is arranged in the first installation hole; specifically, the fan 5 can be turned on when needed, and the ventilation and heat dissipation of the fan 5 can actively discharge the heat inside the cable branch box 100, thereby improving the heat dissipation efficiency, especially in the high temperature environment in summer, it can effectively reduce the temperature inside the cable branch box 100, prevent the overheating of electrical components due to excessive temperature, and reduce the condensation phenomenon inside the cable branch box 100, thereby reducing the rust problem caused by moisture, extending the service life of the equipment, improving the reliability, adaptability and safety of the power supply, reducing maintenance costs, and thus improving the overall performance of the cable branch box 100; the fan 5 can be directly connected to the hole wall of the first installation hole, or connected to the installation box 1, and a bracket can be provided inside the accommodating cavity 11 to connect to the fan 5. This embodiment does not limit the specific connection method of the fan 5 and the installation box 1.

[0036] See also Figure 1 and Figure 2In one embodiment, the cable branch box 100 further includes a vent assembly 6, and a second mounting hole (not shown) communicating with the accommodating cavity 11 is further provided on the mounting box 1. The vent assembly 6 includes a louver 61, a filter 62 and a flange 63 sequentially connected in a direction close to the accommodating cavity 11, and the flange 63 is provided in the second mounting hole; specifically, by providing the louver 61 and the filter 62, rainwater, dust and other debris can be effectively prevented from entering the interior of the cable branch box 100, thereby improving the protection level of the cable branch box 100 and enabling it to adapt to various adverse weather conditions, such as strong winds and heavy rains. The filter The use of 62 can also filter particles and debris in the air, ensuring a clean environment inside the cable branch box 100 and reducing equipment failures caused by pollution. The flange 63 is set in the second mounting hole, making the vent assembly 6 easy to install and maintain, and also convenient for replacing the vent assembly 6 when needed, while also improving the aesthetics of the cable branch box 100. The design of the vent assembly 6 not only improves the protection level and waterproof performance of the cable branch box 100, but also improves the heat dissipation efficiency and service life of the cable branch box 100 through effective filtering and heat dissipation design, while also enhancing energy conservation and environmental protection effects and improving power supply reliability. In addition, in this embodiment, the louvers 61 can be aluminum alloy louvers, and the filter 62 can be a medium-efficiency filter, a primary-efficiency filter, or a high-efficiency filter. This embodiment does not limit the specific selection of louvers 61 and filters 62. The flange 63 can be directly connected to the hole wall of the second mounting hole, or connected to the installation box 1. A bracket can also be set inside the accommodating cavity 11 to connect to the flange 63. This embodiment does not limit the specific connection method of the flange 63 and the installation box 1.

[0037] In this embodiment, the fan 5 and the vent assembly 6 can be relatively arranged on both sides of the installation box 1, thereby forming effective air convection, so that hot air can be discharged from one side of the fan 5, and cooler air can enter from the side of the vent assembly 6, forming a good natural ventilation system, improving heat dissipation efficiency, ensuring that the internal temperature of the cable branch box 100 is effectively controlled, thereby improving the adaptability and safety of the cable branch box 100.

[0038] In one embodiment, the flange 63 includes a main body 631 and a folded edge 632, the folded edge 632 is connected to the periphery of the main body 631, and the folded edge 632 extends in a direction away from the accommodating cavity 11, the inner wall of the folded edge 632 is connected to the filter 62, and the outer wall of the folded edge 632 is connected to the hole wall of the second mounting hole; specifically, by setting the folded edge 632, a better sealing effect can be provided for the cable branch box 100, the protection level of the cable branch box 100 can be improved, and the occurrence of rainwater backflow can be prevented, thereby extending the service life of the cable branch box 100, protecting the dryness and cleanliness of the interior of the cable branch box 100, reducing the electrical safety risks caused by poor sealing, reducing maintenance costs and repair frequency, and improving the safety of the operation of the cable branch box 100.

[0039] See also Figure 3 In one embodiment, the installation box 1 includes a box body 12 and a box door assembly 13, the box door assembly 13 includes an inner door component 131, the inner door component 131 includes an installation door 1311 and a mesh door 1312, the installation door 1311 and the mesh door 1312 are both connected to the box body 12, and the box body 12, the installation door 1311 and the mesh door 1312 are enclosed to form a accommodating chamber 11; the cable branch box 100 also includes a control system 7, the control system 7 includes an operation panel 71 and a control cabinet 72, the operation panel 71 and the control cabinet 72 are both connected to the installation door 1311, the control cabinet 72 is arranged in the accommodating chamber 11, and the operation panel 71 and the vertical knife switch 2 are both electrically connected to the control cabinet 72; specifically, the installation door 1311 can be connected to the box body 12 by self-tapping screws, the installation door 1311 is set on the left side and cannot be opened normally, and the mesh door 1312 is set on the right side and can be opened during maintenance, and the mesh door 1312 is an observation door and an inspection door The door is provided with a mesh door 1312, which allows the operator to observe the internal situation of the box body 12 through the mesh door 1312 without opening the box door assembly 13, and to conduct a quick visual inspection. During maintenance, the mesh door 1312 can be opened to facilitate maintenance of the various components inside the accommodating cavity 11; by integrating the operation panel 71 on the installation door 1311, it is more convenient for the operator to operate, and the operation panel 71 can be directly accessed through the installation door 1311 to perform necessary control and monitoring, thereby improving the convenience of operation. The control cabinet 72 is provided in the accommodating cavity 11, which can more effectively utilize the space, reduce the overall size of the cable branch box 100, and save installation space; the operation panel 71 and the vertical knife switch 2 are both electrically connected to the control cabinet 72, which can realize real-time monitoring of the cable branch box 100, facilitate status monitoring and fault diagnosis, improve maintenance efficiency, and reduce power outage time. In this embodiment, the control box includes a secondary control terminal box, and the operation panel 71 is streamlined, including multiple operation keys such as a grounding on / off button 711, a grounding power indicator light 712, an isolation on / off button 713, a knife switch power indicator light 714, and a temperature control button 715, which facilitates the operator to monitor the operation of the cable branch box 100 in real time.

[0040] In one embodiment, the box body 12 includes an outer shell 121 and an insulation layer 122, which are arranged in sequence from the outside to the inside. The installation door 1311 and the mesh door 1312 are both connected to the outer shell 121. The insulation layer 122, the installation door 1311, and the mesh door 1312 enclose the accommodating chamber 11. Specifically, the outer shell 121, as an outer layer, provides physical protection for the cable branch box 100 and can resist the influence of the external environment, such as rain, dust, and external impact. The insulation layer 122 can effectively isolate the influence of the external environmental temperature on the internal equipment, maintain the stability of the internal temperature of the cable branch box 100, and reduce the risk of equipment aging and failure caused by temperature changes. This allows the cable branch box 100 to overcome various harsh environments, whether it is the large temperature difference of the plateau or the extreme environment, and can ensure the normal operation of the cable branch box 100, thereby enhancing the stability and adaptability of the cable branch box 100. In this embodiment, the outer shell 121 can be made of cold-rolled steel plate or other materials with good mechanical properties. While ensuring strength, it can reduce weight, making it both convenient to operate and aesthetically pleasing. The thermal insulation layer 122 may be made of rock wool board or other materials with good thermal insulation performance. This embodiment does not limit the specific selection of the outer shell layer 121 and the thermal insulation layer 122.

[0041] In one embodiment, the mesh door 1312 is rotatably connected to the box body 12, and the installation box 1 also includes an electromagnetic lock 14, which is connected to the box body 12. The electromagnetic lock 14 is used to limit the rotation of the mesh door 1312 relative to the box body 12; specifically, by setting the electromagnetic lock 14, it can be ensured that the mesh door 1312 can be opened for maintenance or inspection only under authorized circumstances, and unauthorized personnel can be prevented from entering, thereby improving the safety of equipment and personnel, and when maintenance or inspection is required, the electromagnetic lock 14 can be easily opened, so that maintenance personnel can easily enter the accommodating cavity 11 to perform necessary operations, thereby improving maintenance efficiency.

[0042] See also Figure 4In one embodiment, the door assembly 13 further includes an outer door component 132, which includes a first outer door 1321 and a second outer door 1322. The first outer door 1321 and the second outer door 1322 are both rotatably connected to the box body 12. The first outer door 1321 is arranged along the side of the installation door 1311 away from the accommodating chamber 11, and the second outer door 1322 is arranged along the side of the mesh door 1312 away from the accommodating chamber 11. Specifically, by arranging the first outer door 1321 and the second outer door 1322, the installation door 1311 and the mesh door 1312 can be opened. An additional layer of security protection is provided to prevent unauthorized personnel from accessing the internal components of the cable branch box 100, thereby improving the safety of equipment and personnel; and the design of the outer door component 132 also helps to improve the protection of the box 12 against the external environment, such as preventing rain, dust and other debris from entering the interior of the box 12, protecting the internal equipment from damage, and the rotatably connected outer door component 132 is convenient for maintenance personnel to open it for equipment inspection and maintenance work when necessary, and it is also convenient to close the outer door component 132 after maintenance is completed to ensure the safety and sealing of the equipment.

[0043] In this embodiment, the installation box 1 further includes a first door lock and a second door lock. The first door lock is used to restrict the rotation of the first outer door 1321 relative to the box body 12, and the second door lock is used to restrict the rotation of the second outer door 1322 relative to the box body 12. The provision of the first and second door locks ensures the safety and sealing of the cable branch box 100. The first and second door locks can be mechanical locks or electromagnetic locks, and the specific structures of the first and second door locks are not limited in this embodiment.

[0044] In this embodiment, the installation door, the mesh door, the first outer door and the second outer door can all be made of cold-rolled steel plates, which can reduce weight while ensuring strength, and are both convenient to operate and aesthetically pleasing.

[0045] In one embodiment, the outer wall of the installation box 1 is provided with a paint layer (not shown in the figure), and the paint layer includes an epoxy zinc-rich layer (not shown in the figure), an epoxy micaceous iron layer (not shown in the figure) and a polyurethane layer (not shown in the figure) arranged in sequence from the inside to the outside; specifically, after the installation box 1 is polished, a paint layer can be provided on the outer wall of the installation box 1, thereby providing the installation box 1 with excellent corrosion resistance, wear resistance and anti-penetration shielding performance, reducing the risk of equipment failure due to corrosion, thereby effectively extending the service life of the installation box 1, improving the safety of the equipment, reducing maintenance costs, and being suitable for protecting the cable branch box 100 under various harsh environmental conditions; and in this embodiment, in order to be suitable for protecting the cable branch box 100 under various harsh environmental conditions, the number of the epoxy zinc-rich layer, the epoxy micaceous iron layer and the polyurethane layer are all two, and the two epoxy zinc-rich layers, the two epoxy micaceous iron layers and the two polyurethane layers are arranged in sequence from the inside to the outside on the outer wall of the installation box 1.

[0046] In this embodiment, the cable branch box 100 also includes a lightning rod 8, which can be connected to the second busbar 4. By setting up the lightning rod 8, lightning can be effectively attracted and conducted into the underground, thereby preventing lightning from damaging the cable branch box 100 and the connected power equipment, improving the safety of the equipment and operators, reducing maintenance costs, improving the reliability of power supply, and complying with regulatory requirements, thereby extending the service life of the equipment.

[0047] The above description is merely an exemplary embodiment of the present invention and does not limit the patent scope of the present invention. All equivalent structural transformations made using the contents of the present invention specification and drawings under the technical concept of the present invention, or direct / indirect application in other related technical fields are included in the patent protection scope of the present invention.

Claims

1. A cable branch box, characterized in that: The cable branch box includes an installation box, a vertical knife switch, a first busbar and a second busbar. A accommodating cavity is provided in the installation box. The first busbar and the second busbar are both provided in the accommodating cavity. A first contact end is provided on the first busbar, and a second contact end is provided on the second busbar. The first contact end and the second contact end are spaced apart along the height direction of the installation box. The vertical knife switch is hinged to the first contact end. A contact point is provided on the vertical knife switch, and the contact point is used to abut against the second contact end.

2. The cable branch box according to claim 1, characterized in that: The second contact end is located below the first contact end.

3. The cable branch box according to claim 1, characterized in that: The cable branch box further includes a fan. The mounting box is further provided with a first mounting hole communicating with the accommodating cavity, and the fan is arranged in the first mounting hole.

4. The cable branch box according to claim 3, characterized in that: The cable branch box also includes a vent assembly, and the mounting box is also provided with a second mounting hole connected to the accommodating cavity. The vent assembly includes a louver, a filter and a flange connected in sequence along the direction close to the accommodating cavity, and the flange is arranged in the second mounting hole.

5. The cable branch box according to claim 4, characterized in that: The flange includes a body and a folded edge, the folded edge is connected to the periphery of the body and extends away from the accommodating cavity, the inner wall of the folded edge is connected to the filter, and the outer wall of the folded edge is connected to the hole wall of the second mounting hole.

6. The cable branch box according to any one of claims 1 to 5, characterized in that: The installation box includes a box body and a box door assembly, the box door assembly includes an inner door component, the inner door component includes an installation door and a mesh door, the installation door and the mesh door are both connected to the box body, and the box body, the installation door and the mesh door enclose the accommodating cavity; the cable branch box also includes a control system, the control system includes an operation panel and a control cabinet, the operation panel and the control cabinet are both connected to the installation door, the control cabinet is arranged in the accommodating cavity, and the operation panel and the vertical knife switch are both electrically connected to the control cabinet.

7. The cable branch box according to claim 6, characterized in that: The box body includes an outer shell layer and an insulation layer arranged in sequence from the outside to the inside, the installation door and the mesh door are both connected to the outer shell layer, and the insulation layer, the installation door and the mesh door enclose to form the accommodating cavity.

8. The cable branch box according to claim 6, characterized in that: The mesh door is rotatably connected to the box body. The installation box further comprises an electromagnetic lock connected to the box body. The electromagnetic lock is used to limit the rotation of the mesh door relative to the box body.

9. The cable branch box according to claim 6, characterized in that: The box door assembly also includes an outer door component, which includes a first outer door and a second outer door. The first outer door and the second outer door are both rotatably connected to the box body. The first outer door is arranged along the side of the installation door away from the accommodating cavity, and the second outer door is arranged along the side of the mesh door away from the accommodating cavity.

10. The cable branch box according to claim 6, characterized in that: The outer wall of the installation box is provided with a spray paint layer, and the spray paint layer includes an epoxy zinc-rich layer, an epoxy micaceous iron layer and a polyurethane layer which are sequentially arranged from the inside to the outside.

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