Transverse sliding type crawling ladder and ship cargo hold checking and cleaning method

Abstract

The invention discloses a transverse sliding type crawling ladder and a ship cargo hold checking and cleaning method, and belongs to the technical field of ship cargo hold maintenance equipment.The transverse sliding type crawling ladder comprises two vertically-arranged supporting frames and a plurality of treading frames transversely connected between the two supporting frames; sliding seats capable of sliding up and down in the height direction of the supporting frames are installed on the rear sides of the two supporting frames at the same time, variable pulley assemblies are fixed to the rear sides of the top ends of the supporting frames and the rear sides of the sliding seats, and the variable pulley assemblies enable the whole transverse sliding type crawling ladder to transversely slide. The variable pulley assembly has a suspension form and a side lying form which can be switched with each other. According to the transverse sliding type crawling ladder, through the variable pulley assembly, the crawling ladder can be switched between a suspension state and a side lying state, and the inspection requirements of the top and the bottom of a cargo hold are met; no matter suspended on the top or lying on the side at the bottom, sliding supporting is achieved through the pulleys / trundles, suspension shaking of workers is avoided, operation is facilitated, and meanwhile the falling risk can be reduced.

Description

Technical Field

[0001] This invention relates to the field of ship cargo hold maintenance equipment technology, specifically to a horizontal sliding ladder and a method for inspecting and cleaning ship cargo holds. Background Technology

[0002] Ship cargo holds (such as those of bulk carriers and container ships) require regular inspection for bulkhead cracks or cleaning of accumulated dust. However, the current mainstream method involves suspending workers using safety ropes, which generally presents the following problems: Inconvenient to operate: Staff are prone to swaying in mid-air, making inspection and cleaning operations inconvenient; High risk: Poor suspension stability and high risk of falling.

[0003] Therefore, there is an urgent need for a maintenance device that can provide stable support and is adaptable to different locations (top / bottom) of the cargo hold. Summary of the Invention

[0004] The first technical problem to be solved by the present invention is to provide a horizontal sliding ladder. The core design is a "variable pulley assembly with switchable form", which allows the ladder to slide laterally both suspended on the top beam of the cargo hold and tilted at the bottom of the cargo hold. This solves the problems of inconvenience and high risk in traditional operation methods.

[0005] To achieve the above objectives, the present invention provides the following technical solution: A horizontal sliding ladder includes two vertically arranged support frames and multiple horizontally connected footboards that are linearly arrayed along the height direction of the support frames. Its core improvement lies in the fact that: the rear sides of the two support frames are simultaneously equipped with slides that can slide up and down along their height direction, and the rear top of the support frame and the rear side of the slides are both fixed with variable pulley assemblies, which enable the entire horizontal sliding ladder to slide laterally. The variable pulley assembly has two interchangeable modes: suspended and side-lying. When the variable pulley assembly is in the suspended state, the entire horizontal sliding ladder can be suspended at the edge of the crossbeam at the top of the cargo hold and slide laterally along the crossbeam. When the variable pulley assembly is in the side-lying state, the entire horizontal sliding ladder can lie sideways on the inclined cargo hold at the bottom of the cargo hold and slide laterally along the inclined cargo hold.

[0006] By adopting the above solution, the horizontal sliding ladder can switch between suspended and side-lying modes through a variable pulley assembly, covering the inspection needs of the top and bottom of the cargo hold; whether suspended at the top or lying on its side at the bottom, it achieves "sliding support" through pulleys / casters, avoiding the swaying of the suspended personnel, which is convenient for operation and reduces the risk of falling.

[0007] As a preferred embodiment of a horizontal sliding ladder, the front surface of the support frame is provided with a plurality of positioning holes arranged in a linear array along its length, and the front surface of the slide is equipped with positioning bolts that can extend into the positioning holes. The slide is quickly locked by the cooperation of the positioning bolts and the positioning holes.

[0008] As a preferred embodiment of a sliding ladder, in order to improve the stability of the sliding ladder when working at the bottom of the cargo hold, a horizontally arranged bottom beam is connected to the bottom of the two support frames. Two sets of cross-arranged casters that can slide laterally are fixed at the bottom of the bottom beam. The casters abut against the triangular track at the bottom of the cargo hold to improve the stability of the sliding ladder when sliding laterally.

[0009] As a preferred embodiment of a horizontal sliding ladder, the variable pulley assembly includes a longitudinal beam. A fixed pulley, vertically positioned and capable of horizontal sliding, is fixed at the bottom of one end of the longitudinal beam near the support frame. A sliding sleeve, capable of sliding along its length, is also installed on the longitudinal beam. A sliding pulley, parallel to the fixed pulley, is fixed at the bottom of the sliding sleeve. A rotatable flip-up pulley, capable of horizontal sliding, is rotatably connected to the bottom of the sliding pulley. When the sliding pulley and the flip-up pulley are perpendicular to each other, the variable pulley assembly is in a suspended state. When the sliding pulley and the flip-up pulley are on the same axis, the variable pulley assembly is in a side-lying state. It adapts to dual scenarios, achieving two uses for one ladder.

[0010] As a preferred implementation of a horizontal sliding ladder, the fixed pulley, sliding pulley, and flip-over pulley all have the same wheel diameter, which can improve their versatility during later maintenance and replacement.

[0011] As a preferred embodiment of a horizontal sliding ladder, the upper surface of the longitudinal beam is provided with multiple positioning holes arranged in a linear array along its length, and the upper surface of the sliding sleeve is equipped with positioning bolts that can extend into the positioning holes. The sliding sleeve is quickly locked by the cooperation of the positioning bolts and the positioning holes.

[0012] As a preferred embodiment of a horizontal sliding ladder, a limit slot is provided at the rotational connection between the sliding pulley and the flip pulley. A limit pin is inserted into the limit slot to fix the flip pulley's flipped state. The limit slot is a cross slot, and the limit pin is a flat pin. Each time the flip pulley is adjusted, the limit pin only needs to be pulled out. After the adjustment is completed, the limit pin can be inserted back into the limit slot.

[0013] The second technical problem to be solved by the present invention is to provide a method for inspecting and cleaning ship cargo holds using a sliding ladder. The core design of the sliding ladder is a "variable pulley assembly with switchable form", which allows the ladder to slide laterally both suspended on the top beam of the cargo hold and tilted at the bottom of the cargo hold. This method can form a standardized and streamlined inspection and cleaning process to solve the problems of inconvenience and high risk in traditional operation methods.

[0014] To achieve the above objectives, the present invention provides the following technical solution: A method for inspecting and cleaning a ship's cargo hold, which is implemented with the assistance of a horizontal sliding ladder for inspecting or cleaning the top or bottom of the cargo hold; The following are the operating procedures for inspecting or cleaning the top of the cargo hold: S1. Adjust the position of the slide so that the distance between the variable pulley assembly at the rear of the top of the support frame and the variable pulley assembly at the rear of the slide is equal to the distance between the top crossbeams of the two adjacent cargo holds. S2. Adjust the position of the sliding sleeve so that the distance between the fixed pulley and the sliding pulley is equal to the thickness of the protrusion at the edge of the cargo hold top beam. S3. Adjust the position of the flip-up pulley so that the sliding pulley and the flip-up pulley are perpendicular to each other. At this time, the variable pulley assembly is in a suspended state. S4. The horizontal sliding ladder is suspended as a whole at the edge of the top beam of the cargo hold, and the staff wear safety ropes and stand on the horizontal sliding ladder to inspect or clean. S5. Workers can perform lateral inspections or cleaning by using the lateral sliding ladder; workers can also perform longitudinal inspections or cleaning by climbing up and down the lateral sliding ladder; this makes inspecting or cleaning the cargo hold both safe and convenient.

[0015] The operating procedures for inspecting or cleaning the bottom of the cargo hold are as follows: S1. Adjust the position of the sliding sleeve so that it is at the end of the longitudinal beam; S2. Adjust the position of the flip-up pulley so that the sliding pulley and the flip-up pulley are on the same axis. At this time, the variable pulley assembly is in a side-lying position. S4. The horizontal sliding ladder is placed sideways on the inclined cargo hold at the bottom of the cargo hold. The bottom of the horizontal sliding ladder is supported by two sets of cross-set casters on the triangular track at the bottom of the cargo hold. Workers wearing safety ropes stand on the horizontal sliding ladder to inspect or clean. S5. Workers can perform lateral inspections or cleaning by using the lateral sliding ladder; workers can also perform longitudinal inspections or cleaning by climbing up and down the lateral sliding ladder; this makes inspecting or cleaning the cargo hold both safe and convenient.

[0016] The beneficial effects of this invention are: 1. Adaptable to dual scenarios: Through the variable pulley assembly, the ladder can switch between suspended / side-lying modes to cover the inspection needs of the top and bottom of the cargo hold; 2. High stability: Whether suspended from the top or lying on its side at the bottom, it achieves "sliding support" through pulleys / casters, preventing workers from swaying while suspended, thus facilitating operations; 3. Flexible adjustment: The shape and position of the components can be quickly adjusted using positioning bolts and limit pins to adapt to the structural dimensions of different cargo holds; 4. Safe and convenient: Staff can move directly horizontally / vertically while standing on the ladder without having to be frequently resuspended, reducing the risk of falling. Attached Figure Description

[0017] To more clearly illustrate the technical solutions in the embodiments of the present invention or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present invention. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0018] Figure 1 The three-dimensional structure of the horizontal sliding ladder in Embodiment 1 Figure 1 ; Figure 2 The three-dimensional structure of the horizontal sliding ladder in Embodiment 1 Figure 2 ; Figure 3 for Figure 2 A magnified view of a section at point A in the middle; Figure 4 This is a side view of the horizontal sliding ladder used in Embodiment 1. Figure 5 for Figure 4 A magnified view of a section at point B in the middle; Figure 6 This is a three-dimensional structural diagram of the variable pulley assembly in the suspended state; Figure 7 for Figure 6 A magnified view of a section at point C; Figure 8 This is a real-world image showing the application of the horizontal sliding ladder in Example 1. Figure 9 The three-dimensional structure of the horizontal sliding ladder in Embodiment 2 Figure 1 ; Figure 10 The three-dimensional structure of the horizontal sliding ladder in Embodiment 2 Figure 2 ; Figure 11 This is a side view of the horizontal sliding ladder used in Embodiment 1. Figure 12 for Figure 11 A magnified view of a section at point D; Figure 13 This is a three-dimensional structural diagram of the variable pulley assembly in the suspended state; Figure 14 This is a real-world example of the application of the horizontal sliding ladder in Example 2.

[0019] Markings in the diagram: 1-Support frame; 2-Step frame; 3-Slide seat; 4-Positioning hole one; 5-Positioning bolt one; 6-Variable pulley assembly; 61-Longitudinal beam; 62-Fixed pulley; 63-Sliding sleeve; 64-Sliding pulley; 65-Flip pulley; 66-Positioning hole two; 67-Positioning bolt two; 68-Limiting slot; 69-Limiting pin; 7-Bottom beam; 8-Cast; 9-Board compartment; 10-Crossbeam; 11-Triangular track. Detailed Implementation

[0020] 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.

[0021] Example 1, as Figures 1 to 2 As shown, a horizontal sliding ladder is provided for inspecting and cleaning the top of a ship's cargo hold. Specifically, it includes two vertically arranged support frames 1 and multiple horizontally welded footboards 2 that are linearly arrayed along the height direction of the support frames 1 between the two support frames 1.

[0022] like Figures 1 to 2 As shown, slides 3 that can slide up and down along their height direction are installed on the rear sides of the two support frames 1. Variable pulley assemblies 6 are fixed to the rear top of the support frame 1 and the rear side of the slides 3. The variable pulley assemblies 6 enable the entire horizontal sliding ladder to slide laterally.

[0023] like Figure 3 As shown, the front surface of the support frame 1 has multiple positioning holes 4 arranged in a linear array along its length. The front surface of the slide block 3 is equipped with positioning bolts 5 that can extend into the positioning holes 4. The slide block 3 is quickly locked by the cooperation of the positioning bolts 5 and the positioning holes 4.

[0024] like Figures 1 to 2As shown, in order to improve the stability of the horizontal sliding ladder when operating at the bottom of the cargo hold, a horizontally arranged bottom beam 7 is welded to the bottom of the two support frames 1. Two sets of cross-arranged casters 8 that can slide laterally are welded and fixed to the bottom of the bottom beam 7. The casters 8 abut against the triangular track 11 at the bottom of the cargo hold to improve the stability of the horizontal sliding ladder when sliding laterally.

[0025] like Figures 4 to 5 As shown, the variable pulley assembly 6 has two interchangeable modes: suspended and side-lying. Here, the variable pulley assembly 6 adopts the suspended mode. When the variable pulley assembly 6 is in the suspended mode, the entire horizontal sliding ladder can be suspended at the edge of the crossbeam 10 on the top of the cargo hold and slide laterally along the crossbeam 10.

[0026] like Figure 6 As shown, the variable pulley assembly 6 includes a longitudinal beam 61. A fixed pulley 62, which is vertically arranged and can slide laterally, is welded and fixed to the bottom of one end of the longitudinal beam 61 near the support frame 1. A sliding sleeve 63, which can slide along its length, is also installed on the longitudinal beam 61. A sliding pulley 64, which is parallel to the fixed pulley 62, is welded and fixed to the bottom of the sliding sleeve 63. A flip-up pulley 65, which can slide laterally, is rotatably connected to the bottom end of the sliding pulley 64. When the sliding pulley 64 and the flip-up pulley 65 are perpendicular to each other, the variable pulley assembly 6 is in a suspended state.

[0027] Continue as Figure 6 As shown, the fixed pulley 62, the sliding pulley 64, and the flip-over pulley 65 have the same wheel diameter, which improves their versatility during later maintenance and replacement.

[0028] like Figure 6 As shown, the upper surface of the longitudinal beam 61 is provided with a plurality of positioning holes 66 arranged in a linear array along its length. The upper surface of the sliding sleeve 63 is provided with positioning bolts 67 that can extend into the positioning holes 66. The sliding sleeve 63 is quickly locked by the cooperation of the positioning bolts 67 and the positioning holes 66.

[0029] like Figure 7 As shown, a limiting slot 68 is provided at the rotational connection between the sliding pulley 64 and the flip pulley 65. A limiting pin 69 is inserted into the limiting slot 68 to fix the flip pulley 65 in its flipped state. The limiting slot 68 is a cross-shaped slot, and the limiting pin 69 is a flat pin. Each time the flip pulley 65 is adjusted, the limiting pin 69 only needs to be pulled out. After the adjustment is completed, the limiting pin 69 can be inserted back into the limiting slot 68.

[0030] like Figures 4 to 5 , Figure 8As shown, a method for inspecting and cleaning a ship's cargo hold, assisted by a sliding ladder, is used for inspecting or cleaning the top of the cargo hold. The operating steps are as follows: S1. Adjust the position of the slide block 3 so that the distance between the variable pulley assembly 6 on the rear side of the top of the support frame 1 and the variable pulley assembly 6 on the rear side of the slide block 3 is equal to the distance between the two adjacent top beams 10 of the cargo hold. S2. Adjust the position of the sliding sleeve 63 so that the distance between the fixed pulley 62 and the sliding pulley 64 is equal to the thickness of the protrusion at the edge of the cargo hold top beam 10. S3. Adjust the position of the flip-type pulley 65 so that the sliding pulley 64 and the flip-type pulley 65 are perpendicular to each other. At this time, the variable pulley assembly 6 is in a suspended state. S4. The horizontal sliding ladder is suspended as a whole at the edge of the top beam 10 of the cargo hold, and the staff wear safety ropes and stand on the horizontal sliding ladder to inspect or clean. S5. Workers can perform lateral inspections or cleaning by using the lateral sliding ladder; workers can also perform longitudinal inspections or cleaning by climbing up and down the lateral sliding ladder; this makes inspecting or cleaning the cargo hold both safe and convenient.

[0031] Example 2, as Figures 9 to 12 As shown, the only difference between this embodiment and Embodiment 1 is that, based on Embodiment 1, the suspension mode of the variable pulley assembly is switched to the side-lying mode; when the variable pulley assembly 6 is in the side-lying mode, the entire horizontal sliding ladder can lie sideways on the inclined cabin body at the bottom of the cargo hold and slide laterally along the inclined cabin body.

[0032] like Figure 13 As shown, based on Embodiment 1, the sliding pulley 64 and the flip-up pulley 65 in the variable pulley assembly are transformed from being perpendicular to each other to having the sliding pulley 64 and the flip-up pulley 65 located on the same axis, and the variable pulley assembly 6 is in a side-lying state.

[0033] like Figures 11 to 12 , Figure 14 As shown, a method for inspecting and cleaning a ship's cargo hold, assisted by a sliding ladder, is used for inspecting or cleaning the bottom of the cargo hold. The operating steps are as follows: The operating procedures for inspecting or cleaning the bottom of the cargo hold are as follows: S1. Adjust the position of the sliding sleeve 63 so that the sliding sleeve 63 is at the end of the longitudinal beam 61; S2. Adjust the position of the flip-type pulley 65 so that the sliding pulley 64 and the flip-type pulley 65 are on the same axis. At this time, the variable pulley assembly 6 is in a side-lying position. S4. The horizontal sliding ladder is placed sideways on the inclined cargo hold at the bottom of the cargo hold. The bottom of the horizontal sliding ladder is supported by two sets of cross-set casters 8 on the triangular track 11 at the bottom of the cargo hold. Workers wearing safety ropes stand on the horizontal sliding ladder to inspect or clean. S5. Workers can perform lateral inspections or cleaning by using the lateral sliding ladder; workers can also perform longitudinal inspections or cleaning by climbing up and down the lateral sliding ladder; this makes inspecting or cleaning the cargo hold both safe and convenient.

[0034] The above are merely preferred embodiments of the present invention and are not intended to limit the present invention. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the present invention should be included within the protection scope of the present invention.

Claims

1. A horizontal sliding ladder, comprising two vertically arranged support frames and multiple horizontally connected footboards arranged in a linear array along the height direction of the support frames; Its features are: Two support frames are simultaneously equipped with slides that can slide up and down along their height direction. Variable pulley assemblies are fixed to the rear top of the support frames and the rear of the slides, allowing the entire horizontal sliding ladder to slide laterally. The variable pulley assembly has two interchangeable modes: suspended and side-lying. When the variable pulley assembly is in the suspended state, the entire horizontal sliding ladder can be suspended at the edge of the crossbeam at the top of the cargo hold and slide laterally along the crossbeam. When the variable pulley assembly is in the side-lying state, the entire horizontal sliding ladder can lie sideways on the inclined cargo hold at the bottom of the cargo hold and slide laterally along the inclined cargo hold.

2. The horizontal sliding ladder according to claim 1, characterized in that, The bottom ends of the two support frames are connected to a horizontally arranged bottom beam, and the bottom of the bottom beam is fixed with two sets of cross-arranged casters that can slide laterally.

3. The horizontal sliding ladder according to claim 1 or 2, characterized in that, The variable pulley assembly includes a longitudinal beam, with a fixed pulley that is vertically arranged and can slide laterally fixed at one end of the longitudinal beam near the support frame. A sliding sleeve that can slide along its length is also installed on the longitudinal beam. A sliding pulley that is parallel to the fixed pulley is fixed at the bottom of the sliding sleeve. A flip-up pulley that can slide laterally is rotatably connected to the bottom end of the sliding pulley. When the sliding pulley and the tilting pulley are perpendicular to each other, the variable pulley assembly is in a suspended state; when the sliding pulley and the tilting pulley are on the same axis, the variable pulley assembly is in a side-lying state.

4. The horizontal sliding ladder according to claim 3, characterized in that, The fixed pulley, sliding pulley, and tilting pulley all have the same wheel diameter.

5. The horizontal sliding ladder according to claim 3, characterized in that, The upper surface of the longitudinal beam is provided with a plurality of positioning holes arranged in a linear array along its length, and the upper surface of the sliding sleeve is provided with positioning bolts that can extend into the positioning holes.

6. The horizontal sliding ladder according to claim 3, characterized in that, A limit slot is provided at the rotational connection between the sliding pulley and the flip pulley, and a limit pin that can fix the flip pulley in the flipped state is inserted into the limit slot.

7. The horizontal sliding ladder according to claim 6, characterized in that, The limiting slot is a cross-shaped slot, and the limiting pin is a flat pin.

8. The horizontal sliding ladder according to claim 1, characterized in that, The front surface of the support frame has multiple positioning holes arranged in a linear array along its length, and the front surface of the slide is equipped with positioning bolts that can extend into the positioning holes.

9. A method for inspecting and cleaning a ship's cargo hold, used for inspecting or cleaning the top of the cargo hold, characterized in that, This method is implemented using the horizontal sliding ladder as described in claim 3, and its operation steps are as follows: S1. Adjust the position of the slide so that the distance between the variable pulley assembly at the rear of the top of the support frame and the variable pulley assembly at the rear of the slide is equal to the distance between the top crossbeams of the two adjacent cargo holds. S2. Adjust the position of the sliding sleeve so that the distance between the fixed pulley and the sliding pulley is equal to the thickness of the protrusion at the edge of the cargo hold top beam. S3. Adjust the position of the flip-up pulley so that the sliding pulley and the flip-up pulley are perpendicular to each other. At this time, the variable pulley assembly is in a suspended state. S4. The horizontal sliding ladder is suspended as a whole at the edge of the top beam of the cargo hold, and the staff wear safety ropes and stand on the horizontal sliding ladder to inspect or clean. S5. Workers can perform lateral inspections or cleaning by using the lateral sliding ladder; workers can also perform longitudinal inspections or cleaning by climbing up and down the lateral sliding ladder; this makes inspecting or cleaning the cargo hold both safe and convenient.

10. A method for inspecting and cleaning a ship's cargo hold, used for inspecting or cleaning the bottom of the cargo hold, characterized in that, This method is implemented using the horizontal sliding ladder as described in claim 3, and its operation steps are as follows: S1. Adjust the position of the sliding sleeve so that it is at the end of the longitudinal beam; S2. Adjust the position of the flip-up pulley so that the sliding pulley and the flip-up pulley are on the same axis. At this time, the variable pulley assembly is in a side-lying position. S4. The horizontal sliding ladder is placed sideways on the inclined cargo hold at the bottom of the cargo hold. The bottom of the horizontal sliding ladder is supported by two sets of cross-set casters on the triangular track at the bottom of the cargo hold. Workers wearing safety ropes stand on the horizontal sliding ladder to inspect or clean. S5. Workers can perform lateral inspections or cleaning by using the lateral sliding ladder; workers can also perform longitudinal inspections or cleaning by climbing up and down the lateral sliding ladder; this makes inspecting or cleaning the cargo hold both safe and convenient.

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