Fireproof and flame-retardant plug-in type double-shell bus duct

Abstract

The invention belongs to the technical field of bus ducts, and particularly relates to a fireproof and flame-retardant plug-in type double-shell bus duct which comprises a main body mechanism which comprises an outer shell A and an outer shell B. An inner shell A and an inner shell B are arranged on the inner sides of the outer shell A and the outer shell B. A bus main body is installed on the inner sides of the inner shell A and the inner shell B through a positioning frame. Connecting columns are arranged on the two sides of the inner shell A and the inner shell B, and a connecting base is arranged at the bottom of the inner side of the outer shell B; the invention aims to solve the problems that double-shell plug-in type bus ducts are mutually plugged together during use, the assembly is not stable enough during installation and use, and the fire-resistant and flame-retardant effects are poor. Through the designed main body mechanism, the inner shell A and the inner shell B are installed through clamping of the outer shell A and the outer shell B during use, the fire-resistant and flame-retardant capability of the bus duct is enhanced through the fire-resistant and flame-retardant plates outside the inner shell A and the inner shell B, and the inner shell A and the inner shell B are conveniently and rapidly installed through the outer shell A and the outer shell B.

Description

Technical Field

[0001] The present invention belongs to the technical field of bus ducts, and particularly relates to a fire-resistant and flame-retardant plug-in double-shell bus duct. Background Art

[0002] As a key power distribution device in the power system, plug-in bus ducts are widely used in the fields of current transmission and power distribution. Traditional bus ducts usually adopt a single-shell structure, which is made of conductive materials such as copper or aluminum, and realizes plug-in connection through modular design to meet the flexibility requirements of installation and maintenance. However, the plug-in bus ducts in the prior art have the following significant problems: 1. Insufficient fire-resistant and flame-retardant performance: In a high-temperature or fire environment, the fire-resistant performance of the shell material and the internal insulation components of traditional bus ducts is poor, which easily leads to structural damage or power interruption, and it is difficult to meet the application scenario requirements of high safety standards; 2. Low heat dissipation efficiency: A large amount of heat is generated due to current load during the long-term operation of the bus duct, and the existing heat dissipation designs mostly rely on natural convection or simple air cooling, with limited heat dissipation effect, which easily causes local overheating, accelerates the aging of insulation materials, and even poses potential safety hazards; 3. Poor installation stability: The plug-in connection structure lacks effective mechanical fixation and anti-seismic design during assembly, and is prone to connection loosening due to external force or vibration, affecting the conductive performance and system reliability; 4. Complex double-shell structure: The assembly process of the existing double-shell bus duct is cumbersome, and the positioning and fixing methods between the inner and outer shells are not efficient enough, increasing the difficulty of installation and maintenance; Therefore, it is necessary to design a fire-resistant and flame-retardant plug-in double-shell bus duct to solve the above problems. Summary of the Invention

[0003] The purpose of the present invention is to provide a fire-resistant and flame-retardant plug-in double-shell bus duct to solve the problems mentioned in the above background art.

[0004] To achieve the above purpose, the present invention provides the following technical solution: A fire-resistant and flame-retardant plug-in double-shell bus duct, comprising: A main body mechanism, including an outer shell A and an outer shell B. The inner sides of the outer shell A and the outer shell B are provided with an inner shell A and an inner shell B. A bus main body is installed on the inner sides of the inner shell A and the inner shell B through a positioning frame. Connecting columns are arranged on both sides of the inner shell A and the inner shell B. A connecting seat is arranged at the bottom of the inner side of the outer shell B. The lower ends of the connecting columns pass through the outer shell A, the inner shell A and the inner shell B through connecting perforations and are screwed to the connecting seat; The heat dissipation mechanism includes a heat insulation plate installed between the outer casing A and the inner casing B. A circulation pump is provided on the outer sides of the outer casing A and the outer casing B. The circulation pump is communicated with the inner side of the heat insulation plate. A heat dissipation rack is arranged between the circulation pumps. A heat conduction tube is provided on the outer side of the heat insulation plate, and the heat conduction tube is located between the busbar bodies. The hoisting mechanism includes a hoisting pallet, hoisting plates fixed at both ends of the hoisting pallet, and a hoisting pressing plate installed between the hoisting plates. The outer casing A and the outer casing B are installed on the upper side of the hoisting pallet. The hoisting pressing plate presses on the outer casing A. Hoisting grooves are formed on the surfaces of the outer casing A and the outer casing B. The hoisting pallet and the hoisting pressing plate are engaged in the hoisting grooves.

[0005] Preferably, the inner casing A includes a connecting frame, a top plate and side plates. The top plate and the side plates are respectively installed on both sides of the connecting frame. A square is formed among the connecting frame, the top plate and the side plates. The positioning frame and the busbar body are installed in the connecting frame, the top plate and the side plates, and the structure of the inner casing B is the same as that of the inner casing A.

[0006] Preferably, fireproof and flame-retardant plates are provided on the inner sides of the top plate and the side plates. The connecting frame, the top plate, the side plates and the fireproof and flame-retardant plates are all fitted and installed on the inner walls of the outer casing A and the outer casing B.

[0007] Preferably, a socket is installed on the inner side of one end of the outer casing A. A partition is provided on the inner side of the outer casing A, and the partition is located between the busbar bodies. A communicating plate is provided on the surface of the partition. A pressing groove is formed on the inner side of the socket. A pressing plate is slidably installed in the pressing groove. A pressing screw is screwed on the outer side of the outer casing A, and one end of the pressing screw presses on the pressing plate.

[0008] Preferably, a splicing protrusion is provided on one side of the outer casing A, and a splicing groove is provided on one side of the outer casing B. The outer casing A and the outer casing B are engaged through the splicing protrusion and the splicing groove.

[0009] Preferably, communication ports are provided at both ends of the heat insulation plate. One end of the circulation pump is communicated with the inner side of the heat conduction tube through the communication port. A heat dissipation tube is provided inside the heat dissipation rack. The other end of the circulation pump is communicated with the end of the heat dissipation tube. Heat conduction sheets are provided inside the heat conduction tube, and a diversion plate is provided at one end of the heat conduction tube.

[0010] Preferably, heat insulation sheets are provided inside the heat dissipation rack. The heat dissipation tube is located on one side of the heat insulation sheets. A heat conduction film is attached to one side of the heat dissipation tube. A heat conduction plate is provided inside the heat dissipation rack. Both sides of the heat conduction film are respectively attached to the heat dissipation tube and the heat conduction plate. A heat dissipation fin is fixedly installed on one side of the heat conduction plate. A heat dissipation fan is provided on one side of the heat dissipation rack.

[0011] Preferably, the cross-sectional shape of the heat dissipation fin is set as a V shape, and the tip direction of the heat dissipation fin corresponds to the position of the heat dissipation fan. Heat dissipation protrusions are provided on the surface of the heat dissipation fin.

[0012] Preferably, an installation groove is provided on one side of the heat dissipation rack, and installation strips are provided on the outer sides of the outer casing A and the outer casing B. The installation groove is engaged with the installation strip.

[0013] Preferably, an adjusting screw rod is rotatably installed inside the lifting plate. The lower end of the adjusting screw rod is rotatably installed inside the lifting support plate and fixedly installed with a driving worm gear. Adjusting knobs are provided at both ends of the lifting support plate. Adjusting nuts are fixedly installed at both ends of the lifting pressure plate. The adjusting nuts are screwed onto the adjusting screw rod through threads; transmission worm shafts are rotatably installed inside both ends of the lifting support plate. One end of the transmission worm shaft passes through the lifting support plate and is fixedly installed with an adjusting knob.

[0014] Compared with the prior art, the beneficial effects of the present invention are as follows: 1. Through the designed main body mechanism, when in use, the inner casing A and the inner casing B are installed by engaging the outer casing A and the outer casing B. The fire-resistant and flame-retardant plates outside the inner casing A and the inner casing B enhance the fire-resistant and flame-retardant ability of the busbar chute, and it is convenient to quickly install the inner casing A and the inner casing B through the outer casing A and the outer casing B.

[0015] 2. Through the designed heat dissipation mechanism, when in use, heat is absorbed by installing the heat conduction tube and the heat absorption medium between the busbar main bodies, and then the heat absorption medium is pumped by the circulation pump to flow inside the heat conduction tube and the heat dissipation rack, so as to quickly take out the heat for dissipation.

[0016] 3. Through the designed hoisting mechanism, when in use, the hoisting mechanism and the heat dissipation mechanism are staggeredly installed. The driving worm shaft and the driving worm gear drive to make the clamping installation of the lifting pressure plate and the lifting support plate on the main body mechanism more stable, and the busbar chutes of various heights can be hoisted as needed. The hoisting pressure plate and the lifting support plate are engaged through the hoisting groove, so as to ensure more stable hoisting and installation when the outer casing A and the outer casing B are used. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] Figure 1 is a structural schematic diagram of the present invention; Figure 2 is a cross-sectional structural schematic diagram of the present invention; Figure 3 is a structural schematic diagram of the heat conduction copper tube of the present invention; Figure 4 is a structural schematic diagram of the heat conduction fin of the present invention; Figure 5 is a structural schematic diagram of the heat dissipation rack of the present invention; Figure 6 is a structural schematic diagram of the heat dissipation fin of the present invention; Figure 7 is a structural schematic diagram of the connection of the present invention; Figure 8 is a structural schematic diagram of the hoisting mechanism of the present invention; Figure 9 Schematic diagram of the plug-in structure of the present invention; In the figure: 1. Main body mechanism; 11. Outer shell A; 111. Plug socket; 112. Partition board; 113. Connecting board; 114. Compression groove; 115. Compression screw; 116. Compression plate; 12. Outer shell B; 13. Inner shell A; 131. Connecting frame; 132. Top plate; 133. Side plate; 134. Connecting column; 135. Connecting seat; 136. Connecting through hole; 14. Inner shell B; 15. Fireproof and flame-retardant board; 16. Splicing protrusion; 17. Splicing groove; 18. Busbar main body; 2. Heat dissipation mechanism; 21. Heat conduction pipe; 22. Positioning frame; 23. Heat insulation board; 24. Circulation pump; 25. Heat dissipation frame; 251. Heat dissipation pipe; 252. Heat insulation sheet; 253. Heat conduction film; 254. Heat conduction plate; 255. Heat dissipation fin; 256. Heat dissipation fan; 257. Installation groove; 258. Installation strip; 259. Heat dissipation protrusion; 26. Heat conduction sheet; 27. Deflector; 28. Communication port; 3. Hoisting mechanism; 31. Hoisting groove; 32. Hoisting support plate; 33. Hoisting plate; 34. Hoisting pressure plate; 35. Adjusting screw; 36. Adjusting nut; 37. Adjusting knob; 38. Driving worm; 39. Driving worm gear. Specific embodiments

[0018] Next, the technical solutions in the embodiments of the present invention will be clearly and completely described in conjunction with the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are only a part of the embodiments of the present invention, rather than all the embodiments. All other embodiments obtained by those of ordinary skill in the art based on the embodiments of the present invention without creative efforts shall fall within the protection scope of the present invention.

[0019] Embodiment 1: Please refer to Figures 1 to 9 , the present invention provides a technical solution: a fireproof and flame-retardant plug-in double-shell busbar, including a main body mechanism 1, a heat dissipation mechanism 2 is arranged on one side of the main body mechanism 1, and a hoisting mechanism 3 is arranged at the end of the main body mechanism 1; The main body mechanism 1 includes an outer housing A11 and an outer housing B12. An inner housing A13 and an inner housing B14 are arranged on the inner sides of the outer housing A11 and the outer housing B12. A busbar main body 18 is installed on the inner sides of the inner housing A13 and the inner housing B14 through a positioning frame 22. Connecting columns 134 are arranged on both sides of the inner housing A13 and the inner housing B14. A connecting seat 135 is arranged at the inner bottom of the outer housing B12. The lower ends of the connecting columns 134 pass through the outer housing A11, the inner housing A13 and the inner housing B14 through connecting through holes 136 and are screwed to the connecting seat 135. The inner housing A13 includes a connecting frame 131, a top plate 132 and side plates 133. The top plate 132 and the side plates 133 are respectively installed on both sides of the connecting frame 131. A square is formed among the connecting frame 131, the top plate 132 and the side plates 133. The positioning frame 22 and the busbar main body 18 are installed inside the connecting frame 131, the top plate 132 and the side plates 133. And the structure of the inner housing B14 is the same as that of the inner housing A13. The inner housing A13 and the inner housing B14 are formed by the connecting frame 131, the top plate 132 and the side plates 133. The positioning frame 22 and the busbar main body 18 are installed inside the inner housing A13 and the inner housing B14. Fireproof and flame-retardant plates 15 are arranged on the inner sides of the top plate 132 and the side plates 133. The connecting frame 131, the top plate 132, the side plates 133 and the fireproof and flame-retardant plates 15 are all fitted and installed on the inner walls of the outer housing A11 and the outer housing B12 to enhance the fireproof and flame-retardant effect of the busbar trough through the fireproof and flame-retardant plates 15. A socket 111 is installed on the inner side of one end of the outer housing A11. A partition 112 is arranged on the inner side of the outer housing A11. The partition 112 is located between the busbar main bodies 18. A communication plate 113 is arranged on the surface of the partition 112. A pressing groove 114 is formed inside the socket 111. A pressing plate 116 is slidably installed inside the pressing groove 114. A pressing screw 115 is screwed on the outer side of the outer housing A11. One end of the pressing screw 115 presses on the pressing plate 116. When the busbar troughs are plugged, the outer housing A11 and the outer housing B12 are butted. And the socket 111 is installed inside the outer housing A11 and the outer housing B12. The busbar main bodies 18 are installed between the partitions 112. By screwing the pressing screw 115 on the outer housing A11 and the outer housing B12, and the pressing screw 115 passes through the socket 111 and presses on the pressing plate 116, the pressing plate 116 presses on the busbar main body 18, and the busbar main body 18 presses on the communication plate 113 to achieve connection. The heat dissipation mechanism 2 includes a heat insulation plate 23 installed between the inner housing A13 and the inner housing B14. A circulation pump 24 is provided on the outer sides of the outer housing A11 and the outer housing B12. The circulation pump 24 is communicated with the inner side of the heat insulation plate 23. A heat dissipation rack 25 is arranged between the circulation pumps 24. A heat conduction pipe 21 is provided on the outer side of the heat insulation plate 23, and the heat conduction pipe 21 is located between the busbar bodies 18. A splicing protrusion 16 is provided on one side of the outer housing A11, and a splicing groove 17 is provided on one side of the outer housing B12. The outer housing A11 and the outer housing B12 are clamped through the splicing protrusion 16 and the splicing groove 17, and the outer housing A11 and the outer housing B12 are clamped and positioned through the splicing protrusion 16 and the splicing groove 17. An installation groove 257 is provided on one side of the heat dissipation rack 25, and installation strips 258 are provided on the outer sides of the outer housing A11 and the outer housing B12. The installation groove 257 is clamped on the installation strip 258. During installation, the heat dissipation rack 25 is installed on the outer sides of the outer housing A11 and the outer housing B12 through the clamping of the installation strip 258 and the installation groove 257, and while installing the heat dissipation rack 25, the connection between the outer housing A11 and the outer housing B12 is made more stable.

[0020] As can be seen from the above description, the present invention has the following beneficial effects: During use, the inner housing A13 and the inner housing B14 are installed by clamping the outer housing A11 and the outer housing B12. The fire-resistant and flame-retardant ability of the busbar duct is enhanced by the fire-resistant and flame-retardant plates 15 outside the inner housing A13 and the inner housing B14, and the inner housing A13 and the inner housing B14 can be conveniently and quickly installed through the outer housing A11 and the outer housing B12.

[0021] Embodiment 2: Please refer to Figures 1 to 8As shown, on the basis of the first embodiment, the present invention provides a technical solution: both ends of the heat insulation board 23 are provided with connecting ports 28, one end of the circulation pump 24 is connected with the inner side of the heat conducting pipe 21 through the connecting ports 28, a heat dissipation pipe 251 is provided on the inner side of the heat dissipation frame 25, the other end of the circulation pump 24 is connected with the end of the heat dissipation pipe 251, a heat conducting sheet 26 is provided inside the heat conducting pipe 21, and a guide plate 27 is provided at one end of the heat conducting pipe 21. When in use, the circulation pump 24 is operated to make the heat conducting medium flow in the heat conducting pipe 251 and the heat conducting pipe 21, and the heat is guided to the internal heat conducting medium through the heat conducting pipe 21 and the heat conducting sheet 26, so as to extract and dissipate the heat; a heat insulation sheet 252 is provided inside the heat dissipation frame 25, and the heat dissipation pipe 251 is located on one side of the heat insulation sheet 252, so as to dissipate the heat. A heat-conducting film 253 is attached to one side of the tube 251, and heat conduction is accelerated by the horizontal heat conduction of the heat-conducting graphite film. A heat-conducting plate 254 is arranged on the inner side of the heat dissipation frame 25. The two sides of the heat-conducting film 253 are respectively attached to the heat dissipation tube 251 and the heat-conducting plate 254. A heat sink 255 is fixedly installed on one side of the heat-conducting plate 254. A heat dissipation fan 256 is arranged on one side of the heat dissipation frame 25. When in use, the airflow and the heat sink 255 are operated by the heat dissipation fan 256 to accelerate the heat dissipation effect, thereby ensuring a better heat dissipation effect. The cross-sectional shape of the heat sink 255 is set to be V-shaped, and the tip direction of the heat sink 255 corresponds to the position of the heat dissipation fan 256. The surface of the heat sink 255 is provided with a heat dissipation protrusion 259, which facilitates the flow of air when in use and cooperates with the heat dissipation protrusion 259 to accelerate heat dissipation.

[0022] The heat dissipation mechanism 2 using the above technical solution is installed between the busbar body 18 to absorb heat through the heat pipe 21 and the heat absorbing medium when in use, and then the heat absorbing medium is drawn by the circulation pump 24 to flow in the heat pipe 21 and the heat dissipation frame 25, so as to quickly remove the heat for dissipation.

[0023] For further information, see Figure 1 and Figure 9, the hoisting mechanism 3 includes a hoisting pallet 32, hoisting plates 33 fixed at both ends of the hoisting pallet 32, and a hoisting pressure plate 34 installed between the hoisting plates 33. The outer housing A11 and the outer housing B12 are installed on the upper side of the hoisting pallet 32. The hoisting pressure plate 34 presses on the outer housing A11. Hoisting grooves 31 are formed on the surfaces of the outer housing A11 and the outer housing B12. The hoisting pallet 32 and the hoisting pressure plate 34 are engaged in the hoisting grooves 31. The hoisting pallet 32 is installed on the lower side of the outer housing B12 through the hoisting grooves 31, and the hoisting pressure plate 34 is pressed down into the hoisting groove 31 on the upper side of the outer housing A11 for installation; an adjusting screw 35 is rotatably installed inside the hoisting plate 33. The lower end of the adjusting screw 35 is rotatably installed inside the hoisting pallet 32 and fixedly installed with a driving worm gear 39. Driving worms 38 are rotatably installed inside both ends of the hoisting pallet 32. One end of the driving worm 38 passes through the hoisting pallet 32 and is fixedly installed with an adjusting knob 37. Adjusting nuts 36 are fixedly installed at both ends of the hoisting pressure plate 34. The adjusting nuts 36 are screwed onto the adjusting screw 35 through threads. Rotating the adjusting knob 37 drives the adjusting screw 35 to rotate in cooperation with the transmission of the driving worm 38 and the driving worm gear 39. The adjusting screw 35 drives the adjusting nuts 36 and the hoisting pressure plate 34 to descend.

[0024] For the hoisting mechanism 3 adopting the above technical solution, when in use, the hoisting mechanism 3 and the heat dissipation mechanism 2 are installed in a staggered position. The driving worm 38 and the driving worm gear 39 drive the hoisting pressure plate 34 and the hoisting pallet 32 to clamp and install the main body mechanism 1 more stably, and various height busbars can be hoisted as needed. The hoisting pressure plate 34 and the hoisting pallet 32 are engaged through the hoisting grooves 31, so as to ensure more stable hoisting and installation of the outer housing A11 and the outer housing B12.

[0025] Working principle and usage process of the present invention: When in use, the inner housing A13 and the inner housing B14 are formed by the connecting frame 131, the top plate 132 and the side plate 133. The positioning frame 22 and the bus bar main body 18 are installed inside the inner housing A13 and the inner housing B14. The fireproof and flame-retardant board 15 is snap-fitted and installed on the outer sides of the inner housing A13 and the inner housing B14. Then, the inner housing A13 and the inner housing B14 are superposed and installed inside the outer housing B12 and the outer housing A11, and the heat insulation board 23 is installed between the inner housing A13 and the inner housing B14. The heat conduction tubes 21 on the outer side of the heat insulation board 23 are inserted into the inner housing A13 and the inner housing B14, and the heat insulation board 23 is located between the bus bar main bodies 18 and is in contact with the surfaces of the bus bar main bodies 18. Then, the outer housing A11 and the outer housing B12 are snap-fitted and spliced through the splicing protrusions 16 and the splicing grooves 17. Then, one end of the connecting column 134 passes through the outer housing A11, the inner housing A13 and the inner housing B14, and one end of the connecting column 134 is screwed into the connecting seat 135, so that the outer housing A11 and the outer housing B12 clamp and fix the inner housing A13 and the inner housing B14. The heat dissipation frame 25 is installed on the outer sides of the outer housing A11 and the outer housing B12 by snap-fitting through the installation strip 258 and the installation groove 257. While installing the heat dissipation frame 25, ensure that the connection between the outer housing A11 and the outer housing B12 is more stable. Then, the circulation pump 24 is installed at the end of the heat dissipation frame 25, so that one end of the circulation pump 24 passes through the outer housing A11, the inner housing A13 and the inner housing B14 and is communicated with the communication port 28. The other end of the circulation pump 24 is communicated with one end of the heat dissipation tube 251. The inner housing A13 and the inner housing B14 are installed inside the outer housing A11 and the outer housing B12, and the bus bar main body 18 is installed between the partition plates 112. By screwing the compression screw 115 on the outer housing A11 and the outer housing B12, and the compression screw 115 passes through the insertion seat 111 and presses on the compression plate 116, so that the compression plate 116 presses on the bus bar main body 18, and the bus bar main body 18 presses on the communication plate 113 to be communicated. Then, the hoisting support plate 32 is installed under the outer housing B12 through the hoisting groove 31. During hoisting, the adjusting knob 37 is rotated to drive the adjusting screw 35 to rotate by the transmission of the transmission worm 38 and the transmission worm wheel 39. The adjusting screw 35 drives the adjusting nut 36 and the hoisting pressing plate 34 to descend, so that the hoisting pressing plate 34 presses down into the hoisting groove 31 on the upper side of the outer housing A11, so as to ensure that the installation of the outer housing A11 and the outer housing B12 is more stable. When in use, the bus bar main body 18 generates heat, and the heat is guided to the internal heat conduction medium through the heat conduction tube 21 and the heat conduction sheet 26. Then, the heat conduction medium flows in the heat dissipation tube 251 and the heat conduction tube 21 by the operation of the circulation pump 24, and the heat is conducted outward through the heat conduction film 253 and the heat conduction plate 254, and the outward heat dissipation is accelerated by the operation of the heat dissipation fins 255 and the heat dissipation fan 256.

[0026] It should be noted that in this text, relational terms such as "first" and "second" are only used to distinguish one entity or operation from another entity or operation, and do not necessarily require or imply any actual relationship or order between these entities or operations. Moreover, the terms "comprising", "including" or any other variants thereof are intended to cover non-exclusive inclusion, so that a process, method, article or device comprising a series of elements not only includes those elements, but also includes other elements not expressly listed, or further includes elements inherent to such process, method, article or device. Without further limitation, an element defined by the statement "comprising an..." does not exclude the presence of additional identical elements in the process, method, article or device comprising the said element.

[0027] As described above, it is only used to illustrate the technical solution of the present invention rather than to limit it. Other modifications or equivalent replacements made by those of ordinary skill in the art to the technical solution of the present invention should be covered within the scope of the claims of the present invention as long as they do not depart from the spirit and scope of the technical solution of the present invention.

Claims

1. A fire-resistant and flame-retardant plug-in double-shell bus duct, characterized in that: include: A main body mechanism (1) comprises an outer shell A (11) and an outer shell B (12), wherein an inner shell A (13) and an inner shell B (14) are arranged on the inner sides of the outer shell A (11) and the outer shell B (12), a busbar body (18) is installed on the inner sides of the inner shell A (13) and the inner shell B (14) via a positioning frame (22), connecting columns (134) are arranged on both sides of the inner shell A (13) and the inner shell B (14), a connecting seat (135) is arranged on the inner bottom of the outer shell B (12), and the lower end of the connecting column (134) passes through the outer shell A (11), the inner shell A (13) and the inner shell B (14) via a connecting through hole (136) and is screwed and connected to the connecting seat (135); The heat dissipation mechanism (2) comprises a heat insulation plate (23) installed between an inner shell A (13) and an inner shell B (14); a circulation pump (24) is arranged outside the outer shell A (11) and the outer shell B (12); the circulation pump (24) is connected to the inner side of the heat insulation plate (23); a heat dissipation frame (25) is arranged between the circulation pumps (24); a heat conduction pipe (21) is arranged outside the heat insulation plate (23); and the heat conduction pipe (21) is located between the busbar bodies (18); The lifting mechanism (3) comprises a lifting support plate (32), lifting plates (33) fixed at both ends of the lifting support plate (32), and a lifting pressure plate (34) installed between the lifting plates (33); the outer shell A (11) and the outer shell B (12) are installed on the upper side of the lifting support plate (32); the lifting pressure plate (34) is pressed on the outer shell A (11); the surfaces of the outer shell A (11) and the outer shell B (12) are provided with lifting grooves (31); the lifting support plate (32) and the lifting pressure plate (34) are engaged in the lifting grooves (31).

2. The bus duct according to claim 1, characterized in that: The inner housing A (13) comprises a connecting frame (131), a top plate (132) and a side plate (133); the top plate (132) and the side plate (133) are respectively mounted on both sides of the connecting frame (131); the connecting frame (131), the top plate (132) and the side plate (133) form a square; the positioning frame (22) and the busbar body (18) are mounted in the connecting frame (131), the top plate (132) and the side plate (133); and the structure of the inner housing B (14) is the same as that of the inner housing A (13).

3. The bus duct according to claim 2, characterized in that: The inner sides of the top plate (132) and the side plates (133) are both provided with fire-resistant flame-retardant plates (15), and the connecting frame (131), the top plate (132), the side plates (133) and the fire-resistant flame-retardant plates (15) are all fitted and mounted on the inner walls of the outer shell A (11) and the outer shell B (12).

4. The bus duct according to claim 1, characterized in that: A socket (111) is installed on the inner side of one end of the outer shell A (11), a partition (112) is arranged on the inner side of the outer shell A (11), the partition (112) is located between the busbar bodies (18), a connecting plate (113) is arranged on the surface of the partition (112), a pressing groove (114) is opened on the inner side of the socket (111), a pressing plate (116) is slidably installed on the inner side of the pressing groove (114), a pressing screw (115) is screwed on the outer side of the outer shell A (11), and one end of the pressing screw (115) is pressed tightly on the pressing plate (116).

5. The bus duct according to claim 1, characterized in that: A splicing protrusion (16) is provided on one side of the outer shell A (11), and a splicing slot (17) is provided on one side of the outer shell B (12); the outer shell A (11) and the outer shell B (12) are engaged with each other via the splicing protrusion (16) and the splicing slot (17).

6. The bus duct according to claim 1, characterized in that: Both ends of the heat insulation board (23) are provided with communication ports (28); one end of the circulation pump (24) is connected to the inner side of the heat conducting pipe (21) through the communication port (28); a heat dissipation pipe (251) is provided on the inner side of the heat dissipation frame (25); the other end of the circulation pump (24) is connected to the end of the heat dissipation pipe (251); a heat conducting sheet (26) is provided inside the heat conducting pipe (21); and a guide plate (27) is provided at one end of the heat conducting pipe (21).

7. The bus duct according to claim 6, characterized in that: A heat insulating sheet (252) is arranged inside the heat dissipation frame (25), the heat dissipation pipe (251) is located on one side of the heat insulating sheet (252), a heat conductive film (253) is attached to one side of the heat dissipation pipe (251), a heat conductive plate (254) is arranged inside the heat dissipation frame (25), two sides of the heat conductive film (253) are attached to the heat dissipation pipe (251) and the heat conductive plate (254) respectively, a heat dissipation sheet (255) is fixedly mounted on one side of the heat conductive plate (254), and a heat dissipation fan (256) is arranged on one side of the heat dissipation frame (25).

8. The bus duct according to claim 7, characterized in that: The cross-sectional shape of the heat sink (255) is set to be V-shaped, and the tip direction of the heat sink (255) corresponds to the position of the heat sink fan (256), and the surface of the heat sink (255) is provided with a heat dissipation protrusion (259).

9. The bus duct according to claim 1, characterized in that: A mounting groove (257) is provided on one side of the heat dissipation frame (25), and mounting strips (258) are provided on the outer sides of the outer shell A (11) and the outer shell B (12), and the mounting groove (257) is engaged with the mounting strip (258).

10. The bus duct according to claim 1, characterized in that: An adjusting screw (35) is rotatably mounted inside the lifting plate (33), the lower end of the adjusting screw (35) is rotatably mounted inside the lifting support plate (32) and fixedly mounted with a transmission worm gear (39), both ends of the lifting support plate (32) are provided with adjusting knobs (37), both ends of the lifting pressure plate (34) are fixedly mounted with adjusting nuts (36), the adjusting nuts (36) are screwed onto the adjusting screw (35) through threads; and a transmission worm (38) is rotatably mounted inside the both ends of the lifting support plate (32), one end of the transmission worm (38) passes through the lifting support plate (32) and fixedly mounted with an adjusting knob (37).

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