An on-line monitoring device for electrical information of superfast rail train

Abstract

The application provides an online monitoring device for electrical information of superfast rail train, which comprises a mounting base, a protective cover connected to the upper end of the mounting base, a honeycomb heat-conducting shield placed and connected to the upper end of the mounting base, a semi-cylindrical air extraction cover penetrating and fixedly connected to the upper end of the honeycomb heat-conducting shield, a side-open detection module mounting shell movably connected to the upper end of the mounting base, a sensor module penetrating and fixedly connected to the carrier plate, a data line head protection sleeve slidingly connected to the inner side of the data interface protection sleeve, a plurality of pressure point ceramic actuators fixedly connected to the inner side of the ventilation channel, and a resilient buffer pad embedded and mounted at the upper end of the raised gasket. The device can effectively reduce common faults such as data acquisition distortion, accidental damage of equipment, loosening and falling of data lines, thereby improving the reliability and operation and maintenance efficiency of the online monitoring of electrical information of superfast rail train.

Description

Technical Field

[0001] This invention relates to the field of online monitoring of electrical information of ultra-high-speed rail trains, and more specifically, to an online monitoring device for electrical information of ultra-high-speed rail trains. Background Technology

[0002] With the rapid development of rail transit technology towards high speed and intelligence, ultra-fast rail systems such as high-speed maglev trains and vacuum tube trains have become the core direction for building a strong transportation nation in the future. Ultra-fast rail trains have significantly increased traction power and operating speed, and their electrical systems operate under extreme conditions of high load, strong electromagnetic fields, and severe vibrations for extended periods. This places far more stringent requirements on the reliability and stability of online electrical information monitoring devices than on traditional high-speed trains. Existing technologies, such as Chinese Patent No. CN119471109A, disclose an online monitoring device for the electrical system of a rail train, which achieves basic collection of electrical parameters by arranging sensors. However, such devices have significant limitations in adapting to the extreme operating environment of ultra-fast rail trains and cannot meet the requirements for long-term, uninterrupted, and stable operation.

[0003] The existing electrical monitoring devices for rail trains have the following main technical defects: First, there is an inherent contradiction between the traditional electromagnetic shielding structure and heat dissipation requirements. The sealed shielding shell has poor heat dissipation performance and is prone to internal overheating when the train is running under continuous high load. Second, most of them use a single passive vibration isolation method, which is difficult to effectively counteract the complex vibration and impact generated by the train operation, and is prone to data acquisition distortion and damage to internal components. Finally, the data interface lacks a targeted protection design, and the overall installation structure of the device is complex, making it inconvenient to quickly install and maintain in the small space of the train's electrical cabinet. Summary of the Invention

[0004] The present invention aims to solve the technical problems mentioned in the background art and provide an online monitoring device for electrical information of ultra-fast rail trains.

[0005] To achieve the above objectives, the present invention provides the following technical solution: an online monitoring device for electrical information of ultra-fast rail trains, comprising a mounting chassis, a protective cover fitted and connected to the upper end of the mounting chassis, a honeycomb-shaped thermal conductive shield placed and connected to the upper end of the mounting chassis, a semi-cylindrical exhaust hood penetrating and fixedly connected to the upper end of the honeycomb-shaped thermal conductive shield, a side-opening detection module mounting shell movably connected to the upper end of the mounting chassis, a carrier plate fixedly connected to the upper end of the mounting chassis by bolts, a sensor module penetrating and fixedly connected to the carrier plate, heat dissipation fins penetrating and fixedly connected to both ends of the inner side of the side-opening detection module mounting shell, and a heat dissipation fin penetrating and fixedly connected to the lower end of the inner side of the side-opening detection module mounting shell. A data interface protective sleeve is fixedly connected, and a data cable end protective sleeve is slidably connected through the inner side of the data interface protective sleeve. Multiple data cable docking protective sleeves are fixedly connected through one end of the data cable end protective sleeve. A ventilation duct is opened at the upper end of the mounting chassis. Multiple pressure point ceramic actuators are fixedly connected to the inner side of the ventilation duct. Multiple symmetrical first exhaust fans are embedded on one side of the outer side of the protective cover. Multiple symmetrical air intake fans are embedded on the other side of the outer side of the protective cover. Multiple second exhaust fans are embedded on the inner side of the semi-cylindrical exhaust hood. A lifting pad is movably connected to the upper end of the mounting chassis. An elastic buffer pad is embedded in the upper end of the lifting pad.

[0006] Furthermore, symmetrical limiting shafts are fixedly connected to both sides of the mounting chassis, and symmetrical foldable support legs are movably connected to both sides of the mounting chassis. A positioning bushing is fixedly connected to one end of each foldable support leg, and the positioning bushing rotates and is sleeved and connected to the limiting shaft.

[0007] Furthermore, the lower ends of the mounting chassis and the foldable support legs are both fixedly connected with flexible anti-slip and wear-resistant pads, and one end of the foldable support legs and the flexible anti-slip and wear-resistant pad connected thereto are both provided with anchor thread fixing holes.

[0008] Furthermore, both the carrier plate and the sensor module penetrate the upper surface of the honeycomb thermal conductive shield, and the upper ends of both the carrier plate and the sensor module are located inside the semi-cylindrical exhaust hood.

[0009] Furthermore, the upper end of the mounting chassis is movably connected to a plurality of symmetrical shock-absorbing pads, and the lower ends of both sides of the honeycomb thermal conductive shield are fixedly connected to symmetrical second fixed connecting plates, which are movably connected to the upper ends of the shock-absorbing pads. The lower ends of both sides of the protective outer cover are fixedly connected to symmetrical first fixed connecting plates, which are movably connected to the upper ends of the second fixed connecting plates.

[0010] Furthermore, the mounting chassis, shock-absorbing pads, second fixed connecting plate, and first fixed connecting plate are all provided with positioning connection holes, and fixing bolts are fixedly connected through each positioning connection hole. The protective outer cover, honeycomb thermal conductive shield, and side-opening detection module mounting shell are nested together.

[0011] Furthermore, elastic buckle protrusions are fixedly connected to both the upper and lower ends of the inner side of the data interface protective sleeve, and buckle positioning grooves are opened at both the upper and lower ends of the outer side of the data cable head protective sleeve. The buckle positioning grooves and elastic buckle protrusions engage with each other.

[0012] Furthermore, the upper end of the elastic buffer pad is movably connected to the lower end of the side-opening detection module mounting shell, the upper end of the pressure point ceramic actuator abuts against the lower end of the side-opening detection module mounting shell, and the upper end of the mounting chassis is fixedly connected with four right-angle limiting baffles, which surround the lower outer side of the side-opening detection module mounting shell.

[0013] The beneficial effects of this invention are as follows: This invention provides an online monitoring device for the electrical information of ultra-fast rail trains, comprising a mounting chassis, a protective cover, a foldable support bracket, a honeycomb-shaped thermal conductive shield, a semi-cylindrical exhaust hood, a pressure point ceramic actuator, a side-opening detection module mounting shell, a data interface protective sleeve, a data cable head protective sleeve, and a sensor module. When performing online monitoring of the electrical system of ultra-fast rail trains with speeds of 400 km / h and above, the device is first placed inside the train's electrical cabinet using the mounting chassis. The foldable support bracket is then unfolded and quickly reinforced using the anchor bolts. The sensor module is fixed to the carrier plate and placed inside the honeycomb-shaped thermal conductive shield. The monitoring data cable is connected, and the data cable head is embedded in the data cable head protective sleeve, positioned by the elastic buckle protrusion and buckle. The slotted engagement completes the sealing and protection of the interface. Then, during the high-speed operation of the train, the honeycomb thermal shielding cover simultaneously achieves omnidirectional electromagnetic shielding and efficient heat conduction for the sensor module. Together with the first exhaust fan, the intake fan, and the second exhaust fan, a three-dimensional ventilation channel quickly removes the heat inside the device. The pressure point ceramic actuator, together with the shock-absorbing pads and elastic buffer pads, actively counteracts the high-frequency vibration impact generated by the train. The four right-angle limit baffles prevent the side-opening detection module mounting shell from shifting. This enables the monitoring device to operate continuously and stably under extreme conditions such as strong electromagnetic interference, high-frequency vibration impact, and continuous high-load heating. It effectively reduces common faults such as data acquisition distortion, accidental equipment damage, and loose or detached data cables, thereby improving the reliability and maintenance efficiency of online monitoring of electrical information of ultra-fast rail trains. Attached Figure Description

[0014] To more clearly illustrate the technical solutions in the embodiments of the present invention or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings in the following description are only drawings of some embodiments of the present invention, and those skilled in the art can obtain other drawings based on these drawings. In addition, the drawings in the following description can be regarded as schematic diagrams and are not intended to limit the actual size of the product, the actual flow of the method, the actual timing of the signals, etc. involved in the embodiments of the present invention.

[0015] Figure 1 This is a structural diagram of an online monitoring device for electrical information of ultra-fast rail trains according to the present invention; Figure 2 This is a rear view of an online monitoring device for electrical information of ultra-fast rail trains according to the present invention; Figure 3 This is a structural diagram of a honeycomb-shaped thermally conductive shielding cover for an online monitoring device for electrical information of ultra-fast rail trains according to the present invention; Figure 4 This is a schematic diagram of the side-opening detection module mounting shell structure of an online monitoring device for electrical information of ultra-fast rail trains according to the present invention; Figure 5 This is a cross-sectional view of an online monitoring device for electrical information of ultra-fast rail trains according to the present invention; Figure 6 The present invention proposes Figure 5 Enlarged view of point A in the middle; Figure 7 This is a schematic diagram of the installation chassis structure of an online monitoring device for electrical information of ultra-fast rail trains according to the present invention.

[0016] In the picture: 1. Mounting chassis; 2. Protective cover; 3. Foldable support legs; 4. Semi-cylindrical exhaust hood; 5. First exhaust fan; 6. Second exhaust fan; 7. Intake fan; 8. First fixing plate; 9. Fixing bolts; 10. Honeycomb thermal conductive shield; 11. Second fixing plate; 12. Side-opening detection module mounting shell; 13. Carrier plate; 14. Sensor module; 15. Flexible anti-slip and wear-resistant pad; 16. Heat sink fins 17. Positioning bushing; 18. Data interface protective sleeve; 19. Elastic buckle protrusion; 20. Data cable end protective sleeve; 21. Buckle positioning groove; 22. Data cable docking protective sleeve; 23. Pressure point ceramic actuator; 24. Shock-absorbing pad; 25. Positioning connection hole; 26. Ventilation duct; 27. Lifting pad; 28. Elastic buffer pad; 29. ​​Four-corner right-angle limit stop plate; 30. Limiting shaft; 31. Anchor thread fixing hole. Detailed Implementation

[0017] The technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0018] The serial numbers assigned to components in this document, such as "first" and "second," are used only to distinguish the described objects and have no sequential or technical meaning. The terms "connection" and "linkage" used in this application, unless otherwise specified, include both direct and indirect connections (linkages). In the description of this invention, it should be understood that the terms "upper," "lower," "front," "rear," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," "outer," "clockwise," and "counterclockwise," etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are used only for the convenience of describing the invention and for simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on the invention.

[0019] In this invention, unless otherwise explicitly specified and limited, "above" or "below" the second feature can mean that the first feature is in direct contact with the second feature, or that the first feature is in indirect contact with the second feature through an intermediate medium. Furthermore, "above," "over," and "on top" of the second feature can mean that the first feature is directly above or diagonally above the second feature, or simply indicates that the first feature is at a higher horizontal level than the second feature. "Below," "below," and "under" the second feature can mean that the first feature is directly below or diagonally below the second feature, or simply indicates that the first feature is at a lower horizontal level than the second feature.

[0020] like Figures 1 to 7As shown in the figure, an online monitoring device for electrical information of ultra-fast rail trains provided by this embodiment of the invention includes a mounting chassis 1, which serves as the bottom support and mounting base for the entire device, providing a stable support platform for all internal components. A protective cover 2 is fitted onto the upper end of the mounting chassis 1, serving as the external protective shell of the device to isolate external dust, moisture, and mechanical collisions. A honeycomb-shaped thermal conductive shielding cover 10 is placed and connected to the upper end of the mounting chassis 1, serving as the core electromagnetic shielding and heat dissipation component of the device. Through the honeycomb structure, it simultaneously achieves omnidirectional electromagnetic shielding and efficient heat conduction for internal electronic components, solving the industry pain point of poor heat dissipation of traditional shielding structures. A semi-cylindrical exhaust hood 4 is connected through and fixed to the upper end of the honeycomb-shaped thermal conductive shielding cover 10, serving as a centralized exhaust hood. The airflow collection structure concentrates and exhausts the hot air inside the shielding cover. A side-opening detection module mounting shell 12 is movably connected to the upper end of the mounting chassis 1. The side-opening design facilitates quick inspection and replacement of the internal detection modules without disassembling the entire device. A carrier plate 13 is bolted to the upper end of the mounting chassis 1, serving as a dedicated support plate for the sensor modules and ensuring the flatness and stability of the sensor installation. A sensor module 14, the core functional component of the device, is threaded through and fixedly connected to the carrier plate 13, used to collect various operating parameters of the ultra-high-speed rail train's electrical system. Heat dissipation fins 16 are threaded through and fixedly connected to both ends of the inner side of the side-opening detection module mounting shell 12 to increase the heat dissipation area of ​​the shell and assist in cooling the internal components. A data interface protective sleeve 18 is connected and fixedly inserted to the lower end of the inner side of the side-opening detection module mounting shell 12. This serves as an external protective structure for the data interface, protecting it from impact and corrosion. A data cable head protective sleeve 20 is connected and slidably inserted to the inner side of the data interface protective sleeve 18, used to wrap and protect the data cable connector, preventing loosening and damage. Multiple data cable mating protective sleeves 22 are connected and fixedly inserted to one end of the data cable head protective sleeve 20, used to protect the connection between the data cable and the connector, preventing breakage due to long-term bending. A ventilation duct 26 is provided at the upper end of the mounting chassis 1, serving as an airflow channel within the device, guiding cold air through various heating components. Multiple pressure point ceramic actuators 23 are fixedly connected to the inner side of the ventilation duct 26. As the core component for active vibration isolation, it can counteract the high-frequency vibration impact generated by train operation in real time, protecting the internal precision electronic components. Multiple symmetrical first exhaust fans 5 are embedded on one side of the outer cover 2 to extract hot air from the device. Multiple symmetrical intake fans 7 are embedded on the other side of the outer cover 2 to draw in cool outside air, forming a transverse ventilation circuit. Multiple second exhaust fans 6 are embedded on the inner side of the semi-cylindrical exhaust hood 4 to concentrate and extract hot air from the honeycomb thermally conductive shield, forming a longitudinal exhaust circuit. This, combined with the transverse ventilation circuit, achieves three-dimensional heat dissipation. A lifting pad 27 is movably connected to the upper end of the mounting chassis 1 to raise the bottom height of the side-opening detection module mounting shell.A bottom ventilation gap is formed, and an elastic buffer pad 28 is embedded in the upper end of the raised pad 27 to provide passive cushioning support for the side-opening detection module mounting shell.

[0021] In one embodiment, symmetrical limiting shafts 30 are fixedly connected to both sides of the mounting base 1, serving as rotating support shafts for the foldable support legs. Symmetrical foldable support legs 3 are movably connected to both sides of the mounting base 1. When unfolded, they can increase the support area of ​​the device and improve installation stability. When folded, they can reduce the volume of the device, making it convenient for transportation and storage. One end of each foldable support leg 3 is fixedly connected to a positioning bushing 17. The positioning bushing 17 rotates and is sleeved and connected to the limiting shaft 30, enabling the foldable support leg to rotate freely around the limiting shaft.

[0022] In one embodiment, the lower ends of the mounting chassis 1 and the foldable support bracket 3 are both fixedly connected with flexible anti-slip and wear-resistant pads 15, which are used to increase the friction between the device and the mounting surface, prevent the device from sliding, and at the same time play a preliminary role in buffering and vibration isolation. One end of the foldable support bracket 3 and the flexible anti-slip and wear-resistant pad 15 connected thereto are both provided with anchor thread fixing holes 31, which are used to firmly fix the device to the mounting surface of the train electrical cabinet with bolts, so as to prevent the device from shifting when the train is running.

[0023] In one embodiment, both the carrier plate 13 and the sensor module 14 penetrate the upper surface of the honeycomb thermal conductive shield 10, so that the heat-generating part of the sensor module is directly exposed to the exhaust airflow. The upper ends of the carrier plate 13 and the sensor module 14 are located inside the semi-cylindrical exhaust hood 4, so that hot air can be directly drawn out by the second exhaust fan, which greatly improves the heat dissipation efficiency of the sensor module, while ensuring the electromagnetic shielding integrity of the honeycomb thermal conductive shield.

[0024] In one embodiment, the upper end of the mounting chassis 1 is movably connected to a plurality of symmetrical shock-absorbing pads 24, which are used to provide passive vibration isolation support for the honeycomb thermal conductive shield and absorb low-frequency vibration. The lower ends of both sides of the honeycomb thermal conductive shield 10 are fixedly connected to symmetrical second fixed connecting plates 11, which serve as mounting connecting ears for the honeycomb thermal conductive shield. The second fixed connecting plates 11 are movably connected to the upper ends of the shock-absorbing pads 24. The lower ends of both sides of the protective cover 2 are fixedly connected to symmetrical first fixed connecting plates 8, which serve as mounting connecting ears for the protective cover. The first fixed connecting plates 8 are movably connected to the upper ends of the second fixed connecting plates 11, thereby realizing the layered stacking connection of the protective cover, the honeycomb thermal conductive shield and the mounting chassis.

[0025] In one embodiment, the mounting chassis 1, the shock-absorbing pads 24, the second fixed connecting plate 11, and the first fixed connecting plate 8 are all provided with positioning connection holes 25 for aligning the installation positions of each layer of components. Each positioning connection hole 25 is fixedly connected with a fixing bolt 9 to fasten each layer of components into a whole. The outer cover 2, the honeycomb thermal conductive shield 10, and the side-opening detection module mounting shell 12 are nested together to form a three-layer protective structure from the outside to the inside, thereby realizing external mechanical protection, electromagnetic shielding protection, and internal component protection in sequence.

[0026] In one embodiment, elastic buckle protrusions 19 are fixedly connected to both the upper and lower ends of the inner side of the data interface protective sleeve 18, and buckle positioning grooves 21 are provided on both the upper and lower ends of the outer side of the data cable head protective sleeve 20. The buckle positioning grooves 21 and the elastic buckle protrusions 19 engage with each other to realize the quick disassembly and assembly and secure fixation of the data cable head protective sleeve without the need for any tools, and at the same time, it can prevent the data cable head from loosening and falling off during vibration.

[0027] In one embodiment, the upper end of the elastic buffer pad 28 is movably connected to the lower end of the side-opening detection module mounting shell 12, providing passive buffer support for the side-opening detection module mounting shell and absorbing low-frequency vibrations. The upper end of the pressure point ceramic actuator 23 abuts against the lower end of the side-opening detection module mounting shell 12, and can generate a reverse force in real time according to the vibration signal to actively counteract high-frequency vibration impacts. In conjunction with the elastic buffer pad, it achieves a combined active and passive vibration isolation effect. The upper end of the mounting chassis 1 is fixedly connected with four right-angle limiting baffles 29, which surround the lower outer side of the side-opening detection module mounting shell 12 to limit the horizontal displacement of the side-opening detection module mounting shell and prevent it from shifting during vibration. The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the present invention should be included within the protection scope of the present invention.

Claims

1. An online monitoring device for electrical information of ultra-fast rail trains, comprising a mounting chassis (1), characterized in that: A protective cover (2) is fitted onto the upper end of the mounting chassis (1). A honeycomb-shaped thermal shield (10) is placed and connected to the upper end of the mounting chassis (1). A semi-cylindrical exhaust hood (4) is connected through and fixed to the upper end of the honeycomb-shaped thermal shield (10). A side-opening detection module mounting shell (12) is movably connected to the upper end of the mounting chassis (1). A carrier plate (13) is fixed to the upper end of the mounting chassis (1) by bolts. A sensor module (14) is connected through and fixed to the carrier plate (13). Heat dissipation fins (16) are connected through and fixed to both ends of the inner side of the side-opening detection module mounting shell (12). A data interface protective sleeve (18) is connected through and fixed to the lower end of the inner side of the side-opening detection module mounting shell (12). The inner side of the mounting base (1) is slidably connected to a data cable head protective sleeve (20). One end of the data cable head protective sleeve (20) is connected to multiple data cable docking protective sleeves (22). The upper end of the mounting base (1) is provided with a ventilation duct (26). The inner side of the ventilation duct (26) is fixedly connected to multiple pressure point ceramic actuators (23). One side of the outer side of the protective cover (2) is embedded with multiple symmetrical first exhaust fans (5). The other side of the outer side of the protective cover (2) is embedded with multiple symmetrical air intake fans (7). The inner side of the semi-cylindrical exhaust hood (4) is embedded with multiple second exhaust fans (6). The upper end of the mounting base (1) is movably connected to a lifting pad (27). The upper end of the lifting pad (27) is embedded with an elastic buffer pad (28).

2. The online monitoring device for electrical information of ultra-high-speed rail trains according to claim 1, characterized in that: The mounting chassis (1) is fixedly connected to symmetrical limiting shafts (30) on both sides, and symmetrical foldable support legs (3) are movably connected to both sides of the mounting chassis (1). One end of each foldable support leg (3) is fixedly connected to a positioning bushing (17), and each positioning bushing (17) rotates and is sleeved and connected to the limiting shaft (30).

3. The online monitoring device for electrical information of ultra-fast rail trains according to claim 2, characterized in that: The lower ends of the mounting base (1) and the foldable support bracket (3) are both fixedly connected with flexible anti-slip and wear-resistant pads (15). One end of the foldable support bracket (3) and the flexible anti-slip and wear-resistant pad (15) connected thereto are both provided with anchor thread fixing holes (31).

4. The online monitoring device for electrical information of ultra-fast rail trains according to claim 1, characterized in that: The carrier plate (13) and the sensor module (14) both penetrate the upper surface of the honeycomb thermal shield (10), and the upper ends of the carrier plate (13) and the sensor module (14) are located inside the semi-cylindrical exhaust hood (4).

5. The online monitoring device for electrical information of ultra-fast rail trains according to claim 1, characterized in that: The upper end of the mounting chassis (1) is movably connected to a plurality of symmetrical shock-absorbing pads (24). The lower ends of both sides of the honeycomb thermal conductive shield (10) are fixedly connected to symmetrical second fixed connecting plates (11). The second fixed connecting plates (11) are movably connected to the upper end of the shock-absorbing pads (24). The lower ends of both sides of the protective cover (2) are fixedly connected to symmetrical first fixed connecting plates (8). The first fixed connecting plates (8) are movably connected to the upper end of the second fixed connecting plates (11).

6. The online monitoring device for electrical information of ultra-fast rail trains according to claim 5, characterized in that: The mounting chassis (1), shock-absorbing pads (24), second fixed connecting plate (11) and first fixed connecting plate (8) are all provided with positioning connection holes (25), and fixing bolts (9) are fixedly connected through the positioning connection holes (25). The protective outer cover (2), honeycomb heat-conducting shield (10) and side-opening detection module mounting shell (12) are nested together.

7. The online monitoring device for electrical information of ultra-fast rail trains according to claim 1, characterized in that: The upper and lower ends of the inner side of the data interface protective sleeve (18) are fixedly connected with elastic buckle protrusions (19), and the upper and lower ends of the outer side of the data cable head protective sleeve (20) are provided with buckle positioning grooves (21), and the buckle positioning grooves (21) and elastic buckle protrusions (19) are engaged.

8. The online monitoring device for electrical information of ultra-fast rail trains according to claim 1, characterized in that: The upper end of the elastic buffer pad (28) is movably connected to the lower end of the side-opening detection module mounting shell (12), the upper end of the pressure point ceramic actuator (23) abuts against the lower end of the side-opening detection module mounting shell (12), and the upper end of the mounting chassis (1) is fixedly connected with a four-corner right-angle limiting baffle (29), which surrounds the lower outer side of the side-opening detection module mounting shell (12).

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