An intelligent safety inspection device and usage method for a boarding ladder

Abstract

The present invention discloses an intelligent safety inspection device and a usage method for a boarding ladder, which relates to the technical field of inspection devices and includes a hull, a ship ladder, an inspection path, an inspection robot, a lubrication mechanism, and a support mechanism. The ship ladder is arranged at the deck on one side of the hull. The ship ladder includes a group of cylinders, several hinge frames, pedals, and telescopic handrails. The inspection path is arranged between the hull and the ship ladder and is consistent with the telescopic direction of the ship ladder. The inspection robot is placed on the inspection path, and the support mechanism is arranged above the inspection path. The lubrication mechanism includes an oil tank and several oil pipes. The oil pipes are of a hollow structure, and three groups of lubrication components are arranged at the hinge positions of the hinge frames. Each lubrication component includes a rotating frame, a hemispherical valve block, a telescopic rod, and a sponge body. The present invention can detect the telescopic state of the ship ladder, provide lubrication and emergency support, and improve safety.

Description

Technical Field

[0001] The present invention relates to the technical field of inspection equipment, and specifically to an intelligent safety inspection equipment and usage method for boarding ladders. Background Technique

[0002] As an important connecting device between ships and docks, the safety and maintenance efficiency of boarding ladders are crucial for ensuring the safe transfer of personnel and materials. For small ships, generally foldable steel structure ladders are used. Foldable ship ladders are designed to focus on the effective use of space and the convenience of operation, and can be retracted when not needed.

[0003] Inspection equipment is a tool or system used for regular inspection and maintenance of equipment to ensure its normal operation. They play an important role in different industries and fields, such as manufacturing, energy industry, transportation, etc. The pedals of the foldable ship ladder are hinged to the connecting parts on both sides. Due to the influence of the use environment, the connecting parts of the foldable ship ladder, such as hinges, pin shafts, etc., may become rusted, stuck or worn due to long-term use and environmental factors (such as seawater corrosion, weather changes), affecting the stability and safety of the ship ladder. At present, the safety inspection of foldable ship ladders is basically carried out by staff, and subtle problems cannot be detected in time. Inspection equipment can make up for this deficiency, so there is a need for an inspection equipment dedicated to boarding ladders. Summary of the Invention

[0004] The purpose of the present invention is to provide an intelligent safety inspection equipment and usage method for boarding ladders to solve the problems raised in the above background technique.

[0005] To solve the above technical problems, the present invention provides the following technical solution: an intelligent safety inspection equipment and usage method for boarding ladders, including a hull, a ship ladder, an inspection path, an inspection robot, a lubrication mechanism, and a support mechanism. The ship ladder is arranged at the deck on one side of the hull. The ship ladder includes a group of cylinders, several articulated frames, pedals, and telescopic handrails. The inspection path is arranged between the hull and the ship ladder and is consistent with the telescopic direction of the ship ladder. The inspection robot is placed on the inspection path, and the support mechanism is arranged above the inspection path.

[0006] According to the above technical solution, the lubrication mechanism includes an oil tank and a plurality of oil pipes. The oil tank is fixed to the lower side of the hull deck. The oil pipes are arranged on both sides of the corresponding pedals and are connected to the oil tank by oil delivery pipes. Two connecting sleeves are sleeved on the oil pipes, and the connecting sleeves are fixedly connected to the pedals. The oil pipes are of a hollow structure, and three groups of lubrication components are arranged at the hinge positions of the hinge frames. The lubrication components include a rotating frame, a hemispherical valve block, a telescopic rod, and a sponge body. One end of the rotating frame is fixedly connected to the corresponding hinge frame, and the other end of the rotating frame penetrates into the oil pipe and is rotatably matched with it. The hemispherical valve block is fixed to the end of the rotating frame facing the oil pipe, and the outer diameter of the hemispherical valve block matches the inner diameter of the oil pipe. The telescopic rod is fixed inside the rotating frame, and the sponge body is arranged inside the telescopic rod.

[0007] According to the above technical solution, the inspection robot is provided with a visual detection module 1 for monitoring the state during the telescopic process of the ship ladder.

[0008] According to the above technical solution, lubricating oil is stored in the oil tank, and there are oil delivery ports with the same number as the oil pipes. Each oil delivery port communicates with the corresponding oil pipe, and there are two oil inlet ports on the opposite sides of the oil pipe.

[0009] According to the above technical solution, a main oil chamber, a plurality of oil pumps 1, an oil circuit, and a liquid level detection chamber are arranged in the oil tank. The liquid level detection chamber is connected to each oil delivery pipe. A liquid level detection module is arranged inside the liquid level detection chamber for detecting the reduction of lubricating oil before and after lubrication. The oil circuit connects the main oil chamber and the corresponding liquid level detection chamber. The oil pump 1 is arranged at the end of the oil circuit for quantitatively delivering the lubricating oil in the main oil chamber to the liquid level detection chamber. An oil pump 2 is arranged on the oil delivery pipe for delivering the lubricating oil in the liquid level detection chamber into the oil delivery pipe and pumping the remaining lubricating liquid back into the liquid level detection chamber.

[0010] According to the above technical solution, a track is laid on the inspection path for guiding the inspection robot to move on the set route and assisting the inspection robot to stay on the slope.

[0011] According to the above technical solution, the support mechanism includes a support frame, several groups of first support rods, second support rods, and a driving module. The support frame is fixed on the inspection path. The two ends of the first support rods and the second support rods are respectively connected to the support frame and the hull. Each group of the first support rods and the second support rods are arranged in parallel and are located below the pedal after the ship ladder is extended. A driving shaft and an extension rod are arranged in both the first support rod and the second support rod. One end of the driving shaft is rotationally matched with the hull. The extension rod is sleeved outside the driving shaft and is in threaded cooperation with it. The first support rod and the second support rod corresponding to the extension rod are in sliding cooperation. The driving shafts of the first support rod and the second support rod are connected by a pulley. The driving shaft of the first support rod is connected to the driving module by a pulley.

[0012] According to the above technical solution, the driving module includes a rotating rod, a group of driven gears, a driven belt pulley, a driving gear, and a motor. The rotating rod rotates below the inspection path. The driven gear is arranged at one end of the rotating rod and is located at the center position of the inspection path. The driven belt pulley is arranged at the other end of the rotating rod and is belt-connected to the driving shaft of the first support rod. The motor is arranged on the inspection robot. The driving gear is sleeved on the driving end of the motor.

[0013] According to the above technical solution, an installation plate is arranged on one side of the inspection robot. A sliding plate is arranged in the installation plate. The sliding plate is connected to an electric push rod. A visual detection module two is arranged below the sliding plate and is used to assist in the docking of the driven gear and the driving gear. Compared with the prior art, the beneficial effects achieved by the present invention are as follows: In the present invention, by providing an inspection robot and a lubrication mechanism, the telescopic state of the ship ladder can be detected and analyzed, the positions with jamming and slow rotation can be lubricated, and whether maintenance is required can be judged according to the lubricating oil consumption at one time, improving flexibility; by providing a support mechanism, in the case where the inspection robot judges that the hinge frame is loose, emergency support treatment can be carried out on the corresponding pedal, and through personnel maintenance, safety is improved. Description of the Drawings

[0014] The drawings are used to provide a further understanding of the present invention and constitute a part of the specification. They are used to explain the present invention together with the embodiments of the present invention and do not constitute a limitation to the present invention. In the drawings:

[0015] Figure 1 is the overall structural schematic diagram of the present invention;

[0016] Figure 2 is the partial schematic diagram of the present invention;

[0017] Figure 3Schematic diagram of the installation position of the oil pipe of the present invention;

[0018] Figure 4 Schematic diagram of the lubrication mechanism of the present invention;

[0019] Figure 5 Schematic diagram of the lubrication component of the present invention;

[0020] Figure 6 Partial cross-sectional view of the lubrication component of the present invention;

[0021] Figure 7 Schematic diagram of the hemispherical valve block in the retracted state of the ship ladder of the present invention;

[0022] Figure 8 Schematic diagram of the hemispherical valve block in the extended state of the ship ladder of the present invention;

[0023] Figure 9 Schematic diagram of the support mechanism of the present invention;

[0024] Figure 10 Partial cross-sectional view of the first support rod and the second support rod of the present invention;

[0025] Figure 11 Schematic diagram of the second support rod of the present invention;

[0026] Figure 12 Schematic diagram of the drive module of the present invention;

[0027] Figure 13 Schematic diagram of the inspection robot of the present invention; In the figure: 1, hull; 2, ship ladder; 21, cylinder; 22, hinge frame; 23, pedal; 24, telescopic handrail; 3, inspection path; 31, track; 4, inspection robot; 41, visual detection module 1; 42, mounting plate; 43, sliding plate; 44, electric push rod; 45, visual detection module 2; 46, lubrication tank; 5, fuel tank; 50, oil inlet; 51, main oil chamber; 52, oil pump 1; 53, oil circuit; 54, liquid level detection chamber; 6, oil pipe; 61, connecting sleeve; 62, rotating frame; 63, hemispherical valve block; 64, telescopic rod; 65, sponge body; 66, oil inlet; 7, oil delivery pipe; 71, oil pump 2; 81, support frame; 82, first support rod; 83, second support rod; 84, drive module; 841, rotating rod; 842, driven gear; 843, driven pulley; 844, driving gear; 845, motor; 85, drive shaft; 86, extension rod; 861, slider. Detailed implementation manners

[0028] The following will clearly and completely describe the technical solutions in the embodiments of the present invention with reference to the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are only a part of the embodiments of the present invention, rather than all the embodiments. All other embodiments obtained by those of ordinary skill in the art based on the embodiments of the present invention without creative efforts belong to the scope of protection of the present invention.

[0029] Please refer to Figures 1-13 , the present invention provides a technical solution: an intelligent safety inspection device and a use method for a boarding ladder, including a hull 1, a ship ladder 2, an inspection path 3, an inspection robot 4, a lubrication mechanism, and a support mechanism. The ship ladder 2 is arranged at the deck on one side of the hull 1. The ship ladder 2 includes a set of cylinders 21, several hinge frames 22, pedals 23, and telescopic handrails 24. The inspection path 3 is arranged between the hull 1 and the ship ladder 2 and is consistent with the telescopic direction of the ship ladder 2. The inspection robot 4 is placed on the inspection path 3, and the support mechanism is arranged on the upper side of the inspection path 3;

[0030] The lubrication mechanism includes an oil tank 5 and several oil pipes 6. The oil tank 5 is fixed to the lower side of the deck of the hull 1. The oil pipes 6 are arranged on both sides of the corresponding pedals 23 and are connected to the oil tank 5 by an oil delivery pipe 7. Two connecting sleeves 61 are sleeved on the oil pipes 6, and the connecting sleeves 61 are fixedly connected to the pedals 23. The oil pipes 6 are of a hollow structure and are provided with three groups of lubrication components at the hinge positions of the hinge frames 22. The lubrication components include a rotating frame 62, a hemispherical valve block 63, a telescopic rod 64, and a sponge body 65. One end of the rotating frame 62 is fixedly connected to the corresponding hinge frame 22, and the other end of the rotating frame 62 penetrates into the oil pipe 6 and is rotatably matched with it. The hemispherical valve block 63 is fixed to the end of the rotating frame 62 facing the oil pipe 6, and the outer diameter of the hemispherical valve block 63 matches the inner diameter of the oil pipe 6. The telescopic rod 64 is fixed to the inner side of the rotating frame 62, and the sponge body 65 is arranged inside the telescopic rod 64.

[0031] The inspection robot 4 is provided with a visual detection module 41 for monitoring the state during the telescopic process of the ship ladder 2.

[0032] The following is a supplementary description of the above structure: The structural connection of the ship ladder 2 is the same as the conventional setting. In this case, the fixed end of the cylinder 21 is installed under the deck, and the driving end is connected to the hinge frame 22 for driving the telescopic movement of the ship ladder 2;

[0033] The oil tank 5 stores lubricating oil and is provided with an oil delivery port 50 with the same number as the oil pipes 6. Each oil delivery port 50 communicates with the corresponding oil pipe 6. Preferably, there are two oil inlet ports 66 on the opposite sides of the oil pipe 6;

[0034] The sponge body 65 corresponds to the hinge position of the hinge frame 22. The sponge body 65 is used to soak the lubricating oil and apply it to the hinge position. The telescopic rod 64 is used to support the sponge body 65 and at the same time leave a movable space;

[0035] In one embodiment, as Figures 7-8 shown, the ship ladder 2 in the contracted state is the initial state. The spherical surfaces of the hemispherical valve blocks 63 on both sides inside the oil pipe 6 are biased towards the upper side, and the spherical surface of the hemispherical valve block 63 in the middle is biased towards either the left or the right side. If lubricating oil is injected at this time, each sponge body 65 can smoothly contact and absorb the lubricating oil, thereby lubricating the hinge joints; the process of extending the ship ladder 2 is also the process in which each hemispherical valve block 63 cuts off the contact between the lubricating oil and the sponge body 65. In the fully extended state, the spherical surfaces of the hemispherical valve blocks 63 on both sides inside the oil pipe 6 face the hemispherical valve block 63 in the middle, and the spherical surface of the hemispherical valve block 63 in the middle faces the bottom of the oil pipe 6. The hemispherical valve block 63 cuts off the contact between the lubricating oil and the sponge body 65. To avoid interference, the default amount of lubricating oil input should satisfy not being higher than half of the diameter width of the hemispherical valve block 63. If the hinge joints of the hinge frame 22 rust, it will cause difficulty in the process of extending the ship ladder 2, and the contact time between the lubricating oil and the sponge body 65 becomes longer. The lubrication time can be independently extended according to the actual situation.

[0036] As Figure 4 shown, a total oil chamber 51, several first oil pumps 52, an oil circuit 53, and a liquid level detection chamber 54 are provided in the fuel tank 5. Among them, the liquid level detection chamber 54 is connected to each oil delivery pipe 7. A liquid level detection module is built in the liquid level detection chamber 54 for detecting the reduction of the lubricating oil before and after lubrication. The oil circuit 53 communicates the total oil chamber 51 with the corresponding liquid level detection chamber 54. The first oil pump 52 is arranged at the end of the oil circuit 53 for quantitatively delivering the lubricating oil in the total oil chamber 51 to the liquid level detection chamber 54. An oil pump two 71 is arranged on the oil delivery pipe 7 for delivering the lubricating oil in the liquid level detection chamber 54 into the oil delivery pipe 7 and pumping the remaining lubricating liquid back into the liquid level detection chamber 54.

[0037] A track 31 is laid on the inspection path 3 for guiding the inspection robot 4 to move on a set route and assisting the inspection robot 4 to stay on the slope.

[0038] As Figures 9-11 shown, the support mechanism includes a support frame 81, several groups of first support rods 82, second support rods 83, and a drive module 84. Among them, the support frame 81 is fixed on the inspection path 3. The two ends of the first support rods 82 and the second support rods 83 are respectively connected to the support frame 81 and the hull 1. Each group of the first support rods 82 and the second support rods 83 are arranged in parallel and are located in the lower side direction of the pedal 23 after the ship ladder 2 is extended. Drive shafts 85 and extension rods 86 are arranged inside both the first support rods 82 and the second support rods 83. One end of the drive shaft 85 is rotationally matched with the hull 1. The extension rod 86 is sleeved outside the drive shaft 85 and is in threaded cooperation with it. The first support rods 82 and the second support rods 83 corresponding to the extension rod 86 are in sliding cooperation. The drive shafts 85 of the first support rods 82 and the second support rods 83 are connected by a pulley. The drive shaft 85 of the first support rod 82 is connected to the drive module 84 by a pulley.

[0039] In actual operation, the extension rod 86 is provided with a slider 861. The first support rod 82 and the second support rod 83 are provided with sliding rails in cooperation with the slider 861. When the drive shaft 85 rotates, the extension rod 86 extends to the lower side of the pedal 23 along the direction of the sliding rail, playing an emergency support role.

[0040] The drive module 84 includes a rotating rod 841, a set of driven gears 842, a driven pulley 843, a driving gear 844 and a motor 845. Among them, the rotating rod 841 rotates under the inspection path 3. The driven gear 842 is arranged at one end of the rotating rod 841 and located at the center position of the inspection path 3. The driven pulley 843 is arranged at the other end of the rotating rod 841 and is connected to the drive shaft 85 of the first support rod 82 by a belt. The motor 845 is arranged on the inspection robot 4, and the driving gear 844 is sleeved on the driving end of the motor 845.

[0041] Further, as Figure 13 shown, an installation plate 42 is arranged on one side of the inspection robot 4. A sliding plate 43 is arranged inside the installation plate 42. The sliding plate 43 is connected to an electric push rod 44. A visual detection module two 45 is arranged on the lower side of the sliding plate 43, which is used to assist in the docking of the driven gear 842 and the driving gear 844.

[0042] In actual operation, the driving gear 844 is arranged at the middle position of the inspection robot 4, corresponding to the driven gear 842. The electric push rod 44 is used to adjust the height of the driving gear 844. The height of each set of driven gears 842 is higher than the surface of the inspection path 3. During general inspection operations, the position of the driving gear 844 is higher than that of the driven gear 842. When emergency treatment is required, the inspection robot 4 stays at the corresponding driven gear 842, and through the electric push rod 44 and the visual detection module two 45, the driving gear 844 is docked with the driven gear 842.

[0043] Preferably, in one embodiment, a lubricating box 46 is arranged on the upper side of the driving gear 844 relative to the sliding plate 43. The lubricating box 46 communicates with the upper side of the driving gear 844 and is used to convey lubricating oil to reduce wear when the driving gear 844 is docked with the driven gear 842.

[0044] The specific implementation method is as follows:

[0045] Step 1: The hull 1 anchors when approaching the shore, the ship ladder 2 starts to extend, the inspection robot 4 moves to the inspection path 3 and moves along the chain track 31. During this period, the inspection robot 4 detects the rotation state of each articulated frame 22.

[0046] Step 2: According to the rotation state of the articulated frame 22, the inspection robot 4 judges whether lubrication is required and locates the required articulated frame 22.

[0047] Step 3: The inspection robot 4 sends a lubrication signal to the fuel tank 5. The fuel tank 5 locks the corresponding oil pump 1 52 to input a certain amount of lubricating oil into the liquid level detection chamber 54, and then the oil pump 2 71 pumps the oil in the liquid level detection chamber 54 into the corresponding oil pipe 6;

[0048] Step 4: After the ship ladder 2 is fully extended, the oil pump 2 71 pumps the remaining oil in the oil pipe 6 into the liquid level detection chamber 54 for recording. Personnel start to board the ship. During this period, the inspection robot 4 checks the status of the ship ladder 2 to determine whether there are potential safety hazards and locates the corresponding pedal 23;

[0049] Step 4-1: The inspection robot 4 moves to the corresponding drive module 84, docks the driving gear 844 with the driven gear 842, drives the drive shafts 85 of the first support rod 82 and the second support rod 83 to rotate, extends the extension rod 86, supports it under the pedal 23, and notifies relevant personnel for maintenance;

[0050] Step 5: After boarding is completed, the ship ladder 2 starts to retract. During this period, the inspection robot 4 locks the lubricated hinge frame 22, analyzes the retraction state, and determines whether maintenance is required.

[0051] Specifically, in Step 2, the inspection robot 4 determines the lubrication method as follows: The inspection robot 4 captures the position of the hinge frame 22, records the rotation angle and speed. The rotation angle of the hinge frame 22 is obtained by measuring the angle change with the pedal 23, and the rotation speed is obtained by combining the angle change per unit time, and is compared with the normal rotation state to analyze whether there is jamming or slow rotation. For example, if the hinge frame 22 does not rotate within one unit time, it can be judged as jamming. If the rotation angle of the hinge frame 22 within two unit times is less than the rotation angle of the hinge frame 22 within one unit time in the normal state, it can be judged as slow rotation. The inspection robot 4 notifies the lubrication mechanism to deliver lubricating oil.

[0052] In Step 4, the liquid level detection chamber 54 calculates and compares the oil consumption before and after lubrication. Set the fixed value of the lubricating oil input at one time as A, and the recovered oil volume after the ship ladder 2 is fully extended as B. Calculate according to the liquid level height to determine whether the oil consumption (Q = A - B) is within the ideal range C. If Q is less than or equal to C, the state of the hinge frame 22 is within the normal range, and only lubrication treatment is required. If Q is greater than C, the state of the hinge frame 22 is not ideal and maintenance is required. The oil consumption is associated with the rotation speed of the hinge frame 22. For the hinge frame 22 in an unsatisfactory state, the time taken to rotate to the final state is long, and the time for the corresponding hemisphere valve block 63 to cut off the lubricating oil increases accordingly, and the lubricating oil consumption increases.

[0053] The inspection robot 4 makes the following judgment on the support requirement. During the inspection process, the inspection robot 4 records the axial center positions at the joints between the articulated frames 22 and the pedals 23. When the ship ladder 2 extends and retracts, if the axial center position shifts and the shift amount is greater than the set error margin, the inspection robot 4 determines that there is a problem with the connection of the articulated frame 22 and emergency support is required.

[0054] In step four-one, the vision detection module two 45 is used to lock the edge tooth position of the corresponding driven gear 842, and the motor 845 finely adjusts the edge tooth position of the driving gear 844 to ensure that docking can be achieved up and down. Then, the lubricating box 46 conveys lubricating oil to the surface of the driving gear 844. When the vision detection module two 45 observes that the lubricating oil can drip onto the surface of the driven gear 842, the electric push rod 44 starts to move down for splicing.

[0055] It should be noted that in this article, relational terms such as first and second are only used to distinguish one entity or operation from another entity or operation, and do not necessarily require or imply any actual relationship or order between these entities or operations. Moreover, the term "comprising", "including" or any other variant thereof is intended to cover non-exclusive inclusion, so that a process, method, article or device comprising a series of elements not only includes those elements, but also includes other elements not expressly listed, or elements inherent to such process, method, article or device. Finally, it should be noted that the above are only the preferred embodiments of the present invention and are not used to limit the present invention. Although the present invention has been described in detail with reference to the foregoing embodiments, those skilled in the art can still modify the technical solutions described in the foregoing embodiments, or perform equivalent replacements for some of the technical features. Any modifications, equivalent replacements, improvements, etc. made within the spirit and principle of the present invention shall be included in the protection scope of the present invention.

Claims

1. An intelligent safety inspection device for a boarding ladder, comprising a hull (1), a ladder (2), an inspection path (3), an inspection robot (4), a lubrication mechanism and a support mechanism, characterized in that: The ship ladder (2) is arranged on a deck on one side of the hull (1), the ship ladder (2) comprises a group of cylinders (21), a plurality of articulated frames (22), pedals (23) and a telescopic handrail (24), the inspection path (3) is arranged between the hull (1) and the ship ladder (2) and is consistent with the telescopic direction of the ship ladder (2), the inspection robot (4) is placed on the inspection path (3), and the support mechanism is arranged on the upper side of the inspection path (3); The lubrication mechanism comprises an oil tank (5) and a plurality of oil pipes (6), wherein the oil tank (5) is fixed to the lower side of the deck of the hull (1), the oil pipes (6) are arranged on both sides of the corresponding pedals (23) and are connected to the oil tank (5) via oil delivery pipes (7), the oil pipes (6) are sleeved with two connecting sleeves (61), the connecting sleeves (61) are connected and fixed to the pedals (23), the oil pipes (6) are hollow structures and are provided with three groups of lubrication components at the hinged position cooperating with the hinged frame (22); The lubrication assembly comprises a rotating frame (62), a hemispherical valve block (63), a telescopic rod (64) and a sponge (65), wherein one end of the rotating frame (62) is connected and fixed to the corresponding articulated frame (22), the other end of the rotating frame (62) is inserted into the oil pipe (6) and rotatably cooperates therewith, the hemispherical valve block (63) is fixed on one end of the rotating frame (62) facing the oil pipe (6) and the outer diameter of the hemispherical valve block (63) matches the inner diameter of the oil pipe (6), the telescopic rod (64) is fixed on the inner side of the rotating frame (62), and the sponge (65) is arranged inside the telescopic rod (64).

2. The intelligent safety inspection device for a boarding ladder according to claim 1 is characterized in that: The inspection robot (4) is provided with a visual inspection module 1 (41) for monitoring the state of the ship ladder (2) during its extension and retraction process.

3. The intelligent safety inspection device for a boarding ladder according to claim 2 is characterized in that: The ship ladder (2) in the retracted state is in the initial state. The spherical surfaces of the hemispherical valve blocks (63) located on both sides of the oil pipe (6) are inclined to the upper side, and the spherical surface of the hemispherical valve block (63) located in the middle is inclined to either the left or right side. If lubricating oil is injected at this time, each sponge (65) can smoothly contact and absorb the lubricating oil, thereby lubricating the hinge. The extension process of the ship ladder (2) is also the process in which each hemispherical valve block (63) cuts off the contact between the lubricating oil and the sponge (65). In the fully extended state, the spherical surfaces of the hemispherical valve blocks (63) located on both sides of the oil pipe (6) face the hemispherical valve block (63) in the middle, and the spherical surface of the hemispherical valve block (63) in the middle faces the bottom of the oil pipe (6). The hemispherical valve block (63) cuts off the contact between the lubricating oil and the sponge (65), and the amount of lubricating oil is not more than half of the diameter width of the hemispherical valve block (63).

4. The intelligent safety inspection device for a boarding ladder according to claim 3 is characterized in that: The oil tank (5) is provided with a total oil chamber (51), a plurality of oil pumps (52), an oil circuit (53) and a liquid level detection chamber (54), wherein the liquid level detection chamber (54) is connected to each of the oil delivery pipes (7), and the liquid level detection chamber (54) is provided with a liquid level detection module for detecting the reduction of lubricating oil before and after lubrication. The oil circuit (53) connects the total oil chamber (51) with the corresponding liquid level detection chamber (54), the oil pump (52) is provided at the end of the oil circuit (53) and is used for quantitatively delivering the lubricating oil in the total oil chamber (51) to the liquid level detection chamber (54), and the oil delivery pipe (7) is provided with an oil pump (71) for delivering the lubricating oil in the liquid level detection chamber (54) to the oil delivery pipe (7) and pumping the remaining lubricating liquid back to the liquid level detection chamber (54).

5. The intelligent safety inspection device for a boarding ladder according to claim 4 is characterized in that: The inspection path (3) is provided with a chain track (31) for guiding the inspection robot (4) to move along a set route and assisting the inspection robot (4) to stay on a slope.

6. The intelligent safety inspection device for a boarding ladder according to claim 5 is characterized in that: The support mechanism comprises a support frame (81), a plurality of groups of first support rods (82), second support rods (83) and a drive module (84), wherein the support frame (81) is fixed on the inspection path (3), the first support rods (82) and the second support rods (83) are respectively connected at both ends of the support frame (81) and the hull (1), and each group of the first support rods (82) and the second support rods (83) are arranged in parallel and are located at the lower side of the pedal (23) after the ship ladder (2) is extended; A driving shaft (85) and an extension rod (86) are provided inside the first support rod (82) and the second support rod (83); one end of the driving shaft (85) is rotatably matched with the hull (1); the extension rod (86) is sleeved on the outside of the driving shaft (85) and threadedly matched therewith; the first support rod (82) and the second support rod (83) corresponding to the extension rod (86) are slidably matched; the driving shafts (85) of the first support rod (82) and the second support rod (83) are connected via a pulley; and the driving shaft (85) of the first support rod (82) and the driving module (84) are connected via a pulley.

7. The intelligent safety inspection device for a boarding ladder according to claim 6 is characterized in that: The driving module (84) comprises a rotating rod (841), a group of driven gears (842), a driven pulley (843), a driving gear (844) and a motor (845), wherein the rotating rod (841) rotates on the lower side of the inspection path (3), the driven gear (842) is arranged at one end of the rotating rod (841) and is located in the middle of the inspection path (3), the driven pulley (843) is arranged at the other end of the rotating rod (841) and is connected to the driving shaft (85) of the first support rod (82) by a belt, the motor (845) is arranged on the inspection robot (4), and the driving gear (844) is sleeved on the driving end of the motor (845).

8. The intelligent safety inspection device for a boarding ladder according to claim 7 is characterized in that: A mounting plate (42) is provided on one side of the inspection robot (4), a slide plate (43) is provided inside the mounting plate (42), the slide plate (43) is connected to an electric push rod (44), and a second visual inspection module (45) is provided on the lower side of the slide plate (43).

9. The intelligent safety inspection device for a boarding ladder according to claim 8, characterized in that: A lubrication box (46) is provided on the upper side of the sliding plate (43) relative to the driving gear (844), and the lubrication box (46) is connected to the upper side of the driving gear (844).

10. A method for using an intelligent safety inspection device for a boarding ladder, which is implemented based on the intelligent safety inspection device for a boarding ladder according to claim 9, characterized in that: Step 1: the ship (1) is anchored at the shore, the ship ladder (2) begins to extend, and the inspection robot (4) moves to the inspection path (3) and moves along the chain track (31), during which the inspection robot (4) detects the rotation state of each articulated frame (22); Step 2: Based on the rotation state of the articulated frame (22), the inspection robot (4) determines whether lubrication is required and positions the required articulated frame (22); Step 3: The inspection robot (4) sends a lubrication signal to the oil tank (5), and the oil tank (5) locks the corresponding oil pump 1 (52) to input a certain amount of lubricating oil into the liquid level detection chamber (54), and the oil pump 2 (71) then pumps the oil in the liquid level detection chamber (54) into the corresponding oil pipe (6); Step 4: After the ladder (2) is extended, the oil pump 2 (71) extracts the remaining oil in the oil pipe (6) to the liquid level detection chamber (54) for recording, and personnel begin to board the ship. During this period, the inspection robot (4) checks the status of the ladder (2), determines whether there are potential safety hazards, and locates the corresponding pedal (23); Step 4-1: The inspection robot (4) moves to the corresponding drive module (84), connects the driving gear (844) with the driven gear (842), drives the driving shaft (85) of the first support rod (82) and the second support rod (83) to rotate, and extends the extension rod (86) to support the lower side of the pedal (23), and notifies relevant personnel to carry out maintenance; Step 5: After boarding is completed, the ship ladder (2) begins to retract, during which the inspection robot (4) locks the lubricated articulated frame (22) and analyzes the retracted state to determine whether maintenance is required.

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