A tower crane rope supporting device

Abstract

The present invention discloses a rope-supporting device for a tower crane, comprising a wheel, a support frame, a traction pulley and a rope-supporting pulley, wherein the support frame is provided with three layers, the wheels are provided at the four corners of the upper layer of the support frame, the traction pulley is provided at the left and right sides of the middle layer of the support frame, the rope-supporting pulley is provided in the middle of the bottom layer of the support frame, and the traction pulley and the rope-supporting pulley are provided in the same rotation direction. The present invention is durable and will not interfere with the operation of the hoisting trolley, thereby solving the negative impact of the sagging of the wire rope on the performance of the tower crane.

Description

Technical Field

[0001] The invention relates to the technical field of tower crane auxiliary equipment, in particular to a tower crane rope supporting device. Background Art

[0002] Tower crane, also known as tower crane, is a kind of lifting equipment used in construction. The lifting wire rope is a device that transmits power to lift objects. It starts from the drum of the lifting mechanism on the tower crane's balance arm, is wound on the pulley set of the lifting trolley and the hook, and is fixed at the end of the boom. When the trolley runs to the far end of the boom, the wire rope is suspended too long, and the wire rope will sag due to its own weight. At present, with the increasing number of high-rise and large-scale building construction projects, large and super-large tower cranes have also become the mainstream products in the current market. The boom of large and super-large tower cranes is relatively long, reaching 80 meters, and the wire rope is thicker in diameter and heavier in mass, and the sagging phenomenon is more serious. Because the sagging wire rope is located in the space of the lifting trolley's movement track, the rope support device cannot affect the normal travel of the lifting trolley, so the industry currently generally uses the method of increasing the hook's deadweight to balance the sagging wire rope.

[0003] The fixed rope-supporting device that has appeared so far: It is fixed to the belly rod under the crane boom with a single-point cantilever support, and a trigger device is installed on the crane trolley. The rope-supporting device is equipped with a trigger wheel and a rotating device. When the trolley passes by, the trigger device presses the trigger wheel to rotate the torsion spring in the rotating device, and the rope-supporting device rotates 90° to avoid the crane trolley. After the trolley passes by, the torsion spring makes the rope-supporting device rebound to the initial working position. By repeatedly triggering the torsion spring, the effect of avoiding interference with the trolley's travel and stabilizing the rope-supporting device is achieved.

[0004] At present, the industry adopts the method of increasing the deadweight of the hook to balance the sagging caused by the deadweight of the lifting wire rope. This is a method of increasing the weight of the hook at the expense of the lifting weight allowed by the design. The increase in the weight of the hook means that the weight of the hoisted object must be reduced accordingly, which greatly reduces the load and efficiency of the tower crane and also increases the cost of the manufacturer. And when the tower crane uses a 4-fold hook group to work, only 1 / 4 of the deadweight of the hook is used to balance the deadweight of the wire rope. The sagging phenomenon of the wire rope is more serious. Although this method is simple and convenient to implement, it will have a negative impact on the performance of the tower crane. Moreover, the rotating rebound device of the fixed rope support device is a fatigue-prone accessory. Once the device fails, the rope support device will interfere with the travel of the trolley. The boom is suspended in the air and the operating space is small, so replacement and maintenance are extremely difficult. Summary of the invention

[0005] The purpose of the present invention is to provide a rope-supporting device which will not affect the normal operation of a lifting trolley, is durable, and will not interfere with the operation of the lifting trolley, so as to solve the problem that the sagging of the wire rope has a negative impact on the performance of the tower crane.

[0006] In order to achieve the above object, the present invention adopts the following technical solutions:

[0007] A tower crane rope supporting device comprises a wheel, a support frame, a traction pulley and a rope supporting pulley, wherein the support frame is provided with three layers, the wheels are arranged on the four corners of the upper layer of the support frame, the traction wheel is arranged on the left and right sides of the middle layer of the support frame, and the rope supporting pulley is arranged in the middle of the bottom layer of the support frame, and the rotation directions of the traction wheel and the rope supporting pulley are consistent.

[0008] Furthermore, the support frame includes a wheel frame, a middle frame and a rope-supporting pulley suspension frame, the middle frame is a horizontally arranged square frame, the wheel frame is vertically fixed above the square frame, the wheels are fixedly arranged on the four corners of the top of the wheel frame, a rotating shaft connection is arranged between two opposite wheels, the traction pulley is arranged on both sides of the middle part of the middle frame, and the rope-supporting pulley suspension frame is arranged in the middle of the middle frame, below the middle of the rope-supporting pulley.

[0009] Furthermore, the rope-supporting pulley suspension frame includes a cross bar and a suspension rod, the cross bar is fixed on the middle frame, the suspension rod is fixedly connected to the middle part of the cross bar and arranged vertically downward, and the rope-supporting pulley is arranged at the bottom of the rope-supporting pulley suspension frame.

[0010] Furthermore, there are two cross bars arranged side by side, there are also two suspension rods arranged side by side, and the rope supporting pulley is arranged between the two suspension rods.

[0011] A tower crane lifting system includes a lifting mechanism, a lifting wire rope, a rope supporting device, a luffing mechanism, and a lifting trolley. The luffing mechanism is provided with a luffing wire rope that passes through and connects the rope supporting device and the lifting trolley. The lifting wire rope passes through the lifting mechanism and the rope supporting device in turn and is connected to the lifting trolley. The wire ropes on both sides of the lifting trolley are symmetrically arranged.

[0012] Furthermore, the lifting wire rope passes through the rope supporting pulley in the rope supporting device, and the drooping lifting wire rope is lifted by the rope supporting pulley. The traction pulleys on both sides of the rope supporting device are respectively connected to the variable amplitude wire rope to fix the entire rope supporting device horizontally.

[0013] Furthermore, the luffing mechanism is provided with a plurality of luffing traction rollers to pull and fix the luffing steel wire rope.

[0014] Furthermore, the lifting trolley includes a frame, a traction pulley block, a lifting pulley block and a hook, the luffing wire rope passes through the traction pulley block to fix the frame at the same horizontal line as the rope supporting device, the traction pulley block is fixed at the middle of the frame, the hook is arranged directly below the lifting pulley block, the lifting pulley block includes three pulleys and is arranged in a triangle, the luffing wire rope passes through one side pulley of the traction pulley block, is connected to the lower pulley of the lifting pulley block, and then is connected to the other side pulley of the traction pulley block, the lifting wire rope passes through one side pulley of the traction pulley block, and is connected to the upper pulley of the lifting pulley block.

[0015] In summary, since the present invention adopts the above technical solution, the present invention has the following technical effects:

[0016] (1) The rated lifting weight of the tower crane of the present invention is the total weight of the hook and the lifting object. When the rope support device is installed, the hook only needs to meet the strength requirements for lightweight design, thereby improving the actual performance of the tower crane.

[0017] (2) The rope-supporting device of the present invention can stably support the sagging steel wire rope and ensure the smooth passage of the lifting trolley. It has high stability and low failure rate, thereby reducing the negative impact of the sagging of the lifting steel wire rope on the effective use height space and tower crane performance of the tower crane.

[0018] (3) The rope support device of the present invention reduces the time of rope collection and increases the working efficiency of the tower crane. When working on a group of towers, the drooping wire rope will interfere with the operation of the tower cranes or other construction equipment and buildings. In the past, the only way was to increase the height of the tower body. The output line of the rope support device reduces the cost of equipment use and is conducive to the overlapping of the working range of the tower cranes. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] Figure 1 is a top view of the rope supporting device of the present invention;

[0020] Figure 2 is a side view of the rope supporting device of the present invention;

[0021] Figure 3 It is a structural schematic diagram of the lifting system of the present invention;

[0022] Figure 4 It is a structural schematic diagram of the lifting trolley of the present invention;

[0023] Figure 5 It is a schematic diagram of the structure of a traditional lifting system;

[0024] In the accompanying drawings, there are wheels 1, supporting frame 2, wheel frame 21, middle frame 22, rope-supporting pulley suspension frame 23, cross bar 231, hanging rod 232, traction pulley 3, rope-supporting pulley 4, lifting mechanism 5, lifting wire rope 6, rope-supporting device 7, luffing mechanism 8, lifting trolley 9, frame 91, traction pulley block 92, lifting pulley block 93, hook 94, and luffing wire rope 10. DETAILED DESCRIPTION

[0025] In order to make the purpose, technical solution and advantages of the present invention more clearly understood, the present invention is further described in detail below with reference to the accompanying drawings and preferred embodiments. However, it should be noted that many details listed in the specification are only for the purpose of enabling the reader to have a thorough understanding of one or more aspects of the present invention, and these aspects of the present invention can be implemented even without these specific details.

[0026] Example 1

[0027] like Figure 1 and Figure 2 As shown, a rope-supporting device for a tower crane includes a wheel 1, a support frame 2, a traction pulley 3 and a rope-supporting pulley 4. The support frame 2 is provided with three layers, the wheel 1 is arranged at the four corners of the upper layer of the support frame 2, the traction pulley 3 is arranged on the left and right sides of the middle layer of the support frame 2, and the rope-supporting pulley 4 is arranged in the middle of the bottom layer of the support frame 2. The rotation directions of the wheel 1, the traction pulley 3 and the rope-supporting pulley 4 are all consistent. The rope-supporting device can stably support the sagging wire rope and ensure the smooth passage of the hoisting trolley. It has high stability and low failure rate. It can reduce the negative impact of the sagging of the lifting wire rope on the effective use height space of the tower crane and the performance of the tower crane.

[0028] The support frame 2 includes a wheel frame 21, a middle frame 22 and a rope-supporting pulley suspension frame 23. The middle frame is a horizontally arranged square frame, the wheel frame 21 is vertically fixed above the square frame, the wheel 1 is fixedly arranged on the four corners of the top of the wheel frame, a rotating shaft connection is arranged between two opposite wheels, the traction pulley is arranged on both sides of the middle of the middle frame, the rope-supporting pulley suspension frame 23 is arranged in the middle of the middle frame, and the rope-supporting pulley 4 is arranged below the middle.

[0029] The rope-supporting pulley suspension frame 23 includes a cross bar 231 and a suspension rod 232, wherein the cross bar is fixed on the middle frame, the suspension rod is fixedly connected to the middle of the cross bar 231 and is arranged vertically downward, the rope-supporting pulley 4 is arranged at the bottom of the rope-supporting pulley suspension frame, there are two cross bars 231 arranged side by side, and there are also two suspension rods 232 arranged side by side, and the rope-supporting pulley 4 is arranged between the two suspension rods.

[0030] The rope support device of this scheme is a steel structure trolley frame welded with angle steel, channel steel and steel plate. Traction pulley blocks are installed on the left and right sides to play a traction role in the operation of the rope support device. The rope support pulley block in the middle plays a role in stabilizing the rope support during the operation of the device. The wheels are placed on the tracks of the lower chords on both sides of the crane boom and perform luffing movement with the trolley.

[0031] Example 2

[0032] A tower crane lifting system includes a lifting mechanism 5, a lifting wire rope 6, a rope supporting device 7, a luffing mechanism 8, and a lifting trolley 9. The luffing mechanism 8 is provided with a luffing wire rope 10 that passes through and connects the rope supporting device and the lifting trolley. The lifting wire rope 6 passes through the lifting mechanism and the rope supporting device in turn and is connected to the lifting trolley 9. The wire ropes on both sides of the lifting trolley 9 are symmetrically arranged. The rated lifting weight of the tower crane is the total weight of the hook and the lifting object. When the rope supporting device is installed, the hook only needs to meet the strength requirements for lightweight design, thereby improving the actual performance of the tower crane.

[0033] The lifting wire rope 6 passes through the rope supporting pulley in the rope supporting device, and the drooping lifting wire rope is lifted up by the rope supporting pulley. The traction pulleys on both sides of the rope supporting device 7 are respectively connected to the luffing wire rope to fix the entire rope supporting device 7 horizontally. A plurality of luffing traction rollers are provided in the luffing mechanism 8 to pull and fix the luffing wire rope.

[0034] The rope supporting device 7 includes a wheel 1, a support frame 2, a traction pulley 3 and a rope supporting pulley 4. The support frame is provided with three layers, the wheels are arranged at the four corners of the upper layer of the support frame, the traction pulley is arranged on the left and right sides of the middle layer of the support frame, and the rope supporting pulley is arranged in the middle of the bottom layer of the support frame. The rotation directions of the wheels, traction pulleys and rope supporting pulleys are all consistent. The structure of the rope supporting device is consistent with that of Example 1. The rope supporting device can stably support the sagging wire rope and ensure the smooth passage of the lifting trolley. It has high stability and low failure rate. It can reduce the negative impact of the sagging of the lifting wire rope on the effective use height space of the tower crane and the performance of the tower crane; the rope supporting device reduces the time of the hoisting rope and increases the working efficiency of the tower crane. When working in a group of towers, the sagging wire rope interferes with the operation between tower cranes or other construction equipment and buildings, and in the past, the height of the tower body could only be increased. The outlet of the rope supporting device reduces the cost of equipment use and is conducive to the overlapping of the working ranges of the tower cranes.

[0035] The lifting trolley 9 includes a frame 91, a traction pulley block 92, a lifting pulley block 93 and a hook 94. The luffing wire rope passes through the traction pulley block to fix the frame at the same horizontal line as the rope supporting device. The traction pulley block is fixed at the middle of the frame. The hook is arranged directly below the lifting pulley block. The lifting pulley block includes three pulleys and is arranged in a triangle. After the luffing wire rope passes through one side pulley of the traction pulley block, it is connected to the pulley at the lower middle of the lifting pulley block, and then connected to the pulley on the other side of the traction pulley block. The lifting wire rope passes through one side pulley of the traction pulley block and is connected to the pulley at the upper middle of the lifting pulley block.

[0036] The present invention mainly uses a trolley-like device to lift the wire rope and reduce the sagging amplitude of the lifting wire rope. Front and rear rope-supporting trolleys are provided on both sides of the lifting trolley, and the left and right ends of the rope-supporting trolleys are traction guide wheels. As shown in the figure, the wire rope passes through the traction guide wheels on both sides of the rope-supporting trolley, one end of which is fixed on the lifting boom, and the other end is respectively connected to the boom mechanism and the lifting trolley. A set of constant-speed linkage devices with unchanged relative positions is formed. In order to achieve the effect of the present invention, a rope-supporting pulley is provided in the middle lower part of the rope-supporting trolley to play the role of supporting the sagging wire rope.

[0037] The present invention uses a pulley block to drive the rope supporting device and the lifting trolley with a variable amplitude mechanism, so that the rope supporting device and the lifting trolley keep their relative positions unchanged and move in the same direction at the same speed, so that the rope supporting device can support and lift the steel wire rope without interfering with the operation of the lifting trolley.

[0038] The rope supporting device and the lifting trolley of the present invention can operate simultaneously; the original structural components of the tower crane can also be used, and the rope supporting device imitates the structural type of the lifting trolley. The rope supporting device can play a role in supporting the rope, solving the problem that the deliberately designed hook is overweight due to the sagging of the wire rope, and the design allows the lifting weight to be wasted. The rope supporting device is linked with the lifting trolley to solve the problem that the rope supporting device affects the operation of the lifting trolley.

[0039] The above is only a preferred embodiment of the present invention. It should be pointed out that for ordinary technicians in this technical field, several improvements and modifications can be made without departing from the principle of the present invention. These improvements and modifications should also be regarded as the scope of protection of the present invention.

Claims

1. A tower crane rope supporting device, characterized in that: It includes a wheel, a support frame, a traction pulley and a rope-supporting pulley, wherein the support frame is provided with three layers, the rope-supporting pulley is arranged in the middle of the bottom layer of the support frame, and the rotation directions of the traction pulley and the rope-supporting pulley are arranged in the same direction; The support frame includes a wheel frame, a middle frame and a rope pulley suspension frame, wherein the middle frame is a horizontally arranged square frame, the wheel frame is vertically fixed above the square frame, the wheel is fixedly arranged at the four corners of the top of the wheel frame, a rotating shaft connection is arranged between two opposite wheels, the traction pulley is arranged on the left and right sides of the middle of the middle frame, and the rope pulley suspension frame is arranged in the middle of the middle frame; The rope-supporting pulley suspension frame comprises a cross bar and a suspension rod, wherein the cross bar is fixed on the middle frame, the suspension rod is fixedly connected to the middle of the cross bar and arranged vertically downward, and the rope-supporting pulley is arranged at the bottom of the rope-supporting pulley suspension frame; There are two cross bars arranged side by side, there are also two suspension rods arranged side by side, and the rope supporting pulley is arranged between the two suspension rods.

2. A lifting system utilizing the tower crane rope supporting device as claimed in claim 1, comprising a lifting mechanism, a lifting wire rope, a rope supporting device, a luffing mechanism and a lifting trolley, wherein the luffing mechanism is provided with a luffing wire rope passing through and connecting the rope supporting device and the lifting trolley, the lifting wire rope passes through the lifting mechanism and the rope supporting device in turn and is connected to the lifting trolley, and the wire ropes on both sides of the lifting trolley are symmetrically arranged.

3. A tower crane hoisting system according to claim 2, characterized in that: The luffing mechanism is provided with a plurality of luffing traction rollers to pull and fix the luffing steel wire rope.

4. A tower crane hoisting system according to claim 2, characterized in that: The lifting trolley includes a frame, a traction pulley block, a lifting pulley block and a hook. The variable-length steel wire rope passes through the traction pulley block to fix the frame at the same horizontal line as the rope supporting device. The traction pulley block is fixed to the middle of the frame. The hook is arranged directly below the lifting pulley block. The lifting pulley block includes three pulleys arranged in a triangle. After passing through one side pulley of the traction pulley block, the variable-length steel wire rope is connected to the lower pulley in the lifting pulley block and then connected to the other side pulley of the traction pulley block. The lifting steel wire rope passes through one side pulley of the traction pulley block and is connected to the upper pulley in the lifting pulley block.

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