CN101190768A - Crane gliding-proof hook control device - Google Patents

Crane gliding-proof hook control device Download PDF

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Publication number
CN101190768A
CN101190768A CNA2006100981370A CN200610098137A CN101190768A CN 101190768 A CN101190768 A CN 101190768A CN A2006100981370 A CNA2006100981370 A CN A2006100981370A CN 200610098137 A CN200610098137 A CN 200610098137A CN 101190768 A CN101190768 A CN 101190768A
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CN
China
Prior art keywords
rotating speed
programmable controller
signal
tach signal
controller
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Pending
Application number
CNA2006100981370A
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Chinese (zh)
Inventor
蔡秀山
李锦云
Original Assignee
蔡秀山
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by 蔡秀山 filed Critical 蔡秀山
Priority to CNA2006100981370A priority Critical patent/CN101190768A/en
Publication of CN101190768A publication Critical patent/CN101190768A/en
Pending legal-status Critical Current

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Abstract

A crane anti-slipping control device which can prevent a heavy project from descending when the motor starting moment becomes small due to electricity or overweight. The invention is connected with the controller of the crane, and a rotating speed collecting device, an executive circuit, a programmable controller, a main order controller with signal interface are arranged on the crane. The CPU inside the programmable controller is stored with the signal of the move direction of the motor collected by the rotating speed signal collecting device, the program comparing rotating speed signal with the initial setting parameter, the program converting the rotating speed signal into travel signal and the comparative program. The invention collects the rotating speed data through a signal collector arranged on the transmission part and inputs the data into the programmable controller to compare with the data set in the controller. The system works normally when the rotating speed data matches the comparing condition; when the rotating speed data exceeds the set data, the order of the programmable controller executes the motion of the electro circuit so as to protect the whole machine.

Description

Crane gliding-proof hook control device
Technical field
The present invention relates to the control setup of the stall safety guard-safeguard of hoisting crane, relate in particular to a kind of electric motor starting moment that can prevent and diminish because of electric or overweight reason, and the crane gliding-proof hook control device that weight is descended when lifting.
Background technology
At present, hoisting crane opens when hanging or weight descends in hoisting process slide hook phenomenon because of staring torque occurs in because of electric or overweight reason diminishes in the course of the work sometimes.Can damage lifting thing and equipment, also personal injury accident may take place.The disclosed application number of State Intellectual Property Office is 03227441.6; name is called in the patent application of " hoisting crane stall protection device "; introduced a kind of technical scheme that protector is controlled stall that on the hoisting crane transmission shaft, is provided with; in this technical scheme; the designer increases a brake wheel at the other end of retarder; an one cover sure brake and a cover speed measuring device are installed on brake wheel; when speed measuring device degree of testing the speed during greater than the high operation speed of electrical motor; promptly cut off the crane hoisting mechanism power supply; the sure brake braking; thereby avoid lifting mechanism stall, prevent that suspension hook from falling.This drg generally is to adopt friction braking, and when lifting thing weight was big, its braking effect was poor, the hook phenomenon still can occur slipping.And in the long-term work,, accidental situation of slipping hook happens occasionally because appearring in the drg mechanical breakdown.
The control part of a lot of these type of devices is fairly simple, and when being difficult to pick out hoisting crane suspention startup, normal again situation about rising was protected the trace downslide after the suspension hook trace glided as stall condition.Most of motors are when starting because all there is such phenomenon in the factor of staring torque, if at the appointed time with stroke in, suspension hook recovers to rise, this is a kind of normal condition fully.
Summary of the invention
The present invention is directed to above technical matters, provide a kind of and can correctly distinguish the normal crane gliding-proof hook control device that glides with stalled glide of suspension hook when starting.
Technical scheme of the present invention is: it is connected on the crane controller, is provided with the rotating speed harvester on hoisting crane, and it also is provided with executive circuit, programmable controller, has the master controller of signaling interface; Programmable controller links to each other with executive circuit, and executive circuit connects the drg step switch on three-phase power switch, direct current input switch, rotor short-circuit switch and the transmission shaft of motor respectively; The master controller that has signaling interface connects programmable controller, described tach signal harvester is connected on the programmable controller, also be connected with telltale on the programmable controller, store the motor rotation direction signal by the collection of tach signal harvester, the program that tach signal is compared with the initial setting parameter and program and the comparison program that tach signal is converted to stroke signal on the CPU in the programmable controller; Select to carry out following steps in the master controller behind the input parameter:
1), master controller instruction hoisting crane descends;
When a, decline, the tach signal harvester sends tach signal to programmable controller, surpasses when setting rotating speed programmable controller instruction execution circuit execute protection;
When b, decline, rotating speed keeps down maneuver in setting rotating speed;
2), master controller instruction hoisting crane rises, the tach signal harvester sends tach signal to programmable controller;
A, rotating speed be on the occasion of the time, when promptly suspension hook is in propradation, keep vertical motion;
B, when rotating speed is negative value, promptly suspension hook is in the decline state; In the time of setting, tachometer value by negative value change on the occasion of the time, keep vertical motion; In the time of setting, when rotating speed still is negative value, programmable controller instruction execution circuit execute protection.
C, when rotating speed is negative value, promptly suspension hook is in the decline state; Program is converted to the range signal that suspension hook descends with tach signal, in the permission dropping distance of setting, tachometer value by negative value change on the occasion of the time, keep vertical motion; The distance that descends when suspension hook surpasses the permission dropping distance of setting, when rotating speed still is negative value, and programmable controller instruction execution circuit execute protection.
The signal picker of the present invention by being provided with on drive disk assembly gathered rotary speed data, and this data transmission is gone into programmable controller, compare with setting data in the controller, and when meeting comparison condition, system's normal operation; When exceeding setting data, the action of programmable controller instruction execution circuit is protected complete machine.According to The staring torque of motor has been stored the comparison program that can discern between normal trace counter-rotating and stall counter-rotating in programmable controller of the present invention, can identify the counter-rotating of normal counter-rotating and stall exactly.Design concept of the present invention is reasonable, and the lifting function is played a very good protection.
Description of drawings
Fig. 1 is a conspectus of the present invention
Rotary encoder among the figure is arranged on the transmission shaft of hoisting crane; Executive circuit among the figure connects three-phase power switch, rotor short-circuit switch, the direct current input switch of crane motor, the drg step switch of hoisting crane respectively.
Fig. 2 is a control flow chart of the present invention
The specific embodiment
As Fig. 1, on the basis of hoisting crane control housing, set up executive circuit, programmable controller, had the master controller of signaling interface; Programmable controller links to each other with executive circuit, and executive circuit wherein connects the drg step switch on three-phase power switch, rotor short-circuit switch, direct current input switch and the transmission shaft of motor respectively; Programmable controller links to each other with the master controller on-off signal, the tach signal harvester that is arranged on the hoisting crane transmission shaft is connected on the programmable controller, also be connected with telltale on the programmable controller, store the time by the collection of tach signal harvester, the program that tach signal is compared with the initial setting parameter on the CPU in the programmable controller; Controller is provided with parameter input device.
As Fig. 2, store the motor rotation direction signal by the collection of tach signal harvester, the program that tach signal is compared with the initial setting parameter and program and the comparison program that tach signal is converted to stroke signal on the CPU in the programmable controller; Select to carry out following steps in the master controller behind the input parameter:
1), master controller instruction hoisting crane descends;
When a, decline, the tach signal harvester sends tach signal to programmable controller, surpasses when setting rotating speed programmable controller instruction execution circuit execute protection;
When b, decline, rotating speed keeps down maneuver in setting rotating speed;
2), master controller instruction hoisting crane rises, the tach signal harvester sends tach signal to programmable controller;
A, rotating speed be on the occasion of the time, when promptly suspension hook is in propradation, keep vertical motion;
B, when rotating speed is negative value, promptly suspension hook is in the decline state; In the time of setting, tachometer value by negative value change on the occasion of the time, keep vertical motion; In the time of setting, when rotating speed still is negative value, programmable controller instruction execution circuit execute protection.
C, when rotating speed is negative value, promptly suspension hook is in the decline state; Program is converted to the range signal that suspension hook descends with tach signal, in the permission dropping distance of setting, tachometer value by negative value change on the occasion of the time, keep vertical motion; The distance that descends when suspension hook surpasses the permission dropping distance of setting, when rotating speed still is negative value, and programmable controller instruction execution circuit execute protection.

Claims (1)

1. crane gliding-proof hook control device, it is connected on the crane controller, is provided with the rotating speed harvester on hoisting crane, it is characterized in that, and it also is provided with executive circuit, programmable controller, has the master controller of signaling interface; Programmable controller links to each other with executive circuit, and executive circuit connects the drg step switch on three-phase power switch, direct current input switch, rotor short-circuit switch and the transmission shaft of motor respectively; The master controller that has signaling interface connects programmable controller, described tach signal harvester is connected on the programmable controller, also be connected with telltale on the programmable controller, store the motor rotation direction signal by the collection of tach signal harvester, the program that tach signal is compared with the initial setting parameter and program and the comparison program that tach signal is converted to stroke signal on the CPU in the programmable controller; Select to carry out following steps in the master controller behind the input parameter:
1), master controller instruction hoisting crane descends;
When a, decline, the tach signal harvester sends tach signal to programmable controller, surpasses when setting rotating speed programmable controller instruction execution circuit execute protection;
When b, decline, rotating speed keeps down maneuver in setting rotating speed;
2), master controller instruction hoisting crane rises, the tach signal harvester sends tach signal to programmable controller;
A, rotating speed be on the occasion of the time, when promptly suspension hook is in propradation, keep vertical motion;
B, when rotating speed is negative value, promptly suspension hook is in the decline state; In the time of setting, tachometer value by negative value change on the occasion of the time, keep vertical motion; In the time of setting, when rotating speed still is negative value, programmable controller instruction execution circuit execute protection.
C, when rotating speed is negative value, promptly suspension hook is in the decline state; Program is converted to the range signal that suspension hook descends with tach signal, in the permission dropping distance of setting, tachometer value by negative value change on the occasion of the time, keep vertical motion; The distance that descends when suspension hook surpasses the permission dropping distance of setting, when rotating speed still is negative value, and programmable controller instruction execution circuit execute protection.
CNA2006100981370A 2006-11-30 2006-11-30 Crane gliding-proof hook control device Pending CN101190768A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
CNA2006100981370A CN101190768A (en) 2006-11-30 2006-11-30 Crane gliding-proof hook control device

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
CNA2006100981370A CN101190768A (en) 2006-11-30 2006-11-30 Crane gliding-proof hook control device

Publications (1)

Publication Number Publication Date
CN101190768A true CN101190768A (en) 2008-06-04

Family

ID=39485993

Family Applications (1)

Application Number Title Priority Date Filing Date
CNA2006100981370A Pending CN101190768A (en) 2006-11-30 2006-11-30 Crane gliding-proof hook control device

Country Status (1)

Country Link
CN (1) CN101190768A (en)

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN102320532A (en) * 2011-06-22 2012-01-18 常熟开关制造有限公司(原常熟开关厂) Control method for preventing hook from slipping when electric hoist stops
CN103935921A (en) * 2014-04-28 2014-07-23 新兴铸管股份有限公司 Safety protection device of wire rope reel of bridge crane
CN105217474A (en) * 2015-10-26 2016-01-06 武汉钢铁(集团)公司 A kind of crane in bridge type that prevents slips the intelligent monitor system of hook and method

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN102320532A (en) * 2011-06-22 2012-01-18 常熟开关制造有限公司(原常熟开关厂) Control method for preventing hook from slipping when electric hoist stops
CN103935921A (en) * 2014-04-28 2014-07-23 新兴铸管股份有限公司 Safety protection device of wire rope reel of bridge crane
CN105217474A (en) * 2015-10-26 2016-01-06 武汉钢铁(集团)公司 A kind of crane in bridge type that prevents slips the intelligent monitor system of hook and method

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