Moment limiter for mini engineering crane
A crane and limiter technology, applied in the direction of cranes, clockwork mechanisms, hoisting devices, etc., can solve the problems of complex use environment of engineering cranes, large size of torque limiters, hidden dangers in safety production, etc., and achieve simple structure and measurement accuracy. The effect of high, simplified structure
Inactive Publication Date: 2010-01-20
宜昌市创星电子技术发展有限公司
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Problems solved by technology
[0002] Small engineering cranes (such as 3-12 truck cranes, tire cranes, crawler cranes, etc.) are widely used in the field of construction engineering due to their small size, flexible maneuverability, and low price. However, such small engineering cranes do not have special torque limiters. Only the load indicator is installed. The main function of the load indicator is to display the weight of the objects hoisted by the crane for the operator's reference. It does not have safety protection functions such as overload automatic alarm, automatic protection and automatic control. The working environment of the engineering crane is abnormal. Complex, various unsafe factors exist everywhere, so there are serious hidden dangers in production safety; and the moment limiter for large and medium-sized construction cranes is large in size and high in cost, and it cannot be directly used in small construction cranes
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[0021] Such as figure 1 with figure 2 As shown, the present invention includes a power supply 1, a data acquisition unit 2, a data processing unit 3, a data display unit 4 and a control unit 5, wherein:
[0022] In the data acquisition unit 2, the hydraulic sensors, angle sensors and arm length sensors respectively installed in the corresponding parts of the small construction crane are connected to the input circuit;
[0023] In the data processing unit 3, the single-chip microcomputer is connected with the memory, the single-chip microcomputer is connected with the input circuit, and the data processing and control programs are stored in the memory;
[0024] In the data display unit 4, the display is connected with the single-chip microcomputer;
[0025] In the control unit 5, the control device is connected with the single-chip microcomputer through the output circuit, alarms according to the instructions of the single-chip microcomputer, and controls the oil circuit of the small c...
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The invention relates to a moment limiter for mini engineering cranes, comprising a power supply, a data acquisition unit, a data processing unit, a data display unit and a control unit; in the data acquisition unit, a hydraulic sensor, an angle sensor and an arm length sensor, which are arranged at corresponding positions of a small-sized engineering crane, are connected with an input circuit; in the data processing unit, a single chip computer is connected with a memory, and is also connected with the input circuit; in the data display unit, a display is connected with the single chip computer; in the control unit, a control device is connected with the single chip computer through an output circuit, so as to raise the alarm and control the oil path of the mini engineering crane according to instructions from the single chip computer; a signal wire of a lifting limiting switch of a lifting limiting system is connected with the control device through a coil box, and after the lifting limiting switch is turned off, the control device raises the alarm and carries out limiting control. The invention solves the problem of safety of the mini engineering crane, and has the advantages of simple structure, high precision and low cost.
Description
Technical field [0001] The invention relates to a safety protection device for cranes, in particular to a moment limiter for small construction cranes. Background technique [0002] Small construction cranes (such as 3-12 truck cranes, tire cranes, crawler cranes, etc.) are widely used in construction engineering due to their small size, flexibility, and low price. However, such small construction cranes do not have a dedicated torque limiter, and often Only the load indicator is installed. The main function of the load indicator is to display the weight of the objects lifted by the crane for the operator's reference. It does not have the safety protection functions such as overload automatic alarm, automatic protection and automatic control. The use environment of the construction crane is abnormal Complexity, various unsafe factors exist everywhere, so there are serious hidden dangers in production safety; and the large and medium-sized construction cranes have large volume and...
Claims
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Login to View More IPC IPC(8): B66C23/88B66C23/90B66D1/58
Inventor 陈家忠
Owner 宜昌市创星电子技术发展有限公司