CN214935573U

CN214935573U - Overload protection rocker tower crane

Info

Publication number: CN214935573U
Application number: CN202120478280.2U
Authority: CN
Inventors: 李维波; 张刊; 沈国仁; 楼玉川; 缪锦锦
Original assignee: Zhejiang Construction Engineering Machinery Group Co Ltd
Current assignee: Zhejiang Construction Engineering Machinery Group Co Ltd
Priority date: 2021-03-05
Filing date: 2021-03-05
Publication date: 2021-11-30
Anticipated expiration: 2031-03-05

Abstract

The utility model discloses a rocking arm tower machine of overload protection, including the tower machine body, the tower machine body includes tower body and jib loading boom, jib loading boom one end is articulated with the tower body, becomes the width of cloth through becoming the width of cloth device between jib loading boom and the tower body, becomes width of cloth device electric connection PLC treater, become width of cloth device and include hoist engine, first pulley, second pulley, third pulley, fourth assembly pulley and fifth assembly pulley, the hoist engine passes through wire rope and is connected with first pulley, second pulley, third pulley, fourth assembly pulley and fifth assembly pulley, PLC treater electric connection torque sensor, torque sensor sets up on the fifth assembly pulley. The utility model discloses a become width of cloth motion of width of cloth device control jib loading boom, detect moment when too big through torque sensor, transfer through PLC treater control jib loading boom, prevent that moment from too big causing the damage to the jib loading boom.

Description

Overload protection rocker tower crane

Technical Field

The utility model relates to a tower machine technical field, concretely relates to overload protection's rocking arm tower machine.

Background

The tower crane is the most common hoisting equipment on the construction site, is called as a tower crane, is lengthened section by section (called as a standard section for short) and is used for hoisting construction raw materials such as reinforcing steel bars, wood ridges, concrete, steel pipes and the like for construction, and the tower crane is an essential equipment on the construction site.

At present, when a common tower crane works, the common tower crane only gives an alarm when a hanging object is overloaded, a crane boom needs to be manually controlled by a driver to be lowered, when a system gives an alarm, the driver can feel nervous, and the crane boom is easy to make mistakes when being operated.

SUMMERY OF THE UTILITY MODEL

For solving above technical problem, the utility model provides a rocker arm tower machine of overload protection, moment sensor detects moment when too big, transfers through PLC treater control jib loading boom, prevents that moment is too big to cause the damage to the jib loading boom.

The utility model adopts the following technical scheme:

a rocker arm tower crane with overload protection comprises a tower crane body, wherein the tower crane body comprises a tower body and a cargo boom, one end of the cargo boom is hinged with the tower body, the cargo boom and the tower body are subjected to amplitude variation through an amplitude variation device, the amplitude variation device is electrically connected with the PLC processor, the amplitude variation device comprises a winch, a first pulley, a second pulley, a third pulley, a fourth pulley block and a fifth pulley block, the winch is connected with the first pulley, the second pulley, the third pulley, the fourth pulley block and the fifth pulley block through steel wire ropes, the first pulley is arranged at the lower end of the tower body, the second pulley is arranged on the tower body, the third pulley is arranged at the hinged position of the crane boom and the tower body, the fourth pulley block is arranged at the other end of the crane boom, the fifth pulley block is arranged at the upper end of the tower body, the PLC processor is electrically connected with the torque sensor, and the torque sensor is arranged on the fifth pulley block.

Preferably, the fourth pulley block comprises three pulleys, the three pulleys are connected through a first connecting shaft, the fifth pulley block comprises two pulleys, and the two pulleys are connected through a second connecting shaft.

Preferably, one end of the steel wire rope is connected to the winch, and the other end of the steel wire rope sequentially winds the first pulley, the second pulley and the third pulley and winds the fourth pulley block and the fifth pulley block to be fixed on the second connecting shaft.

Preferably, the winch is installed on the ground.

Preferably, the first pulley and the second pulley are arranged on the same side of the tower body.

Preferably, the tower body is provided with a first hinge lug, the crane boom is provided with a second hinge lug at a corresponding position, and the hinge shaft penetrates through the first hinge lug and the second hinge lug to hinge the first hinge lug and the second hinge lug.

Preferably, the crane arm is further provided with a lifting hook assembly.

Compared with the prior art, the utility model has the advantages of it is following:

1. when the moment sensor detects that the moment is too large, the crane boom is controlled to be lowered through the PLC processor, and the crane boom is prevented from being damaged due to the fact that the moment is too large.

2. The crane boom is controlled by the amplitude variation device to perform amplitude variation motion, the direction of the steel wire rope is adjusted by using the first pulley, the second pulley, the third pulley, the fourth pulley block and the fifth pulley block, and meanwhile, the stability can also be enhanced.

3. When the lifting object is not determined to be overweight, the crane boom is put down by the ground winch, and then the lifting object is lifted to slowly lift the crane boom.

Drawings

FIG. 1 is a schematic diagram of the overall structure of a swing arm tower crane.

Fig. 2 is a partially enlarged view of a portion a of fig. 1.

Fig. 3 is a schematic structural diagram of a luffing device.

Fig. 4 is a schematic winding diagram of the fourth pulley block and the fifth pulley block.

FIG. 5 is a schematic circuit connection diagram of the swing arm tower crane.

In the figure, the tower crane comprises a tower crane body 1, a tower body 11, a first hinge lug 111, a crane boom 12, a second hinge lug 121, a hinge shaft 13, a hook assembly 14, a luffing device 2, a winch 21, a first pulley 22, a second pulley 23, a third pulley 24, a fourth pulley block 25, a first connecting shaft 251, a fourth pulley block a252, a fourth pulley block B253, a fourth pulley block C254, a fifth pulley block 26, a second connecting shaft 261, a fifth pulley a262, a fifth pulley B263, a steel wire rope 27, a PLC processor 3 and a torque sensor 4.

Detailed Description

In order to facilitate understanding of the technical solutions of the present invention, the following detailed description is made with reference to the accompanying drawings and specific embodiments.

Example 1

As shown in fig. 1 to 5, an overload protection rocker arm tower crane comprises a tower crane body 1, wherein the tower crane body 1 comprises a tower body 11 and a cargo boom 12, one end of the cargo boom 12 is hinged to the tower body 11 to facilitate up-and-down amplitude movement, amplitude variation is performed between the cargo boom 12 and the tower body 11 through an amplitude variation device 2, the amplitude variation device 2 is electrically connected to a PLC processor 3, the PLC processor 3 is used to control the amplitude variation device 2 to work to drive the cargo boom 12 to perform amplitude variation, the amplitude variation device 2 comprises a winch 21, a first pulley 22, a second pulley 23, a third pulley 24, a fourth pulley block 25 and a fifth pulley block 26, the winch 21 is connected with the first pulley 22, the second pulley 23, the third pulley 24, the fourth pulley block 25 and the fifth pulley block 26 through a steel wire rope 27, the first pulley 22 is arranged at the lower end of the tower body 11, and the second pulley 23 is arranged at the upper end of the tower body 11, The third pulley 24 is arranged at the hinged position of the crane boom 12 and the tower body 11, the fourth pulley block 25 is arranged at the other end of the crane boom 12, the fifth pulley block 26 is arranged at the upper end of the tower body 11, the PLC 3 is electrically connected with the torque sensor 4, and the torque sensor 4 is arranged on the fifth pulley block 26. The moment sensor 4 is used for detecting the current moment, and when the moment sensor 4 detects that the moment is too large, the PLC processor 3 controls the crane boom 12 to be lowered, so that the crane boom 12 is prevented from being damaged due to the too large moment.

One end of the steel wire rope 27 is connected to the winch 21, and the other end of the steel wire rope 27 sequentially passes around the first pulley 22, the second pulley 23 and the third pulley 24 and is fixed on the second connecting shaft 261 by winding the fourth pulley block 25 and the fifth pulley block 26, specifically, the steel wire rope 27 extends out of the winch 21, surrounds and is attached to the left side of the second pulley 23 from the right side to the left side of the first pulley 22, surrounds and extends upwards from the left side to the right side of the second pulley 23, extends to the right side of the third pulley 24 and surrounds the left side, extends upwards in an inclined manner to be attached to the left side of the fourth pulley block 25, passes through the upper portion of the fourth pulley block 25, and extends and is fixed on the fifth pulley block 26 which is located below to the right. Specifically, the fourth pulley block 25 includes three fourth pulleys connected by a first connecting shaft 251, the three fourth pulleys are a fourth pulley block a252, a fourth pulley block B253, and a fourth pulley block C254, the fifth pulley block 26 includes two fifth pulleys connected by a second connecting shaft 261, and the two fifth pulleys are a fifth pulley a262 and a fifth pulley B263. The wire rope 27 is attached to the left side of the fourth pulley block 25, passes over the fourth pulley block a252, sequentially passes over the upper side, the right side and the lower side of the fifth pulley a262, sequentially passes through the left side to the fourth pulley block B253, sequentially passes through the lower side, the left side and the upper side of the fourth pulley block B253, sequentially passes through the right side to the fifth pulley B263, sequentially passes through the upper side, the right side and the lower side of the fifth pulley B263, sequentially passes through the left side to the fourth pulley block C254, sequentially passes through the lower side, the left side and the upper side of the fourth pulley block C254, sequentially passes through the right side to the second connecting shaft 261, and is fixedly connected to the second connecting shaft 261. At this time, the hoist 21 is rotated, and the boom 12 can be controlled in amplitude by the wire rope 27. The wire rope 27 is wound between the fourth pulley block 25 and the fifth pulley block 26 for three times, so that the stability of the wire rope 27 can be enhanced, namely, the moment of the crane boom 12 is distributed to the three wire ropes 27, and the breakage is prevented.

The winch 21 is arranged on the ground, so that the installation is convenient, and meanwhile, the influence of the vibration of the tower crane in the working process on the winch 21 can be prevented.

First pulley 22 and second pulley 23 set up same side on body of the tower 11, in this embodiment, all set up in the right side of body of the tower 11, prevent wire rope 27 length overlength, increase friction.

The tower body 11 is provided with a first hinge lug 111, the boom 12 is provided with a second hinge lug 121 at a corresponding position, and the hinge shaft 13 passes through the first hinge lug 111 and the second hinge lug 121 to hinge the first hinge lug 111 and the second hinge lug 121. The crane arm 12 is further provided with a hook assembly 14, and goods are lifted and lowered through the hook assembly 14.

When the utility model is used, a threshold value is set for the moment on the PLC processor 3, the winch 21 on the ground is controlled to pull the steel wire rope 27 to perform amplitude variation motion on the cargo boom 12, after the cargo is hoisted by the hook component 14, the PLC processor 3 judges that the moment is close to the threshold value (whether the moment is overweight or not can not be accurately judged), then the winch 21 reverses, the cargo is put down, and the cargo boom 12 is slowly hoisted again; if the torque value transmitted to the PLC processor 3 by the torque sensor 4 of the tower crane in the lifting process reaches the critical value, the PLC processor 3 sends a command to the ground winch 21 to enable the cargo boom 12 to be quickly lowered to protect the tower crane.

The above is only the preferred embodiment of the present invention, and the protection scope of the present invention is defined by the scope defined by the claims, and a plurality of modifications and decorations made by those skilled in the art without departing from the spirit and scope of the present invention should also be regarded as the protection scope of the present invention.

Claims

1. The overload protection rocker arm tower crane is characterized by comprising a tower crane body (1), wherein the tower crane body (1) comprises a tower body (11) and a cargo boom (12), one end of the cargo boom (12) is hinged to the tower body (11), the cargo boom (12) and the tower body (11) are in amplitude variation through an amplitude variation device (2), the amplitude variation device (2) is electrically connected with a PLC (programmable logic controller) processor (3), the amplitude variation device (2) comprises a winch (21), a first pulley (22), a second pulley (23), a third pulley (24), a fourth pulley block (25) and a fifth pulley block (26), the winch (21) is connected with the first pulley (22), the second pulley (23), the third pulley (24), the fourth pulley block (25) and the fifth pulley block (26) through a steel wire rope (27), the first pulley (22) is arranged at the lower end of the tower body (11), the second pulley (23) is arranged on the tower body (11), the third pulley (24) is arranged on the crane boom (12) and hinged to the tower body (11), the fourth pulley block (25) is arranged at the other end of the crane boom (12), the fifth pulley block (26) is arranged at the upper end of the tower body (11), the PLC processor (3) is electrically connected with the torque sensor (4), and the torque sensor (4) is arranged on the fifth pulley block (26).

2. Overload protection rocker tower crane according to claim 1, characterised in that the fourth set of pulleys (25) comprises three fourth pulleys connected by a first connection shaft (251), and the fifth set of pulleys (26) comprises two fifth pulleys connected by a second connection shaft (261).

3. The swing arm tower crane with overload protection as claimed in claim 2, wherein one end of the steel wire rope (27) is connected to the winch (21), and the other end of the steel wire rope sequentially passes around the first pulley (22), the second pulley (23) and the third pulley (24) and is wound around the fourth pulley block (25) and the fifth pulley block (26) to be fixed on the second connecting shaft (261).

4. Overload protection rocker tower crane according to claim 1, characterised in that the hoisting machine (21) is arranged on the ground.

5. Overload protection rocker tower crane according to claim 1, characterised in that the first pulley (22) and the second pulley (23) are arranged on the same side of the tower (11).

6. The overload protection rocker tower crane as recited in claim 1, wherein the tower body (11) is provided with a first hinge lug (111), the crane boom (12) is provided with a second hinge lug (121) at a corresponding position, and the hinge shaft (13) passes through the first hinge lug (111) and the second hinge lug (121) to hinge the first hinge lug (111) and the second hinge lug (121).

7. Overload protection rocker tower crane according to claim 1, characterised in that the lifting arm (12) is further provided with a hook assembly (14).