Folding type opening door for cable laying ship and working method of folding type opening door

Abstract

The invention belongs to the technical field of ship equipment, and discloses a folding opening door for a cable laying ship and a working method thereof.The door comprises a hangar, a lower door assembly, an upper door assembly, a connecting assembly, a fixing assembly and a hoisting assembly; a door frame of the hangar is provided with a lower door assembly and an upper door assembly through a connecting assembly and a fixing assembly. The lower door assembly comprises a lower door, a first hinge, a hinge rod and a first opening hydraulic cylinder. The lower end of the lower door is connected with the door frame through connecting assemblies and fixing assemblies. The fixing assembly comprises a fixing clamp and an operating handle; the fixing clamp is installed at the bottom of the lower door leaf, provided with the operating handle and matched with the fixing nose on the lower door frame. Left and right ends of the lower door are connected with the door frame through connecting assemblies; the hinge rod is connected with the lower door leaf, the upper door leaf and the first opening hydraulic cylinder. One end of the first opening hydraulic cylinder is rotatably mounted on the upper door frame, and the other end is rotatably connected with the hinge rod. The situation that the cabin door is opened by mistake due to cargo collision is avoided.

Description

Technical Field

[0001] The invention belongs to the technical field of ship equipment, and in particular relates to a foldable opening door for a cable-laying ship and a working method thereof. Background Art

[0002] Submarine optical cables are the submarine nerves that realize global interconnection and are important carriers of information and communication. According to statistics, optical cables carry most of the international data transmission. Once a submarine optical cable fails, the entire national economy will be in danger of paralysis. Cable-laying vessels are special ships used to transport, lay and repair optical cables. With the increasing demand for optical cable transportation, laying and repair, cable-laying vessels are now required to carry a large amount of cable-laying materials during work. However, due to the limitation of the volume and space of cable-laying vessels, the hangar doors of traditional cable-laying vessels are generally set as single doors. Although the opening method is simple, the single door increases the difficulty of material handling, resulting in reduced handling efficiency and long handling time. In addition, due to the limited opening space of the hatch door, the operating space for the handling personnel is narrow, which seriously threatens the personal safety of the handling personnel during the handling process.

[0003] Related reference CN110454034A discloses a folding hangar door, comprising a first door body and a second door body arranged in sequence from top to bottom, wherein the first door body is hinged to the hangar side wall by a first hinge, and the second door body is hinged to the first door body by a second hinge, and a first flipping device for driving the first door body to rotate around the first hinge is provided between the first door body and the hangar side wall, and a second flipping device for driving the second door body to rotate around the second hinge is provided between the second door body and the first door body. It also comprises a lifting cylinder, wherein the first hinge plate is hinged to the hangar side wall, the lifting cylinder is connected to the hangar side wall, and the protruding end of the lifting cylinder is connected to the first hinge plate. The first door body and the second door body are flipped over the door opening. Although the problem of space shortage is solved, it cannot avoid the door from opening by mistake. Summary of the invention

[0004] The technical problem to be solved by the present invention is to provide a foldable opening door for a cable-laying vessel and a working method thereof, which ensures that the hatch door has sufficient opening space and prevents the hatch door from being opened by mistake.

[0005] In order to solve the above technical problems, the present invention provides a foldable opening door for a cable-laying ship, comprising a hangar, a lower door assembly, an upper door assembly, and a connecting assembly, and also comprising a fixing assembly and a hoisting assembly; the door frames around the hangar exit are installed with the lower door assembly and the upper door assembly through the connecting assembly and the fixing assembly; the lower door assembly comprises the lower door, a first hinge, a hinge rod, and a first opening hydraulic cylinder; the lower end of the lower door is connected to the door frame through the connecting assembly and the fixing assembly; the fixing assembly comprises a fixing clamp and an operating handle; the fixing clamp is installed at the bottom of the lower door, the operating handle is installed on the fixing clamp, and the fixing clamp cooperates with the fixing nose on the lower door frame; the left and right ends of the lower door are connected to the door frame through the connecting assembly; the hinge rod is respectively connected to the lower door, the upper door and the first opening hydraulic cylinder; one end of the first opening hydraulic cylinder is rotatably installed on the upper door frame, and the other end is rotatably connected to the hinge rod. A fixing assembly is provided on the lower door, which is connected and fixed by the fixing clamp on the lower door and the fixing nose on the lower door frame, so that the cabin door is firmly fixed to the cabin body, thereby avoiding the situation where the cabin door is opened by mistake due to the collision of cargo.

[0006] Preferably, the lower door assembly is installed at the bottom of the upper door assembly through a connecting assembly; the upper door assembly includes an upper door, a second opening hydraulic cylinder, and a second hinge; the upper end of the upper door is installed on the upper door frame through the second hinge; the left and right ends of the upper door are connected to the door frame through a connecting assembly; one end of the second opening hydraulic cylinder is rotatably installed on the door frame, and the other end is rotatably installed on the upper door.

[0007] Preferably, the connecting assembly includes a first connecting hydraulic cylinder, a connecting rod, a second connecting hydraulic cylinder, a threshold and a third connecting hydraulic cylinder; The first connecting hydraulic cylinder is installed in the lower door frame; the middle ear plate of the connecting rod is installed on the hydraulic rod of the first connecting hydraulic cylinder, the opening and closing plate is rotatably installed on the connecting rod, and the bottom surface of the lower door is provided with an opening and closing hole; Preferably, a second connecting hydraulic cylinder is installed in the hangar side door frame, and a pin hole is provided on the side wall of the lower door; a driving pin is rotatably provided on the hydraulic rod of the second connecting hydraulic cylinder, and the driving pin is matched with the pin hole; Preferably, a third connecting hydraulic cylinder is installed on the upper door, and a connecting pin is connected to the end of the hydraulic rod of the third connecting hydraulic cylinder. The connecting pin is slidably installed on the bracket of the upper door, and a pin nose is provided on the side door frame. The connection between the lower door assembly and the hangar, and the connection between the upper door assembly and the hangar are realized through the connecting assembly, so as to further improve the connection reliability between the upper door, the lower door and the hangar, and ensure that the door is not opened by mistake.

[0008] Preferably, a removable threshold is provided on the door frames on the left and right sides of the first connecting hydraulic cylinder on the ground of the hangar exit. After the threshold is removed, the cargo with pulleys can be directly pushed out from the removable threshold without the aid of a crane, which is conducive to the transportation of the wheeled cargo.

[0009] Preferably, a positioning rod is telescopically mounted on the upper door through a positioning frame, and the positioning rod is square; a square positioning hole is arranged at the end of the first opening hydraulic cylinder. After the lower door is opened, the positioning rod is inserted into the square positioning hole at the end of the first opening hydraulic cylinder to achieve clamping, and when the lower door is opened, the first opening hydraulic cylinder is fixedly connected to the upper door to prevent the lower door from flipping downward.

[0010] Preferably, the hoisting assembly includes a hanging beam and a hook; the hanging beam is installed on the upper door, and the hook is installed on the hanging beam. After the upper door is opened, the hanging beam faces downward, so that the cargo can be transported to the outside of the deck through the hook, saving manpower and material resources required for transportation, and completely eliminating the difficulty of cargo transfer by connecting the hatch door and the hanging beam.

[0011] A working method of a foldable opening door for a cable-laying ship, comprising the following steps: Step 1: Disconnect the fixed connection between the hangar and the lower door assembly; S11: Preparation for opening the lower door assembly, the fixing clamp is connected to the hangar, the operating handle is connected to the fixing clamp, and the operating handle is turned to disconnect the connection between the lower door and the door frame; S12: The first connecting hydraulic cylinder extends to drive the opening and closing plate to rotate downward, disconnecting the fixed connection between the lower door and the hangar; S13: The hydraulic rods of the second connecting hydraulic cylinders on the left and right sides extend to drive the pins to be retracted into the hangar, thereby disconnecting the fixed connection between the lower door and the two side walls of the hangar; Step 2: Open the lower door upwards until it overlaps with the upper door; S21: The lower door assembly is opened, the first opening hydraulic cylinder extends downward, drives the hinge rod to rotate downward, drives the lower door to rotate through the hinge, and the opening angle changes continuously; S22: Open the lower door assembly upward to a 90° position; S23: The first opening hydraulic cylinder continues to extend downward, driving the hinge rod to continue to rotate downward, and the lower door is continuously opened upward to a 180° state; S24: inserting the positioning rod into the square positioning hole at the end of the first opening hydraulic cylinder, connecting the positioning rod to the first opening hydraulic cylinder, at this time, the hydraulic rod of the first opening hydraulic cylinder is fixed, the lower door does not move, and the lower door and the upper door are overlapped and fixed; Step 3: The hydraulic rod of the third connecting hydraulic cylinder extends into the door to disconnect the connection between the hangar and the upper door; Step 4: Open the upper door assembly upward to 90°; S41: the upper door assembly is opened, the second opening hydraulic cylinder of the upper door extends upward, driving the lower door to rotate through the hinge, thereby changing the opening angle of the lower door; S42: Open the upper door assembly upward continuously to a 90° state; Step 5: All hatches are opened; S51: The hook moves on the lifting beam to move the goods stored in the hangar; S52: Remove the left and right thresholds, and transport the goods from the thresholds. This allows the goods to be directly transported from the thresholds to the open deck.

[0012] The lower door can be opened separately according to the operating steps, or it can be folded and opened with the upper door. Through these five steps, the opening method can be determined according to the actual handling situation, thereby improving the handling efficiency of cable laying materials, shortening the handling time, and saving handling costs. When the goods with pulleys are transported out through the detachable threshold, the lower door is opened separately to save energy and costs. When the two doors are opened at the same time, the opening area of ​​the cabin door is fully expanded, increasing the walking passage for the handling personnel, and compared with a single door, the folding double door greatly reduces the transfer blind area from the hangar car to the exposed deck crane.

[0013] Compared with the prior art, the present invention has the following beneficial effects: 1. The present invention eliminates the blind area of ​​transportation. The folding double doors fully expand the opening area of ​​the cabin door, increase the walking passage for the transport personnel, and compared with the single door, the folding double doors greatly reduce the transfer blind area from the hangar car to the exposed deck crane, making the cargo transfer between the cabin hangar and the open deck more convenient.

[0014] 2. The invention is safe and reliable. The door and the cabin are firmly fixed. A fixing assembly is provided on the lower door. The fixing clip on the lower door is connected and fixed with the fixing nose on the lower door frame, which avoids the door from opening by mistake due to collision with cargo. A detachable threshold is provided at the bottom of the hangar. After the threshold is removed, the cargo equipped with pulleys can be directly pushed out from the detachable threshold without the help of a crane.

[0015] 3. The present invention realizes the connection between the lower door assembly and the hangar, and the connection between the upper door assembly and the hangar through the connecting assembly, further improving the connection reliability between the upper door, the lower door and the hangar, and ensuring that the cabin door is not opened by mistake.

[0016] 4. The structure of the present invention is highly innovative. The upper door is connected to a hanging beam that can carry two tons of weight. After the upper door is opened, the hanging beam faces downward, so that the goods can be transported to the outside of the deck through the sling, saving the manpower and material resources required for transportation. The connection between the hatch door and the hanging beam completely eliminates the difficulty of transporting goods below two tons.

[0017] 5. The folding door of the present invention has a novel opening method. The lower door can be opened alone or folded together with the upper door to open. In this way, the opening method can be determined according to the actual transportation situation. This structure can improve the transportation efficiency of cable laying materials, shorten the transportation time, save transportation costs, and improve the cable laying efficiency.

[0018] 6. After the lower door is opened, the present invention inserts the positioning rod into the square positioning hole at the end of the first opening hydraulic cylinder to achieve clamping, and when the lower door is in the open state, the first opening hydraulic cylinder is fixedly connected to the upper door to avoid the lower door from flipping downward. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] Figure 1 This is a diagram of the double-leaf door of the present invention in a closed state; Figure 2 A closed side view of the double-leaf door of the present invention; Figure 3 This is a side view of the lower door of the present invention when it is opened 90°; Figure 4 This is a side view of the lower door of the present invention when it is opened 180°; Figure 5 This is a side view of the upper door of the present invention when it is opened 90°; Figure 6 This is a state diagram of the lower door of the present invention being opened 90°; Figure 7 This is a state diagram of the lower door of the present invention being opened 180°; Figure 8 This is a state diagram of the upper door of the present invention being opened 90°; Fig. 9 This is a state diagram of the double-leaf door of the present invention after opening and removing the threshold.

[0020] Drawing number: 100-hangar, 200-lower door assembly, 300-upper door assembly, 400-connecting assembly, 500-fixing assembly, 600-hoisting assembly; 21-lower door, 22-first hinge, 23-hinge rod, 24-first opening hydraulic cylinder; 31-upper door, 32-second opening hydraulic cylinder, 33-second hinge; 41-first connecting hydraulic cylinder, 42-connecting rod, 43-second connecting hydraulic cylinder, 44-threshold, 45-third connecting hydraulic cylinder; 51-fixing clamp, 52-operating handle, 53-fixing pin; 61-hanging beam, 62-hook, 1-opening and closing plate, 2-driving pin, 3-connecting pin, 4-positioning hole. DETAILED DESCRIPTION

[0021] In order to more clearly illustrate the technical solution of the present application, the technical solution of the present application is further described in detail below in conjunction with the accompanying drawings: like Figure 1As shown, a foldable opening door for a cable-laying ship provided by the present application includes a hangar 100, a lower door assembly 200, an upper door assembly 300, a connecting assembly 400, a fixing assembly 500, and a hoisting assembly 600. The hangar 100 is located at the middle and rear part of the hull and around the foldable opening door of the present application. The lower door assembly 200 is connected and disconnected with the upper door assembly 300 around by the connecting assembly 400 and the fixing assembly 500. A removable threshold 44 is installed at the lower part. After the threshold 44 is removed, the wheeled cargo can be directly pushed out from the removable threshold 44 without passing through the hoisting assembly 600. The lower door assembly 200 is arranged at the exit of the hangar 100, with the upper door assembly 300 at the top and the lower door frame and the threshold 44 at the bottom. When it is in the open state, it is convenient to carry cargo from the hangar 100 to the hull deck, and a continuous opening angle can be achieved to expand the cargo handling space according to the cargo volume. When it is closed, The upper door assembly 300 is located above the lower door assembly 200 and is connected to the lower door assembly 200 through the connection assembly 400. The upper door assembly 200 can decide whether to open or not according to actual needs. When it is in the open state, it greatly reduces the transfer blind area between the hangar 100 and the open deck, making the transfer of goods between the hangar 100 and the open deck more convenient. If it is in a closed state when it is not needed to be opened, it can reduce the heat loss of the hangar; the connection assembly 400 is used to realize two main connections between the components of the opening door: one is to realize the connection between the lower door assembly 200 and the hangar 100, and the other is the connection between the upper door assembly 300 and the hangar 100. The fixing assembly 500 is arranged between the lower door assembly 200 and the hangar 100, so that the door can be closed when it is not opened, avoiding the loss caused by the goods hitting the open hangar door due to the poor transportation environment during transportation. The hoisting assembly 600 includes a hanging beam 61 and a hook 62. The beam 61 is connected to the upper door 31, and its length matches the length of the top of the hangar 100. The hook 62 slides on the beam 61, so that the hook 62 moves back and forth to carry the goods. When the lower door assembly 200 and the upper door assembly 300 are both opened and folded together, the beam 61 faces downward, and the hook 62 can move on the beam 61, so that the objects can be lifted from the hangar 100 to the open deck.

[0022] like Figure 2As shown, the lower door assembly 200 includes a lower door 21, a first hinge 22, a hinge rod 23, and a first opening hydraulic cylinder 24. The lower end of the lower door 21 is connected to the hangar 100 through a connecting assembly 400, connected to the lower door frame through a fixing assembly 500, and connected to the hangar 100 through the connecting assembly 400 at both ends. The upper part is connected to the upper door 31 through a first hinge 22. There are four first hinges 22 distributed between the two doors. The hinge rod 23 is connected to the lower door 21, the upper door 31, and the first opening hydraulic cylinder 24 respectively. The first opening hydraulic cylinder 24 drives the lower door 21 to open through the hinge rod 23. One end of the first opening hydraulic cylinder 24 is rotatably mounted on the upper door frame through a pin shaft, and a square positioning hole 4 is provided at the end. The other end of the first opening hydraulic cylinder 24 is rotatably connected to the driving hole of the hinge rod 23 through a pin shaft, and is used to open and close the lower door 21. An opening and closing hole is provided on the bottom surface of the lower door 21, and a pin hole is provided on the side wall of the lower door 21. The hinge rod 23 is a two-section type, and the two sections are rotatably connected by a pin shaft. A pin shaft hole is provided at one end of the hinge rod 23, and is connected to the ear plate on the upper door 31 by a pin shaft. A pin shaft hole is also provided at the other end of the hinge rod 23, and is connected to the hole of the driving plate on the lower door 21 by a pin shaft. In the working state, the end of the hinge rod 23 connected to the upper door 31 is fixed, and the first opening hydraulic cylinder 24 can drive the hinge rod 23 to achieve different rotations under different extension lengths, thereby driving the lower door 21 to complete the transformation of different angles. The upper door assembly 300 includes an upper door 31, a second opening hydraulic cylinder 32, and a second hinge 33; the lower end of the upper door 31 is connected to the lower door 21, and the upper end is connected to the upper door frame by the second hinge 33, and the left and right sides are connected to the hangar 100 by the connecting assembly 400. The left and right positioning rods 53 are evenly distributed on the upper part of the upper door 31. The positioning rods 53 are telescopically installed on the upper door 31 through a positioning frame, and the positioning frame is installed on the upper door frame through a hinge. The positioning rod 53 is square, and the side wall is provided with a gear part, the gear part and the gear mesh, the gear is located in the positioning frame, and a handle is installed on the gear, and the handle extends out of the positioning frame. After the lower door 21 is opened, the positioning rod 53 is inserted into the square positioning hole 4 at the end of the first opening hydraulic cylinder 24 by rotating the handle to achieve clamping. When the lower door 21 is in the open state, the first opening hydraulic cylinder 24 is fixedly connected with the upper door 31 to avoid the situation that the lower door 21 flips downward. One end of the second opening hydraulic cylinder 32 is connected to the ear plate on the door frame of the hangar 100 through a pin shaft, and the other end is connected to the ear plate on the upper door 31 through a pin shaft. The upper door 31 is opened and closed by telescopic means. The second hinge 33 connects the upper door 31 and the upper door frame when the upper door 31 realizes angle change.

[0023] The connection assembly 400 includes a first connection hydraulic cylinder 41, a connection rod 42, a second connection hydraulic cylinder 43, a threshold 44, and a third connection hydraulic cylinder 45. The first connection hydraulic cylinder 41 is rotatably mounted on the floor of the hangar 100 through a bracket ear plate, and is located at the hydraulic cylinder mounting hole in the lower door frame. The connection rod 42 is located above the first connection hydraulic cylinder 41, and the connection between the lower door 21 and the door leaf is disconnected by extending the hydraulic rod and cooperating with the connection rod 42. The ear plate in the middle of the connection rod 42 is rotatably connected to the first connection hydraulic cylinder 41, and a through hole is provided on the connection rod 42, and an obtuse opening and closing plate 1 is installed on the through hole through a pin. The opening and closing plate 1 is rotatably mounted on the lower door frame through a pin at the angle, so that the lower door 21 can be separated from the lower door frame and the lower door 21 is opened. The second connecting hydraulic cylinder 43 is installed on the side wall of the hangar 100, located at the hydraulic cylinder mounting hole in the side door frame. The hydraulic rod end of the second connecting hydraulic cylinder 43 is rotatably installed with a driving pin 2 with an angle. The driving pin 2 is installed on the side door frame through an axis at the angle. The driving pin 2 cooperates with the pin hole, extends through the hydraulic rod, and the driving pin 2 retracts into the warehouse so that the lower door 21 is disconnected from the hangar 100. The threshold 44 is distributed on the left and right sides of the first connecting hydraulic cylinder 41 and can be removed. The threshold 44 is installed in the card slot of the lower door frame through the blocks at both ends, and the threshold 44 can be removed by lifting it upward. Or the threshold 44 extends out of the mounting plate through its two ends, and the mounting plate is connected to the lower door frame with screws, and it can be removed by loosening the screws. After the threshold 44 is removed, the goods equipped with pulleys can be directly pushed out from the detachable threshold without the help of a crane, which is more conducive to the transportation of wheeled goods. The third connecting hydraulic cylinder 45 is installed on the upper door 31, and the end of the hydraulic rod of the third connecting hydraulic cylinder 45 is connected to the pin 3, and the connecting pin 3 is slidably installed in the through hole of the bracket, and the bracket is installed on the upper door 31. A pin nose is provided on the side door frame, and the hydraulic rod is extended, and the connecting pin 3 is retracted into the door so that the upper door 31 is disconnected from the hangar 100. The connection between the lower door assembly 200 and the hangar 100, and the connection between the upper door assembly 300 and the hangar 100 are realized through the connecting assembly 400, which further improves the connection reliability of the upper door 31, the lower door 21 and the hangar 100, and ensures that the cabin door is not opened by mistake.

[0024] The fixing assembly 500 includes a fixing clamp 51 and an operating handle 52. The fixing clamp 51 is located at the bottom edge of the lower door 21 and is connected to the operating handle 52. The operating handle 52 is connected to the lower door 21. The fixing clamp 51 is in an obtuse angle shape and is rotatably mounted on the lower door 21 at the angle. The operating handle 52 is provided with a rotating shaft. The operating handle 52 is mounted on the lower door 21 through the rotating shaft. One end of the operating handle 52 has a strip-shaped opening. A fixing pin is provided in the strip-shaped opening. The fixing pin can slide in the strip-shaped opening. The fixing pin is rotatably connected to the fixing clamp 51. The fixing clamp 51 cooperates with a fixing nose on the lower door frame. When the operating handle 52 is rotated, the lower door 21 can be separated from the lower door frame.

[0025] like Figure 3-Figure 5 As shown, a technical method for opening a foldable door for a cable-laying ship is mainly realized by the cooperation of a lower door assembly 200 and an upper door assembly 300 with other components. When the lower door assembly 200 is in an open state, the opening angle of the lower door 21 is mainly controlled by the first opening hydraulic cylinder 24 until the lower door 21 overlaps with the upper door 31. The opening process of the lower door 21 does not require manpower to move the heavy hangar door. During the opening process, the first opening hydraulic cylinder 24 drives the hinge rod 23 so that the lower door 21 can achieve a change in the opening angle under the rotation of the hinge 22. The upper door 31 realizes continuous change of different angles in the whole process through the second opening hydraulic cylinder 32. Taking the opening operation as an example, the closing operation is the reverse process of the opening operation. During the opening operation of the lower door 21, the lower door 21 and the upper door 31 are connected by the hinge 22 to achieve a rotation connection. One end of the rod 23 is connected to the first opening hydraulic cylinder 24, one end is connected to the upper door 21, and the other end is connected to the lower door 21. When the first opening hydraulic cylinder 24 is extended downward, it drives the hinge rod 23 to rotate downward, and the upper door 31 does not move, thereby realizing the opening of the lower door 21. The opening angle is determined according to the extension length of the first opening hydraulic cylinder 24, and finally the lower door can be opened to 180° and overlap with the upper door 31. In the opening operation of the upper door 31, the upper door 31 is connected to the upper door frame by the second hinge 33. When the second opening hydraulic cylinder 32 is extended upward, it drives the upper door 31 to rotate. The opening angle is also determined according to the extension length of the second opening hydraulic cylinder 32. The maximum opening angle of the upper door is 90°. The opening and closing processes of the lower door 21 and the upper door 31 are all achieved by extending and retracting the hydraulic rod, thereby ensuring the stability of this process.

[0026] like Figure 6-Figure 9 The diagram shows the opening state of the lower door 21 and the upper door 31. The opening operation includes the first opening hydraulic cylinder 24 controlling the lower door 21 to open continuously to 180°, and the second opening hydraulic cylinder 32 controlling the upper door 31 to open continuously to 90°. Through the opening door and operation steps designed in this application, the original single door is divided into upper and lower leaves. The upper door 31 is equipped with a transfer hanging beam 61. According to the needs of the operation, the door leaf can open the lower door 21 alone or fold and open the upper and lower door leaves, etc. The hanging beam 61 of this application can carry two tons of weight. When the two doors are folded, the hanging beam 61 faces downward, and the goods can be directly lifted to the open deck, saving the manpower and material resources required for transportation, and completely eliminating the difficulty of transferring non-overweight goods. Compared with a single door, the folding door greatly reduces the transfer blind area. The way of connecting the cabin door with the hanging beam 61 makes the transfer of goods between the hangar and the open deck more convenient.

[0027] The lower door assembly 200 and the upper door assembly 300 are in a closed state before opening. In order to ensure more convenient cargo handling in the hangar 100, the closing step of the lower door assembly 200 and the upper door assembly 300 is a reverse operation of the opening step. The opening steps of the lower door assembly 200 and the upper door 300 are described as follows: Step 1: First, disconnect the fixed connection between the hangar 100 and the lower door assembly 200.

[0028] S11: The lower door assembly 200 is ready to be opened, the fixing clamp 51 is connected to the hangar 100, the operating handle 52 is connected to the fixing clamp 51, and the operating handle 52 is turned to disconnect the connection between the lower door 21 and the door frame.

[0029] S12: The first connecting hydraulic cylinder 41 extends to drive the opening and closing plate 1 to rotate downward, thereby disconnecting the fixed connection between the lower door assembly 200 and the hangar 100.

[0030] S13: The hydraulic rods of the second connection hydraulic cylinders 43 on the left and right sides extend out, driving the pin 2 to be retracted into the hangar 100, disconnecting the fixed connection between the lower door 21 and the two side walls of the hangar 100.

[0031] Step 2: The lower door 21 is opened upwards until it overlaps with the upper door 31 .

[0032] S21: The lower door assembly 200 is opened. The first opening hydraulic cylinder 24 extends downward by a certain length, driving the hinge rod 23 to rotate downward, driving the lower door 21 to rotate through the hinge 22 to achieve continuous changes in the opening angle.

[0033] S22: Open the lower door assembly 200 upward to a 90° position.

[0034] S23: The first opening hydraulic cylinder 24 continues to extend downward, driving the hinge rod 23 to continue to rotate downward, and the lower door 21 is continuously opened upward to a 180° state.

[0035] S24: Rotate the handle of the positioning rod 53, insert the positioning rod 53 into the square positioning hole 4 at the end of the first opening hydraulic cylinder 24, and connect the positioning rod 53 to the first opening hydraulic cylinder 24. At this time, the hydraulic rod of the first opening hydraulic cylinder 24 is fixed, and the lower door 21 does not move, so that the lower door 21 and the upper door 31 are overlapped and fixed.

[0036] Step 3: The hydraulic rod of the third connecting hydraulic cylinder 45 extends into the door to disconnect the connection between the hangar 100 and the upper door 31 .

[0037] Step 4: The upper door assembly 300 is opened upward to a 90° position.

[0038] S41: The upper door assembly 300 is opened. The second opening hydraulic cylinder 32 of the upper door 31 extends upward by a certain length, driving the lower door 31 to rotate through the hinge 33, thereby changing the opening angle of the lower door 31.

[0039] S42: Open the upper door assembly 300 continuously upward to a 90° state.

[0040] Step 5: All hatches are open.

[0041] S51 : The hook 62 moves on the hanging beam 61 to transport the goods stored in the hangar 100 .

[0042] S52: Remove the left and right door sills 44 so that the cargo can be directly transported from the door sills 44 to the open deck.

[0043] The lower door can be opened separately according to the operating steps, or it can be folded and opened with the upper door. Through these five steps, the opening method can be determined according to the actual handling situation, thereby improving the handling efficiency of cable laying materials, shortening the handling time, and saving handling costs. When the goods with pulleys are transported out through the detachable threshold, the lower door is opened separately to save energy and costs. When the two doors are opened at the same time, the opening area of ​​the cabin door is fully expanded, increasing the walking passage for the handling personnel, and compared with a single door, the folding double door greatly reduces the transfer blind area from the hangar car to the exposed deck crane.

[0044] Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that various changes, modifications, substitutions and variations may be made to the embodiments without departing from the principles and spirit of the present invention, and that the scope of the present invention is defined by the appended claims and their equivalents.

Claims

1. A foldable opening door for a cable-laying vessel, comprising a hangar, a lower door assembly, an upper door assembly, and a connecting assembly, characterized in that: It also includes a fixing component and a lifting component; the door frames around the hangar exit are installed with the lower door component and the upper door component through the connecting component and the fixing component; the lower door component includes the lower door, the first hinge, the hinge rod, and the first opening hydraulic cylinder; the lower end of the lower door is connected to the door frame through the connecting component and the fixing component; the fixing component includes a fixing clamp and an operating handle; the fixing clamp is installed at the bottom of the lower door, the operating handle is installed on the fixing clamp, and the fixing clamp cooperates with the fixing nose on the lower door frame; the left and right ends of the lower door are connected to the door frame through the connecting component; the hinge rod is respectively connected to the lower door, the upper door and the first opening hydraulic cylinder; one end of the first opening hydraulic cylinder is rotatably installed on the upper door frame, and the other end is rotatably connected to the hinge rod.

2. A foldable opening door for a cable-laying vessel according to claim 1, characterized in that: The lower door assembly is installed at the bottom of the upper door assembly through a connecting assembly; the upper door assembly includes an upper door, a second opening hydraulic cylinder, and a second hinge; the upper end of the upper door is installed on the upper door frame through the second hinge; the left and right ends of the upper door are connected to the door frame through a connecting assembly; one end of the second opening hydraulic cylinder is rotatably installed on the door frame, and the other end is rotatably installed on the upper door.

3. A foldable opening door for a cable-laying vessel according to claim 2, characterized in that: The connecting assembly includes a first connecting hydraulic cylinder, a connecting rod, a second connecting hydraulic cylinder, a threshold and a third connecting hydraulic cylinder; The first connecting hydraulic cylinder is installed in the lower door frame; the middle ear plate of the connecting rod is installed on the hydraulic rod of the first connecting hydraulic cylinder, the opening and closing plate is rotatably installed on the connecting rod, and the opening and closing hole is arranged on the bottom surface of the lower door.

4. A foldable opening door for a cable-laying vessel according to claim 3, characterized in that: A second connecting hydraulic cylinder is installed in the hangar side door frame, and a pin hole is arranged on the side wall of the lower door; a driving pin is rotatably arranged on the hydraulic rod of the second connecting hydraulic cylinder, and the driving pin is matched with the pin hole.

5. A foldable opening door for a cable-laying vessel according to claim 4, characterized in that: The upper door is provided with a third connecting hydraulic cylinder, the end of the hydraulic rod of the third connecting hydraulic cylinder is connected with a pin, the connecting pin is slidably installed on the bracket of the upper door, and a pin nose is arranged on the side door frame.

6. A foldable opening door for a cable-laying vessel according to claim 3, characterized in that: Removable thresholds are arranged on the door frames on the left and right sides of the first connecting hydraulic cylinder on the ground of the hangar exit.

7. A foldable opening door for a cable-laying vessel according to claim 2, characterized in that: A positioning rod is telescopically mounted on the upper door through a positioning frame, and the positioning rod is square; a square positioning hole is arranged at the end of the first opening hydraulic cylinder.

8. A foldable opening door for a cable-laying vessel according to claim 1, characterized in that: The hoisting assembly comprises a hoisting beam and a hoisting hook; the hoisting beam is installed on the upper door, and the hoisting hook is installed on the hoisting beam.

9. A working method for a foldable opening door for a cable-laying vessel, characterized in that: The steps include: Step 1: Disconnect the fixed connection between the hangar and the lower door assembly; S11: Preparation for opening the lower door assembly, the fixing clamp is connected to the hangar, the operating handle is connected to the fixing clamp, and the operating handle is turned to disconnect the connection between the lower door and the door frame; S12: The first connecting hydraulic cylinder extends to drive the opening and closing plate to rotate downward, disconnecting the fixed connection between the lower door and the hangar; S13: The hydraulic rods of the second connecting hydraulic cylinders on the left and right sides extend to drive the pins to be retracted into the hangar, thereby disconnecting the fixed connection between the lower door and the two side walls of the hangar; Step 2: Open the lower door upwards until it overlaps with the upper door; S21: The lower door assembly is opened, the first opening hydraulic cylinder extends downward, drives the hinge rod to rotate downward, drives the lower door to rotate through the hinge, and the opening angle changes continuously; S22: Open the lower door assembly upward to a 90° position; S23: The first opening hydraulic cylinder continues to extend downward, driving the hinge rod to continue to rotate downward, and the lower door is continuously opened upward to a 180° state; S24: inserting the positioning rod into the square positioning hole at the end of the first opening hydraulic cylinder, connecting the positioning rod to the first opening hydraulic cylinder; Step 3: The hydraulic rod of the third connecting hydraulic cylinder extends into the door to disconnect the connection between the hangar and the upper door; Step 4: Open the upper door assembly upward to 90°; S41: The upper door assembly is opened, and the second opening hydraulic cylinder of the upper door extends upward, driving the lower door to rotate through the hinge; S42: Open the upper door assembly upward continuously to a 90° state; Step 5: All hatches are opened; S51: The hook moves on the lifting beam to move the goods stored in the hangar; S52: Remove the left and right thresholds and transport the goods from the thresholds.

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