Laser positioning device for crane hoisting

Abstract

The present invention relates to the field of laser positioning, and in particular to a laser positioning device for crane hoisting, comprising a hoisting assembly for hoisting a pipe body, wherein two hoisting assemblies form a group and two groups are provided; the hoisting assembly comprises a shell, a reeling assembly arranged inside the shell, a plurality of connecting belts arranged on the reeling assembly, a hook fixedly connected to the end of the connecting belt, a hanging hole provided on the shell for use with the hook, a hoisting rope arranged on the shell, an adjusting assembly arranged inside the shell for adjusting the position of the hoisting rope, and a laser rangefinder arranged at both ends of the shell; during a trial hoisting, the pipe body is hoisted so that the pipe body is suspended in the air, and at this time, the distance is measured by the laser rangefinder, and if there is a difference in the distance measurement data between the two groups of hoisting assemblies, it is judged that the pipe body is tilted; compared with visual inspection or tool measurement, the laser rangefinder can judge whether the pipe body is tilted faster and more accurately.

Description

Technical Field

[0001] The invention relates to the technical field of laser positioning, and in particular to a laser positioning device for crane hoisting. Background Art

[0002] In the field of modern industry and construction, crane hoisting is an indispensable and important link. Especially when hoisting large and heavy pipes, it is particularly important to accurately control the position and posture of the pipe. As a common hoisting object, the accurate determination of the center of gravity of the pipe is directly related to the safety and efficiency of the hoisting. However, in actual operation, due to the differences in the shape, material and weight distribution of the pipe, determining its center of gravity often faces many challenges. At the same time, in the initial lifting stage, how to quickly and accurately determine whether the pipe is tilted, and quickly adjust the lifting point to restore balance after tilting, is a problem that needs to be solved in current hoisting technology;

[0003] Traditional hoisting methods mainly rely on the operator's experience and judgment, and determine the center of gravity of the pipe body through visual inspection or simple measuring tools. During the trial hoisting process, the judgment of the pipe body's inclination often relies on the operator's intuitive feeling, which lacks scientific and accurate judgment basis. Once the pipe body tilts, the work of adjusting and positioning the hoisting point is also more complicated, which increases the operation time.

[0004] Therefore, a laser positioning device for crane hoisting is needed to overcome the occurrence of the above problems. Summary of the invention

[0005] In order to solve the above problems, an embodiment of the present invention provides a laser positioning device for crane hoisting, which achieves the purpose of solving the problems raised in the background technology.

[0006] In order to achieve the above-mentioned purpose, the embodiment of the present invention specifically adopts the following technical scheme: a laser positioning device for crane hoisting, comprising a hoisting assembly for hoisting a pipe body, wherein two hoisting assemblies form a group and two groups are provided;

[0007] The hoisting assembly includes a housing, a reeling assembly arranged inside the housing, a plurality of connecting belts arranged on the reeling assembly, a hook fixedly connected to the end of the connecting belt, a hanging hole provided on the housing for use with the hook, a hanging rope arranged on the housing, an adjusting assembly arranged inside the housing for adjusting the position of the hanging rope, and laser rangefinders arranged at both ends of the housing;

[0008] The adjustment assembly includes a screw rod rotatably arranged inside the housing, a motor installed inside the housing for driving the screw rod to rotate, and a slider threadedly connected to the outside of the screw rod and slidably arranged inside the housing; the suspension rope is fixedly connected to the slider;

[0009] After the tube body is lifted, the laser rangefinders at both ends of the shell measure the height from the ground, and the adjustment component adjusts the position of the lifting rope according to the distance measurement data.

[0010] As a further improvement of the above technical solution:

[0011] The winding assembly includes a connecting rod rotatably arranged inside the shell, a plurality of winding wheels fixedly connected to the outside of the connecting rod, a ratchet fixedly connected to the connecting rod, a pawl arranged on the shell for cooperating with the ratchet, and a handle fixedly connected to the end of the connecting rod; the plurality of connecting belts are respectively arranged on the outside of the plurality of winding wheels.

[0012] The winding assembly includes a plurality of connecting rods rotatably arranged inside the shell, a winding wheel 2 fixedly connected to the outside of the connecting rods 2, a ratchet 2 fixedly connected to the outside of the connecting rods 2, a pawl 2 arranged on the shell for cooperating with the ratchet 2, a connecting groove opened inside the connecting rods 2, and an insertion rod located inside the connecting groove; the plurality of connecting belts are respectively arranged on the outside of the plurality of winding wheels 2.

[0013] The housing is provided with a tension detection component for use with a laser rangefinder;

[0014] The tension detection assembly comprises two oblique tension springs respectively fixedly connected to the two ends of the shell, and a tension sensor arranged between the oblique tension spring and the shell; one end of the two oblique tension springs is fixedly connected to the suspension rope.

[0015] The fixing points of the two inclined tension springs and the suspension rope are the same point.

[0016] A non-slip pad is arranged on one side of the shell.

[0017] The laser rangefinder is installed at both ends of the housing through fixing components, and the height of the laser rangefinder can be adjusted through the fixing components.

[0018] The fixing assembly comprises a fixing block 1 fixedly connected to both ends of the shell, and a screw rod threadedly connected inside the fixing block 1; the laser rangefinder is rotatably arranged at the bottom end of the screw rod.

[0019] The fixing assembly includes a fixing block 2 fixedly connected to both ends of the shell, a square rod passing through the fixing block 2, a slot opened on one side of the square rod, and an elastic card fixedly connected to the fixing block 2 and used in conjunction with the slot.

[0020] The fixing assembly is provided with a limiting assembly for limiting the position of the opposing rod;

[0021] The limit assembly comprises a clamping block which is elastically slidably arranged on the second fixing block through a spring; the clamping block can be clamped in the interior of the clamping slot.

[0022] The beneficial effects of the embodiments of the present invention are:

[0023] During the test lifting, the pipe body is lifted up so that it is suspended in the air. At this time, the distance is measured by a laser distance meter. If there is a difference in the distance measurement data between the two sets of lifting components, it is judged that the pipe body is tilted. Compared with visual inspection or tool measurement, the laser distance meter can judge whether the pipe body is tilted faster and more accurately.

[0024] The adjusting component includes a screw rod rotatably arranged inside the housing, a motor installed inside the housing for driving the screw rod to rotate, and a slider threadedly connected to the outside of the screw rod and slidably arranged inside the housing; the suspension rope is fixedly connected to the slider; after starting, the motor drives the screw rod to rotate, thereby driving the slider to move on the screw rod, so as to change the relative position of the suspension rope and the tube body, that is, to achieve the purpose of adjusting the suspension point; after the laser rangefinder measures the distance, the position of the suspension rope is adjusted by the adjusting component, so as to achieve the purpose of facilitating the accurate positioning of the suspension point;

[0025] The purpose of using the connecting belt in the present application is that, firstly, compared with the rope, the contact area between the connecting belt and the pipe body is larger, thereby improving the stability during hoisting; in addition, since the connecting belt and the shell are integrated, when the contact area between the connecting belt and the pipe body is larger, the shell can be better fitted on the pipe body, so that when the position of the lifting rope is adjusted by the motor, it is further ensured that the shell will not move, which is convenient for adjusting the position of the lifting rope;

[0026] Multiple laser rangefinders are used to measure the distance in both sets of hoisting components AB, and the distance measurement data is processed by removing the two end values ​​and taking the average value, which can greatly eliminate the problem of obvious difference in the distance measurement data of the two sets of hoisting components AB caused by the bulge or depression directly under a laser rangefinder;

[0027] The second embodiment of the present invention proposes a reeling assembly applicable to a truncated cone tube body. In actual use, the connecting belt is first completely released from the second reeling wheel, and then the insertion rod is rotated to drive the second connecting rod to rotate. When a certain connecting belt is attached to the bottom of the tube body, the insertion rod cannot continue to rotate. At this time, it is only necessary to pull the insertion rod so that the insertion rod is pulled out from the second connecting rod corresponding to the connecting belt, and then the insertion rod can be continued to rotate. Repeating the above steps can make multiple connecting belts attached to the bottom of the tube body one by one, and the truncated cone tube body can be adapted for use;

[0028] When the shell is tilted, the angle between the shell and the suspension rope is different, and the inclined tension spring on the side with a smaller angle contracts, causing the tension sensor connected to it to read less tension, and the inclined tension spring on the side with a larger angle is stretched, causing the tension sensor connected to it to read more tension, that is, the readings of the two tension sensors on the shell are obviously different, and whether the tube body is tilted can be judged based on the difference in readings;

[0029] When the ground beneath a certain set of lifting components is sunken or convex as a whole, there will be obvious differences in the distance measurement data of the two sets of lifting components, but at this time the pipe body is nearly horizontal, i.e., it is not tilted; at this time, the tension detection component can be used to determine whether the pipe body is tilted; that is, in actual use, the distance measurement data of the laser rangefinder and the tension detection component are used to simultaneously determine whether the pipe body is tilted, thereby avoiding the problem of obvious differences in distance measurement data due to the overall depression or convexity of the ground beneath a certain set of lifting components. BRIEF DESCRIPTION OF THE DRAWINGS

[0030] Figure 1 It is a structural schematic diagram of the present invention from a first viewing angle;

[0031] Figure 2 It is a structural schematic diagram of the second viewing angle of the present invention;

[0032] Figure 3 It is a structural schematic diagram of a combination of implementation mode 1 of embodiment 1, embodiment 3 and embodiment 4 of the present invention;

[0033] Figure 4 for Figure 3 A cross-sectional schematic diagram of

[0034] Figure 5 for Figure 4 A schematic diagram of the structure enlargement at the center A;

[0035] Figure 6 This is a structural diagram of implementation mode 2 of embodiment 4 of the present invention;

[0036] Figure 7 It is a cross-sectional schematic diagram of the fixing assembly in the second implementation mode of the fourth embodiment of the present invention;

[0037] Figure 8 for Figure 7 A schematic diagram of the structure enlargement at the center A;

[0038] Fig. 9 This is a schematic diagram of the structure of Embodiment 2 of the present invention;

[0039] Fig.10 is a cross-sectional schematic diagram of a second embodiment of the present invention;

[0040] Fig.11 for Fig.10 A schematic diagram of the structure enlargement at the center A;

[0041] Fig.12 for Fig.10 A magnified schematic diagram of the structure at point B in the middle.

[0042] In the figure: 1. Lifting assembly; 2. Tension detection assembly; 3. Anti-slip pad; 4. Fixing assembly; 5. Limiting assembly;

[0043] 11. Shell; 12. Retracting assembly; 13. Connecting belt; 14. Hook; 15. Hanging hole; 16. Lifting rope; 17. Adjusting assembly; 18. Laser rangefinder;

[0044] 121, connecting rod 1; 122, winding wheel 1; 123, ratchet wheel 1; 124, ratchet 1; 125, handle; 126, connecting rod 2; 127, winding wheel 2; 128, ratchet wheel 2; 129, ratchet 2; 1210, connecting groove; 1211, plug rod;

[0045] 171, screw rod; 172, motor; 173, slider;

[0046] 21. Inclined tension spring; 22. Tension sensor;

[0047] 41. Fixed block 1; 42. Screw; 43. Fixed block 2; 44. Square rod; 45. Card slot; 46. Elastic card;

[0048] 51. Spring; 52. Block. DETAILED DESCRIPTION

[0049] The preferred embodiments of the present invention are described below with reference to the accompanying drawings. It should be understood by those skilled in the art that these embodiments are only used to explain the technical principles of the present invention and are not intended to limit the protection scope of the present invention.

[0050] See also Figures 1 to 12 The embodiment of the present invention discloses a laser positioning device for crane hoisting, comprising a hoisting assembly 1 for hoisting a pipe body, wherein two hoisting assemblies 1 form a group and two groups are provided; in actual use, the two groups of hoisting assemblies 1 are respectively provided on both sides of the center of gravity of the pipe body, and the hoisting assembly 1 is connected to the sling of the crane, thereby realizing the hoisting of the pipe body;

[0051] The hoisting assembly 1 includes a housing 11, a reeling assembly 12 disposed inside the housing 11, a plurality of connecting belts 13 disposed on the reeling assembly 12, a hook 14 fixedly connected to the end of the connecting belt 13, a hanging hole 15 provided on the housing 11 for use with the hook 14, a sling 16 disposed on the housing 11, an adjusting assembly 17 disposed inside the housing 11 for adjusting the position of the sling 16, and a laser rangefinder 18 disposed at both ends of the housing 11; the sling 16 is fixed on the sling of the crane;

[0052] The adjustment assembly 17 includes a screw rod 171 rotatably arranged inside the housing 11, a motor 172 installed inside the housing 11 for driving the screw rod 171 to rotate, and a slider 173 threadedly connected to the outside of the screw rod 171 and slidably arranged inside the housing 11; the suspension rope 16 is fixedly connected to the slider 173; after starting, the motor 172 drives the screw rod 171 to rotate, thereby driving the slider 173 to move on the screw rod 171, so as to change the relative position of the suspension rope 16 and the tube body, that is, to achieve the purpose of adjusting the suspension point;

[0053] In actual use, two groups of lifting components 1 are arranged on both sides of the center of gravity of the pipe body, and then the two lifting components 1 in a single group are relatively arranged on both sides of the pipe body, so that the shell 11 fits on the pipe body, and then the hook 14 is pulled to make the reeling component 12 release the connecting belt 13, so that the hook 14 passes through the bottom of the pipe body and is hung on the hanging hole 15 relative to the lifting component 1. After operating multiple hooks 14 in sequence, multiple connecting belts 13 can be located under the pipe body, and then the pipe body can be lifted for trial lifting operation;

[0054] During the trial lifting, the pipe body is lifted so that it is suspended in the air. At this time, the distance is measured by the laser rangefinder 18. Then the adjustment component 17 adjusts the position of the suspension rope 16 according to the distance data of the laser rangefinder 18, that is, adjusts the position of the suspension point; specifically:

[0055] The laser rangefinders 18 on the two groups of hoisting components 1 measure the distance. When the distance measurement data of the hoisting components 1 of group A is greater than the distance measurement data of the hoisting components 1 of group B, it means that the pipe body is currently tilted toward the position of the hoisting components 1 of group B. At this time, the adjustment component 17 adjusts the position of the hanging rope 16 to be close to the position of group B, so that the inclination of the pipe body can be leveled; after the laser rangefinder 18 measures the distance, the position of the hanging rope 16 is adjusted by the adjustment component 17, so as to achieve the purpose of facilitating the accurate positioning of the hanging point;

[0056] Since the length of the housing 11 is limited, that is, the length of the screw rod 171 is limited, and the length of the screw rod 171 determines the moving range of the slider 173, that is, the moving range of the suspension rope 16. After the suspension rope 16 is adjusted to the limit position, the inclined tube body still cannot be leveled. At this time, it means that the initial position of the housing 11 is incorrect, that is, it means that the initial center of gravity position of the tube body is wrongly judged, and the center of gravity position needs to be re-judged to re-determine the fixed position of the housing 11; specifically, if the tube body is still tilted toward the position of the B group lifting component 1 after the suspension rope 16 is adjusted to the limit position, at this time, the slider 173 is reset to the center (relative to the screw rod 171), and the housing 11 is moved to the position close to the B group lifting component 1;

[0057] When the adjusting component 17 adjusts the position of the hanging rope 16, the pipe body needs to be dropped so that the pipe body falls on the ground, and then the position of the hanging rope 16 is adjusted by the adjusting component 17; this is because if the position of the hanging rope 16 is adjusted by the adjusting component 17 when the pipe body is suspended in the air, since the pipe body has no fulcrum, when the motor 172 drives the slider 173 to move, the housing 11 will move, that is, the pipe body will move, and the pipe body in the suspended state will inevitably shake after moving, which is not conducive to the stable lifting; therefore, when the position of the hanging rope 16 is adjusted by the adjusting component 17, the pipe body is made to fall to the ground, which When the motor 172 drives the slider 173 to move, the slider 173 moves on the housing 11, that is, the position of the suspension rope 16 is adjusted; it should also be noted that when the tube falls to the ground, the suspension rope 16 still needs to maintain a certain tension, that is, it still needs to provide a certain pulling force to the tube. When the suspension rope 16 provides a certain pulling force to the tube, the housing 11 can be clamped on the outside of the tube, so that there is enough friction between the housing 11 and the tube, so that the housing 11 cannot move. In this way, the slider 173 can be moved only when the motor 172 drives the screw rod 171 to rotate;

[0058] The purpose of using the connecting belt 13 in the present application is that, firstly, compared with the rope, the contact area between the connecting belt 13 and the pipe body is larger, thereby improving the stability during hoisting; in addition, since the connecting belt 13 and the outer shell 11 are integrated, when the contact area between the connecting belt 13 and the pipe body is larger, the outer shell 11 can be better fitted on the pipe body, so that when the position of the lifting rope 16 is adjusted by the motor 172, it is further ensured that the outer shell 11 will not move, which facilitates the adjustment of the position of the lifting rope 16;

[0059] After the tube body is hoisted, the laser rangefinders 18 at both ends of the housing 11 measure the height from the ground, and the adjustment component 17 adjusts the position of the suspension rope 16 according to the distance measurement data;

[0060] When the laser rangefinder 18 is used for distance measurement, a total of eight laser rangefinders 18 are provided, wherein each group of hoisting components 1 is provided with four laser rangefinders 18. When measuring the distance, the laser rangefinder 18 in each group will have four distance measurement data. When analyzing the data, the largest and smallest two distance measurement data are discarded, and the average of the remaining two data is taken as the distance measurement data of the group; the purpose of using multiple laser rangefinders 18 for distance measurement is to avoid the influence caused by the uneven ground directly under the AB group hoisting components 1; for example, if the AB group hoisting components 1 are each provided with only one laser rangefinder 18, when the A group hoisting components 1 When there is a protrusion or depression directly below the laser rangefinder 18, the distance measurement data of the A group of lifting components 1 will be different from the distance measurement data of the B group of lifting components 1. When there is a difference in the distance measurement data, it is determined that the pipe body is in a tilted state, but the actual pipe body is already in a nearly horizontal state and there is no need to adjust the position of the lifting point; multiple laser rangefinders 18 are used in the AB groups of lifting components 1 to measure the distance, and the distance measurement data is processed by removing the two end values ​​and then taking the average value, which can greatly eliminate the problem of obvious difference in the distance measurement data of the AB groups of lifting components 1 when there is a protrusion or depression directly below a laser rangefinder 18.

[0061] As the first embodiment of the present application:

[0062] The reeling assembly 12 includes a connecting rod 121 rotatably disposed inside the housing 11, a plurality of reeling wheels 122 fixedly connected to the outside of the connecting rod 121, a ratchet 123 fixedly connected to the connecting rod 121, a ratchet 124 disposed on the housing 11 for use with the ratchet 123, and a handle 125 fixedly connected to the end of the connecting rod 121; a plurality of connecting belts 13 are respectively disposed outside the plurality of reeling wheels 122;

[0063] When the connecting belt 13 is arranged below the tube body, in order to make the outer shell 11 fit on the side of the tube body, the release length of the connecting belt 13 needs to be adjusted so that the connecting belt 13 fits on the bottom of the tube body and the outer shell 11 also fits on the side of the tube body;

[0064] When adjusting the length of the connecting belt 13, pull the pawl 124 to separate the pawl 124 and the ratchet wheel 123. At this time, the connecting rod 121 can be rotated in a certain direction through the handle 125 to release the connecting belt 13 from the winding wheel 122, that is, the released length of the connecting belt 13 is increased; after releasing the pawl 124, the pawl 124 is engaged with the ratchet wheel 123. At this time, the connecting rod 121 can be rotated in another direction through the handle 125 to retract the connecting belt 13 into the winding wheel 122, that is, the released length of the connecting belt 13 is shortened.

[0065] As the second embodiment of this application:

[0066] The reeling assembly 12 includes a plurality of connecting rods 126 rotatably disposed inside the housing 11, a reeling wheel 127 fixedly connected to the outside of the connecting rod 126, a ratchet 128 fixedly connected to the outside of the connecting rod 126, a ratchet 129 disposed on the housing 11 for use with the ratchet 128, a connecting groove 1210 provided inside the connecting rod 126, and an inserting rod 1211 located inside the connecting groove 1210; a plurality of connecting belts 13 are respectively disposed outside the plurality of reeling wheels 127;

[0067] When the connecting belt 13 is arranged below the tube body, in order to make the outer shell 11 fit on the side of the tube body, the release length of the connecting belt 13 needs to be adjusted so that the connecting belt 13 fits on the bottom of the tube body and the outer shell 11 also fits on the side of the tube body;

[0068] When using a special tube body, for example, when the tube body is truncated, that is, the diameter of the tube body gradually increases from one end; the release lengths of multiple connecting belts 13 in the reeling assembly 12 of the first embodiment are changed at the same time and remain consistent, which makes it difficult to make the multiple connecting belts 13 fit on the tube body and the outer shell 11 fit on the tube body at the same time, so it is difficult to use for a truncated tube body;

[0069] The second embodiment of the present invention proposes a reeling assembly 12 that can be applied to a conical tube body. In actual use, the connecting belt 13 is first completely released from the second reeling wheel 127, and then the insertion rod 1211 is rotated to drive the second connecting rod 126 to rotate. When a certain connecting belt 13 is attached to the bottom of the tube body, the insertion rod 1211 cannot continue to rotate. At this time, it is only necessary to pull the insertion rod 1211 so that the insertion rod 1211 is pulled out from the second connecting rod 126 corresponding to the connecting belt 13, and then the insertion rod 1211 can be continued to be rotated. Repeating the above steps can make multiple connecting belts 13 fit one by one on the bottom of the tube body, and the conical tube body can be adapted for use.

[0070] As the third embodiment of the present application:

[0071] The housing 11 is provided with a tension detection assembly 2 for use with a laser rangefinder 18;

[0072] The tension detection assembly 2 includes two inclined tension springs 21 respectively fixedly connected to the two ends of the housing 11, and a tension sensor 22 arranged between the inclined tension springs 21 and the housing 11; one end of the two inclined tension springs 21 is fixedly connected to the suspension rope 16; when the housing 11 is tilted, the angles between the housing 11 and the suspension rope 16 are different, and the inclined tension spring 21 located on the side with the smaller angle is contracted, so that the tension reading of the tension sensor 22 connected thereto is reduced, and the inclined tension spring 21 located on the side with the larger angle is stretched, so that the tension reading of the tension sensor 22 connected thereto is increased, that is, the readings of the two tension sensors 22 on the housing 11 are obviously different, and whether the tube body is tilted can be judged based on the difference in readings;

[0073] In actual use, if only a hanging rope 16 is provided on the housing 11 for lifting, even if the hanging rope 16 is located at the center of gravity of the housing 11, the housing 11 is still prone to tilting. By providing the tension detection component 2 to pull the two ends of the housing 11, when the hanging rope 16 is located at the center of gravity of the housing 11, the possibility of tilting of the housing 11 can be completely avoided;

[0074] Although the present application uses multiple laser rangefinders 18 to measure distance, and the distance measurement data is processed by removing the two end values ​​and taking the average value, it can greatly eliminate the problem that the distance measurement data of the two groups of hoisting components 1 AB are obviously different when there is a bulge or depression directly below a laser rangefinder 18; however, if the ground under one of the two groups of hoisting components 1 AB is overall depressed or overall convex, it will cause the overall distance measurement data of the group of laser rangefinders 18 to be larger or smaller, and ultimately cause the distance measurement data of the two groups of hoisting components 1 to be obviously different; therefore, the present application uses the tension detection component 2 to target such special situations;

[0075] When the ground under a certain group of hoisting components 1 is sunken or convex as a whole, there is a significant difference in the distance measurement data of the two groups of hoisting components 1, but at this time the pipe body is in a nearly horizontal state, that is, it is not tilted; at this time, the tension detection component 2 can be used to judge whether the pipe body is tilted; that is, in actual use, the distance measurement data of the laser rangefinder 18 and the tension detection component 2 are used to simultaneously judge whether the pipe body is tilted, so as to avoid the problem of significant difference in distance measurement data caused by the ground under a certain group of hoisting components 1 being sunken or convex as a whole;

[0076] The fixing points of the two inclined tension springs 21 and the suspension rope 16 are the same point. In the initial state, the suspension rope 16 is located in the middle of the two inclined tension springs 21, so that the inclination angles and deformation amounts of the two inclined tension springs 21 are the same, that is, the readings of the two tension sensors 22 are the same;

[0077] It is worth noting that even if the inclination angles and deformation amounts of the two inclined tension springs 21 are the same, there will still be a slight difference in the readings of the two tension sensors 22, which can be ignored in actual use; only when there is a significant difference in the readings of the two tension sensors 22 can it be determined that the housing 11 is in an inclined state, that is, it can be determined that the tube body is in an inclined state;

[0078] In addition, since the motor 172 is installed at one end of the shell 11, the weight distribution of the shell 11 is uneven. Therefore, when the slider 173 moves to the middle position of the screw rod 171, the shell 11 will tilt when the lifting rope 16 lifts the shell 11, resulting in differences in the readings of the two tension sensors 22. In order to eliminate this problem, a counterweight block can be installed at the end of the shell 11 away from the motor 172, so that the shell 11 remains in a nearly horizontal state when the lifting rope 16 lifts the shell 11.

[0079] As a further illustration of this application:

[0080] An anti-slip pad 3 is provided on one side of the housing 11 to increase the friction between the housing 11 and the tube body;

[0081] The present application provides a certain pulling force on the tube body by the lifting rope 16 so that the outer shell 11 is clamped on the outside of the tube body, the outer shell 11 can be better fitted on the tube body by using the connecting belt 13, and the friction between the outer shell 11 and the tube body is increased by the anti-slip pad 3; its ultimate goal is to prevent relative movement between the outer shell 11 and the tube body when the position of the lifting rope 16 is adjusted by the motor 172. This is because when lifting, it is first necessary to determine the approximate position of the lifting point, place the outer shell 11 at the approximate position, and then conduct a trial lifting. The position of the lifting rope 16 is adjusted through the trial lifting. The specific position of the outer shell 11 directly determines the specific position range of the lifting point. If relative movement occurs between the outer shell 11 and the tube body when the position of the lifting rope 16 is adjusted, the trial lifting operation needs to be performed again.

[0082] As the fourth embodiment of the present application:

[0083] The laser rangefinder 18 is mounted on both ends of the housing 11 through the fixing assembly 4, and the height of the laser rangefinder 18 can be adjusted through the fixing assembly 4;

[0084] Although the present application uses multiple laser rangefinders 18 to measure distance, and the distance measurement data is processed by removing the two end values ​​and taking the average value, it can greatly eliminate the problem that the distance measurement data of the two groups AB of hanging components 1 are obviously different due to the bulge or depression directly below a certain laser rangefinder 18; however, if the ground under one of the two groups AB of hanging components 1 is overall depressed or overall convex, it will cause the overall distance measurement data of the group of laser rangefinders 18 to be larger or smaller, and ultimately cause the distance measurement data of the two groups of hanging components 1 to be obviously different;

[0085] The present application adjusts the height of the laser rangefinder 18. After the hanging assembly 1 is installed on the pipe body, the height of the laser rangefinder 18 is adjusted by the fixing assembly 4, so that each laser rangefinder 18 is attached to the ground below it, that is, the distance reading of the laser rangefinder 18 is reset to zero. Even if the ground below is concave or convex as a whole, it will not affect the distance data of the two sets of hanging assemblies 1, that is, it will not affect the judgment of whether the pipe body is tilted.

[0086] As implementation method 1 of embodiment 4 of the present application:

[0087] The fixing assembly 4 includes a fixing block 41 fixedly connected to both ends of the housing 11, and a screw 42 threadedly connected to the inside of the fixing block 41; the laser rangefinder 18 is rotatably arranged at the bottom end of the screw 42; the screw 42 is rotated to make the screw 42 move in the fixing block 41, thereby adjusting the height of the laser rangefinder 18.

[0088] As the second implementation of the fourth embodiment of the present application:

[0089] The fixing assembly 4 includes a fixing block 43 fixedly connected to both ends of the housing 11, a square rod 44 inserted into the fixing block 43, a slot 45 provided on one side of the square rod 44, and an elastic card 46 fixedly connected to the fixing block 43 and used in conjunction with the slot 45. In actual use, the square rod 44 is pulled to adjust the height of the laser rangefinder 18, and the square rod 44 does not move automatically in the fixing block 43 through the cooperation of the elastic card 46 and the slot 45.

[0090] The fixing assembly 4 is provided with a limiting assembly 5 for limiting the position of the square rod 44; the limiting assembly 5 includes a clamping block 52 elastically slidably arranged on the fixing block 43 by a spring 51; the clamping block 52 can be clamped in the inside of the clamping groove 45; when the pipe body is hoisted, a certain degree of vibration will occur, and the limiting assembly 5 is used to limit the position of the square rod 44, so as to avoid the self-movement of the square rod 44 caused by the vibration;

[0091] When the square rod 44 needs to be moved, the block 52 is pulled to separate the block 52 from the slot 45, and the square rod 44 can be pulled normally; when the square rod 44 does not need to be moved, the block 52 is released so that the block 52 is engaged with the inside of the slot 45 under the elastic force of the spring 51, thereby limiting the position of the square rod 44.

[0092] It should be noted that in the description of the present invention, the terms "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer" and the like indicating directions or positional relationships are based on the directions or positional relationships shown in the drawings, which are only for the convenience of description, and do not indicate or imply that the device or element must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as limiting the present invention. In addition, the terms "first", "second", and "third" are used for descriptive purposes only, and cannot be understood as indicating or implying relative importance.

[0093] In addition, it should be noted that in the description of the present invention, unless otherwise clearly specified and limited, the terms "installed", "connected", and "connected" should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection, or it can be indirectly connected through an intermediate medium, or it can be the internal communication of two components. For those skilled in the art, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0094] The term "comprise" or any other similar term is intended to cover a non-exclusive inclusion, such that a process, article, or apparatus / device that includes a list of elements includes not only those elements but also other elements not expressly listed, or elements inherent to such process, article, or apparatus / device.

[0095] So far, the technical solutions of the present invention have been described in conjunction with the preferred embodiments shown in the accompanying drawings. However, it is easy for those skilled in the art to understand that the protection scope of the present invention is obviously not limited to these specific embodiments. Without departing from the principle of the present invention, those skilled in the art can make equivalent changes or substitutions to the relevant technical features, and the technical solutions after these changes or substitutions will fall within the protection scope of the present invention.

Claims

1. A laser positioning device for crane hoisting, characterized in that: It comprises a hoisting assembly (1) for hoisting the pipe body, wherein two hoisting assemblies (1) form a group and two groups are provided; The hoisting assembly (1) comprises a housing (11), a reeling assembly (12) arranged inside the housing (11), a plurality of connecting straps (13) arranged on the reeling assembly (12), a hook (14) fixedly connected to the end of the connecting strap (13), a hanging hole (15) provided on the housing (11) for use with the hook (14), a hanging rope (16) arranged on the housing (11), an adjusting assembly (17) arranged inside the housing (11) for adjusting the position of the hanging rope (16), and laser rangefinders (18) arranged at both ends of the housing (11); The reeling assembly (12) comprises a plurality of connecting rods (126) rotatably arranged inside the housing (11), a reeling wheel (127) fixedly connected to the outside of the connecting rods (126), a ratchet (128) fixedly connected to the outside of the connecting rods (126), a ratchet pawl (129) arranged on the housing (11) for use with the ratchet (128), a connecting groove (1210) provided inside the connecting rods (126), and an inserting rod (1211) located inside the connecting groove (1210); the plurality of connecting belts (13) are respectively arranged outside the plurality of reeling wheels (127); The adjustment assembly (17) comprises a screw rod (171) rotatably disposed inside the housing (11), a motor (172) mounted inside the housing (11) and used to drive the screw rod (171) to rotate, and a slider (173) threadedly connected to the outside of the screw rod (171) and slidably disposed inside the housing (11); the suspension rope (16) is fixedly connected to the slider (173); After the tube body is lifted, the laser rangefinders (18) at both ends of the outer shell (11) measure the height above the ground, and the adjustment component (17) adjusts the position of the lifting rope (16) according to the distance measurement data.

2. A laser positioning device for crane hoisting according to claim 1, characterized in that: The housing (11) is provided with a tension detection component (2) for use in conjunction with a laser rangefinder (18); The tension detection assembly (2) comprises two inclined tension springs (21) respectively fixedly connected to two ends of the housing (11), and a tension sensor (22) arranged between the inclined tension springs (21) and the housing (11); one end of the two inclined tension springs (21) is fixedly connected to the suspension rope (16).

3. A laser positioning device for crane hoisting according to claim 2, characterized in that: The fixing points of the two inclined tension springs (21) and the suspension rope (16) are the same point.

4. A laser positioning device for crane hoisting according to claim 1, characterized in that: An anti-slip pad (3) is provided on one side of the housing (11).

5. The laser positioning device for crane hoisting according to claim 1, characterized in that: The laser rangefinder (18) is mounted on both ends of the housing (11) via a fixing assembly (4), and the height of the laser rangefinder (18) can be adjusted via the fixing assembly (4).

6. A laser positioning device for crane hoisting according to claim 5, characterized in that: The fixing assembly (4) comprises a fixing block (41) fixedly connected to both ends of the housing (11), and a screw (42) threadedly connected to the inside of the fixing block (41); the laser rangefinder (18) is rotatably arranged at the bottom end of the screw (42).

7. The laser positioning device for crane hoisting according to claim 5, characterized in that: The fixing assembly (4) comprises a second fixing block (43) fixedly connected to both ends of the housing (11), a square rod (44) inserted into the interior of the second fixing block (43), a card slot (45) provided on one side of the square rod (44), and an elastic card (46) fixedly connected to the interior of the second fixing block (43) and used in conjunction with the card slot (45).

8. A laser positioning device for crane hoisting according to claim 7, characterized in that: The fixing component (4) is provided with a limiting component (5) for limiting the position of the opposing rod (44); The limiting assembly (5) comprises a clamping block (52) elastically slidably arranged on the second fixing block (43) via a spring (51); the clamping block (52) can be clamped inside the clamping slot (45).

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