Energy-saving and heat-dissipating type electric power and electrical control cabinet

Abstract

This invention relates to the field of electrical equipment cabinet technology, specifically to an energy-saving and heat-dissipating power electrical control cabinet. The cabinet includes a control unit with a first partition dividing the space within it into an air intake chamber and an equipment chamber. A heat dissipation mechanism is also provided within the control unit, including an air intake assembly located within the air intake chamber. This assembly comprises a main air intake duct, several air outlet ducts, and several mounting plates. Several mounting holes are provided on the side of the first partition near the air intake chamber. Through holes are provided on the mounting plates, and fixing bolts are installed within these through holes and screwed into their corresponding mounting holes. This energy-saving and heat-dissipating power electrical control cabinet overcomes the problem of insufficient localized temperature reduction in existing heat dissipation methods. Furthermore, the position of the heat dissipation vents can be flexibly adjusted to address the issue of adjusting the position of equipment within the power electrical control cabinet.

Description

Technical Field

[0001] This invention relates to the field of electrical equipment cabinet technology, specifically to an energy-saving and heat-dissipating power electrical control cabinet. Background Technology

[0002] As a key component of power systems, power control cabinets integrate various electronic components such as circuit breakers, contactors, frequency converters, and programmable logic controllers. These components generate a significant amount of heat during prolonged high-load operation. If this heat cannot be dissipated effectively and promptly, the internal temperature of the cabinet will become excessively high, affecting the operational stability of the electronic components, potentially accelerating the aging of insulation materials, and even leading to equipment failure or fire accidents. Currently, a common approach to address the heat dissipation problem of control cabinets is to install exhaust fans at the top of the cabinet for forced ventilation. However, this simple top-exhaust method has limitations. Its cooling efficiency is insufficient to meet the demands of localized high-heat areas. Top exhaust relies primarily on creating an upward airflow channel to replace the air throughout the cabinet. However, for hot spots generated in specific areas within the cabinet, the long airflow path and the potential obstruction from internal components make it difficult for top exhaust to create a targeted, high-speed airflow. This results in severe localized heat accumulation, making it difficult to quickly reduce the temperature.

[0003] To address localized overheating, existing technologies typically involve creating dedicated ventilation holes or installing fixed axial fans near the anticipated high-heat-generating components. However, this approach has drawbacks. The installation positions of electronic components within electrical control cabinets are not static and are often adjusted based on actual operating conditions, customer customization needs, or subsequent maintenance and modifications. When a component's installation position deviates from the pre-designed ventilation openings, these fixed cooling structures lose their cooling effect, creating heat dissipation blind spots. Re-drilling holes or modifying the cabinet is not only cumbersome but may also compromise its dustproof and waterproof performance. On the other hand, creating numerous ventilation holes to cover all possible locations reduces the cabinet's structural strength, making it susceptible to the intrusion of external dust and moisture, affecting the lifespan and insulation performance of electrical components. Summary of the Invention

[0004] To address the aforementioned problems, the main objective of this invention is to provide an energy-saving and heat-dissipating power electrical control cabinet that overcomes the problem of localized temperature being difficult to reduce in a timely manner in existing heat dissipation methods. Furthermore, the position of the heat dissipation vents can be flexibly adjusted to solve the problem of adjusting the position of equipment within the power electrical control cabinet.

[0005] To achieve the above objectives, the present invention provides an energy-saving and heat-dissipating power electrical control cabinet, including a control cabinet body, a first partition plate is provided inside the control cabinet body, the first partition plate is vertically arranged inside the control cabinet body, and the first partition plate divides the space inside the control cabinet body into an air inlet chamber and an equipment chamber. The control cabinet is equipped with a heat dissipation mechanism, which includes an air intake component located in the air intake chamber. The air intake component includes a main air intake duct, several air outlet ducts, and several mounting plates. The first baffle plate has a through slot on its vertical center line. The mounting plate has an air outlet. The air outlet pipe is connected to one side of the air outlet. A transverse pipe is connected to the other side of the air outlet. The transverse pipe is located in the through slot and is connected to an air expander. The air expander is located in the equipment compartment. The first baffle plate has several mounting holes on one side near the air inlet. The mounting plate has through holes, and fixing bolts are installed in the through holes. The fixing bolts are screwed into their corresponding mounting holes.

[0006] Preferably, it also includes a fan, which is fixedly installed on the top surface of the control cabinet. The upper end of the main air inlet pipe passes through the control cabinet and is connected to the fan. The air outlet pipes are evenly distributed on the main air inlet pipes. The air outlet pipes are equipped with valves, and the middle section of the air outlet pipes is a retractable flexible hose.

[0007] Preferably, the control cabinet is further provided with a second partition plate, which is parallel to the first partition plate and is vertically arranged in the equipment compartment. The second partition plate is provided with several ventilation holes, and the side of the control cabinet near the second partition plate is provided with several dustproof holes.

[0008] Preferably, the air expansion component includes an air inlet chamber, an air concentrator, and several air outlets. The air inlet chamber is connected to the transverse pipe and is arranged laterally on the side of the first baffle near the second baffle. The air outlets are distributed on the outer end face of the air inlet chamber. The air concentrator is fixed on the air inlet chamber and surrounds all the air outlets.

[0009] Preferably, the heat dissipation mechanism further includes a dust collection assembly, which includes a first dust collection chamber, a second dust collection chamber, a positioning block, a control component, and two movable side plates. The first dust collection chamber and the second dust collection chamber are located at the bottom of the control cabinet and are respectively located on both sides of the second partition plate.

[0010] Preferably, the front and rear ends of the second partition plate are respectively fixed with positioning strips, the two sides of the positioning strips are provided with arc-shaped grooves, and the two ends of the inner side of the movable side plate are respectively provided with protrusions, which cooperate with the arc-shaped grooves.

[0011] Preferably, the outer end of the movable side plate is fixedly connected to the inner side of the positioning block. The positioning block is provided with threaded holes and limiting holes. The control component includes a drive motor, a threaded rod, and a limit rod. The drive motor is installed on the top of the control cabinet. The output end of the drive motor passes through the top surface of the control cabinet and is connected to the upper end of the threaded rod.

[0012] Preferably, the lower end of the positioning strip on the outer end face of the second partition plate is provided with a stop plate, the lower end of the threaded rod is rotatably connected to the stop plate, the limiting rod is vertically fixed between the stop plate and the top surface of the control cabinet, the threaded rod is screwed into the threaded hole, the limiting rod passes through the limiting hole, and the inner side of the movable side plate is provided with a cleaning brush.

[0013] Preferably, the front face of the control cabinet is provided with two opposing first cabinet doors, and the side of the control cabinet near the first partition is provided with a second cabinet door.

[0014] Preferably, the equipment compartment is provided with several vertically fixed brackets and several horizontally distributed mounting brackets. The brackets are arranged in two horizontal rows and have several positioning holes. The mounting brackets are installed on the brackets at different heights by bolts.

[0015] The beneficial effects of the present invention through the above technical solution include: (1) The energy-saving heat dissipation type power electrical control cabinet of the present invention, by setting a heat dissipation mechanism, and the air outlet of the heat dissipation mechanism is distributed inside the control cabinet, can accurately deliver air to dissipate heat in the local area where high temperature is actually generated inside the control cabinet, overcoming the defects of the traditional top exhaust heat dissipation method, which has a long airflow path, is easily blocked, and is difficult to act on specific components, thereby effectively ensuring the stable operation and service life of key components. (2) In addition, the heat dissipation structure of the present invention has flexible adaptability, which overcomes the contradiction between the fixed position of the air outlet and the variable installation position of the components. The position of the air outlet in the present invention is adjustable, specifically by adjusting the position of the mounting plate, which solves the problem of the fixed position of the heat dissipation air outlet. This allows the position of the heat dissipation air outlet to be adjusted as needed according to the actual installation layout of the electrical components. Whether it is optimized and matched according to the component arrangement during the initial installation, or when the internal layout is changed due to technical transformation or component addition or subtraction, the present application does not need to make secondary openings or modifications to the cabinet to adapt to the new heat dissipation requirements, which greatly improves the versatility and modification convenience of the control cabinet.

[0016] (3) While achieving flexible heat dissipation, the present invention minimizes the number of fixed permanent heat dissipation holes, combining heat dissipation effect with cabinet protection requirements. By dynamically opening or closing the heat dissipation channel, or connecting the internal and external air ducts only when heat dissipation is needed, the invention can maintain the sealing performance of the control cabinet to the maximum extent while meeting the requirements of efficient heat dissipation. This effectively prevents dust, humid air or small insects from entering the cabinet through redundant heat dissipation holes when not in operation, thus improving the reliability and safety of the control cabinet in harsh industrial environments. Attached Figure Description

[0017] The present invention will now be described in further detail with reference to the accompanying drawings and specific embodiments.

[0018] Figure 1 This is a schematic diagram of the structure of the energy-saving and heat-dissipating power electrical control cabinet of the present invention.

[0019] Figure 2 This is a schematic diagram of the internal structure of the energy-saving and heat-dissipating power electrical control cabinet of the present invention.

[0020] Figure 3 This invention relates to an energy-saving and heat-dissipating power electrical control cabinet. Figure 2 A schematic diagram of part A in the diagram.

[0021] Figure 4 This invention relates to an energy-saving and heat-dissipating power electrical control cabinet. Figure 2 A schematic diagram of section B in the diagram.

[0022] Figure 5 This is a partial structural schematic diagram of the energy-saving and heat-dissipating power electrical control cabinet of the present invention.

[0023] Explanation of reference numerals in the attached drawings: 1. Control cabinet; 11. First partition plate; 111. Through slot; 112. Mounting hole; 113. Fixing bolt; 12. Second partition plate; 121. Ventilation hole; 13. Air inlet chamber; 14. Equipment compartment; 15. Dustproof hole; 16. First cabinet door; 17. Second cabinet door; 21. Main air inlet duct; 22. Air outlet duct; 221. Flexible hose; 23. Mounting plate; 231. Air outlet; 24. Cross-pipe; 25. Air diffuser; 251. Air inlet chamber; 252. Air constrictor plate; 253. Air outlet; 26. Fan; 31. First dust collection bin; 32. Second dust collection bin; 33. Positioning block; 331. Threaded hole; 332. Restriction hole; 341. Drive motor; 342. Threaded rod; 343. Limiting rod; 35. Moving side plate; 351. Protrusion; 36. Positioning strip; 361. Arc-shaped groove; 37. Stop plate; 41. Fixing bracket; 411. Positioning hole; 42. Mounting bracket. Detailed Implementation

[0024] The technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Many specific details are set forth in the following description to provide a thorough understanding of the present invention. However, the present invention may also be implemented in other ways different from those described herein. Those skilled in the art can make similar extensions without departing from the spirit of the present invention. Therefore, the present invention is not limited to the specific embodiments disclosed below.

[0025] First Embodiment like Figure 1 and Figure 2The diagram shows the overall structure and internal structure of the energy-saving heat-dissipating power electrical control cabinet according to the first embodiment of the present invention. This energy-saving heat-dissipating power electrical control cabinet includes a control cabinet body 1. A first partition plate 11 is provided inside the control cabinet body 1. The first partition plate 11 is vertically arranged within the control cabinet body 1, dividing the space inside the control cabinet body 1 into an air inlet chamber 13 and an equipment chamber 14. The equipment chamber 14 contains several vertically installed mounting brackets 41 and horizontally distributed mounting brackets 42. The mounting brackets 41 are arranged in two horizontal rows. In this embodiment, there are four mounting brackets 41 arranged in two rows, front and back. The mounting brackets 42 are arranged at the top corner of the equipment compartment 14. There are several mounting brackets 42, and the fixed brackets 41 are provided with several positioning holes 411. The mounting brackets 42 are installed on the fixed brackets 41 at different heights by bolts. Some mounting brackets 42 are also provided with mounting platforms (not shown in the figure). The mounting brackets 42 are also provided with positioning holes 411. The mounting platforms can be fixed to the mounting brackets 42 by bolts. In addition, the electronic components in the control cabinet are set on different mounting brackets 42 or mounting platforms. The installation position of the mounting brackets 42 on the fixed brackets 41 can be adjusted arbitrarily. At the same time, the position of the electronic components on the mounting brackets 42 can also be adjusted according to the requirements.

[0026] Please continue reading. Figure 2 and Figure 3 As shown, in this embodiment, the control cabinet 1 is equipped with a heat dissipation mechanism, which includes an air intake component located within the air intake chamber 13. The air intake component includes a main air intake pipe 21, several air outlet pipes 22, and several mounting plates 23. The main air intake pipe 21 is fixedly installed vertically within the air intake chamber 13. The air outlet pipes 22 are evenly distributed on the main air intake pipe 21 and are equipped with valves. The middle section of the air outlet pipe 22 is a retractable flexible hose 221. In addition, this embodiment also includes a fan 26, which is fixedly installed on the top surface of the control cabinet 1. The upper end of the main air intake pipe 21 passes through the control cabinet 1 and connects to the fan 26. By starting the fan 26, external air can be delivered to the main air intake pipe 21 and then to the air outlet pipes 22. The valves on the air outlet pipes 22 can control the opening and closing of the air supply at any time.

[0027] In addition, in this embodiment, the first baffle plate 11 has a through slot 111 on its vertical center line, the mounting plate 23 has an air outlet 231, the air outlet pipe 22 is located on one side of the mounting plate 23 and is connected to one side of the air outlet 231, and a transverse pipe 24 is connected to the other side of the air outlet 231. That is, the transverse pipe 24 and the air outlet pipe 22 are distributed on both sides of the mounting plate 23. The transverse pipe 24 is located in the through slot 111 and is connected to an air expander 25, which is located in the equipment compartment 14. Furthermore, the first baffle plate 11 has several mounting holes 112 on one side near the air inlet compartment 13. The mounting holes 112 are distributed on both sides of the through slot 111 and are distributed at different heights. The mounting plate 23 has through holes, and fixing bolts 113 are installed in the through holes. The fixing bolts 113 are screwed into their corresponding mounting holes 112.

[0028] In this embodiment, the air expansion component 25 is provided with an air inlet chamber 251, an air concentrator 252 and several air outlets 253. The air inlet chamber 251 is connected to the transverse pipe 24 and is arranged laterally on the side of the first baffle 11 near the second baffle 12. The air outlets 253 are distributed on the outer end face of the air inlet chamber 251. The air concentrator 252 is fixed on the air inlet chamber 251 and surrounds all the air outlets 253.

[0029] In this embodiment, the air inlet chamber 13 is equipped with a heat dissipation structure. The air outlet duct 22, the transverse pipe 24, and the air expander 25 are connected in sequence in the heat dissipation structure. The positions of the air outlet duct 22, the transverse pipe 24, and the air expander 25 are adjusted by adjusting the position of the mounting plate 23. Specifically, the mounting plate 23 is installed at different heights on the first partition plate 11 by fixing bolts 113. When local heat dissipation is required for equipment on a certain mounting frame 42, the position of the mounting plate 23 is adjusted so that the position of the end of the corresponding air outlet duct 22, the transverse pipe 24, and the air expander 25 are aligned with it, thereby achieving a precise heat dissipation effect. If there are many local devices, one or two heat dissipation structures consisting of air outlet duct 22, transverse pipe 24, and air expander 25 can be added and arranged adjacent to each other in the vertical direction to increase the heat dissipation air volume. Since the middle structure of the air outlet duct 22 is a telescopic flexible hose 221, and its maximum length after stretching is sufficient to adjust the above-mentioned heat dissipation related structures to any height. In addition, several dustproof holes 15 are provided on the side of the control cabinet 1 near the second partition plate 12, so that convection air can be formed in the equipment compartment 14 to remove the heat of the high-temperature electronic components.

[0030] In other embodiments, the energy-saving heat dissipation power control cabinet of the present invention is further equipped with a controller and several temperature sensors. The temperature sensors are installed at different positions on different mounting brackets 42, specifically according to the position of the electronic components on the mounting brackets 42, thereby monitoring the changes in the ambient temperature. If the temperature exceeds a preset range, a signal is sent to the controller. The controller is electrically connected to the valve on the air outlet duct 22, so the controller can send a signal to the valve on the air outlet duct 22 corresponding to the electronic component at the height of the temperature sensor that sent the signal, and then the air blowing heat dissipation mode will be activated. In addition, the controller is also electrically connected to the fan 26. Furthermore, in this embodiment, the front end of the control cabinet 1 is provided with two opposing first cabinet doors 16, and the side of the control cabinet 1 near the first partition plate 11 is provided with a second cabinet door 17. The second cabinet door 17 facilitates the installation and maintenance of the heat dissipation mechanism.

[0031] Second Embodiment Please see Figure 2 , Figure 4 and Figure 5 As shown, the control cabinet 1 in this embodiment is also provided with a second partition plate 12. The second partition plate 12 is parallel to the first partition plate 11 and is vertically arranged in the equipment compartment 14. The second partition plate 12 is provided with a plurality of ventilation holes 121. The heat dissipation mechanism in this embodiment is also provided with a dust collection assembly. The dust collection assembly is provided with a first dust collection chamber 31, a second dust collection chamber 32, a positioning block 33, a control component and two movable side plates 35. The first dust collection chamber 31 and the second dust collection chamber 32 are located at the bottom of the control cabinet 1 and are respectively located on both sides of the second partition plate 12. The front and rear end faces of the second partition plate 12 are respectively fixedly provided with positioning strips 36. The two sides of the positioning strips 36 are provided with arc-shaped slots 361. The two ends of the inner side of the movable side plate 35 are respectively provided with protrusions 351, and the protrusions 351 cooperate with the arc-shaped slots 361.

[0032] In addition, in this embodiment, the outer end of the movable side plate 35 is fixedly connected to the inner side of the positioning block 33. The positioning block 33 is provided with a threaded hole 331 and a limiting hole 332. The control components include a drive motor 341, a threaded rod 342 and a limiting rod 343. The drive motor 341 is installed on the top of the control cabinet 1. The output end of the drive motor 341 passes through the top surface of the control cabinet 1 and is connected to the upper end of the threaded rod 342. The lower end of the positioning strip 36 on the outer end face of the second partition plate 12 is provided with a stop plate 37. The lower end of the threaded rod 342 is rotatably connected to the stop plate 37. The limiting rod 343 is vertically fixed between the stop plate 37 and the top surface of the control cabinet 1. The threaded rod 342 is screwed into the threaded hole 331 and the limiting rod 343 passes through the limiting hole 332. The inner side of the movable side plate 35 is provided with a cleaning brush.

[0033] In this embodiment, when the energy-saving heat dissipation type power electrical control cabinet is actually applied, as the heat dissipation mechanism continuously blows air to cool the electronic components in the equipment compartment 14, in order to prevent the dust in the equipment compartment 14 from being blown up at any time, a dust collection component can be used to collect some of the large-diameter dust particles in the air. Specifically, in this embodiment, the second partition plate 12 is provided with several ventilation holes 121. When the equipment is cooled by blowing air, the dust in the air will accumulate on the second partition plate 12. Larger-diameter dust particles will fall into the first dust collection compartment 31 on one side of the second partition plate 12, while some dust will accumulate in the ventilation holes 121. By driving the threaded rod 342 to rotate through the drive motor 341, the positioning block 33 can be moved in the vertical direction, thereby driving the movement of the moving side plate 35. Since the limiting rod 343 is located in the limiting hole 332, it can provide a limiting effect for the positioning block 33. At the same time, the protrusions 351 at both ends of the moving side plate 35 are also locked in their corresponding arc-shaped slots 361, thereby improving the stability of the movement process of the above-mentioned components. Since the inner wall of the movable side plate 35 is equipped with a cleaning brush, the dust accumulated on both sides of the second partition plate 12 can be cleaned into the first dust collection chamber 31 or the second dust collection chamber 32 below it, thereby preventing dust from flying and accumulating in the equipment chamber 14 and affecting the use of other electronic components.

[0034] Obviously, the described embodiments are only some, not all, of the embodiments of the present invention. All other embodiments obtained by those skilled in the art based on the embodiments of the present invention without inventive effort are within the scope of protection of the present invention.

Claims

1. An energy-saving and heat-dissipating power electrical control cabinet, characterized in that, Includes a control cabinet (1), and a first partition (11) is provided inside the control cabinet (1). The first partition (11) is vertically arranged inside the control cabinet (1) and divides the space inside the control cabinet (1) into an air inlet chamber (13) and an equipment chamber (14). The control cabinet (1) is equipped with a heat dissipation mechanism, which includes an air intake component located in the air intake chamber (13). The air intake component includes an air intake main pipe (21), several air outlet pipes (22), and several mounting plates (23). The first baffle (11) has a through slot (111) on its vertical center line. The mounting plate (23) has an air outlet. The air outlet pipe (22) is connected to one side of the air outlet. A transverse pipe (24) is connected to the other side of the air outlet. The transverse pipe (24) is located in the through slot (111). The transverse pipe (24) is connected to an air diffuser (25). The air diffuser (25) is located in the equipment compartment (14). The first baffle (11) has several mounting holes (112) on one side near the air inlet (13). The mounting plate (23) has through holes, and fixing bolts (113) are provided in the through holes. The fixing bolts (113) are screwed into their corresponding mounting holes (112).

2. The energy-saving and heat-dissipating power control cabinet according to claim 1, characterized in that, It also includes a fan (26), which is fixedly installed on the top surface of the control cabinet (1). The upper end of the main air inlet pipe (21) passes through the control cabinet (1) and is connected to the fan (26). The air outlet pipe (22) is evenly distributed on the main air inlet pipe (21). The air outlet pipe (22) is equipped with a valve. The middle section of the air outlet pipe (22) is a retractable flexible hose (221).

3. The energy-saving and heat-dissipating power control cabinet according to claim 1, characterized in that, The control cabinet (1) is also provided with a second partition (12), which is parallel to the first partition (11) and is vertically arranged in the equipment compartment (14). The second partition (12) is provided with a number of ventilation holes (121), and the side of the control cabinet (1) near the second partition (12) is provided with a number of dustproof holes (15).

4. The energy-saving and heat-dissipating power control cabinet according to claim 3, characterized in that, The air expansion component (25) includes an air inlet chamber (251), an air concentrator (252), and a plurality of air outlets (253). The air inlet chamber (251) is connected to the transverse pipe (24). The air inlet chamber (251) is arranged laterally on the side of the first baffle (11) near the second baffle (12). The air outlets (253) are distributed on the outer end face of the air inlet chamber (251). The air concentrator (252) is fixed on the air inlet chamber (251) and surrounds all the air outlets (253).

5. The energy-saving and heat-dissipating power control cabinet according to claim 3, characterized in that, The heat dissipation mechanism also includes a dust collection assembly, which includes a first dust collection chamber (31), a second dust collection chamber (32), a positioning block (33), a control component, and two movable side plates (35). The first dust collection chamber (31) and the second dust collection chamber (32) are located at the bottom of the control cabinet (1) and are respectively located on both sides of the second partition plate (12).

6. The energy-saving and heat-dissipating power control cabinet according to claim 5, characterized in that, The front and rear ends of the second baffle (12) are respectively fixed with positioning strips (36), and the two sides of the positioning strips (36) are provided with arc-shaped slots (361). The two ends of the inner side of the movable side plate (35) are respectively provided with protrusions (351), and the protrusions (351) cooperate with the arc-shaped slots (361).

7. The energy-saving and heat-dissipating power control cabinet according to claim 6, characterized in that, The outer end of the movable side plate (35) is fixedly connected to the inner side of the positioning block (33). The positioning block (33) is provided with a threaded hole (331) and a limiting hole (332). The control component includes a drive motor (341), a threaded rod (342) and a limiting rod (343). The drive motor (341) is installed on the top of the control cabinet (1). The output end of the drive motor (341) passes through the top surface of the control cabinet (1) and is connected to the upper end of the threaded rod (342).

8. The energy-saving and heat-dissipating power control cabinet according to claim 7, characterized in that, The lower end of the positioning strip (36) on the outer end face of the second partition plate (12) is provided with a stop plate (37). The lower end of the threaded rod (342) is rotatably connected to the stop plate (37). The limiting rod (343) is vertically fixed between the stop plate (37) and the top surface of the control cabinet (1). The threaded rod (342) is screwed into the threaded hole (331). The limiting rod (343) passes through the limiting hole (332). The inner side of the movable side plate (35) is provided with a cleaning brush.

9. The energy-saving heat dissipation type power electrical control cabinet according to any one of claims 1 to 8, characterized in that, The front face of the control cabinet (1) is provided with two first cabinet doors (16) arranged opposite each other, and the side of the control cabinet (1) near the first partition (11) is provided with a second cabinet door (17).

10. The energy-saving heat dissipation type power electrical control cabinet according to any one of claims 1 to 8, characterized in that, The equipment compartment (14) is provided with several vertically fixed brackets (41) and several horizontally distributed mounting brackets (42). The brackets (41) are arranged in two horizontal rows. The brackets (41) are provided with several positioning holes (411). The mounting brackets (42) are installed on the brackets (41) at different heights by bolts.

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