An arc-shaped track door system for an exhibition hall

Abstract

The utility model discloses an arc track door system for exhibition hall belongs to automatic door technical field, the utility model designs arc track door system including double -shaft track system, double -shaft track system is coupled in the hoisting steel frame below through adjustable track hoisting fastener, the mobile door body frame includes first door body and second door body, is respectively symmetrical coupling in double -shaft track system below, and can make the closing state of two door bodies with the opposite movement below double -shaft track system to form two door body's opening state, strengthen type dragon formula arc double -track frame in double -shaft track system, arc line track promotes operation smoothness, and lightweight design reduces to the top surface load -bearing requirement, adapts to more building structure, and the modular design makes the maintenance convenient, and the practicality is strong.

Description

Technical Field

[0001] This utility model relates to the field of automatic door technology, specifically to an arc-shaped track door system for exhibition halls. Background Technology

[0002] While existing large exhibition hall door systems (such as automatic sliding doors, folding doors, or lifting doors) can meet basic functional requirements, they still have the following technical shortcomings in terms of security, traffic efficiency, and operation and maintenance costs:

[0003] 1. Insufficient security

[0004] Risk of pinching or collision: Traditional infrared or ultrasonic sensors have blind spots (such as for short children or wheelchairs) and response delays, which may cause the door to fail to stop in time.

[0005] Poor structural stability: Some lifting doors adopt a single-point suspension design, which is prone to track deformation or door detachment under strong wind load (≥800Pa).

[0006] 2. Low traffic efficiency

[0007] Low space utilization: The maximum passage width of a single sliding door is usually ≤2m, which can easily cause congestion during peak hours; while the joint components of folding doors (such as hinges) require frequent maintenance due to mechanical wear, further reducing availability.

[0008] Automation delay: Existing sensor doors rely on a single trigger signal (such as a geomagnetic coil), with a narrow sensitivity adjustment range (0.1~1.0m), resulting in an opening / closing delay (typical value ≥3 seconds).

[0009] 3. Scalability and cost issues

[0010] Poor logistics adaptability: The standard door width (≤4m) cannot meet the passage requirements of large exhibits (such as sculptures and equipment), and the door frame or auxiliary structure needs to be temporarily removed, which takes time (≥2 hours).

[0011] High maintenance costs: Non-modular design of drive components (such as hydraulic revolving doors) has a high failure rate, and replacement requires complete disassembly; the mechanical wear cycle of tracks and motors is short (average ≤6 months), and maintenance costs account for more than 30% of the total cost (Source: Industry White Paper "2023 Exhibition Hall Facility Report"). Utility Model Content

[0012] To address the aforementioned issues, this utility model discloses an arc-shaped track door system for exhibition halls. Its simple structural layout, modular design, and bidirectional interactive drive, along with the use of non-contact photoelectric sensors, enhance the reliability of motor stroke detection and reduce the risk of strong electrical interference. This not only makes installation more convenient and efficient but also results in a simpler and more compact overall design. Furthermore, it greatly facilitates subsequent inspection and maintenance, reducing operating costs.

[0013] To achieve the above objectives, the technical solution of this utility model is as follows:

[0014] An arc-shaped track door system for exhibition halls has a symmetrical structure. The arc-shaped track door system includes a hoisting steel frame, a movable door frame, a dual-axis track system, and adjustable track hoisting fasteners. The dual-axis track system is connected to the lower part of the hoisting steel frame through the adjustable track hoisting fasteners. The movable door frame includes a first door and a second door, which are symmetrically connected to the lower part of the dual-axis track system. They can move towards each other to form a closed state and move away from each other to form an open state.

[0015] As a further improvement of this utility model, the dual-axis track system has a symmetrical structure on both sides. Each side includes a reinforced dragon-shaped arc-shaped dual-track frame, a straight-line dual-track sliding bridge, an arc-shaped dual-track trolley, and a limiting plate. The reinforced dragon-shaped arc-shaped dual-track frames on both sides are fixedly connected as one unit, and the cross-section is square. The two arc-shaped dual-track trolleys are respectively installed in the two reinforced dragon-shaped arc-shaped dual-track frames. The first door body is provided with two first door body connecting columns, and the second door body is provided with two second door body connecting columns. The upper ends of the two straight-line dual-track sliding bridges are respectively installed in the two arc-shaped dual-track frames. On the double-rail trolley, the lower ends of one of the linear double-rail sliding bridges are connected to two first door body connecting columns, and the lower ends of the other linear double-rail sliding bridge are connected to two second door body connecting columns. When the two arc-shaped double-rail trolleys move in opposite directions on the two reinforced dragon-type arc-shaped double-rail frames, they respectively drive the two linear double-rail sliding bridges to move in opposite directions, thereby driving the first door body and the second door body to move in opposite directions. The two limiting plates are symmetrically installed below the reinforced dragon-type arc-shaped double-rail frames to limit the reciprocating range of the two arc-shaped double-rail trolleys.

[0016] As a further improvement of this utility model, the limiting plate includes an inner limiting plate and an outer limiting plate.

[0017] The reinforced dragon-shaped arc-shaped double-track frame includes a track top plate, N track box keels, an inner track edging, N track reinforcing plates, two track plates, an arc-shaped inner rack, and an outer track edging, where N is an integer and ≥4.

[0018] The track box keel is U-shaped and vertically arranged at equal intervals in the horizontal direction. Each keel is connected to two track plates at the front and back, respectively. The two track plates are fixed to the inner and outer limiting plates, respectively. An arc-shaped internal toothed rack is embedded within each of the two track plates. A track top plate, an inner track edge, and an outer track edge are fixed to the top and front and back of the N track box keels, respectively. N track reinforcing plates are correspondingly connected to the bottom of the N track box keels, forming a square structure of the reinforced dragon-shaped arc-shaped double track frame.

[0019] The linear double-rail sliding bridge includes a first stepper motor, a longitudinal axis motor support plate, a guide rail connecting bridge, two door assembly connecting plates, two door body connecting components, and two U-shaped sliders. The first stepper motor is mounted on the guide rail connecting bridge via the longitudinal axis motor support plate. The two U-shaped sliders are respectively mounted below both ends of the guide rail connecting bridge via the two door assembly connecting plates. The two U-shaped sliders have internal grooves. The shaft end of the first stepper motor is equipped with a first gear. The two door body connecting components are respectively mounted below the two door assembly connecting plates and adjacent to the U-shaped sliders.

[0020] The arc-shaped double-rail trolley includes a support body, a drive wheel frame, a drive gear, a load-bearing wheel seat, a load-bearing wheel, a longitudinal rack, a longitudinal rack bracket, a limit switch bracket, a T-shaped slide rail, a guide wheel frame, guide wheels, a limit switch bracket mounting slot, and a second stepper motor. The second stepper motor is connected to one side of the support body via the drive wheel frame. The drive gear is mounted on the shaft end of the second stepper motor and meshes with the arc-shaped internal rack. There are three guide wheels, all mounted on both sides of the support body via guide wheel frames, two of which are guide wheels. The wheels are symmetrically distributed on both sides of the rear end of the support body. A guide wheel and the drive gear are symmetrically distributed on both sides of the front end of the support body, and both are in contact with the inner surfaces of the two track plates. There are 2M load-bearing wheels, which are paired and symmetrically installed on the front and rear end faces of the support body through load-bearing wheel seats, and in contact with the upper surface of the two track plates. Here, M is an integer and ≥2. There are two T-shaped slide rails, which are symmetrically installed on the upper surface of the support body and are adapted to the sliding grooves opened inside the two U-shaped sliders.

[0021] Both the first and second door bodies are connected to the two guide rail connecting bridges via door body connectors that pass through the two supporting bodies.

[0022] The longitudinal rack is mounted in the limit switch bracket via a longitudinal rack bracket. The limit switch bracket mounting slot is formed on the upper surface of the support body. The limit switch bracket is placed in the limit switch bracket mounting slot. The longitudinal rack meshes with the first gear. The first stepper motor drives the first gear, thereby causing the support body to reciprocate back and forth, and then causing the door to reciprocate back and forth. The second stepper motor drives the drive gear, causing the arc-shaped double-rail trolley to move, thereby causing the linear double-rail sliding bridge mounted on the arc-shaped double-rail trolley to move, and then causing the first door and the second door connected to the linear double-rail sliding bridge via the door connecting piece to move.

[0023] As a further improvement of this utility model, the ends of the arc-shaped double-rail trolley are equipped with guardrails to limit the range of the two straight double-rail sliding bridges moving towards each other.

[0024] As a further improvement of this utility model, all of the installation methods are detachable installation methods.

[0025] As a further improvement of this utility model, the stroke sensors of both the second stepper motor and the first stepper motor are non-contact photoelectric sensors.

[0026] As a further improvement of this utility model, the arc-shaped double-rail trolley also includes a drag chain fixing plate for fixing cables.

[0027] The beneficial effects of this utility model are as follows:

[0028] 1. This application designs a reinforced dragon-shaped arc-shaped double-track frame. The arc track improves the smoothness of operation, and the lightweight design reduces the load-bearing requirements on the top surface, making it suitable for more building structures.

[0029] 2. This application features a modular design for the core component, the dual-axis track system, comprising four modules: a reinforced dragon-shaped arc-shaped dual-track frame, a straight dual-track sliding bridge, an arc-shaped dual-track trolley, and a limiting plate. This simplifies the installation and maintenance process and reduces long-term operating costs.

[0030] 3. The movable door frame of this application is divided into a first door and a second door. The two doors can interact in a two-way (facing each other / backwards) mode. Depending on the needs of the applicable exhibition hall, one door can be opened or closed at a time. For example, when there is a large flow of people, the doors can be opened and closed in both directions, which enhances the fun and improves the technological feel and attractiveness of the exhibition hall.

[0031] 4. All drive motors in this application use non-contact photoelectric sensors to avoid interference and ensure long-term stable operation.

[0032] In summary, the arc-shaped track door system for exhibition halls of this utility model solves the pain points of existing traditional exhibition hall doors in terms of space, maintenance costs, flexibility, interactivity, security and reliability, making it more in line with the high requirements of modern exhibition halls for intelligence, lightweight and user experience, and has broad application prospects. Attached Figure Description

[0033] Figure 1 This is a schematic diagram of the overall structure of the arc-shaped track door system for exhibition halls according to this utility model;

[0034] Figure 2 for Figure 1 A schematic diagram of its decomposition;

[0035] Figure 3 for Figure 2 Exploded view of the dual-axis track system;

[0036] Figure 4 for Figure 3 Exploded structural diagram of a medium-strengthened dragon-shaped arc-shaped double-track frame;

[0037] Figure 5 for Figure 3 Schematic diagram of the exploded structure of a straight double-track sliding bridge;

[0038] Figure 6 for Figure 3 Exploded view of the structure of a medium-arc double-rail trolley;

[0039] List of identifiers in attached diagrams:

[0040] 1. Hoisting steel frame; 2. Moving gate frame; 2-1. First gate body; 2-1-1. First gate body connecting column; 2-2. Second gate body; 2-2-1. Second gate body connecting column; 3. Dual-axis track system; 3-1. Reinforced dragon-type arc-shaped double track frame; 3-1-1. Track top plate; 3-1-2. Track box keel; 3-1-3. Track inner edging; 3-1-4. Track reinforcing plate; 3-1-5. Track plate; 3-1-6. Arc-shaped inner rack; 3-1-7. Track outer edging; 3-2. Straight double-track sliding bridge; 3-2-1. First stepper motor; 3-2-2. Longitudinal axis motor support plate; 3-2-3. Guide rail connecting bridge; 3-2-4. Gate assembly connecting plate; 3-2-5. U-shaped slider; 3-2-6. First... Gears; 3-2-7, Door connecting parts; 3-3, Arc-shaped double-rail trolley; 3-3-1, Guardrail; 3-3-2, Support body; 3-3-3, Drive wheel frame; 3-3-4, Drive gear; 3-3-5, Load-bearing wheel seat; 3-3-6, Load-bearing wheel; 3-3-7, Longitudinal rack; 3-3-8, Longitudinal rack bracket; 3-3-9, Limit switch bracket; 3-3-10, T-shaped slide rail; 3-3-11, Guide wheel frame; 3-3-12, Guide wheel; 3-3-13, Limit switch bracket mounting slot; 3-3-14, Second stepper motor; 3-3-15, Cable drag chain fixing plate; 3-4, Limit plate; 3-4-1, Inner limit plate; 3-4-2, Outer limit plate; 4, Adjustable track hoisting fasteners. Detailed Implementation

[0041] The present invention will be further explained below with reference to the accompanying drawings and specific embodiments. It should be understood that the following specific embodiments are only used to illustrate the present invention and are not intended to limit the scope of the present invention.

[0042] like Figures 1-2 As shown, the arc-shaped track door system for exhibition halls of this utility model has a symmetrical structure. The arc-shaped track door system includes a hoisting steel frame 1, a movable door frame 2, a dual-axis track system 3, and adjustable track hoisting fasteners 4. The dual-axis track system 3 is connected to the lower part of the hoisting steel frame 1 through the adjustable track hoisting fasteners 4. The movable door frame 2 includes a first door 2-1 and a second door 2-2, which are symmetrically connected to the lower part of the dual-axis track system 3, and can move towards each other to form a closed state of the two doors, and move away from each other to form an open state of the two doors.

[0043] like Figures 3-6As shown, the dual-axis track system 3 has a symmetrical structure on both sides. Each side includes a reinforced dragon-shaped arc-shaped dual-track frame 3-1, a straight-line dual-track sliding bridge 3-2, an arc-shaped dual-track trolley 3-3, and a limiting plate 3-4. The reinforced dragon-shaped arc-shaped dual-track frames 3-1 on both sides are fixedly connected as one unit, and the cross-section is square. The two arc-shaped dual-track trolleys 3-3 are respectively installed inside the two reinforced dragon-shaped arc-shaped dual-track frames 3-1. The first door body 2-1 is provided with two first door body connecting columns 2-1-1, and the second door body 2-2 is provided with two second door body connecting columns 2-2-1. The two straight-line dual-track sliding bridges 3-2... The upper ends are respectively installed on the two arc-shaped double-track trolleys 3-3. The lower ends of one of the linear double-track sliding bridges 3-2 are connected to the two first door body connecting columns 2-1-1, and the lower ends of the other linear double-track sliding bridge 3-2 are connected to the two second door body connecting columns 2-2-1. When the two arc-shaped double-track trolleys 3-3 move in opposite directions on the two reinforced dragon-type arc-shaped double-track frames 3-1, they respectively drive the two linear double-track sliding bridges 3-2 to move in opposite directions, thereby driving the first door body 2-1 and the second door body 2-2 to move in opposite directions. The two limiting plates 3-4 are symmetrically installed below the reinforced dragon-type arc-shaped double-track frame 3-1 to limit the reciprocating range of the two arc-shaped double-track trolleys 3-3.

[0044] The limiting plate 3-4 includes an inner limiting plate 3-4-1 and an outer limiting plate 3-4-2.

[0045] The reinforced dragon-shaped arc-shaped double track frame 3-1 includes a track top plate 3-1-1, N track box keels 3-1-2, a track inner edge 3-1-3, N track reinforcing plates 3-1-4, two track plates 3-1-5, an arc-shaped inner rack 3-1-6, and a track outer edge 3-1-7, where N is an integer and ≥4.

[0046] The track box keel 3-1-2 is U-shaped and arranged vertically at equal intervals in the horizontal direction. It is connected to two track plates 3-1-5 at the front and back respectively. The two track plates 3-1-5 are fixed to the inner limiting plate 3-4-1 and the outer limiting plate 3-4-2 respectively. An arc-shaped inner toothed rack 3-1-6 is embedded inside each of the two track plates 3-1-5. A track top plate 3-1-1, an inner track edge 3-1-3, and an outer track edge 3-1-7 fix the N track box keels 3-1-2 at the top and front and back respectively. N track reinforcing plates 3-1-4 are correspondingly connected to the bottom of the N track box keels 3-1-2 to form the square structure of the reinforced dragon-shaped arc-shaped double track frame 3-1.

[0047] The linear double-rail sliding bridge 3-2 includes a first stepper motor 3-2-1, a longitudinal axis motor support plate 3-2-2, a guide rail connecting bridge 3-2-3, two door assembly connecting plates 3-2-4, two door body connecting parts 3-2-7, and two U-shaped sliders 3-2-5. The first stepper motor 3-2-1 is mounted on the guide rail connecting bridge 3-2-3 via the longitudinal axis motor support plate 3-2-2. The two U-shaped sliders 3-2-5 are respectively mounted below the two ends of the guide rail connecting bridge 3-2-3 via the two door assembly connecting plates 3-2-4. The two U-shaped sliders 3-2-5 have internal grooves. The shaft end of the first stepper motor 3-2-1 is provided with a first gear 3-2-6. The two door body connecting parts 3-2-7 are respectively mounted below the two door assembly connecting plates 3-2-4 and adjacent to the U-shaped sliders 3-2-5.

[0048] The arc-shaped double-rail trolley 3-3 includes a support body 3-3-2, a drive wheel frame 3-3-3, a drive gear 3-3-4, a load-bearing wheel seat 3-3-5, a load-bearing wheel 3-3-6, a longitudinal rack 3-3-7, a longitudinal rack bracket 3-3-8, a limit switch bracket 3-3-9, a T-shaped slide rail 3-3-10, a guide wheel frame 3-3-11, a guide wheel 3-3-12, a limit switch bracket mounting slot 3-3-13, and a second stepper motor 3-3-14. The second stepper motor 3-3-14 is driven by the drive wheel frame 3-3-3. Connected to one side of the support body 3-3-2, the drive gear 3-3-4 is mounted on the shaft end of the second stepper motor 3-3-14 and meshes with the arc-shaped internal rack 3-1-6. Three guide wheels 3-3-12 are mounted on both sides of the support body 3-3-2 via guide wheel brackets 3-3-11. Two guide wheels 3-3-12 are symmetrically distributed at the rear ends of both sides of the support body 3-3-2, and one guide wheel 3-3-12 and the drive gear 3-3-4 are symmetrically distributed at the front ends of both sides of the support body 3-3-2, and all contact the inner surfaces of the two track plates 3-1-5. There are 2M load-bearing wheels 3-3-6, all connected via load-bearing wheel seats 3-3-5. The T-shaped slide rails 3-3-10 are installed in pairs and symmetrically on the front and rear end faces of the support body 3-3-2, and in contact with the upper end faces of the two track plates 3-1-5, where M is an integer and ≥2. Two T-shaped slide rails 3-3-10 are symmetrically installed on the upper surface of the support body 3-3-2, and are fitted with grooves inside the two U-shaped sliders 3-2-5.

[0049] Both the first door body 2-1 and the second door body 2-2 are connected to the two guide rail connecting bridges 3-2-3 via two door body connecting pieces 3-2-7 passing through the two supporting bodies 3-3-2.

[0050] The longitudinal rack 3-3-7 is mounted in the limit switch bracket 3-3-9 via the longitudinal rack bracket 3-3-8. The limit switch bracket mounting groove 3-3-13 is formed on the upper surface of the support body 3-3-2. The limit switch bracket 3-3-9 is placed in the limit switch bracket mounting groove 3-3-13. The longitudinal rack 3-3-7 meshes with the first gear 3-2-6. The first stepper motor 3-2-1 drives the first gear 3-2-6, thereby causing the support body 3-3-2 to reciprocate back and forth, and then causing the door to reciprocate back and forth. The second stepper motor 3-3-14 drives the drive gear 3-3-4, causing the arc-shaped double-rail trolley 3-3 to move, thereby driving the linear double-rail sliding bridge 3-2 mounted on the arc-shaped double-rail trolley 3-3. The movement then drives the first door 2-1 and the second door 2-2, which are connected to the linear double-rail sliding bridge 3-2 via the door body connector 3-2-7, to move.

[0051] The arc-shaped double-rail trolley 3-3 is equipped with a guardrail 3-3-1 at its end, which is used to limit the range of the two straight double-rail sliding bridges 3-2 moving towards each other.

[0052] All of the installation methods are detachable installation methods.

[0053] The stroke sensors for the second stepper motor 3-3-14 and the first stepper motor 3-2-1 are both non-contact photoelectric sensors.

[0054] The arc-shaped double-rail trolley (3-3) also includes a drag chain fixing plate 3-3-15 for fixing cables.

[0055] The beneficial effects of this utility model are as follows:

[0056] 1. This application designs a reinforced dragon-shaped arc-shaped double-track frame. The arc track improves the smoothness of operation, and the lightweight design reduces the load-bearing requirements on the top surface, making it suitable for more building structures.

[0057] 2. This application adopts a modular design for the core component, the dual-axis track system 3, which is divided into four modules: a reinforced dragon-type arc-shaped dual-track frame 3-1, a straight dual-track sliding bridge 3-2, an arc-shaped dual-track trolley 3-3, and a limiting plate 3-4. This simplifies the installation and maintenance process and reduces long-term operating costs.

[0058] 3. The movable door frame 2 of this application is divided into a first door 2-1 and a second door 2-2. The two doors can interact in a two-way (facing each other / backwards) mode. Depending on the needs of the applicable exhibition hall, one door can be opened or closed at a time. For example, when there is a large flow of people, the doors can be opened and closed in both directions, which enhances the fun and improves the technological feel and attractiveness of the exhibition hall.

[0059] 4. All drive motors in this application use non-contact photoelectric sensors to avoid interference and ensure long-term stable operation.

[0060] In summary, the arc-shaped track door system for exhibition halls of this utility model solves the pain points of existing traditional exhibition hall doors in terms of space, maintenance costs, flexibility, interactivity, security and reliability, making it more in line with the high requirements of modern exhibition halls for intelligence, lightweight and user experience, and has broad application prospects.

[0061] It should be noted that the above content merely illustrates the technical concept of this utility model and cannot be used to limit the scope of protection of this utility model. For those skilled in the art, several improvements and modifications can be made without departing from the principle of this utility model, and all such improvements and modifications fall within the scope of protection of the claims of this utility model.

Claims

1. An arc-shaped track door system for an exhibition hall, in a left-right symmetrical structure, characterized in that, The arc-shaped track door system includes a hoisting steel frame (1), a movable door frame (2), a dual-axis track system (3), and adjustable track hoisting fasteners (4). The dual-axis track system (3) is connected to the hoisting steel frame (1) below through the adjustable track hoisting fasteners (4). The movable door frame (2) includes a first door (2-1) and a second door (2-2), which are symmetrically connected to the dual-axis track system (3) below. They can move towards each other below the dual-axis track system (3) to form a closed state of the two doors, and move away from each other to form an open state of the two doors.

2. The curved track door system for an exhibition hall according to claim 1, wherein, The dual-axis track system (3) has a symmetrical structure on both sides. Each side includes a reinforced dragon-shaped arc-shaped dual-track frame (3-1), a straight-line dual-track sliding bridge (3-2), an arc-shaped dual-track trolley (3-3), and a limiting plate (3-4). The reinforced dragon-shaped arc-shaped dual-track frames (3-1) on both sides are fixed together and have a square cross-section. The two arc-shaped dual-track trolleys (3-3) are respectively installed inside the two reinforced dragon-shaped arc-shaped dual-track frames (3-1). The first door body (2-1) is provided with two first door body connecting columns (2-1-1), and the second door body (2-2) is provided with two second door body connecting columns (2-2-1). The two straight-line dual-track sliding bridges (3-2) The upper ends are respectively installed on the two arc-shaped double-rail trolleys (3-3). The lower ends of one of the linear double-rail sliding bridges (3-2) are connected to the two first door body connecting columns (2-1-1), and the lower ends of the other linear double-rail sliding bridge (3-2) are connected to the two second door body connecting columns (2-2-1). When the two arc-shaped double-rail trolleys (3-3) move back and forth on the two reinforced dragon-type arc-shaped double-rail frames (3-1), they respectively drive the two linear double-rail sliding bridges (3-2) to move back and forth, thereby driving the first door body (2-1) and the second door body (2-2) to move back and forth. The two limiting plates (3-4) are symmetrically installed below the reinforced dragon-type arc-shaped double-rail frame (3-1) to limit the reciprocating range of the two arc-shaped double-rail trolleys (3-3).

3. A curved track door system for an exhibition hall according to claim 2, characterized in that, The limiting plate (3-4) includes an inner limiting plate (3-4-1) and an outer limiting plate (3-4-2). The reinforced dragon-shaped arc-shaped double-track frame (3-1) includes a track top plate (3-1-1), N track box keels (3-1-2), an inner track edging (3-1-3), N track reinforcing plates (3-1-4), two track plates (3-1-5), an arc-shaped inner rack (3-1-6), and an outer track edging (3-1-7), where N is an integer and ≥4. The track box keel (3-1-2) is U-shaped and arranged vertically at equal intervals in the horizontal direction. It is connected to two track plates (3-1-5) at the front and back respectively. The two track plates (3-1-5) are fixed to the inner limiting plate (3-4-1) and the outer limiting plate (3-4-2) respectively. An arc-shaped inner toothed rack (3-1-6) is embedded inside each of the two track plates (3-1-5). A track top plate (3-1-1), an inner track edge (3-1-3), and an outer track edge (3-1-7) fix the N track box keels (3-1-2) at the top and front and back respectively. N track reinforcing plates (3-1-4) are connected to the N track box keels (3-1-2) at the bottom respectively, forming a square structure of the reinforced dragon-shaped arc-shaped double track frame (3-1). The linear double-rail sliding bridge (3-2) includes a first stepper motor (3-2-1), a longitudinal axis motor support plate (3-2-2), a guide rail connecting bridge (3-2-3), two door assembly connecting plates (3-2-4), two door body connecting parts (3-2-7), and two U-shaped sliders (3-2-5). The first stepper motor (3-2-1) is mounted on the guide rail connecting bridge (3-2-3) via the longitudinal axis motor support plate (3-2-2). The two U-shaped sliders (3-2-5) are respectively mounted below the two ends of the guide rail connecting bridge (3-2-3) via the two door assembly connecting plates (3-2-4). The two U-shaped sliders (3-2-5) have grooves inside. The first stepper motor (3-2-1) has a first gear (3-2-6) at the end of its shaft. The two door body connecting parts (3-2-7) are respectively installed below the two door assembly connecting plates (3-2-4) and adjacent to the U-shaped sliders (3-2-5). The arc-shaped double-rail trolley (3-3) includes a support body (3-3-2), a drive wheel frame (3-3-3), a drive gear (3-3-4), a load-bearing wheel seat (3-3-5), a load-bearing wheel (3-3-6), a longitudinal rack (3-3-7), a longitudinal rack bracket (3-3-8), a limit switch bracket (3-3-9), a T-shaped slide rail (3-3-10), a guide wheel frame (3-3-11), a guide wheel (3-3-12), a limit switch bracket mounting slot (3-3-13), and a second stepper motor (3-3-14). The second stepper motor (3-3-14) is driven by the drive wheel frame (3-3-3). The drive gear (3-3-4) is connected to one side of the support body (3-3-2), mounted on the shaft of the second stepper motor (3-3-14), and meshes with the arc-shaped internal rack (3-1-6). Three guide wheels (3-3-12) are mounted on both sides of the support body (3-3-2) via guide wheel brackets (3-3-11). Two guide wheels (3-3-12) are symmetrically distributed at the rear ends of both sides of the support body (3-3-2), and one guide wheel (3-3-12) and the drive gear (3-3-4) are symmetrically distributed at the front ends of both sides of the support body (3-3-2), and both are in contact with the inner surfaces of the two track plates (3-1-5). There are 2M load-bearing wheels (3-3-6), all mounted via load-bearing wheel seats (3-3-5). The slide rails (3-3-10) are installed in pairs and symmetrically on the front and rear end faces of the support body (3-3-2), and in contact with the upper end faces of the two track plates (3-1-5), where M is an integer and ≥2. There are two T-shaped slide rails (3-3-10), which are symmetrically installed on the upper surface of the support body (3-3-2) and are adapted to the sliding grooves opened inside the two U-shaped sliders (3-2-5). The first door body (2-1) and the second door body (2-2) are both connected to the two guide rail connecting bridges (3-2-3) through the two supporting bodies (3-3-2) via two door body connecting parts (3-2-7). The longitudinal rack (3-3-7) is mounted in the limit switch bracket (3-3-9) via the longitudinal rack bracket (3-3-8). The limit switch bracket mounting groove (3-3-13) is formed on the upper surface of the support body (3-3-2). The limit switch bracket (3-3-9) is placed in the limit switch bracket mounting groove (3-3-13). The longitudinal rack (3-3-7) meshes with the first gear (3-2-6). The first stepper motor (3-2-1) drives the first gear (3-2-6), thereby causing the support body (3-3-2) to reciprocate back and forth, and subsequently causing the door to reciprocate back and forth. The second stepper motor (3-3-14) drives the drive gear (3-3-4), causing the arc-shaped double-rail trolley (3-3) to move, thereby driving the linear double-rail sliding bridge (3-2) mounted on the arc-shaped double-rail trolley (3-3). The movement then drives the first door (2-1) and the second door (2-2) connected to the linear double-rail sliding bridge (3-2) via the door connector (3-2-7) to move.

4. A curved track door system for an exhibition hall according to claim 3, characterized in that The arc-shaped double-rail trolley (3-3) is equipped with guardrails (3-3-1) at its ends to limit the range of the two straight double-rail sliding bridges (3-2) moving towards each other.

5. A curved track door system for an exhibition hall according to claim 4, characterized in that The curved track door system used in the exhibition hall is installed using a detachable installation method.

6. A curved track door system for an exhibition hall according to claim 5, wherein The stroke sensors of the second stepper motor (3-3-14) and the first stepper motor (3-2-1) are both non-contact photoelectric sensors.

7. A curved track door system for an exhibition hall according to claim 6, characterized in that The arc-shaped double-rail trolley (3-3) also includes a drag chain fixing plate (3-3-15) for fixing cables.

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