A method for confirming a tripod hanging point

Abstract

The application provides a tripod hanging point confirmation method. The second hanging point and the third hanging point are calculated in the first plane coordinate through the projection position of the second hanging point in the first plane and the projection position of the third hanging point in the first plane. Then, the height position of the second hanging point is determined according to the distance between the preset position of the second hanging point and the first plane, and the height position of the third hanging point is determined according to the distance between the preset position of the third hanging point and the first plane. The accuracy is high.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of cranes, in particular to a method for confirming a lifting point of a tripod. BACKGROUND

[0002] In the assembly process of a crane, different components need to be lifted by a crane for step-by-step assembly, such as a tripod. Before lifting and installing the tripod, if the tripod is not placed in a preset state, the tripod needs to be turned over first to change the placement state of the tripod.

[0003] As disclosed in the patent document with Chinese application number 202211174001.9 and application date 2022.9.26, a method for assembling a crane is disclosed, which discloses the lifting of a base, a resting rack, a tripod, and a lifting arm. However, it does not disclose a method for turning over the tripod. In order to ensure that the tripod can be turned over more reliably and effectively, the position of the tripod lifting point is a very important factor. If the tripod lifting point is not accurately confirmed, such as during the lifting of the tripod, the center of gravity will be unstable and will shake, which will cause problems in stable lifting. SUMMARY

[0004] The present application is a method for confirming a lifting point of a tripod, which determines the position of the lifting point of the tripod during lifting and turning over, so that the tripod can be lifted and turned over stably.

[0005] To achieve the above-mentioned purpose, the technical solution of the present application is as follows: a method for confirming a lifting point of a tripod, comprising the following steps:

[0006] S1, presetting the force F1 of a first lifting hook and the force F2 of a second lifting hook.

[0007] S2, presetting the position of a first lifting point.

[0008] S3, taking the top of the tripod before turning over as a first plane, taking the position of the center of gravity of the base projected onto the first plane as an origin, establishing a coordinate system, determining the coordinates of the first lifting point in the coordinate system according to the position of the first lifting point, and calculating the distance L1 between the coordinates of the first lifting point and the origin of the coordinate system.

[0009] S4, by calculating the distance L2 between the origin of the coordinate system and the second lifting point, determining the position range of the second lifting point.

[0010] S5, determining the coordinates of the second lifting point in the coordinate system along the horizontal direction of the first lifting point on the rear pull rod according to the position range of the second lifting point; then determining the position of the second lifting point on the pulley frame through the distance between the top of the pulley frame and the first plane.

[0011] S6, determine the stress midpoint between the first lifting point and the second lifting point, and determine the distance L3 between the coordinate system origin and the stress midpoint.

[0012] S7, preset the stress F4 of the independent lifting hook; preset the distance L5 between the stress midpoint and the third lifting lug.

[0013] S8, by Calculate the distance L4 between the third lifting point and the coordinate system origin, and determine the position range of the third lifting point; F3 is the sum of the stresses of the first lifting hook and the second lifting hook.

[0014] S9, according to the coordinate of the third lifting point in the coordinate system, determine the coordinate of the third lifting point on the front pull rod.

[0015] S10, according to the distance between the bottom of the tripod before turning over and the first plane, determine the position of the third lifting point at the bottom of the front pull rod.

[0016] The above method realizes the stress balance between the first lifting hook and the second lifting hook, the moment of force of the first lifting point and the coordinate system origin, and the moment of force of the second lifting point and the coordinate system origin. The position range of the second lifting point is calculated by the moment of force of the first lifting point and the coordinate system origin, and then the coordinates of the second lifting point in the coordinate system are determined, and then the coordinates of the second lifting point in the coordinate system are converted into the position on the pulley frame. The stress balance between the horizontal beam double hook and the independent lifting hook is realized, the moment of force of the stress midpoint and the coordinate system origin, and the moment of force of the third lifting point and the coordinate system origin. The position range of the third lifting point is calculated by the moment of force of the stress midpoint and the coordinate system origin, and then the coordinates of the third lifting point in the coordinate system are determined, and the method is simple. Through the projection position of the second lifting point on the first plane and the projection position of the third lifting point on the first plane, the coordinates of the second lifting point and the third lifting point on the first plane are calculated, and then the height position of the second lifting point is determined according to the distance between the preset position of the second lifting point and the first plane, and the height position of the third lifting point is determined according to the distance between the preset position of the third lifting point and the first plane, which is high in accuracy.

[0017] The first lifting point and the second lifting point are arranged on one side of the tripod, and the third lifting point is arranged on the other side of the tripod. When in use, the first lifting point and the second lifting point drive one side of the tripod to descend, and the third lifting point drives the other side of the tripod to ascend, so that the bottom of the tripod after turning over is parallel to the supporting surface. By turning over the tripod parallel to the supporting surface, the placing state of the tripod is changed, so that the tripod can be stably lifted and turned over.

[0018] Further, in S5, the coordinates of the second lifting point in the coordinate system are determined. Specifically, along the horizontal direction of the first lifting point, the intersection of the end of the rear pull rod away from the first lifting point and L2 determines the coordinates of the second lifting point in the coordinate system.

[0019] The above method confirms the coordinates of the second lifting point at the other end of the rear pull rod away from the first lifting point, and the second lifting point is arranged away from the first lifting point, so that the tripod can be stably lifted.

[0020] Further, the coordinates of the third lifting point in the coordinate system are determined through the intersection of L4 and L5 on the front pull rod. The coordinates of the third lifting point are determined through the intersection of two ranges, which is simple.

[0021] Further, S10 is further followed by S11; S11, a lifting lug is arranged on the first lifting point, the second lifting point and the third lifting point respectively. The lifting lug is arranged to facilitate connection with the steel wire rope. BRIEF DESCRIPTION OF DRAWINGS

[0022] Fig. 1 It is a plan view of the tripod before overturning in the present application.

[0023] Fig. 2 It is a front view of the tripod before overturning in the present application.

[0024] Fig. 3 It is a flowchart of the present application. DETAILED DESCRIPTION

[0025] The present application will be further described in detail below in combination with the drawings and specific embodiments.

[0026] As shown in the drawings, Figs. 1-3 A method for confirming the lifting point of a tripod, comprising the following steps:

[0027] S1, presetting the force F1 of the first lifting hook 21 and the force F2 of the second lifting hook 22.

[0028] S2, presetting the position of the first lifting point 11. The first lifting point 11 is arranged at one end of the rear pull rod 15 away from the pulley frame 14 on one side of the tripod 1.

[0029] S3, taking the top of the tripod 1 before overturning as a first plane J, taking the position of the gravity center 10 of the base projected to the first plane J as an origin, establishing a coordinate system, determining the coordinates of the first lifting point 11 in the coordinate system according to the position of the first lifting point 11, and calculating the distance L1 between the coordinates of the first lifting point 11 and the origin of the coordinate system. In this embodiment, the coordinate system is a plane coordinate system.

[0030] S4, calculating the distance L2 between the origin of the coordinate system and the second lifting point 12 to determine the position range of the second lifting point 12.

[0031] ​S5, along the horizontal direction of the first lifting point 11, the intersection of the rear pull rod 15 away from the first lifting point 11 and L2 determines the planar coordinates of the second lifting point 12 in the coordinate system; then through the distance between the top of the pulley frame 14 and the first plane J, the height position of the second lifting point 12 in the pulley frame 14 is determined. The second lifting point 12 is arranged on the pulley frame 14 on one side of the tripod 1. The coordinates of the second lifting point 12 are confirmed at the other end of the rear pull rod 15 away from the first lifting point 11, and the second lifting point 12 is arranged away from the first lifting point 11, so that the tripod 1 can be stably lifted.

[0032] S6, determine the force center point between the first lifting point 11 and the second lifting point 12, and determine the distance L3 between the origin of the coordinate system and the force center point. In this embodiment, the force center point is the projection of the midpoint of the horizontal distance between the first lifting lug and the second lifting lug on the first plane.

[0033] S7, preset the force F4 of the independent lifting hook 3; preset the distance L5 between the force center point and the third lifting lug.

[0034] S8, through Calculate the distance L4 between the third lifting point 13 and the origin of the coordinate system to determine the position range of the third lifting point 13; F3 is the sum of the forces of the first lifting hook 21 and the second lifting hook 22.

[0035] S9, determine the coordinates of the third lifting point 13 in the coordinate system through the intersection of L4 and L5 on the front pull rod 16. The planar coordinates of the third lifting point 13 are determined through the intersection of the two ranges, which is simple

[0036] S10, according to the distance between the bottom of the tripod 1 before overturning and the first plane J, the position of the third lifting point 13 at the bottom of the front pull rod 16 is determined. The third lifting point 13 is arranged on the front pull rod 16 on the other side of the tripod 1. The spatial coordinates of the third lifting lug 13 are determined through the distance between the bottom of the tripod 1 before overturning and the first plane J, and the height position of the coordinates of the third lifting lug 13 is adjusted.

[0037] The above method realizes force balance between the first hook 21 and the second hook 22, and the moment of force of the first lifting point 11 and the coordinate system origin and the moment of force of the second lifting point 12 and the coordinate system origin are equal; the position range of the second lifting point 12 is calculated through the moment of force of the first lifting point 11 and the coordinate system origin, and then the coordinates of the second lifting point 12 are determined on the rear pull rod 15, and then the coordinates of the second lifting point 12 in the coordinate system are converted into the position on the pulley frame 14. The force balance between the beam double hook 2 and the independent hook 3 is realized, and the moment of force of the force center and the coordinate system origin and the moment of force of the third lifting point 13 and the coordinate system origin are equal; the position range of the third lifting point 13 is calculated through the moment of force of the force center and the coordinate system origin, and then the coordinates of the third lifting point 13 are determined, and then the coordinates of the third lifting point 13 in the coordinate system are converted into the position at the bottom of the front pull rod 16, and the method is simple.

[0038] The coordinates of the second lifting point and the third lifting point in the first plane are calculated through the projection position of the second lifting point in the first plane and the projection position of the third lifting point in the first plane, and then the height position of the second lifting point is determined according to the distance between the second lifting point preset position and the first plane, and the height position of the third lifting point is determined according to the distance between the third lifting point preset position and the first plane, and the accuracy is high.

[0039] The first lifting point 11 and the second lifting point 12 are arranged on one side of the tripod 1, and the third lifting point 13 is arranged on the other side of the tripod 1, and lifting lugs are arranged on the first lifting point 11, the second lifting point 12 and the third lifting point 13 respectively. When in use, the lifting lug of the first lifting point 11 is connected with the first hook 21 through a steel wire rope, the lifting lug of the second lifting point 12 is connected with the second hook 22 through a steel wire rope, and the lifting lug of the third lifting point 13 is connected with the third hook 3 through a steel wire rope.

[0040] When hoisting, the tripod is first hoisted horizontally through the first hook, the second hook and the third hook; then the first lifting point and the second lifting point drive one side of the tripod to descend, and the third lifting point drives the other side of the tripod to ascend, so that the bottom of the overturned tripod is parallel to the supporting surface. The overturned tripod is overturned through the anti-overturning mechanism, the placing state of the tripod is changed, and the subsequent installation of the tripod is facilitated.

Claims

1. A method for confirming the suspension points of a tripod, characterized in that: Includes the following steps: S1, preset the force F1 on the first hook and the force F2 on the second hook; S2, Preset the position of the first lifting point; S3. Take the top of the tripod before it is flipped as the first plane, and the position of the center of gravity of the base projected onto the first plane as the origin. Establish a coordinate system, determine the coordinates of the first suspension point in the coordinate system based on the position of the first suspension point, and calculate the distance L1 between the coordinates of the first suspension point and the origin of the coordinate system. S4, Pass Calculate the distance L2 between the origin of the coordinate system and the second lifting point to determine the position range of the second lifting point; S5. Along the horizontal direction of the first suspension point, determine the coordinates of the second suspension point in the coordinate system on the rear tie rod according to the position range of the second suspension point; then determine the position of the second suspension point on the pulley frame by the distance between the top of the pulley frame and the first plane; S6. Determine the midpoint of the force between the first and second lifting points, and determine the distance L3 between the origin of the coordinate system and the midpoint of the force. S7, preset force F4 on the independent hook; preset distance L5 between the midpoint of the force and the third lifting point; S8, Through Calculate the distance L4 between the third lifting point and the origin of the coordinate system to determine the position range of the third lifting point; F3 is the sum of the forces on the first hook and the second hook; S9. Determine the coordinates of the third suspension point in the coordinate system based on the position range of the third suspension point and the distance L5 between the midpoint of the force and the third suspension point on the front tie rod. S10. Determine the position of the third suspension point at the bottom of the front tie rod based on the distance between the bottom of the tripod before it is flipped and the first plane.

2. The method for confirming the suspension point of a tripod according to claim 1, characterized in that: In S5, the coordinates of the second lifting point in the coordinate system are determined by using the intersection of L2 and the horizontal direction of the first lifting point.

3. The method for confirming the suspension point of a tripod according to claim 1, characterized in that: Specifically, S9 involves determining the coordinates of the third suspension point in the coordinate system by using the intersection of L4 and L5 on the front tie rod.

4. The method for confirming the suspension point of a tripod according to claim 1, characterized in that: S10 is followed by S11; S11, lifting lugs are respectively installed at the first lifting point, the second lifting point and the third lifting point.

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