Marine upturning weather tight door

Abstract

The invention provides a marine upturning type weather tight door. The marine upturning type weather tight door comprises a door frame, a door plate assembly, a side hinge assembly, a lower door plate driving device and a cabin door driving device. The door plate assembly comprises a left side door plate assembly and a right side door plate assembly, the left side door plate assembly comprises a left upper door plate and a left lower door plate which are connected through a first connecting hinge, and the right side door plate assembly comprises a right upper door plate and a right lower door plate which are connected through a second connecting hinge; the side hinge assembly comprises a left side hinge and a right side hinge which are correspondingly arranged on the two sides of the door plate assembly respectively, one end of the left side hinge and one end of the right side hinge are fixed to the side edges of the upper left door plate and the upper right door plate respectively, and the other ends of the left side hinge and the right side hinge are rotatably fixed to the corresponding positions of the door frame. And the lower door plate driving device is arranged between the upper door plate and the lower door plate.

Description

Technical Field

[0001] This invention relates to the field of shipbuilding technology, and in particular to a shipboard top-loading weatherproof door. Background Technology

[0002] Ship bulkhead doors, especially those located on open decks or watertight compartments, are critical components for ensuring the safety, watertightness, and integrity of the ship's interior environment. These doors not only need to meet conventional passage and isolation functions, but also require excellent weatherproofing to withstand the impact of waves and rainwater in harsh sea conditions. Additionally, some bulkhead doors must meet corresponding fire resistance requirements.

[0003] Currently, the most common design for top-hinged or side-hinged bulkhead doors widely used on ships is a single or multi-panel integral door structure. The door panel is typically connected to the door frame via hinges on the top or side, and is driven by hydraulic, pneumatic, or electric actuators to rotate and open or close. A rubber sealing strip is usually installed at the contact point between the door panel and the door frame. When the door panel is closed and pressed down by the locking mechanism, the sealing strip undergoes elastic deformation, thus achieving a seal.

[0004] However, in practical applications, especially in scenarios where sealing performance and ease of opening and closing are extremely important, the aforementioned existing technologies have gradually revealed the following major technical shortcomings:

[0005] During the opening and closing of the door, there is usually relative sliding friction between the bottom edge of the door panel and the door frame threshold. This friction, especially when the door is heavy or has slight misalignment, will continuously and repeatedly scrape the sealing strip located at the bottom. After long-term use, this can easily lead to wear, tearing, or even detachment of the sealing strip, seriously damaging the overall sealing performance of the bulkhead door, causing safety hazards such as water leakage and air leakage, and the cost of repair and replacement is high.

[0006] Because the bottom sealing strip of the door is pressed tightly when closed, it requires overcoming a large static friction force to separate it during the initial opening phase. This results in a higher peak load on the drive mechanism (such as the hydraulic cylinder), which not only increases system energy consumption but also places higher demands on the strength of drive components and structural parts, leading to bulkier equipment and increased costs.

[0007] Existing designs treat the opening and closing of the door as a single, integrated action, failing to decouple and sequentially control the actions of seal release and door rotation. This makes addressing bottom wear issues difficult, often requiring the use of more wear-resistant sealing materials or more complex compensation mechanisms to alleviate the problem, but failing to fundamentally eliminate friction.

[0008] Therefore, there is an urgent need in this field for a new type of marine top-hinged weatherproof door that can fundamentally solve the problem of wear on the bottom sealing surface of the door panel during the opening and closing process and reduce the opening and closing resistance. Summary of the Invention

[0009] A key advantage of this invention is that it provides a marine flip-up weatherproof door, addressing the problem of easy wear and failure caused by sliding friction between the bottom sealing strip and the threshold. This invention, through its unique split door panel structure and orderly opening and closing procedure, allows the lower door panel to independently flip upwards by at least 90°, achieving vertical, frictionless separation and repositioning of the bottom sealing surface. This completely eliminates the root cause of seal damage, greatly extends the service life of the core sealing components, and ensures the door's durable weatherproof / waterproof performance throughout its entire lifespan.

[0010] A key advantage of this invention is that it provides a marine-use top-hinged weatherproof door that completely overcomes the maximum static frictional resistance when driving the main door body to rotate. This significantly reduces the peak load of the main drive unit, allowing for the use of smaller, more economical drive units. Furthermore, the entire opening and closing process is smoother and more stable, optimizing system energy consumption, making it particularly suitable for applications requiring frequent opening and closing or driven by limited energy sources.

[0011] A key advantage of this invention is that it provides a shipboard top-hinged weatherproof door. The modular four-panel design, robust side hinge system, and optional linkage locking device provided by this invention not only enhance the structural rigidity and load-bearing capacity of the door to withstand the impact of wind and waves and meet the requirements of fireproof bulkhead doors, but also its flexible control methods (manual, hydraulic, and electric) enable it to be better integrated with modern ship automation systems and adaptable to various ship bulkhead doors with stringent requirements for sealing, safety, and ease of operation.

[0012] According to one aspect of the present invention, a marine top-hinged weatherproof door, capable of achieving the aforementioned and other objectives and advantages, includes a door frame, a door panel assembly, a side hinge assembly, a lower door panel drive device, and a hatch drive device; the door panel assembly includes a left door panel assembly and a right door panel assembly, the left door panel assembly including an upper left door panel and a lower left door panel connected by a first connecting hinge, and the right door panel assembly including an upper right door panel and a lower right door panel connected by a second connecting hinge; the side hinge assembly includes a left side hinge and a right side hinge respectively disposed on both sides of the door panel assembly. The side hinges are respectively fixed at one end to the side of the upper left door panel and the upper right door panel, and the other end is rotatably fixed to the corresponding position of the door frame; the lower door panel drive device is disposed between the upper door panel and the lower door panel, and is used to drive the lower left door panel and the lower right door panel to independently flip upward relative to the corresponding upper door panel; one end of the door drive device is hinged to the door frame, and the other end is hinged to the door panel assembly, and is used to drive the door panel assembly to rotate as a whole around the axis of the side hinge assembly, so as to switch between the open position and the closed position.

[0013] According to one embodiment of this application, the lower door panel driving device is a linear drive mechanism, selected from any one of a hydraulic cylinder, a pneumatic cylinder, or an electric push rod, with its cylinder body end hinged to the back of the upper door panel and its piston rod end hinged to the back of the corresponding lower door panel.

[0014] According to one embodiment of this application, the lower door panel driving device is configured to drive the lower door panel from a closed position coplanar with the upper door panel to an open position at an angle of at least 90° with the upper door panel, so that the sealing structure at the bottom of the lower door panel disengages from the door frame.

[0015] According to one embodiment of this application, the door drive device is an operating cylinder or an electric linear actuator, which is disposed on the top or side of the door frame.

[0016] According to one embodiment of this application, a sealing device is further provided on the contact surface between the door frame and the door panel assembly. The sealing device includes an elastic sealing strip arranged around the door panel assembly to achieve weather sealing between the door frame and the door panel assembly when the door panel assembly is in the closed position.

[0017] According to one embodiment of this application, a locking device is also provided on the back of the door panel assembly. The locking device includes a retractable latch or locking rod, and a lock hole or lock seat provided on the door frame, for mechanically locking the door panel assembly in the closed position to the door frame.

[0018] According to one embodiment of this application, a linkage locking device is also included, which is disposed across the back of the upper left door panel and the upper right door panel, and / or between the back of the lower left door panel and the lower right door panel, for locking the left and right door panel assemblies together when the door panel assembly is closed.

[0019] According to one embodiment of this application, it further includes at least one set of detachable locking pin mechanisms, the locking pin mechanism including a pin sleeve disposed on the door frame or door panel and a mating pin therewith, for providing additional mechanical locking when the door panel assembly is in the closed position, the pin need to be manually pulled out before opening the door.

[0020] According to one embodiment of this application, each side hinge in the side hinge assembly is a multi-section linkage hinge or a heavy-duty hinge hinge, and its axis of rotation is parallel to the vertical edge of the door frame.

[0021] According to one embodiment of this application, the lower door panel drive device and the hatch drive device are linked and controlled by a hydraulic system or an electrical control system, so that the door opening action is executed in a preset sequence: first, the locking device and the locking pin mechanism are released, then the lower door panel drive device is activated to flip the lower door panel open, and finally the hatch drive device is activated to flip the entire door panel assembly upward and open.

[0022] The further objects and advantages of the invention will become fully apparent from the following description and accompanying drawings.

[0023] These and other objects, features and advantages of the present invention will become fully apparent from the following detailed description and accompanying drawings. Attached Figure Description

[0024] Figure 1 This is a schematic diagram of the overall structure of a marine top-opening weatherproof door according to a first preferred embodiment of the present invention.

[0025] Figure 2A This is a top view of the upward-opening weatherproof door according to the first preferred embodiment of the present invention when it is closed.

[0026] Figure 2B This is a top view of the upward-opening weatherproof door according to the first preferred embodiment of the present invention when it is in the open position.

[0027] Figure 3A This is a side view of the upward-opening weatherproof door according to the first preferred embodiment of the present invention when it is in the sealed position.

[0028] Figure 3B This is a side view of the upward-opening weatherproof door according to the first preferred embodiment of the present invention when it is in the sealed position.

[0029] Figure 4 This is a side view of the upward-opening weatherproof door according to the first preferred embodiment of the present invention when it is in the open position. Detailed Implementation

[0030] The following description is intended to disclose the present invention and enable those skilled in the art to implement it. The preferred embodiments described below are merely examples, and other obvious variations will occur to those skilled in the art. The basic principles of the invention defined in the following description can be applied to other embodiments, modifications, improvements, equivalents, and other technical solutions that do not depart from the spirit and scope of the invention.

[0031] Those skilled in the art should understand that, in the disclosure of this invention, the terms longitudinal, transverse, up, down, front, back, left, right, vertical, horizontal, top, bottom, inside, outside, etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are only for the convenience of describing this invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, the above terms should not be construed as limiting this invention.

[0032] It is understood that the term "one" should be understood as at least one or more, that is, in one embodiment, the number of an element can be one, while in another embodiment, the number of the element can be multiple. The term "one" should not be understood as a limitation on the number.

[0033] Refer to the accompanying drawings in this application specification. Figures 1 to 4 As shown, a marine top-hinged weatherproof door according to a first preferred embodiment of this application is described below. Specifically, the top-hinged weatherproof door includes a door frame 1, a door panel assembly 2, a side hinge assembly 3, a lower door panel drive device 4, and a hatch drive device 5; the door panel assembly 2 includes a left door panel assembly 21 and a right door panel assembly 22, the left door panel assembly 21 includes a left upper door panel 211 and a left lower door panel 212 connected by a first connecting hinge, and the right door panel assembly 22 includes a right upper door panel 221 and a right lower door panel 222 connected by a second connecting hinge; the side hinge assembly 3 includes a left side hinge 31 and a right side hinge 32 respectively disposed on both sides of the door panel assembly, the left side... One end of hinge 31 and right side hinge 32 are respectively fixed to the side of the upper left door panel 211 and the upper right door panel 212, and the other end is rotatably fixed to the corresponding position of the door frame 1; the lower door panel drive device 4 is disposed between the upper door panel and the lower door panel, and is used to drive the lower left door panel 212 and the lower right door panel 222 to independently flip upward relative to the corresponding upper door panel; one end of the hatch drive device 5 is hinged to the door frame 1, and the other end is hinged to the door panel assembly 2, and is used to drive the door panel assembly 2 to rotate as a whole around the axis of the side hinge assembly, so as to switch between the open position and the closed position.

[0034] Specifically, the door panel assembly 2 adopts a modular design that is symmetrical on the left and right and split on the top and bottom, and includes a left door panel assembly 21 and a right door panel assembly 22. The left door panel assembly 21 is movably connected by a first connecting hinge 213 to the upper left door panel 211 and the lower left door panel 212; the right door panel assembly 22 is movably connected by a second connecting hinge 223 to the upper right door panel 221 and the lower right door panel 222.

[0035] It is worth mentioning that the lower door panel (212, 222) is given independent degrees of freedom of movement, which facilitates the subsequent removal of the bottom seal.

[0036] The side hinge assembly 3 is the rotational pivot of the door panel assembly 2, enabling the overall upward tilting motion. The side hinge assembly 3 includes a left side hinge 31 and a right side hinge 32 respectively disposed on both sides of the door panel assembly 2. One end (e.g., the upper end) of each side hinge is firmly fixed to the side of the upper left door panel 211 or the upper right door panel 221, while the other end is rotatably mounted on the corresponding vertical beam of the door frame 1 via a hinge shaft.

[0037] It is worth mentioning that the design of the side hinge assembly 3 being fixedly connected to the upper door panel ensures that the force flow is directly and reliably transmitted when the door panel assembly is subjected to wind and wave loads. At the same time, it transmits the gravity and motion load of the lower door panel to the door frame through the upper door panel, ensuring the integrity and load-bearing capacity of the structure, and is a key load-bearing structure for achieving wind and rain tightness and fire resistance performance.

[0038] The lower door panel drive device 4 is disposed between the upper door panel and the corresponding lower door panel. Taking the left side as an example, one end (cylinder end) of the device is hinged to the back of the upper left door panel 211, and the other end (piston rod end) is hinged to the back of the lower left door panel 212.

[0039] The lower door panel drive device 4 is used to drive the lower left door panel 212 and the lower right door panel 222 to independently rotate upward relative to their respective upper door panels (211, 221). Before the entire door panel is opened, the two lower door panels can be individually controlled to rotate upward (e.g., ≥90°), so that their bottom edges and the sealing strips installed on them are completely lifted away from the threshold of the door frame 1, thereby completely eliminating any sliding friction on the bottom sealing surface in subsequent actions. This fundamentally solves the problem of sealing strip wear mentioned in the background art and greatly extends the service life of the sealing system.

[0040] One end of the door drive device 5 is hinged to the top or side reinforcement structure of the door frame 1, and the other end is hinged to the back of the door panel assembly 2 (usually the upper door panel).

[0041] The door drive device 5 is used to drive the entire door panel assembly 2 (at this time, the lower door panel is in the open state) to rotate around the axis of the side hinge assembly 3, thereby realizing the switching between the door's wide-open position and the tightly sealed closed position. Since the bottom seal has been disengaged at this time, during the rotation opening and closing process of the door panel assembly, the door drive device 5 only needs to overcome the door's own weight and wind resistance, without having to overcome the huge static friction of the seal. Therefore, the drive load is significantly reduced, the system operates more smoothly and saves energy, and a smaller drive unit can be selected to reduce costs.

[0042] When the door is closed, all door panels are in a coplanar position, and the sealing strip is pressed tightly by the locking device to achieve a weathertight seal. When it is necessary to open the door, firstly, the locking device and locking pin are released; then, the lower door panel drive device 4 operates synchronously or sequentially, independently flipping the lower left door panel 212 and the lower right door panel 222 upwards by ≥90°, so that the bottom seal is completely disengaged; finally, the hatch drive device 5 operates, flipping the door panel assembly 2, which no longer has bottom friction, upwards as a whole to open it. The reverse sequence is then executed to close the door. This opening and closing logic of separating before assembling and disengaging before rotating is the key to improving the reliability, durability, and operational economy of this invention.

[0043] Therefore, it can be understood that the present invention, through the creative combination of the split design of the door panel assembly, the load-bearing layout of the side hinge assembly, the independent sealing and disengagement function of the lower door panel drive device, and the overall rotation function of the hatch drive device, synergistically achieves the technical effects of fundamentally avoiding bottom seal wear, significantly reducing opening and closing resistance and energy consumption, and improving operational reliability, thus providing an innovative and practical marine top-loading weatherproof door solution.

[0044] The lower door panel drive device 4 is a linear drive mechanism, selected from any one of hydraulic cylinder, pneumatic cylinder or electric push rod, with its cylinder body end hinged to the back of the upper door panel and its piston rod end hinged to the back of the corresponding lower door panel.

[0045] In this invention, the lower door panel driving device 4 is specifically implemented as a linear drive mechanism. A preferred embodiment includes any one of a hydraulic cylinder, a pneumatic cylinder, or an electric push rod. As an example, its cylinder body (or the fixed end of the motor) is hinged to the back of the upper door panel (211, 221), while its piston rod (or the telescopic end of the push rod) is hinged to the back of the corresponding lower door panel (212, 222).

[0046] The lower door panel driving device 4 is configured to drive the lower door panel from a closed position coplanar with the upper door panel to an open position at an angle of at least 90° with the upper door panel, so that the sealing structure at the bottom of the lower door panel is disengaged from the door frame.

[0047] In this invention, the lower door panel driving device 4 is precisely configured and adjusted to drive the lower door panel to complete a specific and critical action stroke: that is, to drive the lower door panel from the closed position where it is on the same plane as the upper door panel and jointly presses the sealing strip, to the open position where it forms an angle of at least 90° with the upper door panel.

[0048] When the rotation angle reaches or exceeds 90°, the bottom edge of the lower door panel and the sealing strip installed on it are raised to a sufficient height, completely away from the door frame threshold. This ensures that a constant and safe gap is maintained between the bottom sealing surface and the threshold during subsequent rotation of the entire door panel.

[0049] For hatches that also serve as cargo passageways or require drainage, the lower door panel can be flipped to a vertical position (90°) or greater to provide maximum unobstructed space in the bottom area, facilitating passage or fluid flow.

[0050] The door drive device 5 is an operating hydraulic cylinder or an electric linear actuator, which is located on the top or side of the door frame.

[0051] In this invention, the hatch drive device 5 that drives the entire door assembly 2 to rotate as a whole is preferably an operating hydraulic cylinder or an electric linear actuator. The selection of these devices depends on the size and weight of the door and the configuration of the ship's power source.

[0052] As an example, the drive unit is arranged horizontally or at an angle above the doorway. This layout provides optimal torque arm, typically generating a large opening torque with relatively small thrust. Simultaneously, the cylinder or actuator is positioned high up, making it less susceptible to damage from deck water accumulation and impacts.

[0053] Alternatively, the drive unit can be arranged vertically or at an angle on the side of the doorway. This layout saves more overhead space and is particularly suitable for areas with dense piping or structures above the door. It achieves rotation by directly pushing the side of the door panel, making the force path intuitive.

[0054] The weatherproof door also includes a sealing device disposed on the contact surface between the door frame and the door panel assembly. The sealing device includes an elastic sealing strip disposed around the door panel assembly, which is used to achieve weatherproofing between the door frame and the door panel assembly when the door panel assembly is in the closed position.

[0055] The present invention provides a complete sealing device 6 at the contact perimeter between the door frame 1 and the door panel assembly 2. The core of this device is an elastic sealing strip (usually made of weather-resistant, oil-resistant, and aging-resistant rubber or silicone material) that surrounds the door opening and is fixed in the sealing groove of the door frame 1. When the door panel assembly 2 is forcefully pulled to the closed position by the locking device, the edges of each door panel (211, 212, 221, 222) will uniformly and stably compress the sealing strip, causing it to undergo elastic deformation.

[0056] The weatherproof door also includes a locking device disposed on the back of the door panel assembly. The locking device includes a retractable latch or locking bar, and a lock hole or lock seat that cooperates with the door frame to mechanically lock the door panel assembly in the closed position to the door frame. This invention provides a locking device 7 on the back of the door panel assembly 2. This device is an active, rigid mechanical locking mechanism, typically including a retractable latch (or locking bar, lock hook) installed on the back of the door panel (especially the upper door panel), and a lock hole or lock seat precisely fitted to it at a corresponding position on the door frame.

[0057] Once the door is closed, the bolt extends manually, hydraulically, or electrically, directly and rigidly engaging the lock cylinder. This provides the primary locking force that pulls the door panel assembly 2 towards and presses it firmly against the door frame, serving as the direct power source to ensure the sealing strip reaches its predetermined compression and achieves an effective seal. Its locking force is far greater than that provided by hinges or ordinary bolts.

[0058] When the ship rolls, pitches, or encounters an impact, the locking device 7, as the main stress point, can effectively transfer the load borne by the door panel to the sturdy door frame and bulkhead structure, preventing the door panel from accidentally popping open or shifting and damaging the seal due to external forces, thus ensuring the safety and integrity of the compartment.

[0059] The weatherproof door also includes a linkage locking device, which is horizontally disposed between the back sides of the upper left door panel and the upper right door panel, and / or between the back sides of the lower left door panel and the lower right door panel, for locking the left and right door panel assemblies together when the door panel assembly is closed.

[0060] It is worth mentioning that, given that the door panel assembly 2 of the present invention is composed of two independent components (21, 22) on the left and right sides, in order to ensure that the two can work together as a whole when closed and prevent gaps caused by deformation or pressure difference, the present invention specifically provides a linkage locking device 8. This device spans the left and right door panel assemblies and specifically includes an upper linkage lock disposed between the back of the upper left door panel 211 and the upper right door panel 221, and / or a lower linkage lock disposed between the back of the lower left door panel 212 and the lower right door panel 222.

[0061] The interlocking mechanism tightens the left and right door panel assemblies together at the seam, eliminating the gap and ensuring that the vertical seam in the middle, along with the seals at the top, bottom, and sides, forms a complete and continuous sealing loop. This is crucial for preventing wind and rain from seeping in through the seam.

[0062] When one side of the door panel is subjected to pressure (such as the impact of ocean waves), the linkage locking device 8 can transfer part of the load to the other side of the door panel, so that the left and right door panels work together to deform, which enhances the overall pressure resistance and avoids overloading of one side of the door panel.

[0063] This device is typically designed to be linked to the main locking mechanism 7 or operated by a central control handle. Operators only need to move in one position to simultaneously lock or unlock both door panels, simplifying operation and preventing omissions. Simultaneously, it ensures that the connection between the left and right door panels must be disengaged before opening the door, further enhancing the safety and certainty of the operation.

[0064] The weatherproof door also includes at least one set of detachable locking pin mechanisms, which include a pin sleeve and a mating pin on the door frame or door panel, for providing additional mechanical locking when the door panel assembly is in the closed position. The pin must be manually pulled out before opening the door.

[0065] Each side hinge in the side hinge assembly is a multi-section linkage hinge or a heavy-duty hinge, with its axis of rotation parallel to the vertical edge of the door frame. The side hinge assembly 3 in this invention is specifically implemented as a high-performance dedicated hinge. A preferred embodiment is a multi-section linkage hinge or a heavy-duty hinge, with its axis of rotation strictly designed to be parallel to the vertical edge of the door frame.

[0066] This hinge consists of multiple short links and pivots connected in series. It enables a smooth, arc-shaped movement trajectory, resulting in a gentler door movement and less impact during the initial and final stages of opening and closing. Simultaneously, it distributes the significant bending moment from the door's weight and wind loads across multiple connection points and a longer stress-bearing area of ​​the door frame, optimizing load distribution and reducing localized stress, making it particularly suitable for extra-large and extra-heavy doors.

[0067] The lower door panel drive device and the hatch drive device are linked and controlled by a hydraulic system or an electrical control system, so that the door opening action is executed in a preset sequence: first, the locking device and the locking pin mechanism are released, then the lower door panel drive device is activated to flip the lower door panel open, and finally the hatch drive device is activated to flip the entire door panel assembly upward and open.

[0068] The lower door panel drive device 4, the hatch drive device 5, the locking device 7, and the locking pin mechanism 9 are coordinated by a central hydraulic or electrical control system. The preset, irreversible door opening sequence is as follows: First, release the locking device 7 and pull out the locking pin 9; second, activate the lower door panel drive device 4 to flip and open the lower door panel; third, activate the hatch drive device 5 to flip and open the entire door assembly 2.

[0069] The control system mandates through programming that the lower door panel must move before the entire door panel. This completely eliminates the possibility of friction-induced opening due to operational errors from an electromechanical control perspective, ensuring that the original intention of zero wear on the bottom seal is achieved 100%.

[0070] The system can be designed with a robust interlocking circuit or hydraulic logic valve assembly. For example, power / oil supply to the lower door drive valve is only granted upon receiving confirmation signals that the locking device is fully open and the latch has been removed; similarly, power / oil supply to the hatch drive valve is only granted upon receiving sensor signals that the lower door panel has rotated to the correct position (e.g., ≥90°). This forms an automated, error-proof safety system that effectively prevents mechanical damage or even personal injury caused by equipment malfunctions or sequence errors.

[0071] Furthermore, this application provides a method for opening and closing a top-hinged feng shui-sealed door. First, all mechanical locking and locking devices are released, and the operator manually removes the removable locking bolt that provides the final mechanical lock. This action serves as a physical confirmation that the door has entered an operable state.

[0072] By manually, hydraulically, or electrically controlling the retraction of the main locking device (latch / bar) located on the back of the door panel, disengaging it from the keyhole or lock seat on the door frame. This step releases the main locking force that tightly presses the door panel against the door frame.

[0073] If a linkage locking device is installed, it needs to be unlocked so that the left and right door panel components can separate or move independently at the middle joint.

[0074] Secondly, the lower door panel is driven to flip upwards, actively disengaging from the bottom seal.

[0075] After the control system confirms that all locks have been released (via sensor signals or manual confirmation), it activates the lower door panel drive mechanism (such as a hydraulic cylinder or electric push rod). The drive mechanism actuates, pushing the lower left and lower right door panels, causing them to rotate upwards synchronously or sequentially around the connecting hinges that are connected to the corresponding upper door panels.

[0076] The lower door panel continues to rotate until it forms an angle of at least 90° with the upper door panel (usually vertical or greater). At this position, the bottom edge of the lower door panel and the sealing strip installed on it are completely and vertically lifted away from the threshold of the door frame, achieving zero-contact safe separation of the bottom sealing surface.

[0077] Third, drive the entire door panel assembly to flip upwards and open.

[0078] The control system only activates the door drive unit (such as the main control cylinder) after receiving a signal that the lower door panel has flipped into place. The door drive unit pushes or pulls the door assembly (including the already flipped-up lower door panel), causing it to rotate upwards around the vertical axis of the side hinge assembly and open. The door assembly rotates to full opening or any predetermined opening angle. Due to the absence of frictional resistance at the bottom, this process requires minimal driving force, operates smoothly, and consumes little energy.

[0079] The hatch is closed as follows:

[0080] First, drive the entire door assembly to rotate downwards and close. Control the door drive device to reverse its action, smoothly rotating the door assembly downwards until the upper door panels and the lower door panel, which is still in the open position, roughly return to the door frame plane position.

[0081] Second, drive the lower door panel to flip downwards and reset, pre-applying a tight sealant. After the entire door panel is in place, control the lower door panel drive device to reverse its movement. Drive the lower left and lower right door panels to flip downwards, returning them from an angled position with the upper door panel to a closed position coplanar with the upper left and upper right door panels. During this process, the sealing strip at the bottom of the lower door panel is vertically and gently applied to the door frame threshold, preventing lateral scratches.

[0082] Third, lock and seal. Operate the linkage locking device to pull the left and right door panel assemblies taut and align them at the mid-section seam, ensuring the continuity of the vertical sealing line. Operate the main locking device to extend its bolt and forcefully engage the lock hole on the door frame. This action generates a strong mechanical pull, locking the entire door panel assembly (including the aforementioned patented technology that has been reset). Finally, as an additional safety guarantee and procedural requirement, manually insert the locking bolt to achieve the final physical lock.

[0083] Those skilled in the art should understand that the embodiments of the present invention described above and shown in the accompanying drawings are merely examples and do not limit the present invention. The objectives of the present invention have been fully and effectively achieved. The functions and structural principles of the present invention have been demonstrated and explained in the embodiments, and any variations or modifications may be made to the implementation of the present invention without departing from the stated principles.

Claims

1. A marine top-loading weatherproof door, characterized in that, The system includes a door frame, a door panel assembly, a side hinge assembly, a lower door panel drive device, and a hatch drive device. The door panel assembly includes a left door panel assembly and a right door panel assembly. The left door panel assembly includes an upper left door panel and a lower left door panel connected by a first connecting hinge. The right door panel assembly includes an upper right door panel and a lower right door panel connected by a second connecting hinge. The side hinge assembly includes a left side hinge and a right side hinge respectively disposed on both sides of the door panel assembly. One end of each side hinge... The upper and lower door panels are respectively fixed to the sides of the upper left and upper right door panels, and the other end is rotatably fixed to the corresponding position of the door frame; the lower door panel drive device is disposed between the upper and lower door panels and is used to drive the lower left and lower right door panels to independently flip upward relative to the corresponding upper door panels; one end of the door drive device is hinged to the door frame and the other end is hinged to the door panel assembly, and is used to drive the door panel assembly to rotate as a whole around the axis of the side hinge assembly to switch between the open position and the closed position.

2. The marine top-loading weatherproof door according to claim 1, characterized in that, The lower door panel drive device is a linear drive mechanism, selected from any one of hydraulic cylinder, pneumatic cylinder or electric push rod, with its cylinder body end hinged to the back of the upper door panel and its piston rod end hinged to the back of the corresponding lower door panel.

3. The marine top-loading weatherproof door according to claim 2, characterized in that, The lower door panel drive device is configured to drive the lower door panel from a closed position coplanar with the upper door panel to an open position at an angle of at least 90° with the upper door panel, so that the sealing structure at the bottom of the lower door panel is disengaged from the door frame.

4. The marine top-loading weatherproof door according to claim 1, characterized in that, The door drive device is an operating hydraulic cylinder or an electric linear actuator, which is located on the top or side of the door frame.

5. The marine top-loading weatherproof door according to claim 1, characterized in that, It also includes a sealing device disposed on the contact surface between the door frame and the door panel assembly. The sealing device includes an elastic sealing strip disposed around the door panel assembly, which is used to achieve weather sealing between the door frame and the door panel assembly when the door panel assembly is in the closed position.

6. The marine top-loading weatherproof door according to claim 1, characterized in that, It also includes a locking device disposed on the back of the door panel assembly, the locking device including a retractable latch or locking rod, and a lock hole or lock seat disposed on the door frame, for mechanically locking the door panel assembly in the closed position to the door frame.

7. The marine top-loading weatherproof door according to claim 1, characterized in that, It also includes a linkage locking device, which is disposed across the back of the upper left door panel and the upper right door panel, and / or the back of the lower left door panel and the lower right door panel, for locking the left and right door panel assemblies together when the door panel assembly is closed.

8. The marine top-loading weatherproof door according to claim 1, characterized in that, It also includes at least one set of detachable locking pin mechanisms, which include a pin sleeve and a mating pin on the door frame or door panel, for providing additional mechanical locking when the door panel assembly is in the closed position, and the pin must be manually pulled out before opening the door.

9. The marine top-loading weatherproof door according to claim 1, characterized in that, Each side hinge in the side hinge assembly is a multi-section linkage hinge or a heavy-duty hinge, with its axis of rotation parallel to the vertical edge of the door frame.

10. The marine top-loading weatherproof door according to any one of claims 1 to 9, characterized in that, The lower door panel drive device and the hatch drive device are linked and controlled by a hydraulic system or an electrical control system, so that the door opening action is executed in a preset sequence: first, the locking device and the locking pin mechanism are released, then the lower door panel drive device is activated to flip the lower door panel open, and finally the hatch drive device is activated to flip the entire door panel assembly upward and open.

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