Retractable door system

Abstract

The door panel in the retractable door system provided by the present application includes a plurality of door panel units, the door panel units can be folded from an expanded state to a folded state along a rotating axis in a first direction, the projected area of the door panel units in the expanded state in the plane where the first direction is located is larger than the projected area of the door panel units in the folded state in the plane where the first direction is located, a plurality of the door panel units extend in a first direction and a second direction and are connected to form the door panel, the second direction being perpendicular to the first direction; and a door frame, a power device, and a control system for mounting the door panel. The retractable door system is suitable for use at the opening of a windbreak wall in a bulk cargo yard or a construction site, further reducing wind speed and dust in the yard, preventing dust in the yard or construction site from overflowing through the opening, while optimizing vehicle access management and meeting vehicle traffic through the opening and closing of the door.

Description

Technical Field

[0001] The present invention relates to the technical field of fixed closing devices used at openings in surrounding objects, and in particular to a retractable door system. Background Art

[0002] At bulk cargo yards or construction sites at ports and terminals, cargo and materials are stored outdoors, which can easily generate dust when blown by wind, causing environmental pollution. Therefore, windbreaks consisting of steel curtain walls and windproof mesh panels are used. These windbreaks surround the open-air yards, reducing wind speed and dust, thereby achieving environmental benefits. However, bulk cargo yards and construction sites require trucks to enter and exit, so multiple door openings are created in the windbreaks. These hollowed-out door openings fail to reduce wind speed, increasing dust and reducing environmental effectiveness.

[0003] In order to reduce the hollow area of the windbreak wall in the bulk cargo yard or construction site, further reduce the wind speed and reduce the dust in the yard, prevent the dust from the yard or construction site from overflowing through the door opening, and optimize the vehicle entry and exit management, a windbreak door will be installed at the door opening. The opening and closing of the windbreak door can meet the vehicle passage and environmental protection needs.

[0004] The working environment of the above-mentioned windproof doors includes:

[0005] 1. Windbreak walls are often installed in open-air storage yards or construction sites with high wind speeds. Therefore, the windbreak doors need to withstand a maximum wind speed of level 8, which places high demands on the rigidity of the windbreak doors.

[0006] 2. In open-air storage yards or construction sites, wind directions are changeable and the windproof doors may be subject to forces in different directions;

[0007] 3. The door opening is large, some can even reach 30m wide and 10m high;

[0008] 4. Used in dock yards or construction sites, the environment is harsh and dusty. Especially in dock yards, the air humidity is high and there may be salt mist in the air, which is highly corrosive to the windproof door. Summary of the Invention

[0009] The object of the present invention is to provide a retractable door system which has high rigidity, can withstand strong winds from different directions, has unlimited dimensional expansion and is corrosion-resistant, and is suitable for the working environment of windproof doors.

[0010] To achieve the above-mentioned object, the present invention provides a retractable door system, comprising:

[0011] A door panel comprising a plurality of door panel units, wherein the door panel units can be folded from an unfolded state to a folded state along a rotation axis in a first direction, wherein a projected area of the door panel units in the unfolded state within a plane in which the first direction lies is larger than a projected area of the door panel units in the folded state within the plane in which the first direction lies, and wherein a plurality of the door panel units extend in a first direction and a second direction and are connected to form the door panel, wherein the second direction is perpendicular to the first direction;

[0012] The door panel unit located on the uppermost row of the door panels is hoisted on the upper frame of the door frame, and both ends of the upper edge and / or lower edge of the door panel unit located on the leftmost and rightmost sides of the door panel are respectively connected to the left frame and the right frame of the door frame through cables;

[0013] a power device for driving the door panel to switch between an unfolded state and a folded state;

[0014] The control system is connected to the power device and controls the operation of the power device.

[0015] The first direction may be a horizontal direction, and the door panel unit may be folded or unfolded in a vertical direction. The second direction may be a vertical direction.

[0016] For bulk cargo yards or construction sites, the second direction can be vertical, thereby enclosing the bulk cargo yard or construction site together with the windbreak curtain wall. For the upper cover or lower bottom of a box or tank, the second direction can also be horizontal, thereby covering the upper opening of the box or tank, or enabling the box or tank to be opened and closed from below.

[0017] In one embodiment, the door panel unit has an array of ventilation holes.

[0018] The ventilation holes may be in the shape of circular holes, and the ventilation holes may be arranged at equal intervals and evenly arranged on the door panel unit.

[0019] In one embodiment, a projected area of the door panel unit in the expanded state within the plane where the first direction is located is less than twice a projected area of the door panel unit in the folded state within the plane where the first direction is located.

[0020] In this embodiment, in other words, the rotation axis for folding the door panel unit from the unfolded state to the folded state does not divide the door panel unit into two halves.

[0021] In one embodiment, the door panel unit comprises:

[0022] A first sub-door panel, comprising a first frame and a second frame respectively arranged on two parallel sides of the first sub-door panel;

[0023] The second sub-door panel comprises a third frame and a fourth frame respectively arranged on two parallel sides of the second sub-door panel;

[0024] A connecting member is provided at each end of the first frame, the connecting member is provided at the end of the first frame and has a connecting end extending outward from the plane where the first sub-door panel is located, the connecting ends of the connecting members at both ends of the first frame are located on the first side of the first sub-door panel, and the connecting ends of the connecting members at both ends of the second frame are located on the second side of the first sub-door panel;

[0025] A connecting member is provided at each end of the third frame, the connecting member is provided at the end of the third frame and has a connecting end extending outward from the plane where the second sub-door panel is located, the connecting ends of the connecting members at both ends of the third frame are located on the first side of the second sub-door panel, and the connecting ends of the connecting members at both ends of the fourth frame are located on the second side of the second sub-door panel;

[0026] Inside the door panel unit: a connecting piece on the second side frame of the first sub-door panel is hingedly connected to a connecting piece on the third side frame of the second sub-door panel, so that the door panel unit can be folded from an unfolded state to a folded state along a rotating axis in a first direction;

[0027] Between adjacent door panel units: the connecting piece on the first frame of the first sub-door panel is hinged to the connecting piece on the fourth frame of the second sub-door panel, allowing the door panel unit to be folded from the unfolded state along the rotating axis in the first direction to the folded state.

[0028] The first and second side frames may be integrally formed with the main door panel of the first sub-door panel, or riveted or welded, or detachably connected via fasteners. The third and fourth side frames may also be integrally formed with the main door panel of the second sub-door panel, or riveted or welded, or detachably connected via fasteners.

[0029] The connecting piece may be welded or integrally formed with the first frame, the second frame, the third frame and the fourth frame, or may be detachably connected by fasteners.

[0030] Among them, the plane where the first sub-door panel is located refers to the plane where the planar door panel main body of the first sub-door panel is located as the main wind-bearing surface; the plane where the second sub-door panel is located refers to the plane where the planar door panel main body of the second sub-door panel is located as the main wind-bearing surface.

[0031] Among them, the connecting piece on the second frame of the first sub-door panel inside one of the door panel units is hinged to the connecting piece on the third frame of the second sub-door panel, which can be achieved by setting a pivot to pass through the two connecting pieces at the same time, or by setting a hole in one of the two connecting pieces and setting an axis concentric with the hole in the other.

[0032] Among them, the connecting piece on the first frame of the first sub-door panel between adjacent door panel units is hinged to the connecting piece on the fourth frame of the second sub-door panel, which can be achieved by setting a pivot to pass through the two connecting pieces at the same time, or by setting a hole in one of the two connecting pieces and setting an axis concentric with the hole in the other.

[0033] Wherein, by forming a hinge through the connecting member, the hinge axis can be located in the plane where the first sub-door panel and / or the second sub-door panel are located, or can be located outside the plane where the first sub-door panel and the second sub-door panel are located.

[0034] In one embodiment, the door panel unit further comprises:

[0035] The limiting structure is used to limit the angle between the first sub-door panel and the second sub-door panel to be not equal to 180 degrees in the expanded state.

[0036] The expanded state refers to a state where the angle between the first sub-door panel and the second sub-door panel is the largest.

[0037] In one embodiment, the limiting structure is provided on the first sub-door panel and has a first limiting surface and a second limiting surface;

[0038] In the expanded state, within the same door panel unit: the first limiting surface forms a surface contact with the connecting piece on the third frame of the second sub-door panel, and the angle between the contact surface between the two and the plane where the first sub-door panel is located is not equal to 90 degrees; between two adjacent door panel units: the second limiting surface forms a surface contact with the connecting piece on the fourth frame of the second sub-door panel of the adjacent door panel unit, and the angle between the contact surface between the two and the plane where the first sub-door panel is located is not equal to 90 degrees.

[0039] The first and second limiting surfaces are plane or curved surfaces, and may be part of the same component or separate components. The limiting structure may be integrally formed, riveted, or welded to the first sub-door panel, or may be detachably connected via fasteners. The detachable connection facilitates replacement of limiting structures of different shapes and sizes, thereby flexibly adjusting the maximum angle between the first and second sub-door panels in the expanded state.

[0040] In a preferred embodiment, the ratio of the lengths of the first sub-door panel to the second sub-door panel is (1.4-1.6):1.

[0041] In one embodiment, the retractable door system further comprises:

[0042] The steel wheel frame includes a first end and a second end. The first end of the steel wheel frame is connected to the first frame of the first sub-door panel through a cable. The second end of the steel wheel frame is provided with a steel wheel. By adjusting the tension of the cable, the mutual force between the steel wheel and the left frame or the right frame of the door frame is maintained.

[0043] The steel wheel can be one and located in the middle of the left or right door frame; or two and located symmetrically with respect to the middle plane of the left or right door frame. In short, the steel wheel frame is ensured not to deflect in the horizontal plane and in the plane where the door panel is located.

[0044] In one embodiment, the retractable door system further comprises:

[0045] A pipe fitting passes through the connecting piece set on the first frame of the first sub-door panel and the connecting piece on the fourth frame of the second sub-door panel as a hinge axis between the two, and the cable connected to the first frame of the first sub-door panel passes through the pipe fitting.

[0046] In one embodiment, the power plant comprises:

[0047] An electric hoist is provided at each of the left and right ends of the upper frame of the door frame. The motor of the electric hoist is mounted on the upper frame of the door frame. The steel wire rope of the electric hoist passes through the steel wheel frame below it and is fixed to the lowest steel wheel frame.

[0048] The control system controls the electric hoist to reel in the wire rope, and the door panel begins to fold;

[0049] The control system controls the electric hoist to unwind the wire rope, and the door panel begins to unfold.

[0050] The door panel starts to fold when the door panel unit farthest from the electric hoist starts to fold, and then the adjacent door panel units fold in sequence.

[0051] The door panels start to unfold when the door panel unit closest to the electric hoist begins to unfold, and then the adjacent door panel units unfold in sequence.

[0052] The door panel in the retractable door system provided in the present application comprises a plurality of door panel units, wherein the door panel units can be folded from an unfolded state to a folded state along a rotating axis in a first direction, the projected area of the door panel units in the unfolded state in the plane where the first direction is located is larger than the projected area of the door panel units in the folded state in the plane where the first direction is located, and the plurality of door panel units extend in a first direction and a second direction and are connected to form the door panel, the second direction being perpendicular to the first direction; when the door panel units are in the unfolded state, the door panels are released to form an enclosure with the windproof curtain wall, and when in the folded state, the door panels are folded to open the vehicle passage. The retractable door system further comprises a door frame, wherein the door panel units located in the uppermost row of the door panels are hoisted on the upper frame of the door frame, and the upper and / or lower edges of the door panel units located on the leftmost and rightmost sides of the door panels are connected to the left and right frames of the door frame respectively through cables; a power device drives the door panel to switch between the unfolded state and the folded state; and a control system is connected to the power device to control the operation of the power device. There are gaps inside the door panel unit and between adjacent door panel units to guide the amount of wind borne by the door panel, reduce the wind speed entering the door panel, and reduce the impact of strong winds on the door panel; the flat-plate form of the door panel can withstand wind impacts in different directions; the door panel unit is not restricted in expansion in the first direction and the second direction, so it can meet the needs of large-sized door openings.

[0053] The retractable door system we provide is suitable for use in the windbreak wall openings of bulk cargo yards or construction sites, further reducing wind speed and dust in the yard, preventing dust from overflowing through the openings in the yard or construction site, and optimizing vehicle access management by opening and closing the door to meet vehicle traffic needs. BRIEF DESCRIPTION OF THE DRAWINGS

[0054] Those skilled in the art will appreciate that the accompanying drawings are provided for a better understanding of the present invention and do not constitute any limitation on the scope of the present invention.

[0055] Figure 1 A schematic diagram of a door panel unit in a retractable door system provided in Embodiment 1 of the present invention;

[0056] Figure 2 A schematic diagram of the retractable door system according to the first embodiment of the present invention after all door panel units are fully unfolded;

[0057] Figure 3 A schematic diagram of the retractable door system provided in the first embodiment of the present invention after all door panel units are folded;

[0058] Figure 4 An exploded schematic diagram of the components within a door panel unit and at the connection between adjacent door panel units in the retractable door system provided in the first embodiment of the present invention;

[0059] Figure 5A schematic diagram of the assembled parts within a door panel unit and at the connection between adjacent door panel units in the retractable door system provided in the first embodiment of the present invention;

[0060] Figure 6 A schematic diagram of a steel wheel frame and a portion of a door frame in a retractable door system provided in Example 1 of the present invention;

[0061] Figure 7 A schematic diagram of a portion of a door frame in the retractable door system provided in Example 1 of the present invention;

[0062] Figure 8 A schematic diagram of a door panel unit in a retractable door system provided in a second embodiment of the present invention;

[0063] Figure 9 A schematic diagram of a portion of the structure of a door panel unit in a retractable door system provided in the second embodiment of the present invention;

[0064] Figure 10 This is an exploded schematic diagram of the parts within the door panel unit and the connection between adjacent door panel units in the retractable door system provided in the second embodiment of the present invention. DETAILED DESCRIPTION

[0065] In order to make the purpose, advantages and features of the present invention clearer, the present invention is further described in detail below in conjunction with the accompanying drawings and specific embodiments. It should be noted that the drawings are in a very simplified form and use non-precise proportions, which are only used to conveniently and clearly assist in explaining the purpose of the embodiments of the present invention. In order to make the purpose, features and advantages of the present invention more obvious and easy to understand, please refer to the accompanying drawings. It should be noted that the structures, proportions, sizes, etc. illustrated in the drawings of this specification are only used to match the contents disclosed in the specification for people familiar with this technology to understand and read, and are not used to limit the conditions for the implementation of the present invention. Any modification of the structure, change in the proportional relationship or adjustment of the size, under the condition that the effect produced by the present invention and the purpose that can be achieved are the same or similar, should still fall within the scope of the technical content disclosed by the present invention.

[0066] As used herein, the singular forms "a," "an," and "the" include plural referents unless the context clearly indicates otherwise. As used herein, the term "several" is generally used to include "at least one" unless the context clearly indicates otherwise.

[0067] In the description of the present invention, unless otherwise expressly specified or limited, the terms "mounted," "connected," "connected," and "fixed" should be understood in a broad sense. For example, they may refer to fixed connections, detachable connections, or integration; mechanical connections or communication connections; direct connections or indirect connections through an intermediate medium; and they may refer to internal communication between two components or interaction between two components. Those skilled in the art will understand the specific meanings of the above terms in the present invention based on specific circumstances.

[0068] Example 1

[0069] The retractable door system provided in this embodiment can be used at openings in windbreak walls around bulk cargo yards or construction sites, further reducing wind speed and dust in the yard, preventing dust from escaping through the door opening, thus meeting environmental protection requirements. Furthermore, the opening and closing of the windbreak door allows for vehicle access, optimizing vehicle access management.

[0070] Reference Figures 1 to 7 The retractable door system comprises:

[0071] The door panel comprises a plurality of door panel units 1, which can be opened from the unfolded state (refer to Figure 2 ) along the first direction ( Figure 2 The axis of rotation is folded from the horizontal direction of the left and right (refer to Figure 3 ), the door panel unit 1 in the unfolded state is in the plane where the first direction is located ( Figure 2 The projection area in the first direction is larger than the projection area in the plane of the door panel unit in the folded state. The plurality of door panel units 1 are arranged in the first direction and the second direction ( Figure 2 The second direction is perpendicular to the first direction;

[0072] Door frame, the door panel unit 1 located in the uppermost row of the door panels is hoisted on the upper frame 21 of the door frame, and the upper and / or lower edges of the door panel units 1 located on the leftmost and rightmost sides of the door panels are connected to the left frame 23 and the right frame 22 of the door frame respectively through cables 5;

[0073] a power device (not shown in the figure) for driving the door panel to switch between an unfolded state and a folded state;

[0074] A control system (not shown in the figure) is connected to the power device to control the operation of the power device.

[0075] The number of door panel units in the first and second directions is set according to the size of the opening. Therefore, the retractable door system provided by this application is flexible in size adjustment. At the same time, this embodiment recommends that a door panel include multiple door panel units 1. A preferred embodiment is to provide a structure with multiple door panel units 1, leaving gaps between the door panel units 1 to allow wind to pass through, reducing wind speed and reducing the impact on the door panel, thus using softness to overcome softness. It has been verified that the door panel and door frame provided by this embodiment can withstand a force 10 wind.

[0076] The size of the door frame is suitable for being set to a size larger than the door opening, so that the door panel can completely cover the hollow part of the windbreak wall, thereby better playing the role of slowing down the wind speed.

[0077] In this embodiment, the door panel unit 1 is provided with an array of ventilation holes 15. Under the inventive concept of the present application, the ventilation holes 15 allow wind to pass through, thereby reducing the wind speed and ensuring that the pressure carried by the door panel unit 1 is reduced, so that the door panel unit 1 can withstand larger and stronger winds.

[0078] A preferred implementation of this embodiment is that the projected area of the door panel unit 1 in the unfolded state within the plane where the first direction is located is less than twice the projected area of the door panel unit 1 in the folded state within the plane where the first direction is located.

[0079] This embodiment provides a specific implementation of a door panel unit 1. In this implementation, the door panel unit 1 includes:

[0080] The first sub-door panel 11 includes a first frame 13 and a second frame 14 respectively provided on two parallel sides of the first sub-door panel 11;

[0081] The second sub-door panel 12 includes a third frame 17 and a fourth frame 18 respectively provided on two parallel sides of the second sub-door panel 12;

[0082] A connecting member 16 is provided at each end of the first frame 13. The connecting member 16 is provided at both ends of the first frame 13 and has a connecting end extending outward from the plane where the first sub-door panel 11 is located ( Figure 1 The connecting ends of the connecting members 16 at both ends of the first frame 13 are located on the first side of the first sub-door plate 11 ( Figure 1 The middle side is the side facing outside the paper).

[0083] The second frame 14 is also provided with a connecting member 16 at each end thereof. The connecting member 16 is provided at both ends of the second frame 14 and has a connecting end extending outward from the plane where the first sub-door panel 11 is located ( Figure 1 The connecting ends of the connecting members 16 at both ends of the second frame 14 are located on the second side of the first sub-door plate 11 ( Figure 1 The middle side is the side facing inwards on the paper).

[0084] A connecting member 16 is provided at each end of the third frame 17. The connecting member 16 is provided at both ends of the third frame 17 and has a connecting end extending outward from the plane where the second sub-door panel 12 is located ( Figure 1 The connecting ends of the connecting members 16 at both ends of the third frame 17 are located on the first side of the second sub-door plate 12 ( Figure 1 The middle is the side facing inwards of the paper),

[0085] A connecting member 16 is provided at each end of the fourth frame 18. The connecting member 16 is provided at both ends of the fourth frame 18 and has a connecting end extending outward from the plane where the second sub-door panel 12 is located ( Figure 1 The connecting ends of the connecting members 16 at both ends of the fourth frame 18 are located on the second side of the second sub-door plate 12 ( Figure 1 The middle is the side facing outward from the paper);

[0086] Inside the door panel unit 1: the connecting member 16 on the second side frame 14 of the first sub-door panel 11 is hinged to the connecting member 16 on the third side frame 17 of the second sub-door panel 12, so that the door panel unit 1 can be folded from the unfolded state to the folded state along the rotation axis in the first direction;

[0087] Between adjacent door panel units 1: the connecting piece on the first frame 13 of the first sub-door panel 11 is hinged to the connecting piece 16 on the fourth frame 18 of the second sub-door panel 12, allowing the door panel unit 1 to be folded from the unfolded state along the rotating axis in the first direction to the folded state.

[0088] In the retractable door system provided in this embodiment, a pin 62 is provided, which passes through a connecting piece 16 provided on the second side frame 14 of the first sub-door panel 11 and a connecting piece 16 on the third side frame 17 of the second sub-door panel 12 as a hinge axis therebetween. Furthermore, a pipe 61 is provided, which passes through a connecting piece 16 provided on the first side frame 13 of the first sub-door panel 11 and a connecting piece 16 on the fourth side frame 18 of the second sub-door panel 12 as a hinge axis therebetween, and a cable 5 connected to the first side frame 13 of the first sub-door panel 11 passes through the pipe.

[0089] exist Figure 3 In the embodiment, all door panel units 1 are in a folded state. Due to gravity, the effects of other door panel units and the external force provided by the power device, the door panel units 1 are in an inclined state. In case of rainy weather, no rainwater will remain in the inclined door panel units 1, and the load is small, which reduces the stiffness requirements for the cables 5 and the door frame.

[0090] exist Figure 4 The connecting member 16 shown in the figure is also arranged on the outermost side (the leftmost side in the figure), and the sandwich structure makes the hinge more stable.

[0091] In this embodiment, refer to Figure 1 、 Figure 4 and Figure 5 , the door panel unit 1 also includes:

[0092] The limiting structure 7 is used to limit the angle between the first sub-door panel 11 and the second sub-door panel 12 to not be equal to 180 degrees in the unfolded state, thereby avoiding the dead point and ensuring that the door panel unit 1 changes smoothly from the unfolded state to the folded state.

[0093] This embodiment provides a specific implementation of the limiting structure 7: the limiting structure 7 is provided on the first sub-door panel 11 and has a first limiting surface 71 and a second limiting surface 72;

[0094] When in the expanded state, within the same door panel unit 1: the first limiting surface 71 forms a surface contact with the connecting piece 16 on the third frame 17 of the second sub-door panel 12, and the angle between the contact surface between the two and the plane where the first sub-door panel 11 is located is not equal to 90 degrees; between two adjacent door panel units 1: the second limiting surface 72 forms a surface contact with the connecting piece 16 on the fourth frame 18 of the second sub-door panel 12 of the adjacent door panel unit 1, and the angle between the contact surface between the two and the plane where the first sub-door panel 11 is located is not equal to 90 degrees.

[0095] In this embodiment, the first limiting surface 71 and the second limiting surface 72 are both located on the same limiting structure 7 and at two ends of the limiting structure 7 .

[0096] The above-mentioned limiting structure 7 also has the function of preventing back-folding, ensuring that the folding directions of all door panel units 1 are consistent when folding.

[0097] exist Figure 4 The embodiment in which the connecting member 16 shown in the figure is also arranged on the outermost side (the leftmost side in the figure) is also beneficial for protecting the contact surface from being disturbed by foreign objects, thereby ensuring that the shapes of the door panel units are consistent in the expanded state.

[0098] Preferably, the length ratio of the first sub-door panel 11 to the second sub-door panel 12 is (1.4-1.6):1. The length of the second sub-door panel 12 is smaller than that of the first sub-door panel 11. When folded, the upper ends of the door panel units 1 are in the same vertical plane, which reduces the load on the door frame and cables.

[0099] The retractable door system provided in this embodiment further includes:

[0100] Steel wheel frame 41, see Figure 3 and 6 , including the first end ( Figure 6 the right end of the middle) and the second end ( Figure 6The first end of the steel wheel frame 41 is connected to the first side frame 13 of the first sub-door panel 11 via a cable 5. The second end of the steel wheel frame 41 is provided with two steel wheels 42. The two steel wheels 42 are symmetrical with respect to the center line of the I-beam 24 provided on the left side frame 23 or the right side frame 22 of the door frame. By adjusting the tension of the cable 5, the mutual force between the steel wheels 42 and the I-beam 24 provided on the left side frame 23 or the right side frame 22 of the door frame is maintained. Therefore, the cable 5 is kept in a taut state. This ensures that each row of door panel units 1 connected to the cable 5 is flush.

[0101] Each steel wheel frame 41 has a vertical through-hole at the same position. The steel wire rope of the electric hoist 3 passes through this vertical through-hole, allowing a single electric hoist 3 to drive the multiple steel wheel frames 41 connected in series below it to rise or fall. To reduce the impact strength and friction between the steel wire rope and the through-holes in the steel wheel frames 41, a polyurethane sleeve is installed in the through-hole.

[0102] In a preferred embodiment, a buffer block is provided on the lower surface of the steel wheel frame 41 to buffer the collision between the upper and lower adjacent pulleys during the unfolding or folding process.

[0103] The steel wheel frame 41 on one side of the door panel is directly connected to the cable 5, and the steel wheel frame 41 on the other side of the door panel can be connected to the cable 5 through a basket bolt, and the tension of the cable 5 can be adjusted by the basket bolt.

[0104] In this embodiment, the left side frame 23 or the right side frame 22 is preferably fixedly connected to the windbreak wall on the door opening side. The connection structure between the two can be Figure 7 In the structure shown, the connecting I-beam 43 on the left side frame 23 or the right side frame 22 is connected to the windbreak wall via a special-shaped connector 92, a first connecting rod 91, and a second connecting rod 93. The first connecting rod 91 and the second connecting rod 93 are respectively connected to two columns on the existing door opening. The special-shaped connector 92 and the connecting I-beam 43 have at least two contact surfaces, and there is an angle between the two contact surfaces. The connection between the first connecting rod 91 and the second connecting rod 93 and the special-shaped connector 92 and the windbreak wall adopts a method that allows a certain degree of error and is adjustable, for example Figure 7 The long hole in the door frame is matched with the bolt. The special-shaped connecting piece 92, the first connecting rod 91 and the second connecting rod 93 form a triangle, so that the connection between the door frame and the windproof door is stable and reliable.

[0105] In this embodiment, the power device includes:

[0106] An electric hoist 3 is provided at each of the left and right ends of the upper frame 21 of the door frame. The motor of the electric hoist 3 is mounted on the upper frame 21 of the door frame. The steel wire rope of the electric hoist 3 passes through a plurality of series-connected steel wheel frames 41 located below the electric hoist 3 and is fixed to the lowest steel wheel frame 41.

[0107] When the windproof door needs to be opened, an opening signal is sent to the control system on site or through remote communication. The control system controls the motor of the electric hoist 3 to rotate forward, reel in the wire rope, and fold the second sub-door panel 12 toward the first sub-door panel 11 starting from the bottom door panel unit 1. After folding to the position where the two are most fitted, the upper door panel unit 1 adjacent to it begins to fold, and the process is repeated in sequence until it is folded to the top or the motor of the electric hoist 3 stops working after receiving the control signal.

[0108] When the windproof door needs to be closed, a closing signal is sent to the control system on site or through remote communication. The control system controls the motor of the electric hoist 3 to reverse its operation, unwind the wire rope, and move the bottom door panel unit 1 downward. The door panel units 1 are gradually unfolded together until they reach the bottom or the motor of the electric hoist 3 stops working after receiving the control signal.

[0109] Considering that the operating environment is open air with serious dust, and there is also salt spray in the dock usage scenario, a protective cover is set to protect the electric hoist.

[0110] There may be multiple openings on the windbreak wall. The retractable door systems at the multiple openings can be opened and closed by their own independent motors. The opening and closing of each door panel can be operated in two working modes: "local" and "remote". Among them, "remote operation" is to conduct remote wireless communication with the rear cloud monitoring service through the 4G wireless communication module installed in the front retractable door system, and support remote wireless control of the independent opening and closing of the front retractable door system by the upper computer configuration software and APP customized development interface.

[0111] "Local" control can achieve the following functions:

[0112] 1) Local button opening function;

[0113] 2) The opening and closing process has sound and light alarm function;

[0114] 3) Automatically stop operation when the door is opened and closed;

[0115] 4) The function can be manually opened in case of failure;

[0116] "Remote" control uses 4G wireless communication to achieve the following functions:

[0117] 1) Remote start function;

[0118] 2) Remote monitoring at any time and anywhere;

[0119] 3) Monitor and control motor operation functions;

[0120] 4) Record historical alarms and historical data functions

[0121] 5) Automatic protection function:

[0122] When the wind pressure borne by the door panel is greater than the maximum working wind pressure, the door panel of the windproof door system will automatically open to prevent the windproof door system from being damaged by typhoons.

[0123] The technical solution provided by this embodiment abandons the design concept of "using rigidity to overcome flexibility" and adopts the design concept of "using flexibility to overcome flexibility". It adopts door panel units connected in series up and down, and the door panel units use windproof mesh panels made of similar materials to windbreak walls. The horizontal cables pass through multiple door panel units, and the tension of the horizontal steel wire ropes and the tension of the longitudinal steel wire ropes are used to overcome the wind load. When the windproof door is opened, the door panel unit can be retracted to an inclined posture after reasonable design. At the same time, the limit structure set to prevent back-bending can ensure that the connecting rod group folds in the designed direction. This structure can adapt to large-sized doors and level 10 winds.

[0124] In this embodiment, the door panel unit can be made of glass fiber reinforced plastic, plastic, stainless steel, aluminum alloy and other materials with different colors and patterns;

[0125] In this embodiment, the electric hoist is an electric wire rope hoist, but a chain electric hoist can also be used. However, the pulley structure will become larger and the lifting speed will be slower if a chain electric hoist is used.

[0126] In this embodiment, the electric hoist is mounted on the top. Alternatively, a bottom-mounted electric hoist with a top-mounted fixed pulley can be used. While a top-mounted electric hoist is simpler in structure, it's inconvenient to maintain at height. A bottom-mounted electric hoist with a top-mounted fixed pulley is more complex and easier to maintain on the ground. The specific implementation method should be selected based on the specific needs of the user.

[0127] In this embodiment, the electric hoists on both sides are controlled synchronously to pull the steel wheel frames on both sides at the same time. Alternatively, a winch device can be arranged in the middle to achieve the purpose of controlling the rise or fall of the steel wheel frames on both sides by one motor, thereby ensuring synchronization of the two sides, but the overall structure will be complicated.

[0128] Example 2

[0129] Compared with Example 1, the retractable door system provided in this embodiment has the following features: Figure 8 and Figure 9The limiting structures 7 are set as two and are arranged at intervals, one is close to the first frame 13 of the first sub-door panel 11, and the other is close to the second frame 14 of the first sub-door panel 11, and the first limiting surface 71 and the second limiting surface 72 are respectively set on the two limiting structures 7.

[0130] When in the expanded state, within the same door panel unit 1: the first limiting surface 71 forms a surface contact with the connecting piece 16 on the third frame 17 of the second sub-door panel 12, and the angle between the contact surface between the two and the plane where the first sub-door panel 11 is located is not equal to 90 degrees; between two adjacent door panel units 1: the second limiting surface 72 forms a surface contact with the connecting piece 16 on the fourth frame 18 of the second sub-door panel 12 of the adjacent door panel unit 1, and the angle between the contact surface between the two and the plane where the first sub-door panel 11 is located is not equal to 90 degrees.

[0131] In the unfolded state, it is used to limit the angle between the first sub-door panel 11 and the second sub-door panel 12 to be not equal to 180 degrees, thereby avoiding the dead point and ensuring that the door panel unit 1 changes smoothly from the unfolded state to the folded state.

[0132] The above-mentioned limiting structure 7 also has the function of preventing back-folding, ensuring that the folding directions of all door panel units 1 are consistent when folding.

[0133] The connecting member 16 in embodiment 1 is also arranged on the outermost side ( Figure 4 The sandwich structure makes the hinge more stable. Figure 10 As shown, a gasket 161 is provided on the outside (the far left in the figure).

[0134] The above description is merely a description of preferred embodiments of the present invention and does not limit the scope of the present invention. Any changes or modifications made by persons skilled in the art based on the above disclosure are within the scope of protection of the present invention. Obviously, various modifications and variations may be made by persons skilled in the art without departing from the spirit and scope of the present invention. Thus, if such modifications and variations fall within the scope of the present invention and its equivalents, the present invention is intended to include such modifications and variations.

Claims

1. A retractable door system for openings on windbreak walls at bulk cargo yards or construction sites, characterized in that: Include: A door panel comprises a plurality of door panel units, wherein the door panel units can be folded from an unfolded state to a folded state along a rotation axis in a first direction, wherein a projected area of the door panel units in the unfolded state within a plane in which the first direction lies is larger than a projected area of the door panel units in the folded state within the plane in which the first direction lies, wherein a plurality of the door panel units extend in a first direction and a second direction and are connected to form the door panel, wherein the second direction is perpendicular to the first direction; and gaps are left between the door panel units to allow wind to pass through, thereby reducing wind speed and reducing impact on the door panel. The door panel unit located on the uppermost row of the door panels is hoisted on the upper frame of the door frame, and both ends of the upper edge and / or lower edge of the door panel unit located on the leftmost and rightmost sides of the door panel are respectively connected to the left frame and the right frame of the door frame through cables; a power device for driving the door panel to switch between an unfolded state and a folded state; A control system, connected to the power device, to control the operation of the power device; The door panel unit comprises: A first sub-door panel, comprising a first frame and a second frame respectively arranged on two parallel sides of the first sub-door panel; The second sub-door panel comprises a third frame and a fourth frame respectively arranged on two parallel sides of the second sub-door panel; A connecting member is provided at each end of the first frame, the connecting member is provided at the end of the first frame and has a connecting end extending outward from the plane where the first sub-door panel is located, the connecting ends of the connecting members at both ends of the first frame are located on the first side of the first sub-door panel, and the connecting ends of the connecting members at both ends of the second frame are located on the second side of the first sub-door panel; A connecting member is provided at each end of the third frame, the connecting member is provided at the end of the third frame and has a connecting end extending outward from the plane where the second sub-door panel is located, the connecting ends of the connecting members at both ends of the third frame are located on the first side of the second sub-door panel, and the connecting ends of the connecting members at both ends of the fourth frame are located on the second side of the second sub-door panel; The door panel unit further comprises: The limiting structure is used to limit the angle between the first sub-door panel and the second sub-door panel to be not equal to 180 degrees in the expanded state.

2. The retractable door system according to claim 1, characterized in that: The door panel unit is provided with an array of ventilation holes.

3. The retractable door system according to claim 1, characterized in that: The projected area of the door panel unit in the expanded state within the plane where the first direction is located is less than twice the projected area of the door panel unit in the folded state within the plane where the first direction is located.

4. The retractable door system according to claim 3, characterized in that: Inside the door panel unit: a connecting piece on the second side frame of the first sub-door panel is hingedly connected to a connecting piece on the third side frame of the second sub-door panel, so that the door panel unit can be folded from an unfolded state to a folded state along a rotating axis in a first direction; Between adjacent door panel units: the connecting piece on the first frame of the first sub-door panel is hinged to the connecting piece on the fourth frame of the second sub-door panel, allowing the door panel unit to be folded from the unfolded state along the rotating axis in the first direction to the folded state.

5. The retractable door system according to claim 4, characterized in that: The limiting structure is arranged on the first sub-door panel and has a first limiting surface and a second limiting surface; In the expanded state, within the same door panel unit: the first limiting surface forms a surface contact with the connecting piece on the third frame of the second sub-door panel, and the angle between the contact surface between the two and the plane where the first sub-door panel is located is not equal to 90 degrees; between two adjacent door panel units: the second limiting surface forms a surface contact with the connecting piece on the fourth frame of the second sub-door panel of the adjacent door panel unit, and the angle between the contact surface between the two and the plane where the first sub-door panel is located is not equal to 90 degrees.

6. The retractable door system according to claim 4, characterized in that: The ratio of the lengths of the first sub-door panel to the second sub-door panel is (1.4-1.6):

1.

7. The retractable door system according to claim 4, characterized in that: Also includes: The steel wheel frame includes a first end and a second end. The first end of the steel wheel frame is connected to the first frame of the first sub-door panel through a cable. The second end of the steel wheel frame is provided with a steel wheel. By adjusting the tension of the cable, the mutual force between the steel wheel and the left frame or the right frame of the door frame is maintained.

8. The retractable door system according to claim 7, characterized in that: Also includes: A pipe fitting passes through the connecting piece set on the first frame of the first sub-door panel and the connecting piece on the fourth frame of the second sub-door panel as a hinge axis between the two, and the cable connected to the first frame of the first sub-door panel passes through the pipe fitting.

9. The retractable door system according to claim 7, characterized in that: The power unit comprises: An electric hoist is provided at each of the left and right ends of the upper frame of the door frame. The motor of the electric hoist is mounted on the upper frame of the door frame. The steel wire rope of the electric hoist passes through the steel wheel frame below it and is fixed to the lowest steel wheel frame. The control system controls the electric hoist to reel in the wire rope, and the door panel begins to fold; The control system controls the electric hoist to unwind the wire rope, and the door panel begins to unfold.

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