Marine hangar door

Abstract

The utility model provides a marine hangar door which comprises a hangar door main body and a threshold arranged below the hangar door main body, the threshold is opposite to the hangar door main body in the forward direction, the hangar door can be switched between a closed state and an open state in an adjustable mode, the threshold comprises a fixed threshold and at least one movable threshold, and the threshold is arranged below the fixed threshold. Wherein the movable doorsill is detachably arranged on the fixed doorsill, and when the hangar door is in the open state, the movable doorsill can be detached from the fixed doorsill, so that a doorsill channel allowing the hangar door to pass through is formed in the fixed doorsill.

Description

TECHNICAL FIELD

[0001] The utility model relates to the technical field of ship, especially a ship hangar door. BACKGROUND

[0002] As a special ship, the cable laying ship plays a key role in many important fields such as ocean engineering and submarine communication cable laying. The stern of this type of ship usually has a specially designed hangar structure. The hangar plays a very important role as a storage place for a variety of professional equipment. These devices include various precision mechanical devices for cable laying, lifting equipment, auxiliary construction tools, and related facilities to ensure operation safety.

[0003] During daily operation, the hangar door is mostly closed to ensure the safety of the ship's internal environment and meet the strict requirements of weather tightness. Due to the complex and changeable marine environment, the ship often encounters severe weather conditions such as strong winds, heavy rains, and wave impacts. If the hangar door cannot guarantee weather tightness, seawater and rainwater may enter the hangar, causing corrosion and damage to the various devices stored inside, and in severe cases, it may even affect the subsequent normal operation of the devices and their service life.

[0004] However, during actual work, the equipment in the hangar needs to be removed from the hangar for operation. For example, during submarine cable laying operations, the cable laying machine and tension adjusting device located in the hangar need to be transported through the hangar door to the appropriate operating position outside the ship, and then accurately participate in the various processes of cable laying to ensure that the cable is accurately laid on the seabed according to the predetermined route and requirements.

[0005] In addition, there are occasional work scenarios that require the hangar trolley to enter and exit the hangar. The hangar trolley usually serves as a transportation and transfer device or a material handling device on the ship. It can conveniently and quickly shuttle between the hangar and other working areas of the ship, helping to improve the efficiency of the entire operation process. For example, when some spare small tools or parts need to be transported from other storage areas of the ship to the specific equipment in the hangar for replacement or maintenance, the hangar trolley can take advantage of its convenient transportation.

[0006] However, in order to comply with the requirements of relevant shipbuilding and safety standards, the threshold of the hangar door is set to a certain height. These standards are formulated by considering various factors such as ensuring the structural stability of the ship during navigation, preventing seawater from flowing into the hangar in special circumstances, and maintaining the overall water tightness of the ship.

[0007] However, the door sill with a certain height becomes a big obstacle for the garage trolley to enter and exit. When the garage trolley needs to enter and exit the garage, due to the existence of the door sill, the trolley cannot smoothly pass through, and needs to be lifted and carried by additional manpower or mechanical equipment to cross the door sill, which undoubtedly increases the complexity of work and the cost of manpower and material resources; or the trolley may be damaged when it forcibly passes through the door sill, affecting its subsequent normal use, and even may have adverse effects on the door sill and the garage door structure connected thereto, damaging the overall sealing of the garage. Practical new type content

[0008] One of the main advantages of the present utility model is to provide a ship garage door, wherein the ship garage door is provided with two detachable movable door sills, the inside and outside of the garage door are flush after the movable door sills are detached, the distance between the movable door sills is consistent with the distance between the left and right wheels of the trolley, the trolley can freely enter and exit, and the problem of trolley passage obstruction is effectively solved.

[0009] Another advantage of the present utility model is to provide a ship garage door, wherein the ship garage door meets the requirements of the classification society and the sealing requirements, the height of the movable door sill is consistent with the surrounding door sill when the movable door sill is not detached, the normal sealing of the garage can be ensured, and relevant specifications are met; when the movable door sill is detached, the trolley can pass through conveniently, and the actual needs of the garage trolley entering and exiting are flexibly met while meeting the safety specifications of the ship and ensuring the sealing of the garage.

[0010] Another advantage of the present utility model is to provide a ship garage door, wherein the movable door sill of the ship garage door is provided with various practical devices such as limiters and compression bolt seats, and corresponding matching components are arranged on the door frame and the ship body, the cooperation between the components is achieved, such as limiting horizontal movement by the limiters, and ensuring sealing performance by extruding sealing rubber by the compression stud and the nut, so that the stability and sealing performance of the door sill during installation are ensured, and the door sill can be removed by simple operation (removing the compression nut after opening the door and lifting the movable door sill by a lifting device) when it needs to be removed, the overall structure is reasonably designed, and the operation is convenient.

[0011] The purpose of the present utility model is to provide a novel ship garage door, which can meet the relevant requirements of the classification society and the weather-tight requirements of the garage door, effectively solve the problem of garage trolley entering and exiting the garage being hindered by the door sill, and improve the convenience and efficiency during ship operation.

[0012] When the hangar trolley needs to enter or exit the hangar, the movable threshold needs to be disassembled. First, open the hangar door in the normal way, then the worker can conveniently disassemble the compression nut on the movable threshold. The compression nut here is one of the key components for fixing the movable threshold, making it in a stable installation position and ensuring the sealing performance. After disassembling the compression nut, the movable threshold can be directly lifted away from its installation position with the help of lifting equipment such as a small crane or electric hoist on the ship.

[0013] After the movable threshold is disassembled, the inner and outer ground of the hangar door can be kept flush, and the space reserved between the two movable thresholds matches the left and right wheel spacing of the hangar trolley, so that the hangar trolley can freely and smoothly enter and exit the hangar without being hindered by the threshold, greatly improving the convenience of equipment and material transportation during ship operation.

[0014] Further, a plurality of practical devices are carefully arranged on the movable threshold, including limiters, compression bolt seats, lifting bolts, sealing rubbers, and bases of compressors. Correspondingly, limit blocks, compression studs, and stainless steel compression plates are arranged on the fixed threshold (the door frame and the ship structure part connected to the door frame can be regarded as the relevant part of the fixed threshold). These components cooperate with each other to achieve stable installation and sealing function of the movable threshold.

[0015] When the movable threshold is in the closed position, the limiter on the movable threshold can be accurately clamped inside the limiter on the fixed threshold. Through this limiting structure, the horizontal movement of the movable threshold can be effectively limited, ensuring that it will not move horizontally due to ship sway, equipment collision or other external factors after installation, and ensuring its accurate and stable installation position.

[0016] At the same time, the sealing rubber on the movable threshold will be in close contact with the stainless steel compression plate of the fixed threshold at the bottom and both ends. And the compression stud on the fixed threshold can pass through the bolt seat on the movable threshold, and then by tightening the nut, the movable threshold is pressed downward along the vertical direction by the cooperation between the nut and the bolt. Under the action of this compression, the sealing rubber on the movable threshold will be compressed to an appropriate degree, so as to ensure that it can reach a state sufficient to ensure the overall sealing performance of the hangar door, effectively preventing the intrusion of wind, rain, seawater and other external factors into the hangar.

[0017] In addition, a good fit is achieved between the stainless steel pressing plates of the movable threshold and the fixed threshold. The stainless steel pressing plates of the movable threshold and the stainless steel pressing plates of the fixed threshold can be kept flush, and the gap between the two is within a controllable range. Finally, the gap between the above-mentioned stainless steel pressing plates is filled and smoothed by using silica gel, so that the movable threshold and the door frame (the fixed threshold part) can be tightly combined into a whole, like a continuous structure. In this way, when the folding door is closed, the hangar door can be normally closed like a conventional whole structure door, and problems such as jamming or poor sealing caused by the threshold structure do not occur.

[0018] According to an aspect of the present application, a ship hangar door capable of achieving the above-mentioned and other purposes and advantages comprises a hangar door body and a threshold arranged below the hangar door body, the threshold is opposite to the hangar door body, the hangar door can be adjusted to switch between a closed state and an open state, the threshold comprises a fixed threshold and at least one movable threshold, wherein the movable threshold is detachably arranged on the fixed threshold, when the hangar door is in the open state, the movable threshold can be removed from the fixed threshold to form a threshold passage on the fixed threshold.

[0019] According to an embodiment of the present application, the movable threshold further comprises a first movable threshold and a second movable threshold, wherein the first movable threshold and the second movable threshold have a gap therebetween, and the length of the gap is adapted to the wheel spacing of the trolley.

[0020] According to an embodiment of the present application, the lower edge of the movable threshold of the threshold is flush with the deck of the ship body.

[0021] According to an embodiment of the present application, the length of the upper end of the movable threshold of the threshold is longer than the length of the lower end, which facilitates the removal of the movable threshold from the fixed threshold.

[0022] According to an embodiment of the present application, the movable threshold comprises a movable threshold body and at least one limiting device arranged on the movable threshold body, and the fixed threshold comprises a fixed threshold body and at least one limiting groove arranged on the fixed threshold, wherein the limiting device of the movable threshold corresponds to the limiting groove of the fixed threshold, and when the movable threshold is installed to the threshold passage, the limiting device of the movable threshold is clamped in the limiting groove of the fixed threshold.

[0023] According to one embodiment of the present application, the movable threshold further comprises a pressing bolt base, the fixed threshold further comprises a pressing plate, the pressing plate corresponds to the pressing bolt base of the movable threshold, when in the closed state, the pressing bolt base of the movable threshold and the pressing plate of the fixed threshold are extruded with each other, so that the movable threshold and the fixed threshold keep flush, the gap is controllable within a range.

[0024] According to one embodiment of the present application, the movable threshold further comprises at least one sealing rubber, the sealing rubber is arranged between the movable threshold body of the movable threshold and the fixed threshold body of the fixed threshold, when the movable threshold and the fixed threshold are in the closed state, the sealing rubber is extruded by the movable threshold, so that the movable threshold and the fixed threshold keep sealed state.

[0025] According to one embodiment of the present application, the movable threshold further comprises a pressing bolt base, the fixed threshold further comprises a pressing plate, the pressing plate corresponds to the pressing bolt base of the movable threshold, when in the closed state, the pressing bolt base of the movable threshold and the pressing plate of the fixed threshold are extruded with each other, so that the movable threshold and the fixed threshold keep flush, the gap is controllable within a range.

[0026] According to one embodiment of the present application, the movable threshold further comprises at least one sealing rubber, the sealing rubber is arranged between the movable threshold body of the movable threshold and the fixed threshold body of the fixed threshold, when the movable threshold and the fixed threshold are in the closed state, the sealing rubber is extruded by the movable threshold, so that the movable threshold and the fixed threshold keep sealed state.

[0027] According to one embodiment of the present application, the threshold further comprises at least one filling unit, the filling unit is filled between the fixed threshold and the movable threshold, for improving the sealing effect of the threshold.

[0028] The further purposes and advantages of the present application will be fully understood by the following description and drawings.

[0029] These and other objects, features and advantages of the present application will become apparent with the following detailed description and accompanying drawings. BRIEF DESCRIPTION OF DRAWINGS

[0030] Figure 1 is a structural schematic view of a hangar door according to the first preferred embodiment of the present application.

[0031] Figure 2A and Figure 2BIt is the structure schematic view of the movable door sill of the marine hangar door according to the first preferred embodiment of the utility model.

[0032] Figure 3 It is the structure schematic view of the fixed door sill of the marine hangar door according to the first preferred embodiment of the utility model.

[0033] Figure 4 It is the structure schematic view of the sealing rubber of the marine hangar door according to the first preferred embodiment of the utility model. DETAILED DESCRIPTION

[0034] The following description is provided so that others skilled in the art can have the best understanding of the present utility model. The preferred embodiments in the following description are only examples, and other obvious variations can be conceived by those skilled in the art. The basic principles defined in the following description can be applied to other embodiments, variations, improvements, equivalents and other technical solutions without departing from the spirit and scope of the present utility model.

[0035] Those skilled in the art should understand that in the disclosure of the present utility model, the orientation or positional relationship indicated by the terms "longitudinal", "transverse", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer" and the like are based on the orientation or positional relationship shown in the drawings, which are only for the convenience of describing the present utility model and simplifying the description, and do not indicate or imply that the devices or elements referred to must have a particular orientation, be constructed and operated in a particular orientation, therefore the above terms cannot be understood as a limitation on the present utility model.

[0036] It can be understood that the term "one" should be understood as "at least one" or "one or more", that is, in one embodiment, the number of one element can be one, and in another embodiment, the number of the element can be multiple, and the term "one" cannot be understood as a limitation on the number.

[0037] Referring to the drawings of the present application Figures 1 to 4 As shown in the drawings of the present application, a marine hangar door according to the first preferred embodiment of the present application is illustrated in the following description. The marine hangar door comprises a hangar door body 10 and a door sill 20 arranged below the hangar door body 10, the door sill 20 is opposite to the hangar door body 10, the hangar door can be adjusted to switch between a closed state and an open state, when the hangar door is in the closed state, the hangar door body 10 is closely connected with the door sill 20, forming a sealing structure; when the hangar door body 10 is in the open state, the hangar door body 10 is opened, at this time the hangar door body 10 and the door sill 20 are separated from each other.

[0038] It is worth mentioning that, in the preferred embodiment of the present application, the threshold 20 is arranged above the deck of the ship body, i.e. the height of the threshold 20 is higher than the height of the deck.

[0039] The threshold 20 comprises a fixed threshold 21 and at least one movable threshold 22, wherein the movable threshold 22 is detachably arranged in the fixed threshold 21, and when the hangar door is in the open state, the movable threshold 22 can be removed from the fixed threshold 21 to form a threshold passage 201 in the fixed threshold 21. That is, the threshold 20 is further provided with at least one threshold passage 201, when the hangar door is in the open state, the movable threshold 22 can be removed from the threshold passage 201 to facilitate the trolley to pass through the threshold passage 201; when the hangar door is in the closed state, the threshold passage 201 is filled with the movable threshold 22, and the movable threshold 22 forms a sealed structure with the fixed threshold 21.

[0040] Preferably, in the preferred embodiment of the present application, the number of the movable threshold 22 of the threshold 20 is two, i.e. the movable threshold 22 further comprises a first movable threshold 221 and a second movable threshold 222, wherein the first movable threshold 221 and the second movable threshold 222 have a gap therebetween, and the length of the gap is adapted to the wheel spacing of the trolley, so that the trolley does not need to be lifted when passing through the threshold 20, and only the movable threshold 22 needs to be removed from the fixed threshold 21.

[0041] Preferably, in a specific example of the present application, the lower edge of the movable threshold 22 of the threshold 20 is flush with the deck of the ship body. More preferably, in a specific example of the present application, the length of the upper end of the movable threshold 22 of the threshold 20 is longer than the length of the lower end, which facilitates the removal of the movable threshold 22 from the fixed threshold 21.

[0042] In a specific example of the present application, the movable threshold 22 presents an inverted trapezoidal structure with a long upper end and a narrow lower end.

[0043] The movable threshold 22 comprises a movable threshold body 221 and at least one limiting stopper 222 arranged on the movable threshold body 221, and the fixed threshold 21 comprises a fixed threshold body 211 and at least one limiting groove 212 arranged on the fixed threshold 211, wherein the limiting stopper 222 of the movable threshold 22 corresponds to the limiting groove 212 of the fixed threshold 21, and when the movable threshold 22 is installed to the threshold passage 201, the limiting stopper 222 of the movable threshold 22 is clamped in the limiting groove 212 of the fixed threshold 21.

[0044] The movable threshold 22 further comprises at least one pressing bolt seat 223, which is used to fix the movable threshold body 221 of the movable threshold 22 in the threshold channel 201 of the fixed threshold 21, wherein the fixed threshold 21 further comprises at least one pressing stud 213, wherein the pressing bolt seat 223 of the movable threshold 22 cooperates with the pressing stud 213 of the fixed threshold 21 to fix the movable threshold 22 in the threshold channel 201.

[0045] The movable threshold 22 further comprises at least one lifting mechanism 224, wherein the lifting mechanism 224 is arranged at the end of the movable threshold body 221, and when it is necessary to move the movable threshold 22 out of the threshold channel 201, the movable threshold 22 is lifted out of the threshold channel 201 by the lifting mechanism 224.

[0046] The movable threshold 22 further comprises at least one presser base 225, wherein the fixed threshold 21 further comprises at least one presser plate 214, wherein the presser plate 214 corresponds to the presser base 225 of the movable threshold 22, and when in the closed state, the presser base 225 of the movable threshold 22 and the presser plate 214 of the fixed threshold 21 are pressed against each other, so that the movable threshold 22 and the fixed threshold 21 are flush, with a controllable gap.

[0047] The movable threshold 22 further comprises at least one sealing rubber 226, wherein the sealing rubber 226 is arranged between the movable threshold body 221 of the movable threshold 22 and the fixed threshold body 211 of the fixed threshold 21, and when the movable threshold 22 and the fixed threshold 21 are in the closed state, the sealing rubber 226 is pressed by the movable threshold 22, so that the movable threshold 22 and the fixed threshold 21 are kept in a sealed state.

[0048] The threshold 20 further comprises at least one filling unit 24, wherein the filling unit 24 is filled between the fixed threshold 21 and the movable threshold 22, for improving the sealing effect of the threshold 20.

[0049] As an example, in this preferred embodiment of the present application, the filling unit 24 is implemented as silica gel.

[0050] The hangar door body 10 comprises a door frame 11 and a door panel assembly 12 arranged outside the door frame, and at least one turnover device, wherein the turnover device is connected with the door panel assembly 12, one end of the turnover device is fixed on the door frame 11, and the turnover device can drive the door panel assembly 12 to turn over from bottom to top, so as to be folded from an unfolded state to a folded state, or the turnover device can drive the door panel assembly 12 to turn over from top to bottom, so as to be unfolded from the folded state.

[0051] The door panel assembly 12 comprises at least two door panels 121 and at least one connecting unit 122 connecting the at least two door panels 121, wherein the turnover device can drive the at least two door panels 121 to turn over upwardly or downwardly, so as to adjust the state of the door panel assembly 12. The connecting unit 122 is arranged between the at least two door panels 121 and connects the at least two door panels 121. As an example, in the preferred embodiment of the present application, the at least two door panels 121 are in an up-down structure, that is, the turnover device can drive the at least two door panels 121 to turn over along the up-down direction.

[0052] The hangar door body 10 further comprises at least one locking assembly 13, wherein the locking assembly 13 is arranged at the abutting position of the door frame 11 and the at least two door panels 121 of the door panel assembly 12, and when the folding watertight door is in a closed state, the locking assembly 13 is used for locking the door panel assembly 12 and the door frame 11, so that the door panel assembly 12 is in a locked state. When the locking assembly 13 locks the door panel assembly 12 and the door frame 11, the door panel assembly 12 and the door frame 11 are in a pressed state, and the water tightness of the folding watertight door is further realized.

[0053] It is worth mentioning that the overall structure of the hangar door is installed and in an initial state as follows: the ship hangar door of the utility model is installed at the hangar opening of the stern of a cable-laying ship or other special ship, and the overall structure comprises the above-mentioned folding door panel (which is composed of an upper door panel and a lower door panel connected through a middle hinge) and a uniquely designed threshold structure (which is composed of at least two movable thresholds and a surrounding fixed threshold).

[0054] During the shipbuilding process, when the hangar door is installed, the fixed threshold part is first firmly installed on the ship body structure corresponding to the hangar opening. The fixed threshold is integrated with the ship body through reliable connection modes such as welding, riveting or high-strength bolt connection, so as to ensure that the position is fixed and the structure is stable, and can withstand various external forces during ship navigation, such as sea wave impact, inertial force generated by ship shaking and the like.

[0055] Then install the movable threshold, place the movable threshold with various devices (limiting device, compression bolt seat, lifting bolt, sealing rubber, compression device base, etc.) to the preset installation position, so that the movable threshold is accurately aligned with the fixed threshold in the vertical and horizontal directions. At this time, the limiting device on the movable threshold can correspond to the position of the limiting block on the fixed threshold, preparing for the subsequent limiting cooperation.

[0056] Then, the compression stud on the fixed threshold is passed through the bolt seat of the movable threshold, and the nut is screwed on, but the complete tightening operation is temporarily not performed in order to properly adjust the sealing rubber and other components subsequently. In this initial state, the movable threshold and the surrounding fixed threshold appear to be a continuous whole from the appearance, the height is consistent, and there is no obvious gap or height difference from the appearance inside and outside the hangar, meeting the basic requirements of the hangar door for the overall appearance and preliminary sealing, and also meeting the preliminary inspection standards of the classification society for the structural integrity and standardization of the hangar door.

[0057] The sealing and fixing operation process of the movable threshold is as follows: after the movable threshold is initially installed in place, the key operation steps of sealing and fixing are started. The staff will carefully check the installation of the sealing rubber on the movable threshold to ensure that the sealing rubber is intact and adheres to the corresponding installation surface of the movable threshold. Then, the nuts corresponding to the compression studs passing through the bolt seat of the movable threshold on the fixed threshold are tightened step by step, and the compression state of the sealing rubber is continuously observed during the tightening process.

[0058] As the nuts are gradually tightened, the movable threshold will slowly move downward along the vertical direction under the action of the compression studs and nuts, causing the sealing rubber to be gradually deformed. When the sealing rubber is squeezed to just fill the small gap between the movable threshold and the fixed threshold, and the sealing rubber and the stainless steel compression plate of the fixed threshold are observed to be in close and seamless contact at the bottom and both ends, it means that the sealing rubber has reached the ideal compression state that can ensure good sealing performance of the hangar door. At this time, stop tightening the nuts to avoid excessive compression of the sealing rubber, which may cause damage or premature aging of the sealing rubber, affecting the durability of the sealing.

[0059] At the same time, the stainless steel compression plate of the movable threshold also moves downward with the movable threshold, gradually approaching and finally keeping level with the stainless steel compression plate of the fixed threshold, with a gap between them controlled within a very small range, for example, the gap width is not more than 1-2 mm. This small gap can ensure that the two stainless steel compression plates do not rub against each other or collide under normal deformation or slight movement of the ship, and also provides suitable conditions for subsequent silicone filling and smoothing operations.

[0060] Afterwards, the staff uses high-quality silica gel material, using a special silica gel filling tool, silica gel is evenly filled into the gap between the movable threshold and the stainless steel compression plate of the fixed threshold, and the filling process ensures that the silica gel is fully filled in every gap corner to avoid the occurrence of voids or incomplete filling. After filling, use a scraper or other tools to smooth the surface of the silica gel, making it smooth and flat with the surface of the stainless steel compression plate. From the appearance, it is almost impossible to see the gap, and after the silica gel is cured, it can further enhance the connection between the movable threshold and the fixed threshold and the overall sealing performance. Thus, the sealing and fixing operation of the movable threshold is successfully completed, and the hangar door can reliably achieve the weatherproof function in the closed state.

[0061] The normal use and opening and closing operation of the hangar door is as follows: During the daily operation of the ship, when the hangar door is in the closed state and does not need to be operated for equipment or hangar trolley access, the hangar door effectively blocks the influence of external environmental factors on the interior of the hangar due to its good sealing structure and stable connection of the folding door plate. At this time, the upper door plate is tightly connected to the ship body through the end hinge, the lower door plate is connected to the upper door plate through the middle hinge, and the entire door plate structure remains stationary and stable, forming a complete closed space with the threshold to protect the safe storage of various equipment in the hangar.

[0062] When the hangar door needs to be opened to remove equipment from the hangar for operation or to allow the hangar trolley to enter the hangar for material transportation, the operator will first operate the corresponding drive device (such as an electric push rod, a hydraulic cylinder, etc., which can be installed at a suitable position between the ship body and the door plate to provide power for the folding of the door plate) to start the opening program of the folding door plate. Under normal circumstances, the drive device will first apply an upward force to make the upper door plate begin to fold upward around the top end hinge. After the upper door plate is folded to a certain angle, the lower door plate also folds upward under the linkage action of the middle hinge, gradually opening the hangar door to provide enough space for the subsequent equipment or trolley to pass through.

[0063] When the equipment is removed from the hangar or the hangar trolley completes the access operation, the hangar door needs to be closed, and the operation is performed in the reverse order. First, operate the lower door plate to apply appropriate force through the drive device to make it fold downward around the middle hinge to return to its original position. When the lower door plate is fully returned and aligned with the corresponding position of the fixed threshold, operate the upper door plate to make it fold downward around the end hinge, and finally close to its original position to restore the closed state of the hangar door. During the entire closing process, since the movable threshold and the fixed threshold have been well sealed and stably connected by the sealing rubber, stainless steel compression plate, and silica gel, the hangar door can be smoothly closed and still maintain its excellent weatherproof performance, ensuring the stability and safety of the interior environment of the hangar.

[0064] The operation of dismounting the movable threshold and the trolley in and out is shown as follows: In the case of occasional special situation that the garage trolley needs to go in and out of the garage, the movable threshold needs to be dismounted to eliminate the obstacles of the trolley in and out. First, according to the operation process of opening the garage door, the garage door is completely opened, the movable threshold is completely exposed and is in a state convenient for operation.

[0065] Then, the staff uses the corresponding tool, such as wrench, etc., to dismount the pressing nut on the movable threshold. Since the nut has been tightened according to the standard tightening torque during installation, the appropriate reverse torque needs to be applied during dismounting, and the nut is unscrewed one by one, so that the pressing stud is separated from the bolt seat of the movable threshold. After all the pressing nuts are dismounted, the movable threshold is placed on the installation position only by its own gravity, and the fixing relationship with the fixed threshold in the vertical direction is released.

[0066] Next, the operator operates the pre-prepared lifting equipment on the ship, such as a small electric hoist or electric hoist installed above the stern of the ship. The hook of the lifting equipment is reliably connected with the lifting bolt on the movable threshold through a rope or a special lifting tool, ensuring that the connection is firm and can withstand the weight of the movable threshold without safety hazards such as loosening and falling during lifting.

[0067] After confirming that the connection is correct, start the lifting equipment, slowly lift the hook, and gradually lift the movable threshold away from its installation position under the action of the lifting force, and smoothly lift it upwards. During the lifting process, the staff should closely observe the lifting state of the movable threshold to ensure that it can smoothly separate from the surrounding fixed threshold and other related structures, avoiding collision, scratching, etc. When the movable threshold is completely lifted off the installation position, it can be lifted to the pre-designated storage area on the ship for temporary storage. At this time, the inner and outer ground of the garage door remains flush, and the distance between the two original positions of the movable threshold is exactly the same as the distance between the left and right wheels of the garage trolley.

[0068] Subsequently, the garage trolley can be directly driven into the garage interior along the flat ground outside the garage door without any obstacles, or driven out from the interior to the outside of the garage door, and the work task of material transportation or equipment transfer can be conveniently and quickly completed. When the trolley in and out operation is completed, if it is necessary to restore the integrity of the garage door to ensure the weatherproof performance, according to the reverse operation sequence, the movable threshold is lifted back to the original installation position using the lifting equipment, then the pressing nut is reinstalled, and the movable threshold is sealed and fixed again according to the above operation steps, so that the garage door is restored to the normal state of being usable and well sealed.

[0069] Through the above detailed specific embodiments, it can be clearly seen that the specific operation process of the marine hangar door structure in practical application and how to effectively realize that both the requirements of the classification society and the weather tightness performance are met and the key problem of the obstacle of the hangar trolley entering and exiting is solved, a more convenient, efficient and reliable solution is provided for the hangar use of the cable laying ship and other special ships.

[0070] Those skilled in the art will understand that the embodiments of the utility model shown in the above description and the drawings are only as examples and do not limit the utility model. The purpose of the utility model has been completely and effectively realized. The function and structural principle of the utility model have been shown and explained in the embodiments, and the embodiments of the utility model can have any deformation or modification without departing from the principle.

Claims

1. A hangar door for a ship, characterized in that A hangar door including a hangar door body and a threshold disposed below the hangar door body, the threshold being opposite to the hangar door body, the hangar door being adjustably switchable between a closed state and an open state, the threshold including a fixed threshold and at least one movable threshold, wherein the movable threshold is detachably disposed in the fixed threshold, the movable threshold being detachable from the fixed threshold when the hangar door is in the open state to form a threshold passage in the fixed threshold.

2. The hangar door according to claim 1, wherein the movable threshold further includes a first movable threshold and a second movable threshold, wherein the first movable threshold and the second movable threshold have a spacing therebetween, the spacing being adapted to the wheel spacing of a trolley.

3. The hangar door according to claim 2, wherein the lower edge of the movable threshold of the threshold is flush with the deck of the hull.

4. The hangar door according to claim 3, wherein the upper end of the movable threshold of the threshold is longer than the lower end to facilitate detachment of the movable threshold from the fixed threshold.

5. The hangar door according to claim 3, wherein the movable threshold includes a movable threshold body and at least one stopper disposed in the movable threshold body, the fixed threshold includes a fixed threshold body and at least one stopper slot disposed in the fixed threshold, wherein the stopper of the movable threshold corresponds to the stopper slot of the fixed threshold, the stopper of the movable threshold being clamped in the stopper slot of the fixed threshold when the movable threshold is installed in the threshold passage.

6. The hangar door according to claim 5, wherein the movable threshold further includes a press bolt seat for fixing the movable threshold body of the movable threshold in the threshold passage of the fixed threshold, wherein the fixed threshold further includes a press bolt, wherein the press bolt seat of the movable threshold cooperates with the press bolt of the fixed threshold to fix the movable threshold in the threshold passage.

7. The hangar door according to claim 6, wherein the movable threshold further includes at least one lifting mechanism, wherein the lifting mechanism is disposed at the end of the movable threshold body, the movable threshold being lifted out of the threshold passage by the lifting mechanism when the movable threshold needs to be removed from the threshold passage.

8. The hangar door according to claim 7, wherein the movable threshold further includes a presser base, wherein the fixed threshold further includes a presser plate, wherein the presser plate corresponds to the presser base of the movable threshold, the presser base of the movable threshold and the presser plate of the fixed threshold being pressed against each other when in the closed state, such that the movable threshold and the fixed threshold are kept flush with a controllable range of gap.

9. The marine hangar door according to claim 8, wherein said movable threshold further comprises at least one sealing rubber, wherein said sealing rubber is arranged between said movable threshold body of said movable threshold and said fixed threshold body of said fixed threshold, and said sealing rubber is pressed by said movable threshold when said movable threshold and said fixed threshold are in a closed state, so that a sealing state is maintained between said movable threshold and said fixed threshold.

10. The marine hangar door according to claim 9, wherein said threshold further comprises at least one filling unit, wherein said filling unit is filled between said fixed threshold and said movable threshold for improving a sealing effect of said threshold.

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