Automatic lifting appliance grabbing device for crane

Abstract

The invention relates to the field of cranes, in particular to an automatic grabbing lifting appliance device for a crane, which comprises a lifting frame, a distance adjusting mechanism is fixedly connected to the bottom of the lifting frame, two telescopic frames in bilateral symmetry are mounted at two ends of the distance adjusting mechanism, lifting rods are mounted on the outer sides of the telescopic frames, and the telescopic frames adjust the distance between the lifting rods according to the length of a lifted pipe. Two vibrating mechanisms are mounted at the bottom of the lifting rod, the two vibrating mechanisms are symmetrically arranged left and right, inner supporting mechanisms are mounted on the inner sides of the vibrating mechanisms, the inner supporting mechanisms extend outwards to support and fix a pipe, the vibrating mechanisms can enable the pipe to vibrate while rotating, dirt on the inner wall of the pipe is vibrated off, and accurate grabbing of the pipes with different lengths is achieved; the adaptive range of the lifting appliance to pipes of various specifications is greatly widened, automatic grabbing of the pipes is achieved, manual auxiliary operation is reduced, the labor cost is saved, and the safety and efficiency of lifting operation are improved.

Description

Technical Field

[0001] The present invention relates to the technical field of cranes, in particular to an automatic grabbing sling device for cranes. Background Art

[0002] In industrial production, construction, logistics and transportation, lifting operations often require the grabbing, transfer and subsequent processing of large pipes. As the key connection between the lifting machinery and the objects being lifted, the performance of the sling directly affects the efficiency and safety of the operation. Currently, commonly used slings are mainly divided into two types: hook type and electromagnetic type. However, when it comes to the grabbing and transfer of large pipes, existing slings have many limitations: 1. When lifting large pipes with hook-type slings, it is necessary to manually adjust the connection position between the hook and the pipe, which is not only time-consuming and labor-intensive, but may also cause the pipe to be hung unstable due to manual operation errors, posing a safety hazard of shaking or even falling, increasing the risk of operation.

[0003] 2. Large pipes vary greatly in length and inner diameter. Traditional spreaders have a fixed structure and cannot flexibly adjust the grabbing spacing or support range. They are difficult to adapt to pipes of different specifications, resulting in a limited operating range.

[0004] 3. During the storage or use of large pipes, dust, rust and other impurities are easily attached to the inner wall. If not cleaned in time, the impurities will gradually corrode the inner wall of the pipe, reducing the structural strength and service life of the pipe. The existing spreaders can only realize the grabbing and transportation functions, and cannot simultaneously complete the cleaning of the inner wall of the pipe. Additional cleaning equipment is required, which increases the operation process and cost. Summary of the Invention

[0005] The purpose of the embodiments of the present invention is to provide an automatic grabbing sling device for a crane to solve the problems raised in the above background technology that the device cannot automatically grab pipes of various sizes, does not have a debris removal function, and affects the service life of the pipes.

[0006] To achieve the above-mentioned objectives, an embodiment of the present invention provides the following technical solutions: an automatic grabbing sling device for a crane, comprising a hanger, a distance-adjusting mechanism fixedly connected to the bottom of the hanger, two telescopic frames symmetrically mounted at both ends of the distance-adjusting mechanism, a boom mounted on the outside of the telescopic frame, the telescopic frame adjusting the boom spacing according to the length of the lifted pipe, a vibration mechanism mounted on the bottom of the boom, the two vibration mechanisms being symmetrically arranged, an inner support mechanism mounted on the inner side of the vibration mechanism, the inner support mechanism extending outward to support and fix the pipe, and the vibration mechanism can vibrate the pipe while rotating, thereby shaking off dirt on the inner wall of the pipe.

[0007] As a further solution of the present invention, the distance adjusting mechanism includes a support plate fixedly connected to the bottom of the hanger, and the left and right sides of the support plate are slidably connected with slides, and the outer side of the slide is installed on the inner side of the telescopic frame, and a first motor is installed at the center position of the lower surface of the support plate, and a traction rod is installed at the output end of the first motor, and both ends of the traction rod are connected to one end of the first connecting rod through a pin shaft, and the other end of the first connecting rod is connected to the middle part of the upper surface of the slide through a pin shaft, and the traction rod is driven by the first motor to rotate clockwise or counterclockwise, so that the first connecting rod pulls the two slides to move inward or outward at the same time; so that the internal support mechanism can enter the inner cavity of the pipe from both ends to avoid the pipe from shaking left and right during transportation.

[0008] As a further solution of the present invention, the vibration mechanism includes a box body installed at the bottom of the boom, a rotating shaft is installed at the bottom of the inner cavity of the box body through a bearing, the outer wall key of the rotating shaft is connected to a driven gear, a second motor is installed on the top of the left side wall of the box body, and the output end of the second motor is respectively installed with a driving gear and a swinging assembly from left to right, the driving gear is meshed with the driven gear, and the transmission ratio is greater than 10, so that a speed difference is generated between the rotating shaft and the swinging assembly, and the centrifugal force generated when the swinging assembly rotates causes the box body to vibrate, and then the pipe is vibrated, and at the same time, the pipe is rotated, and a cleaning assembly is installed at the bottom inside the box body; not only can the pipe be rotated at low speed, but the swinging assembly can also be rotated at high speed. The low-speed rotation caters to the cleaning assembly to blow away impurities on the inner wall of the pipe. The mass distribution of the swinging assembly is uneven when it is centrifugal, so as to achieve the purpose of vibrating the pipe.

[0009] As a further solution of the present invention, the swing assembly includes a centrifugal rod installed at the output end of the second motor, and a plurality of clamping holes are opened on the right side wall of the centrifugal rod at equal distances from top to bottom. The inner cavity of the clamping hole is clamped with a positioning unit, and a centrifugal weight is installed at the right end of the positioning unit. The rotation diameter of the centrifugal weight is adjusted by cooperating with the clamping hole and the positioning unit, thereby changing the centrifugal force generated when the centrifugal weight rotates under the condition that the speed of the second motor remains unchanged, thereby controlling the vibration intensity of the box body; the purpose is to adjust the distance from the centrifugal weight to the output end of the second motor, change the vibration intensity, and perform vibration to remove impurities from pipes of different materials.

[0010] As a further solution of the present invention, the positioning unit includes an insertion rod inserted into the inner cavity of the card hole, the right end of the insertion rod is installed with the centrifugal weight, and balls are embedded in the outer wall of the insertion rod at equal intervals along the circumference. The inner cavity of the insertion rod is respectively inserted with an extrusion block and a spring from left to right. Under the action of the spring force, the extrusion block is pushed to the left, allowing the extrusion block to squeeze the ball.

[0011] As a further solution of the present invention, the left side of the extrusion block is conical in shape.

[0012] As a further solution of the present invention, the cleaning component includes a rotating cylinder installed at the bottom of the left side wall of the box body, and a nozzle is installed at the output end of the rotating cylinder. The nozzle is connected to an air pump through an air pipe. The rotating cylinder drives the nozzle to rotate, and the nozzle changes the direction of the jet to blow away impurities on the inner wall of the pipe.

[0013] As a further solution of the present invention, the internal support mechanism includes a plurality of support rods equidistantly installed at the end of the rotating shaft along the circumferential direction, a hydraulic cylinder is also installed at the center position of the end of the rotating shaft, the outer wall of the support rod is sleeved with a slider that can slide laterally, and the slider is installed with the output end of the hydraulic cylinder, and the slider is driven by the hydraulic cylinder to slide left and right along the outer wall of the support rod, and a center rod is installed at the end of the support rod away from the rotating shaft, and the outer wall of the center rod is connected to one end of a plurality of second connecting rods through a pin shaft along the circumferential direction, and the other end of the second connecting rod is connected to an inner support plate through a pin shaft, and the outer side of the inner support plate has There are anti-slip edges to improve the friction force when the inner support plate supports the inner wall of the pipe. A guide plate is installed horizontally on the left end of the inner side of the inner support plate, and the guide plate is hollow. The outer wall of the slider is connected to one end of the third connecting rod through a pin shaft along the circumferential direction, and the intersection of the third connecting rod and the second connecting rod is connected through a pin shaft. The other end of the third connecting rod is equipped with a pin inserted in the inner cavity of the guide plate, which slides in the guide plate through the pin to provide space for the third connecting rod to rotate; the cross rotation of the second connecting rod and the third connecting rod is used to allow the inner support plate to move inward or outward at the same time, and internal support and fixation are performed for pipes with different inner diameters.

[0014] As a further solution of the present invention, the rotating shaft and the axis of the central rod are on the same straight line.

[0015] Compared with the prior art, the embodiments of the present invention have the following beneficial effects: 1. Through the telescopic coordination of the outer rod and the inner rod, combined with the first motor driving the traction rod and the first connecting rod to move the slide, the distance between the two inner support mechanisms can be flexibly adjusted to achieve accurate grasping of pipes of different lengths, greatly improving the adaptability of the spreader to various specifications of pipes. There is no need to configure a separate spreader for pipes of specific lengths, thus reducing equipment costs.

[0016] 2. The hydraulic cylinder drives the slider to slide along the support rod, and the relative rotation of the second and third connecting rods drives the inner support plate to extend outward, so that the inner support plate fits tightly against the inner wall of the pipe, realizing automatic grasping of pipes with different inner diameters. The anti-slip edges on the outside of the inner support plate further enhance the friction, effectively preventing the pipe from shaking or falling during transportation, realizing automatic grasping of the pipe, reducing manual auxiliary operations, saving labor costs, and improving the safety and efficiency of lifting operations.

[0017] 3. The second motor drives the driving gear to mesh with the driven gear, forming a speed difference: on the one hand, the rotating shaft drives the pipe to rotate at a low speed, and on the other hand, the centrifugal weight of the swing component performs high-speed centrifugal motion, using centrifugal force to generate vibration, which promotes the shedding of impurities on the inner wall of the pipe; combined with the rotating nozzle of the cleaning component to spray air, it can completely remove the detached impurities, prevent impurities from corroding the pipe, and significantly extend the service life of the pipe. At the same time, the low-speed rotation of the pipe also facilitates subsequent welding, flaw detection and other operations, further improving the overall efficiency of the operation. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] Figure 1 It is a three-dimensional diagram of the present invention; Figure 2 This is a schematic structural diagram of the distance adjustment mechanism of the present invention; Figure 3 It is a schematic structural diagram of the vibration mechanism and the inner support mechanism of the present invention; Figure 4 for Figure 3 Enlarged view of point A in the middle; Figure 5 It is a schematic diagram of the vibration mechanism structure; Figure 6 This is the exploded view of the swing assembly; Figure 7 Schematic diagram of the cleaning component structure.

[0019] Figure: 1, hanger; 2, distance adjustment mechanism; 3, telescopic frame; 4, hanger rod; 5, vibration mechanism; 6, internal support mechanism; 21, support plate; 22, slide; 23, first motor; 24, traction rod; 25, first connecting rod; 31, outer rod; 32, inner rod; 33, socket; 34, latch; 51, box body; 52, rotating shaft; 53, driven gear; 54, second motor; 55, driving gear; 56, swing Assembly; 57, cleaning assembly; 561, centrifugal rod; 562, card hole; 563, plug rod; 564, ball; 565, extrusion block; 566, spring; 567, centrifugal weight; 571, rotary cylinder; 572, nozzle; 61, support rod; 62, hydraulic cylinder; 63, slider; 64, center rod; 65, second connecting rod; 66, inner support plate; 67, guide plate; 68, third connecting rod; 69, pin. DETAILED DESCRIPTION

[0020] The technical solution of the present invention will be further described in detail below in conjunction with specific implementation methods.

[0021] The following describes embodiments of the present invention in detail. Examples of the embodiments are shown in the accompanying drawings, wherein the same or similar reference numerals throughout represent the same or similar elements or elements having the same or similar functions. The embodiments described below with reference to the accompanying drawings are exemplary and are intended only to explain the present invention and are not to be construed as limiting the present invention.

[0022] See also Figure 1-Figure 7 In an embodiment of the present invention, an automatic grabbing sling device for a crane includes a hanger 1, a distance-adjusting mechanism 2 fixedly connected to the bottom of the hanger 1, two telescopic frames 3 symmetrically mounted at both ends of the distance-adjusting mechanism 2, a boom 4 mounted on the outside of the telescopic frames 3, the telescopic frames 3 adjusting the spacing between the booms 4 according to the length of the hoisted pipe, a vibration mechanism 5 mounted at the bottom of the boom 4, the two vibration mechanisms 5 being symmetrically arranged, an inner support mechanism 6 mounted inside the vibration mechanism 5, the inner support mechanism 6 extending outward to support and fix the pipe, and the vibration mechanism 5 causing the pipe to vibrate while rotating, thereby shaking off dirt from the inner wall of the pipe; Furthermore, the distance adjustment mechanism 2 includes a support plate 21 fixedly connected to the bottom of the hanger 1, and slides 22 are slidably connected on the left and right sides of the support plate 21. The cross-section of the slide 22 is rectangular, which improves the sliding stability between the slide 22 and the support plate 21. The outer side of the slide 22 is installed on the inner side of the telescopic frame 3, and a first motor 23 is installed at the center of the lower surface of the support plate 21. A traction rod 24 is installed at the output end of the first motor 23. Both ends of the traction rod 24 are connected to one end of the first connecting rod 25 through a pin shaft, and the other end of the first connecting rod 25 is connected to the middle part of the upper surface of the slide 22 through a pin shaft. The traction rod 24 is driven by the first motor 23 to rotate clockwise or counterclockwise, so that the first connecting rod 25 pulls the two slides 22 to move inward or outward at the same time.

[0023] Furthermore, the telescopic frame 3 includes an outer rod 31 installed on the outside of the slide 22, and the inner rod 32 is inserted into the inner cavity of the outer rod 31. The outer side of the inner rod 32 is installed on the top of the suspension rod 4. A number of holes 33 are opened on the outer wall of the inner rod 32 at equal distances from left to right. The outer wall of the outer rod 31 is inserted with a pin 34. When the pin 34 passes through the hole 33, the inner rod 32 is fixed, so that the length between the outer rod 31 and the inner rod 32 can be adjusted to realize the grabbing of pipes of different lengths.

[0024] Furthermore, the vibration mechanism 5 includes a box body 51 installed at the bottom of the boom 4, and a rotating shaft 52 is installed at the bottom of the inner cavity of the box body 51 through a bearing, and a driven gear 53 is connected to the outer wall key of the rotating shaft 52. A second motor 54 is installed on the top of the left side wall of the box body 51, and a driving gear 55 and a swinging assembly 56 are installed at the output end of the second motor 54 from left to right. The driving gear 55 is meshed with the driven gear 53, and the transmission ratio is greater than 10, so that a speed difference is generated between the rotating shaft 52 and the swinging assembly 56, and the speed of the rotating shaft 52 is reduced, so that the pipe rotates slowly, which is not only convenient for adjusting the rotation angle of the pipe and convenient for the staff to perform operations such as welding and flaw detection on the pipe, but also conducive to cleaning the inner surface of the pipe. The centrifugal force generated when the swinging assembly 56 rotates causes the box body 51 to vibrate, thereby causing the pipe to vibrate and at the same time allowing the pipe to rotate. A cleaning assembly 57 is installed at the bottom inside the box body 51.

[0025] More specifically, the output of second motor 54 synchronously rotates driving gear 55 and oscillating assembly 56. Driving gear 55 meshes with driven gear 53 on shaft 52 (gear ratio > 10), causing shaft 52 to rotate at a low speed. This, in turn, drives the pipe to rotate slowly via internal support mechanism 6. Oscillating assembly 56 rotates at high speed along with second motor 54, leveraging the uneven mass distribution of centrifugal weight 567 to generate centrifugal force, causing box body 51 to vibrate and transmit this force to the pipe, shaking off dirt from the inner wall. Rotating nozzle 572 of cleaning assembly 57 simultaneously emits air, blowing the removed impurities away from the inner wall of the pipe. This speed differential design achieves synergy between the low-speed rotation of the pipe and the high-speed vibration of the oscillating assembly, ensuring uniform force across all areas of the pipe's inner wall to shake off impurities while also facilitating comprehensive cleaning coverage by the cleaning assembly.

[0026] Furthermore, the swing assembly 56 includes a centrifugal rod 561 installed at the output end of the second motor 54. A number of latch holes 562 are equidistantly provided on the right side wall of the centrifugal rod 561 from top to bottom. A positioning unit is latched in the inner cavity of the latch hole 562. A centrifugal weight 567 is installed at the right end of the positioning unit. When the centrifugal weight 567 rotates, the mass distribution is uneven, causing the box body 51 to vibrate. The rotation diameter of the centrifugal weight 567 is adjusted by cooperating with the latch hole 562 and the positioning unit, thereby changing the centrifugal force generated when the centrifugal weight 567 rotates under the condition that the speed of the second motor 54 remains unchanged, thereby controlling the vibration intensity of the box body 51.

[0027] Furthermore, the positioning unit includes an insertion rod 563 inserted into the inner cavity of the card hole 562, the right end of the insertion rod 563 is installed with the centrifugal weight 567, and the outer wall of the insertion rod 563 is equidistantly embedded with balls 564 along the circumferential direction. The inner cavity of the insertion rod 563 is respectively inserted with an extrusion block 565 and a spring 566 from left to right. Under the action of the elastic force of the spring 566, the extrusion block 565 is pushed to the left, so that the extrusion block 565 can extrude the ball 564. The left side of the extrusion block 565 is conical in shape, and the inclined surface of the extrusion block 565 can squeeze the ball 564 outward, so that the ball 564 can be stuck in the card hole 562, thereby achieving the purpose of positioning the insertion rod 563.

[0028] More specifically, the centrifugal rod 561 of the swing assembly 56 rotates with the output end of the second motor 54, and the centrifugal weight 567 at its right end is connected to the clamping hole 562 on the centrifugal rod 561 through the positioning unit; in the positioning unit, after the insertion rod 563 is inserted into the clamping hole 562, the spring 566 pushes the conical extrusion block 565 to move left, and the extrusion ball 564 protrudes from the outer wall of the insertion rod 563 and clamps the clamping hole 562 to fix the centrifugal weight 567; by selecting the clamping holes 562 of different heights, the rotation diameter of the centrifugal weight 567 can be changed. When the speed of the second motor 54 remains unchanged, the vibration intensity can be controlled by adjusting the centrifugal force; the positioning structure of the clamping hole 562 and the ball 564 is adopted to realize the rapid disassembly and assembly and position adjustment of the centrifugal weight 567, which is convenient to operate and has stable positioning; the vibration intensity can be flexibly adjusted according to the material of the pipe, such as metal, plastic and the degree of impurity adhesion, to avoid damage to the pipe due to excessive vibration or impurity residue due to insufficient vibration, thereby improving the adaptability of the device to different working conditions. Furthermore, the cleaning component 57 includes a rotating cylinder 571 installed at the bottom of the left side wall of the box body 51. A nozzle 572 is installed at the output end of the rotating cylinder 571. The nozzle 572 is connected to an air pump through an air pipe. The rotating cylinder 571 drives the nozzle 572 to rotate, and the nozzle 572 changes the direction of the jet to blow away impurities on the inner wall of the pipe.

[0029] More specifically, the rotating cylinder 571 of the cleaning component 57 drives the nozzle 572 to rotate, and the nozzle 572 is connected to an external air pump through an air pipe, and sprays high-pressure airflow onto the inner wall of the pipe during rotation; the rotating cylinder 571 drives the nozzle 572 to rotate at multiple angles, and cooperates with the slow rotation of the pipe itself to achieve full coverage of the inner wall of the pipe in the direction of the nozzle 572 jet; the high-pressure airflow directly acts on the impurities that have been shaken off, blowing them away from the inner wall of the pipe and discharging them; the rotating jet design solves the problem of limited cleaning range of fixed-direction jet cleaning, ensuring that impurities in all areas of the inner wall of the pipe can be effectively removed, and the airflow cleaning method has no mechanical contact, avoiding scratches on the inner wall of the pipe, and is especially suitable for the processing of precision pipes, while reducing the use of cleaning agents and meeting environmental protection requirements.

[0030] Furthermore, the internal support mechanism 6 includes a plurality of support rods 61 equidistantly installed at the end of the rotating shaft 52 along the circumferential direction, and a hydraulic cylinder 62 is also installed at the center position of the end of the rotating shaft 52. The outer wall of the support rod 61 is sleeved with a slider 63 that can slide laterally, and the slider 63 is installed with the output end of the hydraulic cylinder 62. The slider 63 is driven by the hydraulic cylinder 62 to slide left and right along the outer wall of the support rod 61. A center rod 64 is installed at the end of the support rod 61 away from the rotating shaft 52. The axis of the rotating shaft 52 and the center rod 64 are in the same straight line, allowing the pipe to rotate by itself to prevent the pipe from centrifugal rotation and affecting the cleaning component 57 to remove impurities from the pipe. The outer wall of the center rod 64 is connected to one end of a plurality of second connecting rods 65 through a pin along the circumferential direction. The second connecting rods The other end of the rod 65 is connected to the inner support plate 66 through a pin shaft. The outer side of the inner support plate 66 has anti-slip edges to increase the friction when the inner support plate 66 supports the inner wall of the pipe. A guide plate 67 is installed horizontally on the left end of the inner side of the inner support plate 66, and the guide plate 67 is hollow. The outer wall of the slider 63 is connected to one end of the third link 68 through a pin shaft along the circumferential direction. The intersection of the third link 68 and the second link 65 is connected by a pin shaft. The rotation between the second link 65 and the third link 68 can allow the inner support plate 66 to move inward or outward to adapt to pipes of different inner diameters. The other end of the third link 68 is installed with a pin 69 inserted in the inner cavity of the guide plate 67. The pin 69 slides in the guide plate 67 to provide a movable space for the third link 68 to rotate.

[0031] More specifically, during operation, the hydraulic cylinder 62 acts as a driving source, driving the slider 63 to slide laterally along the outer wall of the support rod 61. As the slider 63 moves toward the center rod 64, the intersecting rotation of the third link 68 and the second link 65 drives the inner support plate 66 to extend outward until it comes into close contact with the inner wall of the pipe. As the slider 63 moves away from the center rod 64, the inner support plate 66 similarly retracts inward, releasing its hold on the pipe. Simultaneously, the axis of the rotating shaft 52 and the center rod 64 remain aligned, ensuring that the pipe does not experience centrifugal rotation during its rotation. Driven by the hydraulic cylinder 62, the inner support plate 66 can be synchronously extended and retracted, allowing it to accommodate pipes of varying inner diameters, significantly expanding the sling's adaptability to a wide range of pipe specifications.

[0032] More specifically, the coaxial design of the rotating shaft 52 and the center rod 64 ensures the stability of the pipe's rotation, avoids the centrifugal rotation from affecting the cleaning effect of the cleaning component 57, and ensures the smooth progress of the cleaning operation. More specifically, when the slider 63 slides, the third link 68 and the second link 65 rotate relative to each other, and the pin 69 slides in the guide plate 67 to provide a movable space, thereby driving the inner support plate 66 to move outward or inward, and the anti-slip edges on the outer side of the inner support plate 66 contact the inner wall of the pipe, achieving a stable fixation by increasing the friction; the cross-rotation structure of the second link 65 and the third link 68 ensures the synchronization and stability of the movement of the inner support plate 66, so that the pipe is evenly stressed and avoids damage to the pipe caused by excessive local force; the inner support mechanism 6 realizes automatic and stable grasping of pipes of different inner diameters through reasonable structural design and component coordination, which not only expands the adaptability range of the sling, reduces manual auxiliary operations, but also ensures the safety and efficiency of lifting operations, and provides a stable foundation for subsequent cleaning and other operations.

[0033] Working principle: Step 1: The first motor 23 drives the traction rod 24 to rotate clockwise, and the first connecting rod 25 pulls the two slides 22 to move inward at the same time, allowing the inner support mechanism 6 to enter the interior of the pipe, thereby shifting the inner support plate 66; In step 2, the hydraulic cylinder 62 drives the slider 63 to slide inward along the support rod, causing the bottoms of the second connecting rod 65 and the third connecting rod 68 to gradually approach each other. The pin 69 slides in the guide plate 67, reserving space for the lateral movement of the third connecting rod 68. The inner support plate 66 moves outward until it contacts the inner wall of the pipe, positioning the pipe and achieving automatic grasping of the pipe, realizing the transportation of large pipes with different inner diameters. Step 3: When impurities on the inner wall of the pipe need to be cleaned, the second motor 54 drives the driving gear 55 to rotate. The driving gear 55 and the driven gear 53 transmit the power to rotate the rotating shaft 52, thereby causing the inner support plate 66 to drive the pipe to rotate. At the same time, the centrifugal rod 561 drives the centrifugal weight 567 to rotate centrifugally. The mass distribution of the centrifugal weight 567 is uneven, and the centrifugal inertia force causes the box body 51 to vibrate. The energy transferred by the solid causes the pipe to vibrate, shaking off the impurities on the inner wall of the pipe. The rotating cylinder 571 drives the nozzle 572 to rotate, changing the nozzle 572's jet angle, thereby blowing out the impurities scattered on the inner wall of the pipe, preventing the pipe from being corroded and damaged by the impurities. Step 4. When the vibration intensity needs to be changed, the insertion rod 563 is inserted into the clamping holes 562 at different heights. Under the action of the elastic force of the spring 566, the extrusion block 565 is pushed to move. The extrusion block 565 squeezes the ball 564 outward at the inclined surface. The ball 564 is clamped in the clamping hole 562 to position the displaced centrifugal weight 567. Under the condition of unchanged rotation speed, the centrifugal force generated by the centrifugal weight 567 when it rotates changes, and the vibration intensity of the pipe is adjusted. Impurities can be removed according to the stubborn characteristics of impurities on the inner wall of the pipe.

[0034] The above are only preferred embodiments of the present invention. It should be pointed out that for those skilled in the art, several modifications and improvements can be made without departing from the concept of the present invention. These should also be regarded as the scope of protection of the present invention. These will not affect the effect of the implementation of the present invention and the practicality of the patent.

Claims

1. An automatic grabbing sling device for a crane, comprising a sling (1), characterized in that: The bottom of the hanger (1) is fixedly connected to a distance adjustment mechanism (2), and two telescopic frames (3) are installed at both ends of the distance adjustment mechanism (2), and a suspension rod (4) is installed on the outside of the telescopic frame (3). The telescopic frame (3) adjusts the spacing of the suspension rods (4) according to the length of the lifted pipe. A vibration mechanism (5) is installed at the bottom of the suspension rod (4), and the two vibration mechanisms (5) are symmetrically arranged on the left and right. An inner support mechanism (6) is installed on the inner side of the vibration mechanism (5), and the inner support mechanism (6) extends outward to support and fix the pipe, and the vibration mechanism (5) can make the pipe vibrate while rotating, so as to shake off the dirt on the inner wall of the pipe.

2. The automatic grabbing sling device for a crane according to claim 1, characterized in that: The distance adjustment mechanism (2) includes a support plate (21) fixedly connected to the bottom of the hanger (1), and the left and right sides of the support plate (21) are slidably connected to slides (22), and the outer side of the slide (22) is installed on the inner side of the telescopic frame (3), and a first motor (23) is installed at the center of the lower surface of the support plate (21), and a traction rod (24) is installed at the output end of the first motor (23), and both ends of the traction rod (24) are connected to one end of a first connecting rod (25) through a pin, and the other end of the first connecting rod (25) is connected to the middle of the upper surface of the slide (22) through a pin, and the traction rod (24) is driven by the first motor (23) to rotate clockwise or counterclockwise, so that the first connecting rod (25) pulls the two slides (22) to move inward or outward at the same time.

3. The automatic grabbing sling device for a crane according to claim 2, characterized in that: The vibration mechanism (5) includes a box body (51) installed at the bottom of the suspension rod (4), a rotating shaft (52) is installed at the bottom of the inner cavity of the box body (51) through a bearing, and the outer wall of the rotating shaft (52) is keyed to a driven gear (53), and a second motor (54) is installed at the top of the left side wall of the box body (51), and the output end of the second motor (54) is respectively installed with a driving gear (55) and a swing assembly (56) from left to right, and the driving gear (55) is meshed and connected with the driven gear (53), and the transmission ratio is greater than 10, so that a speed difference is generated between the rotating shaft (52) and the swing assembly (56). The centrifugal force generated when the swing assembly (56) rotates causes the box body (51) to vibrate, thereby causing the pipe to vibrate and at the same time causing the pipe to rotate. A cleaning assembly (57) is installed at the bottom of the inner side of the box body (51).

4. The automatic grabbing sling device for a crane according to claim 3, characterized in that: The swing assembly (56) includes a centrifugal rod (561) installed at the output end of the second motor (54). A plurality of clamping holes (562) are equidistantly provided on the right side wall of the centrifugal rod (561) from top to bottom. A positioning unit is clamped in the inner cavity of the clamping hole (562). A centrifugal weight (567) is installed at the right end of the positioning unit. The rotation diameter of the centrifugal weight (567) is adjusted by cooperating with the clamping hole (562) and the positioning unit, thereby changing the centrifugal force generated by the rotation of the centrifugal weight (567) under the condition that the speed of the second motor (54) remains unchanged, thereby controlling the vibration intensity of the box body (51).

5. The automatic grabbing sling device for a crane according to claim 4, characterized in that: The positioning unit includes an insertion rod (563) inserted into the inner cavity of the clamping hole (562), the right end of the insertion rod (563) is installed with the centrifugal weight (567), the outer wall of the insertion rod (563) is equidistantly embedded with balls (564) along the circumferential direction, and the inner cavity of the insertion rod (563) is respectively inserted with an extrusion block (565) and a spring (566) from left to right. Under the elastic force of the spring (566), the extrusion block (565) is pushed to the left, so that the extrusion block (565) can extrude the balls (564).

6. The automatic grabbing sling device for a crane according to claim 5, characterized in that: The left side of the extrusion block (565) is conical in shape.

7. The automatic grabbing sling device for a crane according to claim 6, characterized in that: The cleaning assembly (57) includes a rotating cylinder (571) installed at the bottom of the left side wall of the box body (51), and a nozzle (572) is installed at the output end of the rotating cylinder (571). The nozzle (572) is connected to an air pump through an air pipe. The rotating cylinder (571) drives the nozzle (572) to rotate, and the nozzle (572) changes the direction of the air jet to blow away impurities on the inner wall of the pipe.

8. The automatic grabbing sling device for a crane according to claim 7, characterized in that: The inner support mechanism (6) includes a plurality of support rods (61) equidistantly installed at the end of the rotating shaft (52) along the circumferential direction, and a hydraulic cylinder (62) is also installed at the center position of the end of the rotating shaft (52). The outer wall of the support rod (61) is sleeved with a slider (63) capable of sliding laterally, and the slider (63) is installed with the output end of the hydraulic cylinder (62). The slider (63) is driven by the hydraulic cylinder (62) to slide left and right along the outer wall of the support rod (61). A center rod (64) is installed at one end of the support rod (61) away from the rotating shaft (52). The outer wall of the center rod (64) is connected to one end of a plurality of second connecting rods (65) through a pin along the circumferential direction. The second connecting rod (65) 5) The other end is connected to an inner support plate (66) through a pin shaft. The outer side of the inner support plate (66) has an anti-slip edge to increase the friction force when the inner support plate (66) supports the inner wall of the pipe. A guide plate (67) is installed horizontally on the left end of the inner side of the inner support plate (66), and the guide plate (67) is hollow. The outer wall of the slider (63) is connected to one end of the third connecting rod (68) through a pin shaft along the circumferential direction. The intersection of the third connecting rod (68) and the second connecting rod (65) is connected through a pin shaft. The other end of the third connecting rod (68) is installed with a pin (69) inserted into the inner cavity of the guide plate (67). The pin (69) slides in the guide plate (67) to provide a space for the third connecting rod (68) to rotate.

9. The automatic grabbing sling device for a crane according to claim 8, characterized in that: The rotating shaft (52) and the axis of the central rod (64) are on the same straight line.

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