A lifting and automatic opening and sealing device for subway entrance and exit gates

Abstract

The present invention provides a lifting and automatically opening sealing device for subway entrance and exit gates, belonging to the technical field of rail transit flood prevention equipment. The device comprises a drive motor, a self-locking screw lifter, a gate, a special-shaped guide groove, side sealing strips, and a bottom sealing strip. The drive motor controls the movement of the gate. The two ends of the gate are respectively located in two special-shaped guide grooves. The portion of the special-shaped guide groove located above the ground elevation is provided with a widened portion. The inner side wall of the widened portion is provided with a side sealing strip. The two side sealing strips and the bottom sealing strip form a U-shaped sealing structure. After the gate rises vertically along the special-shaped guide groove to above the ground elevation, it moves horizontally toward the widened portion, and the side of the gate is attached to the U-shaped sealing structure. After the gate rises synchronously into place, the present invention automatically switches from vertical displacement to horizontal displacement, squeezing the sealing strip to achieve sealing, thereby realizing the function of the gate synchronous rising and automatically opening sealing device.

Description

Technical Field

[0001] The present invention belongs to the technical field of rail transit flood prevention equipment, and in particular relates to a lifting and automatically opening sealing device for subway entrance and exit gates. Background Art

[0002] Currently, extreme weather events are becoming increasingly frequent around the world. Subway lines and stations at risk of flooding and waterlogging should be surveyed according to the "Technical Specifications for Urban Waterlogging Risk Surveys" (GB / T 39195-2020), and flood control gates should be installed at subway station entrances and exits with higher risks. Subway entrances and exits are key and challenging areas for flood prevention. Despite weather warnings during operation, station entrances and exits are often not sealed in advance for passenger convenience. When a dangerous situation arises, sealing entrances and exits is labor-intensive and inconvenient, making flooding a serious risk. Therefore, installing flood control gates at subway entrances and exits is an effective measure to prevent flooding in subway stations.

[0003] At present, the main flood prevention measures for subway entrances and exits in China are as follows:

[0004] 1. Traditional grille-type aluminum alloy water retaining device. Lightweight aluminum alloy grilles are inserted into the grooves of the columns on both sides and stacked to achieve flood control. For example, the Chinese utility model patent with authorization announcement number CN218150570U discloses a subway flood prevention door that also uses a similar water retaining device design. The device has a lightweight structure, but is insufficient in load-bearing capacity and has the risk of collapse under water pressure and other external forces. In addition, the sealing performance is poor. Holes for column installation are set on the ground, and slots are set on both sides, which has poor landscape integration; it is fully manually installed, which will occupy the storage space of station entrance and exit equipment on a daily basis.

[0005] 2. Hydraulic flap door system. A hydraulic flap door flips and presses against the door pier to achieve a seal. When not in operation, the entire door's large metal surface lies flat at the entrance or exit, which is not very slip-resistant and aesthetically pleasing. Furthermore, the puddle formed after the door flips poses a safety hazard for people to fall into. The hydraulic flap door system is driven by a hydraulic cylinder, which can fail in extremely cold weather and requires frequent maintenance.

[0006] 3. Lifting gates. An electric device is used to lift the gate. Lifting is controlled by an electrical sensor. Once the gate is raised and lowered into position, the locking device uses a latch to lock. Both the lifting and locking of this device are achieved using electrical terminals. For example, Chinese invention patent application publication number CN114215460A discloses a "Subway Flood Control Door Lifting Control System." This patent requires a large load-bearing civil engineering structure beam to be reserved at the top of the entrance and exit. The gate is lifted upward, and the ropes and lifting drive mechanism are exposed, resulting in poor aesthetics.

[0007] 4. Hidden lifting gate. For example, the Chinese invention patent with application publication number CN111058730A discloses a subway flood prevention door and its control method, which adopts a driving mechanism, a clamping mechanism, and a locking mechanism to respectively realize the three functions of gate lifting, sealing, and locking. The driving mechanism is used to drive the door frame to move up and down to realize the opening and closing of the door body; the clamping mechanism adopts a first driving member and a clamping assembly to drive the sealing cooperation between the door body and the frames on both sides; the locking mechanism adopts a second driving member and a locking assembly to drive the locking member to rotate to lock the relative position of the door body and the frame. In addition, its family patents also give a detailed description of its principles. For example, the Chinese utility model patent with authorization announcement number CN211397265U discloses a clamping mechanism and a subway flood prevention door, which describes that when the door body completes the opening action, the clamping mechanism acts to squeeze the seal between the door body and the frame to achieve sealing. Furthermore, Chinese utility model patent No. CN211598115U discloses a locking mechanism and a subway flood prevention door. It describes how, after the gate body is opened, a drive device activates the locking assembly. The locking assembly uses a set of cams to lock the gate body and frame, overcoming gravity through friction from the cams. The three functions of this device utilize different drive devices and actuators, and the execution sequence requires electrical control. This device, with its numerous components and complex structure, is prone to failure, resulting in poor reliability and inconvenience in daily operations and maintenance. This device is in practical use at the entrance and exit of Jinan Metro Line 2. It uses a hydraulic station as its power source, with multiple sets of different hydraulic cylinders as its drive terminals. The system utilizes numerous hydraulic components, such as control valves, hydraulic pipes, and relief valves, which take up space, require high precision, and are sensitive to high ambient temperatures. These components are prone to failure, making them unsuitable for use in extreme cold weather or for disaster prevention situations that occur only occasionally in decades, when equipment requires minimal actuation. Furthermore, the hydraulic system relies on electrical servo control, such as a PLC. A failure in the electrical control system disrupts gate lifting (including synchronization), locking, and clamping, resulting in severe mechanical interference. Summary of the Invention

[0008] In response to the technical problems existing in the prior art, the present invention provides a lifting device for subway entrance and exit gates with an automatic opening and sealing device. After the gate performs a vertical displacement action and rises to a position synchronously, the vertical displacement does not change, and the vertical displacement driving force is automatically converted into a horizontal displacement driving force. After the door body moves horizontally, the sealing strip is squeezed to achieve press sealing, realizing an integrated design of the gate rising and automatic sealing functions.

[0009] The technical solution adopted by the present invention is: a lifting and automatic opening sealing device for subway entrance and exit gates, including a driving motor, a self-locking screw elevator, a hollow main shaft, a rotating arm, a gate, a special-shaped guide groove, a side sealing strip and a bottom sealing strip, the driving motor is connected to the reducer, the reducer is connected to the synchronous shaft, the synchronous shaft is simultaneously connected to the hand-cranked device and two sets of self-locking screw elevators, a main shaft flange is fixed on the screw sleeve flange of the self-locking screw elevator, the main shaft flange is connected to the lower end of the hollow main shaft, the two ends of the gate are respectively connected to one of the hollow main shafts through a rotating arm, and the two ends of the gate are respectively located at In the two special-shaped guide grooves, T-shaped guide rails are arranged in the special-shaped guide grooves, and the T-shaped guide shoes on the hollow main shaft are slidably connected to the T-shaped guide rails. The special-shaped guide grooves are arranged vertically, and the part thereof above the ground elevation is provided with a widened portion. Side sealing strips are provided on the inner side walls of the widened portion. The two side sealing strips and the bottom sealing strip form a U-shaped sealing structure. The bottom sealing strip is arranged on the side of the subway entrance and exit floor structure. After the gate rises vertically along the special-shaped guide groove to above the ground elevation, it moves horizontally toward the widened portion, and the side of the gate is attached to the U-shaped sealing structure.

[0010] Furthermore, the synchronization shaft is divided into two sections, with a coupling arranged in the middle, and each section of the synchronization shaft is connected to a set of the self-locking screw elevator.

[0011] Furthermore, rollers are provided on the top, sides and bottom of the gate.

[0012] Furthermore, there are two gates, namely an outer gate and an inner gate. The hollow main shaft is located between the outer gate and the inner gate. A bearing B is provided at one end of the rotating arm, a bearing A is provided in the middle, and a sliding pin is provided at the other end. The bearing A is connected to the rotating shaft on the hollow main shaft. The bearing B on one of the rotating arms is connected to the hinged base on the outer gate through a pin shaft, and the sliding pin on the rotating arm is connected to the slide groove on the inner gate. The bearing B on the other rotating arm is connected to the hinged base on the inner gate through a pin shaft, and the sliding pin on the rotating arm is connected to the slide groove on the outer gate.

[0013] Furthermore, each of the hollow main shafts is connected to the outer gate and the inner gate via two groups of rotating arms, and each group of rotating arms includes two rotating arms.

[0014] Furthermore, the rotating shaft is connected to the T-shaped guide shoe.

[0015] Furthermore, a decorative panel is fixed on the outer gate, a decorative panel slide groove is provided on the decorative panel, and the inner gate lug on the top of the inner gate is slidably connected to the decorative panel slide groove.

[0016] Furthermore, the number of the gate is one, a bearing A is provided at one end of the rotating arm, and the bearing A is connected to the rotating shaft on the hollow main shaft, and a bearing B is provided at the other end of the rotating arm, and the bearing B is connected to the hinged base on the gate through a pin shaft.

[0017] Furthermore, the rotating shaft is connected to the T-shaped guide shoe.

[0018] Furthermore, a decorative plate is fixed on the top of the gate.

[0019] Compared with the prior art, the present invention has the following beneficial effects:

[0020] 1. The gate lifting and sealing of the present invention only has one power source and one set of driving mechanism, that is, it is driven by a drive motor. Through the single upward force source of the self-locking screw elevator, it can realize the lifting and sealing functions of the gate. The entire structure adopts mechanical structure, which is maintenance-free, simple and reliable, and reduces the occurrence of failures.

[0021] 2. This invention ensures that after the gate moves vertically and rises into position, the gate body rests on the top of the special-shaped guide groove to maintain a constant height. The vertical displacement driving force is then automatically converted into horizontal displacement driving force. The gate body moves horizontally and, once in position, squeezes the sealing strip from the front to achieve a seal, achieving both gate raising and sealing functions sequentially.

[0022] 3. The present invention realizes the synchronous rising of both sides of the gate. Through the synchronization shaft, the left and right sets of screw elevators maintain mechanical synchronization in real time, and reliable synchronization can be achieved without additional electrical control.

[0023] 4. This sealing method is stable and reliable. The upward force of the gate is converted into a horizontal outward extrusion force, achieving a positive squeeze seal between the gate outer surface and the sealing strip. The sealing strip is only subject to positive extrusion in one direction, and this extrusion force is sufficient to overcome the impact of flooding. This method has lower requirements for the material and process of the sealing strip. Compared with sliding friction sealing methods, the sealing extrusion force can be greater, resulting in a tight seal, without the concern of friction-induced wear or even extrusion of the sealing strip.

[0024] 5. This invention uses a self-locking screw jack as the lifting device, with the helix angle selected to be smaller than the friction angle to achieve self-locking. When the screw does not rotate after the gate is in place, the screw sleeve flange that matches the screw self-locks to the screw, maintaining the height of the gate. No additional gate locking device, such as a locking pin, is required, reducing the need for additional drive and locking devices, and improving reliability. The screw jack is also grease-lubricated, simplifying maintenance.

[0025] 6. This invention utilizes a split gate, with inner and outer gates that can be folded or unfolded. When not in use, they can be lowered and folded below the ground, saving installation space and minimizing damage to the exterior. When unfolded, the inner and outer gates distribute force evenly, and both the inside and outside are sealed, isolating the drive unit from external floodwaters.

[0026] 7. The control method of the present invention is simple, and only conventional control is performed on the motor, including three functions of forward rotation, reverse rotation and stop. There is no complicated control logic, and it is simple, safe, reliable and easy to maintain.

[0027] 8. Except for the drive motor, the present invention uses purely mechanical mechanisms, which require little maintenance and are highly safe and reliable. An emergency hand crank device is also provided. In the event of disasters such as floods, especially power outages and motor failures, manual operation can be used to synchronize the gate's rise and self-seal, ensuring the safety of people and property. BRIEF DESCRIPTION OF THE DRAWINGS

[0028] Figure 1 This is a schematic structural diagram of Example 1 of the present invention;

[0029] Figure 2 For the embodiment of the present invention Figure 1 AA cross-section of

[0030] Figure 3 For the embodiment of the present invention Figure 1 BB cross-section diagram;

[0031] Figure 4 This is a schematic diagram showing a gate in Example 1 of the present invention rising above the ground level;

[0032] Figure 5 Schematic diagram of the gate in the expanded state according to embodiment 1 of the present invention;

[0033] Figure 6 Schematic diagram of the gate rising process in Example 2 of the present invention;

[0034] Figure 7 Schematic diagram of the gate in the expanded state according to embodiment 2 of the present invention.

[0035] In the figure: 1-frame base, 2-drive motor, 3-reducer, 4-synchronizing shaft, 5-bearing seat, 6-coupling, 7-hand crank device, 8-screw, 9-screw sleeve flange, 10-hollow main shaft, 11-spindle flange, 12-swing arm, 13-bearing A, 14-rotating shaft, 15-bearing B, 16-pin shaft, 17-hinge base, 18-slide pin, 19-slide groove, 20-external gate, 21-inner gate, 22-roller, 23-special-shaped guide groove, 24-T-type guide rail, 25-T-type guide shoe, 26-side sealing strip, 27-bottom sealing strip, 28-decorative panel, 29-decorative panel slide groove, 30-inner gate lug, 31-subway entrance and exit floor structure. DETAILED DESCRIPTION

[0036] In order to enable those skilled in the art to better understand the technical solution of the present invention, the present invention is described in detail below with reference to the accompanying drawings and specific embodiments.

[0037] Example 1

[0038] The embodiment of the present invention provides a lifting and automatically opening sealing device for subway entrance and exit gates, such as Figure 1-Figure 5 As shown, it includes a drive motor 2, a self-locking screw elevator, a hollow main shaft 10, a rotating arm 12, a gate, a special-shaped guide groove 23, a side sealing strip 26, and a bottom sealing strip 27. The drive motor 2 is connected to the reducer 3, and the reducer 3 is connected to the synchronous shaft 4. The synchronous shaft 4 is also connected to the hand-cranked device 7 and two sets of self-locking screw elevators. To ensure the radial deviation of the synchronous shaft 4, the synchronous shaft 4 is divided into two sections, with a coupling 6 provided in the middle. Each section of the synchronous shaft 4 is connected to a set of the self-locking screw elevators. The drive motor 2, reducer 3, and self-locking screw elevator are fixed to the frame base 1, and the synchronous shaft 4 is fixed to the frame base 1 via a bearing seat 5.

[0039] The self-locking screw elevator primarily comprises a screw sleeve flange 9 and a screw 8, which are mechanically coupled. When the synchronous shaft 4 rotates, it drives the screw 8 to rotate. When the screw 8 rotates, the screw sleeve flange 9 rises or descends. When the screw 8 does not rotate, the screw sleeve flange 9 self-locks and does not descend. A spindle flange 11 is fixed to the screw sleeve flange 9 of the self-locking screw elevator. This spindle flange 11 is connected to the lower end of a hollow spindle 10, which is sleeved onto the screw 8.

[0040] There are two gates: an outer gate 20 and an inner gate 21. The hollow main shaft 10 is located between the outer and inner gates 20 and 21. Each end of the gate is connected to a hollow main shaft 10 via a pivot arm 12. Each hollow main shaft 10 is connected to the outer and inner gates 20 and 21 via two sets of pivot arms 12, each set comprising two pivot arms 12. Each pivot arm 12 is equipped with a bearing B15 at one end, a bearing A13 in the middle, and a sliding pin 18 at the other end. In each set of pivot arms 12, the bearing B15 on one pivot arm 12 is connected to the hinged base 17 on the outer gate 20 via a pin 16. The sliding pin 18 on this pivot arm 12 is connected to the slide slot 19 on the inner gate 21. The bearing B15 on the other pivot arm 12 is connected to the hinged base 17 on the inner gate 21 via a pin 16. The sliding pin 18 on this pivot arm 12 is connected to the slide slot 19 on the outer gate 20. The bearing A13 is connected to the rotating shaft 14 on the hollow main shaft 10. The design of two symmetrical pivot arms 12 allows the inner gate 21 and outer gate 20 to fold synchronously outward or inward parallel to the hollow main shaft 10.

[0041] The two ends of the gate are respectively located in two special-shaped guide grooves 23, and the two special-shaped guide grooves 23 are arranged symmetrically about the center of the subway entrance and exit. A T-shaped guide rail 24 is provided in the special-shaped guide groove 23, and the T-shaped guide rail 24 is slidably connected to a T-shaped guide shoe 25, and the T-shaped guide shoe 25 is connected to the rotating shaft 14. The special-shaped guide groove 23 is arranged vertically, and the portion thereof above the ground elevation is provided with a widened portion, that is, the width of the special-shaped guide groove 23 above the ground elevation is larger than the width below the ground elevation. The width of the portion of the special-shaped guide groove 23 below the ground elevation matches the width of the outer gate 20 and the inner gate 21 in the folded state, and the width of the portion of the special-shaped guide groove 23 above the ground elevation matches the width of the outer gate 20 and the inner gate 21 in the unfolded state. A side sealing strip 26 is provided on the inner sidewall of the widened portion, and a bottom sealing strip 27 is provided on the side of the subway entrance floor structure 31. The bottom sealing strip 27 and the two side sealing strips 26 form a U-shaped sealing structure. After the gate rises vertically within the special-shaped guide groove 23 to a level above the ground, it moves horizontally toward the widened portion. The side of the gate abuts against the U-shaped sealing structure, forming a seal to prevent water seepage.

[0042] A decorative plate 28 is fixed to the outer gate 20 and is provided with a decorative plate slide 29. An inner gate lug 30 on the top of the inner gate 21 is slidably connected to the decorative plate slide 29. This allows the decorative plate 28 to slide horizontally on the top of the inner gate 21 when the inner and outer gates 21 and 20 are folded synchronously.

[0043] Rollers 22 are provided on the top, sides and bottom of the gate to reduce the sliding friction between the gate and the special-shaped guide groove 23.

[0044] This embodiment is directly applicable to flood prevention door systems at rail transit station entrances and exits. When the drive motor 2 is activated, the reducer 3 rotates the synchronous shaft 4, which in turn drives two symmetrical sets of self-locking screw elevators to achieve synchronous rotation of the screws 8. This in turn drives the two screw sleeve flanges 9 to achieve vertical synchronous lifting, achieving synchronized vertical lifting of the two hollow spindles 10. Simultaneously, the T-shaped guide shoe 25 connected to the hollow spindle 10 slides on the T-shaped guide rail 24, providing horizontal guidance.

[0045] When the drive motor 2 rotates forward and the hollow main shaft 10 begins to rise, the gravity acting on the inner and outer gates 21 and 20 is decomposed into a horizontal force perpendicular to the special-shaped guide groove 23 and a force acting along the length of the rotating arm 12. The roller 22 reduces the friction between the inner and outer gates 21 and 20 and the special-shaped guide groove 23. At this point, the inner and outer gates 21 and 20 are in a folded state.

[0046] As the hollow main shaft 10 rises, the inner gate 21 and the outer gate 20 completely enter the part of the special-shaped guide groove 23 that is above the ground level. Under the action of gravity, the inner gate 21 and the outer gate 20 are synchronously expanded to both sides. As the hollow main shaft 10 continues to rise, the rollers 22 at the top of the inner gate 21 and the outer gate 20 press the top of the special-shaped guide groove 23. The reaction force and the gravity of the gate itself combine to expand the inner gate 21 and the outer gate 20 to both sides. The outer gate 20 presses on the side sealing strips 26 and the bottom sealing strips 27 to form a U-shaped seal, as shown in FIG. Figure 5 At the same time, the inner gate lug 30 and the decorative plate slide groove 29 enable the decorative plate 28 to maintain horizontal sliding when the inner gate 21 and the outer gate 20 are unfolded.

[0047] When the driving motor 2 reverses and drives the hollow main shaft 10 to descend, the rollers 22 at the bottom of the inner gate 21 and the outer gate 20 contact the bottom surface of the widened portion of the special-shaped guide groove 23, which applies an upward force to the inner gate 21 and the outer gate 20 respectively. With the downward pulling force of the hollow main shaft 10, the inner gate 21 and the outer gate 20 will fold inward synchronously. At the same time, the inner gate lug 30 and the decorative panel slide 29 enable the decorative panel 28 to maintain horizontal sliding when the inner gate 21 and the outer gate 20 are folded inward. Then the hollow main shaft 10 continues to descend to the lowest position, and the decorative panel 28 just enters the groove of the subway entrance and exit floor structure 31. The decorative panel 28 is flush with the entrance and exit ground, which well hides the entire anti-flood door to achieve an aesthetic effect.

[0048] The hand crank device 7 provided at the end of the synchronization shaft 4 can realize manual operation in the event of power failure or electrical failure, so as to realize the synchronous rising and self-sealing of the inner gate 21 and the outer gate 20.

[0049] Example 2

[0050] The embodiment of the present invention provides a lifting and automatically opening sealing device for subway entrance and exit gates, such as Figure 6 and Figure 7 As shown, the technical solution of Example 1 is simplified, the number of gates is one, and only the outer gate 20 is retained. Correspondingly, the structure of the rotating arm 12 and the decorative panel 28 is also simplified. Specifically, the number of the rotating arms 12 in each group is changed to one, and the length of the rotating arm 12 is shortened. A bearing A13 is provided at one end of the rotating arm 12, and the bearing A13 is connected to the rotating shaft 14 on the hollow main shaft 10. A bearing B15 is provided at the other end of the rotating arm 12, and the bearing B15 is connected to the hinged base 17 on the outer gate 20 through a pin shaft 16. The decorative panel 28 is fixed to the top of the outer gate 20, and the decorative panel slide groove 29 on the decorative panel 28 is cancelled. The working principle of this embodiment is the same as that of Example 1.

[0051] The present invention has been described in detail above through the embodiments, but the contents described are only exemplary embodiments of the present invention and cannot be considered to limit the scope of implementation of the present invention. The scope of protection of the present invention is defined by the claims. Any use of the technical solution described in the present invention, or any person skilled in the art who, inspired by the technical solution of the present invention, designs a similar technical solution within the essence and scope of protection of the present invention to achieve the above-mentioned technical effects, or any equivalent changes and improvements made to the scope of application, shall still fall within the scope of protection covered by the patent of the present invention.

Claims

1. A lifting and automatically opening and sealing device for subway entrance and exit gates, characterized by: It includes a driving motor, a self-locking screw elevator, a hollow main shaft, a rotating arm, a gate, a special-shaped guide groove, a side sealing strip and a bottom sealing strip. The driving motor is connected to the reducer, and the reducer is connected to the synchronous shaft. The synchronous shaft is simultaneously connected to the hand-cranked device and two sets of self-locking screw elevators. The screw sleeve flange of the self-locking screw elevator is fixed with a main shaft flange, and the main shaft flange is connected to the lower end of the hollow main shaft. The two ends of the gate are respectively connected to one of the hollow main shafts through a rotating arm. The two ends of the gate are respectively located in two special-shaped guide grooves, and the special-shaped guide grooves are provided with a main shaft flange. A T-shaped guide rail is provided, and the T-shaped guide shoe on the hollow main shaft is slidably connected to the T-shaped guide rail. The special-shaped guide groove is vertically arranged, and a widened portion is provided on the portion thereof above the ground elevation. A side sealing strip is provided on the inner side wall of the widened portion. The two side sealing strips and the bottom sealing strip form a U-shaped sealing structure. The bottom sealing strip is provided on the side of the subway entrance and exit floor structure. After the gate rises vertically along the special-shaped guide groove to above the ground elevation, it moves horizontally toward the widened portion, and the side of the gate is attached to the U-shaped sealing structure. There are two gates, namely an outer gate and an inner gate. The hollow main shaft is located between the outer gate and the inner gate. A bearing B is provided at one end of the rotating arm, a bearing A is provided in the middle, and a sliding pin is provided at the other end. The bearing A is connected to the rotating shaft on the hollow main shaft. The bearing B on one of the rotating arms is connected to the hinged base on the outer gate through a pin shaft, and the sliding pin on the rotating arm is connected to the slide groove on the inner gate. The bearing B on the other rotating arm is connected to the hinged base on the inner gate through a pin shaft, and the sliding pin on the rotating arm is connected to the slide groove on the outer gate.

2. The lifting and automatically opening sealing device for subway entrance and exit gates according to claim 1, characterized in that: The synchronous shaft is divided into two sections, with a coupling arranged in the middle, and each section of the synchronous shaft is connected to a set of the self-locking screw elevator.

3. The lifting and automatically opening sealing device for subway entrance and exit gates according to claim 1, characterized in that: The top, sides and bottom of the gate are all provided with rollers.

4. The lifting and automatically opening sealing device for subway entrance and exit gates according to claim 1, characterized in that: Each of the hollow main shafts is connected to the outer gate and the inner gate via two groups of rotating arms, and each group of rotating arms includes two rotating arms.

5. The lifting and automatically opening sealing device for subway entrance and exit gates according to claim 1, characterized in that: The rotating shaft is connected to the T-shaped guide shoe.

6. The lifting and automatically opening sealing device for subway entrance and exit gates according to claim 1, characterized in that: A decorative plate is fixed on the outer gate, a decorative plate slide groove is provided on the decorative plate, and the inner gate lug on the top of the inner gate is slidably connected to the decorative plate slide groove.

7. A lifting and automatically opening and sealing device for subway entrance and exit gates, characterized by: It includes a driving motor, a self-locking screw elevator, a hollow main shaft, a rotating arm, a gate, a special-shaped guide groove, a side sealing strip and a bottom sealing strip. The driving motor is connected to the reducer, and the reducer is connected to the synchronous shaft. The synchronous shaft is simultaneously connected to the hand-cranked device and two sets of self-locking screw elevators. The screw sleeve flange of the self-locking screw elevator is fixed with a main shaft flange, and the main shaft flange is connected to the lower end of the hollow main shaft. The two ends of the gate are respectively connected to one of the hollow main shafts through a rotating arm. The two ends of the gate are respectively located in two special-shaped guide grooves, and the special-shaped guide grooves are provided with a main shaft flange. A T-shaped guide rail is provided, and the T-shaped guide shoe on the hollow main shaft is slidably connected to the T-shaped guide rail. The special-shaped guide groove is vertically arranged, and a widened portion is provided on the portion thereof above the ground elevation. A side sealing strip is provided on the inner side wall of the widened portion. The two side sealing strips and the bottom sealing strip form a U-shaped sealing structure. The bottom sealing strip is provided on the side of the subway entrance and exit floor structure. After the gate rises vertically along the special-shaped guide groove to above the ground elevation, it moves horizontally toward the widened portion, and the side of the gate is attached to the U-shaped sealing structure. There is one gate, and a bearing A is provided at one end of the rotating arm, and the bearing A is connected to the rotating shaft on the hollow main shaft. A bearing B is provided at the other end of the rotating arm, and the bearing B is connected to the hinged base on the gate through a pin shaft.

8. The lifting and automatically opening and sealing device for subway entrance and exit gates according to claim 7, characterized in that: The synchronous shaft is divided into two sections, with a coupling arranged in the middle, and each section of the synchronous shaft is connected to a set of the self-locking screw elevator.

9. The lifting and automatically opening sealing device for subway entrance and exit gates according to claim 7, characterized in that: The top, sides and bottom of the gate are all provided with rollers.

10. The lifting and automatically opening sealing device for subway entrance and exit gates according to claim 7, characterized in that: The rotating shaft is connected to the T-shaped guide shoe.

11. The lifting and automatically opening sealing device for subway entrance and exit gates according to claim 7, characterized in that: A decorative plate is fixed on the top of the gate.

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