An interval flood-proof protection air-tight door for sealing a metro lead-out line and a control method

Abstract

The application discloses an interval flood protection sealed door for sealing a metro lead-out line and a control method, and the sealed door comprises a door frame, a door leaf, an executing mechanism, a lower sealing beam, an upper sealing plate and a hinge, the door leaf is connected with the door frame through the hinge, the upper sealing plate and the lower sealing beam are arranged on the door leaf, the executing mechanism comprises a main executing mechanism and an auxiliary executing mechanism, the main executing mechanism is connected with the door leaf, the hinge, the upper sealing plate and the lower sealing beam, and the auxiliary executing mechanism is connected with the upper sealing plate, the automatic opening and closing of the contact net sealing plate is controlled through a power system, and the opening and closing is synchronously performed with the door leaf, the quick closing and sealing of the protection sealed door are realized, and the protection efficiency of the protection sealed door is improved.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of sealing doors, in particular to an interval flood protection sealing door for sealing metro outgoing lines and a control method. BACKGROUND

[0002] The interval tunnel of the urban metro bears the function of civil air defense, needs to meet the protection requirements in wartime, and is provided with a protection sealing door to achieve the protection requirements. However, due to the small space of the interval tunnel, the development is very rapid in an emergency, so when protection is carried out through the protection sealing door, quick response and action are needed to achieve effective protection and improve the protection effect. The current protection sealing door mostly adopts a flashlight dual-purpose control mechanism to achieve quick opening and closing, but due to the limitation of the door leaf of the metro catenary, a space for the catenary is reserved on the door leaf, and after the door leaf is closed, the catenary area is closed through a sealing plate and other structures, which cannot achieve quick sealing, thereby leading to poor protection effect and long reaction time, and the integrated degree of the execution mechanism is low, which leads to the need for multiple mechanism linkage and high failure rate. The present application provides an interval flood protection sealing door for sealing metro outgoing lines and a control method to solve the above problems. SUMMARY

[0003] The present application provides an interval flood protection sealing door for sealing metro outgoing lines and a control method, which realizes quick opening and closing of the protection sealing door and closing of the catenary area, and improves the protection effect.

[0004] The technical solution adopted by the present application to solve the above technical problems is as follows:

[0005] An interval flood protection sealing door for sealing metro outgoing lines, comprising a door frame, a door leaf, an execution mechanism, a lower sealing beam, an upper sealing plate and a hinge, the door leaf is connected with the door frame through the hinge, the upper sealing plate and the lower sealing beam are arranged on the door leaf, the execution mechanism comprises a main execution mechanism and a secondary execution mechanism, the main execution mechanism is connected with the door leaf, the hinge, the upper sealing plate and the lower sealing beam, and the secondary execution mechanism is connected with the upper sealing plate.

[0006] The upper sealing plate comprises a door frame sealing plate and a catenary sealing plate, the door frame sealing plate is movably connected on the door leaf and connected with the main execution mechanism, and the catenary sealing plate is movably connected on the door frame sealing plate and connected with the secondary execution mechanism.

[0007] Further, the secondary execution mechanism comprises a power structure, a bidirectional output rod and a moving seat, the catenary sealing plates are arranged in pairs on the door frame sealing plate, the moving seat is arranged on the two catenary sealing plates, the bidirectional output rod is connected on the power structure, and the moving seat is connected on the bidirectional output rod.

[0008] Further, the main execution mechanism comprises a power structure, a connecting structure, a lifting structure, a locking structure and an opening and closing structure, the power structure is arranged on the door leaf, the lifting structure, the locking structure and the opening and closing structure are all connected to the power structure through the connecting structure, and the lifting structure, the locking structure and the opening and closing structure are arranged in layers.

[0009] Further, the lifting structure is arranged on the door leaf and connected to the upper sealing plate and the lower sealing beam, the lifting structure comprises a power rod and a lifting sleeve, the power rod is connected to the power structure through the connecting structure, and the lifting sleeve is movably connected to the power rod and connected to the upper sealing plate and the lower sealing beam.

[0010] Further, the locking structure comprises a lock and a scissor-type telescopic top, the lock is connected to the scissor-type telescopic top, and the scissor-type telescopic top is connected to the power structure through the connecting structure.

[0011] Further, the opening and closing structure comprises a power output end, a transmission chain and a power receiving end, the power output end is connected to the power structure through the connecting structure, the power receiving end is arranged on the hinge, and the power output end and the power receiving end are arranged at two ends of the transmission chain respectively.

[0012] Further, the lower sealing beam comprises a track beam and a sealing rubber strip, the track beam is connected to the lifting sleeve, and the sealing rubber strip is arranged on the outer periphery of the track beam.

[0013] Further, the middle part of the door frame sealing plate is provided with a clearance hole, and the pair of contact net sealing plates are arranged on the door frame sealing plate through the moving wheels and move to close the clearance hole; the outer periphery of the door frame sealing plate and the contact net sealing plate is provided with a sealing rubber strip, and the sealing rubber strips are arranged continuously.

[0014] The screw nut structure is arranged between the bidirectional output rod and the moving seat, and opposite threads are arranged on the two sides of the bidirectional output rod.

[0015] Further, the hinge is provided with an angle sensor, and the upper sealing plate, the lower sealing beam and the locking structure are provided with sensing switches.

[0016] A control method of an interval flood protection sealed door of a sealed subway lead-out line, comprising the following steps:

[0017] S1, state self-checking: after receiving the opening and closing instruction, the power structure of the main execution mechanism and the power structure of the auxiliary execution mechanism are started, the angle sensor detects the opening and closing state of the door leaf, the sensing switches detect the opening and closing state of the lower sealing beam, the door frame sealing plate and the contact net sealing plate and the locking state of the lock respectively;

[0018] S2, closing preparation: power structure action, drive the mechanism that is not reset to reset, after reset, power structure standby; When self-checking detects that all mechanisms are in the reset state, directly open and close the door leaf;

[0019] S3, door leaf opening and closing: the power structure of the main execution mechanism outputs power to the opening and closing structure, and drives the door leaf to move to the open and closed state;

[0020] S4, locking: when the door leaf is closing, the angle sensor detects that the door leaf is in place, and the power structure of the main execution mechanism first outputs power to the locking structure to lock, and then the power structure of the main execution mechanism outputs power to the lifting structure to extend the lower sealing beam and the upper sealing plate to the position, seal the door frame, and finally the power structure of the auxiliary execution mechanism outputs power to the bidirectional output rod to fold the contact net sealing plate, and complete the door leaf;

[0021] When the door leaf is opening, the angle sensor detects that the door leaf is in place, and the power structure of the main execution mechanism first outputs power to the locking structure to lock, and the lower sealing beam, the door frame sealing plate and the contact net sealing plate are in the reset state.

[0022] The present application has the following advantages:

[0023] The power system controls the automatic opening and closing of the contact net sealing plate, and synchronizes with the door leaf opening, realizes the rapid closing and sealing of the protective sealed door, and improves the protection efficiency of the protective sealed door;

[0024] The contact net sealing plate is opened and closed in opposite directions, which improves the sealing effect of the contact net and reduces the interference caused by the contact net, without affecting the opening and closing efficiency and sealing efficiency of the protective sealed door. BRIEF DESCRIPTION OF DRAWINGS

[0025] Figure 1 It is a front view of the overall structure of the present application;

[0026] Figure 2 It is a rear view of the overall structure of the present application;

[0027] Figure 3 It is a schematic diagram of the overall structure of the main execution mechanism of the present application;

[0028] Figure 4 It is a front view of the main execution mechanism of the present application;

[0029] Figure 5 It is a top view of the main execution mechanism of the present application;

[0030] Figure 6 It is a schematic diagram of the opening and closing structure of the present application;

[0031] Figure 7A schematic diagram of the transmission chain connection structure of the application;

[0032] Figure 8 A schematic diagram of the setting state of the contact net sealing plate of the application;

[0033] Figure 9 A schematic diagram of the upper sealing plate structure of the application.

[0034] The figure mark: 1-door frame, 2-door leaf, 3-lower sealing beam, 4-upper sealing plate, 41-door frame sealing plate, 42-contact net sealing plate, 5-hinge, 6-main execution mechanism, 61-lifting structure, 611-power rod, 612-lifting sleeve, 62-locking structure, 621-locking, 622-scissor retractable roof, 63-opening and closing structure, 631-power output end, 632-transmission chain, 633-power receiving end, 7-secondary execution mechanism, 71-bidirectional output rod, 72-moving seat. DETAILED DESCRIPTION

[0035] The technical solutions in the embodiments of the application will be clearly and completely described below with reference to the accompanying drawings of the description. Obviously, the described embodiments are only a part of the embodiments of the application, rather than all the embodiments of the application. Based on the embodiments in the application, all other embodiments obtained by those skilled in the art without creative labor fall within the protection scope of the application.

[0036] In the description of the patent, it should be understood that the terms "center", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer" and the like indicate the orientation or positional relationship shown in the drawings, and are only for the convenience of describing the patent and simplifying the description, and do not indicate or imply that the device or element referred to must have a particular orientation, be constructed and operated in a particular orientation, and therefore cannot be understood as a limitation of the patent.

[0037] As Figure 1 , 2 shown, an interval flood protection airtight door for sealing a subway lead-out line includes a door frame 1, a door leaf 2, an execution mechanism, a lower sealing beam 3, an upper sealing plate 4 and a hinge 5, the door leaf 2 is connected with the door frame 1 through the hinge, the upper sealing plate 4 and the lower sealing beam 3 are arranged on the door leaf 2, the execution mechanism includes a main execution mechanism 6 and a secondary execution mechanism 7, the main execution mechanism 6 is connected with the door leaf 2, the hinge 5, the upper sealing plate 4 and the lower sealing beam 3, and the secondary execution mechanism 7 is connected with the upper sealing plate 4.

[0038] This invention sets up main and auxiliary actuators to control the opening and closing of the door and the contact wire sealing structure respectively, so as to realize the orderly closing of the contact wire sealing device, improve the automation level of the device, thereby improving the efficiency of the protective airtight door in sealing protection, and improving the sealing effect on the contact wire. Since the subway tunnel is underground, it is very easy for the tunnel to be flooded by heavy rainfall. The section protective airtight partition door located in the subway lead-out section is generally manually operated and cannot be closed after the tunnel is flooded. This invention achieves flood prevention by controlling the automatic closing of the door and the contact wire sealing plate, and meets the requirement of rapid opening and closing in an emergency.

[0039] like Figure 8 , 9 As shown, the upper sealing plate 4 includes a door frame sealing plate 41 and a contact wire sealing plate 42. The door frame sealing plate 41 is movably connected to the door leaf 2 and connected to the main actuator 6. The contact wire sealing plate 42 is movably connected to the door frame sealing plate 41 and connected to the auxiliary actuator 7.

[0040] like Figure 8 , 9 As shown, preferably, the door frame sealing plate 41 is provided with inner and outer double layers, and the contact wire sealing plate 42 is located between the double-layer door frame sealing plates 41. The two contact wire sealing plates 42 are movably connected between the inner and outer double-layer door frame sealing plates 41. The opening and closing of the clearance hole on the door frame sealing plate 41 is realized by the drive of the auxiliary actuator 7.

[0041] like Figure 8 As shown, the auxiliary actuator 7 further includes a power structure, a bidirectional output rod 71, and a movable seat 72. The contact wire sealing plates 42 are arranged in pairs on the door frame sealing plate 41. The movable seat 72 is arranged on the two contact wire sealing plates 42. The bidirectional output rod 71 is connected to the power structure, and the movable seat 72 is connected to the bidirectional output rod 71. The movement of the movable seat 72 on the bidirectional output rod 71 is realized by a screw and nut structure.

[0042] Preferably, the commutator of the auxiliary actuator 7 is provided with a handle connection end, which is connected to a long-handled hand crank to realize manual opening and closing of the contact wire sealing plate 42.

[0043] Preferably, two moving seats 72 are arranged on the two overhead line sealing plates 42 respectively, and when the moving seats 72 are driven to move by the bidirectional output rod 71, the two overhead line sealing plates 42 are driven to open and close in opposite directions. The opening and closing of the overhead line sealing plate 42 in opposite directions facilitates the sealing of the overhead line and does not interfere with the opening and closing of the protective closed door, and the sealing effect is better and easier to realize automatic control. The overhead line is located at the top of the tunnel, and interference will occur when the protective closed door is closed, so the overhead line position generally adopts the upper reserved opening mode to realize the accommodation of the overhead line, and the sealing plate is generally used for overhead line sealing, but manual operation is required, which is relatively slow in dealing with emergency situations. Therefore, the automatic control of the opposite opening and closing of the overhead line sealing plate 42 solves the above problems.

[0044] As shown in Figure 3 , 4 , 5, further, the main execution mechanism 6 comprises a power structure, a connecting structure, a lifting structure 61, a locking structure 62 and an opening and closing structure 63, the power structure is arranged on the door leaf 2, the lifting structure 61, the locking structure 62 and the opening and closing structure 63 are all connected to the power structure through the connecting structure, and the lifting structure 61, the locking structure 62 and the opening and closing structure 63 are arranged in layers.

[0045] The power structure drives the lifting structure 61, the locking structure 62 and the opening and closing structure 63 to act in sequence according to the instruction of the control system, so as to realize the opening, closing and sealing operation of the protective closed door, and improve the protection effect and efficiency of the protective closed door.

[0046] Preferably, the connecting structure comprises a clutch, a reverser and a shaft coupling, which is used to connect the power structure and the action members of the lifting structure 61, the locking structure 62 and the opening and closing structure 63.

[0047] Preferably, the power mechanism is an electric motor.

[0048] Preferably, the clutch is an electromagnetic clutch, and three clutches are arranged respectively and connected with the lifting structure 61, the locking structure 62 and the opening and closing structure 63 to realize the distribution control of power.

[0049] As shown in Figure 4 , further, the lifting structure 61 is arranged on the door leaf 2 and connected with the upper sealing plate 4 and the lower sealing beam 3, and is used to control the lifting of the upper sealing plate 4 and the lower sealing beam 3, the lifting structure 61 comprises a power rod 611 and a lifting sleeve 612, the power rod 611 is connected to the power structure through the connecting structure, and the lifting sleeve 612 is movably connected to the power rod 611 and connected with the upper sealing plate 4 and the lower sealing beam 3.

[0050] Preferably, the power rod 611 and the lifting sleeve 612 are in a screw nut structure.

[0051] As shown in Figure 4 Further, the locking structure 62 is used to control the opening and closing of the lock 621, including the lock 621 and the scissor-type retractable roof 622, the lock 621 is connected with the scissor-type retractable roof 622, and the scissor-type retractable roof 622 is connected with the power structure through the connecting structure.

[0052] Preferably, one of the commutators of the lifting structure 61 is provided with a manual operation wheel, and one of the commutators of the locking structure 62 is provided with a manual operation wheel, so as to realize the manual and electric dual control.

[0053] As shown in Figure 4 , 6 , 7, further, the opening and closing structure 63 is used to control the opening and closing of the door leaf, including the power output end 631, the transmission chain 632 and the power receiving end 633, the power output end 631 is connected with the power structure through the connecting structure, the power receiving end 633 is arranged on the hinge 5, and the power output end 631 and the power receiving end 633 are respectively arranged at two ends of the transmission chain 632.

[0054] Preferably, the other end of the power output end 631 is provided with a commutator, and the commutator is provided with a manual operation wheel.

[0055] Preferably, the power output end 631 is a speed reducer, the transmission chain 632 is a transmission chain, and the power receiving end 633 is a gear set, the output end of the speed reducer is connected with the sprocket of the driving end of the transmission chain, one of the gear sets is located at the end of the hinge shaft, and the other is connected with the sprocket of the driven end of the transmission chain.

[0056] Further, the lower sealing beam 3 is used to seal the lower door frame, including the track beam and the sealing rubber strip, the track beam is connected with the lifting sleeve 612, and the sealing rubber strip is arranged on the outer periphery of the track beam.

[0057] Further, the door frame sealing plate 41 is provided with a gap hole in the middle, and the contact network sealing plate 42 arranged in pairs is arranged on the door frame sealing plate 41 through the moving wheel and moves to close the gap hole; the outer periphery of the door frame sealing plate 41 and the contact network sealing plate 42 is provided with a sealing rubber strip, and the sealing rubber strips on the door frame sealing plate 41 and the contact network sealing plate 42 are continuously and uninterruptedly arranged after the contact network sealing plate 42 is closed in place, so as to realize the sealing of the upper door frame.

[0058] Preferably, the door frame sealing plate 41 and the contact network sealing plate 42 are provided with a sealing rubber strip, and the gap between the door frame sealing plate 41 and the contact network sealing plate 42 is sealed after the contact network sealing plate 42 is closed in place.

[0059] Preferably, the door leaf 2 is provided with a sliding groove, and the door frame sealing plate 41 is provided with a sliding block located in the sliding groove, so that the sliding block and the sliding groove cooperate to limit the door frame sealing plate 41.

[0060] The bidirectional output rod 71 and the moving seat 72 are in a screw nut structure, the bidirectional output rod 71 is provided with threads in opposite directions on both sides, and the moving seat 72 is moved in opposite directions through the threads in opposite directions.

[0061] Further, the hinge 5 is provided with an angle sensor for detecting the opening and closing angle and real-time position of the door leaf, and the upper sealing plate 4, the lower sealing beam 3 and the locking structure 62 are provided with inductive switches for detecting the current opening and closing state of the structure.

[0062] A control method of a section flood protection sealed door for sealing a metro lead-out line, comprising the following steps:

[0063] S1, state self-checking: after receiving the opening and closing instruction, the power structure of the main execution mechanism 6 and the power structure of the auxiliary execution mechanism 7 are started, the angle sensor detects the opening and closing state of the door leaf 2, and the inductive switches detect the opening and closing state of the lower sealing beam 3, the door frame sealing plate 41 and the contact net sealing plate 42 and the locking state of the lock;

[0064] S2, closing preparation: the power structure is actuated to drive the un-reset mechanism to reset, and after resetting, the power structure is on standby; when the self-checking detects that all mechanisms are in the reset state, the door leaf is directly opened and closed;

[0065] S3, door leaf opening and closing: the power structure of the main execution mechanism 6 outputs power to the opening and closing structure 63, and drives the door leaf 2 to move to the opening and closing position;

[0066] S4, locking locking: when the door leaf is closed, the angle sensor detects that the door leaf 2 is in place, the power structure of the main execution mechanism 6 first outputs power to the locking structure 62 to lock, then the power structure of the main execution mechanism 6 outputs power to the lifting structure 61 to extend the lower sealing beam 3 and the upper sealing plate 4 to the position, seal the door frame, and finally the power structure of the auxiliary execution mechanism 7 outputs power to the bidirectional output rod 71 to fold the contact net sealing plate 42, and the door leaf is completed.

[0067] When the door leaf is opened, the angle sensor detects that the door leaf 2 is in place, the power structure of the main execution mechanism 6 first outputs power to the locking structure 62 to lock, and the lower sealing beam 3, the door frame sealing plate 41 and the contact net sealing plate 42 are all in the reset state.

[0068] It is apparent for a person skilled in the art that the present application is not limited to the details of the above-described exemplary embodiments, but that it can be implemented in other concrete forms without departing from the spirit or essential characteristics of the application. Therefore, the embodiments should be considered in all respects as illustrative and not restrictive, the scope of the application being defined by the appended claims rather than the above description, and all changes coming within the meaning and range of equivalency of the claims are therefore intended to be embraced therein, no reference signs in the claims being regarded as limiting the claim in which they are used.

Claims

1. A sealed flood protection airtight door for a subway lead-out line section, characterized in that, The device includes a door frame (1), a door leaf (2), an actuator, a lower sealing beam (3), an upper sealing plate (4), and a hinge (5). The door leaf (2) is connected to the door frame (1) via the hinge. The upper sealing plate (4) and the lower sealing beam (3) are located on the door leaf (2). The actuator includes a main actuator (6) and a secondary actuator (7). The main actuator (6) is connected to the door leaf (2), the hinge (5), the upper sealing plate (4), and the lower sealing beam (3). The secondary actuator (7) is connected to the upper sealing plate (4). The upper sealing plate (4) includes a door frame sealing plate (41) and a contact wire sealing plate (42). The door frame sealing plate (41) is movably connected to the door leaf (2) and connected to the main actuator (6). The contact wire sealing plate (42) is movably connected to the door frame sealing plate (41) and connected to the auxiliary actuator (7). The auxiliary actuator (7) includes a power structure, a bidirectional output rod (71) and a movable seat (72). The contact wire sealing plates (42) are arranged in pairs on the door frame sealing plate (41). The movable seat (72) is arranged on the two contact wire sealing plates (42). The bidirectional output rod (71) is connected to the power structure. The movable seat (72) is connected to the bidirectional output rod (71). The main actuator (6) includes a power structure, a connection structure, a lifting structure (61), a locking structure (62), and an opening and closing structure (63). The power structure is located on the door leaf (2). The lifting structure (61), the locking structure (62), and the opening and closing structure (63) are all connected to the power structure through the connection structure. The lifting structure (61), the locking structure (62), and the opening and closing structure (63) are arranged in layers.

2. The sealed flood protection airtight door for a subway lead-out line according to claim 1, characterized in that: The lifting structure (61) is installed on the door leaf (2) and connected to the upper sealing plate (4) and the lower sealing beam (3). The lifting structure (61) includes a power rod (611) and a lifting sleeve (612). The power rod (611) is connected to the power structure through a connecting structure. The lifting sleeve (612) is movably connected to the power rod (611) and connected to the upper sealing plate (4) and the lower sealing beam (3).

3. A sealed flood protection airtight door for a subway lead-out line according to claim 1, characterized in that: The locking structure (62) includes a lock (621) and a scissor top (622). The lock (621) is connected to the scissor top (622), and the scissor top (622) is connected to the power structure through a connecting structure.

4. A sealed flood protection airtight door for a subway lead-out line according to claim 1, characterized in that: The opening and closing structure (63) includes a power output end (631), a transmission chain (632) and a power receiving end (633). The power output end (631) is connected to the power structure through a connecting structure. The power receiving end (633) is located on the hinge (5). The power output end (631) and the power receiving end (633) are respectively located at both ends of the transmission chain (632).

5. A sealed flood protection airtight door for a subway lead-out line according to claim 2, characterized in that: The lower sealing beam (3) includes a track beam and a sealing strip. The track beam is connected to the lifting sleeve (612), and the sealing strip is located on the outer periphery of the track beam.

6. A sealed flood protection airtight door for a subway lead-out line according to claim 1, characterized in that: The door frame sealing plate (41) has a clearance hole in the middle. The pair of contact wire sealing plates (42) are mounted on the door frame sealing plate (41) by moving wheels and move in opposite directions to close the clearance hole. The outer periphery of the door frame sealing plate (41) and the contact wire sealing plate (42) are provided with sealing strips, and the sealing strips are continuously arranged. The bidirectional output rod (71) and the movable seat (72) are connected by a lead screw and nut structure, and the two sides of the bidirectional output rod (71) are respectively provided with threads in opposite directions.

7. A sealed flood protection airtight door for a subway lead-out line according to claim 1, characterized in that: An angle sensor is provided on the hinge (5), and induction switches are provided on the upper sealing plate (4), the lower sealing beam (3), and the locking structure (62).

8. A control method for a flood-proof and airtight door for a section of a sealed subway lead-out line according to any one of claims 1-7, characterized in that, Includes the following steps: S1, self-check: after receiving the opening and closing command, the power structure of the main actuator (6) and the power structure of the auxiliary actuator (7) are started. The angle sensor detects the opening and closing status of the door leaf (2), and the induction switch detects the opening and closing status and the locking status of the lower sealing beam (3), the door frame sealing plate (41), the contact wire sealing plate (42), respectively. S2, Closing Preparation: The power structure actuates, driving the unreset mechanisms to reset, and the power structure goes into standby mode after reset; when the self-test detects that all mechanisms are in the reset state, the door opens and closes directly; S3, door opening and closing: The power structure of the main actuator (6) outputs power to the opening and closing structure (63), driving the door (2) to move to the opening and closing position; S4, Locking: When the door is closing, after the angle sensor detects that the door (2) is in place, the power structure of the main actuator (6) first outputs power to the locking structure (62) to lock it. Then, the power structure of the main actuator (6) outputs power to the lifting structure (61) to extend the lower sealing beam (3) and the upper sealing plate (4) into place to seal the door frame. Finally, the power structure of the auxiliary actuator (7) outputs power to the bidirectional output rod (71) to close the contact wire sealing plate (42) and complete the door. When the door is opened, after the angle sensor detects that the door (2) is in place, the power structure of the main actuator (6) first outputs power to the locking structure (62) to lock it. The lower sealing beam (3), the door frame sealing plate (41) and the contact wire sealing plate (42) are all in the reset state.

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