Mining power supply and distribution device

Abstract

The utility model discloses a mining power supply and distribution device, which comprises a main control element, a plurality of groups of transformers, a control element and a box body, and is characterized in that the main control element is electrically connected with an input power supply and is used for controlling and cutting off a fault circuit; the plurality of groups of transformers are electrically connected with the main control element and are used for converting the voltage of the input power supply into the voltage required by each electric device; the control element is electrically connected with the plurality of groups of transformers and is used for controlling electric energy output under the current voltage; the box body is provided with ports, the main control element and the control element are connected with the electric equipment through the ports, and the plurality of groups of transformers are arranged in the box body. The power supply and distribution device is compact in internal structure and flexible and light in installation and transportation, replaces an original combination switch, a mobile transformer substation and the like, can be directly connected with a power supply cable, can supply power to surrounding electric equipment, and achieves the purposes of small size and convenient maintenance and replacement of the power supply and distribution device in a limited space under a mine.

Description

Technical Field

[0001] The present disclosure generally relates to the field of power supply and distribution technology for mines. More specifically, the present disclosure relates to a power supply and distribution device for mines. Background Art

[0002] The main driving mode of belt conveyor is "mobile substation + inverter + asynchronous motor + reducer", which has the advantages of small impact on mechanical and electrical systems during startup and automatic speed regulation. However, it still has problems such as large size, low power factor, large electromagnetic interference, large mechanical wear, and difficult maintenance. In addition, there are many devices to be installed, long construction time and long debugging time. The failure rate of multiple equipment systems will be high, and the safety and reliability of the system will be reduced.

[0003] When supplying power underground, the existing technology has many power supply cables and installation equipment, and the coal mine belt conveyor also has problems such as high incoming voltage level, low system efficiency, small installation space, frequent moving and overturning of the chute belt conveyor, and complex electromagnetic environment with large interference.

[0004] In view of this, it is urgent to provide a power supply and distribution device solution to solve the above problems of multiple installation devices, small installation space and low system efficiency. Due to the small size and limited space of the power supply and distribution device, it is necessary to consider modularization, convertibility, explosion-proof, heat dissipation and other issues. Utility Model Content

[0005] In order to at least solve one or more of the technical problems mentioned above, the present disclosure proposes a solution for a mine power supply and distribution device.

[0006] The present disclosure provides a power supply and distribution device for mining, comprising a main control element, multiple sets of transformers, a control element and a box body, wherein the main control element is electrically connected to an input power supply and is used to control and cut off a faulty circuit; the multiple sets of transformers are electrically connected to the main control element and are used to convert the voltage of the input power supply into a voltage required by each electrical device; the control element is electrically connected to the multiple sets of transformers and is used to control the output of electric energy under a current voltage; a port is provided on the box body, and the main control element and the control element are connected to the electrical devices through the port, and the multiple sets of transformers are arranged in the box body.

[0007] In some embodiments, the ports are arranged on the side walls of the box, including an input port, a direct output port, an indirect output port and an output port. The input port is used to connect to an input power supply; the direct output port is electrically connected to the input port, and is used to connect to a first external all-in-one machine; the indirect output port is electrically connected to the direct output port, and is electrically connected to the direct output port through a main control unit, and is used to connect to a second external all-in-one machine; the output port is used to connect to various power supply and distribution equipment.

[0008] In some embodiments, the box body includes a box door and a partition. The box door is arranged on one side of the box body and is movably connected to the box body. The partition is fixed in the box body perpendicular to the box door, isolating the box body into a main control area, a transformer area and a control area. The partition is provided with a wire threading hole, and the main control area, the transformer area and the control area are connected through the wire threading hole.

[0009] In some embodiments, the main control element is arranged in the main control area, including an isolating switch and a vacuum contactor, the isolating switch is connected in series with the vacuum contactor, the isolating switch is connected to the input port, and the vacuum contactor is electrically connected to multiple sets of transformers and indirect output ports.

[0010] In some embodiments, multiple groups of transformers are fixed on the partition of the transformation area, and the transformation area is provided with a heat dissipation device and an insulating plate. The heat dissipation plate is arranged around the multiple groups of transformers, and the insulating plate is arranged at the edge of the transformation area to form a current isolation space.

[0011] In some embodiments, the control element is disposed in the control area, and the control element includes a circuit breaker and a contactor. The circuit breaker and the contactor are connected in series and integrated on the inner side wall of the box body.

[0012] In some embodiments, the isolating switch includes a switch body and an operating device. The switch body is disposed in a box body, and the operating device is disposed on an outer side wall of the box body to open or close the switch body.

[0013] In some embodiments, the mining power supply and distribution device further includes a protection device, which is disposed on the inner side wall of the box body and is connected in series with the control element to protect external electrical equipment.

[0014] In some embodiments, an assembly structure adapted to the external integrated machine is disposed on the box body, and the assembly structure connects the box body to the second external integrated machine in a detachable manner.

[0015] Through the mining power supply and distribution device provided above, the disclosed embodiment integrates multiple sets of transformers, main control components and control components in the box, and each component adopts modular design and management. The power supply and distribution device can not only provide electric energy for the belt conveyor, but also provide power distribution for the lower-level electrical equipment in the belt conveyor system, simplifying the on-site power supply and distribution system. Further, in some embodiments, by setting ports on the box, it is easier for operators to operate the power supply and distribution device. Even inexperienced operators can make full use of the power supply and distribution device, shortening the time for training operators to use the power supply and distribution device. Further, in some embodiments, by setting partitions in the box, the box is divided into multiple areas, and corresponding components are set in each area, so that each component is modularized, which can be more convenient for maintenance and replacement of components. Further, in some embodiments, isolating switches and vacuum contactors are set in the main control area to double protect the safety of operators. Furthermore, in some embodiments, the transformer area is provided with a heat sink and an insulating plate. Since the transformer is a high-power component, a large amount of heat will be generated during operation. The heat sink can protect the circuit, and the insulating plate can isolate the current outflow of the transformer to protect the safety of the operator. Furthermore, in some embodiments, the box body is provided with an assembly structure compatible with the second external integrated machine, so that the power supply and distribution device can be quickly installed or replaced. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] By reading the detailed description below with reference to the accompanying drawings, the above and other objects, features and advantages of the exemplary embodiments of the present disclosure will become readily understood. In the accompanying drawings, several embodiments of the present disclosure are shown in an exemplary and non-limiting manner, and the same or corresponding reference numerals represent the same or corresponding parts, wherein:

[0017] Figure 1 A structural block diagram of a power supply and distribution device according to an embodiment of the present disclosure is shown;

[0018] Figure 2 A schematic diagram of the internal structure of the power supply and distribution device according to the embodiment of the present disclosure is shown;

[0019] Figure 3 The application scenario of the power supply and distribution device of the disclosed embodiment is shown;

[0020] Figure 4 The overall structural diagram of the power supply and distribution device according to the embodiment of the present disclosure is shown;

[0021] Figure 5 A schematic diagram showing the arrangement of ports of a power supply and distribution device according to an embodiment of the present disclosure is shown;

[0022] Figure 6 Another internal structural block diagram of the power supply and distribution device according to the embodiment of the present disclosure is shown;

[0023] Figure 7 A schematic diagram of a belt conveyor system according to an embodiment of the present disclosure is shown;

[0024] Figure 8 Another internal structure schematic diagram of the power supply and distribution device according to the embodiment of the present disclosure is shown;

[0025] Fig. 9 The overall internal structure block diagram of the power supply and distribution device according to the embodiment of the present disclosure is shown;

[0026] Fig.10 A schematic diagram of a control unit of a power supply and distribution device AA according to an embodiment of the present disclosure is shown.

[0027] Reference numerals:

[0028] 1. Main control element; 11. Disconnector; 111. Switch body; 112. Operating device; 12. Vacuum contactor;

[0029] 2. Multiple transformers; 21. 12kV / 1.36kV transformer; 22. 12kV / 265V transformer; 23. 1.36kV / 152V transformer;

[0030] 3. Control element; 31. Circuit breaker; 32. Contactor;

[0031] 4. Box body; 41. Port; 411. Input port; 412. Direct output port; 413. Indirect output port; 414. Output port; 4141. 1140V output port; 4142. 127V output port; 42. Box door; 43. Partition; 44. Main control area; 45. Transformation area; 451. Heat dissipation device; 452. Insulation board; 453. First transformation area; 454. Second transformation area; 46. Control area; 47. Assembly structure;

[0032] 5. Power supply and distribution device; 51. Protection device; 511. Motor protector; 512. Lighting system protector;

[0033] 6. External integrated machine; 61. First external integrated machine; 62. Second external integrated machine; 63. Third external integrated machine. DETAILED DESCRIPTION

[0034] The following will be combined with the drawings in the embodiments of the present disclosure to clearly and completely describe the technical solutions in the embodiments of the present disclosure. Obviously, the described embodiments are part of the embodiments of the present disclosure, not all of the embodiments. Based on the embodiments in the present disclosure, all other embodiments obtained by those skilled in the art without creative work are within the scope of protection of the present disclosure.

[0035] It should be understood that the terms "include" and "comprising" used in the specification and claims of the present disclosure indicate the presence of described features, integers, steps, operations, elements and / or components, but do not exclude the presence or addition of one or more other features, integers, steps, operations, elements, components and / or collections thereof.

[0036] It should also be understood that the terms used in this disclosure are only for the purpose of describing specific embodiments and are not intended to limit the disclosure. As used in this disclosure and claims, the singular forms of "a", "an", and "the" are intended to include the plural forms unless the context clearly indicates otherwise. It should also be further understood that the term "and / or" used in this disclosure and claims refers to any combination of one or more of the associated listed items and all possible combinations, including these combinations.

[0037] As used in this specification and claims, the term "if" may be interpreted as "when" or "upon" or "in response to determining" or "in response to detecting," depending on the context. Similarly, the phrase "if it is determined" or "if [described condition or event] is detected" may be interpreted as meaning "upon determination" or "in response to determining" or "upon detection of [described condition or event]" or "in response to detecting [described condition or event]," depending on the context.

[0038] The specific implementation of the present disclosure is described in detail below with reference to the accompanying drawings.

[0039] The present disclosure provides a mine power supply and distribution device, such as Figures 1 to 3 As shown, it includes a main control element 1, multiple sets of transformers 2, a control element 3 and a box 4. The main control element 1 is electrically connected to the input power supply for controlling and cutting off the fault circuit; the multiple sets of transformers 2 are electrically connected to the main control element 1 for converting the voltage of the input power supply into the voltage required by each electrical device; the control element 1 is electrically connected to the multiple sets of transformers 2 for controlling the electric energy output under the current voltage; a port 41 is provided on the box 4, and the main control element 1 and the control element 3 are connected to the electrical devices through the port 41, and the multiple sets of transformers 2 are arranged in the box.

[0040] Specifically, when the power supply and distribution device 5 is used, it is installed on the external integrated machine 6 to supply power to the external integrated machine 6. The power supply and distribution device 5 replaces the original combination switch, mobile substation, lighting comprehensive protection and inverter, and can be directly connected to the 10kV power supply to supply power to the lower-level electrical equipment. The main control element 1 is the first component that the input power passes through when entering the power supply and distribution device 5. The main control element 1 is set in the box 4 to control the disconnection or closing of the input power to protect the circuit as a whole. When the operator needs to inspect the power supply and distribution device 5 or does not need to use it, the input power can be disconnected through the main control element 1, or if a short circuit occurs during the power-on process, the main control element 1 will disconnect the circuit to protect the electrical equipment and the power supply and distribution device 5. The multiple sets of transformers 2 are electrically connected to the control element 1. The current of the input power supply enters the multiple sets of transformers 2 through the main control element 1. The multiple sets of transformers 2 convert the voltage of the input power supply into the voltage required by each power supply device. For example, the multiple sets of transformers 2 may include a 12kV / 1.36kV transformer 21 for 10kV to 1140V, a 12kV / 265V transformer 22 for 10kV to 220V, and a 1.36kV / 152V transformer 23 for 1140V to 127V. The 12kV / 1.36kV transformer 21 provides power for the water cooling system, the belt winding machine, the tensioning machine, and the iron removal machine in the belt conveyor system; the 12kV / 265V transformer 22 provides power for the power supply and distribution device 5; and the 1.36kV / 152V transformer 23 provides power for the lighting system, etc. Of course, other transformers can also be set, which is not limited here. Therefore, the multiple transformers 2 provided in the power supply and distribution device 5 provide power to the lower-level electrical equipment, providing great convenience for the power supply of the lower-level equipment in the belt conveyor system. The control unit 3 is a switch that controls the lower-level electrical equipment and the multiple transformers 2. Each power supply circuit is controlled by the control unit 3. The circuits do not interfere with each other. When a circuit fails, it is manually or automatically disconnected, which will not affect the normal operation of other circuits. This is the design idea, which improves the utilization rate of the power supply and distribution device 5 and improves the work efficiency. The box 4 adopts a rectangular parallelepiped or a cube, preferably a rectangular parallelepiped, and the material is preferably an insulating material. The box 4 can be disassembled or installed on the motor in a different side according to different application scenarios for easy on-site use. A plurality of ports 41 are provided on the box 4 for connecting to the outside, which is convenient for operators to use. The multiple transformers 2, the main control unit 1 and the control unit 3 are modularly and compactly arranged in the box 4, so that the volume of the box 4 is small to meet the installation space restrictions and use requirements on site.

[0041] like Figures 4 to 6As shown, preferably, the port 41 is arranged on the side wall of the box body 4, including an input port 411, a direct output port 412, an indirect output port 413 and an output port 414, the input port 411 is used to connect to the input power supply; the direct output port 412 is electrically connected to the input port 411, and is used to connect to the second external integrated machine 62; the indirect output port 413 is electrically connected to the direct output port 412, and is electrically connected to the direct output port 412 through the main control unit 1, and is used to connect to the first external integrated machine 61; the output port 414 is used to connect to each lower-level power supply and distribution equipment.

[0042] Specifically, the input port 411, the direct output port 412 and the output port 414 are arranged on the rear side of the box body 4, wherein the front and rear are based on the axial direction of the external integrated machine, so as not to affect the assembly of the box body 4 on the external integrated machine 6. In order to minimize the box body 4, the box body 4 is in an inverted L shape, and the input port 411, the direct output port 412 and the output port 414 are arranged in the missing space of the inverted L shape to reduce the occupation of the surrounding space. The input port 411 is used to plug the cable of the input power supply, and the input port 411 and the direct output port 412 are directly connected, that is, the voltage of the input power supply from the direct output port 412 does not change. For example, if the input power supply is 10KV, then the input port 411 is 10KV, and the direct output port 412 is still 10KV. The direct output port 412 can be connected to the input port 411 of the next power supply and distribution device 5 or to the second external integrated machine 62. There is no restriction on the voltage of the power supply here. The output ports 414 are neatly arranged at the upper ends of the input ports 411 and the direct output ports 412. The input ports 411 are connected to multiple groups of transformers 2 and are the power output interfaces. There are multiple output ports 411, and three 1140V output ports 4141 and two 127V output ports 4142 can be set. The type and number of the output ports 411 match the number of power supplies to be output by the transformer, and there is no restriction here. The indirect output port 413 is set on the side wall of the box body 4 close to the external integrated machine 6. The indirect output port 413 is connected to the first external integrated machine 61 to provide power for the first external integrated machine 61. That is to say, when multiple external integrated machines 6 need to be operated in series, only one cable needs to be drawn from the input power supply to connect to the input port 411 of the power supply and distribution device 5 of one of the external integrated machines 6. The remaining external integrated machines 6 can be connected in sequence through the direct output port 412, and the indirect output port 413 of the power supply and distribution device 5 provides power to the external integrated machine 6 to which it is installed. For example, the belt conveyor system is usually configured as three belt external integrated machines 6, such as Figure 7As shown, two of them are equipped with power supply and distribution devices 5 to meet the power needs of equipment near the well. At the same time, the power supply and distribution device 5 in the external integrated machine 6 also provides 3 1140V output ports 4141 and 2 127V output ports 4142, which can provide power input for lower-level electrical equipment. The third external integrated machine 63 is connected to the direct output port 412 of the power supply and distribution device 5 of the previous external integrated machine 6. This greatly reduces the installation cost of the power supply cable of the external integrated machine 6, reduces the construction difficulty, and saves construction time.

[0043] Preferably, if Figure 3 and Figure 8 As shown, the box body 4 includes a box door 42 and a partition 43. The box door 42 is arranged on one side of the box body 4 and is movably connected to the box body 4. The partition 43 is fixed in the box body 4 perpendicular to the box door 4, and separates the box body 4 into a main control area 44, a transformer area 45 and a control area 46. The partition 43 is provided with a threading hole, and the main control area 44, the transformer area 45 and the control area 46 are connected through the threading hole.

[0044] Specifically, the box door 42 is arranged on the side of the box body 4 away from the external integrated machine 6, so that the operator can check the working status of each component in the box body by opening the box door 42. The shape of the box door 42 is adapted to the box body 4. The box door 42 and the box body 4 can be snapped together or hinged together. Since the working environment of the power supply and distribution device 5 is underground, the box door 42 can reduce the dust in the box body 4 and ensure the normal operation of each component in the box body 4. The partition 43 is perpendicular to the side wall of the box body 4 close to the external integrated machine 6, and divides the box body 4 into multiple areas. The transformer area 45 is arranged in the middle position, and the main control area 44 and the control area 46 are arranged on both sides to better control the transformer area 45 without confusion. The partition 43 is provided with threading holes to allow the lines to pass through. Such a compact layout can make the box body 4 smaller and more convenient to assemble.

[0045] like Figure 8 and Fig. 9 As shown, preferably, the main control element 1 is arranged in the main control area 44, including an isolating switch 11 and a vacuum contactor 12, the isolating switch 11 and the vacuum contactor 12 are connected in series, the isolating switch 11 is connected to the input port 411, and the vacuum contactor 12 is electrically connected to multiple groups of transformers 2 and the indirect output port 413.

[0046] Specifically, the isolating switch 11 includes a switch body 111 disposed in the box 4 and an operating device 112 outside the box 4. Figure 3As shown, the operator can disconnect the circuit without opening the box. The input power enters from the input port 411, one way is directly output from the direct output port 412, and one way passes through the isolating switch 11 and the vacuum contactor 12, enters multiple sets of transformers 2 or connects to the indirect output port 413. This double isolation protection design concept is adopted to ensure the safety of equipment and maintenance personnel. For example, when the external integrated machines 6 are connected in series with each other, when each external integrated machine 6 draws power from the previous external integrated machine 6, each cable is in the front stage of the isolating switch 11 and the vacuum contactor 12. A fault in any external integrated machine 6 line of the entire system will not affect the normal operation of other external integrated machines 6.

[0047] Preferably, if Figure 8 As shown, multiple groups of transformers 2 are fixed on the partition 43 of the transformer area 45. The transformer area 45 is provided with a heat dissipation device 451 and an insulating plate 452. The heat dissipation plate 451 is arranged around the transformer, and the insulating plate 452 is arranged at the edge of the transformer area 45 to form a current isolation space.

[0048] Specifically, the transformer area 45 is a high power area, so a lot of heat will be generated. Excessive heat will affect the operation of the transformer. Therefore, a heat sink is set in the transformer area, including a first transformer area 453 and a second transformer area 454, wherein the 12kV / 1.36kV transformer 21 is placed in the first transformer area 453, and the 12kV / 265V transformer 22 and the 1.36kV / 152V transformer 23 are placed in the second transformer area 454. The second transformer area 454 may have a heat sink 451 or not, and there is no restriction here. A heat sink 451 is set around the 12kV / 1.36kV transformer 21 of the first transformer area 453, and the heat sink 451 adopts water cooling for heat dissipation. An insulating plate 452 is set in the transformer area 45, partially replacing the partition 43, separating the transformer from the surrounding components, preventing the leakage of current, and ensuring the safety of the operator.

[0049] Preferably, if Figure 3 as well as Figures 9 and 10 As shown, the control element 3 is arranged in the control area 46 , and the control element 3 includes a circuit breaker 31 and a contactor 32 . The circuit breaker 31 and the contactor 32 are connected in series and integrated on the inner side wall of the box body 4 .

[0050] Specifically, the circuit breaker 31 and the contactor 32 are switches, the circuit breaker 31 is a switch controlled by an operator, and the contactor 32 is a switch that automatically disconnects when a short circuit occurs. The circuit breaker 31 and the contactor 32 are connected in series, and multiple groups of transformers 2 are connected to the input port 411 through the circuit breaker 31 and the contactor 32 to control different output power supplies. If a part of the circuit of the lower-level electrical equipment fails, the circuit with the fault can be cut off, which will not affect the normal operation of the lower-level electrical equipment. The contactor 32 is arranged on the inner side wall of the box body 4, and the control body 311 of the circuit breaker 31 is arranged on the inner side wall of the box body 4, but the operation button 312 is arranged on the outer side wall of the box body. The side wall mentioned here is preferably away from the side wall of the output port 414, which is convenient for operation. For example, the operation button 312 includes 3-way 1140V operation button 3121 to control the power output of 3-way 1140V output port 4141; 2-way 127V operation button 3122 to control the power output of 2-way 127V output port 4142; and 2 10KV operation buttons 3123 to control the power output of the direct output port 412 and the indirect output port 413. Of course, the number of the operation buttons 312 is set according to the number of output ports, and there is no restriction here. Among them, the operation buttons 312 of the circuit breaker 31 are all explosion-proof structures, which meet the Class I explosion-proof requirements of coal mines.

[0051] Preferably, if Fig. 9 and Fig.10 As shown, the mine power supply and distribution device 5 also includes a protection device 51, which is arranged on the inner side wall of the box body 4 and is connected in series with the control element 3 to protect external electrical equipment.

[0052] Specifically, the protection device 51 is arranged together with the contactor 32 on the inner side wall of the box body 4, including a motor protector 511 and a lighting system protector 512. The motor protector 511 is connected to the circuit breaker 31 to protect the water cooling system, the belt winding machine, the tensioning machine and the iron removal machine in the belt conveyor system; the lighting system is connected to the contactor 32 protector to protect the lighting system.

[0053] Preferably, if Figure 4 As shown, the box body 4 is provided with an assembly structure 47 adapted to the external integrated machine 6, and the assembly structure 47 connects the box body 4 and the second external integrated machine 61 in a detachable manner.

[0054] Specifically, an assembly structure 47 is provided on the outer side wall of the box body 4 close to the external integrated machine 6, and the power supply and distribution device 5 can be assembled to the external integrated machine 6, and the assembly method is plug-in or other assembly methods, so that the power supply and distribution device 5 can be assembled quickly. When the power supply and distribution device 5 is not needed, the external integrated machine 6 can be directly connected to any spare incoming line interface on the inverter cavity to obtain power, and it can also be used normally.

[0055] Although multiple embodiments of the present disclosure have been shown and described herein, it will be apparent to those skilled in the art that such embodiments are provided by way of example only. Those skilled in the art may think of many changes, modifications, and alternatives without departing from the thought and spirit of the present disclosure. It should be understood that in the process of practicing the present disclosure, various alternatives to the embodiments of the present disclosure described herein may be adopted. The attached claims are intended to define the scope of protection of the present disclosure, and therefore cover equivalents or alternatives within the scope of these claims.

Claims

1. A power supply and distribution device for mining, characterized in that: include: A main control element, which is electrically connected to the input power supply and is used to control and cut off the fault circuit; A plurality of transformers, which are electrically connected to the main control element and are used to convert the voltage of the input power supply into the voltage required by each electrical device; A control element, which is electrically connected to the plurality of transformers and is used to control the output of electric energy at the current voltage; A box body is provided with a port, the main control element and the control element are connected to the electrical equipment through the port, and the multiple sets of transformers are arranged in the box body.

2. The mine power supply and distribution device according to claim 1, characterized in that: The port is arranged on the side wall of the box body, and includes: An input port, which is used to connect to an input power source; A direct output port, electrically connected to the input port, for connecting to a first external all-in-one machine; an indirect output port, which is electrically connected to the direct output port and is electrically connected to the direct output port through the main control element, and is used to connect to a second external all-in-one machine; The output port is used to connect each of the electrical devices.

3. The mine power supply and distribution device according to claim 2, characterized in that: The box body comprises: A box door, which is arranged on one side of the box body and is movably connected to the box body; A partition is fixed in the box body perpendicular to the box door, and separates the box body into a main control area, a transformer area and a control area. The partition is provided with a threading hole, and the main control area, the transformer area and the control area are connected through the threading hole.

4. The mine power supply and distribution device according to claim 3, characterized in that: The main control element is arranged in the main control area, and includes an isolating switch and a vacuum contactor. The isolating switch is connected in series with the vacuum contactor. The isolating switch is connected to the input port, and the vacuum contactor is electrically connected to the multiple transformers and the indirect output port.

5. The mine power supply and distribution device according to claim 3, characterized in that: The multiple groups of transformers are fixed on the partition of the transformer area. The transformer area is provided with a heat sink and an insulating plate. The heat sink is arranged around the transformer, and the insulating plate is arranged at the edge of the transformer area to form a current isolation space.

6. The mine power supply and distribution device according to claim 3, characterized in that: The control element is arranged in the control area, and the control element comprises a circuit breaker and a contactor. The circuit breaker and the contactor are connected in series and integrated on the inner side wall of the box body.

7. The mine power supply and distribution device according to claim 4, characterized in that: The isolating switch comprises a switch body and an operating device. The switch body is arranged in the box body, and the operating device is arranged on the outer side wall of the box body to open or close the switch body.

8. The mine power supply and distribution device according to claim 1, characterized in that: The mine power supply and distribution device also includes a protection device, which is arranged on the inner side wall of the box body and is connected in series with the control element to protect external electrical equipment.

9. The mine power supply and distribution device according to claim 2, characterized in that: The box body is provided with an assembly structure adapted to the external integrated machine, and the assembly structure connects the box body and the external integrated machine in a detachable manner.

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