Folding flap door

Abstract

The utility model discloses a folding type flap gate which comprises a base, a flap gate body and a flap gate body. The two sides of the base are each provided with one driving box; the lower end of the first door plate is arranged in the base and is rotatably arranged; the lower end of the second door plate is rotatably connected with the upper end of the first door plate; the upper end of the second door plate is rotatably provided with the lifting shaft; and each driving box is internally provided with one driving mechanism, and the driving mechanisms drive the lifting shafts to ascend or descend. The water retaining effect can be guaranteed, the door plate can be controlled to be unfolded or folded through electric control, meanwhile, the door plate is directly stored in the underground base after being folded, no space is occupied, and the door plate does not need to be additionally and manually disassembled for storage.

Description

Technical Field

[0001] This utility model relates to the technical field of flood control devices, and in particular to a folding flap door. Background Technology

[0002] Many existing entrances, shop doors, and homes have water-blocking devices installed. These devices are usually bulky and inconvenient to move. The water-blocking panels are large and difficult to store, especially in small spaces. They are also cumbersome to use, with most products stored away from the installation location, requiring repeated transport, resulting in low efficiency and an inability to handle unexpected emergencies. Furthermore, the aesthetics of these devices are generally poor.

[0003] CN107120051A discloses a hand-inserted water-blocking door, which requires manual insertion of the door panel to implement waterproofing. When waterproofing is not required, the door panel needs to be removed and stored separately, which is inconvenient to move. Utility Model Content

[0004] In view of this, the purpose of this utility model is to provide a folding flap door.

[0005] To achieve the above objectives, the technical solution adopted by this utility model is as follows:

[0006] A folding flap door, comprising:

[0007] A base, wherein the base is disposed within the foundation pit;

[0008] A drive box is provided on each side of the base;

[0009] The first door panel, the lower end of which is disposed within the base and is rotatably arranged;

[0010] The second door panel, the lower end of which is rotatably connected to the upper end of the first door panel;

[0011] The lifting shaft is rotatably provided at the upper end of the second door panel;

[0012] The drive mechanism is provided inside each drive box, and the drive mechanism drives the lifting shaft to rise or fall.

[0013] Each of the aforementioned drive mechanisms includes:

[0014] Lifting reducer;

[0015] The first lifting drive shaft steering gear is connected to the first lifting drive shaft steering gear via a first drive shaft;

[0016] The second hoisting drive shaft steering gear is connected to the first hoisting drive shaft steering gear via a second drive shaft.

[0017] A drive sprocket, which is connected to the lifting reducer in a driving manner;

[0018] A door panel lifting chain, wherein the door panel lifting chain is wrapped around the drive sprocket, and the lifting shaft is fixedly connected to the door panel lifting chain;

[0019] The driven sprocket rotates synchronously with the driving sprocket via the lifting chain of the door panel;

[0020] It also includes: a lifting motor, which is connected to the lifting reducer of one of the two drive mechanisms;

[0021] It also includes: a manual drive shaft, which is connected to the steering gear of the first lifting drive shaft;

[0022] It also includes: a transverse drive shaft, the two ends of which are respectively connected to the second lifting drive shaft steering gear of the two drive mechanisms;

[0023] The hoisting motor controls the rotation of the drive sprocket through a hoisting reducer;

[0024] When the hoisting motor is released, the manual drive shaft controls the rotation of the drive sprocket through the first hoisting drive shaft steering gear, the first drive shaft, and the hoisting reducer.

[0025] In the aforementioned folding flap door, each of the aforementioned drive mechanisms includes:

[0026] A pulley support rail base plate, wherein a pulley support rail is provided on the pulley support rail base plate;

[0027] The lifting shaft has a pulley at each end, and the pulleys are located within the pulley support rail.

[0028] The upper end of the pulley support track has a bent portion, which is arranged towards the door panel sealing surface.

[0029] The aforementioned folding door further includes a door panel side pressing mechanism, wherein each drive box is provided with a door panel side pressing mechanism.

[0030] Each of the door panel side pressing mechanisms includes:

[0031] Side-press motor;

[0032] A side-clamping reducer, wherein the side-clamping motor is connected to the side-clamping reducer in a transmission manner;

[0033] A side-clamping drive shaft is connected to the side-clamping reducer.

[0034] A side-clamping drive gear is fixed on the side-clamping transmission shaft;

[0035] A side-clamping lever, comprising: a side-clamping driven gear portion meshing with the side-clamping driving gear, and a lever portion connected to the side-clamping driven gear portion.

[0036] The aforementioned folding door, wherein the lever portion includes:

[0037] The first part is rod-shaped, and one end of the first part is fixedly connected to the side-pressing driven gear part;

[0038] The second part is arc-shaped, with one end of the second part fixedly connected to the other end of the first part, and the other end of the second part operably abutting against the first door panel and / or the second door panel;

[0039] The tangent at one end of the second part is perpendicular to the axial direction of the first part.

[0040] In the aforementioned folding flap door, the drive box has a side clamping hole, and the second part extends operably from the side clamping hole.

[0041] In the aforementioned folding flap door, the side-pressing motor is located at the upper part of the drive box, and the side-pressing reducer is located in the middle of the drive box;

[0042] The side-clamping motor and the side-clamping reducer are connected by a side-clamping chain and sprocket transmission mechanism.

[0043] In the aforementioned folding flap door, the lifting shaft is operably positioned in the lowermost first position and the uppermost second position.

[0044] It also includes a lower limit position of the door panel that matches the first position of the lifting shaft, and an upper limit position of the door panel that matches the second position of the lifting shaft.

[0045] The aforementioned folding door is characterized in that,

[0046] One of the two door panel side clamping mechanisms has a first side clamping limit for controlling the side clamping lever to be clamped into place;

[0047] The other of the two door panel side clamping mechanisms has a second side clamping limit for controlling the side clamping lever to retract into place.

[0048] In the aforementioned folding flap door, the inner walls of both drive boxes extend toward the center of the two drive boxes to form the door panel sealing surface.

[0049] In the aforementioned folding door, both the first door panel and the second door panel are provided with vertical sealing strips facing the sealing surface of the door panel; the upper end of the first door panel and the lower end of the second door panel are also provided with inter-door panel sealing strips.

[0050] Because this utility model employs the aforementioned technology, it has the following positive effects compared to existing technologies:

[0051] (1) This utility model can ensure the water blocking effect while controlling the door panel to unfold or fold through electronic control. After the door panel is folded, it can be directly stored in the base on the ground, without taking up space or requiring manual disassembly of the door panel for storage. Attached Figure Description

[0052] Figure 1 This is a schematic diagram of the folding flap door of this utility model from the front view.

[0053] Figure 2 This is a top view of the folding flap door of this utility model.

[0054] Figure 3 This is a side view schematic diagram of the door panel structure of the folding flip door of this utility model.

[0055] Figure 4 This is a cross-sectional schematic diagram of the drive mechanism of the folding flap door of this utility model from the side view.

[0056] Figure 5 This is a cross-sectional schematic diagram of the drive mechanism of the folding flap door of this utility model from the main viewing direction.

[0057] Figure 6 This utility model relates to a folding flip-up door. Figure 5 A magnified view of the right side.

[0058] Figure 7 This is a top view schematic diagram of the side pressing mechanism of the folding flap door of this utility model.

[0059] Figure 8 This utility model relates to a folding flip-up door. Figure 7 A magnified view of the right side.

[0060] Figure 9This is a cross-sectional schematic diagram of the drive mechanism of the folding flap door of this utility model from the main viewing direction.

[0061] Figure 10 This utility model relates to a folding flip-up door. Figure 9 A magnified view of the right side.

[0062] Figure 11 , 12 This is a three-dimensional schematic diagram of the unfolded state of the folding door panel of this utility model.

[0063] Figure 13 , 14 This is a three-dimensional schematic diagram of the folded state of the folding flap door of this utility model.

[0064] Figure 15 This is a side view of the folded state of the folding flap door of this utility model.

[0065] Figure 16 This is a side view of the folding door panel of this utility model.

[0066] Figure 17 This utility model relates to the door panel of a folding flip-up door. Figure 16 A magnified view of the upper part.

[0067] Figure 18 This is a schematic diagram of the retracted state of the side pressing mechanism of the folding flap door of this utility model from a top view.

[0068] In the attached diagram: 101, base; 102, drive box; 103, side clamping hole; 104, door panel sealing surface; 11, first door panel; 12, second door panel; 13, lifting shaft; 21, lifting reducer; 22, first lifting drive shaft steering gear; 221, first drive shaft; 23, second lifting drive shaft steering gear; 231, second drive shaft; 24, drive sprocket; 25, door panel lifting chain; 26, driven sprocket; 27, lifting motor; 28, manual drive shaft; 29, transverse drive shaft; 31, sliding... 32. Pulley support track base plate; 33. Pulley; 321. Bending part; 41. Side clamping motor; 42. Side clamping reducer; 43. Side clamping drive shaft; 44. Side clamping drive gear; 45. Side clamping lever; 451. Side clamping driven gear part; 452. Lever part; 453. First part; 454. Second part; 46. Side clamping chain sprocket transmission mechanism; 51. Door panel lower limit; 52. Door panel upper limit; 61. Door panel vertical sealing strip; 62. Door panel inter-sealing strip. Detailed Implementation

[0069] The technical solution of this utility model will now be clearly and completely described with reference to the accompanying drawings. Obviously, the described embodiments are only some, not all, of the embodiments of this utility model. Based on the embodiments of this utility model, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of this utility model.

[0070] In the description of this utility model, it should be understood that the orientation or positional relationship indicated by terms such as "upper", "lower", "left", "right", "inner", "outer", "front", "back", "horizontal", and "vertical" are based on the orientation or positional relationship shown in the accompanying drawings and are only for the convenience of describing this utility model, and are not intended to indicate or imply that the device or component referred to must have a specific orientation, and therefore should not be construed as a limitation of this utility model.

[0071] It should be noted that the terms "horizontal" and "vertical" in this utility model are used to describe approximate positional relationships, and not strictly "horizontal plane" or "vertical plane".

[0072] Please see Figures 1 to 16 The diagram shows a preferred embodiment of a folding flap door, comprising: a base 101, a drive box 102, a first door panel 11, a second door panel 12, and a lifting shaft 13. The base 101 is disposed within a pit; a drive box 102 is provided on each side of the base 101; the lower end of the first door panel 11 is disposed within the base and is rotatably arranged; the lower end of the second door panel 12 is rotatably connected to the upper end of the first door panel 11; and the lifting shaft 13 is rotatably provided on the upper end of the second door panel 12.

[0073] The first door panel 11 and the second door panel 12 are foldable and can be operably unfolded and arranged vertically for water blocking; or they can be operably folded up and down and stored inside the base 101, at which time the upper surface of the second door panel 12 forms the ground.

[0074] The lifting shaft 13 can move vertically to drive the upper end of the second door panel 12 to move vertically, thereby allowing the first door panel 11 and the second door panel 12 to unfold or fold.

[0075] Specifically, hinges are arranged between the first door panel 11 and the base 101, and between the first door panel 11 and the second door panel 12.

[0076] Furthermore, as a preferred embodiment, the folding flap door also includes a drive mechanism, wherein each drive box 102 is provided with a drive mechanism, which drives the lifting shaft 13 to rise or fall.

[0077] Furthermore, as a preferred embodiment, each drive mechanism includes: a lifting reducer 21 and a first lifting drive shaft steering gear 22, wherein the lifting reducer 21 and the first lifting drive shaft steering gear 22 are connected via a first drive shaft 221.

[0078] Furthermore, as a preferred embodiment, each drive mechanism includes: a second lifting drive shaft steering gear 23, wherein the first lifting drive shaft steering gear 22 and the second lifting drive shaft steering gear 23 are connected via a second drive shaft 231.

[0079] Furthermore, as a preferred embodiment, each drive mechanism includes a drive sprocket 24, which is connected to the lifting reducer 21 in a transmission manner.

[0080] Furthermore, as a preferred embodiment, each drive mechanism includes: a door panel lifting chain 25, which is wrapped around the drive sprocket 24, and the lifting shaft 13 is fixedly connected to the door panel lifting chain 25.

[0081] Furthermore, as a preferred embodiment, each drive mechanism includes a driven sprocket 26, which rotates synchronously with the drive sprocket via the door panel lifting chain 25.

[0082] Furthermore, as a preferred embodiment, it also includes a lifting motor 27, which is connected in transmission to a lifting reducer 21 of one of the two drive mechanisms.

[0083] Furthermore, as a preferred embodiment, it further includes: a manual drive shaft 28, which is connected to the first lifting drive shaft steering gear 22.

[0084] Furthermore, as a preferred embodiment, it further includes: a transverse drive shaft 29, the two ends of which are respectively connected to the second lifting drive shaft steering gear 23 of the two drive mechanisms;

[0085] Furthermore, in a preferred embodiment, the lifting motor 27 controls the rotation of the drive sprocket 24 via the lifting reducer 21.

[0086] Furthermore, in a preferred embodiment, when the lifting motor 27 is released, the manual drive shaft 28 controls the rotation of the drive sprocket 24 through the first lifting drive shaft steering gear 23, the first drive shaft 221, and the lifting reducer 21.

[0087] Specifically, the lifting motor 27 drives the lifting reducer 21 to work, and the lifting reducer 21 has two output ports.

[0088] More specifically, one of the output ports of the lifting reducer 21 is connected to the drive sprocket 24 to drive the drive sprocket 24 to rotate. Through the cooperation of the door panel lifting chain 25 and the driven sprocket 26, the lifting shaft 13 connected to the lifting chain 25 is driven to rise or fall in the vertical direction, thereby driving the first door panel 11 and the second door panel 12 to unfold or fold.

[0089] More specifically, the other output port of the lifting reducer 21 is connected to the first lifting drive shaft 22, and is driven sequentially through the first drive shaft 221, the second lifting drive shaft steering gear 23, the second drive shaft 231, and the second lifting drive shaft steering gear 23. The two lifting drive shaft steering gears 23 on both sides are connected by two transverse drive shafts 29 to achieve synchronous operation of the door panel lifting chains 25 on both sides.

[0090] Specifically, the first lifting drive shaft steering device 22 has one input port and two output ports. The input port is connected to the first drive shaft 221, one of the output ports is connected to the second drive shaft 231, and the other output port is connected to the manual drive shaft 28, so that the rotation of the manual drive shaft 28 can independently control the rotation of the drive sprocket 24 when the lifting motor 27 is released.

[0091] Specifically, after the second door panel 12 rises, due to the rotatable connection between the second door panel 12 and the first door panel 11, the first door panel 11 and the second door panel 12 form a triangular support during the rising process.

[0092] Specifically, the lower end of the first door panel 11 is fixed and can only rotate. When the first door panel 11 is flipped, the bottom sealing strip of the first door panel 11 presses against the sealing surface of the base.

[0093] More specifically, the bottom sealing strip, the base sealing surface, and the door panel vertical sealing strip 61 and the door panel inter-sealing strip 62 described below are all on the same plane.

[0094] Preferably, after the first door panel 11 and the second door panel 12 are lifted, the vertical sealing strips 61 on the left and right sides of the door panel and the bottom sealing strip form a U-shaped seal, which completely fits the door panel sealing surface 104 and the base sealing surface.

[0095] Furthermore, as a preferred embodiment, each drive mechanism includes: a pulley support track base plate 31, on which a pulley support track 32 is provided.

[0096] Furthermore, as a preferred embodiment, each drive mechanism includes a pulley 33, with a pulley 33 provided at both ends of the lifting shaft 13, and the pulley 33 being disposed within the pulley support rail 32.

[0097] Furthermore, in a preferred embodiment, the upper end of the pulley support track 32 has a bend 321, which is arranged toward the door panel sealing surface.

[0098] Specifically, the bending portion 321 forces the upper part of the second door panel 12 to fit as closely as possible to the door panel sealing surface 104.

[0099] Furthermore, as a preferred embodiment, it also includes: a door panel side pressing mechanism, wherein each drive box is provided with a door panel side pressing mechanism.

[0100] Furthermore, as a preferred embodiment, each door panel side pressing mechanism includes: a side pressing motor 41 and a side pressing reducer 42, with the side pressing motor 41 and the side pressing reducer 42 being connected in a transmission manner.

[0101] Furthermore, as a preferred embodiment, each door panel side pressing mechanism includes: a side pressing drive shaft 43, which is connected to a side pressing reducer 42.

[0102] Furthermore, as a preferred embodiment, each door panel side pressing mechanism includes: a side pressing drive gear 44, which is fixed on the side pressing transmission shaft 43.

[0103] Furthermore, in a preferred embodiment, each door panel side pressing mechanism includes a side pressing lever 45, which includes a side pressing driven gear part 451 that meshes with the side pressing drive gear 44, and a lever part 452 connected to the side pressing driven gear part 451.

[0104] Specifically, the side-pressure motor 41 drives the side-pressure reducer 42, the side-pressure reducer 42 drives the side-pressure transmission shaft 43, the side-pressure transmission shaft 43 drives the side-pressure drive gear, and further drives the side-pressure lever 45 to rotate. The side-pressure lever 45 is operable to abut against the back surface of the first door panel 11 and / or the second door panel 12, so that the first door panel 11 and / or the second door panel 12 are in contact with the door panel sealing surface 104.

[0105] More specifically, in this embodiment, the side-pressing lever 45 is operably pressed against the first door panel 11. The second door panel 12 achieves a tighter seal through the cooperation of the pulley 33 and the bent portion 321 of the pulley support rail 32, while the first door panel 11 achieves a tighter seal through the side-pressing lever 45.

[0106] Preferably, the side-pressing lever 45 abuts against the upper end of the first door panel 11, especially at the connection between the first door panel 11 and the second door panel 12.

[0107] Furthermore, as a preferred embodiment, the lever portion 452 includes: a first portion 453, the first portion 453 being rod-shaped, one end of the first portion 453 being fixedly connected to the side-pressing driven gear portion 451.

[0108] Furthermore, as a preferred embodiment, the lever portion 452 includes: a second portion 454, the second portion 454 being arc-shaped, one end of the second portion 454 being fixedly connected to the other end of the first portion 453, and the other end of the second portion 454 being operably abutting against the first door panel 11 and / or the second door panel 12.

[0109] Furthermore, in a preferred embodiment, the tangent direction of one end of the second portion 454 is perpendicular to the axial direction of the first portion 453.

[0110] Furthermore, as a preferred embodiment, the drive housing 102 is provided with a side clamping hole 103, and the second part 454 extends operably from the side clamping hole 103.

[0111] Furthermore, as a preferred embodiment, the side-clamping motor 41 is located at the upper part of the drive box 102, and the side-clamping reducer 42 is located at the middle part of the drive box 102.

[0112] Furthermore, as a preferred embodiment, the side clamping motor 41 and the side clamping reducer 42 are connected by a side clamping chain sprocket transmission mechanism 46.

[0113] Furthermore, as a preferred embodiment, the lifting shaft 13 is operably positioned in the lowermost first position and the uppermost second position.

[0114] Furthermore, as a preferred embodiment, it also includes a lower door panel limit 51 that matches a first position of the lifting shaft 13, and an upper door panel limit 52 that matches a second position of the lifting shaft 13.

[0115] Specifically, the lifting shaft 13 is operably abutted against the lower limit 51 or the upper limit 52 of the door panel to limit the position of the first door panel 11 and the second door panel 12.

[0116] Specifically, as the second door panel 12 rises, the angle between the first door panel 11 and the second door panel 12 gradually increases, almost forming a plane. The lifting shaft 13 triggers the upper limit position 52 of the door panel, and the upper limit position 52 of the door panel sends a command to the lifting motor 27, and the lifting motor 27 stops working.

[0117] Furthermore, as a preferred embodiment, one of the two door panel side pressing mechanisms has a first side pressing limit for controlling the side pressing lever 45 to be pressed into place.

[0118] Furthermore, as a preferred embodiment, another of the two door panel side clamping mechanisms has a second side clamping limit for controlling the side clamping lever 45 to retract into place.

[0119] Furthermore, as a preferred embodiment, it also includes: a side-clamping manual rotating shaft, which is connected to the side-clamping reducer 42. It is used to operate the side-clamping drive gear 44 and the side-clamping lever 45 through the side-clamping reducer 42 when the side-clamping motor 41 is released, so as to realize manual side clamping.

[0120] Furthermore, as a preferred embodiment, the inner walls of both drive boxes 102 extend toward the middle of the two drive boxes 102 to form a door panel sealing surface 104.

[0121] Furthermore, as a preferred embodiment, both the first door panel 11 and the second door panel 12 are provided with door panel vertical sealing strips 61 facing the door panel sealing surface 104; the upper end of the first door panel 11 and the lower end of the second door panel 12 are also provided with door panel sealing strips 62.

[0122] The above description is only a preferred embodiment of the present utility model and does not limit the implementation method and protection scope of the present utility model. Those skilled in the art should realize that all solutions obtained by equivalent substitutions and obvious changes made based on the description and illustrations of the present utility model should be included within the protection scope of the present utility model.

Claims

1. A folding flap door, characterized in that, include: A base, wherein the base is disposed within the foundation pit; A drive box is provided on each side of the base; The first door panel, the lower end of which is disposed within the base and is rotatably arranged; The second door panel, the lower end of which is rotatably connected to the upper end of the first door panel; The lifting shaft is rotatably provided at the upper end of the second door panel; The drive mechanism is provided inside each drive box, and the drive mechanism drives the lifting shaft to rise or fall. Each of the aforementioned drive mechanisms includes: Lifting reducer; The first lifting drive shaft steering gear is connected to the first lifting drive shaft steering gear via a first drive shaft; The second hoisting drive shaft steering gear is connected to the first hoisting drive shaft steering gear via a second drive shaft. A drive sprocket, which is connected to the lifting reducer in a driving manner; A door panel lifting chain, wherein the door panel lifting chain is wrapped around the drive sprocket, and the lifting shaft is fixedly connected to the door panel lifting chain; The driven sprocket rotates synchronously with the driving sprocket via the lifting chain of the door panel; It also includes: a lifting motor, which is connected to the lifting reducer of one of the two drive mechanisms; It also includes: a manual drive shaft, which is connected to the steering gear of the first lifting drive shaft; It also includes: a transverse drive shaft, the two ends of which are respectively connected to the second lifting drive shaft steering gear of the two drive mechanisms; The hoisting motor controls the rotation of the drive sprocket through a hoisting reducer; When the hoisting motor is released, the manual drive shaft controls the rotation of the drive sprocket through the first hoisting drive shaft steering gear, the first drive shaft, and the hoisting reducer.

2. The folding flap door according to claim 1, characterized in that, Each of the aforementioned drive mechanisms includes: A pulley support rail base plate, wherein a pulley support rail is provided on the pulley support rail base plate; The lifting shaft has a pulley at each end, and the pulleys are located within the pulley support rail. The upper end of the pulley support track has a bent portion, which is arranged towards the door panel sealing surface.

3. The folding flap door according to claim 1, characterized in that, Also includes: A door panel side pressing mechanism is provided inside each of the drive boxes; Each of the door panel side pressing mechanisms includes: Side-press motor; A side-clamping reducer, wherein the side-clamping motor is connected to the side-clamping reducer in a transmission manner; A side-clamping drive shaft is connected to the side-clamping reducer. A side-clamping drive gear is fixed on the side-clamping transmission shaft; A side-clamping lever, comprising: a side-clamping driven gear portion meshing with the side-clamping driving gear, and a lever portion connected to the side-clamping driven gear portion.

4. The folding flap door according to claim 3, characterized in that, The lever portion includes: The first part is rod-shaped, and one end of the first part is fixedly connected to the side-pressing driven gear part; The second part is arc-shaped, with one end of the second part fixedly connected to the other end of the first part, and the other end of the second part operably abutting against the first door panel and / or the second door panel; The tangent at one end of the second part is perpendicular to the axial direction of the first part.

5. The folding flap door according to claim 4, characterized in that, The drive box has a side clamping hole, and the second part extends operably from the side clamping hole.

6. The folding flap door according to claim 4, characterized in that, The side clamping motor is located at the top of the drive box, and the side clamping reducer is located in the middle of the drive box; The side-clamping motor and the side-clamping reducer are connected by a side-clamping chain and sprocket transmission mechanism.

7. The folding flap door according to claim 1, characterized in that, The lifting shaft is operably positioned in the lowermost first position and the uppermost second position; It also includes a lower limit position of the door panel that matches the first position of the lifting shaft, and an upper limit position of the door panel that matches the second position of the lifting shaft.

8. The folding flap door according to claim 3, characterized in that, One of the two door panel side clamping mechanisms has a first side clamping limit for controlling the side clamping lever to be clamped into place; The other of the two door panel side clamping mechanisms has a second side clamping limit for controlling the side clamping lever to retract into place.

9. The folding flap door according to claim 2, characterized in that, The inner walls of both drive boxes extend toward the center of the two drive boxes to form the door panel sealing surface.

10. The folding flap door according to claim 1, characterized in that, Both the first door panel and the second door panel are provided with vertical sealing strips facing the sealing surface of the door panel; the upper end of the first door panel and the lower end of the second door panel are also provided with inter-door panel sealing strips.

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