Door lever device and windproof door of nuclear power plant

Abstract

The utility model relates to a door lever device and a windproof door of a nuclear power plant. The door lever device comprises a windproof lever, a first support and a second support. The first bracket and the second bracket respectively comprise a limiting structure and a mounting base, and the limiting structure is movably arranged on the mounting base; the door lever device has a first state and a second state; when the door lever device is in the first state, limiting spaces are defined between the mounting bases of the first support and the limiting structures and between the mounting bases of the second support and the limiting structures, and the two ends of the windproof lever are detachably inserted into the limiting spaces of the first support and the limiting spaces of the second support respectively. And when the door lever device is in the second state, the limiting structures of the first bracket and the second bracket are adjacently attached to the mounting base and / or the mounting surface. Mutual collision between the door body and the door lever device can be reduced, and damage is avoided.

Description

TECHNICAL FIELD

[0001] The utility model relates to nuclear power technology field especially is a door lever device and nuclear power plant windproof door. BACKGROUND

[0002] In nuclear power plant, because under the influence of typhoon weather, so set the door lever on the factory building door facing the outside, to prevent typhoon wind too big, lead to the room door is opened to the outside by typhoon, cannot resist the invasion of typhoon.

[0003] The door lever in nuclear power plant is installed in T3 stage (i.e. 24 hours, the average wind force along the coast or land reaches 8 levels above, or gust 10 levels above and possibly continues), and the rest of the time, the door lever needs to be removed and placed aside, so as not to affect the opening of the door and the passage.

[0004] Because under normal circumstances, the personnel or transport goods of nuclear power plant are more frequent, and the door needs to be completely opened. The current door lever setting causes the fixed support of the door lever to be squeezed when the door is completely opened, which leads to deformation of the door panel or the fixed support of the door lever, affecting the normal function of the door or the door lever (some are fireproof doors, which need to ensure their fireproof performance). UTILITY MODEL CONTENTS

[0005] The utility model solves the technical problem to provide an improved door lever device and nuclear power plant windproof door.

[0006] The utility model adopts the following technical scheme:

[0007] A door lever device is constructed, comprising:

[0008] A windproof lever; and

[0009] A first support and a second support are respectively installed on opposite sides of the door body, the first support and the second support respectively include a limiting structure and a mounting base provided on a mounting surface, and the limiting structure is movably provided on the mounting base;

[0010] The door lever device includes a first state and a second state.

[0011] When the door lever device is in the first state, a limiting space is defined between the mounting base and the limiting structure of the first support, a limiting space is defined between the mounting base and the limiting structure of the second support, and both ends of the windproof lever are respectively detachably inserted into the limiting space of the first support and the second support.

[0012] When the door pole device is in the second state, the limiting structure of the first support is arranged adjacent to the mounting base and / or the mounting surface, and the limiting structure of the second support is arranged adjacent to the mounting base and / or the mounting surface.

[0013] In some embodiments, the first support and the second support each comprise two connecting structures, first ends of the two connecting structures are rotatably connected to two ends of the limiting structure respectively, and second ends are rotatably connected to end portions of the two mounting bases which are close to each other respectively.

[0014] In some embodiments, the first support and the second support are double-crank structures.

[0015] In some embodiments, the first support and the second support each further comprise a blocking structure, the blocking structure is located on a side of the first support and the second support which is away from the door body, and is rotatably connected to the limiting structure or the mounting base respectively, and a distance between the blocking structure of the first support and the blocking structure of the second support is matched with a length of the windproof pole.

[0016] In some embodiments, at positions corresponding to the first support and the second support of the windproof pole, bottom ends are concave upward to form limiting grooves.

[0017] In some embodiments, a cross section of the windproof pole perpendicular to a length direction is a polygon.

[0018] In some embodiments, the first support and the second support are oppositely arranged in a vertical direction.

[0019] A windproof door for a nuclear power plant is constructed, comprising a door body and at least one door pole device according to any one of the preceding embodiments.

[0020] In some embodiments, the door pole device is arranged on an outdoor side of the door body.

[0021] In some embodiments, the door body comprises a first door panel and a second door panel, the first support is arranged on a wall surface on a side of the first door panel which is away from the second door panel, and the second support is arranged on a wall surface on a side of the second door panel which is away from the first door panel.

[0022] The utility model has the following advantages:

[0023] This invention features movable mounting bases and limiting structures for the first and second brackets, allowing for selective definition of the limiting space. When the door bar device is needed, the movable limiting structure defines the limiting space for inserting the limiting windproof bar. When the door bar device is not needed, by attaching the limiting structure adjacent to the mounting base, the horizontal space occupied by the first and second brackets can be reduced, allowing them to fit as close as possible to the mounting surface (door frame, wall, etc.), minimizing the protrusion relative to the mounting surface, and thus reducing collisions between the door and the door bar device, preventing damage. Attached Figure Description

[0024] To more clearly illustrate the technical solution of this utility model, the present utility model will be further described below in conjunction with the accompanying drawings and embodiments. It should be understood that the following drawings only show some embodiments of this utility model and should not be considered as a limitation of the scope. For those skilled in the art, other related drawings can be obtained from these drawings without creative effort. In the drawings:

[0025] Figure 1 This is a structural schematic diagram of a nuclear power plant windproof door according to one embodiment of the present invention;

[0026] Figure 2 yes Figure 1 A schematic diagram of the structure of the first support in a first state in one embodiment;

[0027] Figure 3 yes Figure 2 The diagram shown is a structural schematic of the first support in the second state.

[0028] Figure 4 yes Figure 1 A schematic diagram of the structure of the first support in a first state in another embodiment;

[0029] Figure 5 yes Figure 1 A schematic diagram of the gate lever device in another embodiment. Detailed Implementation

[0030] To provide a clearer understanding of the technical features, objectives, and effects of this utility model, the specific embodiments of this utility model are now described in detail with reference to the accompanying drawings. In the following description, it should be understood that the orientations or positional relationships indicated by terms such as "front," "rear," "upper," "lower," "left," "right," "vertical," "horizontal," "bottom," "inner," "inside," and "outer" are based on the orientations or positional relationships shown in some of the accompanying drawings, and are constructed and operated in a specific orientation. They are only for the convenience of describing this technical solution and do not indicate that the device or component referred to must have a specific orientation; therefore, they should not be construed as limitations on this utility model.

[0031] It should be further noted that unless otherwise explicitly specified and limited, the terms "mounting", "connecting", "connecting", "fixing", "setting" and the like should be understood in a broad sense, for example, it can be fixedly connected, or it can be detachably connected, or it can be integrated; it can be mechanically connected, or it can be electrically connected; it can be directly connected, or it can be indirectly connected through an intermediate medium, or it can be the internal communication of two elements or the interaction relationship between two elements. When an element is referred to as "on" or "below" another element, the element can be "directly" or "indirectly" above the other element, or there can be one or more intervening elements. The terms "first", "second", etc. are only for the convenience of describing the technical solutions, and cannot be understood as indicating or implying relative importance or implicitly indicating the number of the indicated technical features. Therefore, the features with "first", "second", etc. can be explicitly or implicitly included one or more of the features. For those skilled in the art, the specific meaning of the above terms in the present application can be understood according to the specific circumstances.

[0032] In the following description, specific details are set forth such as specific system structures, techniques, etc. in order to provide a thorough understanding of the embodiments of the present application for purposes of explanation, but not for limitation. However, it should be clear to those skilled in the art that the present application can also be implemented in other embodiments without these specific details. In other cases, detailed descriptions of well-known systems, devices, circuits and methods are omitted to avoid unnecessary details that hinder the description of the present application.

[0033] Figures 1 to 3 A door lever device 1 in an embodiment of the present application is shown, which can be applied to the door of a factory building to resist the invasion of strong winds such as typhoons. The door lever device 1 can include a windproof lever 10, a first support 20 and a second support 30. Among them, the first support 20 and the second support 30 can be respectively installed on the opposite sides of the door body 2 for supporting the windproof lever 10. The windproof lever 10 can be horizontally arranged on one side of the door body 2 through the support of the first support 20 and the second support 30 to resist the typhoon on that side and avoid the opening of the door body 2.

[0034] Among them, the first support 20 and the second support 30 each include a limiting structure 22 and a mounting base 21. The mounting base 21 is arranged on the mounting surface, and the limiting structure 22 is movably arranged on the mounting base 21. Through the movement of the limiting structure 22 relative to the mounting base 21, the door lever device 1 can include a first state and a second state.

[0035] As Figure 2As shown, when the door pole device 1 is in the first state, the mounting base 21 and the limiting structure 22 of the first support 20 define a limiting space 200, and the mounting base 21 and the limiting structure 22 of the second support 30 also define a limiting space 200. The two ends of the windproof pole 10 are respectively detachably inserted into the limiting space 200 of the first support 20 and the limiting space 200 of the second support 30. At this time, the windproof pole 10 is horizontally arranged on one side of the door body 2 through the first support 20 and the second support 30, so as to play a role of resisting typhoon.

[0036] As shown, when the door pole device 1 is in the first state, the mounting base 21 and the limiting structure 22 of the first support 20 define a limiting space 200, and the mounting base 21 and the limiting structure 22 of the second support 30 also define a limiting space 200. The two ends of the windproof pole 10 are respectively detachably inserted into the limiting space 200 of the first support 20 and the limiting space 200 of the second support 30. At this time, the windproof pole 10 is horizontally arranged on one side of the door body 2 through the first support 20 and the second support 30, so as to play a role of resisting typhoon. Figure 3

[0037] It should be understood that the mounting surface 3 can be a wall provided with the door body 2, can be a door frame 203, and can also be the door body 2 itself, which is not limited here.

[0038] It should be understood that when the door pole device 1 is in the second state, the mutual abutment of the limiting structure 22 and the mounting base 21 can be understood as that there is no space (hole structure) between the limiting structure 22 and the mounting base 21, or the space defined therebetween is smaller than the size of the limiting space 200 capable of inserting the windproof pole 10. It can also be understood that there is mutual contact between the limiting structure 22 and the mounting base 21. It can also be understood that there is mutual contact between the limiting structure 22 and the mounting surface provided with the mounting base 21, and the like.

[0039] The present application can selectively define the limiting space 200 by designing the first support 20 and the second support 30 with the mounting base 21 and the limiting structure 22 that can move relative to each other. When the door pole device 1 needs to be used, the limiting structure 22 is moved to define the limiting space 200 to insert the limiting windproof pole 10. When the door pole device 1 does not need to be used, the limiting structure 22 is arranged adjacent to the mounting base 21, thereby reducing the occupation of the horizontal space by the first support 20 and the second support 30, making them as close as possible to the mounting surface (door frame surface, wall surface, etc.), and reducing the protrusion amplitude relative to the mounting surface. When the door body 2 is opened and closed daily, if the door body 2 is rotated greatly, the reduction of the protrusion amplitude of the first support 20 and the second support 30 relative to the mounting surface can reduce the possibility of collision between the door body 2 and the mounting surface, thereby reducing the possibility of damage to the door body 2 and the first support 20 and the second support 30 in daily use.

[0040] As​Figure 1 As shown, in some embodiments, the windproof bar 10 is a long rod with a hollow interior to reduce its weight and facilitate disassembly and assembly.

[0041] exist Figure 1 In the embodiment shown, the windproof bar 10 has a rectangular cross-section perpendicular to its length.

[0042] In some other alternative embodiments, the cross-section of the windproof bar 10 may also be set in other shapes such as equilateral triangle, circle, regular polygon, etc., to improve its structural rigidity and reduce the risk of being bent and damaged.

[0043] In some other alternative embodiments, the windproof bar 10 may also be configured as a solid rod-shaped structure, or its hollow interior may be filled with a low-weight material that is rigid but has low density to improve its overall structural strength.

[0044] It should be understood that the structure of the first support 20 and the second support 30 can be the same. Now, let's take... Figures 2 to 4 Taking the specific structure of the first support 20 shown as an example, the first support 20 and the second support 30 will be further explained.

[0045] like Figure 2 As shown, in some embodiments, the first bracket 20 (second bracket 30) has two mounting bases 21, which are spaced apart in the vertical direction (gravity direction) and the distance between them is adapted to the length of the limiting structure 22. The first bracket 20 (second bracket 30) may also include two connecting structures 23, through which the limiting structure 22 is movably connected to the mounting base 21.

[0046] The two connecting structures 23 are now defined as the first connecting structure 231 and the second connecting structure 232, respectively, and the two mounting bases 21 are defined as the first mounting base 211 and the second mounting base 212, respectively.

[0047] The first end of the first connecting structure 231 is rotatably connected to the first end of the limiting structure 22, and the second end of the first connecting structure 231 is rotatably connected to the end of the first mounting base 211 near the second mounting base 212. The first end of the second connecting structure 232 is rotatably connected to the second end of the limiting structure 22, and the second end of the second connecting structure 232 is rotatably connected to the end of the second mounting base 212 near the first mounting base 211.

[0048] exist Figure 2In the embodiment shown, the mounting base 21, the limiting structure 22, and the connecting structure 23 are all longitudinally elongated rods. The combination of these components forms a double crank structure, which can automatically return to the second state under the action of gravity when the windproof bar 10 is not installed.

[0049] In some other alternative embodiments, the mounting base 21, and / or the limiting structure 22, and / or the connecting structure 23 may also be configured as a rectangular plate structure to improve its overall structural strength.

[0050] In some other alternative embodiments, the number of the first bracket 20 and the second bracket 30 can be set to at least two, and they can be arranged along the extension direction of the windproof bar 10, which can also improve the overall support strength of the windproof bar 10.

[0051] In some other alternative embodiments, the number of mounting bases 21 may be set to only one, and the two ends of the limiting structure 22 may be rotatably connected to the mounting base 21 respectively.

[0052] In some other alternative embodiments, the connecting structure 23 can also be configured as a flexible connector such as a hinge. When the windproof bar 10 is removed from the limiting space 200, the limiting structure 22 can also automatically return to the second state through the two flexible connecting structures 23.

[0053] In some alternative embodiments, only one connecting structure 23 may be provided, and it may be configured as a flexible hinge structure. The connecting structure 23, the limiting structure 22, and the mounting base 21 are connected in pairs sequentially to each other. When the door bar device 1 is in the first state, the three can form a triangular limiting space 200. In this embodiment, the windproof bar 10 can be inserted into the limiting space 200 by adjusting its cross-sectional size or shape. Simultaneously, in the second state, the limiting structure 22 and the mounting base 21 can be brought into contact by bending the flexible connecting structure 23.

[0054] In some other alternative embodiments, the connecting structure 23 may be omitted, and the limiting structure 22 may be set as a longitudinal hinge, so that its two ends are connected to the two ends of the mounting base 21 respectively, and the length of the limiting structure 22 may be controlled so that when it defines the limiting space 200 with the mounting base 21, the windproof bar 10 can be inserted.

[0055] It should be understood that the first connecting structure 231 and the second connecting structure 232 are rotatably connected to the limiting structure 22, and the first connecting structure 231 and the second connecting structure 232 are rotatably connected to the first mounting base 211 and the second mounting base 212, which can be achieved by setting a pivot, hinge, etc., and no specific limitation is made here.

[0056] It should be understood that the relative fixation between the mounting base 21 and the mounting surface can be achieved by setting up connection structures such as bolts and pins, and no specific limitation is made here.

[0057] like Figure 4 As shown, in some embodiments, the first support 20 (second support 30) may further include a blocking structure 24, which is located on the side of the first support 20 away from the door body 20 / second support 30 (the blocking structure 24 of the second support 30 is located on the side of the second support 30 away from the door body 20 / first support 20), used to block the end of the limiting space 200 and limit it in the length direction of the windproof bar 10. This can prevent the windproof bar 10 from moving out of the limiting space 200 along its length direction under the action of a typhoon in the first state.

[0058] Specifically, in Figure 4 In the described embodiment, the blocking structure 24 is rotatably connected to the limiting structure 22 to block the end of its limiting space 200 away from the door body 2. The distance between the blocking structure 24 of the first bracket 20 and the blocking structure 24 of the second bracket 30 can be adapted to the length of the windproof bar 10. When the door bar device 1 is in the first state, the two ends of the windproof bar 10 are respectively housed in the limiting spaces 200 of the first bracket 20 and the second bracket 30, and the displacement of the windproof bar 10 along its length direction is limited by the blocking structures 24 of the first bracket 20 and the second bracket 30.

[0059] When the door bar device 1 is in the second state, since the limiting structure 22 is adjacent to the mounting base 21 and / or mounting surface 3, the sealing structure 24 can be rotated so that the sealing structure 24 and the limiting structure 22 are approximately on the same plane, thereby making the sealing structure 24 approximately adjacent to the mounting base 21 and / or mounting surface 3, thus reducing the protrusion of the sealing structure 24 and avoiding damage when the door 2 is opened and closed.

[0060] It is important to understand that, in Figure 4In the illustrated embodiment, the limiting space 200 is generally rectangular, and the blocking structure 24 is correspondingly configured as a rectangular plate, with one side rotatably connected to the limiting structure 22. When the door bar device 1 is in the first state, at least one of the remaining three sides of the blocking structure 24 may exist and be detachably connected to the connecting structure 23, the mounting base 21, or the mounting surface.

[0061] For example, when the gate device 1 is in the first state, at least one bolt or other connecting component can be provided at the corresponding position of the blocking structure 24 and the connecting structure 23 to achieve a detachable connection between the two, thereby realizing the relative positioning of the blocking structure 24 in this state.

[0062] For example, a connecting plate (or connecting rod) can be rotatably provided on the side of the blocking structure 24 away from the limiting structure 22. When the gate device 1 is in the first state, the connecting plate (or connecting rod) can be connected to the mounting base 21 (or mounting surface) by bolts or other connecting parts, which can also achieve the relative positioning of the blocking structure 24 in this state.

[0063] In some other alternative embodiments, the blocking structure 24 can also be configured as a rod-shaped, column-shaped, chain-shaped or other structure, located in the middle of one side of the limiting space 200 in the first state, and can also limit the windproof bar 10 in the limiting space 200.

[0064] It should be understood that the blocking structure 24 and the limiting structure 22 are rotatably connected, which can be achieved by setting a connecting part such as a pivot or hinge, and no specific limitation is made here.

[0065] like Figure 5 As shown, in some other optional embodiments, the bottom end of the windproof bar 10 is recessed upwards at the positions corresponding to the first bracket 20 and the second bracket 30 to form a limiting groove 11. When the windproof bar 10 is inserted into the first bracket 20 and the second bracket 30, it can move downwards under the action of gravity, so that the first bracket 20 and the second bracket 30 are respectively locked in the corresponding limiting groove 11, thereby limiting the windproof bar 10 in the length direction. In this way, in the first state, the windproof bar 10 can be prevented from moving out of the limiting space 200 along its length direction under the action of a typhoon.

[0066] like Figure 1 As shown, in some embodiments, the first bracket 20 and the second bracket 30 are respectively arranged in the vertical direction, such that when the door bar device 1 is in the first state, the extension direction of the windproof bar 10 is perpendicular to the direction of gravity.

[0067] In some other alternative embodiments, the positions of the first bracket 20 and the second bracket 30 in the vertical direction may not correspond, so that the windproof bar 10 is inclined and set on one side of the door body 2.

[0068] It is necessary to understand that Figure 1 The example of the main gate of a nuclear power plant building is used for illustration, but it should not be regarded as a limitation on the application of the gate lever device 1 constructed in this application. The gate lever device constructed in this application can also be applied to other gates with windproof requirements.

[0069] like Figure 1 As shown, this application also constructs a windproof door for nuclear power plants, which can be applied to the plant buildings of nuclear power plants to provide protection in typhoon environments.

[0070] The nuclear power plant windproof door may include a door body 2 and at least one door bar device 1 as described in any of the foregoing embodiments. The door bar device 1 may be installed on one side of the door body 2 to provide protection against typhoons.

[0071] exist Figure 1 In the embodiment shown, the door bar device 1 is located on the outdoor side of the door body 2 to work with the door lock on the indoor side of the door body 2 to achieve the effect of typhoon protection and improve the overall structural strength of the windproof door of the nuclear power plant.

[0072] In some other alternative embodiments, the door bar device 1 may be provided only on the indoor side of the door body 2, or at least one may be provided on both the indoor and outdoor sides of the door body 2.

[0073] In some embodiments, the door body 2 may include a first door panel 201, a second door panel 202, and a door frame 203, wherein the first door panel 201 and the second door panel 202 are disposed within the door frame 203, the side of the first door panel 201 opposite to the second door panel 202 is rotatably disposed on the door frame 203, and the side of the second door panel 202 opposite to the first door panel 201 is rotatably disposed on the door frame 203.

[0074] The first bracket 20 is installed on the wall of the first door panel 201 on the side away from the second door panel 202, and the human support 30 is set on the wall of the second door panel 202 on the side away from the first door panel 201.

[0075] In some other alternative embodiments, the first bracket 20 may also be disposed on the door frame 203 on the side of the first door panel 201 opposite to the second door panel 202, and the second bracket 30 may also be disposed on the door frame 203 on the side of the second door panel 202 opposite to the first door panel 201. The first bracket 20 and the second bracket 30 may also be disposed on the first door panel 201 and the second door panel 202 respectively.

[0076] In some other alternative embodiments, the nuclear power plant windproof door may also include multiple door lever devices 1. When multiple door lever devices 1 are located on the same side of the door body 2, they may be arranged at intervals in the vertical direction or in a crisscross pattern. When multiple door lever devices 1 are located on both sides of the door body 2, the number of door lever devices 1 on both sides of the door body 2 may be the same or different.

[0077] In some other alternative embodiments, the door 2 may also include only the first door panel 201 or the second door panel 202, forming a single-door structure.

[0078] It is understood that the above embodiments only illustrate preferred embodiments of the present utility model, and their descriptions are relatively specific and detailed, but they should not be construed as limiting the scope of the present utility model patent. It should be noted that for those skilled in the art, the above technical features can be freely combined, and several modifications and improvements can be made without departing from the concept of the present utility model, all of which fall within the protection scope of the present utility model. Therefore, all equivalent transformations and modifications made within the scope of the claims of the present utility model should fall within the coverage of the claims of the present utility model.

Claims

1. A door bar device, characterized in that, include: Windproof bar (10); as well as A first bracket (20) and a second bracket (30) are respectively installed on opposite sides of the door body (2). The first bracket (20) and the second bracket (30) respectively include a limiting structure (22) and a mounting base (21) disposed on the mounting surface (3). The limiting structure (22) is movably disposed on the mounting base (21). The door bar device (1) includes a first state and a second state; When the door bar device (1) is in the first state, a limiting space (200) is defined between the mounting base (21) of the first bracket (20) and the limiting structure (22), and a limiting space (200) is defined between the mounting base (21) of the second bracket (30) and the limiting structure (22). The two ends of the windproof bar (10) are respectively detachably inserted into the limiting spaces (200) of the first bracket (20) and the second bracket (30). When the door bar device (1) is in the second state, the limiting structure (22) of the first bracket (20) is adjacent to the mounting base (21) and / or the mounting surface (3), and the limiting structure (22) of the second bracket (30) is adjacent to the mounting base (21) and / or the mounting surface (3).

2. The gate lever device according to claim 1, characterized in that, The first bracket (20) and the second bracket (30) each include two connecting structures (23). The first ends of the two connecting structures (23) are rotatably connected to the two ends of the limiting structure (22), and the second ends are rotatably connected to the ends of the two mounting bases (21) that are close to each other.

3. The gate lever device according to claim 2, characterized in that, The first support (20) and the second support (30) are double crank structures.

4. The gate lever device according to claim 1, characterized in that, The first bracket (20) and the second bracket (30) also include a blocking structure (24); the blocking structure (24) is located on the side of the first bracket (20) and the second bracket (30) away from the door body (2), and is rotatably connected to the limiting structure (22) or the mounting base (21); the distance between the blocking structure (24) of the first bracket (20) and the blocking structure (24) of the second bracket (30) is adapted to the length of the windproof bar (10).

5. The gate lever device according to any one of claims 1 to 4, characterized in that, At the positions corresponding to the first bracket (20) and the second bracket (30), the bottom end of the windproof bar (10) is recessed upward to form a limiting groove (11).

6. The gate lever device according to any one of claims 1 to 4, characterized in that, The cross-section of the windproof bar (10) perpendicular to its length direction is polygonal.

7. The gate lever device according to any one of claims 1 to 4, characterized in that, The first bracket (20) and the second bracket (30) are arranged opposite each other in the vertical direction.

8. A windproof door for nuclear power plants, characterized in that, It includes a door body (2) and at least one door lever device (1) as described in any one of claims 1 to 7.

9. The nuclear power plant windproof door according to claim 8, characterized in that, The door bar device (1) is located on the outdoor side of the door body (2).

10. The nuclear power plant windproof door according to claim 8, characterized in that, The door (2) includes a first door panel (201) and a second door panel (202); the first bracket (20) is disposed on the wall surface of the first door panel (201) away from the second door panel (202), and the second bracket (30) is disposed on the wall surface of the second door panel (202) away from the first door panel (201).

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