A heat dissipation and fire prevention bus duct

Abstract

The present application relates to a heat-dissipating and fire-proof bus duct, comprising a bus duct shell and a conductor group, the conductor group being arranged in the bus duct shell, and further comprising an air guide channel and a heat dissipating fan, the bus duct shell being provided with an air inlet at a first end and an air outlet at a second end, the air guide channel being provided with an air guide inlet and an air guide outlet, the air guide outlet being connected to the air inlet, the heat dissipating fan generating a heat dissipating airflow and introducing the heat dissipating airflow into the air guide inlet, the heat dissipating airflow flowing through the air guide channel into the bus duct shell from the air inlet, flowing through the bus duct shell and out from the air outlet to take away the heat generated at various locations of the conductor group; the air inlet and the air outlet are respectively arranged at both ends of the bus duct shell, after the heat dissipating airflow enters from the air inlet, can pass through both ends of the bus duct shell, that is, the heat dissipating airflow flows through various locations of the conductor group, can take away the heat at various locations of the conductor group, and the heat dissipation is more uniform.

Description

Technical Field

[0001] The present application relates to the technical field of energy-saving equipment, and in particular to a heat-dissipating and fire-proof bus duct. Background Art

[0002] The bus duct is a closed power transmission device composed of copper and aluminum busbars. It is used to efficiently transmit electrical energy and is particularly suitable for high-power, high-current applications such as large buildings, factories, and data centers. If the bus duct temperature is too high, it will cause excessive heating of the internal components of the bus duct, which will affect the service life. Simply dissipating heat from the bus duct shell alone will not achieve a good cooling effect. The bus duct is relatively long, and traditional heat dissipation methods are also difficult to dissipate heat evenly throughout the conductor groups of the bus duct, resulting in heat accumulation and temperature increase in local parts of the conductor groups. In addition, the heat dissipation holes opened in the bus duct shell can cause high-temperature gases to flow back into the bus duct shell from the heat dissipation holes in the event of a fire. The insulating material wrapped around the conductor groups is easily damaged, causing damage to the bus duct. Summary of the Invention

[0003] Based on the above technical problems, the present application provides a heat-dissipating and fire-proof bus duct, which has good heat dissipation effect.

[0004] A heat-dissipating and fire-proof bus duct includes a bus duct shell and a wire group. The wire group is arranged in the bus duct shell. The bus duct also includes an air guide channel and a heat dissipation fan. The bus duct shell is provided with an air inlet at the first end and an air outlet at the second end. The air guide channel is provided with an air guide inlet and an air guide outlet. The air guide outlet is connected to the air inlet. The heat dissipation fan generates a heat dissipation airflow and introduces it into the air guide inlet. The heat dissipation airflow flows through the air guide channel into the bus duct shell from the air inlet, flows through the bus duct shell and flows out from the air outlet to take away the heat generated at various places of the wire group.

[0005] The air inlet and outlet are respectively arranged at the two ends of the bus duct shell. After the heat dissipation airflow enters from the air inlet, it can pass through the two ends of the bus duct shell. In other words, the heat dissipation airflow flows through all parts of the wire group, which can take away the heat from all parts of the wire group and dissipate heat evenly.

[0006] In an optional embodiment, the heat dissipation fan includes a heat dissipation fan and a fan driving device, the fan driving device includes a gas heating cylinder, a gas cooling cylinder, an insulating transmission rod, a cooling piston rod and a piston linkage mechanism, the insulating transmission rod is movably connected to the gas heating cylinder and can reciprocate relative to the gas heating cylinder, the cooling piston rod is movably connected to the gas cooling cylinder and can reciprocate relative to the gas cooling cylinder, the insulating transmission rod is provided with an insulating disc, and there is a gap between the edge of the insulating disc and the inner wall of the gas heating cylinder so that air can flow back and forth on both sides of the insulating disc, the gas heating cylinder and the gas cooling cylinder are connected so that air can exchange between the gas heating cylinder and the gas cooling cylinder. In an alternating cycle, a heat conduction port is provided at the second end of the bus duct shell, and the heating surface of the gas heating cylinder is located at the heat conduction port to receive heat from the bus duct shell to heat the gas. The gas in the gas heating cylinder expands due to the heat and flows into the gas cooling cylinder through the gap between the heat insulating disc and the gas heating cylinder to push the cooling piston rod to move in the gas cooling cylinder. The cooling piston rod is connected to the heat insulating transmission rod through a piston linkage mechanism to push the heat insulating transmission rod to move in the gas heating cylinder. The piston linkage mechanism is connected to the cooling fan. The heat insulating transmission rod and the cooling piston rod are alternately driven to drive the piston linkage mechanism to rotate, and the piston linkage mechanism drives the cooling fan to rotate to generate a cooling airflow.

[0007] The insulated transmission rod and cooling piston rod operate in separate cylinders. These two cylinders are interconnected, creating a thermodynamic cycle based on the expansion and compression of gas. The insulated transmission rod, cooling piston rod, and piston linkage work together to complete the alternating thermodynamic cycle, allowing the piston linkage to rotate continuously, thereby continuously driving the cooling fan to push air into the bus duct housing. The fan drive utilizes the heat within the bus duct housing as its energy source, requiring no electrical connection or other energy sources. This eco-friendly and energy-saving feature allows it to operate even during power outages. Furthermore, the higher the temperature within the bus duct housing, the greater the power of the fan drive, the greater the flow rate of the cooling airflow, and the higher the cooling efficiency. The cooling efficiency is automatically adjusted based on the heat generated within the bus duct housing. The heat conduction port that provides heat to the fan drive device is opened at the second end of the bus duct shell. After the heat dissipation airflow enters the bus duct shell from the air inlet located at the first end of the bus duct shell, it flows through the entire bus duct shell and reaches the heat conduction port, bringing the heat from all parts of the wire group here. Therefore, the heat conduction port is relatively the position with the highest temperature, which can allow the fan drive device to obtain the most heat, so that it can operate at a higher power and ensure the heat dissipation effect of the bus duct.

[0008] In an optional embodiment, the bus duct also includes a fan flipping mechanism and a thermal transmission unlocking mechanism. The thermal transmission unlocking mechanism is connected to the cooling fan to be triggered to unlock the cooling fan when the external temperature is higher than a preset threshold. The fan flipping mechanism is connected to the cooling fan to drive the unlocked cooling fan to flip 180 degrees. After the cooling fan flips, the heating surface of the gas heating cylinder contacts the external air to receive heat from the external air to heat the gas. The cooling fan blows outward to prevent high-temperature gas from entering the bus duct shell.

[0009] In the event of a fire, the external temperature rises, and the bus duct is surrounded by hot gases. If the cooling fan is still blowing air into the bus duct housing, flames (hot gases) may enter the bus duct through the air inlet and burn it. The cooling fan is reversible, and a fan reversing mechanism is provided to drive its rotation. When the thermal transmission unlocking mechanism senses that the external temperature is higher than a preset threshold, indicating a fire, it triggers the unlocking of the cooling fan, causing it to flip 180 degrees and then lock again. The heating surface of the gas heating cylinder faces outward. The external heat causes the fan drive device to rotate the cooling fan, which blows air outward, preventing external hot gases from entering the bus duct housing through the air inlet.

[0010] In an optional embodiment, the bus duct also includes an outlet closing mechanism, which includes a closing cylinder and a wind shield, which is movably connected to the closing cylinder. When the temperature outside the closing cylinder changes, the gas in the closing cylinder expands due to heat or contracts due to cooling, causing the wind shield to extend or retract into the closing cylinder. When the temperature outside the closing cylinder is higher than a preset threshold, the wind shield is pushed to close the outlet to prevent high-temperature gas from entering the bus duct shell.

[0011] In the event of a fire, the bus duct is surrounded by high-temperature gas, and the sealed gas in the closed cylinder expands due to the heat, pushing the wind shield toward the outlet until the outlet is completely closed. The higher the outside air temperature, the greater the thrust of the gas on the wind shield, and the tighter it closes to the outlet, preventing high-temperature gas from entering the bus duct shell from the outlet. In some usage scenarios, the cooling fan flips to blow air outward, that is, in the event of a fire, the first end of the bus duct shell pushes the air outward, and the second end closes the vent, preventing flames from entering the bus duct shell from the first end or the second end, thereby protecting the wire array in the bus duct.

[0012] In an optional embodiment, the fan flip mechanism includes a flip torsion spring, which is drivingly connected to the heat dissipation fan to drive the heat dissipation fan to flip.

[0013] After the cooling fan is unlocked, the flipping action of the cooling fan is not restricted, and the flipping torsion spring can release energy to drive the cooling fan to flip, and the flipped cooling fan blows air outwards.

[0014] In an optional embodiment, the fan flipping mechanism includes a torsion spring energy storage rack, a one-way bearing and an energy storage gear. The heat dissipation fan includes a rotating shaft. The energy storage gear is engaged with the torsion spring energy storage rack. The energy storage gear is connected to the rotating shaft through a one-way bearing. When the rotating shaft is driven to rotate by the flipping torsion spring, the energy storage gear drives the torsion spring energy storage rack through the one-way bearing to extend out of the busbar trough housing.

[0015] After the cooling fan is flipped over, the torsion spring energy storage rack extends out of the bus duct housing. The maintenance worker can quickly identify the bus duct that has been burned during the fire based on the situation of the torsion spring energy storage rack extending out of the bus duct housing, and then inspect these bus ducts. After the maintenance is completed, the torsion spring energy storage rack is pushed to reset. Since the one-way bearing transmits in one direction, the torsion spring energy storage rack is pushed, and the rotating shaft will not rotate with it, thereby preventing the cooling fan from being flipped over when the external temperature does not change. At the same time, the flipping torsion spring is twisted by force and stores energy again, and reset to the preset state, so that the damaged bus duct can be repaired.

[0016] In an optional embodiment, the thermal transmission unlocking mechanism includes a gas sealing cylinder and a fixed pin, the heat dissipation fan includes a rotating chuck, and the fixed pin is movably connected to the gas sealing cylinder. When the temperature outside the gas sealing cylinder changes, the gas in the gas sealing cylinder expands due to heat or contracts due to cooling, causing the fixed pin to extend or retract into the gas sealing cylinder. The fixed pin is arranged in conjunction with the rotating chuck to unlock or limit the rotation of the rotating chuck. When the external temperature is higher than a preset threshold, the fixed pin is triggered to unlock the rotating chuck so that the heat dissipation fan can be flipped.

[0017] When a fire occurs, the temperature of the bus duct rises, the sealed gas in the gas sealing cylinder expands due to the heat, and the fixed pin moves up or down relative to the rotating chuck, unlocking the rotating chuck so that the rotating chuck can rotate, thereby causing the cooling fan to flip.

[0018] In an optional embodiment, the rotating chuck is provided with a one-way stop lock pin and a fixed block, and the one-way stop lock pin and the fixed block are arranged correspondingly to form a locking bayonet that can only be engaged in one direction. The locking bayonet moves in a circular motion with the rotating chuck, and the fixed pin is provided with an upper block and a lower block, and the upper block and the lower block are symmetrically arranged on both sides of the rotating chuck to alternately engage with the locking bayonet to limit the rotating chuck to rotate 180 degrees at a time.

[0019] In other words, the upper and lower clamping blocks can be alternately engaged in the locking notches, thereby limiting the rotation of the rotary chuck to only 180 degrees at a time, allowing the cooling fan to flip 180 degrees, just changing the flow direction of the cooling airflow. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] Figure 1 A schematic diagram of the three-dimensional structure of a bus duct according to an embodiment of the present application;

[0021] Figure 2 This is a schematic diagram of the exploded structure of the bus duct according to an embodiment of the present application;

[0022] Figure 3 This is a schematic diagram of the exploded structure of the bus duct in another perspective of an embodiment of the present application;

[0023] Figure 4 This is a schematic cross-sectional view of a bus duct according to an embodiment of the present application;

[0024] Figure 5 A schematic diagram of the three-dimensional structure of a heat dissipation fan according to an embodiment of the present application;

[0025] Figure 6 This is a schematic cross-sectional view of the heat dissipation fan according to an embodiment of the present application;

[0026] Figure 7 This is a schematic diagram of the three-dimensional structure of the fan flip mechanism, thermal transmission unlocking mechanism and heat dissipation fan in accordance with an embodiment of the present application;

[0027] Figure 8 Schematic diagram of the three-dimensional structure of the rotary chuck according to an embodiment of the present application.

[0028] Description of reference numerals:

[0029] Bus duct housing 1, air inlet 11, air outlet 12, heat conduction port 13;

[0030] Wire group 2;

[0031] Air guide channel 3, air guide inlet 31, air guide outlet 32;

[0032] Cooling fan 4, cooling fan 41, fan driving device 42, gas heating cylinder 421, gas cooling cylinder 422, heat-insulating transmission rod 423, cooling piston rod 424, piston linkage mechanism 425, heat-insulating disc 426, rotating chuck 43, rotating shaft 44;

[0033] Fan flip mechanism 5, flip torsion spring 51, torsion spring energy storage rack 52, one-way bearing 53, energy storage gear 54;

[0034] Thermal transmission unlocking mechanism 6, gas sealing cylinder 61, fixed latch 62, upper clamping block 621, lower clamping block 622;

[0035] Outlet sealing mechanism 7, sealing cylinder 71, wind shield 72. DETAILED DESCRIPTION

[0036] The present invention is described in detail below with reference to specific embodiments.

[0037] like Figure 1-4 As shown, the embodiment of the present application provides a heat-dissipating and fire-proof bus duct, including a bus duct housing 1 and a wire group 2. The wire group 2 is arranged in the bus duct housing 1. The bus duct also includes an air guide channel 3 and a heat dissipation fan 4. The bus duct housing 1 is provided with an air inlet 11 at the first end and an air outlet 12 at the second end. The air guide channel 3 is provided with an air guide inlet 31 and an air guide outlet 32. The air guide outlet 32 ​​is connected to the air inlet 11. The heat dissipation fan 4 generates a heat dissipation airflow and introduces it into the air guide inlet 31. The heat dissipation airflow flows through the air guide channel 3 from the air inlet 11 into the bus duct housing 1, flows through the bus duct housing 1 and flows out from the air outlet 12 to take away the heat generated at various places of the wire group 2. Figure 4 As shown, the air inlet 11 and the air outlet 12 are respectively located at both ends of the conductor group 2. After the heat dissipation airflow enters from the air inlet 11, it can pass through both ends of the busbar housing 1. In other words, the heat dissipation airflow flows through all parts of the conductor group 2, taking away the heat from all parts of the conductor group 2, and dissipating the heat more evenly. Figure 2 and Figure 4 As shown, the heat dissipation fan 4 is installed at the second end of the busbar trunking housing 1. The air inlet 31 of the air guide channel 3 is provided with multiple vents. These vents are arranged around the heat dissipation fan 4. Air enters the air guide channel 3 through the multiple vents and then enters the busbar trunking housing 1 through the air inlet 11. The air guide channel 3 can be made of a thermal insulation board material. The air in the air guide channel 3 is thermally insulated from the conductor array 2. The air in the air guide channel 3 enters the busbar trunking housing 1 through the air inlet 11 before coming into contact with the conductor array 2, removing heat from the conductor array 2.

[0038] like Figure 4 and Figure 6The heat dissipation fan 421 of the embodiment of the present application includes a heat dissipation fan 41 and a fan driving device 42. The fan driving device 42 is arranged above the heat dissipation fan 41. The fan driving device 42 includes a gas heating cylinder 421, a gas cooling cylinder 422, an insulating transmission rod 423, a cooling piston rod 424 and a piston linkage mechanism 425. The insulating transmission rod 423 is movably connected to the gas heating cylinder 421 and can reciprocate relative to the gas heating cylinder 421. The cooling piston rod 424 is movably connected to the gas cooling cylinder 422 and can reciprocate relative to the gas cooling cylinder 422. The insulating transmission rod 423 is provided with an insulating disc 426. There is a gap between the edge of the insulating disc 426 and the inner wall of the gas heating cylinder 421 so that air can flow back and forth on both sides of the insulating disc 426. The gas heating cylinder 421 and the gas cooling cylinder 422 are connected so that air can circulate alternately between the gas heating cylinder 421 and the gas cooling cylinder 422. The second end of the bus duct shell 1 is provided with a heat conducting disc 426. The heat conduction port 13 allows the gas heating cylinder 421 to indirectly contact the wire array 2. The heating surface of the gas heating cylinder 421 is located at the heat conduction port 13 to receive heat from the busbar duct shell 1 to heat the gas. The gas in the gas heating cylinder 421 expands due to the heat and flows into the gas cooling cylinder 422 through the gap between the heat insulation disc 426 and the gas heating cylinder 421 to push the cooling piston rod 424 to move in the gas cooling cylinder 422. The cooling piston rod 424 is connected to the heat insulation transmission rod 423 through the piston linkage mechanism 425 to push the heat insulation transmission rod 423 to move in the gas heating cylinder 421. The piston linkage mechanism 425 and the cooling fan 41 are each provided with a disc gear. The piston linkage mechanism 425 and the cooling fan 41 are connected through their respective disc gears. The heat insulation transmission rod 423 and the cooling piston rod 424 are alternately driven to drive the piston linkage mechanism 425 to rotate. The piston linkage mechanism 425 drives the cooling fan 41 to rotate to generate a cooling airflow.

[0039] The heat-insulating transmission rod 423 and the cooling piston rod 424 respectively move in different cylinders. The two cylinders are interconnected, and a thermodynamic cycle is achieved based on the expansion and compression of the gas. The heat-insulating transmission rod 423, the cooling piston rod 424, and the piston linkage mechanism 425 work together to complete the alternating action of the thermodynamic cycle, allowing the piston linkage mechanism 425 to rotate continuously, thereby continuously driving the cooling fan 41 to rotate, thereby pushing air into the bus duct housing 1. The fan drive device 42 uses the heat within the bus duct housing 1 as an energy source, does not require plugging in or providing other energy sources, is green and energy-saving, and can also operate during power outages. On the other hand, the higher the temperature within the bus duct housing 1, the greater the power of the fan drive device 42, the greater the flow rate of the cooling airflow, and the higher the heat dissipation efficiency. The heat dissipation efficiency can be automatically adjusted according to the heat generated within the bus duct housing 1. The heat conduction port 13 that provides heat to the fan drive device 42 is opened at the second end of the bus duct shell 1. After the heat dissipation airflow enters the bus duct shell 1 from the air inlet 11 located at the first end of the bus duct shell 1, it flows through the entire bus duct shell 1 and reaches the heat conduction port 13, bringing the heat from all parts of the wire array 2 here. Therefore, the heat conduction port 13 is relatively the position with the highest temperature, which allows the fan drive device 42 to obtain the most heat, so that it can operate at a higher power and ensure the heat dissipation effect of the bus duct.

[0040] To prevent flames (high temperature gas) from entering the bus duct housing when a fire occurs, Figure 5 、 Figure 6 and Figure 7 As shown, the bus duct also includes a fan flipping mechanism 5 and a thermal transmission unlocking mechanism 6. The thermal transmission unlocking mechanism 6 is connected to the heat dissipation fan 4 so as to be triggered to unlock the heat dissipation fan 4 when the external temperature is higher than a preset threshold value. The fan flipping mechanism 5 is connected to the heat dissipation fan 4 to drive the unlocked heat dissipation fan 4 to flip 180 degrees. After the heat dissipation fan 4 flips, the heating surface of the gas heating cylinder 421 contacts the external air to receive the heat from the external air to heat the gas. The heat dissipation fan 41 blows air outward to prevent high-temperature gas from entering the bus duct shell 1.

[0041] In the event of a fire, the external temperature rises and the bus duct is surrounded by high-temperature gases. If the cooling fan 4 is still blowing air into the bus duct housing 1 at this time, flames (high-temperature gases) may enter the bus duct through the air inlet 11 and burn the bus duct. The cooling fan 4 is reversible and is provided with a fan reversing mechanism 5 to drive its reversal. When the thermal transmission unlocking mechanism 6 senses that the external temperature is higher than a preset threshold, indicating that a fire has occurred, it triggers the unlocking of the cooling fan 4, allowing the cooling fan 4 to flip 180 degrees and then be locked. The heating surface of the gas heating cylinder 421 faces outward. The external heat will cause the fan drive device 42 to drive the cooling fan 41 to rotate, and the cooling fan 41 will blow air outward to prevent the external high-temperature gas from entering the bus duct housing 1 through the air inlet 11.

[0042] like Figure 6 and Figure 7 As shown, the fan flip mechanism 5 includes a flip torsion spring 51, which is in transmission connection with the heat dissipation fan 4 to drive the heat dissipation fan 4 to flip. After the heat dissipation fan 4 is unlocked, the flipping action of the heat dissipation fan 4 is not restricted, and the flip torsion spring 51 is able to release energy, driving the heat dissipation fan 4 to flip, and the flipped heat dissipation fan 4 blows air outward. Figure 6 As shown, the fan flip mechanism 5 also includes a torsion spring energy storage rack 52, a one-way bearing 53 and an energy storage gear 54. The heat dissipation fan 4 includes a rotating shaft 44. The end of the rotating shaft 44 is connected to the flip torsion spring 51. One end of the flip torsion spring 51 is connected to the shell, and the other end of the flip torsion spring 51 is connected to the energy storage gear 54. When the flip torsion spring 51 releases energy, it can drive the energy storage gear 54 to rotate. The energy storage gear 54 is engaged with the torsion spring energy storage rack 52. The energy storage gear 54 is connected to the rotating shaft 44 through the one-way bearing 53. When the rotating shaft 44 is driven to rotate by the flip torsion spring 51, the energy storage gear 54 is transmitted through the one-way bearing 53 to drive the torsion spring energy storage rack 52 to extend out of the bus duct shell 1. After the cooling fan 4 is flipped, the torsion spring energy storage rack 52 extends out of the bus duct housing 1. The maintenance worker can quickly identify the bus duct that has been burned during the fire based on the situation of the torsion spring energy storage rack 52 extending out of the bus duct housing 1, and thus inspect these bus ducts. After the maintenance is completed, the torsion spring energy storage rack 52 is pushed to reset. Since the one-way bearing 53 is transmitted in one direction, the torsion spring energy storage rack 52 is pushed, and the rotating shaft 44 will not rotate with it, thereby preventing the cooling fan 4 from being flipped when the external temperature does not change. At the same time, the flipping torsion spring 51 is twisted by force and stores energy again, and resets to the preset state, so that the damaged bus duct can be repaired.

[0043] like Figure 6 and Figure 7 As shown, the thermal transmission unlocking mechanism 6 includes a gas sealing cylinder 61 and a fixed latch 62, and the heat dissipation fan 4 includes a rotating chuck 43. The fixed latch 62 is movably connected to the gas sealing cylinder 61. When the temperature outside the gas sealing cylinder 61 changes, the gas in the gas sealing cylinder 61 expands due to heat or contracts due to cooling, causing the fixed latch 62 to extend or retract into the gas sealing cylinder 61. The fixed latch 62 is arranged in conjunction with the rotating chuck 43 to unlock or limit the rotation of the rotating chuck 43. An elastic spring can be arranged in the gas sealing cylinder 61. When a certain external force is applied, the elastic spring is compressed. When the external temperature is higher than a preset threshold, the fixed latch can be pushed, that is, the fixed latch 62 is triggered to unlock the rotating chuck 43, so that the heat dissipation fan 4 can be flipped. Specifically, as Figure 7 and Figure 8As shown, the rotating chuck 43 is provided with a one-way stop lock pin and a fixed block, and the one-way stop lock pin and the fixed block are correspondingly arranged to form a locking bayonet that can only be engaged in one direction. The locking bayonet moves in a circle with the rotating chuck 43, and the fixed bayonet 62 is provided with an upper block 621 and a lower block 622. The upper block 621 and the lower block 622 are symmetrically arranged on both sides of the rotating chuck 43 to alternately engage with the locking bayonet to limit the rotating chuck 43 to rotate 180 degrees at a time.

[0044] In the event of a fire, the temperature of the bus duct rises, the sealed gas in the gas sealing cylinder 61 expands due to the heat, and the fixed pin 62 moves up or down relative to the rotating chuck 43, unlocking the rotating chuck 43 so that the rotating chuck 43 can rotate, thereby causing the heat dissipation fan 4 to flip over. That is, the upper block 621 and the lower block 622 are set on both sides of the rotating chuck 43, and the locking bayonet of the rotating chuck 43 is not fixed in one position, but rotates with the rotating chuck 43. After the upper block 621 is disengaged from the locking bayonet of the rotating chuck 43, the rotating chuck 43 rotates immediately, and the locking bayonet of the rotating chuck 43 also performs a circular motion with the rotating chuck 43. When the locking bayonet of the rotating chuck 43 rotates to the position of the lower block 622, due to the action of the one-way stop pin, the lower block 622 can easily pass through the one-way stop pin and be restricted in one direction. Between the stop lock pin and the fixed block, that is, the lower clamping block 622 is clamped into the locking clamping groove of the rotating chuck 43 to lock the rotating chuck 43. Similarly, after the lower clamping block 622 is disengaged from the locking clamping groove of the rotating chuck 43, the rotating chuck 43 immediately rotates 180 degrees, and the upper clamping block 621 is clamped into the locking clamping groove of the rotating chuck 43. In other words, the upper clamping block 621 and the lower clamping block 622 can be alternately clamped into the locking clamping groove, thereby limiting the rotating chuck 43 to only rotate 180 degrees at a time, allowing the cooling fan 41 to flip 180 degrees, just changing the flow direction of the cooling airflow.

[0045] When a fire occurs, the cooling fan 41 turns over to blow air outwards to prevent the flame from entering the bus duct housing 1 through the air inlet 11. Figure 1 and 2As shown, the embodiment of the present application further provides an outlet sealing mechanism 7 at the air outlet 12, and the outlet sealing mechanism 7 includes a sealing cylinder 71 and a wind shield 72, and the wind shield 72 is movably connected to the sealing cylinder 71. When the temperature outside the sealing cylinder 71 changes, the gas in the sealing cylinder 71 expands due to heat or contracts due to cooling, causing the wind shield 72 to extend or retract into the sealing cylinder 71. When the temperature outside the sealing cylinder 71 is higher than a preset threshold, the wind shield 72 is pushed to close the air outlet 12 to prevent high-temperature gas from entering the bus duct shell 1. In the event of a fire, the bus duct is surrounded by high-temperature gas, and the sealed gas in the closed cylinder 71 expands due to the heat, pushing the wind shield 72 toward the air outlet 12 until the air outlet 12 is completely closed. The higher the external air temperature, the greater the thrust of the gas on the wind shield 72, and the tighter it is closed to the air outlet 12, preventing high-temperature gas from entering the bus duct shell 1 from the air outlet 12. In some usage scenarios, the cooling fan 41 flips over to blow air outward, that is, in the event of a fire, the first end of the bus duct shell 1 pushes the air outward, and the second end closes the air vent, so that the flame cannot enter the bus duct shell 1 from the first end or the second end, thereby protecting the wire group 2 in the bus duct.

[0046] It should be noted that the bus duct in this embodiment is limited to voltage levels of 1000V and below, and current levels of 100-6300A.

[0047] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the present invention, rather than to limit the scope of protection of the present invention. Although the present invention has been described in detail with reference to the preferred embodiments, those skilled in the art should understand that the technical solutions of the present invention may be modified or replaced by equivalents without departing from the essence and scope of the technical solutions of the present invention.

Claims

1. A heat dissipation and fire prevention bus duct, comprising a bus duct housing and a conductor group, wherein the conductor group is arranged in the bus duct housing, characterized in that: The bus duct housing further includes an air guide channel and a heat dissipation fan. The first end of the bus duct housing is provided with an air inlet, and the second end is provided with an air outlet. The air guide channel is provided with an air guide inlet and an air guide outlet. The air guide outlet is connected to the air inlet. The heat dissipation fan generates a heat dissipation airflow and introduces it into the air guide inlet. The heat dissipation airflow flows through the air guide channel from the air inlet into the bus duct housing, flows through the bus duct housing and flows out from the air outlet to remove the heat generated at various locations of the conductor array. The heat dissipation fan includes a heat dissipation fan and a fan driving device. The fan driving device includes a gas heating cylinder, a gas cooling cylinder, a heat-insulating transmission rod, a cooling piston rod and a piston linkage mechanism. The heat-insulating transmission rod is movably connected to the gas heating cylinder and can reciprocate relative to the gas heating cylinder. The cooling piston rod is movably connected to the gas cooling cylinder and can reciprocate relative to the gas cooling cylinder. The heat-insulating transmission rod is provided with a heat-insulating disc. There is a gap between the edge of the heat-insulating disc and the inner wall of the gas heating cylinder so that air can flow back and forth on both sides of the heat-insulating disc. The gas heating cylinder and the gas cooling cylinder are connected so that air can circulate alternately between the gas heating cylinder and the gas cooling cylinder. The bus A heat conduction port is provided at the second end of the busbar trough shell, and the heating surface of the gas heating cylinder is located at the heat conduction port to receive heat from the busbar trough shell to heat the gas. The gas in the gas heating cylinder expands due to the heat and flows into the gas cooling cylinder through the gap between the heat-insulating disc and the gas heating cylinder to push the cooling piston rod to move in the gas cooling cylinder. The cooling piston rod is connected to the heat-insulating transmission rod through a piston linkage mechanism to push the heat-insulating transmission rod to move in the gas heating cylinder. The piston linkage mechanism is connected to the cooling fan. The heat-insulating transmission rod and the cooling piston rod are alternately driven to drive the piston linkage mechanism to rotate. The piston linkage mechanism drives the cooling fan to rotate to generate a cooling airflow.

2. The bus duct according to claim 1, characterized in that: It also includes a fan flipping mechanism and a thermal transmission unlocking mechanism. The thermal transmission unlocking mechanism is connected to the cooling fan to be triggered to unlock the cooling fan when the external temperature is higher than a preset threshold. The fan flipping mechanism is connected to the cooling fan to drive the unlocked cooling fan to flip 180 degrees. After the cooling fan flips, the heating surface of the gas heating cylinder contacts the external air to receive heat from the external air to heat the gas. The cooling fan blows air outward to prevent high-temperature gas from entering the bus duct shell.

3. The bus duct according to claim 2, characterized in that: It also includes an outlet sealing mechanism, which includes a closed cylinder and a windshield. The windshield is movably connected to the closed cylinder. When the temperature outside the closed cylinder changes, the gas in the closed cylinder expands due to heat or contracts due to cooling, causing the windshield to extend or retract into the closed cylinder. When the temperature outside the closed cylinder is higher than a preset threshold, the windshield is pushed to close the outlet to prevent high-temperature gas from entering the bus duct shell.

4. The bus duct according to claim 2, characterized in that: The fan flipping mechanism includes a flipping torsion spring, which is transmission-connected to the heat dissipation fan to drive the heat dissipation fan to flip.

5. The bus duct according to claim 4, characterized in that: The fan flipping mechanism includes a torsion spring energy storage rack, a one-way bearing and an energy storage gear. The heat dissipation fan includes a rotating shaft. The energy storage gear is engaged with the torsion spring energy storage rack. The energy storage gear is connected to the rotating shaft through a one-way bearing. When the rotating shaft is driven to rotate by the flipping torsion spring, the energy storage gear drives the torsion spring energy storage rack through the one-way bearing to extend out of the busbar trough housing.

6. The bus duct according to claim 2, characterized in that: The thermal transmission unlocking mechanism includes a gas sealing cylinder and a fixed pin. The heat dissipation fan includes a rotating chuck. The fixed pin is movably connected to the gas sealing cylinder. When the temperature outside the gas sealing cylinder changes, the gas inside the gas sealing cylinder expands due to heat or contracts due to cooling, causing the fixed pin to extend or retract into the gas sealing cylinder. The fixed pin and the rotating chuck are cooperated to unlock or limit the rotation of the rotating chuck. When the external temperature is higher than a preset threshold, the fixed pin is triggered to unlock the rotating chuck so that the heat dissipation fan can be flipped.

7. The bus duct according to claim 6, characterized in that: The rotating chuck is provided with a one-way stop lock pin and a fixed block. The one-way stop lock pin and the fixed block are arranged correspondingly to form a locking bayonet that can only be engaged in one direction. The locking bayonet moves in a circular motion with the rotating chuck. The fixed bayonet is provided with an upper clamping block and a lower clamping block. The upper clamping block and the lower clamping block are symmetrically arranged on both sides of the rotating chuck to alternately engage with the locking bayonet to limit the rotating chuck to a single rotation of 180 degrees.

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