Movable ramp of large automobile roll-on-roll-off transport ship and mounting method

Abstract

The invention relates to the technical field of ship roll-on and roll-off equipment, and discloses a large automobile roll-on and roll-off transport ship movable ramp and a mounting method.The large automobile roll-on and roll-off transport ship movable ramp comprises a first hinge mount, a first ramp joint is rotatably arranged on the first hinge mount, and a second ramp joint is arranged at the end, away from the first hinge mount, of the first ramp joint; the end, away from the first ramp joint, of the second ramp joint is connected with a third ramp joint, a second hinge seat is arranged on the surface of the upper end of the hull structure and located on the inner side of the first hinge seat, a hinge shaft is arranged on the second hinge seat, and the second hinge seat is rotationally connected with the end of the third ramp joint through the hinge shaft. According to the movable ramp of the large automobile roll-on-roll-off transport ship, by arranging the supporting assembly and pulling out the positioning plug pin, when the third ramp section is lifted, the sliding block can slide along the rail base, then the positioning pin is clamped into the positioning hole, it is guaranteed that the position of the sliding block is fixed, then the supporting rod can effectively support the third ramp section, and the requirement for safe passing of automobiles is met.

Description

Technical Field

[0001] The invention relates to the technical field of ship roll-on / roll-off equipment, in particular to a movable ramp of a large-scale automobile roll-on / roll-off transport ship and an installation method thereof. Background Art

[0002] With the rapid development of global trade, the import and export volume of automobiles has been increasing. Large-scale car ro-ro ships are the main mode of marine transportation of automobiles. Cars enter the cargo hold decks through ramps (inner passages) for fixed transportation. Ramps can be divided into fixed / mobile, tight / non-tight and other types. Since the movable ramp needs to be rotated for operation, its convenience of use directly affects the safety and efficiency of ro-ro ships.

[0003] Movable ramps are usually designed as lifting / rotating, electric / hydraulic, capstan / cylinder arm-lifting types, etc. During the production process of electric cylinder arm-lifting movable ramps, since the movable ramps of large car roll-on / roll-off ships are generally large in specifications, with a length and width of more than ten meters, and some are even dozens of meters, the existing ramp structure is single and inconvenient to adjust. When the movable ramp is in the raised state, it is only supported by the cylinder, and the stability of the ramp is poor and easy to be damaged.

[0004] After the ramp is manufactured, if the sections are not pre-assembled in the workshop, it will easily cause modification and rework during the actual ship installation stage, and even affect the construction cost and production cycle. During the ramp manufacturing stage, if it is pre-assembled in the workshop, not only more tooling frames need to be made, but also the layout is more difficult. In the case of non-water (air) tightness, there is no effective installation method. Therefore, it is necessary to provide a movable ramp for large-scale automobile roll-on / roll-off transport ships to solve the above problems. Summary of the invention

[0005] In view of the deficiencies in the prior art, the present invention provides a movable ramp for a large-scale roll-on / roll-off automobile transport ship and an installation method, which solves the problems mentioned in the above background.

[0006] The present invention provides the following technical solution: a movable ramp of a large-scale automobile roll-on / roll-off transport ship is installed on a hull structure, comprising a No. 1 hinge seat, the No. 1 hinge seat is arranged on the upper end surface of the hull structure, a first ramp section is rotatably arranged on the No. 1 hinge seat, a second ramp section is arranged at one end of the first ramp section away from the No. 1 hinge seat, the first ramp section is rotatably connected to the second ramp section through a pin shaft, a third ramp section is connected at one end of the second ramp section away from the first ramp section, a No. 2 hinge seat is arranged on the upper end surface of the hull structure and located inside the No. 1 hinge seat, a hinge shaft is arranged on the No. 2 hinge seat, and the No. 2 hinge seat is rotatably connected to the end of the third ramp section through the hinge shaft;

[0007] A deck is provided on one side of the hull structure, a mounting platform is provided between the hull structure and the deck, cylinder bases are provided at both ends of the upper surface of the mounting platform, a cylinder lifting arm is provided on the cylinder base, and one end of the cylinder lifting arm away from the cylinder base is connected to the third ramp section, and support components are provided on both sides of the upper surface of the deck;

[0008] The support assembly comprises a support rod, two of which are provided, and the two support rods are rotatably arranged on both sides of the lower end surface of the third ramp section.

[0009] Preferably, a connecting assembly is provided at one end of the second ramp section away from the first ramp section, the connecting assembly includes a locking hook pin and a limiting pad, the locking hook pin includes two locking hooks and two locking pins, the two locking hooks are respectively fixedly arranged on both sides of the upper end surface of the third ramp section, and the two locking pins are respectively fixedly arranged on both sides of the second ramp section.

[0010] Preferably, the limit pad is arranged on the upper end surface of the third ramp section close to the second ramp section, the limit pad is composed of a movable pad and a fixed pad located at the lower end of the movable pad, an installation groove is opened on the upper end surface of the second ramp section away from the first ramp section, a limit axis is arranged in the installation groove of the second ramp section, and the second ramp section is provided with a wing plate through the limit axis.

[0011] Preferably, the support assembly also includes a track seat, a slider and an L-shaped limit block. The slider is slidably arranged inside the track seat. The lower end of the support rod is rotatably connected to the slider through a connecting shaft. A strip groove is opened on the side wall of the track seat.

[0012] Preferably, a convex strip is provided at the middle end of the slider away from the support rod, the convex strip of the slider passes through the strip groove and is connected to the L-shaped limit block, a positioning pin is provided on the L-shaped limit block, a through hole is provided in the center of the slider for the positioning pin to pass through, and a plurality of positioning holes are provided on the track seat at equal distances.

[0013] Preferably, both sides of the upper end surface of the third ramp section are provided with clamping grooves, fixing screws are arranged in the clamping grooves, and the third ramp section is provided with a guardrail assembly through the clamping grooves.

[0014] Preferably, the guardrail assembly includes a guardrail body and a clamping seat, the clamping seat is clamped in a clamping groove and fixed by a fixing screw, and the guardrail body is arranged on the upper end surface of the clamping seat.

[0015] Preferably, a rubber pad is provided at one end of the third ramp section away from the second hinge seat.

[0016] Preferably, receiving grooves are provided on both sides of the upper surface of one end of the third ramp section close to the rubber pad, and a wire rope hook is provided inside the receiving groove via a limiting pin.

[0017] Preferably, the method for installing a movable ramp of a large-scale roll-on / roll-off automobile transport ship comprises the following steps:

[0018] S1. First, complete the main structure welding of each section to ensure that the specification size and welding deformation are controlled within the tolerance range;

[0019] S2. Secondly, use the wire drawing or lighting method to locate and check the center line of the hinge shaft, and sequentially spot weld, adjust and weld the hinge seats at the ends of the first and third ramp sections used for turning the ramp angle, and weld the wing plate and hinge between the second and third ramp sections to the second ramp section and connect them through the limit shaft;

[0020] S3. Again, pre-assemble the first ramp section and the second ramp section, and weld and connect the hinge base and the shaft pin according to the above method; then, only spot weld and apply the locking hook pin and the limit pad;

[0021] S4, the actual ship installation stage of the movable ramp: the lower end of the third ramp section is in contact with the deck, and the ro-ro equipment and the base of the hull position are installed and welded in turn; then the first ramp section and the paired No. 1 hinge seat are put in place, and since the first ramp section, the second ramp section and the wing plate are previously connected as a whole and fit the third ramp section, the initial positioning of the locking hook pin and the thickness of the limit pad in this ramp posture can be checked;

[0022] S5, ramp power-on debugging stage: adjust the third ramp section to other postures, check the locking hook pin and limit pad again, measure the best size, and finally weld and paint after processing.

[0023] Compared with the prior art, the present invention has the following beneficial effects:

[0024] 1. The movable ramp of the large-scale roll-on / roll-off transport ship for automobiles is provided with a support assembly. When the positioning pin is pulled out, when the third ramp section is lifted, the slider can slide along the track seat, and then the positioning pin is stuck in the positioning hole to ensure that the position of the slider is fixed, and then the support rod can effectively support the third ramp section, which is easy to operate, ensures the stability of the third ramp section, and meets the safe passage of automobiles.

[0025] 2. The movable ramp of the large automobile roll-on / roll-off transport ship is provided with a clamping groove. When the clamping seat is clamped into the clamping groove, the clamping groove can effectively limit the forward, backward, left and right movement of the clamping seat. Then, by adding a fixing screw, the clamping seat can be effectively prevented from moving up and down, so that the guardrail assembly is easy to install and the stability of the clamping seat and the guardrail body is effectively guaranteed. The rubber pad is provided to effectively prevent the end of the third ramp section from being damaged due to friction or collision, thereby extending the service life of the third ramp section. The storage groove is provided to facilitate the storage of the wire rope hook. The wire rope hook is provided to facilitate the lifting or lowering of the third ramp section by the wire rope in an emergency.

[0026] 3. The installation method of the movable ramp of the large-scale roll-on / roll-off automobile transport ship reduces the risk of rework at the dock and wharf construction site, effectively ensures the quality of design and installation, and can reduce the waste of workshop site resources such as horizontal tire frames and cranes. It can be promoted and applied to the production and construction of movable ramps of different sizes and types, and has wide applicability. BRIEF DESCRIPTION OF THE DRAWINGS

[0027] Figure 1 This is a schematic diagram of the overall structure of the movable ramp of the large-scale roll-on / roll-off automobile transport ship of the present invention;

[0028] Figure 2 This is the second schematic diagram of the overall structure of the movable ramp of the large-scale automobile roll-on / roll-off transport ship of the present invention;

[0029] Figure 3 It is a schematic diagram of the structure of the support assembly of the present invention;

[0030] Figure 4 It is a schematic diagram of the installation structure of the third ramp section and the guardrail assembly of the present invention;

[0031] Figure 5 is a schematic structural diagram of the third ramp section of the present invention;

[0032] Figure 6 It is a schematic diagram of the installation structure of the rubber pad of the present invention;

[0033] Figure 7 It is a structural schematic diagram of the guardrail assembly of the present invention;

[0034] Figure 8 It is a structural schematic diagram of the second hinge seat of the present invention;

[0035] Fig. 9 For the present invention Figure 1 A magnified schematic diagram of the structure in the middle.

[0036] In the figure: 1, hull structure; 101, mounting platform; 102, deck; 2, hinge seat No. 1; 3, first ramp section; 4, second ramp section; 5, third ramp section; 501, snap-in groove; 502, fixing screw; 503, storage groove; 504, wire rope hook; 6, hinge seat No. 2; 601, hinge shaft; 7, cylinder base; 8, cylinder lifting arm; 9, support assembly; 901, track seat; 902, slider; 903, L-shaped limit block; 904, support rod; 905, positioning pin; 906, positioning hole; 10, rubber pad; 11, guardrail assembly; 1101, guardrail body; 1102, snap-in seat; 12, wing plate; 13, connecting assembly; 1301, lock hook; 1302, lock hook; 1303, limit pad. DETAILED DESCRIPTION

[0037] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0038] See also Figure 1-9 , a movable ramp for a large-scale automobile roll-on / roll-off transport ship is installed on a hull structure 1, and is characterized in that it includes a No. 1 hinge seat 2, which is arranged on the upper end surface of the hull structure 1, and a first ramp section 3 is rotatably arranged on the No. 1 hinge seat 2, and a second ramp section 4 is arranged at one end of the first ramp section 3 away from the No. 1 hinge seat 2, and the first ramp section 3 is rotatably connected to the second ramp section 4 through a pin shaft, and a third ramp section 5 is connected to one end of the second ramp section 4 away from the first ramp section 3, and a No. 2 hinge seat 6 is arranged on the upper end surface of the hull structure 1 and located inside the No. 1 hinge seat 2, and a hinge shaft 601 is arranged on the No. 2 hinge seat 6, and the No. 2 hinge seat 6 is rotatably connected to the end of the third ramp section 5 through the hinge shaft 601;

[0039] A deck 102 is provided on one side of the hull structure 1, and a mounting platform 101 is provided between the hull structure 1 and the deck 102. Cylinder bases 7 are provided at both ends of the upper surface of the mounting platform 101, and a cylinder lifting arm 8 is provided on the cylinder base 7. The end of the cylinder lifting arm 8 away from the cylinder base 7 is connected to the third ramp section 5, and support components 9 are provided on both sides of the upper surface of the deck 102;

[0040] The support assembly 9 includes a support rod 904 . Two support rods 904 are provided. The two support rods 904 are rotatably arranged on both sides of the lower end surface of the third ramp section 5 .

[0041] Among them; a connecting component 13 is provided at one end of the second ramp section 4 away from the first ramp section 3, the connecting component 13 includes a locking hook pin and a limiting pad 1303, the locking hook pin includes two locking hooks 1301 and two locking pins 1302, the two locking hooks 1301 are respectively fixed on both sides of the upper end surface of the third ramp section 5, and the two locking pins 1302 are respectively fixed on both sides of the second ramp section 4. By providing the locking hooks 1301 and the locking pins 1302, when the locking hooks 1301 and the locking pins 1302 are engaged with each other, an effective connection between the second ramp section 4 and the third ramp section 5 can be achieved.

[0042] Among them; the limiting pad 1303 is arranged on the upper surface of the third ramp section 5 close to the second ramp section 4, the limiting pad 1303 is composed of a movable pad and a fixed pad located at the lower end of the movable pad, the upper surface of the second ramp section 4 away from the first ramp section 3 is provided with an installation slot, a limiting axis is arranged in the installation slot of the second ramp section 4, the second ramp section 4 is provided with a wing plate 12 through the limiting axis, the fixed pad has been welded in the segmented production stage, the thickness of the movable pad is confirmed and processed according to the measurement results after power-on operation, the plane length and width dimensions are slightly smaller than the fixed pad, it is placed on the fixed pad for welding, and the wing plate 12 is arranged to ensure that the car can pass back and forth unimpeded.

[0043] Among them, the support assembly 9 also includes a track seat 901, a slider 902 and an L-shaped limit block 903. The slider 902 is slidably arranged inside the track seat 901. The lower end of the support rod 904 is rotatably connected to the slider 902 through a connecting shaft. A strip groove is provided on the side wall of the track seat 901. The slider 902 is provided with a convex strip at the middle end of the side away from the support rod 904. The convex strip of the slider 902 passes through the strip groove and is connected to the L-shaped limit block 903. A positioning pin 905 is provided on the L-shaped limit block 903. A through hole is provided in the center of the slider 902 for the positioning pin 905 to pass through, and a plurality of positioning holes 906 are provided on the track seat 901 at equal distances. When the positioning pin 905 is pulled out, when the third ramp section 5 is lifted, the slider 902 can slide along the track seat 901, and then the positioning pin 905 is inserted into the positioning hole 906, so as to ensure that the position of the slider 902 is fixed, and then the support rod 904 can effectively support the third ramp section 5, thereby ensuring the stability of the third ramp section 5 and meeting the safe passage of the car.

[0044] Among them, both sides of the upper end surface of the third ramp section 5 are provided with a clamping groove 501, and a fixing screw 502 is arranged in the clamping groove 501. The third ramp section 5 is provided with a guardrail assembly 11 through the clamping groove 501. The guardrail assembly 11 includes a guardrail body 1101 and a clamping seat 1102. The clamping seat 1102 is clamped in the clamping groove 501 and fixed by the fixing screw 502. The guardrail body 1101 is arranged on the upper end surface of the clamping seat 1102. By providing the clamping groove 501, when the clamping seat 1102 is clamped into the inside of the clamping groove 501, the clamping groove 501 can effectively limit the forward, backward, left and right movement of the clamping seat 1102, and then by adding the fixing screw 502, the up and down movement of the clamping seat 1102 can be effectively avoided, so that the guardrail assembly 11 is easy to install and the stability of the clamping seat 1102 and the guardrail body 1101 is effectively guaranteed.

[0045] Among them; a rubber pad 10 is provided at the end of the third ramp section 5 away from the No. 2 hinge seat 6, and storage grooves 503 are opened on both sides of the upper surface of the end of the third ramp section 5 close to the rubber pad 10. A wire rope hook 504 is provided inside the storage groove 503 through a limit pin. The rubber pad 10 can effectively prevent the end of the third ramp section 5 from being damaged due to friction or collision, and the service life of the third ramp section 5 is extended. The storage groove 503 can facilitate the storage of the wire rope hook 504. The wire rope hook 504 can facilitate the lifting or lowering of the third ramp section 5 by the wire rope in an emergency.

[0046] Working principle: the first ramp section 3 and the second ramp section 4 are rotatably connected by a pin shaft, the second ramp section 4 and the third ramp section 5 are fixed by a locking hook pin and a limiting pad 1303 between each other, and the hinge seats at one end of the first ramp section 3 and the third ramp section 5 are fixed on the hull structure 1, which can achieve a certain angle of flipping, pull out the positioning pin 905, when the third ramp section 5 is lifted, the slider 902 can slide along the track seat 901, and then the positioning pin 905 is stuck in the positioning hole 906, to ensure that the position of the slider 902 is fixed, and then the support rod 904 can effectively support the third ramp section 5, to ensure the stability of the third ramp section 5, and meet the safe passage of the car.

[0047] Furthermore, by providing a snap-in groove 501, when the snap-in seat 1102 is inserted into the snap-in groove 501, the snap-in groove 501 can effectively limit the forward, backward, left and right movement of the snap-in seat 1102, and then by adding a fixing screw 502, the snap-in seat 1102 can be effectively prevented from moving up and down, thereby making the guardrail assembly 11 easy to install and effectively ensuring the stability of the snap-in seat 1102 and the guardrail body 1101. By providing a rubber pad 10, the end of the third ramp section 5 can be effectively prevented from being damaged due to friction or collision, thereby extending the service life of the third ramp section 5. By providing a storage groove 503, it is convenient to store the wire rope hook 504. By providing the wire rope hook 504, the third ramp section 5 can be lifted or lowered by the wire rope in an emergency.

[0048] The installation method of the movable ramp of a large car roll-on / roll-off transport ship, in the case of non-water (air) tightness, includes the following steps:

[0049] S1. First, complete the main structure welding of each section to ensure that the specification size and welding deformation are controlled within the tolerance range;

[0050] S2. Next, use the wire drawing or lighting method to locate and check the center line of the hinge shaft 601, and sequentially spot weld, adjust and weld the hinge seats at the ends of the first ramp section 3 and the third ramp section 5 for turning the ramp angle, and weld the wing plate 12 and the hinge between the second ramp section 4 and the third ramp section 5 to the second ramp section 4 and connect them through the limit shaft;

[0051] S3, again, pre-assemble the first ramp section 3 and the second ramp section 4, and weld and connect the hinge base and the shaft pin according to the above method; then, only spot weld and stick the locking hook pin and the limiting pad 1303;

[0052] S4, the actual ship installation stage of the movable ramp: the lower end of the third ramp section 5 is in contact with the deck 102, and the base of the roll-on / roll-off equipment and its hull position is installed and welded in sequence; then the first ramp section 3 and the paired hinge seat 2 are in place, and since the first ramp section 3, the second ramp section 4 and the wing plate 12 are previously connected as a whole and fit the third ramp section 5, the initial positioning of the locking hook pin and the thickness of the limit pad 1303 in this ramp posture can be checked;

[0053] S5, ramp power-on debugging stage: adjust the third ramp section 5 to other postures, check the locking hook pin and the limit pad 1303 again, measure the best size, and finally weld and paint after processing.

[0054] 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 movable ramp for a large-scale car roll-on / roll-off transport ship, installed on a hull structure (1), characterized in that: The invention comprises a first hinge seat (2), the first hinge seat (2) being arranged on the upper end surface of the hull structure (1), a first ramp section (3) being rotatably arranged on the first hinge seat (2), a second ramp section (4) being arranged at one end of the first ramp section (3) away from the first hinge seat (2), the first ramp section (3) being rotatably connected to the second ramp section (4) via a pin shaft, a third ramp section (5) being connected at one end of the second ramp section (4) away from the first ramp section (3), a second hinge seat (6) being arranged on the upper end surface of the hull structure (1) and located inside the first hinge seat (2), a hinge shaft (601) being arranged on the second hinge seat (6), and the second hinge seat (6) being rotatably connected to the end of the third ramp section (5) via the hinge shaft (601); A deck (102) is provided on one side of the hull structure (1), a mounting platform (101) is provided between the hull structure (1) and the deck (102), cylinder bases (7) are provided at both ends of the upper surface of the mounting platform (101), a cylinder lifting arm (8) is provided on the cylinder base (7), an end of the cylinder lifting arm (8) away from the cylinder base (7) is connected to the third ramp section (5), and support components (9) are provided on both sides of the upper surface of the deck (102); The support assembly (9) comprises a support rod (904), two of which are provided, and the two support rods (904) are rotatably provided on both sides of the lower end surface of the third ramp section (5).

2. The movable ramp for a large-scale car roll-on / roll-off transport ship according to claim 1 is characterized in that: A connecting assembly (13) is provided at one end of the second ramp section (4) away from the first ramp section (3), and the connecting assembly (13) comprises a locking hook pin and a limiting pad (1303), and the locking hook pin comprises two locking hooks (1301) and two locking pins (1302), and the two locking hooks (1301) are respectively fixedly arranged on both sides of the upper end surface of the third ramp section (5), and the two locking pins (1302) are respectively fixedly arranged on both sides of the second ramp section (4).

3. The movable ramp for a large-scale car roll-on / roll-off transport ship according to claim 2 is characterized in that: The limiting pad (1303) is arranged on the upper end surface of the third ramp section (5) close to the second ramp section (4), and the limiting pad (1303) is composed of a movable pad and a fixed pad located at the lower end of the movable pad. The upper end surface of the second ramp section (4) away from the first ramp section (3) is provided with a mounting groove, and a limiting axis is arranged in the mounting groove of the second ramp section (4). The second ramp section (4) is provided with a wing plate (12) through the limiting axis.

4. The movable ramp for a large-scale car roll-on / roll-off transport ship according to claim 1, characterized in that: The support assembly (9) further comprises a track seat (901), a slider (902) and an L-shaped limit block (903); the slider (902) is slidably arranged inside the track seat (901); the lower end of the support rod (904) is rotatably connected to the slider (902) via a connecting shaft; and a strip-shaped notch is provided on the side wall of the track seat (901).

5. The movable ramp for a large-scale car roll-on / roll-off transport ship according to claim 4, characterized in that: A convex strip is provided at the middle end of the slider (902) on the side away from the support rod (904); the convex strip of the slider (902) passes through the strip-shaped slot and is connected to the L-shaped limit block (903); a positioning pin (905) is provided on the L-shaped limit block (903); a through hole for the positioning pin (905) to pass through is provided at the center of the slider (902); and a plurality of positioning holes (906) are provided at equal distances on the track seat (901).

6. The movable ramp for a large-scale car roll-on / roll-off transport ship according to claim 1, characterized in that: The upper surface of the third ramp section (5) is provided with clamping grooves (501) on both sides, and fixing screws (502) are arranged in the clamping grooves (501). The third ramp section (5) is provided with a guardrail assembly (11) through the clamping grooves (501).

7. The movable ramp for a large-scale roll-on / roll-off automobile transport ship according to claim 6, characterized in that: The guardrail assembly (11) comprises a guardrail body (1101) and a clamping seat (1102); the clamping seat (1102) is clamped in a clamping groove (501) and fixed by a fixing screw (502); and the guardrail body (1101) is arranged on the upper end surface of the clamping seat (1102).

8. The movable ramp for a large-scale car roll-on / roll-off transport ship according to claim 1, characterized in that: A rubber pad (10) is provided at one end of the third ramp section (5) away from the second hinge seat (6).

9. The movable ramp for a large-scale car roll-on / roll-off transport ship according to claim 1, characterized in that: The upper surface of one end of the third ramp section (5) close to the rubber pad (10) is provided with receiving grooves (503) on both sides, and a wire rope hook (504) is arranged inside the receiving groove (503) via a limit pin.

10. The installation method of the movable ramp of a large-scale roll-on / roll-off automobile transport ship is characterized in that: The following steps are involved: S1. First, complete the main structure welding of each section to ensure that the specification size and welding deformation are controlled within the tolerance range; S2. Next, use a wire drawing or lighting method to locate and check the center line of the hinge shaft (601), and sequentially spot weld, adjust and weld the hinge seats at the ends of the first ramp section (3) and the third ramp section (5) for turning the ramp angle, and weld the wing plate (12) and the hinge between the second ramp section (4) and the third ramp section (5) to the second ramp section (4) and connected via a limit shaft; S3, again, pre-assemble the first ramp section (3) and the second ramp section (4), weld and connect the hinge base according to the above method, and connect the shaft pin; then, only spot weld and stick the locking hook pin and the limit pad (1303); S4, the stage of installation of the movable ramp on the actual ship: the lower end of the third ramp section (5) is in contact with the deck (102), and the base of the roll-on / roll-off equipment and the hull position is installed and welded in sequence; then the first ramp section (3) and the matched hinge seat No. 1 (2) are put in place, and since the first ramp section (3), the second ramp section (4) and the wing plate (12) are previously connected as a whole and fit the third ramp section (5), the initial positioning of the locking hook pin and the thickness of the limit pad (1303) in this ramp posture can be checked; S5, ramp power-on debugging stage: adjust the third ramp section (5) to other postures, check the locking hook pin and the limit pad (1303) again, measure the best size, and finally weld and paint after processing.

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