Box-type combined transformer for power distribution network

Abstract

The invention discloses a box-type combined transformer for a power distribution network, and relates to the technical field of combined transformers, in particular to the box-type combined transformer for the power distribution network, which comprises a bottom plate, a supporting plate, a cabinet body, a flashing board, a power distribution assembly body, a cooling system mechanism and a wire inlet mechanism, the cooling system mechanism comprises a cooling device and an air exchange device, the cooling device comprises cooling pipes and a connecting trough plate, the air exchange device comprises an air exchange panel, an air inlet channel, an air exchange pump and a connecting pipeline, the multiple cooling pipes are evenly fixed to the connecting trough plate and penetrate through the cabinet body to be discharged, and an air suction structure of the cooling pipes extracts high-temperature air in the cabinet body; the cooling pipe is connected with the inner side surface of the cabinet body and surrounds the power distribution assembly body on the cabinet bottom plate in a C-like shape; the sealing plate divides the space below the independent cabinet into an exhaust channel and an air inlet channel, exhaust holes are formed in the two ends, close to the supporting plate, of the ventilation panel, and the two ends of a ventilation pump in the exhaust channel are connected with a cooling pipe and an exhaust pipe respectively. The wire inlet mechanism comprises a wire inlet hole, a conical cylinder, an elastic plate and a clamping cylinder.

Description

Technical Field

[0001] The invention relates to the technical field of combined transformers, and in particular to a box-type combined transformer for a distribution network. Background Art

[0002] The box-type combined transformer is an integrated power distribution equipment, which combines transformer, high-voltage switchgear, low-voltage switchgear, etc. in a box-type housing. It is suitable for distribution network, can realize the conversion of high-voltage electricity into low-voltage electricity, and distribute, control and protect the electric energy. It has the characteristics of strong completeness, small footprint, small investment, convenient installation and maintenance, beautiful appearance, strong weather resistance, etc. The high-voltage incoming line can be overhead or cable, and the low-voltage outgoing line can be cable or bus duct. It is widely used in residential areas, commercial centers, factories and mines and other places; When the distribution components inside the distribution cabinet are working, they often generate a lot of heat. Overheating can cause short circuits or even fires. Therefore, the inside of the transformer needs to be cooled. There are usually many cables inside the transformer. Cable entanglement can easily cause short circuits and is inconvenient to maintain. Therefore, we propose a box-type combined transformer for distribution networks. Summary of the invention

[0003] The purpose of the present invention is to solve the defects that a large amount of heat is generated when the distribution component body inside the distribution cabinet is working, causing short circuit or even fire, and many cables are entangled inside the transformer, causing short circuit and inconvenient maintenance.

[0004] In order to achieve the above invention objectives, the present invention adopts the following technical solutions: The present invention provides a box-type combined transformer for a power distribution network, which comprises a bottom plate, a support plate, a cabinet, a rain shield, a power distribution component body, a cooling system mechanism and a line inlet mechanism; The power distribution assembly body includes a high voltage cabinet, a transformer and a low voltage cabinet; The inner space of the cabinet is divided into three independent cabinets by two built-in partitions, namely, a high-voltage room, a transformer room and a low-voltage room, corresponding to which the power distribution component bodies are placed. The middle cabinet is used to place the transformer body, and the two sides are used to place the high-voltage cabinet and the low-voltage cabinet respectively; the independent cabinets are installed with cabinet doors, and the cabinet doors are locked; The cooling system mechanism includes a cooling device and a ventilation device; the cooling device includes a cooling pipe and a connecting slot plate, and the ventilation device mainly includes a ventilation panel, an air intake channel, an exhaust channel, a ventilation pump and a connecting pipe; The cooling device connection slot plate has a waterproof structure and is fixedly connected to the lower inner side of the cabinet, and is arranged in a C-shape around the power distribution assembly, with the opening facing the cabinet opening; The wire feeding mechanism comprises a wire feeding hole, a cone cylinder, a spring plate and a clamping cylinder; The upper surface of the bottom plate is fixedly connected with a support plate, the support plate is surrounded in a C shape below the independent cabinet, a bottom plate is arranged at the bottom of the cabinet, the cabinet is fixedly connected with the support plate away from the upper edge of the bottom plate, and the rain shield is arranged on the top of the cabinet and fixedly connected to the cabinet; The power distribution assembly body is placed on the bottom plate of the cabinet and is surrounded by a C-shaped cooling device, which can have a certain limiting effect on the power distribution assembly body, so that the cooling device is close to the power distribution assembly body, thereby better improving the cooling effect; The cooling pipe is fixed on the connecting groove plate, and a number of cooling pipes are evenly distributed along the connecting groove plate, and penetrate the cabinet on the side close to the supporting plate. The cooling pipe has an air suction structure for extracting high-temperature air from the cabinet, and the outer side of the cooling pipe is fixedly connected to the inner side of the cabinet; The ventilation panel of the ventilation device is located below the cabinet door, connected to the C-shaped support plate, and forms a closed space with the upper cabinet bottom plate and the bottom plate. The closed space under each independent cabinet is divided into an internal space by a C-shaped closing plate to form an exhaust channel closed by the support plate, the C-shaped closing plate, the cabinet bottom plate and the bottom plate, and an intermediate air intake channel closed by the C-shaped closing plate, the cabinet bottom plate and the bottom plate; exhaust holes are provided on the exhaust channel closing panel on both sides of the air intake hole of the ventilation panel; the ventilation pump is installed in the exhaust channel and fixed on the closing panel, one end of which is connected to the cooling pipe and the other end is connected to the exhaust pipe; The line-in mechanism has a tensioning structure for tensioning the cables on the incoming and outgoing sides, and the line-in mechanism is fixedly connected to the upper part of the inner side surface of the cabinet; Furthermore, the cooling tube is made of metal copper in a tubular shape and is used to absorb the heat generated by the operation of the power distribution component body inside the cabinet.

[0005] Furthermore, a narrow groove is provided on the surface of the cooling pipe, and the opening of the narrow groove is directed toward the distribution component body. The cooling device drives the gas flow inside the cooling pipe, and the air inside the cabinet is sucked into the narrow groove and finally discharged from the cooling device. When the gas is discharged, the heat generated by the operation of the distribution component body is also discharged along with the gas, thereby effectively reducing the temperature inside the cabinet and achieving a better cooling effect.

[0006] Furthermore, there are three connecting trough plates, which are respectively arranged inside the high-voltage chamber, the transformer chamber and the low-voltage chamber, and a plurality of cooling pipes are distributed on one side of the three connecting trough plates close to the support plate. The three groups of cooling pipes are respectively used for cooling the inside of the high-voltage chamber, the transformer chamber and the low-voltage chamber.

[0007] Furthermore, the cabinet bottom plate is provided with a plurality of circular holes which are evenly distributed within the C-shaped range surrounded by the cooling device. As the air inside the cabinet is discharged, the air pressure inside the cabinet decreases, and the outside air enters the bottom of the cabinet through the cooling device and finally enters the cabinet through the circular holes, thereby balancing the air pressure inside the cabinet and avoiding the generation of negative pressure inside the cabinet to prevent the negative pressure from affecting the operation of the power distribution component body. At the same time, the entry of cold air can further cool the interior of the cabinet.

[0008] Furthermore, the exhaust channel, the air intake channel (551) and the internal space of the independent cabinet are connected through the inner cavity of the cooling pipe to form a circulation channel. When the pump is started, the air passes through the narrow slot, the cooling pipe, the exhaust channel, the air intake pipe, and the exhaust pipe in sequence, and finally the hot air is discharged from the cabinet. Then the pressure inside the cabinet is reduced, and the external cold air enters the circular hole through the space enclosed by the frame, and finally enters the interior of the cabinet, achieving balanced air pressure and further cooling.

[0009] Furthermore, the exhaust channel closing panel (559) is fixedly connected to the surface of the support plate, and an exhaust hole is provided on the side close to the exhaust pump (553), and the exhaust pipe passes through the exhaust hole and is fixedly connected. The exhaust channel closing panel (559) is provided with an air inlet hole on the side close to the closing plate, and the air inlet hole is arranged outward and obliquely downward in the shape of a long strip. The orifice plate is provided with an air inlet hole on the side close to the closing plate, and the exhausted hot air enters the outside through the exhaust hole, and the outside cold air enters the inside of the air inlet channel through the air inlet hole. The air inlet hole is inclined, and the outside air needs to go against gravity when entering, which can avoid the infiltration of rainwater and make it difficult for condensed water droplets to enter the air inlet hole.

[0010] Furthermore, the wire entry holes sequentially penetrate the two partitions opened on the cabinet plate and inside the cabinet. A plurality of wire entry holes are evenly arranged and are specifically arranged according to needs. A cone is fixedly connected to the inside of each wire entry hole. The cone is made of rubber material. The rubber cone can be deformed when the cable passes through, thereby sealing cables of different diameters. The rubber material can be insulated to prevent leakage inside the cabinet.

[0011] Furthermore, the spring plates are symmetrically arranged inside the cabinets on both sides and fixedly connected to the inner sides of the cabinets. A through hole is provided on the upper part of the spring plate and corresponds to the position of the wire entry hole. A clamping cylinder is fixedly connected to the through hole of the spring plate and is arranged in a conical shape. The diameter of the clamping cylinder decreases toward the side away from the wire entry hole of the cabinet, and the end with a small diameter of the clamping cylinder is toothed. The cables on both sides of the cabinet pass through the wire entry hole and enter the high-voltage chamber and the low-voltage chamber, and then pass through the clamping cylinder. The clamping cylinder expands and clamps the cable under the action of the restoring elastic force of the clamping cylinder. The diameter of the clamping cylinder on both sides gradually decreases toward the direction in which the cable is inserted, making it easier for the cable to be inserted from both sides. When pulled out in the opposite direction, the clamping cylinder is further tightened under the action of tension, and the friction resistance is increased, which can prevent the external cable from being loosened by external tension, and the toothed structure can further increase the roughness to obtain greater friction resistance to prevent the cable from being pulled off.

[0012] The present invention has the beneficial effects: The present invention provides a cooling device, and the support plate can hold up the cabinet to prevent the distribution component body from getting damp. The distribution component body generates heat during operation, and the heat is transferred to the cooling pipe and finally to the outside of the cabinet to achieve a cooling effect. The copper cooling pipe has a better thermal conductivity and can achieve better cooling. The distribution component body is placed inside the cabinet and is located inside a C-shaped structure formed by a number of cooling pipes. While being closer to the distribution component body, it can also have a certain limiting effect on the distribution component body.

[0013] The present invention provides a cooling pipe. When the gas is discharged, the heat generated by the operation of the distribution component body is also discharged along with the gas, thereby effectively reducing the temperature inside the cabinet and achieving a better cooling effect. As the air inside the cabinet is discharged, the air pressure inside the cabinet is reduced, and the outside air enters the cabinet through the circular hole, thereby balancing the air pressure inside the cabinet, avoiding negative pressure inside the cabinet and preventing the negative pressure from affecting the operation of the distribution component body. At the same time, the entry of cold air can further cool the interior of the cabinet, and the sealing plate and the frame make it possible for the circuit for the cooling pipe to discharge hot air and the circuit for the circular hole to replenish cold air to not interfere with each other.

[0014] The present invention sets a perforated plate, and the exhausted hot air enters the outside through the exhaust hole, and the cold air from the outside enters the cavity formed by the closing plate and the supporting plate through the air inlet hole. The air inlet hole is opened at an angle, and the outside air needs to go against gravity when entering, which can avoid the infiltration of rainwater and make it difficult for condensed water droplets to enter the air inlet hole.

[0015] The present invention provides a line entry mechanism, and the cables on both sides of the cabinet pass through the line entry holes and the clamping cylinder. The clamping cylinder expands and clamps the cables under the action of the restoring elastic force of the clamping cylinder. The diameters of the clamping cylinders on both sides decrease toward the sides approaching each other, making it easier for the cables to pass through from both sides. When pulled out in the reverse direction, the clamping cylinder is further tightened under the action of tension, and the friction resistance is increased, which can prevent the externally connected cables from being loosened by the external tension. The toothed structure can further increase the roughness to obtain greater friction resistance, preventing the cables from being pulled off. The tensioning structure of the line entry mechanism can tighten the cables to avoid cable clutter and facilitate maintenance. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] Figure 1 It is an overall schematic diagram of a box-type combined transformer for a power distribution network of the present invention; Figure 2 This is a schematic diagram of the internal structure of the cabinet of the present invention; Figure 3 It is a three-dimensional schematic diagram of the cooling system mechanism of the present invention; Figure 4 This is a schematic diagram of the cooling tube structure of the present invention; Figure 5 It is a schematic diagram of the cooling system structure of the present invention; Figure 6 This is a schematic diagram of the air inlet structure of the present invention; Figure 7 It is a schematic diagram of the cross-sectional structure of the cabinet of the present invention; Figure 8 It is a schematic diagram of the spring plate structure of the present invention.

[0017] In the figure: In the figure: 1. bottom plate; 2. support plate; 3. cabinet body; 4. rain shield; 5. cooling system mechanism; 50. cooling device; 51. cooling pipe; 52. connecting groove plate; 53. narrow groove; 54. round hole; 55. ventilation panel; 56. exhaust channel; 57. air intake channel; 551. cabinet bottom plate; 552. closing plate; 553. pump body; 554. exhaust pipe; 555. air intake pipe; 556. exhaust hole; 557. air intake hole; 558. square plate; 6. wire inlet mechanism; 61. wire inlet hole; 62. cone cylinder; 63. spring plate; 64. clamping cylinder; 7. partition; 8. cabinet door. DETAILED DESCRIPTION

[0018] The present invention is further described in detail below in conjunction with the accompanying drawings and specific embodiments. The embodiments of the present invention are provided for the purpose of illustration and description, and are not intended to be exhaustive or to limit the present invention to the disclosed forms. Many modifications and variations will be apparent to those of ordinary skill in the art. The embodiments are selected and described in order to better illustrate the principles and practical applications of the present invention, and to enable those of ordinary skill in the art to understand the present invention and thereby design various embodiments with various modifications suitable for specific uses.

[0019] Example 1, please refer to Figure 1-Figure 6 The present invention is a box-type combined transformer for a distribution network, comprising: A bottom plate 1, a support plate 2 is fixedly connected to the top of the bottom plate 1, a cabinet 3 is fixedly connected to the side of the support plate 2 away from the bottom plate 1, and a rain shield 4 is fixedly connected to the side of the cabinet 3 away from the support plate 2; The cooling device 50 has a waterproof structure and is used for cooling the interior of the cabinet 3. The cooling device 50 is fixedly connected to the bottom of the inner side of the cabinet 3; The line-incoming mechanism 6 has a tensioning structure for tensioning the cables on the incoming and outgoing sides, and the line-incoming mechanism 6 is fixedly connected to the inner side of the cabinet 3; The cooling device 50 includes: A cooling tube 51, which is made of copper and is used to absorb the heat generated by the power distribution assembly inside the cabinet 3. The side of the cooling tube 51 close to the support plate 2 passes through the cabinet bottom plate 551, and the outer side of the cooling tube 51 is fixedly connected to the inner side of the cabinet 3; A connecting slot plate 52, which is fixedly connected to a side of the cooling tube 51 away from the cabinet bottom plate 551, and the connecting slot plate 52 is set to be C-shaped, with the opening of the connecting slot plate 52 facing the opening of the cabinet 3, and a plurality of cooling tubes 51 are evenly distributed along the circumference of the connecting slot plate 52; The cooling pipe 51 has an air suction structure for extracting the high-temperature air inside the cabinet 3, and the ventilation panel 55 is fixedly connected to the support plate 2; The distribution component body is placed on the bottom plate 551 inside the cabinet 3. The support plate 2 can lift the cabinet 3 to prevent the distribution component body from getting damp. The cable enters the cabinet 3 through the line entry mechanism 6 and is connected to the distribution component body. The tensioning structure of the line entry mechanism 6 can tighten the cable to avoid cable clutter and facilitate maintenance. The distribution component body generates heat during operation, and the heat is transferred to the cooling tube 51 and finally transferred to the outside of the cabinet 3 to achieve a cooling effect. The copper cooling tube 51 has a better thermal conductivity and can achieve better cooling. The distribution component body is placed on the bottom plate 551 inside the cabinet 3 and is located inside a C-shaped structure formed by several cooling tubes 51, which can make the cooling component closer to the distribution component body and have a limiting effect on the distribution component body.

[0020] A partition 7 is fixedly connected to the inner side of the cabinet 3. Two partitions 7 are provided. The two partitions 7 evenly divide the inner cavity of the cabinet 3 into three parts. The inner wall of the cabinet 3 is rotatably connected to a cabinet door 8 through a rotating rod. The cabinet door 8 is locked, and there are three cabinet doors 8. The three cabinet doors 8 are respectively used to close the three parts of the inner cavity of the cabinet 3. The sides of the two partitions 7 away from each other are the high-voltage chamber and the low-voltage chamber, respectively. The transformer chamber is between the two partitions 7. The three cabinet doors 8 are respectively used to open the high-voltage chamber, the transformer chamber, and the low-voltage chamber, and the high-voltage cabinet, the low-voltage cabinet and the transformer body are placed accordingly.

[0021] There are three connecting slot plates 52, which are respectively arranged inside the high-voltage chamber, the transformer chamber and the low-voltage chamber, and a plurality of cooling pipes 51 are distributed on one side of the three connecting slot plates 52 close to the support plate 2. The three groups of cooling pipes 51 are respectively used for cooling the inside of the high-voltage chamber, the transformer chamber and the low-voltage chamber.

[0022] A narrow groove 53 is provided on the surface of the cooling pipe 51, and the opening of the narrow groove 53 is toward the side of the distribution component body. The ventilation pump 553 drives the gas flow inside the cooling pipe 51, and the air inside the cabinet 3 is sucked into the narrow groove 53 and finally discharged from the exhaust hole 556. When the gas is discharged, the heat generated by the operation of the distribution component body is also discharged along with the gas, thereby effectively reducing the temperature inside the cabinet 3 and achieving a better cooling effect.

[0023] A plurality of circular holes 54 are provided on the bottom plate 551 of the cabinet 3, which are evenly distributed within a C-shaped range surrounded by a plurality of cooling tubes 51. As the air inside the cabinet 3 is discharged, the air pressure inside the cabinet 3 decreases, and the outside air enters the air inlet channel 57 at the bottom of the cabinet 3 through the air inlet holes 557 on the ventilation panel 55 of the ventilation device, and enters the cabinet 3 through the circular holes 54 on the bottom plate 551 of the cabinet, thereby balancing the air pressure inside the cabinet 3, avoiding the generation of negative pressure inside the cabinet 3, and preventing the negative pressure from affecting the operation of the distribution component body. At the same time, the entry of cold air can further cool the inside of the cabinet 3.

[0024] The cooling device 50 includes a cooling pipe 51 and a connecting groove plate 52. The outer side surface of the cabinet bottom plate 551 is fixedly connected to the inner side surface of the support plate 2, and a plurality of circular holes 54 are arranged on the cabinet bottom plate 551. The exhaust channel 56 is arranged below the cabinet bottom plate near the support plate. The exhaust channel 56 is formed by closing the C-shaped closing plate 552, the support plate 2, the cabinet bottom plate 551, the bottom plate 1 and the ventilation panel 55. The inner cavity of the cooling pipe 51 is connected to the exhaust channel 56; the C-shaped closing plate 552, the cabinet bottom plate 551, the bottom plate 1 and the ventilation panel 55 are closed to form an air intake channel 57, and the inner cavity of the circular hole 54 is connected to the inner cavity of the air intake channel 57; the circuit for discharging hot air from the cooling pipe 51 and the circuit for replenishing cold air from the circular hole 54 do not interfere with each other.

[0025] A pump body 553 is provided near the ventilation panel 55 of the exhaust passage 56. The pump body 553 is fixedly connected to a square plate 558. The square plate 558 is fixedly connected to the closing plate 552 and the support plate 2, and is connected to the ventilation panel. An air inlet pipe 555 is fixedly connected to one end of the pump body 553 near the cooling pipe 51, and an exhaust pipe 554 is fixedly connected to one end of the pump body 553 away from the air inlet pipe 555. When the pump body 553 is started, air passes through the narrow slot 53, the cooling pipe 51, the air inlet pipe 555, and the exhaust pipe 554 in sequence, and finally the hot air is discharged from the cabinet 3. Then the internal pressure of the cabinet 3 is reduced, and the external cold air enters the cabinet 3 through the circular hole 54 through the air inlet passage 57, achieving balanced air pressure and further cooling.

[0026] The ventilation panel 55 is provided with through holes as exhaust holes 556 at both ends close to the support plate 2. The exhaust holes 556 are connected to the inner cavity of the exhaust pipe 554, and the exhaust pipe 555 is fixedly connected to the exhaust holes 557. The ventilation panel is provided with an air inlet hole 557 at the air inlet channel 57. The air inlet hole 557 is inclined to the side close to the bottom plate 1. The exhausted hot air enters the outside through the exhaust hole 554, and the outside cold air enters the inside of the air inlet channel 57 through the air inlet hole 557. The air inlet hole 557 is inclined, and the outside air needs to go against gravity when entering, which can avoid the infiltration of rainwater and make it difficult for condensed water droplets to enter the air inlet hole 557.

[0027] Example 2, please refer to Figure 1-Figure 8 The wire entry mechanism 6 includes a wire entry hole 61, which is opened on the outer side of the cabinet 3, and the wire entry hole 61 passes through the cabinet 3 and the two partitions 7 in sequence. A number of wire entry holes 61 are evenly arranged, and the inner sides of the wire entry holes 61 are fixedly connected with cones 62, and the positions where the cabinet 3 and the partition 7 are penetrated by the wire entry hole 61 are provided with cones 62, and the cones 62 are made of rubber material, and the cable passes through the cones 62. The rubber cone 62 can be deformed when the cable passes through, thereby sealing cables of different diameters, and the rubber material can be insulated to avoid leakage inside the cabinet 3.

[0028] The high and low pressure chambers of the cabinet body 3 are symmetrically provided with spring plates 63 on the inner side of the cabinet body away from the partition. The lower end of the spring plate 63 without a hole is fixedly connected to the inner side of the cabinet body 3 with the wire entry hole 61. The upper inner side of the spring plate 63 is fixedly connected with a clamping cylinder 64, and the clamping cylinder 64 corresponds to the wire entry hole position 61 one by one. The diameter of the clamping cylinder 64 gradually decreases along the direction in which the cable penetrates from the outside of the cabinet into the inside. The clamping cylinder 64 is set to be conical, and the end of the clamping cylinder 64 with a small diameter is toothed. The cables on both sides of the cabinet body 3 pass through the wire entry hole 61, and the entry The cable enters the high-pressure chamber and the low-pressure chamber, and then passes through the clamping cylinder 64. The clamping cylinder 64 expands, and the cable is clamped under the action of the elastic force of the clamping cylinder 64. The diameter of the clamping cylinder 64 on both sides gradually decreases in the direction of the cable insertion, making it easier for the cable to be inserted from both sides. When pulled out in the reverse direction, the clamping cylinder 64 is further tightened under the action of tension, and the friction resistance is increased, which can prevent the external cable from being loosened by external tension, and the toothed structure can further increase the roughness, obtain greater friction resistance, and prevent the cable from being pulled off.

[0029] When in use, open the cabinet door 8, and install the corresponding distribution component bodies to the high-voltage chamber, transformer chamber, and low-voltage chamber respectively. The cable passes through the cone cylinder 62 in the wire inlet hole 61 and is connected to the distribution component body. The cables on both sides of the cabinet 3 pass through the wire inlet hole 61 to enter the high-voltage chamber and the low-voltage chamber, and then pass through the clamping cylinder 64. The clamping cylinder 64 expands and clamps the cable under the action of the restoring elastic force of the clamping cylinder 64. Start the pump body 553, and the air passes through the narrow groove 53, the cooling pipe 51, the air inlet pipe 555, and the exhaust pipe 554 in turn. Finally, the hot air is discharged from the cabinet 3, and the exhausted hot air enters the outside through the exhaust hole 554. Then the internal pressure of the cabinet 3 is reduced, and the cold air from the outside enters the inside of the air inlet channel through the air inlet hole 557, passes through the circular hole 54, and finally enters the inside of the cabinet 3.

[0030] Obviously, the described embodiments are only some embodiments of the present invention, not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field and related fields without creative work should fall within the scope of protection of the present invention. The structures, devices and operating methods not specifically described and explained in the present invention are implemented according to the conventional means in the field unless otherwise specified and limited.

Claims

1. A box-type combined transformer for a distribution network, comprising a base plate, a support plate, a cabinet, a rain shield, a distribution component body, a cooling system mechanism and a line inlet mechanism; The power distribution assembly body includes a high voltage cabinet, a transformer and a low voltage cabinet; The inner space of the cabinet is divided into three independent cabinets by two built-in partitions, namely, a high-voltage room, a transformer room and a low-voltage room, corresponding to which the power distribution component bodies are placed. The middle cabinet is used to place the transformer body, and the two sides are used to place the high-voltage cabinet and the low-voltage cabinet respectively; the independent cabinets are installed with cabinet doors, and the cabinet doors are locked; The cooling system mechanism includes a cooling device and a ventilation device; the cooling device includes a cooling pipe and a connecting slot plate, and the ventilation device mainly includes a ventilation panel, an air intake channel, an exhaust channel, a ventilation pump and a connecting pipe; The cooling device connection slot plate has a waterproof structure and is fixedly connected to the lower inner side of the cabinet, and is arranged in a C-shape around the power distribution assembly, with the opening facing the cabinet opening; The wire feeding mechanism comprises a wire feeding hole, a cone cylinder, a spring plate and a clamping cylinder; The upper surface of the bottom plate is fixedly connected with a support plate, the support plate is surrounded in a C shape below the independent cabinet, a bottom plate is arranged at the bottom of the cabinet, the cabinet is fixedly connected with the support plate away from the upper edge of the bottom plate, and the rain shield is arranged on the top of the cabinet and fixedly connected to the cabinet; The power distribution assembly body is placed on the bottom plate of the cabinet and is surrounded by a C-shaped cooling device; The cooling pipe is fixed on the connecting groove plate, and a number of cooling pipes are evenly distributed along the connecting groove plate, and penetrate the cabinet on the side close to the supporting plate. The cooling pipe has an air suction structure for extracting high-temperature air from the cabinet, and the outer side of the cooling pipe is fixedly connected to the inner side of the cabinet; The ventilation panel of the ventilation device is located below the cabinet door, connected to the C-shaped support plate, and forms a closed space with the upper cabinet bottom plate and the bottom plate. The closed space under each independent cabinet is divided into an internal space by a C-shaped closing plate to form an exhaust channel closed by the support plate, the C-shaped closing plate, the cabinet bottom plate and the bottom plate, and an intermediate air intake channel closed by the C-shaped closing plate, the cabinet bottom plate and the bottom plate; exhaust holes are provided on the exhaust channel closing panel on both sides of the air intake hole of the ventilation panel; the ventilation pump is installed in the exhaust channel and fixed on the closing panel, one end of which is connected to the cooling pipe and the other end is connected to the exhaust pipe; The line-in mechanism has a tensioning structure for tensioning the cables at the line-in side and the line-out side, and the line-in mechanism is fixedly connected to the upper part of the inner side surface of the cabinet.

2. A box-type combined transformer for distribution network as claimed in claim 1, characterized in that: The cooling tube is made of copper and is used to absorb the heat generated by the power distribution components inside the cabinet.

3. The cooling tube according to claim 1 or 2, characterized in that: Features: A narrow groove is formed on the surface of the cooling tube, and the opening of the narrow groove faces the power distribution component body.

4. A box-type combined transformer for distribution network as claimed in claim 1, characterized in that: The connection slot plates are provided in three numbers and are respectively arranged inside the high voltage chamber, the transformer chamber and the low voltage chamber.

5. A box-type combined transformer for distribution network as claimed in claim 1, characterized in that: The bottom plate of the cabinet is provided with a plurality of circular holes which are evenly distributed within the C-shaped range surrounded by the cooling device.

6. A box-type combined transformer for distribution network as claimed in claim 1, characterized in that: The exhaust channel, the air intake channel (551) and the internal space of the independent cabinet are connected through the inner cavity of the cooling pipe to form a circulation channel.

7. A box-type combined transformer for distribution network as claimed in claim 1, characterized in that: The exhaust channel closing panel is fixedly connected to the surface of the support plate, and an exhaust hole is provided on the side close to the exhaust pump. The exhaust pipe passes through the exhaust hole and is fixedly connected. The exhaust channel closing panel 559) is provided with an air inlet hole on the side close to the closing plate, and the air inlet hole is arranged obliquely downward outward and has the shape of a long strip.

8. A box-type combined transformer for distribution network as claimed in claim 1, characterized in that: The wire inlet holes sequentially penetrate the two partitions opened on the cabinet plate and inside the cabinet. A plurality of wire inlet holes are evenly arranged and are specifically arranged according to needs. Conical cylinders are fixedly connected inside the wire inlet holes, and the cone cylinders are made of rubber material.

9. The wire entry hole according to claim 1 or 8, characterized in that: The spring plates are symmetrically arranged inside the cabinets on both sides and are fixedly connected to the inner side surfaces of the cabinets. A through hole is provided on the upper portion of the spring plate and corresponds to the position of the wire entry hole.

10. The spring plate according to claim 9, characterized in that: A clamping cylinder is fixedly connected in the spring plate through hole and is arranged in a conical shape. The diameter of the clamping cylinder gradually decreases along the direction in which the cable passes from the outside of the cabinet into the inside, and the end of the clamping cylinder with a small diameter is arranged in a tooth shape.

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