Electrical control cabinet for rail transit

Abstract

The invention relates to the technical field of electrical control cabinets, in particular to an electrical control cabinet for rail transit. According to the electrical control cabinet for rail transit, the air pressure in the cabinet body can be adjusted, the influence of the external air pressure on the sealing ring is reduced, and the sealing performance of the cabinet body is ensured. An electrical control cabinet for rail transit comprises a cabinet body, a limiting frame, a cabinet door, a sealing ring and the like, the limiting frame is connected to the front side of the cabinet body, the cabinet door is rotatably connected to the front side of the left portion of the cabinet body, and the sealing ring is connected to the cabinet door. When a subway train runs at a high speed in a tunnel to cause air pressure change, the pressure regulating film on the mounting frame expands or contracts along with the air pressure change to drive the fixing frame to move up and down, so that the damping piston slides on the damping sleeve, the first spring is squeezed to contract and then rebounds, and the deformation speed of the pressure regulating film is reduced; the effects that the air pressure in the cabinet body can be adjusted, the influence of the external air pressure on the sealing ring is reduced, and the sealing performance of the cabinet body is ensured are achieved.

Description

Technical Field

[0001] The present invention relates to the technical field of electric control cabinets, and in particular to an electric control cabinet for rail transportation. Background Art

[0002] Rail transit electrical control cabinets refer to closed metal boxes installed in rail vehicles or facilities along the line (such as stations, subway tunnels, etc.), which are equipped with various electrical and electronic components and are responsible for centralized management and monitoring of traction power supply, signal control, communication network and other functions. Existing electrical control cabinets are usually sealed with sealing components to prevent the entry of water vapor, dust, etc. when used in subway tunnels. However, since subway trains will cause air pressure changes when running at high speed in tunnels, frequent air pressure changes will cause the sealing components to be subjected to alternating pressure, accelerate the aging and deformation of the sealing components, damage the seal, and cause dust and water vapor to enter, which will lead to short circuits and corrosion.

[0003] Therefore, an electrical control cabinet for rail transit has been developed that can adjust the air pressure in the cabinet, reduce the impact of external air pressure on the sealing ring, and ensure the sealing performance of the cabinet. Summary of the invention

[0004] In order to overcome the problem that the air pressure changes caused by subway trains running at high speed in tunnels, frequent air pressure changes will cause the sealing components in the electrical control cabinet to be subjected to alternating pressure, accelerate the aging and deformation of the sealing components, damage the seal, and cause dust and water vapor to enter, thereby causing short circuits and corrosion. The present invention provides an electrical control cabinet for rail transit that can adjust the air pressure in the cabinet, reduce the influence of external air pressure on the sealing ring, and ensure the sealing performance of the cabinet.

[0005] The technical solution is: an electrical control cabinet for rail transit, including a cabinet body, a limit frame, a cabinet door, a sealing ring and a voltage regulating mechanism. The front side of the cabinet body is connected to the limit frame, the front left side of the cabinet body is rotatably connected to the cabinet door, the cabinet door is connected to the sealing ring, and the cabinet body is provided with a pressure regulating mechanism that can adjust the internal air pressure.

[0006] Furthermore, the cabinet is made of stainless steel.

[0007] Furthermore, the pressure regulating mechanism includes an installation frame, a pressure regulating membrane, a fixing frame, a damping sleeve, a first spring and a damping piston. The installation frame is connected to the upper side of the cabinet, the pressure regulating membrane is connected to the installation frame, the upper middle part of the pressure regulating membrane is connected to left and right fixing frames, the upper left and right sides of the cabinet are connected to damping sleeves, the damping sleeves are slidably connected to damping pistons, the damping pistons are connected to the connected damping sleeves with first springs, the damping pistons are connected to adjacent fixing frames, the pressure regulating membrane on the installation frame expands or contracts with the change of air pressure, driving the fixing frame to move up and down, so that the damping piston slides on the damping sleeve, the first spring is squeezed, contracts and then rebounds, thereby slowing down the deformation speed of the pressure regulating membrane.

[0008] Furthermore, it also includes a heat exchange mechanism, which includes heat pipes, cooling fins, a purification box and cold pipes. A plurality of heat pipes are connected to the rear side of the upper part of the cabinet, a plurality of cooling fins are connected to the rear side of the cabinet, the heat pipes are all connected to the cooling fins, a purification box is connected to the rear side of the lower part of the cabinet, the lower sides of the heat pipes are all connected to the purification box, a plurality of cold pipes are connected to the lower side of the purification box, and the cold pipes are all connected to the cabinet. When the internal temperature of the cabinet rises during operation, hot air enters the heat pipes, and the heat dissipation is accelerated through the cooling fins. The cooled air flows back to the cabinet from the purification box and the cold pipes. When a train passes by, the air circulation in the tunnel is accelerated, thereby accelerating the heat dissipation efficiency of the cooling fins.

[0009] Furthermore, it also includes a guide mechanism, which includes a docking plate, a valve body, a fixing plate, a second spring and a valve plate. The docking plate is connected to the lower side of the installation frame, the valve body is connected to the middle and rear of the docking plate, the second heat pipe from right to left is connected to the docking plate, the valve body is connected to the fixing plate, the fixing plate is connected to the valve plate through the second spring, and the valve plates are slidingly connected to adjacent valve bodies. When the air pressure inside the cabinet increases, the airflow pushes the valve plate to move closer to the fixing plate, the second spring is squeezed and contracted, causing the valve body to open, and then the airflow enters the docking plate, and then enters the heat pipe from the docking plate to dissipate heat. When the air pressure inside the cabinet decreases, the gas in the docking plate enters the heat pipe from the valve body at the rear.

[0010] Furthermore, it also includes a dust removal mechanism, which includes a fixed seat, a twisted shaft, a dust removal frame, a ratchet, a connecting frame, ratchet teeth and a third spring. The upper rear side of the cabinet is connected to left and right fixed seats, the fixed seats are rotatably connected with the twisted shaft, the dust removal frame is threadedly connected to the twisted shaft, ratchets are connected to the left and right sides of the twisted shaft, the fixed frames are connected to the connecting frames, the rear sides of the connecting frames are slidably connected with ratchets, the ratchets are meshed with adjacent ratchets, and the upper and lower parts of the ratchets are connected to the connecting frames connected thereto. The third spring is connected between the upper and lower parts of the ratchets and the connected connecting frames, and the fixed frame moves, driving the connecting frame to move. When the connecting frame moves upward, the ratchet teeth are meshed with the ratchet wheels through the action of the third spring, so that the twisted shaft rotates, and then the dust removal frame moves to remove dust from the heat sink fins.

[0011] Furthermore, a cleaning sheet is provided on the dust removal frame.

[0012] Furthermore, a guide groove is provided on the rear side of the upper portion of the cabinet, and the dust removal frame passes through the guide groove.

[0013] Furthermore, it also includes a purification mechanism, which includes an installation box, a dehumidification pad and an electrostatic rod. The installation box is clamped in the middle of the purification box, the dehumidification pad is placed on the lower side of the installation box, and a plurality of electrostatic rods are connected to the upper part of the installation box. After the air enters the purification box, the dehumidification pad absorbs moisture in the air, and the electrostatic rods adsorb dust in the air.

[0014] Furthermore, it also includes a convection mechanism, which includes a partition plate and a fan. The lower part of the cabinet is connected to the partition plate, and the middle part of the partition plate is connected to the fan. When the fan is started, the air inside the cabinet circulates through the partition plate.

[0015] The beneficial effects are: 1. According to the present invention, when the air pressure changes due to the high-speed running of a subway train in a tunnel, the pressure-regulating membrane on the mounting frame expands or contracts with the change in air pressure, driving the fixing frame to move up and down, so that the damping piston slides on the damping sleeve, and the first spring is squeezed, contracts, and then rebounds, thereby slowing down the deformation speed of the pressure-regulating membrane, thereby achieving the effect of being able to regulate the air pressure in the cabinet, reducing the influence of the external air pressure on the sealing ring, and ensuring the sealing performance of the cabinet.

[0016] 2. In the present invention, when the internal temperature of the cabinet increases during operation, hot air enters the heat pipe, and the heat dissipation is accelerated through the heat dissipation fins. The cooled air flows back to the cabinet from the purification box and the cold pipe. When the train passes, the air circulation in the tunnel is accelerated, thereby accelerating the heat dissipation efficiency of the heat dissipation fins, thereby achieving the effect of accelerating the heat dissipation efficiency inside the cabinet and avoiding affecting the normal operation of the cabinet.

[0017] 3. In the present invention, when the air pressure inside the cabinet increases, the airflow pushes the valve plate to move closer to the fixed plate, and the second spring is squeezed and contracted, causing the valve body to open, thereby allowing the airflow to enter the docking plate, and then enter the heat pipe from the docking plate to dissipate heat, thereby achieving the effect of buffering and dissipating the airflow and reducing air pressure fluctuations.

[0018] 4. When the connecting frame of the present invention moves upward, the ratchet and the ratchet wheel are meshed by the force of the third spring, so that the twist shaft rotates, and then the dust removal frame moves along the guide groove to remove dust from the heat sink fins, thereby achieving the effect of automatically removing dust from the heat sink fins and preventing dust from affecting the heat dissipation efficiency of the heat sink fins.

[0019] 5. In the present invention, after the air enters the purification box, the dehumidification pad absorbs moisture in the air, and the electrostatic rod absorbs dust in the air, thereby achieving the effect of purifying the air in the cabinet and avoiding affecting the operation of internal electrical appliances.

[0020] 6. When the temperature inside the cabinet is high, the present invention starts the fan to circulate the air inside the cabinet through the partition plate, thereby achieving the effect of accelerating the air circulation inside the cabinet and improving the heat dissipation efficiency. BRIEF DESCRIPTION OF THE DRAWINGS

[0021] Figure 1 It is a schematic diagram of the three-dimensional structure of the present invention.

[0022] Figure 2 It is a three-dimensional structural cross-sectional view of the present invention.

[0023] Figure 3 It is a partial three-dimensional structural schematic diagram of the present invention.

[0024] Figure 4 It is a three-dimensional structural cross-sectional view of the pressure regulating mechanism of the present invention.

[0025] Figure 5 It is a structural cross-sectional view of the pressure regulating mechanism of the present invention.

[0026] Figure 6 It is a partial three-dimensional structural cross-sectional view of the pressure regulating mechanism of the present invention.

[0027] Figure 7 It is a three-dimensional structural cross-sectional view of the heat exchange mechanism of the present invention.

[0028] Figure 8 It is a structural schematic diagram of the flow guiding mechanism of the present invention.

[0029] Fig. 9 It is a three-dimensional structural cross-sectional view of the flow guiding mechanism of the present invention.

[0030] Fig.10 It is a partial three-dimensional structural cross-sectional view of the flow guiding mechanism of the present invention.

[0031] Fig.11 It is a schematic diagram of the three-dimensional structure of the dust removal mechanism of the present invention.

[0032] Fig.12 It is a schematic diagram of the three-dimensional structure of the dust removal mechanism of the present invention.

[0033] Fig.13 It is a three-dimensional structural cross-sectional view of the purification mechanism of the present invention.

[0034] Fig.14 It is a schematic diagram of the three-dimensional structure of the purification mechanism of the present invention.

[0035] Fig.15 It is a schematic diagram of the three-dimensional structure of the convection mechanism of the present invention.

[0036] Figure numbers: 1. cabinet body; 101. limit frame; 11. cabinet door; 12. sealing ring; 2. pressure regulating mechanism; 20. installation frame; 21. pressure regulating membrane; 22. fixing frame; 23. damping sleeve; 24. first spring; 25. damping piston; 3. heat exchange mechanism; 30. heat pipe; 31. heat dissipation fin; 32. purification box; 33. cold pipe; 4. flow guide mechanism; 40. docking plate; 41. valve body; 42. fixing plate; 43. second spring; 44. valve plate; 5. dust removal mechanism; 50. fixing seat; 51. twisted shaft; 52. dust removal frame; 53. ratchet; 54. connecting frame; 55. ratchet; 56. third spring; 6. purification mechanism; 60. installation box; 61. dehumidification pad; 62. electrostatic rod; 7. convection mechanism; 70. partition plate; 71. fan. DETAILED DESCRIPTION

[0037] The present invention will be described in detail below in conjunction with the accompanying drawings.

[0038] by Figure 1 The direction is determined by the standard, the side facing the viewer is the front side, the side facing away from the viewer is the back side, the left side of the viewer is the left side, and the right side of the viewer is the right side. Figure 1 direction as a reference.

[0039] An electrical control cabinet for rail transit, such as Figure 1-Figure 15 As shown, it includes a cabinet body 1, a limit frame 101, a cabinet door 11, a sealing ring 12 and a pressure regulating mechanism 2. The limit frame 101 is connected to the front side of the cabinet body 1. The cabinet body 1 is made of stainless steel and has good corrosion resistance. The cabinet door 11 is rotatably connected to the front left side of the cabinet body 1. The cabinet door 11 is connected to the sealing ring 12. The cabinet body 1 is provided with the pressure regulating mechanism 2.

[0040] like Figure 1 , Figure 2 , Figure 4 , Figure 5 and Figure 6 As shown, the pressure regulating mechanism 2 includes a mounting frame 20, a pressure regulating membrane 21, a fixing frame 22, a damping sleeve 23, a first spring 24 and a damping piston 25. The mounting frame 20 is connected to the upper side of the cabinet 1, the pressure regulating membrane 21 is connected to the mounting frame 20, the left and right fixing frames 22 are connected to the upper middle part of the pressure regulating membrane 21, the damping sleeves 23 are connected to the upper sides of the left and right parts of the cabinet 1, the damping pistons 25 are slidably connected to the damping sleeves 23, the first spring 24 is connected between the damping pistons 25 and the connected damping sleeves 23, and the damping pistons 25 are connected to the adjacent fixing frames 22.

[0041] When using the present invention, the cabinet body 1 is first installed at a designated position in a subway tunnel, and then the cabinet door 11 is rotated and closed, so that the sealing ring 12 is engaged with the limit frame 101 to seal the cabinet body 1. When the subway train travels at high speed in the tunnel and causes air pressure changes, the pressure regulating membrane 21 on the installation frame 20 expands or contracts with the air pressure change, driving the fixing frame 22 to move up and down, so that the damping piston 25 slides on the damping sleeve 23, and the first spring 24 is squeezed, contracts, and then rebounds, slowing down the deformation speed of the pressure regulating membrane 21, thereby adjusting the air pressure in the cabinet body 1, reducing the influence of external air pressure on the sealing ring 12, and ensuring the sealing performance of the cabinet body 1.

[0042] like Figure 2 and Figure 7 As shown, a heat exchange mechanism 3 is also included, and the heat exchange mechanism 3 includes a heat pipe 30, a heat dissipation fin 31, a purification box 32 and a cold pipe 33. Three of the heat pipes 30 are connected to the upper rear side of the cabinet 1, and ten of the heat dissipation fins 31 are connected to the rear side of the cabinet 1. The heat pipes 30 are all connected to the heat dissipation fins 31. The purification box 32 is connected to the lower rear side of the cabinet 1, and the lower side of the heat pipes 30 is connected to the purification box 32. The lower side of the purification box 32 is connected to three of the cold pipes 33, and the cold pipes 33 are all connected to the cabinet 1.

[0043] The heat exchange mechanism 3 of the device can be used to speed up the heat dissipation efficiency inside the cabinet 1. When the internal temperature of the cabinet 1 increases during operation, hot air enters the heat pipe 30, and the heat dissipation is accelerated through the heat dissipation fins 31. The cooled air flows back to the cabinet 1 from the purification box 32 and the cold pipe 33. When a train passes by, the air circulation in the tunnel is accelerated, thereby speeding up the heat dissipation efficiency of the heat dissipation fins 31, thereby speeding up the heat dissipation efficiency inside the cabinet 1 and avoiding affecting the normal operation of the cabinet 1.

[0044] like Figure 2 , Figure 8 , Fig. 9 and Fig.10 As shown, it also includes a guide mechanism 4, which includes a docking plate 40, a valve body 41, a fixing plate 42, a second spring 43 and a valve plate 44. The docking plate 40 is connected to the lower side of the installation frame 20, and the valve body 41 is connected to the middle and rear of the docking plate 40. The second heat pipe 30 from the right to the left is connected to the docking plate 40, and the valve body 41 is connected to the fixing plate 42. The fixing plate 42 is connected to the valve plate 44 through the second spring 43, and the valve plate 44 is slidably connected to the adjacent valve body 41.

[0045] The guide mechanism 4 of the device can be used to guide the airflow. When the air pressure inside the cabinet 1 increases, the airflow pushes the valve plate 44 on the middle valve body 41 to move close to the fixing plate 42, and the second spring 43 is squeezed and contracted, so that the middle valve body 41 opens, and the airflow enters the docking plate 40. Then the airflow pushes the valve plate 44 on the rear valve body 41 to move close to the fixing plate 42, so that the rear valve body 41 opens, and the airflow enters the heat pipe 30 from the docking plate 40 for heat dissipation, thereby buffering and dissipating the airflow and reducing air pressure fluctuations. After the air pressure stabilizes, the second spring 43 rebounds, driving the valve plate 44 to reset, so that the valve body 41 is closed.

[0046] like Figure 1 , Figure 2 , Fig.11 and Fig.12 As shown, it also includes a dust removal mechanism 5, which includes a fixed seat 50, a twisted shaft 51, a dust removal frame 52, a ratchet 53, a connecting frame 54, a ratchet 55 and a third spring 56. The upper rear side of the cabinet 1 is connected to the left and right fixed seats 50, the twisted shaft 51 is rotatably connected between the fixed seats 50, the dust removal frame 52 is threadedly connected to the twisted shaft 51, and a cleaning sheet is provided on the dust removal frame 52 for easy dust removal. A guide groove is opened on the upper rear side of the cabinet 1, and the dust removal frame 52 passes through the guide groove. The ratchet 53 is connected to the left and right sides of the twisted shaft 51, the connecting frame 54 is connected to the fixed frame 22, and the ratchet 55 is slidably connected to the rear side of the connecting frame 54, and the ratchet 55 is meshed with the adjacent ratchet 53. The third spring 56 is connected between the upper and lower parts of the ratchet 55 and the connected connecting frame 54.

[0047] The dust removal mechanism 5 of the present device can be used to remove dust from the heat dissipation fins 31. When the fixing frame 22 moves, the connecting frame 54 is driven to move. When the connecting frame 54 moves upward, the ratchet 55 is meshed with the ratchet wheel 53 through the force of the third spring 56, so that the twisted shaft 51 rotates, and then the dust removal frame 52 moves along the guide groove to remove dust from the heat dissipation fins 31, thereby automatically removing dust from the heat dissipation fins 31 and preventing dust from affecting the heat dissipation efficiency of the heat dissipation fins 31. When the connecting frame 54 moves downward, the ratchet wheel 53 squeezes the ratchet teeth 55 to move forward, and the third spring 56 is squeezed and contracted. At this time, the ratchet wheel 53 and the twisted shaft 51 do not rotate, so that the dust removal frame 52 can complete the dust removal of the entire heat dissipation fins 31.

[0048] like Figure 1 , Figure 2 , Fig.13 and Fig.14 As shown, a purification mechanism 6 is also included, and the purification mechanism 6 includes an installation box 60, a dehumidification pad 61 and an electrostatic rod 62. The installation box 60 is clamped in the middle of the purification box 32, the dehumidification pad 61 is placed on the lower side of the installation box 60, and three electrostatic rods 62 are connected to the upper part of the installation box 60.

[0049] By using the purification mechanism 6 of the present device, the air in the cabinet 1 can be purified. After the air enters the purification box 32, the dehumidification pad 61 absorbs moisture in the air, and the electrostatic rod 62 adsorbs dust in the air. Then, the air enters the cold pipe 33 through the installation box 60, thereby purifying the air in the cabinet 1 and avoiding affecting the operation of internal electrical appliances.

[0050] like Figure 2 and Fig.15 As shown, a convection mechanism 7 is also included. The convection mechanism 7 includes a partition plate 70 and a fan 71. The partition plate 70 is connected to the lower part of the cabinet 1, and the fan 71 is connected to the middle part of the partition plate 70.

[0051] The convection mechanism 7 of the device can speed up the air circulation inside the cabinet 1. When the temperature inside the cabinet 1 is high, the fan 71 is started to circulate the air inside the cabinet 1 through the partition plate 70, thereby speeding up the air circulation inside the cabinet 1 and improving the heat dissipation efficiency.

[0052] The above is only a specific embodiment of the present invention, but the protection scope of the present invention is not limited thereto. Any person skilled in the art can easily think of changes or substitutions within the technical scope disclosed by the present invention, which should be included in the protection scope of the present invention. Therefore, the protection scope of the present invention should be based on the protection scope of the claims.

Claims

1. An electrical control cabinet for rail transit, characterized in that: The cabinet comprises a cabinet body (1), a limit frame (101), a cabinet door (11), a sealing ring (12) and a pressure regulating mechanism (2); the cabinet body (1) is connected to the limit frame (101) at the front side; the cabinet door (11) is rotatably connected to the left front side of the cabinet body (1); the cabinet door (11) is connected to the sealing ring (12); and the cabinet body (1) is provided with a pressure regulating mechanism (2) capable of regulating internal air pressure; The pressure regulating mechanism (2) comprises a mounting frame (20), a pressure regulating membrane (21), a fixing frame (22), a damping sleeve (23), a first spring (24) and a damping piston (25); the mounting frame (20) is connected to the upper side of the cabinet (1); the mounting frame (20) is connected to the pressure regulating membrane (21); the upper side of the middle of the pressure regulating membrane (21) is connected to two left and right fixing frames (22); the upper sides of the left and right parts of the cabinet (1) are both connected to the damping sleeve (23); and the damping sleeve (23) is slidably connected to the damping sleeve (24). The damping piston (25) is connected to a damping sleeve (23) with a first spring (24). The damping piston (25) is connected to an adjacent fixing frame (22). The pressure regulating film (21) on the mounting frame (20) expands or contracts with the change of air pressure, driving the fixing frame (22) to move up and down, so that the damping piston (25) slides on the damping sleeve (23). The first spring (24) is squeezed, contracts and then rebounds, thereby slowing down the deformation speed of the pressure regulating film (21).

2. The electrical control cabinet for rail transit according to claim 1, characterized in that: The cabinet (1) is made of stainless steel.

3. The electrical control cabinet for rail transit according to claim 2, characterized in that: The cabinet (1) further comprises a heat exchange mechanism (3), wherein the heat exchange mechanism (3) comprises a heat pipe (30), a heat dissipation fin (31), a purification box (32) and a cold pipe (33); the upper rear side of the cabinet (1) is connected to a plurality of heat pipes (30); the rear side of the cabinet (1) is connected to a plurality of heat dissipation fins (31); the heat pipes (30) are all connected to the heat dissipation fins (31); the lower rear side of the cabinet (1) is connected to the purification box (32); the lower sides of the heat pipes (30) are all connected to the purification box (32); ), a plurality of cold pipes (33) are connected to the lower side of the purification box (32), and the cold pipes (33) are all connected to the cabinet (1). When the internal temperature of the cabinet (1) increases during operation, hot air enters the heat pipe (30), and heat dissipation is accelerated through the heat dissipation fins (31). The cooled air flows back from the purification box (32) and the cold pipes (33) to the cabinet (1). When a train passes by, the air circulation in the tunnel is accelerated, thereby increasing the heat dissipation efficiency of the heat dissipation fins (31).

4. The electrical control cabinet for rail transit according to claim 3, characterized in that: The device also includes a flow guiding mechanism (4), which includes a docking plate (40), a valve body (41), a fixing plate (42), a second spring (43) and a valve plate (44). The lower side of the mounting frame (20) is connected to the docking plate (40), the middle and rear parts of the docking plate (40) are connected to the valve body (41), the second heat pipe (30) from the right to the left is connected to the docking plate (40), the valve body (41) is connected to the fixing plate (42), and the fixing plate (42) is connected to the valve plate (44) via the second spring (43). 44), the valve plates (44) are all slidably connected to the adjacent valve bodies (41); when the air pressure inside the cabinet (1) increases, the airflow pushes the valve plate (44) to move closer to the fixing plate (42), the second spring (43) is squeezed and contracted, causing the valve body (41) to open, thereby allowing the airflow to enter the docking plate (40), and then enter the heat pipe (30) from the docking plate (40) to dissipate heat; when the air pressure inside the cabinet (1) decreases, the gas in the docking plate (40) enters the heat pipe (30) from the valve body (41) at the rear side.

5. The electrical control cabinet for rail transit according to claim 4, characterized in that: The cabinet (1) further comprises a dust removal mechanism (5), the dust removal mechanism (5) comprising a fixed seat (50), a twisted shaft (51), a dust removal frame (52), a ratchet (53), a connecting frame (54), a ratchet (55) and a third spring (56). The upper rear side of the cabinet (1) is connected to two left and right fixed seats (50), the twisted shaft (51) is rotatably connected between the fixed seats (50), the dust removal frame (52) is threadedly connected to the twisted shaft (51), the left and right sides of the twisted shaft (51) are both connected to the ratchet (53), the fixed frame (22) is both connected to the connecting frame (54), and the connecting frame (55) is connected to the third spring (56). The rear side of the connecting frame (54) is slidably connected with a ratchet (55), and the ratchet (55) is meshed with an adjacent ratchet wheel (53). A third spring (56) is connected between the upper and lower parts of the ratchet (55) and the connected connecting frame (54). When the fixed frame (22) moves, the connecting frame (54) is driven to move. When the connecting frame (54) moves upward, the ratchet (55) is meshed with the ratchet wheel (53) by the action force of the third spring (56), so that the twisted shaft (51) rotates, and then the dust removal frame (52) moves to remove dust from the heat sink fins (31).

6. The electrical control cabinet for rail transit according to claim 5, characterized in that: A cleaning sheet is provided on the dust removal frame (52).

7. The electrical control cabinet for rail transit according to claim 6, characterized in that: A guide groove is formed on the rear side of the upper portion of the cabinet body (1), and the dust removal frame (52) passes through the guide groove.

8. The electrical control cabinet for rail transit according to claim 7, characterized in that: The invention also comprises a purification mechanism (6), the purification mechanism (6) comprising an installation box (60), a dehumidification pad (61) and an electrostatic rod (62); the installation box (60) is clamped in the middle of the purification box (32); the dehumidification pad (61) is placed on the lower side of the installation box (60); and a plurality of electrostatic rods (62) are connected to the upper part of the installation box (60); after air enters the purification box (32), the dehumidification pad (61) absorbs moisture in the air, and the electrostatic rods (62) absorb dust in the air.

9. The electrical control cabinet for rail transit according to claim 8, characterized in that: The cabinet also includes a convection mechanism (7), which includes a partition plate (70) and a fan (71). The lower part of the cabinet (1) is connected to the partition plate (70), and the middle part of the partition plate (70) is connected to the fan (71). When the fan (71) is started, air inside the cabinet (1) circulates through the partition plate (70).

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