A sling

Abstract

The present application relates to hoisting technology field, specifically for a kind of lifting appliance, comprising: bearing platform, first lifting point, second lifting point, third lifting point and fourth lifting point are sequentially arranged from left to right on the bearing platform in character type;Character beam lifting appliance is arranged above bearing platform, the both ends of the character beam lifting appliance are provided with fifth lifting point, connected with third lifting rope and fourth lifting rope, and the end of third lifting rope away from character beam lifting appliance forms first annular portion;The end of fourth lifting rope away from character beam lifting appliance forms second annular portion.The lifting appliance provided in the present application adopts the combination structure of character beam lifting appliance and several lifting ropes, replaces the frame lifting appliance with high cost, and greatly reduces the lifting appliance cost of long box four-point lifting.By setting the lifting ring that can slide along the lifting rope, in the process of lifting, the lifting ring can automatically slide and adjust position, so that each lifting rope is automatically balanced, realizes stable, reliable four-point lifting, without manual intervention.

Description

Technical Field

[0001] This invention relates to the field of hoisting technology, and more specifically to a hoisting tool. Background Technology

[0002] A prefabricated substation, also known as a box-type substation, is a type of electrical equipment that integrates power transformers, high and low voltage switchgear, inverters, and PCS (Power Control System) into one or more cabinets. It can be lifted and transported as a whole. For conventional prefabricated substations with shorter lengths, two-point lifting is often used, employing a low-cost single-beam lifting device. However, when the cabinet length is longer (such as energy storage prefabricated substations or new energy prefabricated substations), (e.g....) Figure 5 Two-point lifting can easily cause deformation in the middle of the support platform due to excessive bending moment. Therefore, for long boxes, four-point lifting is usually required (e.g., Figure 6 ).

[0003] Currently, four-point lifting generally requires the use of specialized frame lifting equipment. Taking a standard 25-ton lifting rig as an example, the cost of a single-beam lifting rig is approximately 5,000 yuan, while the cost of a frame lifting rig is as high as approximately 13,000 yuan. Existing technology lacks a solution that can achieve stable four-point lifting using low-cost single-beam lifting equipment, resulting in persistently high costs for lifting long box hulls. Summary of the Invention

[0004] The purpose of this invention is to solve the problem that the lack of a solution in the prior art that can achieve stable four-point lifting using a low-cost single-beam lifting device leads to high costs for lifting long box bodies, and to propose a lifting device.

[0005] The objective of this invention can be achieved through the following technical solutions: A lifting device, comprising: The support platform has four lifting points arranged in a straight line from left to right: the first lifting point, the second lifting point, the third lifting point, and the fourth lifting point. A single-beam lifting device is arranged above the support platform. Both ends of the single-beam lifting device are equipped with a fifth lifting point, which is connected to a third lifting rope and a fourth lifting rope. The end of the third lifting rope away from the single-beam lifting device forms a first ring part; the end of the fourth lifting rope away from the single-beam lifting device forms a second ring part. The system comprises a first, second, fifth, and sixth lifting rope, wherein one end of the fifth rope is connected to the second lifting point, one end of the sixth rope is connected to the third lifting point, and the other ends of the fifth and sixth ropes are knotted together to form a knot; one end of the first rope is connected to the first lifting point, and the other end passes through the first loop and connects to the knot; one end of the second rope is connected to the fourth lifting point, and the other end passes through the second loop and connects to the knot.

[0006] As a further aspect of the present invention: the first suspension rope and the second suspension rope are of the same length, the fifth suspension rope and the sixth suspension rope are of the same length, and the third suspension rope and the fourth suspension rope are of the same length.

[0007] As a further aspect of the present invention: under the balanced lifting state, the first annular part slides along the first lifting rope until the resultant force along the direction of the first lifting rope is zero, so that the tension T1 of the first lifting rope is equal to the tension T5 of the fifth lifting rope; the second annular part slides along the second lifting rope until the resultant force along the direction of the second lifting rope is zero, so that the tension of the second lifting rope is equal to the tension of the sixth lifting rope, and the tensions of the first lifting rope and the second lifting rope are equal, and the tensions of the fifth lifting rope and the sixth lifting rope are equal.

[0008] As a further aspect of the present invention: the resultant force of the tension of the first suspension rope and the fifth suspension rope is located on the first angle bisector of the first suspension point and the second suspension point, and coincides with the tension direction of the third suspension rope; the resultant force of the tension of the second suspension rope and the sixth suspension rope is located on the second angle bisector of the third suspension point and the fourth suspension point, and coincides with the tension direction of the fourth suspension rope.

[0009] As a further aspect of the present invention: when the center of gravity of the support platform shifts, the first annular part and the second annular part adaptively slide along the corresponding suspension rope to adjust the tension distribution and the point of action of the resultant force until the line of action of the total tension passes vertically through the center of gravity of the support platform, thereby eliminating the unbalanced torque.

[0010] As a further aspect of the present invention: a seventh lifting rope is connected to the top of the beam lifting device, and the end of the seventh lifting rope away from the beam lifting device is connected to the main lifting point to prevent the beam lifting device from deflecting.

[0011] As a further aspect of the present invention: the first lifting point, the second lifting point, the third lifting point, and the fourth lifting point are located on the same horizontal line of the support platform.

[0012] As a further aspect of the present invention: under the lifting balance state, the angle between the third and fourth pull ropes is 55°, and the angle between the fifth and sixth pull ropes is 50°; One end of the first pull rope passes through the first ring and connects to the node. At this connection, the first pull rope forms a turn with an angle of 78°. The second pull rope forms the same turn as the first pull rope.

[0013] As a further aspect of the present invention: the tension of the first and second suspension ropes is T1, and the tension of the fifth and sixth suspension ropes is T5, and T1=T5.

[0014] The beneficial effects of this invention are as follows: The lifting device provided by this invention adopts a combination structure of a single-beam lifting device and several lifting ropes, replacing the expensive frame lifting device and significantly reducing the cost of lifting devices for four-point lifting of long box bodies. By setting lifting rings that can slide along the lifting ropes, the lifting rings can automatically slide and adjust their positions during the lifting process, so that the force on each lifting rope is automatically balanced, achieving stable and reliable four-point lifting without manual intervention. Attached Figure Description

[0015] The invention will now be further described with reference to the accompanying drawings.

[0016] Figure 1 This is a schematic diagram of the invention during the hoisting process; Figure 2 yes Figure 1 Side view; Figure 3 This is an auxiliary diagram used for acceptance analysis.

[0017] Figure 4 This is a schematic diagram showing the positions of the first and second angle bisectors; Figure 5 This is a schematic diagram of two-point lifting in existing technology; Figure 6 This is a schematic diagram of four-point lifting in existing technology; In the diagram: 1. First lifting rope; 2. Second lifting rope; 3. First ring section; 4. Second ring section; 3. Third lifting rope; 4. Fourth lifting rope; 5. Fifth lifting rope; 6. Sixth lifting rope; 7. Seventh lifting rope; 8. One-beam lifting device; 9. Support platform; 10. Frame lifting device; A. First lifting point; B. Second lifting point; C. Third lifting point; D. Fourth lifting point; U. Fifth lifting point; M. Junction; X. First angle bisector; E. Second angle bisector. Detailed Implementation

[0018] The technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0019] like Figure 1 , Figure 2As shown, a lifting device includes a support platform 9 and a beam lifting device 8. The support platform 9 serves as the bottom support structure for the object being lifted, such as a long box. It has four lifting points on its left and right sides, denoted as: left outer first lifting point A, left middle second lifting point B, right middle third lifting point C, and right outer fourth lifting point D. All lifting points are located on the same horizontal line as the support platform 9. The beam lifting device 8 can be the beam lifting device mentioned in the background art.

[0020] The support platform 9 has four lifting points connected to lifting ropes: the first lifting rope 1 is connected to the first lifting point A on the left outer side, the fifth lifting rope 5 is connected to the second lifting point B in the left middle, the sixth lifting rope 6 is connected to the third lifting point C in the right middle, and the second lifting rope 2 is connected to the fourth lifting point D on the right outer side. The first lifting rope 1 and the second lifting rope 2 are of equal length, and the fifth lifting rope 5 and the sixth lifting rope 6 are of equal length.

[0021] A beam lifting device 8 is horizontally positioned above the support platform 9 along its width. Each end of the beam lifting device 8 has a lifting point for suspending two sets of lifting ropes. The third rope 3 and the fourth rope 4 within each set of ropes are suspended from the same lifting point. The third rope 3 and the fourth rope 4 are of equal length. The lower end of the third rope 3 has a first annular portion 31, and the lower end of the fourth rope 4 has a first annular portion 41. The inner diameter of the lifting ring is larger than the outer diameter of the first rope 1 and the second rope 2, allowing the first rope 1 to pass through the lifting ring 31 and slide freely, and the second rope 2 to pass through the lifting ring 41 and slide freely.

[0022] One end of the first suspension rope 1 is connected to the first suspension point A on the left outer side, and the other end passes through the lower ring 31 of the third suspension rope 3 and connects to the upper end of the fifth suspension rope 5. One end of the second suspension rope 2 is connected to the fourth suspension point D on the right outer side, and the other end passes through the lower ring 41 of the fourth suspension rope 4 and connects to the upper end of the sixth suspension rope 6. The lower end of the fifth suspension rope 5 is connected to the second suspension point B on the left middle side, and the lower end of the sixth suspension rope 6 is connected to the third suspension point C on the right middle side. The ends of the first suspension rope 1, the second suspension rope 2, the fifth suspension rope 5, and the sixth suspension rope 6 are connected together.

[0023] The upper ends of the third lifting rope 3 and the fourth lifting rope 4 are respectively connected to the lifting points of the beam lifting device 8. The top of the beam lifting device 8 is also connected to the seventh lifting rope 7, the upper end of which is connected to the main lifting point such as the hook, to assist in lifting or prevent the beam lifting device 8 from deflecting.

[0024] like Figure 3 As shown, the force analysis, combined with the structural connection relationships, is analyzed step by step as follows: Node definition: The suspended platform 9 has 4 lifting points from left to right along the horizontal direction: the first lifting point A (left outer), the second lifting point B (left middle), the third lifting point C (right middle), and the fourth lifting point D (right outer). All lifting points are on the same horizontal line of the platform. The lower end of the third lifting rope 3 has a sliding lifting ring 31 (which can slide freely along the first lifting rope 1), and the lower end of the fourth lifting rope 4 has a sliding lifting ring 41 (which can slide freely along the second lifting rope 2).

[0025] Force balance of a single sliding ring (taking the left side 31 as an example), ring 31 is subjected to a total of 3 forces: The upward tension T3 of the third suspension rope 3 is directed along the third suspension rope 3 toward the fifth suspension point U; The tension T1 in the first suspension rope 1 is directed to the lower left, and the direction is along the first suspension rope 1 towards the first suspension point A on the outside. The downward tension T5 of the suspension rope 5 is directed along the suspension rope 5 towards the second suspension point B in the middle.

[0026] Since the ring can slide freely along the first rope 1, the net force along the first rope 1 must be zero when in equilibrium (otherwise the ring will continue to slide and cannot be stationary). Therefore, the core conclusion can be derived: T1=T5, that is, the tension of the first rope 1 and the fifth rope 5 is equal.

[0027] like Figure 4 As shown, according to the rules of force composition, the resultant force of two equal tensions T1 and T5 must be on the first angle bisector X of the first lifting point A, the first ring 31, and the second lifting point B. This resultant force needs to be balanced with the upward tension T3. Therefore, the direction of the third lifting rope 3 must coincide with the first angle bisector X. The lifting ring will automatically slide and adjust its position until this balance condition is met. The same applies to the lifting ring 41 on the right.

[0028] The overall automatic balancing process: In the initial stage of lifting, if the center of gravity of the object being lifted is not directly below the fifth lifting point U, there will be an unbalanced torque, which will cause changes in the tension of the lifting rope and drive the two lifting rings to slide and adjust along the corresponding lifting rope. If the center of gravity is biased to the left, the left hanging ring will slide to the first hanging point A on the outside, and the right hanging ring will automatically adjust in the corresponding direction, automatically changing the distribution of the left and right tension and the position of the resultant force application point. When the line of action of the total tension force is finally adjusted so that it passes vertically through the center of gravity of the suspended object, the unbalanced torque disappears, the deflection stops, and a stable balance is achieved.

[0029] The overall forces after equilibrium are satisfied by the static equilibrium condition after stable equilibrium is achieved. Torque balance: The line of action of the total tension passes through the center of gravity of the suspended object, the overall deflection torque is zero, the suspended object maintains a stable posture, and the force on the lifting point is automatically distributed according to the position of the center of gravity.

[0030] The foregoing has shown and described the basic principles, main features, and advantages of the present invention. Those skilled in the art should understand that the present invention is not limited to the above embodiments. The embodiments and descriptions in the specification are merely principles of the invention. Various changes and modifications can be made to the invention without departing from its spirit and scope, and all such changes and modifications fall within the scope of the claimed invention. The scope of protection claimed by the appended claims and their equivalents is defined.

Claims

1. A lifting device, characterized in that, include: The support platform (9) has a first lifting point (A), a second lifting point (B), a third lifting point (C) and a fourth lifting point (D) arranged in a straight line from left to right. A beam lifting device (8) is arranged above the support platform. Both ends of the beam lifting device (8) are provided with a fifth lifting point (U) and connected to a third lifting rope (3) and a fourth lifting rope (4). The end of the third lifting rope (3) away from the beam lifting device (8) forms a first ring (31); the end of the fourth lifting rope (4) away from the beam lifting device (8) forms a second ring (41). The first suspension rope (1), the second suspension rope (2), the fifth suspension rope (5), and the sixth suspension rope (6) are connected as follows: one end of the fifth suspension rope (5) is connected to the second suspension point (B), one end of the sixth suspension rope (6) is connected to the third suspension point (C), and the other ends of the fifth suspension rope (5) and the sixth suspension rope (6) are tied together to form a knot (M); one end of the first suspension rope (1) is connected to the first suspension point (A), and the other end passes through the first ring part (31) and is connected to the knot (M); one end of the second suspension rope (2) is connected to the fourth suspension point (D), and the other end passes through the second ring part (41) and is connected to the knot (M).

2. The lifting device according to claim 1, characterized in that, The first rope (1) and the second rope (2) are of the same length, the fifth rope (5) and the sixth rope (6) are of the same length, and the third rope (3) and the fourth rope (4) are of the same length.

3. The lifting device according to claim 2, characterized in that, Under the balanced lifting condition, the first ring part (31) slides along the first lifting rope (1) until the resultant force along the direction of the first lifting rope (1) is zero, so that the tension T1 of the first lifting rope (1) is equal to the tension T5 of the fifth lifting rope (5); the second ring part (41) slides along the second lifting rope (2) until the resultant force along the direction of the second lifting rope (2) is zero, so that the tension of the second lifting rope (2) is equal to the tension of the sixth lifting rope (6), and the tensions of the first lifting rope (1) and the second lifting rope (2) are equal, and the tensions of the fifth lifting rope (5) and the sixth lifting rope (6) are equal.

4. The lifting device according to claim 4, characterized in that, The resultant force of the first suspension rope (1) and the fifth suspension rope (5) is located on the first angle bisector (X) between the first suspension point (A) and the second suspension point (B), and coincides with the direction of the tension of the third suspension rope (3); the resultant force of the second suspension rope (2) and the sixth suspension rope (6) is located on the second angle bisector (E) between the third suspension point (C) and the fourth suspension point (D), and coincides with the direction of the tension of the fourth suspension rope (4).

5. The lifting device according to claim 1, characterized in that, The first lifting point (A), the second lifting point (B), the third lifting point (C), and the fourth lifting point (D) are located on the same horizontal line of the support platform (9).

6. The lifting device according to any one of claims 1 to 5, characterized in that, The top of the beam lifting device (8) is connected to the seventh lifting rope (7), and the end of the seventh lifting rope (7) away from the beam lifting device (8) is connected to the main lifting point to prevent the beam lifting device (8) from deflecting.

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