CN213950376U

CN213950376U - Crane device with overload self-discharging function

Info

Publication number: CN213950376U
Application number: CN202023007497.XU
Authority: CN
Inventors: 曾宁春; 刘佳斌; 赵云; 陈东标; 罗斌飞; 晏勇斌
Original assignee: Jiangxi Zhongtian Intelligent Equipment Co Ltd
Current assignee: Jiangxi Zhongtian Intelligent Equipment Co Ltd
Priority date: 2020-12-15
Filing date: 2020-12-15
Publication date: 2021-08-13
Anticipated expiration: 2030-12-15

Abstract

The utility model discloses a hoist device with overload self-discharging function, including the linkage platform, hoisting mechanism and the play to rise motor of control hoisting mechanism operation, still include programmable controller, converter and communication card, the linkage platform is with programmable controller's input electric connection, hoisting mechanism is provided with current encoder and torque coder, current encoder and torque coder and the input electric connection of communication card, the output of communication card and programmable controller's input electric connection, programmable controller's output and the input electric connection of converter, the output of converter and the control end electric connection who plays to rise the motor. The utility model aims to solve hoist hoisting mechanism and hang another object because of the accident at rising or decline in-process, cause to rise and be accompanied other loads, surpass the biggest load capacity that allows even, cause the hoist to tumble or the girder steel breaks, finally cause the problem of serious incident.

Description

Crane device with overload self-discharging function

Technical Field

The utility model relates to a hoisting equipment technical field specifically is a crane device with overload self-discharging function.

Background

The crane is a multi-action hoisting machine for vertically lifting and horizontally carrying heavy objects in a certain range, and has wide application. When a hoisting mechanism of a crane ascends or descends, a condition that a hoisted object or a hoisted object is hung on another object accidentally sometimes occurs for some reason, and if a crane driver does not notice the condition and continues to operate the hoisting mechanism to ascend or descend, other loads are attached to the hoisting, even the allowable maximum load capacity is exceeded, so that the crane is overturned or a steel beam is broken, and finally serious safety accidents are caused.

SUMMERY OF THE UTILITY MODEL

An object of the utility model is to provide a hoist device with overload self-discharging function to solve the hoist hoisting mechanism who provides in the above-mentioned background art and hang another object because of the accident at rising or decline in-process, cause to rise and be accompanied other loads, exceed the maximum carrying capacity that allows even, cause the hoist to tumble or the girder steel breaks, finally cause the problem of serious incident.

In order to achieve the above object, the utility model provides a following technical scheme:

the crane device with the overload self-discharging function comprises a linkage table, a lifting mechanism, a lifting motor for controlling the lifting mechanism to operate, a programmable logic controller, a frequency converter and a communication card, wherein the linkage table is electrically connected with the input end of the programmable logic controller, the lifting mechanism is provided with a current encoder and a torque encoder, the current encoder and the torque encoder are electrically connected with the input end of the communication card, the output end of the communication card is electrically connected with the input end of the programmable logic controller, the output end of the programmable logic controller is electrically connected with the input end of the frequency converter, and the output end of the frequency converter is electrically connected with the control end of the lifting motor.

Furthermore, the communication card is a PROFIBUS communication card adopting a PROFIBUS communication protocol.

Further, the current encoder and the torque encoder are incremental encoders.

Compared with the prior art, the beneficial effects of the utility model are that:

the hoisting mechanism is provided with a current encoder and a torque encoder, current signals and torque signals are transmitted to the programmable controller through the PROFIBUS communication card, when a lifted object or the lifted object is hung on another object accidentally, the current signals and the torque signals can be increased suddenly and continuously, when the current signals and the torque signals exceed an allowable value, the programmable controller immediately outputs signals to the frequency converter to force the hoisting motor to stop running, the situation that the crane is tipped over or the steel beam is broken due to overload running of the crane is avoided, the use safety of the crane is improved, and the safety of personnel and objects is guaranteed.

Drawings

FIG. 1 is a schematic structural view of the present invention;

in the figure: the system comprises a linkage table 1, a lifting mechanism 2, a lifting motor 3, a programmable controller 4, a frequency converter 5, a communication card 6, a current encoder 7 and a torque encoder 8.

Detailed Description

The present invention will be described in detail below with reference to the accompanying drawings and specific embodiments.

Referring to fig. 1, the present invention provides an embodiment: the utility model provides a hoist device with overload self-discharging function, including linkage platform 1, hoisting mechanism 2 and the lifting motor 3 of control hoisting mechanism 2 operation, still include programmable controller 4, converter 5, communication card 6, current encoder 7 and torque encoder 8, linkage platform 1 and programmable controller 4's input electric connection, hoisting mechanism 2 is provided with current encoder 7 and torque encoder 8, current encoder 7 and torque encoder 8 and communication card 6's input electric connection, communication card 6's output and programmable controller 4's input electric connection, programmable controller 4's output and converter 5's input electric connection, converter 5's output and lifting motor 3's control end electric connection.

The communication card 6 is a PROFIBUS communication card adopting a PROFIBUS communication protocol, the PROFIBUS communication protocol is an industrial automation bus communication protocol, and is widely applied to various industrial automation fields, not only suitable for communication between an automation system and a field signal unit, but also suitable for being directly connected with a transmitter with an interface, an actuator, a transmission device and other field instruments and equipment to collect and monitor field signals, and a pair of twisted-pair wires replaces a large amount of traditional transmission cables, so that the cost of the cables is greatly saved, and the maintenance time and cost after construction debugging and system commissioning are correspondingly saved.

The current encoder 7 and the torque encoder 8 are incremental encoders.

The utility model discloses the theory of operation: when the crane hoisting mechanism normally operates, a driver manually controls a gear switch of the linkage table 1 to output a control signal to the programmable controller 4, meanwhile, a current encoder 7 and a torque encoder 8 which are arranged on the hoisting mechanism 2 output current and a torque signal to the programmable controller 4 through the communication card 6, the programmable controller 4 controls the operation of the frequency converter 5 according to the control signal output by the linkage table 1 and the current and the torque signal fed back by the communication card 6, and the frequency converter 5 controls the operation of the hoisting motor 3 so as to drive the hoisting mechanism 2 to operate. In the operation process of the hoisting mechanism 2, when a hoisted object or a hoisted object is accidentally hung on another object, the current signal and the torque signal output by the current encoder 7 and the torque encoder 8 can be suddenly and continuously increased, when the current signal and the torque signal exceed the allowable value set by the programmable controller 4, the programmable controller 4 immediately outputs a signal to control the frequency converter 5 to not control the operation of the hoisting motor 3 at the gear speed output by the linkage table 1 any more, but to force the hoisting motor 3 to stop operating immediately, so that the crane is prevented from tipping over or the steel beam is prevented from being pulled off due to the overload operation of the crane, the use safety of the crane is improved, and the safety of personnel and objects is ensured.

Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that changes, modifications, substitutions and alterations can be made in these embodiments without departing from the principles and spirit of the invention, the scope of which is defined in the appended claims and their equivalents.

Claims

1. The utility model provides a hoist device with overload self-discharging function, includes linkage platform (1), hoisting mechanism (2) and the lifting motor (3) of control hoisting mechanism (2) operation, its characterized in that: still include programmable controller (4), converter (5) and communication card (6), the input electric connection of linkage platform (1) and programmable controller (4), hoisting mechanism (2) are provided with current encoder (7) and torque encoder (8), current encoder (7) and torque encoder (8) and the input electric connection of communication card (6), the output of communication card (6) and the input electric connection of programmable controller (4), the output of programmable controller (4) and the input electric connection of converter (5), the output of converter (5) and the control end electric connection of hoisting motor (3).

2. The crane device with overload self-unloading function as claimed in claim 1, wherein: the communication card (6) is a PROFIBUS communication card adopting a PROFIBUS communication protocol.

3. The crane device with overload self-unloading function as claimed in claim 1, wherein: the current encoder (7) and the torque encoder (8) are incremental encoders.