Novel waist rope and crane

Abstract

The utility model discloses a novel waist rope and a crane, the waist rope comprises a first pulley yoke, a second pulley yoke, a first pulley block installed on the first pulley yoke, a second pulley block installed on the second pulley yoke, a steel wire rope and a stringing winch, one side of the first pulley yoke is connected with a main arm pulling plate, one side of the second pulley yoke is connected with an arm support, and the other side of the first pulley yoke is connected with a main arm pulling plate. Each of the first pulley block and the second pulley block comprises a plurality of pulleys, the steel wire rope is alternately wound on the pulleys of the first pulley block and the second pulley block, and one end of the steel wire rope is connected with the stringing winch; a tension sensor is further arranged on the steel wire rope, and the rope penetrating winch controls winding and unwinding of the steel wire rope according to a tension value detected by the tension sensor. The stress state of the waist rope is adjusted along with the arm rising state, the problem of reverse deflection of the arm support in the arm rising process is solved, and the performance and safety of the arm support are improved.

Description

Technical Field

[0001] The utility model relates to the technical field of lifting equipment, in particular to a novel waist rope and a crane. Background Art

[0002] Crawler cranes are widely used in the fields of construction, petrochemicals and wind turbine installation. With the rapid development of science and technology and economy in my country, the boom length of crawler cranes has been increasing to meet the increasing demand for lifting height. At present, the use of longer booms is becoming more and more common. In order to reduce the bending degree of the main boom and prevent excessive deflection of the main boom, the use of waist ropes is a reasonable and effective measure. Figure 1 As shown, the existing waist rope includes a pull plate 1, a cable 2 and a chain 3, etc. When in use, one end is connected to the boom, and the other end is connected to the main arm pull plate. However, this waist rope structure cannot adjust the stress state according to the boom raising process during actual use, and cannot change with the angle of the main boom and the pull plate. If the waist rope is loose, the boom may bend upward, that is, the deflection. This situation is very destructive to the boom. In severe cases, unexpected situations such as arm section breakage may occur, and casualties may also occur. In addition, poor stress on the waist rope will also prevent the waist rope from playing a good role. Utility Model Content

[0003] Purpose of the invention: In view of the shortcoming that the existing waist rope cannot adjust the stress state according to the arm raising process, the utility model provides a new waist rope and crane.

[0004] Technical solution: To solve the above problems, the utility model adopts a new waist rope, including a first pulley frame, a second pulley frame, a first pulley group installed on the first pulley frame, a second pulley group installed on the second pulley frame, a wire rope, and a rope threading winch. One side of the first pulley frame is connected to the main arm pull plate, and one side of the second pulley frame is connected to the arm frame. The first pulley group and the second pulley group both include a plurality of pulleys. The wire rope is alternately wound around the pulleys of the first pulley group and the second pulley group, and one end of the wire rope is connected to the rope threading winch. A tension sensor is also provided on the wire rope.

[0005] Furthermore, the other end of the steel wire rope is fixed to the first pulley frame or the second pulley frame.

[0006] Furthermore, the first pulley frame is connected to the main arm pull plate by a pin shaft, and the second pulley frame is also connected to the arm frame by a pin shaft.

[0007] Furthermore, the rope threading winch controls the retraction and release of the steel wire rope according to the tension value detected by the tension sensor.

[0008] The utility model also provides the crane, which uses the novel waist rope.

[0009] Furthermore, the crane is provided with a guide pulley and a rope-threading winch, and the steel wire rope passes through the guide pulley and is connected to the rope-threading winch.

[0010] Furthermore, the guide pulley is arranged on the crane boom, and the rope threading winch is arranged on the crane mainframe.

[0011] Beneficial effects: Compared with the prior art, the significant advantages of the utility model are: (1) the waist rope can adjust the stress state according to the arm raising state, which solves the problem of arm frame deflection during the arm raising process and improves the performance and safety of the arm frame; (2) the number of pulleys can be adjusted according to specific working conditions to improve the applicability of the waist rope; (3) the stress condition is measured by a tension sensor, and the wire rope is controlled to be retracted and released according to the measured tension, so as to achieve precise control of the waist rope retraction and release, and further improve the performance of the waist rope and the arm frame. BRIEF DESCRIPTION OF THE DRAWINGS

[0012] Figure 1 It is a schematic diagram of the overall structure of the existing waist rope;

[0013] Figure 2 This is a schematic diagram of the overall structure of the waist rope of the utility model;

[0014] Figure 3 It is a schematic diagram of the overall structure of the crane of the utility model;

[0015] Figure 4 It is a structural schematic diagram of the guide pulley of the utility model. DETAILED DESCRIPTION

[0016] like Figures 2 to 4 As shown, a new waist rope 7 in this embodiment includes a first pulley frame 71, a second pulley frame 72, a first pulley group 73, a second pulley group 74, a wire rope 5, and a rope pulling winch 4. The first pulley group 73 is installed on the first pulley frame 71, and the second pulley group 74 is installed on the second pulley frame 72. A connecting member 75 is provided on one side of the first pulley frame 71, which is connected to the main arm pull plate 8 through a pin shaft, and a connecting member 76 is provided on one side of the second pulley frame 72, which is connected to the boom through a pin shaft. Each pulley group is provided with a plurality of pulleys 721 of the same number, and one end of the wire rope 5 is fixed on the second pulley frame 72 and alternately wound on the pulleys of the first pulley group 73 and the second pulley group 74. A guide pulley 6 is provided on the crane boom, and the other end of the wire rope 5 passes through the guide pulley and is connected to the rope pulling winch 4, and the rope pulling winch 4 is provided on the slewing bearing of the crane mainframe. A tension sensor is also provided on the steel wire rope 5, and the rope threading winch 4 controls the retraction and extension of the steel wire rope 5 according to the tension value detected by the tension sensor.

[0017] The number of pulleys in the pulley block can be set according to the specific tension requirements. For example, if the tension on the waist rope is 60t, when 5 pulleys are set in each pulley block, the tension ratio is 6 times, and the tension on the wire rope 5 is 10t. According to the above tension requirements, when the tension sensor detects that the tension is greater than 10t, the rope pulling winch 4 will act and loosen the rope pulling winch wire rope 5 until the tension reaches 10t; conversely, the rope pulling winch 4 will act and reel in the rope pulling winch wire rope 5. The waist rope structure of the utility model realizes that the waist rope adjusts the stress state with the arm raising state, solves the problem of the arm frame deflection during the arm raising process, and improves the performance and safety of the arm frame; the number of pulleys can be adjusted according to the specific working conditions to improve the applicability of the waist rope; the stress condition is measured by the tension sensor, and the wire rope is controlled to be retracted and released according to the measured tension, so as to realize the precise control of the waist rope retraction and release, and further improve the performance of the waist rope and the arm frame.

Claims

1. A new waist rope, characterized in that: The invention comprises a first pulley frame (71), a second pulley frame (72), a first pulley group (73) installed on the first pulley frame (71), a second pulley group (74) installed on the second pulley frame (72), a steel wire rope (5), and a rope-threading winch (4); one side of the first pulley frame (71) is connected to a main arm pull plate, one side of the second pulley frame (72) is connected to an arm frame, the first pulley group (73) and the second pulley group (74) both comprise a plurality of pulleys (721), the steel wire rope (5) is alternately wound around the pulleys of the first pulley group (73) and the second pulley group (74), one end of the steel wire rope (5) is connected to the rope-threading winch (4); and a tension sensor is also provided on the steel wire rope (5).

2. The novel waist rope according to claim 1, characterized in that: The other end of the steel wire rope (5) is fixed on the first pulley frame (71) or the second pulley frame (72).

3. The novel waist rope according to claim 1, characterized in that: The first pulley frame (71) is connected to the main arm pull plate by a pin shaft, and the second pulley frame (72) is also connected to the arm frame by a pin shaft.

4. The novel waist rope according to claim 1, characterized in that: The rope threading winch (4) controls the retraction and extension of the steel wire rope (5) according to the tension value detected by the tension sensor.

5. A crane, characterized in that: Use the new waist rope as described in any one of claims 1-4.

6. The crane according to claim 5, characterized in that The crane is provided with a guide pulley (6) and a rope-threading winch (4), and the steel wire rope (5) passes through the guide pulley and is connected to the rope-threading winch (4).

7. The crane according to claim 6, characterized in that The guide pulley (6) is arranged on the crane boom, and the rope threading winch (4) is arranged on the crane mainframe.

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