Self-balancing safety ladder for offshore operation platform

Abstract

The invention discloses a self-balancing offshore work platform safety ladder and a using method, the self-balancing offshore work platform safety ladder comprises a sliding seat horizontally arranged in a sliding mode, a connecting frame hinged to one end of the sliding seat, a pedal horizontally and rotatably connected to the connecting frame and a counterweight part hoisted at the bottom of the pedal, and a hoisting frame is installed at the top of the sliding seat; the top end of the lifting frame is connected with the movable end of the connecting frame through a lifting rope, and a horizontally-shaking buffering assembly is arranged between the connecting frame and the pedal. The stability of the safety ladder under complex sea conditions is remarkably improved through a self-balancing mechanism and a buffer assembly, the safety of personnel getting on and off a platform is ensured through real-time response and anti-skid design, and daily use and maintenance are facilitated through rapid installation and modular design.

Description

Technical Field

[0001] The invention relates to the technical field of safety ladders, in particular to a self-balancing safety ladder for an offshore operating platform. Background Art

[0002] At present, the safety ladders commonly used in offshore working platforms mainly include two types: fixed safety ladders and suspended safety ladders.

[0003] Fixed safety ladders are usually installed directly on the platform structure, with the advantages of simple structure and easy installation. The disadvantage is that they cannot be adjusted according to changes in sea conditions, and are prone to swaying in the case of large waves, increasing the risk of personnel going up and down the platform.

[0004] Suspended safety ladder: It is suspended on the platform by ropes or chains and can be adjusted to a certain extent according to the sea conditions. The disadvantages are that the suspension system is complicated, the maintenance cost is high, and it is still difficult to ensure stability under extreme weather conditions, which poses a safety hazard.

[0005] In addition, existing safety ladders are prone to tilting and sliding when encountering severe sea conditions such as strong winds and big waves, which poses a great safety risk to operators. In particular, when the platform shakes violently, traditional safety ladders cannot adjust their posture in time, which may cause injuries or even fall into the sea. Summary of the invention

[0006] The technical problem to be solved by the present invention is that a fixed safety ladder cannot adjust its posture in time when it is swayed by impact, and the risk factor is relatively high.

[0007] In order to solve the above technical problems, the technical solution adopted by the present invention is: a self-balancing offshore work platform safety ladder, including a sliding seat arranged for horizontal sliding, a connecting frame hinged to one end of the sliding seat, a pedal horizontally connected to the connecting frame, and a counterweight hoisted at the bottom of the pedal. A hoisting frame is installed on the top of the sliding seat, and the top of the hoisting frame is connected to the movable end of the connecting frame by a hoisting rope. A horizontal shaking buffer component is arranged between the connecting frame and the pedal.

[0008] Preferably, the buffer assembly includes lifting rods equidistantly arranged on the connecting frame, a support shaft horizontally fixed to the movable end of the lifting rod, and a support block fixedly sleeved on the support shaft. Both ends of the pedal are connected to the connecting frame, and the support block slides horizontally in the installation cavity at the end of the pedal, and a buffer unit is arranged in the installation cavity.

[0009] Preferably, the buffer unit includes a piston fixed to the movable end of the support shaft and an air pipe fixed to the bottom of the pedal, one end of the air pipe is connected to the installation cavity, and the outer wall of the piston is in contact with the inner wall of the installation cavity.

[0010] Preferably, a spring is arranged in the installation cavity, an annular protrusion is arranged on the end wall of the piston, one end of the spring is fixedly sleeved on the annular protrusion, and the other end is connected to the inner end wall of the installation cavity.

[0011] Preferably, the movable end of the frame is fixedly connected with an arc-shaped hook, and the sling is connected to the fixed end of the hook.

[0012] Preferably, ribs are provided on both sides of the fixed end of the connecting rod, the counterweight member includes a counterweight bar, the top of the counterweight bar is fixedly provided with ear plates, the ear plates are arranged on both sides of the counterweight bar, and the bottom end of the connecting rod is rotatably connected to the ear plates.

[0013] Preferably, the inner ring of the ear plate is provided with a bearing mounting seat, the outer ring of the bearing mounting seat is provided with a connecting groove, the counterweight bar is provided with an oil groove, and the connecting groove is connected in parallel to the oil groove.

[0014] Preferably, an oil tank is provided in the movable end of the counterweight bar, and the oil tank is communicated with the connecting groove.

[0015] Preferably, the cross-section of the slide rail is in an I-shape, the slider is in a door-shape, and the inner side of the bottom end of the slider is in contact with the side wall of the slide rail.

[0016] The method for using the self-balancing offshore work platform safety ladder includes the following steps: Step 1: The transport ship is equipped with a safety ladder, and the transport ship moves to one side of the working platform. The winding assembly unwinds the lifting rope, so that the top of the connecting frame rotates downward. After the top of the connecting frame rotates to the height of the working platform, the sliding seat is pushed to move along the slide rail, so that the connecting frame is overlapped on the guardrail of the working platform; Step 2: Move the sliding seat backward to drive the connecting frame to move, and further lower the connecting frame so that the hook is hung on the guardrail of the working platform to achieve the connection between the connecting frame and the working platform; Step 3: The staff enters the working platform through the pedal and holds the connecting frame by hand. The pedal keeps the lifting rod in a vertical state through the gravity of the counterweight bar, thereby maintaining the pedal in a horizontal state; Step 4: When the transport ship rises or falls relative to the work platform, pull the sliding seat back or push the sliding seat forward. During the movement of the sliding seat, the connecting frame is lowered synchronously when the sliding seat moves backward, and the connecting frame is lifted synchronously when the sliding seat moves forward, so as to maintain a stable connection of the connecting frame; Step 5: When shaking occurs between the transport ship and the work platform, the connecting frame swings laterally, and the impact is buffered by the buffer component to reduce the lateral swing amplitude of the pedal.

[0017] The present invention provides a self-balancing offshore work platform safety ladder and a method for using the same, which has the following beneficial effects: 1. The automatic balancing function of the safety ladder is realized through the design of the sliding seat, connecting frame and counterweight. Especially in complex sea conditions, the gravity of the counterweight bar can keep the hoisting rod in a vertical state at all times, thereby ensuring the level of the pedal, greatly improving the safety of personnel going up and down the platform.

[0018] 2. The piston, air pipe, spring and other components in the buffer assembly can effectively absorb lateral impact, reduce the swing amplitude of the pedal when it shakes, and further enhance the stability of the safety ladder.

[0019] 3. The safety ladder can move along the slide rail through the sliding seat to achieve flexible connection between the connecting frame and the guardrail of the working platform. Whether the transport ship rises or falls relative to the working platform, or there is a shake between the two, the forward and backward movement of the sliding seat can synchronously adjust the height and angle of the connecting frame to ensure that the safety ladder always maintains a stable connection.

[0020] 4. This design is not only suitable for fixed installation, but can also be adjusted to a certain extent according to the actual sea conditions to adapt to different usage environments, thereby improving the versatility and applicability of the safety ladder.

[0021] 5. When there is shaking between the transport ship and the work platform, the connecting frame can respond quickly and adjust its posture, and reduce the swing amplitude of the pedal through the buffer component, thus avoiding injuries or even falling into the sea caused by violent shaking of traditional safety ladders.

[0022] 6. The pedal surface is equipped with anti-slip texture, which increases the friction of the foot, prevents people from slipping, and further improves the safety of use.

[0023] 7. Each component is easy to disassemble and assemble, which is convenient for daily maintenance and overhaul, reducing the user's use cost and inconvenience; through the cooperation of hooks and hanging ropes, the safety ladder can be quickly installed and disassembled, reducing installation time and improving work efficiency. BRIEF DESCRIPTION OF THE DRAWINGS

[0024] The present invention will be further described below in conjunction with the accompanying drawings and embodiments: Figure 1 It is a schematic structural diagram of an embodiment of the present invention.

[0025] Figure 2 Schematic diagram of the structure of the pedal in the embodiment of the present invention.

[0026] Figure 3 Schematic diagram of the internal structure of the pedal in an embodiment of the present invention.

[0027] Figure 4 It is a cross-sectional view of the slide rail in an embodiment of the present invention.

[0028] Figure 5 Schematic diagram of the internal structure of the counterweight bar in an embodiment of the present invention.

[0029] In the figure: 1. slide rail; 2. sliding seat; 3. slider; 4. connecting frame; 5. lifting frame; 6. fixed pulley; 7. lifting rope; 8. hook; 9. winding assembly; 10. lifting rod; 11. pedal; 12. connecting rod; 13. counterweight bar; 14. supporting shaft; 15. piston; 16. mounting cavity; 17. spring; 18. air pipe; 19. ear plate; 20. oil tank; 21. oil tank; 22. connecting groove. DETAILED DESCRIPTION

[0030] like Figure 1-5 As shown, the present invention provides a self-balancing safety ladder for an offshore work platform, comprising a sliding seat 2 arranged for horizontal sliding, a connecting frame 4 hinged to one end of the sliding seat 2, a pedal 11 horizontally rotatably connected to the connecting frame 4, and a counterweight hoisted at the bottom of the pedal 11, a hanging frame 5 is installed on the top of the sliding seat 2, the top end of the hanging frame 5 is connected to the movable end of the connecting frame 4 through a hanging rope 7, and a horizontal shaking buffer component is arranged between the connecting frame 4 and the pedal 11.

[0031] A bottom plate is provided at the bottom of the slide rail 1, which is connected to the transport ship by bolts, and limit plates are provided at both ends of the slide rail 1 to prevent the slider 3 from falling off the slide rail 1. Three sliders 3 are installed on both sides of the bottom of the sliding seat 2 to achieve sliding support for the sliding seat 2.

[0032] A connecting frame 4 is hinged on both sides of the sliding seat 2. The connecting frame 4 includes a rod section in the middle, and guardrail vertical rods are equidistantly arranged on the top of the rod end. The guardrail vertical rods are connected to the guardrail crossbars to form a guardrail structure. A hanging rod 10 is fixedly installed at the bottom of the connecting frame 4, and the end of the pedal 11 is rotatably connected to the bottom end of the hanging rod 10 through a pin shaft.

[0033] A connecting rod 12 is vertically fixedly connected to the middle of the bottom surface of the pedal 11. The connecting rod 12 is used to rotate and connect the counterweight. The counterweight is subjected to the downward gravity, thereby ensuring that the connecting rod 12 maintains a vertical state under the vertical downward pulling force, thereby ensuring that the pedal 11 above the connecting rod 12 is in a horizontal state. When the connecting frame 4 is at any angle, the pedal 11 is guaranteed to be in a horizontal state to achieve self-balancing of the pedal 11.

[0034] The connecting frame 4 realizes rotation by unwinding and rewinding the sling rope 8 through the unwinding component 9. When unwinding the sling rope 8, the connecting frame 4 rotates clockwise, and when rewinding, the connecting frame 4 rotates counterclockwise. The unwinding and rewinding action of the unwinding component 9 is controlled by a distance meter on the transport ship. The distance meter is used to detect the horizontal and vertical distances between the deck of the transport ship and the working platform, and controls the action of the unwinding component 9 and the sliding seat 3 according to the detected data.

[0035] like Figure 2 and Figure 3The buffer assembly includes a hoisting rod 10 equidistantly arranged on the connecting frame 4, a support shaft 14 horizontally fixed to the movable end of the hoisting rod 10, and a support block fixedly sleeved on the support shaft 14. Both ends of the pedal 11 are connected to the connecting frame 4. The support block slides horizontally in the installation cavity 16 at the end of the pedal 11. The installation cavity 16 is provided with a buffer unit.

[0036] By installing the support shaft 14 on the hanging rod 10 , the support block on the support shaft 14 is annular, and the support block cooperates with the installation cavity 16 to realize the rotation installation of the pedal 11 ; and provide space for the pedal 11 to move horizontally.

[0037] like Figure 3 As shown. The buffer unit includes a piston 15 fixed to the movable end of the support shaft 14 and an air pipe 18 fixed to the bottom of the pedal 11. One end of the air pipe 18 is connected to the installation cavity 16, and the outer wall of the piston 15 fits with the inner wall of the installation cavity 16. When the connecting frame 4 shakes laterally, the connecting frame 4 on one side drives the support shaft 14 to slide into the installation cavity 16, and the connecting frame 4 on the other side drives the support shaft 14 to move to the outside of the installation cavity 16. During the movement, the piston 15 compresses the air in the installation cavity 16 and squeezes the air out of the air pipe 18. The piston 15 on the other side inhales air through the air pipe 18, and buffering is achieved by converting part of the kinetic energy of the impact into the internal energy of the air.

[0038] like Figure 3 As shown. A spring 17 is arranged in the installation cavity 16, and an annular protrusion is arranged on the end wall of the piston 15. One end of the spring 17 is fixedly sleeved on the annular protrusion, and the other end is connected to the inner end wall of the installation cavity 16. By arranging the spring 17, the spring 17 is mainly used to restore the pedal 11 in the form of elastic force after the pedal 11 is shaken and displaced, and during the impact process, part of the kinetic energy will be used to compress the spring 17 to reduce the swing amplitude of the pedal 11.

[0039] like Figure 1 As shown, in order to improve the stability of the connection between the frame 4 and the working platform, the movable end of the frame 4 is fixedly connected with an arc-shaped hook 8, and the suspension rope 7 is connected to the fixed end of the hook 8.

[0040] like Figure 2 , Figure 3 and Figure 5 The connecting rod 12 is provided with ribs on both sides of the fixed end, the counterweight comprises a counterweight bar 13, the top of the counterweight bar 13 is fixedly provided with ear plates 19, the ear plates 19 are arranged on both sides of the counterweight bar 13, and the bottom end of the connecting rod 12 is rotatably connected to the ear plates 19.

[0041] The ribs are used to improve the stability of the connecting rod 12. By setting the counterweight bar 13, a parallelogram structure is formed. Under the action of gravity, the connecting rod 12 is pulled down by the counterweight bar 13 to maintain the horizontal state of the pedal 11. The top surface of the pedal 11 is also arranged with friction patterns for anti-slip.

[0042] like Figure 5 The inner ring of the ear plate 19 is provided with a bearing mounting seat, the outer ring of the bearing mounting seat is provided with a connecting groove 22, the counterweight bar 13 is provided with an oil groove 20, and the connecting groove 22 is connected in parallel to the oil groove 20. During the process of the continuous change of the angle of the connecting frame 4, the relative rotation between the ear plate 19 and the connecting rod 12 is supplemented with lubricating oil through the oil groove 20 to ensure smooth rotation.

[0043] like Figure 5 The movable end of the counterweight bar 13 is provided with an oil tank 21, which is connected to the connecting groove 22. The connecting groove 22 is used for oiling, and the lubricating oil is replenished through the branch groove connected in parallel with the connecting groove 22.

[0044] like Figure 4 As shown, in order to ensure the safety of the operation of the sliding seat 2, the cross section of the slide rail 1 is in an I-shape, the slider 3 is in a door shape, and the inner side of the bottom end of the slider 3 is in contact with the side wall of the slide rail 1.

[0045] A method for using a self-balancing offshore work platform safety ladder comprises the following steps: Step 1: The transport ship is equipped with a safety ladder, and the transport ship moves to one side of the working platform. The winding assembly 9 unwinds the lifting rope 7, so that the top of the connecting frame 4 rotates downward. After the top of the connecting frame 4 rotates to the height of the working platform, the sliding seat 2 is pushed to move along the slide rail 1, so that the connecting frame 4 is overlapped on the guardrail of the working platform; Step 2: Move the sliding seat 2 backward to drive the connecting frame 4 to move, and further lower the connecting frame 4 so that the hook 8 is hung on the guardrail of the working platform to achieve the connection between the connecting frame 4 and the working platform; Step 3: The staff enters the working platform through the pedal 11 and holds the connecting frame 4 by hand. The pedal 11 keeps the hoisting rod 10 in a vertical state through the gravity of the counterweight bar 13, thereby maintaining the pedal 11 in a horizontal state; Step 4: When the transport ship rises or falls relative to the work platform, the sliding seat 2 is pulled back or pushed forward. During the movement of the sliding seat 2, the connecting frame 4 is lowered when the sliding seat 2 moves backward, and the connecting frame 4 is lifted when the sliding seat 2 moves forward, so as to maintain the stable connection of the connecting frame 4. Step 5: When shaking occurs between the transport ship and the work platform, the connecting frame 4 swings laterally, and the impact is buffered by the buffer assembly to reduce the lateral swing amplitude of the pedal 11.

Claims

1. A self-balancing safety ladder for offshore work platforms, characterized in that: The invention comprises a sliding seat (2) arranged for horizontal sliding, a connecting frame (4) hinged to one end of the sliding seat (2), a pedal (11) connected to the connecting frame (4) for horizontal rotation, and a counterweight suspended at the bottom of the pedal (11); a hanging frame (5) is installed on the top of the sliding seat (2); the top of the hanging frame (5) is connected to the movable end of the connecting frame (4) through a hanging rope (7); and a buffer component for horizontal shaking is arranged between the connecting frame (4) and the pedal (11).

2. The self-balancing offshore work platform safety ladder according to claim 1, characterized in that: The buffer assembly comprises hanging rods (10) equidistantly arranged on the connecting frame (4), a support shaft (14) horizontally fixed to the movable end of the hanging rod (10), and a support block fixedly sleeved on the support shaft (14); both ends of the pedal (11) are connected to the connecting frame (4); the support block slides horizontally in a mounting cavity (16) at the end of the pedal (11); and a buffer unit is arranged in the mounting cavity (16).

3. The self-balancing offshore work platform safety ladder as claimed in claim 2, characterized in that: The buffer unit comprises a piston (15) fixed to the movable end of the support shaft (14) and an air pipe (18) fixed to the bottom of the pedal (11); one end of the air pipe (18) is connected to the installation cavity (16); and the outer wall of the piston (15) is in contact with the inner wall of the installation cavity (16).

4. The self-balancing offshore work platform safety ladder as claimed in claim 3, characterized in that: A spring (17) is arranged in the installation cavity (16), an annular protrusion is arranged on the end wall of the piston (15), one end of the spring (17) is fixedly sleeved on the annular protrusion, and the other end is connected to the inner end wall of the installation cavity (16).

5. The self-balancing offshore work platform safety ladder according to claim 1, characterized in that: The movable end of the frame (4) is fixedly connected with an arc-shaped hook (8), and the suspension rope (7) is connected to the fixed end of the hook (8).

6. The self-balancing offshore work platform safety ladder according to claim 1, characterized in that: Ribs are provided on both sides of the fixed end of the connecting rod (12); the counterweight member comprises a counterweight bar (13); a lug plate (19) is fixedly provided on the top of the counterweight bar (13); the lug plates (19) are arranged on both sides of the counterweight bar (13); and the bottom end of the connecting rod (12) is rotatably connected to the lug plate (19).

7. The self-balancing offshore work platform safety ladder according to claim 6, characterized in that: The inner ring of the ear plate (19) is provided with a bearing mounting seat, the outer ring of the bearing mounting seat is provided with a connecting groove (22), the counterweight bar (13) is provided with an oil groove (20), and the connecting groove (22) is connected in parallel to the oil groove (20).

8. The self-balancing offshore work platform safety ladder according to claim 7, characterized in that: An oil tank (21) is disposed in the movable end of the counterweight bar (13), and the oil tank (21) is in communication with the connecting groove (22).

9. The self-balancing offshore work platform safety ladder according to claim 1, characterized in that: The cross-section of the slide rail (1) is in an I-shape, the slider (3) is in a door-shape, and the inner side of the bottom end of the slider (3) is in contact with the side wall of the slide rail (1).

10. The method for using the self-balancing offshore work platform safety ladder according to any one of claims 1 to 9, characterized in that: The steps include: Step 1: The transport ship is equipped with a safety ladder, and the transport ship moves to one side of the working platform. The lifting rope (7) is unwound through the winding assembly (9), so that the top of the connecting frame (4) rotates downward. After the top of the connecting frame (4) rotates to the height of the working platform, the sliding seat (2) is pushed to move along the sliding rail (1), so that the connecting frame (4) is overlapped on the guardrail of the working platform; Step 2: Move the sliding seat (2) backward to drive the connecting frame (4) to move, and further lower the connecting frame (4) so ​​that the hook (8) is hung on the guardrail of the working platform, thereby realizing the connection between the connecting frame (4) and the working platform; Step 3: The worker enters the working platform through the pedal (11) and holds the connecting frame (4) by hand. The pedal (11) keeps the hoisting rod (10) in a vertical state through the gravity of the counterweight bar (13), thereby maintaining the pedal (11) in a horizontal state; Step 4: When the transport ship rises or falls relative to the work platform, the sliding seat (2) is pulled back or pushed forward. During the movement of the sliding seat (2), the connecting frame (4) is lowered synchronously when the sliding seat (2) moves backward, and the connecting frame (4) is lifted synchronously when the sliding seat (2) moves forward, so as to maintain a stable connection of the connecting frame (4); Step 5: When shaking occurs between the transport ship and the work platform, the connecting frame (4) swings laterally, and the impact is buffered by the buffer component, thereby reducing the lateral swing amplitude of the pedal (11).

Images