Marine crane with pulley abrasion reducing structure

Abstract

The utility model discloses a marine crane with a pulley wear reducing structure, which comprises a crane body for hoisting and transferring an object, and a fixed pulley block for guiding a steel wire rope in the hoisting process is arranged on the crane body. The fixed pulley block is provided with a rope falling prevention assembly which is used for limiting a steel wire rope in a certain direction and can play a role in early warning, and the fixed pulley block is provided with a pulley body; the fixed pulley block is provided with an anti-abrasion assembly which is used for buffering the pulley body in a certain direction and preventing the pulley body from deviating in the certain direction. The pulley not only effectively avoids the situation that the pulley body and the steel wire rope are abnormally abraded due to deviation of the pulley body, prolongs the service life of the steel wire rope and the pulley body, but also effectively avoids the situation that the steel wire rope is separated from the pulley body to cause safety accidents, and improves safety.

Description

Technical Field

[0001] This utility model relates to the field of marine crane technology, specifically a marine crane with a structure that reduces pulley wear. Background Technology

[0002] In the modern shipping industry, marine cranes, as key loading and unloading equipment, play an indispensable role in ensuring the efficient transfer of goods. Their working environment is complex and harsh, facing many challenges such as turbulent waves, sea wind erosion, and mechanical wear and tear caused by high-intensity operations. Among these challenges, the operating condition of the pulley system has a particularly significant impact on the overall performance of the crane.

[0003] A search revealed that patent publication number CN217102819U discloses a marine crane with wave-adaptive function, relating to the field of marine crane technology. This marine crane with wave-adaptive function includes a base, a rotating platform, a fixed seat, a boom, and a hook. Movable boxes are fixedly connected to both sides of the boom. Support arms are hinged to both sides of the rotating platform. A slider is slidably connected inside each movable box, and a fixed rod is fixedly connected inside the movable box. Two limiting rails are fixedly connected to the bottom of the rotating platform. A lead screw is rotatably connected inside each limiting rail, and a positioning block is connected to the outside of the lead screw via a through-nut pair. A moving block is slidably connected inside each limiting rail, and a second spring is fixedly connected to both sides of each moving block. A support rod is hinged to one side of each moving block. This marine crane with wave-adaptive function is advantageous for adapting to different sea surface environments, is easy to adjust, and has strong adaptability.

[0004] When existing marine cranes lift cargo, the wire rope, as the main load-bearing and transmission component, needs to frequently change the direction of force through fixed pulleys. During this process, due to the weight of the cargo and the dynamic load during lifting, the wire rope exerts a significant force on the fixed pulley. This force not only subjectes the fixed pulley to enormous radial pressure, but also, over time, can easily lead to pulley misalignment. Once the fixed pulley misaligns, it disrupts the ideal fit between it and the wire rope. On the one hand, it exacerbates localized wear between the pulley and the wire rope, resulting in uneven thickness of the pulley groove wall, reducing the pulley's service life, and increasing equipment maintenance costs and downtime. On the other hand, this misalignment may also cause vibration and noise during the operation of the pulley, affecting the stability of the crane's operation and even interfering with the working environment of surrounding operators.

[0005] Meanwhile, when the wire rope is being wound up and down by the winch, it is easy for it to come off the pulley groove of the fixed pulley during the winch process, which is called rope detachment. Once rope detachment occurs, it will directly lead to the interruption of cargo hoisting, and in severe cases, it may cause major safety accidents such as cargo falling. This not only endangers the lives of the crew, but also causes serious property damage to the ship and surrounding facilities. In addition, the detached wire rope may become entangled on other parts of the crane, causing secondary damage to the equipment. The repair work is complicated and time-consuming, which greatly affects the operating efficiency of the ship. Therefore, a marine crane with a structure that reduces pulley wear is designed. Utility Model Content

[0006] In view of the defects or deficiencies of marine cranes, the purpose of this utility model is to provide a marine crane with a structure that reduces pulley wear. This not only effectively avoids abnormal wear between the pulley body and the wire rope caused by pulley body misalignment, but also effectively prevents the wire rope from coming off the pulley body and causing safety accidents.

[0007] To achieve the above-mentioned objectives, the present invention adopts the following technical solution:

[0008] This utility model provides a marine crane with a structure to reduce pulley wear, including a crane body for lifting and transferring objects. The crane body is provided with a fixed pulley group for guiding the wire rope during winding. The fixed pulley group is provided with an anti-derailment component for limiting the wire rope in a certain direction and providing early warning. The fixed pulley group is provided with a pulley body, and the fixed pulley group is provided with an anti-wear component for buffering the pulley body in a certain direction and preventing the pulley body from deviating in a certain direction.

[0009] Preferably, the pulley body is disposed on the inner side of the U-shaped mounting plate, and the connecting shafts on both end walls of the pulley body are respectively installed in bearings on the outer walls of both sides of the U-shaped mounting plate.

[0010] Preferably, the anti-rope assembly is provided with two second L-shaped connecting plates, and the two second L-shaped connecting plates are respectively installed on the outer walls of the two sides of the U-shaped mounting plate. A pressure detection sensor is installed on one end of the inner side of the second L-shaped connecting plate.

[0011] Preferably, the pressure detection sensor is connected to the buffer shock absorber through the first mounting plate, and the other end of the buffer shock absorber is installed on the inner end of the first L-shaped connecting plate. The first L-shaped connecting plates are connected to each other by limiting rods, and both ends of the limiting rods are provided with fastening nuts.

[0012] Preferably, the anti-wear component is provided with a second mounting plate, and one outer wall of the second mounting plate is connected to the first mounting plate through a damping cylinder. A spring is provided on the outer side of the outer wall of the damping cylinder, and the spring is located between the first mounting plate and the second mounting plate. Both the first mounting plate and the second mounting plate are located on the outer side of the outer wall of the connecting shaft on the pulley body.

[0013] Preferably, an arc-shaped slider is installed on the outer side of the other side of the second mounting plate, and the other end of the arc-shaped slider is disposed on a hollow annular slide rail, and the arc-shaped slider and the hollow annular slide rail are slidably connected. The hollow annular slide rail is installed on the inner side wall of the U-shaped mounting plate, and the third mounting plate is installed on the outer wall of the pulley body.

[0014] Compared with existing technologies, one or more of the above technical solutions have the following beneficial effects:

[0015] 1. In this utility model, through a series of coordinated structural arrangements, when the crane body is lifting goods and the wire rope exerts a certain radial force on the pulley body, the damping cylinder, spring and other structures on the anti-wear component can play a buffering role, reducing the instantaneous force on the pulley body, thereby avoiding the abnormal wear of the pulley body and wire rope caused by the pulley body shifting due to the large force, and extending the service life of the wire rope and the pulley body.

[0016] 2. In this utility model, through a series of coordinated structural arrangements, when the wire rope comes off the pulley groove on the pulley body during the hoisting process, the limiting rod on the anti-derailment component will limit and block the wire rope, preventing the wire rope from coming off the pulley body and causing a safety accident. When the wire rope frequently generates a certain force with the limiting rod, the pressure detection sensor can detect the force generated between the wire rope and the limiting rod. When the pressure detection sensor frequently detects a certain force between the wire rope and the limiting rod, or when the force generated between the wire rope and the limiting rod exceeds the preset force data value range, the microcontroller in the control box on the crane body will control the audible and visual alarm on the crane body to issue an audible and visual alarm, giving a warning to the staff to remind them to carry out maintenance operations in time, preventing subsequent wire rope breakage or derailment, avoiding safety accidents such as falling goods, and improving safety. Attached Figure Description

[0017] The accompanying drawings, which form part of this specification, are used to provide a further understanding of this utility model. The illustrative embodiments of this utility model and their descriptions are used to explain this utility model and do not constitute an improper limitation of this utility model.

[0018] Figure 1This is a schematic diagram of the overall three-dimensional structure of this utility model.

[0019] Figure 2 This is a schematic diagram of the structure of the fixed pulley block of this utility model.

[0020] Figure 3 This is a schematic diagram of the internal structure of the fixed pulley block of this utility model.

[0021] Figure 4 This is a schematic diagram of the structure of the anti-wear component of this utility model. Figure 1 .

[0022] Figure 5 This is a schematic diagram of the structure of the anti-wear component of this utility model. Figure 2 .

[0023] Figure 6 This is a structural schematic diagram of the anti-rope detachment component of this utility model.

[0024] In the picture:

[0025] Crane body;

[0026] Fixed pulley block; 111, U-shaped mounting plate; 112, anti-rope slippage assembly; 113, pulley body; 114, anti-wear assembly;

[0027] 1122. First L-shaped connecting plate; 1123. Pressure sensor; 1124. Second L-shaped connecting plate; 1125. Limiting rod; 1126. First mounting plate; 1127. Shock absorber;

[0028] 1141. Arc-shaped slider; 1142. Hollow annular slide rail; 1143. Second mounting plate; 1144. Spring; 1145. Damping cylinder; 1146. Third mounting plate. Detailed Implementation

[0029] The present invention will be further described below with reference to the accompanying drawings and embodiments.

[0030] It should be noted that the following detailed description is exemplary and intended to provide further explanation of the present invention. Unless otherwise specified, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this invention pertains.

[0031] It should be noted that the terminology used herein is for the purpose of describing particular embodiments only and is not intended to limit the scope of exemplary embodiments according to the invention. As used herein, the singular form is intended to include the plural form as well, unless the context clearly indicates otherwise. Furthermore, it should be understood that when the terms "comprising" and / or "including" are used in this specification, they indicate the presence of features, steps, operations, devices, components, and / or combinations thereof.

[0032] like Figure 1-6 As shown, a marine crane with a structure to reduce pulley wear includes a crane body 100 for lifting and transferring objects. The crane body 100 is provided with a fixed pulley group 110 for guiding the wire rope during winding. The fixed pulley group 110 is provided with an anti-derailment component 112 for limiting the wire rope in a certain direction and providing early warning. The fixed pulley group 110 is provided with a pulley body 113. The fixed pulley group 110 is provided with an anti-wear component 114 for buffering the pulley body 113 in a certain direction and preventing the pulley body 113 from deviating in a certain direction.

[0033] The pulley body 113 is located inside the U-shaped mounting plate 111, and the connecting shafts on both ends of the pulley body 113 are respectively installed in the bearings on the outer walls of both sides of the U-shaped mounting plate 111.

[0034] The anti-rope detachment assembly 112 is provided with two second L-shaped connecting plates 1123, and the two second L-shaped connecting plates 1123 are respectively installed on the outer walls of the two sides of the U-shaped mounting plate 111. A pressure detection sensor 1122 is installed on one end of the inner side of the second L-shaped connecting plate 1123. The crane body 100 is provided with a control box and an audible and visual alarm. The control box is equipped with an A / D conversion module and a microcontroller. The pressure data value detected by the pressure detection sensor 1122 is transmitted to the microcontroller through the A / D conversion module. The microcontroller controls the audible and visual alarm. The output end of the pressure detection sensor 1122 is electrically connected to the input end of the A / D conversion module. The output end of the A / D conversion module is electrically connected to the input end of the microcontroller. The output end of the microcontroller is electrically connected to the input end of the audible and visual alarm.

[0035] The pressure detection sensor 1122 is connected to the buffer damper 1126 via the first mounting plate 1125, and the other end of the buffer damper 1126 is installed on the inner side of the first L-shaped connecting plate 1121. The first L-shaped connecting plates 1121 are connected to each other by a limiting rod 1124, and both ends of the limiting rod 1124 are provided with fastening nuts. The buffer damper 1126 can buffer the force generated between the wire rope and the limiting rod 1124, reduce the instantaneous force on the limiting rod 1124, and prevent the limiting rod 1124 from bending or even breaking due to excessive force, thus preventing the wire rope from coming off and improving safety.

[0036] The anti-wear component 114 is provided with a second mounting plate 1143. One outer wall of the second mounting plate 1143 is connected to the first mounting plate 1125 through a damping cylinder 1145. A spring 1144 is provided on the outer side of the outer wall of the damping cylinder 1145, and the spring 1144 is located between the first mounting plate 1125 and the second mounting plate 1143. Both the first mounting plate 1125 and the second mounting plate 1143 are located on the outer side of the connecting shaft on the pulley body 113.

[0037] An arc-shaped slider 1141 is mounted on the outer side of the second mounting plate 1143. The other end of the arc-shaped slider 1141 is set on the hollow annular slide rail 1142, and the arc-shaped slider 1141 and the hollow annular slide rail 1142 are slidably connected. The hollow annular slide rail 1142 is mounted on the inner wall of the U-shaped mounting plate 111. The third mounting plate 1146 is mounted on the outer wall of the pulley body 113. The arrangement of the arc-shaped slider 1141 and the hollow annular slide rail 1142 can limit and guide the rotation of the anti-wear component 114.

[0038] Working Principle: During operation, when the crane body 100 is lifting goods, the wire rope exerts a certain radial force on the pulley body 113. The damping cylinder 1145 and spring 1144 on the anti-wear component 114 work together to buffer the impact, reducing the instantaneous force on the pulley body 113. This prevents the pulley body 113 from shifting due to excessive force, thus avoiding abnormal wear between the pulley body 113 and the wire rope, extending the service life of both the wire rope and the pulley body 113. When the wire rope comes out of the pulley groove on the pulley body 113 during winch operation, the limiting rod 1124 on the anti-derailment component 112 will limit and block the wire rope, preventing it from coming out of the pulley body 113. In case of a safety accident caused by the wire rope, when the wire rope frequently exerts a certain force on the limit rod 1124, the pressure detection sensor 1122 can detect the force generated between the wire rope and the limit rod 1124. When the pressure detection sensor 1122 frequently detects a certain force between the wire rope and the limit rod 1124, or when the force generated between the wire rope and the limit rod 1124 exceeds the preset force data value range, the microcontroller in the control box on the crane body 100 will control the audible and visual alarm on the crane body 100 to issue an audible and visual alarm, giving a warning to the staff to remind them to carry out maintenance operations in a timely manner, preventing subsequent wire rope breakage or detachment, avoiding safety accidents such as falling goods, and improving safety.

[0039] The above description is merely a preferred embodiment of this utility model and is not intended to limit the invention. For those skilled in the art, various modifications and variations can be made to this invention. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of this invention should be included within the protection scope of this invention.

Claims

1. A marine crane with a structure for reducing pulley wear, comprising a crane body (100) for lifting and transferring objects, characterized in that: The crane body (100) is provided with a fixed pulley group (110) for guiding the wire rope during the winding process. The fixed pulley group (110) is provided with an anti-derailment component (112) for limiting the wire rope in a certain direction and providing early warning. The fixed pulley group (110) is provided with a pulley body (113). The fixed pulley group (110) is provided with an anti-wear component (114) for buffering the pulley body (113) in a certain direction and preventing the pulley body (113) from deviating in a certain direction.

2. The marine crane with a pulley wear reduction structure according to claim 1, characterized in that: The pulley body (113) is located inside the U-shaped mounting plate (111), and the connecting shafts on both ends of the pulley body (113) are respectively installed in the bearings on the outer walls of both sides of the U-shaped mounting plate (111).

3. The marine crane with a pulley wear reduction structure according to claim 1, characterized in that: The anti-rope assembly (112) is provided with two second L-shaped connecting plates (1123), and the two second L-shaped connecting plates (1123) are respectively installed on the outer walls of the two sides of the U-shaped mounting plate (111). A pressure detection sensor (1122) is installed on one end of the inner side of the second L-shaped connecting plate (1123).

4. The marine crane with a pulley wear reduction structure according to claim 3, characterized in that: The pressure detection sensor (1122) is connected to the buffer shock absorber (1126) through the first mounting plate (1125), and the other end of the buffer shock absorber (1126) is installed on the inner side of the first L-shaped connecting plate (1121). The first L-shaped connecting plates (1121) are connected to each other through the limiting rod (1124), and both ends of the limiting rod (1124) are provided with fastening nuts.

5. The marine crane with a pulley wear reduction structure according to claim 1, characterized in that: The wear-resistant component (114) is provided with a second mounting plate (1143). One side of the outer wall of the second mounting plate (1143) is connected to the first mounting plate (1125) through a damping cylinder (1145). A spring (1144) is provided on the outer side of the outer wall of the damping cylinder (1145), and the spring (1144) is located between the first mounting plate (1125) and the second mounting plate (1143). The first mounting plate (1125) and the second mounting plate (1143) are both located on the outer side of the connecting shaft on the pulley body (113).

6. The marine crane with a pulley wear reduction structure according to claim 5, characterized in that: An arc-shaped slider (1141) is mounted on the outer side of the second mounting plate (1143). The other end of the arc-shaped slider (1141) is set on the hollow annular slide rail (1142), and the arc-shaped slider (1141) and the hollow annular slide rail (1142) are slidably connected. The hollow annular slide rail (1142) is mounted on the inner wall of the U-shaped mounting plate (111), and the third mounting plate (1146) is mounted on the outer wall of the pulley body (113).

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