Working method of a multi-functional tower crane system integrated with an electric grab

Abstract

The present invention relates to a working method of a multi-functional tower crane system integrated with an electric grab, which belongs to the grab technology field of tower cranes. The tower crane system of the present invention includes a slewing platform, an electric grab, a wire winder, a tower crane hook, a display screen, a programmable logic controller, and four operation buttons installed in the cab. When the tower crane function is used during the operation of the present invention, the electric grab is not used and is hung under the slewing platform; when the grab function is used, the tower crane hook moves to the lifting ring to lift out the grab, and at the same time, the cable connected to the electric grab is released through a button. The driver controls the rotation of the drum through two buttons in the cab and drives the structure through the wire rope to control the opening and closing of the grab. The opening and closing limit positions are transmitted to the PLC through the limit switch and displayed on the display screen to prompt the driver. The structure of the present invention is reasonably designed, safe and reliable, with the addition of the electric grab function, convenient operation, intelligent, and meeting the use requirements.

Description

Technical Field

[0001] The invention relates to a working method, in particular to a working method of a multifunctional tower crane system integrated with an electric grab bucket, and belongs to the technical field of grab buckets of tower cranes. Background Art

[0002] The functional characteristics of existing tower cranes cannot lift loose objects in the working environment, such as scattered wood, scattered steel, scattered bricks, soil, empty concrete, etc. on construction sites, and they need to use other machines. However, due to the limitations of the working environment, the working position and range of those machines are often unable to be completed.

[0003] Therefore, it is particularly necessary to provide a multifunctional tower crane system with reasonable structural design, safety and reliability, increased electric grab function, and easy operation. Summary of the invention

[0004] The purpose of the present invention is to overcome the above-mentioned deficiencies in the prior art and to provide a working method of a multifunctional tower crane system with an integrated electric grab bucket which has a reasonable structural design, is safe and reliable, has an added electric grab bucket function, is easy to operate, and is intelligent.

[0005] The technical solution adopted by the present invention to solve the above-mentioned problem is: the working method of the multifunctional tower crane system with integrated electric grab comprises a multifunctional tower crane system, the multifunctional tower crane system comprises a rotating platform, an electric grab, a winding machine, a tower crane hook, a display screen, a programmable controller and four operation buttons installed in the cab, the winding machine is installed below the rotating platform, the electric grab comprises a lifting ring, a wire rope, a motor, a transmission shaft, an open state limit, a closed state limit and a grab, the electric grab is hung below the rotating platform through the lifting ring, the grab is fixedly connected to the lower end of the wire rope, the drum of the wire rope is connected to the motor, the open state limit and the closed state limit are arranged on both sides of the top of the grab, the middle two sides of the grab are respectively hinged with the transmission shaft, and the transmission shaft is connected to the motor in a corresponding transmission manner, and the characteristic is that it comprises the following steps:

[0006] (S1) The current trolley amplitude, hook height and wire length are displayed on the display screen. The trolley amplitude and hook height are transmitted to the programmable controller through the amplitude height sensor of the tower crane and then transmitted to the display screen for display; the wire length is transmitted to the programmable controller by the winding machine, and then transmitted to the display screen by the programmable controller for display;

[0007] (S2) A cable winding machine is used for winding and releasing the grab bucket cable, and the cable winding machine includes a cable placing rack, a cable drum, a reducer, a motor, a cable numbering machine and an automatic cable counter;

[0008] (S3) Four operating buttons control the forward and reverse rotation of the winding machine motor and the forward and reverse rotation of the electric grab bucket motor respectively;

[0009] (S4) When the tower crane function is used, the electric grab is not used and is hung under the slewing platform.

[0010] (S5) When the grab function is used, the tower crane hook moves to the lifting ring to lift out the grab. At the same time, the cable connected to the electric grab is released through a button. It is judged through the display screen that the released cable length should be greater than or equal to the change value of the sum of the radius and the height. When the electric grab reaches the required position, the driver controls the opening and closing of the grab through two buttons in the cab. The opening and closing limit positions are transmitted to the programmable logic controller through limit switches and are displayed on the display screen to prompt the driver.

[0011] Compared with the prior art, the present invention has the following advantages and effects: The overall structure is reasonably designed. On the basis of the ordinary tower crane function, the grab function is added, making the machine dual-purpose, which has good practicability for complex working conditions such as construction sites. It integrates the display of radius, height, wire length, and grab opening and closing, and an intelligent system for controlling the retraction and extension of the wire and the opening and closing of the grab through buttons. BRIEF DESCRIPTION OF THE DRAWINGS

[0012] Figure 1 is the overall structural schematic diagram of an embodiment of the present invention.

[0013] Figure 2 is the structural schematic diagram of the electric grab in an embodiment of the present invention.

[0014] In the figure: slewing platform 1, electric grab 2, winch 3, tower crane hook 4; lifting ring 21, wire rope 22, motor 23, transmission shaft 24, open state limit 25, closed state limit 26, grab 27. DETAILED DESCRIPTION OF THE EMBODIMENTS

[0015] The present invention will be further described in detail below with reference to the drawings and through embodiments. The following embodiments are explanations of the present invention and the present invention is not limited to the following embodiments.

[0016] Embodiment

[0017] Refer to Figures 1 to 2 , the multi-functional tower crane system integrating an electric grab in this embodiment mainly includes a slewing platform 1, an electric grab 2, a winch 3, a tower crane hook 4, a display screen, a programmable logic controller (PLC), and four operation buttons installed in the cab.

[0018] In this embodiment, the wire reel 3 is installed below the slewing platform 1. The electric grab 2 includes a lifting ring 21, a steel wire rope 22, a motor 23, a transmission shaft 24, an open state limit 25, a closed state limit 26, and a grab 27. The electric grab 2 is hung below the slewing platform 1 through the lifting ring 21. The lower end of the steel wire rope 22 is fixedly connected with the grab 27. The reel of the steel wire rope 22 is connected to the motor 23. The open state limit 25 and the closed state limit 26 are arranged on both sides of the top of the grab 27. The two sides of the middle of the grab 27 are respectively hinged corresponding to the transmission shaft 24, and the transmission shaft 24 is in corresponding transmission connection with the motor 23.

[0019] The specific steps of the multi-functional tower crane system integrating the electric grab in this embodiment are as follows:

[0020] (1) This system includes a display screen, a programmable logic controller (PLC), a set of electric grabs 2, a set of wire reels 3, and four operation buttons installed in the cab.

[0021] (2) The display screen displays the current trolley amplitude, hook height, and wire length. Among them, the trolley amplitude and hook height are the ones inherent in the tower crane and are transmitted to the PLC by the amplitude and height sensors and then to the display screen for display. The wire length is transmitted from the wire reel to the PLC and then the PLC transmits it to the display screen for display.

[0022] (3) The electric grab includes a grab structure and a control device, including a motor, a reel, a steel wire rope, a reducer, and also includes a limit for feedback on the opening and closing of the grab.

[0023] (4) The wire reel 3 is installed below the slewing platform 1 and is used for winding and unwinding the grab cable. The wire reel 3 includes a cable placement rack, a cable reel, a reducer, a motor, a cable numbering machine, and a cable automatic counter.

[0024] (5) The four operation buttons installed in the cab respectively control the forward and reverse rotations of the motor of the wire reel 3 and the forward and reverse rotations of the motor of the electric grab 2.

[0025] (6) When using the tower crane function, the electric grab 2 is not used and is hung below the slewing platform through the lifting ring;

[0026] When using the grab function, the tower crane hook moves to the lifting ring 21 to lift out the grab. At the same time, the cable connected to the electric grab 2 is released through the button. Through the display screen judgment, the released cable length should be greater than or equal to the change value of the sum of the amplitude and height. When the electric grab 2 reaches the required position, the driver controls the opening and closing of the grab through two buttons in the cab. The opening and closing limit positions are transmitted to the PLC through the limit and displayed on the display screen to prompt the driver.

[0027] In this embodiment, when the tower crane function needs to be used, control the tower crane hook 4 to place the grab back at the lifting ring 21 and at the same time control the wire reel 3 to retract the cable.

[0028] Based on the above description, those skilled in the art can already implement it.

[0029] In addition, it should be noted that for the specific embodiments described in this specification, the shapes, names, etc. of the components can be different. The above content described in this specification is only an example of the structure of the present invention. Any equivalent changes or simple changes made according to the structure, features, and principles described in the inventive concept of this patent are included in the protection scope of this patent. Those skilled in the technical field to which the present invention pertains can make various modifications, supplements, or use similar methods for substitution to the specific embodiments described, as long as they do not deviate from the structure of the present invention or exceed the scope defined by this claims, they should fall within the protection scope of the present invention.

Claims

1. A method for operating a multifunctional tower crane system integrated with an electric grab, comprising a multifunctional tower crane system, wherein the multifunctional tower crane system comprises a slewing platform (1), an electric grab (2), a wire winder (3), a tower crane hook (4), a display screen, a programmable controller, and four operation buttons installed in a cab, wherein the wire winder (3) is installed below the slewing platform (1), and the electric grab (2) comprises a lifting ring (21), a steel wire rope (22), a motor (23), a transmission shaft (24), an open state limiter (25 ), a closed state limit (26) and a grab (27), the electric grab (2) is hung below the rotary platform (1) through a lifting ring (21), the grab (27) is fixedly connected to the lower end of the wire rope (22), the drum of the wire rope (22) is connected to the motor (23), the top two sides of the grab (27) are provided with an open state limit (25) and a closed state limit (26), the middle two sides of the grab (27) are respectively hinged to the transmission shaft (24), the transmission shaft (24) and the motor (23) are correspondingly connected in transmission, It is characterized in that: The steps include: (S1) Displaying the current trolley amplitude, hook height and wire length on the display screen. The trolley amplitude and hook height are transmitted to the programmable controller through the amplitude height sensor of the tower crane and then transmitted to the display screen for display; The wire length is transmitted by the winding machine (3) to the programmable controller, and then the programmable controller transmits it to the display screen for display; (S2) A cable winding machine (3) is used for winding and releasing the grab bucket cable, and the cable winding machine (3) comprises a cable placing rack, a cable drum, a reducer, a motor, a cable numbering machine and an automatic cable counter; (S3) Four operating buttons respectively control the forward and reverse rotation of the motor of the winding machine (3) and the forward and reverse rotation of the motor of the electric grab bucket (2); (S4) When the tower crane function is used, the electric grab is not used and the electric grab is hung under the slewing platform; (S5) When the grab function is used, the tower crane hook (4) moves to the lifting ring (21) to lift out the grab, and at the same time, the cable connected to the electric grab (2) is released by pressing a button. The display screen determines that the length of the released cable should be greater than or equal to the change value of the sum of the amplitude and the height. When the electric grab (2) reaches the required position, the driver controls the opening and closing of the grab by pressing two buttons in the cab. The opening and closing limit positions are transmitted to the programmable controller through the limit position, and are displayed on the display screen to prompt the driver.

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