阅读说明：本技术 一种变频行车松绳检测保护系统及控制方法 (Variable-frequency driving rope loosening detection protection system and control method ) 是由 许利民 潘锋 刘斌 于 2021-07-30 设计创作，主要内容包括：本发明涉及电气传动技术领域,尤其是指一种变频行车松绳检测保护系统及控制方法,包括行车人机操作屏、行车逻辑控制器、行车升降变频器和行车升降电机,其特征在于,所述行车人机操作屏与行车逻辑控制器电性连接,行车逻辑控制器与行车升降变频器电性连接,行车升降变频器与行车升降电机电性连接,行车逻辑控制器用于接收数值与进行运算,行车升降变频器用于输出当前行车的数值,行车升降电机用于升降运作,通过对行车人机操作屏输入松绳的力矩保护值,之后在在行车升降变频器中得到实时的松绳的力矩值,两个值在行车逻辑控制器中进行对比,若实时的力矩的绝对值小于保护值则停止运作,若大于则进行运行,从而实现行车钢丝绳的松绳检测和保护。(The invention relates to the technical field of electric transmission, in particular to a frequency conversion driving rope loosening detection protection system and a control method, which comprises a driving man-machine operation screen, a driving logic controller, a driving lifting frequency converter and a driving lifting motor, and is characterized in that the driving man-machine operation screen is electrically connected with the driving logic controller, the driving logic controller is electrically connected with the driving lifting frequency converter, the driving lifting frequency converter is electrically connected with the driving lifting motor, the driving logic controller is used for receiving numerical values and carrying out operation, the driving lifting frequency converter is used for outputting the numerical values of current driving, the driving lifting motor is used for lifting operation, the real-time rope loosening moment value is obtained in the driving lifting frequency converter by inputting the torque protection value of the rope loosening to the driving man-machine operation screen, the two values are compared in the driving logic controller, and the operation is stopped if the absolute value of the real-time moment is smaller than the protection value, and if the current value is larger than the preset value, the crane runs, so that the rope loosening detection and protection of the crane steel wire rope are realized.)

1. A frequency conversion driving rope loosening detection protection system comprises a driving man-machine operation screen, a driving logic controller, a driving lifting frequency converter and a driving lifting motor, and is characterized in that the driving man-machine operation screen is electrically connected with the driving logic controller, the driving logic controller is electrically connected with the driving lifting frequency converter, and the driving lifting frequency converter is electrically connected with the driving lifting motor;

the driving man-machine operation screen is used for inputting numerical values and displaying various numerical values, the driving logic controller is used for receiving the numerical values and carrying out operation, the driving lifting frequency converter is used for outputting the numerical values of the current driving, and the driving lifting motor is used for lifting operation.

2. The frequency conversion driving rope loosening detection and protection system according to claim 1, wherein the driving man-machine operation screen is used for setting a rope loosening torque protection value.

3. The system of claim 2, wherein the traffic logic controller is configured to receive the slack rope torque protection value and collect an absolute value of a real-time torque of the traffic lifting transducer.

4. The system of claim 3, wherein the traveling crane hoisting frequency converter is configured to output an absolute value of a real-time torque during traveling.

5. A control method for detecting and protecting looseness of a variable-frequency driving vehicle is characterized by being used for the detection and protection system for the looseness of the variable-frequency driving vehicle as claimed in any one of claims 1 to 4, and the method comprises the following steps:

step one, inputting a rope loosening torque protection value on an operation screen of a motor of a bicycle;

secondly, operating a traveling crane lifting motor, and calculating data when the traveling crane lifting frequency converter receives the traveling crane lifting motor;

thirdly, the driving lifting frequency converter transmits the absolute value of the calculated real-time moment to a driving logic controller;

and step four, comparing the rope loosening moment protection value with the absolute value of the real-time moment received by the driving logic controller, when the absolute value of the real-time moment is smaller than the rope loosening moment protection value, giving an early warning and controlling the driving lifting motor to stop, and when the absolute value of the real-time moment is larger than the rope loosening moment protection value, continuously controlling the driving lifting motor to operate.

Technical Field

The invention relates to the technical field of electric transmission, in particular to a variable-frequency travelling crane rope loosening detection protection system and a control method.

Background

If the travelling crane steel wire rope is not found in time when loosened, serious equipment accidents and personal injuries can be caused by continuously lifting and hoisting heavy objects, namely, the steel wire rope is separated from the groove and is stuck and damaged, or the steel wire rope is broken and falls suddenly after being stuck. At present, a weighing sensor is generally arranged on a travelling crane in a standard mode, the precision is not high (the basic error range is 100 kilograms), and the detection of loose ropes by using the weighing sensor is not reliable enough. The lifting driving frequency converter of the frequency conversion travelling crane has a moment detection function, is not used for detecting rope looseness of the travelling crane at present, and is improved for the purpose.

Disclosure of Invention

The invention aims to overcome the defects of the prior art and provide a technical scheme capable of solving the problems.

A frequency conversion driving rope loosening detection protection system comprises a driving man-machine operation screen, a driving logic controller, a driving lifting frequency converter and a driving lifting motor, wherein the driving man-machine operation screen is electrically connected with the driving logic controller; the driving man-machine operation screen is used for inputting numerical values and displaying various numerical values, the driving logic controller is used for receiving the numerical values and carrying out operation, the driving lifting frequency converter is used for outputting the numerical values of the current driving, and the driving lifting motor is used for lifting operation.

Preferably, the driving man-machine operation screen is used for setting a rope loosening moment protection value.

Preferably, the driving logic controller is used for receiving the rope loosening torque protection value and acquiring an absolute value of a real-time torque of the driving lifting frequency converter.

Preferably, the driving lifting frequency converter is used for outputting an absolute value of a real-time moment when the vehicle is driven.

A frequency conversion driving rope loosening detection protection control method comprises the following steps:

step one, inputting a rope loosening torque protection value on an operation screen of a motor of a bicycle;

secondly, operating a traveling crane lifting motor, and calculating data when the traveling crane lifting frequency converter receives the traveling crane lifting motor;

thirdly, the driving lifting frequency converter transmits the absolute value of the calculated real-time moment to a driving logic controller;

and step four, comparing the rope loosening moment protection value with the absolute value of the real-time moment received by the driving logic controller, when the absolute value of the real-time moment is smaller than the rope loosening moment protection value, giving an early warning and controlling the driving lifting motor to stop, and when the absolute value of the real-time moment is larger than the rope loosening moment protection value, continuously controlling the driving lifting motor to operate.

Compared with the prior art, the invention has the beneficial effects that: the moment protection value of rope loosening is input into the driving man-machine operation screen, then the real-time moment value of rope loosening is obtained in the driving lifting frequency converter, the two values are compared in the driving logic controller, if the real-time moment value is larger than the protection value, the operation is stopped, and if the real-time moment value is smaller than the protection value, the operation is carried out, so that the rope loosening detection and protection of the driving steel wire rope are realized.

Drawings

In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings used in the description of the embodiments or the prior art will be briefly described below, and it is obvious that the drawings in the following description are only some embodiments of the present invention, and for those skilled in the art, other drawings can be obtained according to these drawings without creative efforts.

Fig. 1 is a schematic structural diagram of an embodiment of the present invention.

Fig. 2 is a flow chart of a method of an embodiment of the present invention.

Detailed Description

The technical solutions in the embodiments of the present invention will be clearly and completely described below, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.

In this embodiment, please refer to fig. 1-2, a frequency conversion vehicle traveling rope loosening detection protection system specifically implemented by the system comprises a vehicle traveling man-machine operation screen, a vehicle traveling logic controller, a vehicle traveling lifting frequency converter and a vehicle traveling lifting motor, wherein the vehicle traveling man-machine operation screen is electrically connected with the vehicle traveling logic controller, the vehicle traveling logic controller is electrically connected with the vehicle traveling lifting frequency converter, and the vehicle traveling lifting frequency converter is electrically connected with the vehicle traveling lifting motor; the driving man-machine operation screen is used for inputting numerical values and displaying various numerical values, the driving logic controller is used for receiving the numerical values and carrying out operation, the driving lifting frequency converter is used for outputting the numerical values of the current driving, the driving lifting motor is used for lifting operation, the driving man-machine operation screen is used for setting a rope loosening moment protection value, the driving logic controller is used for receiving the rope loosening moment protection value and acquiring an absolute value of a real-time moment of the driving lifting frequency converter, the driving lifting frequency converter is used for outputting the absolute value of the real-time moment when driving, the moment protection value of the rope loosening is input into the driving man-machine operation screen, then the real-time moment value of the rope loosening is obtained in the driving lifting frequency converter, the two values are compared in the driving logic controller, if the real-time moment value is smaller than the protection value, the operation is stopped, and if the real-time moment value is larger than the protection value, the operation is carried out, so that the purposes of detection and protection are achieved.

A control method of a variable-frequency driving rope loosening detection protection system comprises the following steps:

step one, inputting a rope loosening torque protection value on an operation screen of a motor of a bicycle;

secondly, operating a traveling crane lifting motor, and calculating data when the traveling crane lifting frequency converter receives the traveling crane lifting motor;

thirdly, the driving lifting frequency converter transmits the absolute value of the calculated real-time moment to a driving logic controller;

and step four, comparing the rope loosening moment protection value with the absolute value of the real-time moment received by the driving logic controller, when the absolute value of the real-time moment is smaller than the rope loosening moment protection value, giving an early warning and controlling the driving lifting motor to stop, and when the absolute value of the real-time moment is larger than the rope loosening moment protection value, continuously controlling the driving lifting motor to operate.

It will be evident to those skilled in the art that the invention is not limited to the details of the foregoing illustrative embodiments, and that the present invention may be embodied in other specific forms without departing from the spirit or essential attributes thereof. The present embodiments are therefore to be considered in all respects as illustrative and not restrictive, the scope of the invention being indicated by the appended claims rather than by the foregoing description, and all changes which come within the meaning and range of equivalency of the claims are therefore intended to be embraced therein.