A mobile split-type combined factory building
By combining the track and the modular structure of the factory building, the problems of large size and high cost of traditional factory buildings are solved, enabling flexible adjustment and stable operation of the factory building, and meeting the usage requirements of high-end industrial fields.
Patent Information
- Authority / Receiving Office
- CN · China
- Patent Type
- Applications(China)
- Current Assignee / Owner
- QIQIHAR LEIANG HEAVY IND MASCH MFG CO LTD
- Filing Date
- 2026-03-04
- Publication Date
- 2026-05-29
AI Technical Summary
Traditional fixed factory buildings are large in size and expensive, and cannot meet the needs of production process optimization and equipment upgrading. Early mobile factory buildings had poor operational stability, insufficient wind resistance, poor sealing performance and structural stress stability, and insufficient power supply system security, making it difficult to meet the usage requirements of high-end industrial fields.
It adopts a modular structure with combined tracks and at least four factory units. Each factory unit includes a steel frame, foundation plate and walking components, equipped with a PLC controller and wireless control module, electromagnetic braking device on the outside of the rollers, and detachable thermal insulation and sound insulation composite board for the sealing plate. It is equipped with aviation quick-connect power supply interface to realize flexible movement, combination and separation of factory units.
It has achieved a reduction in factory size, reduced steel consumption and construction costs, improved operational stability and sealing performance, adapted to different production capacity needs, provided a comfortable production environment, and ensured power supply safety and flexibility.
Smart Images

Figure CN122106309A_ABST
Abstract
Description
Technical Field
[0001] This invention relates to the field of mobile factory buildings, specifically a mobile modular factory building. Background Technology
[0002] In the industrial production sector, factory buildings, as the core production carriers, directly impact production efficiency, cost control, and environmental adaptability through their structural form and performance. Traditional industrial factory buildings often employ fixed structural designs, which have several inherent drawbacks: Firstly, to accommodate large production equipment such as gantry cranes, fixed factory buildings must completely enclose the equipment, leading to a significant increase in factory size (e.g., to accommodate an 800-ton gantry crane, traditional factory buildings require oversized dimensions of 70m×40m×30m). This results in issues such as doubling steel consumption, thickening of foundations, and increased costs for high-altitude construction, causing costs to rise by more than 100% and creating significant cost pressures. Secondly, once a fixed factory building is constructed, its layout cannot be adjusted, making it difficult to adapt to the needs of production process optimization, equipment upgrades, or capacity expansion, resulting in extremely poor flexibility.
[0003] As industrial production demands greater flexibility, economy, and environmental adaptability in its facilities, the concept of mobile factories has gradually emerged. However, early related technologies were still immature: Early mobile transmission systems were prone to slippage under heavy loads and track misalignment / jamming, affecting operational stability. In harsh outdoor environments such as strong winds and extreme cold, the wind resistance, sealing performance, and structural stress stability of the factories were insufficient, making it difficult to meet the long-term industrial-grade requirements. Furthermore, early mobile factories had low control precision, making collisions likely when multiple units were combined and connected; braking and support coordination was poor; and the power supply system lacked sufficient dustproof, waterproof, and safety protection capabilities, posing potential risks. In addition, traditional mobile factories lacked comprehensive solutions in areas such as thermal insulation, soundproofing, modular assembly, and ease of maintenance, failing to balance production efficiency, operational safety, and operational economy, and thus failing to meet the stringent requirements of high-end industrial sectors such as nuclear power, petrochemicals, and hydrogen refueling. Summary of the Invention
[0004] The purpose of this invention is to provide a mobile modular factory building to solve the problems mentioned in the background art.
[0005] To achieve the above objectives, the present invention provides the following technical solution: a mobile modular factory building, comprising a modular track and at least four factory building units; the factory building units are installed on the modular track and move and assemble on the modular track; each factory building unit includes a steel structure frame, a foundation plate, and a walking assembly; the foundation plate is fixed below the columns of the steel structure frame; the walking assembly is provided on the inner side of the foundation plate and is attached to the surface of the modular track; the walking assembly includes a base, a scissor frame, a mounting plate, and a drive motor; rollers are installed at the four corners of the base; the internal shafts of the rollers are connected to a drive shaft via a steering mechanism; the drive shaft is connected to the drive motor via a chain drive structure; the scissor frame is installed on the base, and a mounting plate is installed on the upper end of the scissor frame; a cylinder is installed on the side of the scissor frame and is connected to an air pump; the steel structure frame includes an upper roof steel frame and side steel frames on both sides, and sealing plates are provided on the sides of the side steel frames and the bottom of the roof steel frame.
[0006] Furthermore, waterproof rubber strips are fixed to both ends of the frame of the factory unit. The waterproof rubber strips include T-shaped solid rubber plates and elliptical rubber airbags.
[0007] Furthermore, the mounting plate is either a horizontal plate or an L-shaped plate. The mounting plate is fixed to the top of the base plate. When the scissor bracket retracts, the bottom of the base plate will fit against the ground to form a closed bottom.
[0008] Furthermore, the walking component is equipped with a PLC controller, and the PLC controller has a wireless control module inside. Distance sensors are installed at the ends of the factory units. The walking component is controlled by a remote control to operate and shut down. The remote control can send commands to the wireless control module to control the combination and separation of the four sets of factory units installed on the combined track. The distance sensors collect the distance data between adjacent factory units in real time and feed it back to the PLC controller to realize position monitoring and safety protection during the combination and separation process.
[0009] Furthermore, an electromagnetic braking device is coaxially mounted on the outer side of the roller of the walking assembly. This device is electrically connected to the PLC controller. When the plant unit moves to the target position or the distance sensor triggers the limit signal, the PLC controller immediately instructs the electromagnetic braking device to lock the roller, which works in conjunction with the supporting effect of the scissor frame.
[0010] Furthermore, the sealing plate of the steel structure frame is made of either a detachable thermal insulation and sound insulation composite board or a color steel plate. The composite board has a composite rock wool core layer and sound insulation felt inside, and an anti-corrosion and wear-resistant coating is sprayed on the outside.
[0011] Furthermore, the side steel frame ends of the factory unit and the outer sealing grooves of the roof steel frame side beams correspond to the waterproof rubber strips, and the side beams are stuck in the sealing grooves; when multiple factory units are spliced, the adjacent side steel frames are stuck in the sealing grooves on both sides of a set of waterproof rubber strips, so that the rubber solid plate is tightly attached to the sealing plate surface, while the rubber airbags squeeze the inner side of the side beams.
[0012] Furthermore, the drive motor is an AC servo motor. The AC servo motors corresponding to the four factory units establish a bidirectional signal connection with the wireless control module of the remote controller through the PLC controller, so as to realize the synchronous start and stop, same speed operation and stepless speed regulation of the four factory units from 0.1m / min to 4m / min.
[0013] Furthermore, the steel structure frame of the factory unit is also equipped with an aviation quick-connect power supply interface on the side, and the outside of the interface is equipped with a dustproof and waterproof protective cover; the power supply line passes through the pre-set wire hole inside the side steel frame, and the wire hole is fitted with a flame-retardant insulating sleeve; and the aviation quick-connect power supply interface is electrically connected to the PLC controller.
[0014] Compared with the prior art, the beneficial effects of the present invention are:
[0015] This mobile modular factory building employs a modular structure with at least four factory units arranged on a combined track. These units can move, combine, or separate flexibly along the track, eliminating the need to enclose large equipment such as gantry cranes. With a width of only 13m, it can accommodate an 800-ton gantry crane, significantly reducing size compared to traditional fixed factory buildings. Furthermore, the multiple units can be assembled to flexibly adjust to different production capacity requirements, solving the pain points of fixed layouts and poor adaptability in traditional factory buildings. The four factory units can start and stop simultaneously, operate at the same speed, or move independently, meeting the mobility needs of different scenarios.
[0016] The factory building adopts standard-specification steel structure and insulation panels. The amount of steel used is halved compared to traditional oversized fixed factory buildings. There is no need to increase the foundation thickness or invest in high-altitude construction, effectively avoiding the problem of doubling the amount of steel used in traditional factory buildings. At the same time, the sealing panels, power supply interfaces and other components adopt modular design and snap-on / quick-connect assembly structure, which makes construction convenient, greatly shortens the construction period, and reduces construction costs and the difficulty of later operation and maintenance.
[0017] The walking assembly adopts an integrated cast base, wear-resistant rubber rollers and precision gear steering, combined with a chain drive dust cover design, which effectively solves the problems of transmission slippage and track jamming in early mobile factories. It is stable in operation and low in noise, and is suitable for long-term high-frequency movement needs.
[0018] The end face of the factory unit is equipped with a double-sealed waterproof rubber strip consisting of a T-shaped solid rubber plate and an oval rubber airbag. When multiple units are spliced together, they form two lines of defense, which can effectively prevent rainwater leakage and air infiltration. The sealing plate is made of detachable thermal insulation and sound insulation composite board or color steel plate, which not only achieves good thermal insulation and constant temperature and noise insulation effects, but also has the characteristics of UV resistance, anti-aging, corrosion resistance and wear resistance, providing a comfortable and stable internal environment for production. Attached Figure Description
[0019] Figure 1 This is a three-dimensional schematic diagram of the combined state of the factory buildings of the present invention:
[0020] Figure 2 This is a three-dimensional schematic diagram of the factory building in its disassembled state according to the present invention;
[0021] Figure 3 This is a schematic diagram of the factory building unit of the present invention;
[0022] Figure 4 This is a schematic diagram of the factory walking mechanism of the present invention;
[0023] Figure 5 This is a schematic diagram of the installation of the color steel plate on the steel structure frame of the factory building according to the present invention;
[0024] Figure 6 This is a schematic diagram of the installation of the sealing strip of the present invention;
[0025] Figure 7 This is a schematic diagram of the sealing strip of the present invention.
[0026] In the diagram: 1. Combined track; 2. Factory unit; 21. Steel structure frame; 211. Roof steel frame; 212. Side steel frame; 213. Side wall panel; 214. Waterproof rubber strip; 2141. Solid rubber board; 2142. Rubber airbag; 22. Foundation pad; 23. Walking assembly; 231. Base; 232. Roller; 233. Cylinder; 234. Air pump; 235. Scissor beam; 236. Steering gear; 237. Drive shaft; 238. Mounting plate; 239. PLC controller. Detailed Implementation
[0027] To make the technical means, creative features, objectives and effects of this invention easier to understand, the invention will be further described below in conjunction with specific embodiments.
[0028] Please see Figure 1-7This invention provides a technical solution: a mobile modular factory building, comprising a modular track 1 and at least four factory building units 2; the factory building units 2 are installed on the modular track 1 and move and assemble on the modular track 1; each factory building unit 2 includes a steel structure frame 21, a foundation plate 22, and a walking assembly 23; the foundation plate 22 is fixed below the columns of the steel structure frame 21; the walking assembly 23 is provided on the inner side of the foundation plate 22 and is attached to the surface of the modular track 1; the walking assembly 23 includes a base 231, a scissor frame 235, a mounting plate 238, and... The base 231 is equipped with a drive motor and rollers 232 are installed at the four corners of the base 231. The internal shaft of the rollers 232 is connected to the drive shaft 237 through the steering gear 236. The drive shaft 237 is connected to the drive motor through a chain drive structure. The base 231 is equipped with a scissor frame 235 and an mounting plate 238 is installed on the upper end of the scissor frame 235. A cylinder 233 is installed on the side of the scissor frame 235 and the cylinder 233 is connected to an air pump 234. The steel structure frame 21 includes an upper roof steel frame 211 and side steel frames 212 on both sides. A sealing plate 213 is provided on the side of the side steel frame 212 and the bottom of the roof steel frame 211.
[0029] The steel frame 21 is made of high-strength steel. Both the roof steel frame 211 and the side steel frames 212 are formed using high-precision welding. After rust removal and anti-corrosion treatment, the welded joints are coated with a special anti-corrosion coating, effectively resisting outdoor wind and rain erosion and air oxidation, extending the frame's service life. The connection nodes of the steel frame 21 adopt a bolt-fastening design, with anti-loosening washers and waterproof sealing gaskets at the bolt connections. Meanwhile, the pre-reserved wiring holes and mounting grooves provide convenient conditions for the layout of power supply lines and equipment pipelines.
[0030] Waterproof rubber strips 214 are fixed to both ends of the frame of the factory unit 2. The waterproof rubber strips 214 include T-shaped solid rubber plates 2141 and elliptical rubber airbags 2142.
[0031] Mounting plate 238 can be either a horizontal plate or an L-shaped plate. Mounting plate 238 is fixed to the top of base plate 22. When the scissor bracket 235 retracts, the bottom of base plate 22 will fit against the ground to form a bottom seal.
[0032] The scissor frame 235 serves as the support and lifting mechanism for the base plate 22. Its connecting rods are made of high-strength alloy material, possessing excellent telescopic performance and load-bearing capacity. The power system, consisting of cylinder 233 and air pump 234, provides stable power for the extension and retraction of the scissor frame 235. When the factory unit 2 moves to the target position, cylinder 233 drives the scissor frame 235 to retract, causing the base plate 22 to smoothly conform to the ground, forming a closed bottom structure that effectively prevents dust and rainwater from entering the factory. Conversely, when the scissor frame 235 extends, it can lift the base plate 22, allowing the walking component 23 to bear full force and ensuring smooth movement. The mounting plate 238, selected as a horizontal plate or L-shaped plate according to the installation requirements of the base plate 22, is fixed to the top of the base plate 22 with bolts, providing stable support for the connection between the scissor frame 235 and the base plate 22, ensuring that the base plate 22 is subjected to uniform force and without deviation when the scissor frame 235 extends or retracts.
[0033] The walking assembly 23 is equipped with a PLC controller 239, and the PLC controller 239 has a wireless control module inside. A distance sensor is installed at the end of the plant unit 2. The walking assembly 23 is controlled by a remote control. The remote control can send commands to the wireless control module, thereby controlling the combination and separation of the four sets of plant units 2 installed on the combined track 1. The distance sensor collects the distance data between adjacent plant units 2 in real time and feeds it back to the PLC controller 239 to realize position monitoring and safety protection during the combination and separation process.
[0034] An electromagnetic braking device is coaxially mounted on the outer side of the roller 232 of the walking assembly 23. This device is electrically connected to the PLC controller 239. When the plant unit 2 moves to the target position or the distance sensor triggers the limit signal, the PLC controller 239 immediately instructs the electromagnetic braking device to lock the roller 232, which works in conjunction with the supporting function of the scissor frame 235.
[0035] An electromagnetic braking device, coaxially mounted on the outer side of the roller 232 of the walking assembly 23, is linked with the PLC controller 239 for control. When the plant unit 2 moves to the target position, or when the distance sensor triggers the limit signal, the PLC controller 239 immediately sends a locking command. The electromagnetic coil is energized to generate a suction force, which drives the brake shoes to quickly clamp the roller 232 shaft, achieving smooth braking and preventing sudden stops that could cause the plant unit 2 to shake or the internal equipment to shift. At the same time, the braking device works in conjunction with the supporting function of the scissor frame 235. The retraction of the scissor frame 235 brings the base plate 22 into contact with the ground, further enhancing the stability of the plant unit 2 and preventing displacement caused by external collisions. In addition, the braking device is equipped with a manual release mechanism. In the event of a power outage or control system failure, personnel can manually release the brake, facilitating emergency movement or maintenance of the plant unit 2.
[0036] The base plate 22 is made of one of the following: high-strength alloy steel plate, wood, or rubber pad. Its surface is treated with an anti-slip embossed finish, providing excellent load-bearing capacity and enhancing friction with the ground when in contact with it, thus improving the stability of the factory unit 2. The walking assembly 23, as the core component for the movement of the factory unit 2, has a base 231 formed using an integrated casting process, resulting in a robust structure and even stress distribution. The rollers 232 are made of wear-resistant rubber with embedded high-strength steel cores, reducing wear on the combined track 1 and effectively lowering noise during operation, thus meeting the demands of long-term, high-frequency movement. The steering mechanism 236 employs a precision gear transmission structure, combined with a chain drive system on the drive shaft 237, ensuring flexible steering and efficient transmission for the factory unit 2. The chain drive structure is also equipped with a dust cover to prevent dust and debris from entering and affecting transmission accuracy.
[0037] The sealing panels 213 of the steel structure frame 21 are made of either detachable thermal insulation and sound insulation composite panels or color steel plates. The composite panels have an internal rock wool core layer and sound insulation felt, and an external anti-corrosion and wear-resistant coating. Sealing panels 213 are available in two options: detachable thermal insulation and sound insulation composite panels and color steel plates. Both adopt a modular design and are connected to the steel structure frame 21 via a snap-fit structure, making installation convenient and disassembly flexible, facilitating future maintenance, repair, or replacement of equipment inside the factory. The internal rock wool core layer and sound insulation felt of the thermal insulation and sound insulation composite panels provide double protection, effectively blocking outdoor temperature conduction, maintaining a constant temperature environment inside the factory, and reducing external noise interference, providing comfortable working conditions for staff and equipment. The color steel plates are coated with a fluorocarbon coating, offering excellent UV resistance and anti-aging properties, suitable for long-term outdoor use, and the coating is resistant to fading and peeling, maintaining a clean appearance of the factory.
[0038] The ends of the side steel frame 212 of the factory unit 2 and the side beams of the roof steel frame correspond to the sealing grooves on the outer side of the waterproof rubber strip 214, with the side beams being secured in the sealing grooves. When multiple factory units 2 are spliced together, adjacent side steel frames 212 are secured in the sealing grooves on both sides of a set of waterproof rubber strips 214, ensuring that the solid rubber plate 2141 is tightly fitted to the surface of the sealing plate, while the rubber airbag 2142 compresses the inner side of the side beam. This maintains good elasticity and sealing performance even under extreme weather conditions. When multiple factory units 2 are spliced together, the side beams of adjacent side steel frames 212 are precisely embedded in the sealing grooves on both sides of the waterproof rubber strip 214, and the solid rubber plate 2141 is tightly fitted to the surface of the sealing plate 213, forming the first line of sealing defense. At the same time, the rubber airbag 2142 expands after being compressed by the side beam, tightly fitting to the inner side of the side beam, forming the second line of sealing defense. This double sealing structure effectively prevents rainwater leakage and air infiltration, ensuring the airtightness and waterproofness of the factory interior.
[0039] The drive motor is an AC servo motor. The AC servo motors corresponding to the four factory units 2 establish a bidirectional signal connection with the wireless control module of the remote controller through the PLC controller 239, so as to realize the synchronous start and stop, same speed operation and stepless speed regulation of the four factory units 2 from 0.1m / min to 4m / min. The steel structure frame 21 of the factory unit 2 is also equipped with an aviation quick-connect power supply interface on the side, and the outside of the interface is equipped with a dustproof and waterproof protective cover. The power supply line is run through the pre-set wire hole inside the side steel frame 212, and the wire hole is fitted with a flame-retardant insulating sleeve. The aviation quick-connect power supply interface is electrically connected to the PLC controller 239.
[0040] The aviation quick-connect power supply interface on the side of plant unit 2 features a design to prevent mis-insertion and detachment, effectively avoiding damage to equipment caused by reversed positive and negative connections during wiring or loosening of the interface during use. The dustproof and waterproof protective cover on the outside of the interface can be tightly closed when not in use to prevent dust and rainwater from entering the interface, ensuring power supply safety. Power lines are routed through pre-set wiring holes inside the side steel frame 212. Flame-retardant insulating sleeves installed inside these holes not only prevent leakage caused by wire wear but also block the spread of flames, improving the plant's fire resistance rating. The wiring layout strictly adheres to the principle of separating strong and weak current circuits, reducing electromagnetic interference and ensuring the stability and reliability of power supply to equipment such as the PLC controller 239 and drive motors.
[0041] The PLC controller 239, serving as the "control center" of the entire plant, has a built-in wireless control module that can establish a stable two-way signal connection with the remote controller, enabling remote control of plant unit 2. The remote controller features a user-friendly operation panel with clearly labeled buttons for combination, separation, start / stop, and speed adjustment, and also includes an emergency stop button to immediately cut off power output in case of emergencies, ensuring operational safety. The PLC controller 239 incorporates a fault diagnosis module that monitors the operating status of key components such as the drive motor, walking assembly 23, and electromagnetic braking device in real time. When an abnormality is detected, it issues an audible and visual alarm signal via the remote controller and automatically stores the fault information for quick troubleshooting and repair. A distance sensor, installed at the end of plant unit 2 and employing infrared sensing technology, is unaffected by ambient light or weather conditions. It can accurately collect the distance data between adjacent plant units 2 in real time and feed the data back to the PLC controller 239. The PLC controller 239 automatically adjusts the operating status of the drive motor based on the distance data, ensuring precise alignment when multiple plant units 2 are joined, preventing collision damage, and achieving intelligent position monitoring during the combination and separation process.
Claims
1. A mobile modular factory building, characterized in that: The system includes a combined track (1) and at least four sets of factory units (2); the factory units (2) are installed on the combined track (1) and move and combine on the combined track (1). The factory unit (2) includes a steel structure frame (21), a foundation plate (22) and a walking component (23). The foundation plate (22) is fixed below the columns of the steel structure frame (21). The walking component (23) is provided on the inner side of the foundation plate (22) and is attached to the surface of the combined track (1). The walking component (23) includes a base (231), a scissor frame (235), a mounting plate (238) and a drive motor. The base (231) is... Rollers (232) are installed at the four corners. The internal shaft of the roller (232) is connected to the drive shaft (237) through the steering gear (236). The drive shaft (237) is connected to the drive motor through the chain drive structure. The base (231) is equipped with a scissor frame (235). The upper end of the scissor frame (235) is equipped with an mounting plate (238). The side of the scissor frame (235) is equipped with a cylinder (233). The cylinder (233) is connected to an air pump (234). The steel structure frame (21) includes an upper roof steel frame (211) and side steel frames (212) on both sides. Sealing plates (213) are provided on the side of the side steel frame (212) and the bottom of the roof steel frame (211).
2. The mobile modular factory building according to claim 1, characterized in that: Waterproof rubber strips (214) are fixed to both ends of the frame of the factory unit (2). The waterproof rubber strips (214) include T-shaped solid rubber plates (2141) and elliptical rubber airbags (2142).
3. The mobile modular factory building according to claim 2, characterized in that: The mounting plate (238) is either a horizontal plate or an L-shaped plate. The mounting plate (238) is fixed on the top of the base plate (22). When the scissor bracket (235) retracts, the bottom of the base plate (22) will fit against the ground to form a bottom seal.
4. The mobile modular factory building according to claim 1, characterized in that: The walking component (23) is equipped with a PLC controller (239), and the PLC controller (239) is equipped with a wireless control module. A distance sensor is installed at the end of the factory unit (2). The walking component (23) is controlled to run and shut down by a remote controller. The remote controller can send instructions to the wireless control module to control the combination and separation of the four factory units (2) installed on the combined track (1). The distance sensor collects the distance data between adjacent factory units (2) in real time and feeds it back to the PLC controller (239) to realize position monitoring and safety protection during the combination and separation process.
5. The mobile modular factory building according to claim 4, characterized in that: The roller (232) of the walking component (23) is coaxially fitted with an electromagnetic braking device on the outside. This device is electrically connected to the PLC controller (239). When the plant unit (2) moves to the target position or the distance sensor triggers the limit signal, the PLC controller (239) immediately instructs the electromagnetic braking device to lock the roller (232), which works in conjunction with the supporting effect of the scissor frame (235).
6. The mobile modular factory building according to claim 3, characterized in that: The sealing plate (213) of the steel structure frame (21) is made of either a detachable thermal insulation and sound insulation composite board or a color steel plate. The composite board has a composite rock wool core layer and sound insulation felt inside, and an anti-corrosion and wear-resistant coating is sprayed on the outside.
7. The mobile modular factory building according to claim 6, characterized in that: The side steel frame (212) ends of the factory building unit (2) and the outer sealing groove of the waterproof rubber strip (214) corresponding to the side beam of the roof steel frame are sealed in the sealing groove; when multiple factory building units (2) are spliced, the adjacent side steel frames (212) are sealed in the sealing grooves on both sides of a set of waterproof rubber strips (214), so that the rubber solid plate (2141) is tightly attached to the sealing plate surface, and at the same time the rubber airbag (2142) squeezes the inner side of the side beam.
8. The mobile modular factory building according to claim 5, characterized in that: The drive motor is an AC servo motor. The AC servo motors corresponding to the four factory units (2) establish a two-way signal connection with the wireless control module of the remote controller through the PLC controller (239) to realize the synchronous start and stop, same speed operation and stepless speed regulation of the four factory units (2) from 0.1m / min to 4m / min.
9. The mobile modular factory building according to claim 4, characterized in that: The steel structure frame (21) of the factory unit (2) is also provided with an aviation quick-connect power supply interface on the side, and the outside of the interface is equipped with a dustproof and waterproof protective cover; the power supply line is passed through the pre-set wire hole inside the side steel frame (212), and the wire hole is fitted with a flame-retardant insulating sleeve; and the aviation quick-connect power supply interface is electrically connected to the PLC controller (239).