CN101628694A

CN101628694A - Novel moment limiter for crane

Info

Publication number: CN101628694A
Application number: CN200910063460A
Authority: CN
Inventors: 陈家忠; 王进; 潘兵
Original assignee: YICHANG CITY CHUANGXING ELECTRONIC TECHNOLOGY DEVELOPMENT Co Ltd
Current assignee: YICHANG CITY CHUANGXING ELECTRONIC TECHNOLOGY DEVELOPMENT Co Ltd
Priority date: 2009-08-06
Filing date: 2009-08-06
Publication date: 2010-01-20

Abstract

The invention provides a novel moment limiter for cranes, comprising a power module, a data acquisition module, a data processing module, a data display module, a control module and a remote monitoring maintenance module; in the data acquisition module, a hydraulic sensor, an angle sensor and an arm length sensor, which are respectively arranged at corresponding positions of a crane, are connected with an input circuit, and the hydraulic sensor and the arm length sensor can be manually adjusted so as to achieve zero-position self-adjustment; in the data processing module, a single chip computer is connected with a memory and the input circuit; in the data display module, a display is connected with the single chip computer; in the control module, a controller is connected with the single chip computer through an output circuit, and an alarm is connected with the single chip computer through the output circuit; in the remote monitoring maintenance module, a GPS/GPRS module is connected with the single chip computer through a CAN communication circuit. The novel moment limiter for cranes ensures the accuracy and normal operation of a safety protection system, and has the advantages of simple structure, convenient operation and strong popularization.

Description

A kind of novel moment limiter for crane

Technical field

The present invention relates to a kind of hoisting crane safety guard, particularly a kind of novel moment limiter for crane.

Background technology

Needs for safety in production, limiter of moment with safety protection function all is installed when hoisting crane dispatches from the factory at present, existing limiter of moment has following shortcoming: the one, because the environment for use of car hosit is abominable unusually, the brachium sensor line of limiter of moment is often hung up makes the limiter of moment can't normal operation, must send the professional and technical personnel to carry out site disposal or send it to producer and repair by producer, cause the operation of hoisting crane in this time to be in unprotect state, affects safety production; The 2nd, hydraulic pressure transducer is contained on the rod chamber and rodless cavity of amplitude oil cylinder, because it is very complicated that the hydraulic efficiency pressure system internal pressure changes, be subjected to the influence of internal system pressure, zero drift usually can take place in hydraulic pressure transducer, error increases, cause limiter of moment to produce false alarm and misoperation, the influence safety in production; The 3rd, do not have the remote monitoring maintenance function, if hoisting crane is worked outside, the then different monitor staff of place can't accurately grasp information such as the orientation of hoisting crane and real-time status, when hoisting crane overload or seriously violating the regulations and operating personal occur and do not take measures, can't control.

Summary of the invention

Technical matters to be solved by this invention provides a kind of novel moment limiter for crane; it has remote monitor and control and remote maintenance functions; but hand adjustment realizes that the zero-bit of brachium sensor and hydraulic pressure transducer is from adjusting; guaranteed the accuracy rate and the normal operation of safety system, safety is good, simple in structure, easy to operate.

In order to solve the problems of the technologies described above, technical scheme of the present invention is: a kind of novel moment limiter for crane, comprise power module, data acquisition module, data processing module, data disaply moudle, control module and remote monitoring maintenance module, wherein:

In the data acquisition module, the hydraulic pressure transducer, angular transducer and the brachium sensor that are installed in the hoisting crane corresponding site respectively are connected input circuit, but hydraulic pressure transducer and brachium sensor hand adjustment realize that zero-bit is from adjusting;

In the data processing module, micro controller system is connected with memory device, and micro controller system is connected with input circuit;

In the control module, controller is connected with micro controller system by output circuit, and annunciator is connected with micro controller system by output circuit;

In the remote monitoring maintenance module, the GPS/GPRS module is connected with micro controller system by the CAN communication circuit;

In the data disaply moudle, telltale is connected with micro controller system by the CAN communication circuit.

The reel of brachium sensor is an external.

In the controller, the electromagnetic valve that hoists is connected with micro controller system by driving circuit and control chip, and the amplification electromagnetic valve is connected with micro controller system by driving circuit and control chip.

Advantage of the present invention is as follows:

1, high safety, survey precision height, when hydraulic pressure transducer generation zero drift, but hand adjustment is realized adjusting certainly of zero-bit, when being connected again after the detection line of brachium sensor is hung up, but hand adjustment is realized the zero-bit of brachium sensor and from adjusting, has been guaranteed the safe operation of hoisting crane;

2, multiple functional, can carry out remote monitoring maintenance, the design of GPS/GPRS module and CAN communication circuit has realized gps satellite location, GPRS communication and upper computer server monitoring management function, the remote monitoring personnel can carry out Real-time Monitor Management to the state of hoisting crane, has played the effect of duplicate protection;

3, adopt the brachium sensor of external spool, if detection line is hung up, the operator need not dismantle the spool shell in the working process, just can connect detecting cable, and is easy to maintenance;

4, simple in structure, easy to operate, safety is good, be suitable for promoting, and is particularly useful for big-and-middle-sized hoisting cranes such as car hosit.

Description of drawings

The invention will be further described below in conjunction with drawings and Examples.

Fig. 1 is schematic circuit diagram of the present invention;

Fig. 2 is a circuit structure diagram of the present invention;

Fig. 3 is that hand adjustment of the present invention realizes that the zero-bit of brachium sensor is from the workflow diagram of adjusting;

Fig. 4 is that hand adjustment of the present invention realizes that the zero-bit of hydraulic pressure transducer is from the workflow diagram of adjusting;

Fig. 5 is the schematic diagram of remote control module of the present invention;

Fig. 6 is the workflow diagram of GPS/GPRS module of the present invention.

The specific embodiment

As depicted in figs. 1 and 2, the present invention includes power module 1, it also comprises data acquisition module 2, data processing module 3, data disaply moudle 4, control module 5 and remote monitoring maintenance module 6, wherein:

In the data acquisition module 2, the hydraulic pressure transducer, angular transducer and the brachium sensor that are installed in the hoisting crane corresponding site respectively are connected input circuit, but hydraulic pressure transducer and brachium sensor hand adjustment realize that zero-bit is from adjusting;

In the data processing module 3, micro controller system is connected with memory device, and micro controller system is connected with input circuit, stores data handing and control program in the memory device;

In the control module 5, controller is connected with micro controller system by output circuit, and annunciator is connected with micro controller system by output circuit;

In the remote monitoring maintenance module 6, the GPS/GPRS module is connected with micro controller system by the CAN communication circuit;

In the data disaply moudle 4, telltale is connected with micro controller system by the CAN communication circuit.

The reel of brachium sensor is an external.

Principle of work of the present invention is as follows:

Hydraulic pressure transducer, angular transducer and the brachium sensor acquisition that is installed in the hoisting crane corresponding site respectively to the machine performance parameter constantly be sent to micro controller system through input circuit, micro controller system is under the control of memory device internal program, according to detected machine performance parameter in machine performance parameter of setting before the work and the work, retrieve the load of the maximum that allows under the mechanical current state that is pre-stored in the memory, as standard, with detected actual load and its relatively, thus the mode of operation of judging machinery safety whether.

If hoisting crane operation in safe range, the green light that micro controller system can be controlled in the controller is lighted; If machine performance parameter actual value reach with current state under the maximum load that allows differed 10% o'clock, micro controller system can be controlled alarm equipment alarm; When if this actual value reaches the maxim of permission, micro controller system can be controlled in the controller amber light and light, simultaneously, micro controller system can be controlled hoist electromagnetic valve and/or the action of amplification electromagnetic valve in the controller, oil circuit to hoisting crane is controlled, and at this moment, the hoisting crane action that increases moment side (increasing the hoisting crane hazardous side) is all stopped automatically, can only reduce the action of moment side (increasing the crane safety side), thereby can make crane job be returned to safe condition; If during the maxim that this actual value surpass to allow, micro controller system can be controlled in the controller red light and light, and simultaneously, micro controller system can be controlled hoist electromagnetic valve and/or the action of amplification electromagnetic valve in the controller, and the oil circuit of hoisting crane is controlled, and the result is the same in control.

If the detection line of the brachium sensor of hoisting crane is hung up, after the operator connects detection line, press the brachium zero correction key in the present invention, the zero-bit that is stored in the memory device is carried out zero-bit from adjusting from the setting procedure control single chip computer to the brachium sensor, with the brachium value adjust the same with factory-said value precisely, concrete workflow is as shown in Figure 3.

The mounting means of the hydraulic pressure transducer that the present invention is used and detection principle are with like product is the same in the market, be installed on the rod chamber and rodless cavity of amplitude oil cylinder, when hydraulic pressure transducer generation zero drift, press the hydraulic pressure transducer zero correction key in the present invention, the zero-bit that is stored in the memory device is carried out zero-bit from adjusting from the setting procedure control single chip computer to hydraulic pressure transducer, reduce error, guarantee the accurate pressure measurement of system, concrete workflow as shown in Figure 4.

As shown in Figure 5 and Figure 6, the design of GPS/GPRS module of the present invention and CAN communication circuit has realized gps satellite location, GPRS communication and upper computer server monitoring management function; When GPS/GPRS module normal operation, green light in the Single-chip Controlling controller is lighted, the GPS module can be passed to the upper computer server with the satellite positioning information of hoisting crane in real time, make the monitor staff grasp the hoisting crane orientation at any time, the GPRS module can be in real time passed to the upper computer server with the state of hoisting crane and control information etc., when situation is operated against regulations in hoisting crane generation overload etc., monitor staff's information that can receive the report for police service in real time, when situation is operated against regulations in serious overload of hoisting crane generation etc., the monitor staff can play the effect of duplicate protection by the GPRS module to micro controller system issue an order direct control hoisting crane; When the present invention was broken down, the monitor staff also can carry out remote maintenance to the micro controller system issue an order by the GPRS module.

Angular transducer also can carry out zero-bit from adjusting by pressing angular transducer zero correction key in the present invention, thereby guarantees to guarantee accurately measuring and normal operation of system.

Claims

1, a kind of novel moment limiter for crane comprises power module (1), it is characterized in that: it also comprises data acquisition module (2), data processing module (3), data disaply moudle (4), control module (5) and remote monitoring maintenance module (6),

In the data acquisition module (2), the hydraulic pressure transducer, angular transducer and the brachium sensor that are installed in the hoisting crane corresponding site respectively are connected input circuit, but hydraulic pressure transducer and brachium sensor hand adjustment realize that zero-bit is from adjusting;

In the data processing module (3), micro controller system is connected with memory device, and micro controller system is connected with input circuit;

In the control module (5), controller is connected with micro controller system by output circuit, and annunciator is connected with micro controller system by output circuit;

In the remote monitoring maintenance module (6), the GPS/GPRS module is connected with micro controller system by the CAN communication circuit;

In the data disaply moudle (4), telltale is connected with micro controller system by the CAN communication circuit.

2, a kind of novel moment limiter for crane according to claim 1 is characterized in that: the reel of brachium sensor is an external.

3, a kind of novel moment limiter for crane according to claim 1, it is characterized in that: in the controller, the electromagnetic valve that hoists is connected with micro controller system by driving circuit and control chip, and the amplification electromagnetic valve is connected with micro controller system by driving circuit and control chip.