Treadle structure in air duct of roll-on-roll-off ship

Abstract

The invention discloses a stepping structure in a roll-on-roll-off ship air duct, belongs to the technical field of roll-on-roll-off ship internal devices, and aims at solving the problem that in the prior art, climbing is not prone to occurring in the roll-on-roll-off ship air duct. The inserting plates can be inserted step by step during ascending and provide stable support; through the arrangement of an insertion plate hinge point and a baffle in the storage part, it is ensured that an insertion plate cannot retract during bearing; a steel rope and a clamping block in the descending module are combined, and the clamping force is adjusted through a screw sliding block mechanism, so that personnel can control the descending speed; grooves are formed in the end parts of the clamping blocks, so that the clamping effect on the steel rope is enhanced; the pedal is designed to be of a double-face bandage structure, and the pedal requirement after the storage component rotates is met; the limiting groove is in sliding fit with the fixing rod, and it is guaranteed that the whole mechanism stably moves in the axial direction of the air duct. The structure integrates climbing and descending functions in a limited space, and has both stability and operability.

Description

Technical Field

[0001] This invention belongs to the technical field of internal devices for roll-on / roll-off ships, and specifically relates to a step structure inside the ventilation duct of a roll-on / roll-off ship. Background Technology

[0002] The ventilation ducts inside roll-on / roll-off (Ro-Ro) ships are typically narrow, vertically or inclined passageways used for ventilation or ductwork. Due to their structural characteristics, the interiors of these ducts are often smooth, steep, and lack fixed support points, posing significant difficulties for personnel involved in maintenance and cleaning. Current technologies often employ simple ladders or welded steps within the ducts, but these methods not only occupy space and affect ventilation efficiency, but also fail to provide safe and efficient upward and downward support, especially in emergencies when personnel need to quickly enter or evacuate the ducts. Furthermore, the vibrations and swaying of Ro-Ro ships during navigation further increase the risks of climbing within the ducts. Therefore, there is an urgent need for a specialized step structure that ensures safe personnel access without affecting the normal function of the ventilation ducts, while also providing upward support and downward control capabilities.

[0003] This invention aims to alleviate or at least mitigate the problems or defects of difficulty in climbing or descending within the air ducts of roll-on / roll-off ships by providing a step structure within the air ducts of roll-on / roll-off ships. Summary of the Invention

[0004] In view of the above-mentioned defects or improvement needs of the prior art, the present invention provides a step structure inside the air duct of a roll-on / roll-off ship, which has the advantage of being easy to climb.

[0005] To achieve the above objectives, the present invention provides a step structure inside the ventilation duct of a roll-on / roll-off ship, including a ventilation duct, the ventilation duct having a duct wall, and further comprising... A climbing module includes a slide rail formed along the axial direction of the air duct in the wall of the air duct, and a lateral slot is formed on the side wall of the slide rail; A descent module, comprising a steel cable disposed outside the slide and arranged along the slide; The force-bearing module includes a sliding mechanism disposed in the slide rail. The sliding mechanism includes an insert plate that can be inserted into the lateral slot when rising. A mirror-arranged clamping block is provided on the outside of the sliding mechanism. The clamping block can clamp the steel rope when descending. A foot pedal or pull ring is provided on the outside of the sliding mechanism.

[0006] As a further improvement of the present invention, the sliding mechanism further includes a storage component, which includes a first circular plate and a second circular plate that are concentrically arranged and of the same size. A baffle is fixed between the first circular plate and the second circular plate. A first insert plate and a second insert plate that are mirror-arranged are also provided between the first circular plate and the second circular plate. The ends of the first insert plate and the second insert plate are hinged to form an insert plate hinge point. The sides of the first insert plate and the second insert plate are connected by an insert plate elastic member. When the first insert plate and the second insert plate are flipped upward, they can touch the baffle.

[0007] As a further improvement of the present invention, the hinge point of the insert plate is located at a radius of 2 / 3-3 / 4 from the center of the first circular plate or the second circular plate, and the lengths of the first insert plate and the second insert plate are both 5 / 6-7 / 8 of the diameter of the first circular plate or the second circular plate.

[0008] As a further improvement of the present invention, a limiting groove is opened in the wall of the air duct, the limiting groove is located on the side of the slide, a fixed rod is slidably provided in the limiting groove, a rotating point is provided in the fixed rod, and the middle part of the clamping block is hinged to the rotating point. Each clamping block is provided with a telescopic block at its rear end. The telescopic block and the clamping block are telescopically connected. The ends of the telescopic blocks are hinged to form the clamping block hinge points. A pivot is inserted through the foot pedal or pull ring, and a screw is provided at the front end of the pivot. A threaded slider is fitted on the screw. The clamping block hinge point is located on the slider. When the rotating shaft rotates, the slider can drive the clamping block hinge point to move back and forth, and the clamping block can clamp or separate accordingly.

[0009] As a further improvement of the present invention, the fixed rod is provided with a slider limiting plate, the slider limiting plate being the same width as the slider, and the slider being able to slide against the inner wall of the slider limiting plate.

[0010] As a further improvement of the present invention, two sets of clamping blocks are provided on the upper and lower surfaces, and the clamping block hinge points are respectively provided on the upper and lower surfaces of the slider.

[0011] As a further improvement of the present invention, the foot pedal includes a pedal, the pivot is inserted through the pedal, and the upper and lower surfaces of the pedal are respectively provided with a first strap and a second strap, the first strap or the second strap both surround the pedal to form a stepping area.

[0012] As a further improvement of the present invention, each of the clamping blocks has a groove at its end, and the two grooves are arranged opposite to each other. When the clamping blocks are closed, the grooves can clamp the steel rope.

[0013] As a further improvement of the present invention, the end of the fixed rod is provided with a limiting slider, which matches the limiting groove.

[0014] In summary, the beneficial effects of the above-described technical solutions conceived by this invention compared with the prior art include: This invention discloses a step structure within a roll-on / roll-off (Ro-Ro) ship ventilation duct. Through the cooperation of slide rails and lateral slots, insert plates are inserted step-by-step during ascent, providing stable support and preventing slippage or detachment during climbing. The hinge points and baffles in the storage components ensure that the insert plates do not overturn under load, improving climbing safety. The combination of steel cables and clamping blocks in the descent module, achieved through a screw-slider mechanism, allows for adjustable clamping force, enabling personnel to control the descent speed and reducing the risk of falls. Grooves and anti-slip textures at the ends of the clamping blocks enhance the gripping effect on the steel cables. The foot pedals are designed with double-sided straps to accommodate the need for stepping after the storage components have rotated, improving operational adaptability. The sliding cooperation between the limiting groove and the fixing rod ensures smooth movement of the entire mechanism along the duct's axial direction, preventing swaying. This structure integrates climbing and descent functions within a limited space, balancing stability and operability, and is suitable for various operational scenarios within Ro-Ro ship ventilation ducts. Attached Figure Description

[0015] Figure 1 This is a schematic diagram of a step structure inside the ventilation duct of a roll-on / roll-off ship according to the present invention; Figure 2 For the present invention Figure 1 Schematic diagram of the structure at point A in the middle; Figure 3 For the present invention Figure 1 Schematic diagram of the structure at point C; Figure 4 This is a schematic diagram of the fixing rod structure of the present invention; Figure 5 For the present invention Figure 4 Schematic diagram of the structure at point B; Figure 6 This is a schematic diagram of the structure of the storage component of the present invention; Figure 7 This is a schematic diagram of the internal structure of the storage component of the present invention; Figure 8 This is a schematic diagram of the connection structure between the pull ring and the storage component of the present invention; Figure 9 This is a schematic diagram of the foot pedal structure of the present invention.

[0016] In all the accompanying drawings, the same reference numerals denote the same technical features, specifically: 1. Duct wall; 2. Slide track; 3. Steel rope fixing point; 4. Sliding mechanism; 5. Limiting groove; Lateral slot 21; steel rope 31; storage component 41; first circular plate 411; second circular plate 412; First insert plate 413; Second insert plate 414; Insert plate elastic element 415; Insert plate hinge point 416; Baffle 417. Clamping block 42; telescopic block 421; groove 422; clamping block hinge point 423; fixing rod 43; Limiting slider 431; Rotation point 432; Slider limiting plate 433; Foot pedal 44; Pedal 441; First strap 442; Second strap 443; Rotating shaft 45; Screw 451; Slider 452; Pull ring 46. Detailed Implementation

[0017] The technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0018] The terminology used herein is for the purpose of describing particular embodiments only and is not intended to limit the invention. The terms “comprising,” “including,” etc., as used herein indicate the presence of the stated features, steps, operations, and / or components, but do not exclude the presence or addition of one or more other features, steps, operations, or components.

[0019] All terms used herein (including technical and scientific terms) have the meanings commonly understood by those skilled in the art, unless otherwise defined. It should be noted that the terms used herein are to be interpreted in a manner consistent with the context of this specification, and not in an idealized or overly rigid way.

[0020] In the embodiments, by Figure 1-9 Provided is a step structure inside the ventilation duct of a roll-on / roll-off ship, including a ventilation duct, the ventilation duct having a ventilation duct wall 1, and further comprising... The climbing module includes a slide 2 formed along the axial direction of the air duct in the wall 1 of the air duct, and a lateral groove 21 is formed on the side wall of the slide 2; A descent module includes a steel cable 31 disposed outside the slide 2 and arranged along the slide 2; The force-bearing module includes a sliding mechanism 4 disposed in the slide rail 2. The sliding mechanism 4 includes an insert plate that can be inserted into the lateral slot 21 when rising. A mirror-mounted clamping block 42 is provided on the outside of the sliding mechanism 4. The clamping block 42 can clamp the steel rope 31 when descending. A foot pedal 44 or a pull ring 46 is provided on the outside of the sliding mechanism 4.

[0021] The climbing module and the descending module are considered as a cooperating mechanism. Two sets of climbing and descending modules are arranged left and right. Each climbing module has two force-bearing modules, one vertically and one vertically. The upper force-bearing module has a pull ring 46 on its rear side, and the lower force-bearing module has a foot pedal 44 on its rear side. When the operator needs to climb inside the air duct, they pull the pull ring 46 and step on the foot pedal 44. At this time, the insert plates in each force-bearing module insert into the slots 21 to ensure that they provide upward support.

[0022] When the operator needs to descend, the clamp 42 clamps the steel rope 31, using the friction between the two to counteract most of the operator's weight, allowing him to descend slowly.

[0023] In a preferred embodiment of the present invention, the sliding mechanism 4 further includes a storage component 41, which includes a first circular plate 411 and a second circular plate 412 that are concentrically arranged and of the same size. A baffle 417 is fixed between the first circular plate 411 and the second circular plate 412. An insert plate is also provided between the first circular plate 411 and the second circular plate 412, which includes a first insert plate 413 and a second insert plate 414 that are mirror images of each other. The ends of the first insert plate 413 and the second insert plate 414 are hinged to form an insert plate hinge point 416. The sides of the first insert plate 413 and the second insert plate 414 are connected by an insert plate elastic member 415. When the first insert plate 413 and the second insert plate 414 are flipped upward, they can touch the baffle 417.

[0024] The slide 2 has multiple lateral slots 21 on both sides, all of which are inclined downwards. The first insert plate 413 and the second insert plate 414 can be inserted into the lateral slots 21 on both sides of the slide 2. The baffle 417 provides downward support for the first insert plate 413 and the second insert plate 414 to prevent them from flipping upwards, thus ensuring stability after insertion. When climbing upwards, the sliding mechanism 4 is lifted upwards, and the first insert plate 413 and the second insert plate 414 can be pulled out from their respective lateral slots 21. After being lifted to a suitable position and stepped down, the first insert plate 413 and the second insert plate 414 open again due to the elastic force of the elastic element 415 between them and insert into the higher lateral slots 21 for support. Because the first insert plate 413 and the second insert plate 414 are inclined downwards, they will be blocked by the side walls of the slide 2 and retract towards each other when lifted upwards, which does not affect their upward movement. The length of the side slot 21 is set to 1-2cm. If the length is too short, the support will be unstable after the first insert plate 413 and the second insert plate 414 are inserted; if the length is too long, it will be inconvenient to pull out the first insert plate 413 and the second insert plate 414.

[0025] As a preferred embodiment of the present invention, a limiting groove 5 is provided in the air duct wall 1, the limiting groove 5 is located on the side of the slide 2, a fixing rod 43 is slidably provided in the limiting groove 5, a rotation point 432 is provided in the fixing rod 43, and the middle part of the clamping block 42 is hinged to the rotation point 432. Each clamping block 42 is provided with a telescopic block 421 at its rear end. The telescopic block 421 and the clamping block 42 are telescopically connected. The ends of the telescopic block 421 are hinged to form clamping block hinge points 423. A rotating shaft 45 is inserted through the foot pedal 44 or the pull ring 46. A screw 451 is provided at the front end of the rotating shaft 45, and a threaded slider 452 is fitted on the screw 451. The clamping block hinge point 423 is disposed on the slider 452. When the rotating shaft 45 rotates, the slider 452 can drive the clamping block hinge point 423 to move back and forth, and the clamping block 42 can clamp or separate accordingly.

[0026] When it is necessary to descend, rotate the entire storage component 41 180° so that the first insert plate 413 and the second insert plate 414 tilt upwards to prevent them from inserting into the lateral slot 21 during descent. At this time, the storage component 41 can fall downwards, and its falling speed is controlled by the force of the clamping block 42 clamping the steel rope 31.

[0027] When the foot pedal 44 or pull ring 46 rotates, it drives the rotating shaft 45 and screw 451 to rotate. At this time, the slider 452 on the screw 451 can move back and forth, thereby driving the clamping block hinge point 423 to move back and forth. When the clamping block hinge point 423 moves backward, the telescopic block 421 is stretched, the included angle between the clamping blocks 42 becomes smaller, and the ends of the clamping blocks 42 move closer together to clamp the steel rope 31. To release the clamp, simply rotate the corresponding foot pedal 44 or pull ring 46 in the opposite direction. Here, the width and pitch of the screw 451 are set within a suitable range to ensure that after the entire storage component 41 rotates 180°, the slider 452 can slide so that the clamping blocks 42 just clamp the steel rope 31. Afterward, the operator can rotate the foot pedal 44 slightly according to their own weight to adjust the friction and control the descent speed.

[0028] In a preferred embodiment of the present invention, the hinge point 416 of the insert plate is located at a radius of 2 / 3 to 3 / 4 of the radius from the center of the first circular plate 411 or the second circular plate 412, and the lengths of the first insert plate 413 and the second insert plate 414 are both 5 / 6 to 7 / 8 of the diameter of the first circular plate 411 or the second circular plate 412. By setting appropriate lengths for the first insert plate 413 and the second insert plate 414 and the position of the hinge point 416, the first insert plate 413 and the second insert plate 414 can be completely housed within the area covered by the first circular plate 411 and the second circular plate 412 after being combined.

[0029] In a preferred embodiment of the present invention, the fixing rod 43 is provided with a slider limiting plate 433, the slider limiting plate 433 being the same width as the slider 452, and the slider 452 being able to slide against the inner wall of the slider limiting plate 433. By placing the slider 452 within the slider limiting plate 433, it is ensured that the slider 452 itself will not rotate.

[0030] In a preferred embodiment of the present invention, two sets of clamping blocks 42 are provided vertically, with their clamping block hinge points 423 respectively located on the upper and lower surfaces of the slider 452. The two sets of clamping blocks 42 enhance the clamping force and ensure stability.

[0031] In a preferred embodiment of the present invention, the foot pedal 44 includes a pedal 441, and the rotating shaft 45 passes through the pedal 441. The upper and lower surfaces of the pedal 441 are respectively provided with a first strap 442 and a second strap 443, which surround the pedal 441 to form a stepping area. The foot pedal 44 is designed to be usable on both sides, allowing it to be stepped on even after rotating 180°.

[0032] In a preferred embodiment of the present invention, each end of the clamping block 42 has a groove 422, and the two grooves 422 are arranged opposite to each other. When the clamping block 42 is closed, the groove 422 can clamp the steel rope 31. The groove 422 may also be provided with concave and convex textures, and the groove 422 is provided to fit the steel rope 31 for easy clamping.

[0033] In a preferred embodiment of the present invention, the end of the fixing rod 43 is provided with a limiting slider 431, which matches the limiting groove 5. This specifies one method in which the fixing rod 43 can be slidably configured.

[0034] Working principle: During climbing, the operator supports their body weight via the pull ring 46 and foot pedal 44. The sliding mechanism 4 moves upward along the slide 2. The first insert plate 413 and the second insert plate 414 in the storage component 41 unfold outward under the action of the insert plate elastic element 415 and insert into the lateral slot 21 on the side wall of the slide 2, thereby providing a stable climbing foothold. During descent, the storage component 41 is rotated 180 degrees to disengage the insert plates from the lateral slot 21. At this time, rotating the foot pedal 44 or the pull ring 46 drives the rotating shaft 45 to rotate, causing the slider 452 on the screw 451 to move back and forth. This, in turn, drives the clamping block 42 to retract around the rotation point 432 via the telescopic block 421. The groove 422 at the end of the clamping block 42 clamps the steel rope 31, achieving a controllable slow descent through friction.

[0035] In summary, the step structure within the air duct of a roll-on / roll-off ship of this invention, through the cooperation of slide rails and lateral slots, allows the insert plates to be inserted step by step during ascent, providing stable support and preventing slippage or detachment during climbing. The hinge points and baffles in the storage components ensure that the insert plates do not overturn under load, improving climbing safety. The combination of steel rope and clamping blocks in the descent module, through a screw-slider mechanism, allows for adjustment of the clamping force, enabling personnel to control the descent speed and reducing the risk of falls. Grooves and anti-slip textures at the ends of the clamping blocks enhance the gripping effect on the steel rope. The foot pedals are designed with double-sided straps to accommodate the need for stepping after the storage components have rotated, improving operational adaptability. The sliding cooperation between the limiting groove and the fixing rod ensures smooth movement of the entire mechanism along the air duct axis, preventing swaying. This structure integrates climbing and descent functions within a limited space, balancing stability and operability, and is suitable for various operating scenarios within the air ducts of roll-on / roll-off ships.

[0036] Although embodiments of the invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of the invention, the scope of which is defined by the appended claims and their equivalents.

Claims

1. A step structure inside a wind tunnel of a roll-on / roll-off ship, comprising a wind tunnel having a wind tunnel wall (1), characterized in that, include The climbing module includes a slide (2) opened in the wall (1) of the air duct along the axial direction of the air duct, and a lateral slot (21) is opened on the side wall of the slide (2). The descent module includes a steel cable (31) disposed outside the slide (2) and arranged along the slide (2); The force-bearing module includes a sliding mechanism (4) disposed in the slide (2). The sliding mechanism (4) includes a plate that can be inserted into the lateral slot (21) when rising. A clamping block (42) is provided on the outside of the sliding mechanism (4) and can clamp the steel rope (31) when falling. A foot pedal (44) or a pull ring (46) is provided on the outside of the sliding mechanism (4).

2. The step structure according to claim 1, characterized in that, The sliding mechanism (4) further includes a storage component (41), which includes a first circular plate (411) and a second circular plate (412) that are concentrically arranged and of the same size. A baffle (417) is fixed between the first circular plate (411) and the second circular plate (412). A first insert plate (413) and a second insert plate (414) that are mirror-arranged are also provided between the first circular plate (411) and the second circular plate (412). The ends of the first insert plate (413) and the second insert plate (414) are hinged to form an insert plate hinge point (416). The sides of the first insert plate (413) and the second insert plate (414) are connected by an insert plate elastic member (415). When the first insert plate (413) and the second insert plate (414) are flipped upward, they can touch the baffle (417).

3. The step structure according to claim 2, characterized in that, The hinge point (416) of the insert plate is located at a radius of 2 / 3 to 3 / 4 of the center of the first circular plate (411) or the second circular plate (412). The lengths of the first insert plate (413) and the second insert plate (414) are both 5 / 6 to 7 / 8 of the diameter of the first circular plate (411) or the second circular plate (412).

4. The step structure according to claim 1, characterized in that, The air duct wall (1) has a limiting groove (5) located on the side of the slide (2). A fixing rod (43) is slidably provided in the limiting groove (5). A rotating point (432) is provided in the fixing rod (43). The middle part of the clamping block (42) is hinged to the rotating point (432). Each clamping block (42) is provided with a telescopic block (421) at its rear end. The telescopic block (421) and the clamping block (42) are telescopically connected. The ends of the telescopic block (421) are hinged to form a clamping block hinge point (423). A pivot (45) is provided in the foot pedal (44) or pull ring (46), and a screw (451) is provided at the front end of the pivot (45), and a threaded slider (452) is fitted on the screw (451). The clamping block hinge point (423) is located on the slider (452). When the rotating shaft (45) rotates, the slider (452) can drive the clamping block hinge point (423) to move back and forth, and the clamping block (42) can clamp or separate accordingly.

5. The step structure according to claim 4, characterized in that, The fixed rod (43) is provided with a slider limiting plate (433), the slider limiting plate (433) is the same width as the slider (452), and the slider (452) can slide against the inner wall of the slider limiting plate (433).

6. The step structure according to claim 5, characterized in that, The clamping blocks (42) are arranged in two sets, and their clamping block hinge points (423) are respectively located on the upper and lower surfaces of the slider (452).

7. The step structure according to claim 4, characterized in that, The foot pedal (44) includes a pedal (441), and the pivot (45) passes through the pedal (441). The upper and lower surfaces of the pedal (441) are respectively provided with a first strap (442) and a second strap (443). The first strap (442) or the second strap (443) surrounds the pedal (441) to form a stepping area.

8. The step structure according to claim 1, characterized in that, The clamping blocks (42) each have a groove (422) at their ends. The two grooves (422) are arranged opposite to each other. When the clamping blocks (42) are closed, the grooves (422) can clamp the steel rope (31).

9. The step structure according to claim 4, characterized in that, The fixed rod (43) is provided with a limiting slider (431) at its end, and the limiting slider (431) matches the limiting groove (5).

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