Anti-loose detection device for steel wire rope of crane

Abstract

The utility model discloses a crane steel wire rope anti-loosening detection device which comprises a hanging plate, a pulley, a steel wire rope, a fixing cylinder, a sliding rod, a mounting plate, a guide wheel, a sliding block, a spring, a rack, a rotating shaft, a gear and a light reflecting plate. A guide wheel is arranged in the mounting plate to guide the steel wire rope to vertically pass through, sliding blocks are arranged at the deviating ends of the sliding rods, located on the two sides of the limiting convex ring of the fixing cylinder and pushed to be close by springs, and racks are arranged on the outer sides of the sliding blocks and meshed with gears on the rotating shafts to drive the reflector to turn over for warning; according to the device, local looseness of the steel wire rope at the pulley can be detected in time, infinitesimal displacement signals are amplified through structure limiting and gear transmission, visual warning is provided through the light reflecting plate, and the detection sensitivity and the operation safety are effectively improved.

Description

Technical Field

[0001] This utility model belongs to the field of crane safety inspection technology, specifically relating to a crane wire rope anti-loosening detection device. Background Technology

[0002] During the operation of lifting equipment, the wire rope, as a key component for bearing and transmitting force, directly affects the safety and stability of lifting operations. Especially in scenarios involving repeated lifting and frequent hoisting, the wire rope may loosen between itself and the pulleys due to wear, slippage, or changes in the winding angle, leading to equipment instability or even hoisting accidents. Therefore, real-time monitoring of the wire rope's slack status is of great importance during crane operations.

[0003] Existing crane wire rope monitoring devices mostly rely on tension sensors or photoelectric switches, typically installed between the wire rope and the drum. They primarily monitor overall tension changes but struggle to sensitively detect localized loosening at the pulley ends. Especially in structures with multiple pulleys connected in parallel at certain lifting points, even when the wire rope is taut, slight bulges or outward deformations may appear at the pulley locations, which traditional devices cannot effectively identify. Furthermore, some existing solutions are complex in structure, difficult to debug, and lack intuitive alarm feedback mechanisms, hindering rapid judgment and response by on-site personnel. Utility Model Content

[0004] To address the problems existing in the prior art, the purpose of this utility model is to provide a crane wire rope anti-loosening detection device. This device is applicable to different pulley sizes and has a visual warning function, thereby improving the safety level of lifting operations.

[0005] To achieve the above objectives, this utility model provides the following technical solution: a crane wire rope anti-loosening detection device, including a hanging plate, a pulley rotatably installed inside the hanging plate, a wire rope passing through the surface of the pulley, a fixed cylinder installed on the top of the hanging plate, the fixed cylinder being horizontally placed between the two ends of the wire rope, and sliding rods slidingly passing through both ends of the fixed cylinder;

[0006] Each of the two sliding rods has a mounting plate at one end facing away from each other. The mounting plate is placed outside the fixed cylinder. Two guide wheels are rotatably mounted inside the mounting plate. The steel wire rope passes vertically between the two guide wheels.

[0007] The fixed cylinder is symmetrically and vertically mounted with a rotating shaft on its back. A reflector is provided on the top of the rotating shaft. The rotating shaft flips as the slide bar slides to serve as a warning.

[0008] Furthermore, both ends of the fixed cylinder are equipped with sealing caps, the slide rod passes through the sealing caps, the slide rod surface is symmetrically provided with raised strips, and the sealing cap surface is provided with grooves that are compatible with the raised strips.

[0009] Furthermore, a limiting protrusion is provided at the center of the inside of the fixed cylinder, and a slider is screwed onto the end of the slide rod away from the mounting plate, with the two sliders respectively placed on both sides of the limiting protrusion.

[0010] Furthermore, a spring is sleeved on the surface of the slide rod, and two springs are respectively placed inside the fixed cylinder. The two springs respectively apply a push to the two sliders in the direction of the limiting protrusion ring.

[0011] Furthermore, an open groove is symmetrically and laterally opened on one side of the fixed cylinder, and a rack is fixed on one side of the slider surface, and the rack slides inside the open groove.

[0012] Furthermore, a fixing plate is symmetrically welded to one side of the fixing cylinder, the fixing plate is placed below the open slide groove, and the rotating shaft rotates vertically on the surface of the fixing plate.

[0013] Furthermore, a gear is mounted on the surface of the rotating shaft, and the gear meshes with the rack.

[0014] Compared with the prior art, the beneficial effects of this utility model are:

[0015] This utility model achieves spatial constraint on the running state of the wire rope by setting a fixed cylinder on the top of the hanging plate and using the structure of the sliding rod and the mounting plate. It effectively improves the ability to identify the local deformation of the wire rope when it is slightly "outwardly supported" or loose at the pulley, and makes up for the problem that the existing technology can only monitor the overall tension and is difficult to identify local deformation.

[0016] This utility model improves the accuracy of limit detection by setting symmetrical guide wheels in the mounting plate to ensure that the wire rope always passes vertically in the device. At the same time, the combined threaded connection structure of the slide bar and the slider allows the device to adapt to pulleys of different sizes, improving the device's versatility and adaptability, and avoiding the impact on detection results due to improper installation caused by differences in pulley models.

[0017] This invention sets a limiting protrusion ring inside the fixed cylinder and applies a centripetal thrust to the slider through a spring, ensuring that the device maintains its initial position when the wire rope is not slack, thereby improving the reset capability and detection sensitivity of the detection device and solving the problems of complex structure and difficult debugging in the prior art.

[0018] This invention features a rack on the outside of the slider that meshes with a gear on the rotating shaft. This allows the outward movement caused by the loosening of the wire rope to be converted into gear rotation in real time, which in turn drives the rotating shaft to rotate, causing the reflector to flip to the warning state and providing an intuitive and visual safety warning. This overcomes the technical shortcoming of traditional devices that lack a significant alarm feedback mechanism. Attached Figure Description

[0019] Figure 1 This is a schematic diagram of the installation three-dimensional structure of this utility model;

[0020] Figure 2 This is a schematic diagram of the detection device of this utility model;

[0021] Figure 3 This is a schematic diagram of the fixed cylinder structure of this utility model;

[0022] Figure 4 This is a cross-sectional structural diagram of the detection device of this utility model;

[0023] Figure 5 This is a schematic diagram of the reflector position structure when the wire rope is tilted outward according to this utility model;

[0024] Figure 6 This is a schematic diagram of the gear and rack mating structure of this utility model.

[0025] The components represented by each number in the attached diagram are listed below: 1. Hanging plate; 11. Pulley; 2. Wire rope; 3. Fixing cylinder; 31. Sealing cover; 32. Limiting protrusion ring; 33. Open slide groove; 34. Fixing plate; 4. Slide rod; 41. Protrusion; 42. Mounting plate; 43. Slider; 431. Rack; 5. Guide wheel; 6. Spring; 7. Rotating shaft; 71. Gear; 8. Reflector. Detailed Implementation

[0026] To make the objectives and advantages of this utility model clearer, the following detailed description is provided in conjunction with embodiments. It should be understood that the following text is merely used to describe one or more specific embodiments of this utility model and does not strictly limit the scope of protection specifically claimed by this utility model.

[0027] refer to Figures 1-6As shown, a crane wire rope anti-loosening detection device includes a lifting plate 1, with a pulley 11 rotatably installed inside the lifting plate 1. The pulley 11 is located at the center of the lifting plate 1 and is used to guide the wire rope 2 to run along a predetermined path. The pulley 11 has mounting grooves on both sides to cooperate with the wire rope 2 to stably embed into the running trajectory. The wire rope 2 passes through the surface of the pulley 11 and is used to bear the lifting load and transmit tension. A fixed cylinder 3 is installed on the top of the lifting plate 1. The fixed cylinder 3 is rigidly connected to the lifting plate 1 by bolts, so that the fixed cylinder 3 and the lifting plate 1 maintain a synchronous lifting state during the lifting process. The fixed cylinder 3 is horizontally placed between the two ends of the wire rope 2 and is used to limit and monitor the external deformation of the wire rope 2. Both ends of the fixed cylinder 3 have horizontally sliding sliding rods 4 that can slide back and forth in the horizontal direction inside the fixed cylinder 3 to transmit external deformation signals.

[0028] Each of the two sliding rods 4 has a mounting plate 42 at one of its opposite ends. The mounting plate 42 is fixedly connected to the sliding rod 4 by threads and can be adjusted horizontally according to the size of different pulleys 11 to ensure that the wire rope 2 passes vertically through the guide mechanism. The mounting plate 42 is placed outside the fixed cylinder 3 and has two guide wheels 5 rotatably mounted on it through the inner shaft hole. The guide wheels 5 are arranged symmetrically to guide the wire rope 2 through vertically and maintain its tension. The guide wheels 5 adopt a wear-resistant rubber-coated metal wheel core structure to improve guiding performance and extend service life. The wire rope 2 passes vertically between the two guide wheels 5. When the pulley 11 becomes loose and causes the wire rope 2 to bulge outward, the mounting plate 42 can move outward synchronously under the action of the sliding rod 4.

[0029] A rotating shaft 7 is symmetrically and vertically mounted on the back of the fixed cylinder 3. The rotating shaft 7 is made of high-strength steel and has an anti-rust coating to ensure stability during long-term operation. A reflector 8 is installed on the top of the rotating shaft 7. The reflector 8 is fixed to the top end of the rotating shaft 7 by bolts. When the rotating shaft 7 rotates, it flips to form a visual warning signal. The rotating shaft 7 flips as the sliding rod 4 slides to serve as a warning. When the steel wire rope 2 and the pulley 11 are deformed by external support, the sliding rod 4 moves outward, causing the slider 43 to move, which in turn drives the gear 71 to rotate and drive the rotating shaft 7 to move. This causes the reflector 8 to rotate from its initial tilted state to a visible state parallel to the hanging plate 1, which is used to warn workers to check for potential safety hazards in a timely manner.

[0030] refer to Figure 2 and Figure 5As shown, both ends of the fixed cylinder 3 are equipped with sealing caps 31. The sealing caps 31 adopt a sealing gasket and threaded nesting structure to ensure the sealing and protection effect of the device during the lifting process. The slide rod 4 passes through the sealing cap 31, and its sliding freedom is limited by the cooperation of the groove and the ridge. The slide rod 4 is symmetrically provided with ridges 41. The ridges 41 are used to limit the rotational freedom of the slide rod 4 and keep the installation angle of the mounting plate 42 stable. The sealing cap 31 has a groove that matches the ridge 41. The groove and the ridge are interference fit to prevent the slide rod 4 from twisting and shifting during operation and to avoid squeezing damage to the wire rope 2.

[0031] refer to Figure 4 As shown, a limiting protrusion ring 32 is provided at the center of the fixed cylinder 3. The limiting protrusion ring 32 is a ring structure and is welded and fixed along the inner wall of the cylinder to form the central limiting reference point of the slider 43. The slider 43 is screwed onto the end of the slide rod 4 away from the mounting plate 42. The slider 43 is a cylindrical hollow structure with a threaded hole inside that is tightly fitted with the external thread of the slide rod 4. The two sliders 43 are respectively placed on both sides of the limiting protrusion ring 32. Under the action of the spring 6, they move towards the central limiting protrusion ring 32 to form the initial limiting state.

[0032] refer to Figure 4 and Figure 6 As shown, a spring 6 is sleeved on the surface of the slide rod 4. The spring 6 is located between the slide rod 4 and the inner wall of the fixed cylinder 3 to form an axial elastic return mechanism. Two springs 6 are respectively placed inside the fixed cylinder 3, corresponding to the positions of the two sliders 43, so as to apply a constant centripetal thrust to the sliders 43. The two springs 6 respectively apply a push to the two sliders 43 in the direction of the limiting protrusion ring 32 to ensure that the device always remains in the reset state when the wire rope 2 is not deformed.

[0033] refer to Figure 3 and Figure 5 As shown, an open groove 33 is symmetrically and laterally opened on one side of the fixed cylinder 3. The open groove 33 is a strip-shaped through hole structure, which is used to provide an external transmission path for the rack 431 on the slider 43. A rack 431 is fixed on one side of the surface of the slider 43. The rack 431 is an integrally formed structure, and its tooth surface extends along the direction of the open groove 33. The rack 431 slides inside the open groove 33 and forms a stable meshing relationship with the gear 71. When the slider 43 is displaced, it drives the gear 71 to rotate to trigger the warning mechanism.

[0034] refer to Figure 2 As shown, a fixing plate 34 is symmetrically welded on one side of the fixing cylinder 3. The fixing plate 34 adopts an L-shaped structure and is vertically connected to the outside of the cylinder. The fixing plate 34 is placed below the open slide groove 33 to provide a mounting base for the rotating shaft 7. The rotating shaft 7 rotates vertically on the surface of the fixing plate 34. The rotation accuracy and response speed are improved by the bearing assembly, and the flipping action of the reflector 8 is completed during the movement of the slider 43.

[0035] refer to Figure 5 and Figure 6 As shown, a gear 71 is mounted on the surface of the rotating shaft 7, and the gear 71 meshes with the rack 431. The gear 71 has a precision-machined tooth profile and is fixedly connected to the rotating shaft 7 by a pin. The gear 71 rotates under the axial movement of the rack 431, thereby driving the rotating shaft 7 to rotate around the vertical axis, realizing a significant change in the state of the reflector 8, and providing a clear visual signal for the detection of wire rope loosening.

[0036] The working principle of this utility model is as follows: First, the fixed cylinder 3 is fixed to the top of the hanging plate 1 with bolts, so that the fixed cylinder 3 is lifted together with the hanging plate 1. Due to the thrust of the spring 6, the end faces of the two sliders 43 are respectively in contact with the two sides of the limiting protrusion ring 32, and the two ends of the wire rope 2 pass through the mounting plate 42 and are placed between the two guide wheels 5 to maintain the stability of the initial state. At this time, the reflector 8 is flipped to one side, and the slider 43 and the sliding rod 4 are connected by threads to adjust the position of the mounting plate 42 when the slider 43 is placed at the innermost side, so as to adapt to the detection work of pulleys 11 of different sizes. The distance adjustment should ensure that the wire rope 2 is in a vertical state when lifted, the slider 43 is placed at the innermost side of the fixed cylinder 3, and the protrusion 41 can ensure the angle of the mounting plate 42 to prevent the rotation from squeezing the wire rope 2.

[0037] During operation, if the wire rope 2 becomes loose between the wire rope 2 and the pulley 11, the wire rope 2 cannot deform inward due to the limitation of the mounting plate 42. However, if it deforms outward, it can drive the mounting plate 42 to move outward, which in turn drives the slider 43 to move outward through the slide rod 4. This causes the rack 431 to move outward along the trajectory of the open slide groove 33. The meshing of the rack 431 and the gear 71 drives the rotating shaft 7 to rotate, thereby rotating the reflector 8 to a state parallel to the hanging plate 1 to warn the workers.

[0038] The above description is merely a preferred embodiment of this utility model. It should be noted that those skilled in the art can make various improvements and modifications without departing from the principle of this utility model, and these improvements and modifications should also be considered within the scope of protection of this utility model. Structures, devices, and operating methods not specifically described or explained in this utility model, unless otherwise specified or limited, shall be implemented using conventional methods in the field.

Claims

1. A crane wire rope anti-loosening detection device, comprising a lifting plate (1), wherein a pulley (11) is rotatably mounted inside the lifting plate (1), and a wire rope (2) passes through the surface of the pulley (11), characterized in that: The top of the hanging plate (1) is equipped with a fixing cylinder (3), which is horizontally placed between the two ends of the wire rope (2). Both ends of the fixing cylinder (3) are slidably traversed by sliding rods (4). Each of the two sliding rods (4) is provided with a mounting plate (42) at one end facing away from each other. The mounting plate (42) is placed outside the fixed cylinder (3). Two guide wheels (5) are rotatably installed inside the mounting plate (42). The wire rope (2) passes vertically between the two guide wheels (5). The fixed cylinder (3) has a rotating shaft (7) mounted symmetrically and vertically on its back. A reflector (8) is provided on the top of the rotating shaft (7). The rotating shaft (7) flips as the slide bar (4) slides to serve as a warning.

2. The crane wire rope anti-loosening detection device according to claim 1, characterized in that: Both ends of the fixed cylinder (3) are equipped with sealing caps (31), the slide rod (4) passes through the sealing cap (31), the slide rod (4) is symmetrically provided with protrusions (41), and the sealing cap (31) is provided with grooves that are compatible with the protrusions (41).

3. The crane wire rope anti-loosening detection device according to claim 1, characterized in that: The fixed cylinder (3) has a limiting protrusion ring (32) at its center. The slide rod (4) has a slider (43) screwed onto one end away from the mounting plate (42). The two sliders (43) are respectively placed on both sides of the limiting protrusion ring (32).

4. The crane wire rope anti-loosening detection device according to claim 3, characterized in that: The slide bar (4) is fitted with a spring (6), and the two springs (6) are respectively placed inside the fixed cylinder (3). The two springs (6) respectively push the two sliders (43) in the direction of the limiting protrusion (32).

5. The crane wire rope anti-loosening detection device according to claim 3, characterized in that: The fixed cylinder (3) has an open groove (33) symmetrically opened on one side, and a rack (431) is fixed on one side of the surface of the slider (43), and the rack (431) slides inside the open groove (33).

6. The crane wire rope anti-loosening detection device according to claim 5, characterized in that: A fixing plate (34) is symmetrically welded on one side of the fixing cylinder (3). The fixing plate (34) is placed below the open slide groove (33). The rotating shaft (7) rotates vertically on the surface of the fixing plate (34).

7. The crane wire rope anti-loosening detection device according to claim 6, characterized in that: A gear (71) is mounted on the surface of the rotating shaft (7), and the gear (71) meshes with the rack (431).

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