Installation method for bidirectional movable ramp of large ro-ro passenger ship

Abstract

The invention relates to the technical field of rollover passenger ship ramp installation, in particular to an installation method of a large rollover passenger ship two-way movable ramp, which comprises the following installation steps of: (1) installing oil cylinders at four positions of the front end part and the rear end part of the left side edge and the right side edge of the movable ramp, and determining the tonnage of the oil cylinders according to the weight of the movable ramp; (2) determining the stroke of an oil cylinder according to the storey height of a warehouse of the ro-ro passenger ship and the lifting height of a movable ramp; (3) a movable pump station is selected, the volume of an oil tank of the movable pump station needs to meet the oil quantity requirements of the four oil cylinders, and the movable pump station is connected with the oil cylinders through hydraulic hoses; (4) installing an oil cylinder: installing the bottom of a cylinder seat of the oil cylinder on the main beam of the upper deck through a hinge and a pin shaft, and connecting a piston rod end of the oil cylinder to the movable ramp through a hinge and a pin shaft; and (5) switching on a power supply of the pump station, starting the pump station, and operating the oil cylinder to lift and descend the movable ramp. The method has the advantages of simplicity, high safety, high efficiency, reduction of the working intensity of workers and the like.

Description

Technical Field

[0001] The invention relates to the technical field of installation of ro-ro passenger ship ramps, in particular to an installation method of a large ro-ro passenger ship bidirectional movable ramp which is simple, safe, efficient and reduces the work intensity of staff. Background Art

[0002] As we all know, the ramp is a transition channel device from one deck to another on a ship. One end is connected to the upper deck through a hinge, and the other end can be raised and lowered by pulling the pulley and wire rope through the hydraulic cylinder on the ramp. From the functional point of view, there are one-way ramps and two-way ramps. The one-way ramp can only get on and off from one direction, while the two-way ramp can get on and off from both directions, which greatly improves work efficiency.

[0003] Since the movable ramp is usually lifted with load (loading), its structural strength is very good, so the overall weight of the ramp is very heavy. When installing the movable ramp, it is necessary to lift the ramp from the lower deck to the upper deck, and then check the positioning of the hinge, the position of the latch base, the gap between the left and right limiters, the compression of the sealing strips and other accessories. The installation of these accessories usually requires repeated lifting and lowering of the ramp. The commonly used installation method is to install a suitable number of hand chain hoists on the beam under the upper deck of the ramp storage position, and then connect the hand chain hoists through the lifting ears welded on the movable ramp. Manually pull the hand chain hoists to lift and lower the movable ramp. The movable ramp usually weighs hundreds of tons and requires 10-12 hand chain hoists. Manually pulling the hand chain hoists is time-consuming and labor-intensive, and inefficient. It is also unsafe for workers to stand on the ramp to operate. Summary of the invention

[0004] The purpose of the present invention is to solve the deficiencies of the above-mentioned prior art and to provide a method for installing a large passenger and vehicle ship's bidirectional movable ramp, which is simple, safe, efficient and reduces the workload of staff. The method can be applied to the efficient installation of similar types of movable ramps on various types of ships.

[0005] The technical solution adopted by the present invention to solve its technical problem is: A method for installing a large-scale ro-ro passenger ship bidirectional movable ramp, characterized in that the installation steps are as follows: (1) Install oil cylinders at four locations on the front and rear ends of the left and right sides of the movable ramp. Determine the tonnage of the oil cylinders based on the weight of the movable ramp; (2) Determine the stroke of the oil cylinder according to the floor height of the ro-ro passenger ship cargo hold and the height of the movable ramp; (3) Select a mobile pump station. The oil tank capacity of the mobile pump station must meet the oil volume requirements of the four cylinders. The mobile pump station is connected to the cylinders via hydraulic hoses; (4) Install the oil cylinder: Install the bottom of the oil cylinder seat on the main beam of the upper deck through hinges and pins, and connect the piston rod end of the oil cylinder to the movable ramp through hinges and pins; (5) Connect the power supply of the pump station, start the pump station, and operate the cylinder to lift and lower the movable ramp, so as to inspect and install the accessories between the movable ramp and the upper deck.

[0006] In step (1) of the present invention, the tonnage counterweight of the oil cylinder is 0.4-0.6 times the gravity of the movable ramp.

[0007] In step (4) of the present invention, an upper lifting lug is connected to the main beam of the upper deck, and the lifting lug is installed and removed at the corresponding position of the movable ramp. An upper pin hole is provided at the bottom of the cylinder seat of the oil cylinder, and the upper pin rod passes through the upper pin hole and the upper lifting lug to realize the hinge connection between the base of the oil cylinder and the main beam of the upper deck. A lower pin hole is provided at the output end of the oil cylinder, and the lower pin rod passes through the lower pin hole and the lower lifting lug to realize the hinge connection between the output end of the oil cylinder and the movable ramp.

[0008] The specific structure of the connection between the mobile pump station and the oil cylinder in step (3) described in the present invention is as follows: the oil outlet of the mobile pump station is respectively connected to the front hydraulic hose and the rear hydraulic hose, the front hydraulic hose is respectively connected to the front left oil inlet pipe and the front right oil inlet pipe through a tee pipe, the front left oil inlet pipe and the front right oil inlet pipe are respectively connected to the oil inlets of the oil cylinders on the left and right sides of the front end of the movable ramp, the rear hydraulic hose is respectively connected to the rear left oil inlet pipe and the rear right oil inlet pipe through a tee pipe, the rear left oil inlet pipe and the rear right oil inlet pipe are respectively connected to the oil inlets of the oil cylinders on the left and right sides of the rear end of the movable ramp, the oil return ports of the four oil cylinders are respectively connected to the oil return main pipe through the oil return branch pipes, the oil return main pipe is connected to the oil return port of the mobile pump station, and control valves are respectively provided on the front left oil inlet pipe, the front right oil inlet pipe, the rear left oil inlet pipe and the rear right oil inlet pipe.

[0009] In step (5) described in the present invention, after the pump station is started, the four cylinders on the movable ramp are raised and lowered simultaneously to achieve horizontal upward or downward movement of the movable ramp, the front end of the movable ramp is connected to the deck by a hinge, and the two cylinders at the rear of the movable ramp are raised or lowered simultaneously to achieve the rear downward tilt of the movable ramp, and the rear end of the movable ramp is connected to the deck by a hinge, and the two cylinders at the front of the movable ramp are raised or lowered simultaneously to achieve the front downward tilt of the movable ramp.

[0010] The present invention adopts the above method, and has the advantages of simple method, high safety, high efficiency, reduced work intensity of staff, etc. BRIEF DESCRIPTION OF THE DRAWINGS

[0011] Figure 1 It is a connection relationship diagram between the movable ramp and the deck of the present invention.

[0012] Figure 2 yes Figure 1Side view of.

[0013] Figure 3 This is the connection diagram between the mobile pump station and the oil pump. DETAILED DESCRIPTION

[0014] The present invention is further described below in conjunction with the accompanying drawings: As shown in the attached figure, a method for installing a large ro-ro passenger ship bidirectional movable ramp is characterized in that the installation steps are as follows: (1) Install the oil cylinder 2 at four positions on the front and rear ends of the left and right sides of the movable ramp 1. Determine the tonnage of the oil cylinder 2 according to the weight of the movable ramp 1; (2) Determine the stroke of cylinder 2 according to the floor height of the ro-ro passenger ship cargo hold and the height of the movable ramp 1; (3) Select a mobile pump station 3. The oil tank capacity of the mobile pump station 3 must meet the oil volume requirements of the four oil cylinders 2. The mobile pump station 3 is connected to the oil cylinders 2 via a hydraulic hose; (4) Installing cylinder 2: Install the bottom of the cylinder seat of cylinder 2 on the main beam of the upper deck through hinges and pins, and connect the piston rod end of cylinder 2 to the movable ramp 1 through hinges and pins; (5) Connect the power supply of the pump station, start the pump station, and operate the cylinder 2 to lift and lower the movable ramp 1, so as to inspect and install the accessories between the movable ramp 1 and the upper deck.

[0015] Furthermore, in the step (1), the tonnage counterweight of the oil cylinder 2 is 0.4-0.6 times the gravity of the movable ramp 1.

[0016] Furthermore, in the step (4), an upper lifting lug 4 is connected to the main beam of the upper deck, and a lifting lug 5 is installed and removed at a corresponding position of the movable ramp 1. An upper pin hole is provided at the bottom of the cylinder seat of the oil cylinder 2, and an upper pin rod passes through the upper pin hole and the upper lifting lug 4 to realize hinge connection between the base of the oil cylinder 2 and the main beam of the upper deck. A lower pin hole is provided at the output end of the oil cylinder 2, and a lower pin rod passes through the lower pin hole and the lower lifting lug 5 to realize hinge connection between the output end of the oil cylinder 2 and the movable ramp 1.

[0017] Furthermore, the specific structure of the connection between the mobile pump station 3 and the oil cylinder 2 in the step (3) is as follows: the oil outlet of the mobile pump station 3 is connected to the front hydraulic hose 6 and the rear hydraulic hose 7 respectively; the front hydraulic hose 6 is connected to the front left oil inlet pipe 8 and the front right oil inlet pipe 9 respectively through a tee pipe; the front left oil inlet pipe 8 and the front right oil inlet pipe 9 are respectively connected to the oil inlets of the oil cylinder 2 on the left and right sides of the front end of the movable ramp 1; the rear hydraulic hose 7 is connected to the rear left oil inlet pipe 10 and the rear right oil inlet pipe 11 respectively through a tee pipe; the rear left oil inlet pipe 10 and the rear right oil inlet pipe 11 are respectively connected to the oil inlets of the oil cylinder 2 on the left and right sides of the rear end of the movable ramp 1; the oil return ports of the four oil cylinders 2 are respectively connected to the oil return main pipe 13 through the oil return branch pipes 12; the oil return main pipe 13 is connected to the oil return port of the mobile pump station 3; and control valves 14 are respectively provided on the front left oil inlet pipe 8, the front right oil inlet pipe 9, the rear left oil inlet pipe 10 and the rear right oil inlet pipe 11.

[0018] Furthermore, in the step (5), after the pump station is started, the four oil cylinders 2 on the movable ramp 1 are simultaneously raised and simultaneously lowered, so that the movable ramp 1 can be horizontally moved up or down. The front end of the movable ramp 1 is connected to the deck by a hinge, and the two oil cylinders 2 at the rear of the movable ramp 1 are simultaneously raised or simultaneously lowered, so that the rear side of the movable ramp 1 can be tilted downward. The rear end of the movable ramp 1 is connected to the deck by a hinge, and the two oil cylinders 2 at the front of the movable ramp 1 are simultaneously raised or simultaneously lowered, so that the front side of the movable ramp 1 can be tilted downward.

[0019] Example: The design is based on the movable ramp 1 of deck 3-5 of project W0276 / 7 / W0284 / 5 / 6. The total weight of the movable ramp 1 is about 102t. The height from deck 3 to deck 5 is 5900mm, and the height from deck 5 to deck 7 is also 5900mm. Before installation, the ramp is placed on a 1800mm high pier. Figure 2 The height of the movable deck to be lifted is 3213mm, and the distance between the upper surface of the movable deck and the beam under the 7th deck is 8343mm. The four hydraulic cylinders 2 are arranged at the wire rope lifting position of the two-way movable ramp 1. The specific steps are as follows: (1) Install cylinders 2 at four locations on the front and rear ends of the left and right sides of the movable ramp 1. Determine the tonnage of the cylinders 2 according to the weight of the movable ramp 1. Specifically, considering the safety factor and the friction resistance coefficient during the installation process, select four 50t pulling force hydraulic cylinders 2, the cylinder diameter of the cylinder 2 is 180mm, and the rod diameter is 80mm. The cylinder 2 is equipped with a throttle valve to prevent the hydraulic pipeline from bursting and causing the cylinder 2 to drop rapidly; (2) According to the floor height of the ro-ro passenger ship cargo hold and the height of the movable ramp 1, the stroke of the cylinder 2 is determined. Considering the stroke margin (which can be applied to multiple projects), the stroke is selected as 3600 mm, the shortest length is 4470 mm, and the longest length is 7870 mm; (3) Select an electric mobile pump station 3 with a pressure of 25 MPa. The oil tank capacity of the mobile pump station 3 must meet the oil volume requirements of the four cylinders 2. The mobile pump station 3 is installed on the cylinder 2 through a hydraulic hose; The specific structure of the connection between the mobile pump station 3 and the oil cylinder 2 is as follows: the oil outlet of the mobile pump station 3 is respectively connected to the front hydraulic hose 6 and the rear hydraulic hose 7, the front hydraulic hose 6 is respectively connected to the front left oil inlet pipe 8 and the front right oil inlet pipe 9 through a three-way pipe, the front left oil inlet pipe 8 and the front right oil inlet pipe 9 are respectively connected to the oil inlet of the oil cylinder 2 on the left and right sides of the front end of the movable ramp 1, the rear hydraulic hose 7 is respectively connected to the rear left oil inlet pipe 10 and the rear right oil inlet pipe 11 through a three-way pipe, the rear left oil inlet pipe 10 and the rear right oil inlet pipe 11 are respectively connected to the movable ramp 1. The oil inlets of the oil cylinders 2 on the left and right sides of the rear end of the dynamic ramp 1 are connected, and the oil return ports of the four oil cylinders 2 are respectively connected to the oil return main pipe 13 through the oil return branch pipes 12. The oil return main pipe 13 is connected to the oil return port of the mobile pump station 3. The front left oil inlet pipe 8, the front right oil inlet pipe 9, the rear left oil inlet pipe 10, and the rear right oil inlet pipe 11 are respectively provided with control valves 14, and the above-mentioned control valves 14 are ball valves. The above-mentioned various pipes are all hydraulic hoses, and the three-way pipe is a joint. The hydraulic hoses, joints and ball valves with a pressure of 35Mp are selected.

[0020] (4) Installing the oil cylinder 2: Install the bottom of the cylinder seat of the oil cylinder 2 on the main beam of the upper deck, and install the output end of the oil cylinder 2 on the movable ramp 1; connect the upper lifting lug 4 to the main beam of the upper deck, and install and remove the lifting lug 5 at the corresponding position of the movable ramp 1. An upper pin hole is provided at the bottom of the cylinder seat of the oil cylinder 2. The upper pin rod passes through the upper pin hole and the upper lifting lug 4 to realize the hinge connection between the base of the oil cylinder 2 and the main beam of the upper deck. A lower pin hole is provided at the output end of the oil cylinder 2. The lower pin rod passes through the lower pin hole and the lower lifting lug 5 to realize the hinge connection between the output end of the oil cylinder 2 and the movable ramp 1.

[0021] (5) Turn on the power supply of the pump station and start the pump station. The cylinder 2 will lift and lower the movable ramp 1, thereby realizing the inspection and installation of accessories between the movable ramp 1 and the upper deck. After starting the pump station, the four cylinders 2 on the movable ramp 1 will rise and fall simultaneously, realizing the horizontal upward or downward movement of the movable ramp 1. The front end of the movable ramp 1 is connected to the deck through a hinge. The two cylinders 2 at the rear of the movable ramp 1 will rise or fall simultaneously, realizing the rear downward tilt of the movable ramp 1. The rear end of the movable ramp 1 is connected to the deck through a hinge. The two cylinders 2 at the front of the movable ramp 1 will rise or fall simultaneously, realizing the front downward tilt of the movable ramp 1.

[0022] The above scheme solves the problem that the installation of the movable ramp 1 depends entirely on the lifting and lowering of the hand winch by manpower, and changes the time-consuming and labor-intensive operation of multiple people into an efficient one-person operation, thereby meeting the operational requirements for the installation of the movable ramp 1. The installation method is simple and efficient, saves labor costs, improves installation efficiency, and reduces production costs. Due to the adoption of the above method, the present invention has the advantages of simple method, high safety, high efficiency, and reduced workload of staff.

Claims

1. A method for installing a large ro-ro passenger ship bidirectional movable ramp, characterized in that The installation steps are as follows: (1) Install oil cylinders at four locations on the front and rear ends of the left and right sides of the movable ramp. Determine the tonnage of the oil cylinders based on the weight of the movable ramp; (2) Determine the stroke of the oil cylinder according to the floor height of the ro-ro passenger ship cargo hold and the height of the movable ramp; (3) Select a mobile pump station. The oil tank capacity of the mobile pump station must meet the oil volume requirements of the four cylinders. The mobile pump station is connected to the cylinders via hydraulic hoses; (4) Install the oil cylinder: Install the bottom of the oil cylinder seat on the main beam of the upper deck through hinges and pins, and connect the piston rod end of the oil cylinder to the movable ramp through hinges and pins; (5) Connect the power supply of the pump station, start the pump station, and operate the cylinder to lift and lower the movable ramp, so as to inspect and install the accessories between the movable ramp and the upper deck.

2. The installation method of a large ro-ro passenger ship bidirectional movable ramp according to claim 1 is characterized in that In the step (1), the tonnage counterweight of the oil cylinder is 0.4-0.6 times the gravity of the movable ramp.

3. The installation method of a large ro-ro passenger ship bidirectional movable ramp according to claim 1 is characterized in that In the step (4), an upper lifting lug is connected to the main beam of the upper deck, and a piston rod lifting lug is installed and removed at a corresponding position of the movable ramp. An upper pin hole is provided at the bottom of the cylinder seat of the oil cylinder, and the upper pin rod passes through the upper pin hole and the upper lifting lug to realize the hinge connection between the base of the oil cylinder and the main beam of the upper deck. A lower pin hole is provided at the output end of the oil cylinder, and the lower pin rod passes through the lower pin hole and the lower lifting lug to realize the hinge connection between the output end of the oil cylinder and the movable ramp.

4. The installation method of a large ro-ro passenger ship bidirectional movable ramp according to claim 1 is characterized in that The specific structure of the connection between the mobile pump station and the oil cylinder in the step (3) is as follows: the oil outlet of the mobile pump station is respectively connected to the front hydraulic hose and the rear hydraulic hose, the front hydraulic hose is respectively connected to the front left oil inlet pipe and the front right oil inlet pipe through a tee pipe, the front left oil inlet pipe and the front right oil inlet pipe are respectively connected to the oil inlets of the oil cylinders on the left and right sides of the front end of the movable ramp, the rear hydraulic hose is respectively connected to the rear left oil inlet pipe and the rear right oil inlet pipe through a tee pipe, the rear left oil inlet pipe and the rear right oil inlet pipe are respectively connected to the oil inlets of the oil cylinders on the left and right sides of the rear end of the movable ramp, the oil return ports of the four oil cylinders are respectively connected to the oil return main pipe through the oil return branch pipes, the oil return main pipe is connected to the oil return port of the mobile pump station, and control valves are respectively provided on the front left oil inlet pipe, the front right oil inlet pipe, the rear left oil inlet pipe and the rear right oil inlet pipe.

5. The installation method of a large ro-ro passenger ship bidirectional movable ramp according to claim 1 is characterized in that In the step (5), after the pump station is started, the four oil cylinders on the movable ramp are simultaneously raised and lowered to realize horizontal upward or downward movement of the movable ramp. The front end of the movable ramp is connected to the deck by a hinge, and the two oil cylinders at the rear of the movable ramp are simultaneously raised or lowered to realize the rear downward tilt of the movable ramp. The rear end of the movable ramp is connected to the deck by a hinge, and the two oil cylinders at the front of the movable ramp are simultaneously raised or lowered to realize the front downward tilt of the movable ramp.

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