CN203699687U

CN203699687U - Device for preventing rail gnawing and correcting synchronously for big wheeled crane

Info

Publication number: CN203699687U
Application number: CN201420039153.2U
Authority: CN
Inventors: 李强; 王福生
Original assignee: HENAN WORLD-MASTERY ELECTRICAL AUTOMATION Co Ltd
Current assignee: HENAN WORLD-MASTERY ELECTRICAL AUTOMATION Co Ltd
Priority date: 2014-01-22
Filing date: 2014-01-22
Publication date: 2014-07-09
Anticipated expiration: 2024-01-22

Abstract

The utility model discloses a device for preventing rail gnawing and correcting synchronously for a big wheeled crane. The device comprises a left guide rail and a right guide rail, and further comprises a PLC (Programmable Logic Controller), wherein sensors are respectively mounted on left and right end beams, and output signals to an A/D module; the output end of the A/D module is connected with the input end of the PLC; signals of another path are acquired by an encoder; the encoder is mounted on the axel of rubber wheels; the rubber wheels are clung to the left and right guide rails through connecting rods; the encoder outputs signals to a D/A module; the output end of the D/A module is connected with the input end of the PLC; the output end of the sensors outputs 4-20 mA continuous signals to the A/D module; the sensors are used for measuring the transverse distance between a wheel rim of the big wheeled crane and the corresponding guide rail, and the encoder is used for measuring the longitudinal displacement. According to the utility model, the sensors are used for measuring the transverse displacement, the encoder is used for measuring the longitudinal displacement, the acquired signals are output to the PLC, and calculating is conducted; thus, the problem of errors which are caused by rail gnawing, overlarge offsets on the two sides of the crane and other factors is solved.

Description

The synchronous preventing gnawing rail deviation correcting device of crane

Technical field:

The utility model relates to the synchronous preventing gnawing rail deviation correcting device of a kind of crane, is specially adapted to use on wide span bridge type, transfer crane.

Background technology:

Existing hoisting crane deviation correcting device, mostly adopt coder, get the speed signal on crane travelling gear both sides, and rectify a deviation after not processing in PLC, but the method is open loop control, to such as skidding, what installation question formed gnaw rail, deflection cannot be corrected, the name that Zai You State Patent Office is authorized is called: a kind of hoisting crane automatic deviation rectifying device, and the patent No. 201220200324.6, comprises industrial computer, two automatic wheels and is located at respectively two coders on two automatic wheels; On walking beam, relevant position is provided with approach switch in pairs, and its shortcoming is: need many places to establish and adjust a little, and in blind area, cannot detect side-play amount between adjusting a little, can not prevent that big wheel wheel is along the generation of gnawing rail phenomenon.

Summary of the invention:

Task of the present utility model is to propose a kind of dual-circuit signals collection, thereby solves the synchronous preventing gnawing rail deviation correcting device of a kind of crane of gnawing rail and the generation of deflection problem.

Task of the present utility model completes like this, the synchronous preventing gnawing rail deviation correcting device of crane, it comprises left and right side guide rail, it is characterized in that: it comprises on PLC, left and right end carriage and is separately installed with sensor, sensor output signal is to A/D module, be connected with PLC input end by A/D module mouth, another road signal gathers by coder, described coder is arranged on the axle of rubber wheel, rubber wheel is close to by connecting rod and left and right side guide rail, described encoder output, to D/A module, is connected with PLC input end by D/A module mouth.Described sensor output signal with 4-20mA continuously by mouth to A/D module.Described sensor is to detect cart wheel along the transverse distance apart to guide rail, and described coder is to detect longitudinal travel amount.

The utlity model has following effect: detect cross travel and longitudinal travel by sensor and coder, the signal collecting is flowed to PLC, calculate, gnawing rail, hoisting crane both sides side-play amount is excessive, the problems such as the error being caused by other reason solve simultaneously.

Brief description of the drawings:

Fig. 1 is the mounting structure schematic diagram of sensor; Fig. 2 is the scheme of installation of Figure 1A to coder; Fig. 3 is embodiment controlling party block diagram; Fig. 4 is cross travel control path block scheme.

Drawing explanation: 1, right side big wheel, 2, right sensor, 3, right rail, 4, left rail, 5, left sensor, 6, left side big wheel, 7, end carriage, 8, rubber wheel, 9, coder, 10, connecting rod.

Detailed description of the invention:

The technical solution of the utility model is to adopt two-way acquisition of signal, this two paths of signals device is arranged on cart operation both sides, the signal detecting is carried to programmable controller, (be called for short PLC) draws cross travel amount and longitudinal travel residual quantity by PLC computing, and rectifies a deviation in time and drive the normal operation of hoisting crane.

Specific embodiment is as follows: detecting cross travel amount is to adopt sensor, as shown in Figure 1, what left and right side track 4 and 3 was above walked above is left and right side big wheel 6 and 1, monitoring cart wheel is along being to detect by sensor apart from the distance of guide rail, left and right sensor 5 and 2 respectively corresponding end carriage 7 is installed, feed back to A/D module with the continuous signal of 4-20mA, by A/D module, sensor output signal is carried out after hardware handles converts digital quantity signal to exporting to PLC, calculate depanning to displacement by PLC, control in time and rectify a deviation.

Another road longitudinal signal collection is by coder 9, detailed description of the invention is: when the walking of left and right cart wheel, on the connecting rod 10 being connected with left and right sides, rubber wheel 8 is installed and is close to a left side, right guide rail is walked simultaneously, coder is contained on the axle of rubber wheel, displacement by guide rail and cart when left and right cart wheel group is walked drives rubber wheel passive walking, measure the longitudinal travel signal of crane, after signal output, feed back to D/A module, digital signal is converted to analog signal output to PLC, calculate both sides longitudinal travel residual quantity by PLC, control in time the generation of gnawing rail phenomenon.

Fig. 3 and Fig. 4 are the circuit block-diagrams of embodiment: the transverse distance being collected by sensor and coder and the signal of fore-and-aft distance, inputed to the input end of PLC by mouth, the mouth of PLC is exported to respectively left side driving and right side drives, control hoisting crane both sides side-play amount excessive, drive the normal walking of hoisting crane.

Can be for using on wide span bridge type and transfer crane shown in Fig. 3 and Fig. 4, received the operation signal of autonomous controller by PLC and module thereof, the position signal that coder PG and sensor transmit through detecting element, displacement signal and other information are sent action command to frequency converter INV through inner length of run, motor M, the power elements such as contactless switch, drive hoisting crane normal operation, D/A module receives the operating value from PLC, digital quantity is converted to the receivable analog signals of power element, make velocity amplitude adjustable, reach the object of dynamic adjustment, A/D module receives the analog signals from free displacement quantity sensor, convert the discernible digital quantity signal of PLC to as dynamic adjustment foundation, PLC and D/A module, A/D module receives signal by input end, output signal, it is the control center of whole system, frequency converter INA receives the instruction from PLC system, drive motor M carries out corresponding actions, and linear output speed value reaches dynamic adjustment requirement within the specific limits, coder is the longitudinal travel amount for detecting hoisting crane, counting machine receives the pulsed quantity signal from coder, convert digital value to and pass to PLC by mouth, sensor detects the cross travel amount of hoisting crane, measure vehicle wheel along flowing to the accurate distance of track the basis that PLC is cross travel amount, motor is execution unit, accepting frequency converter INA drives, driving mechanical parts, drive the normal walking of hoisting crane.

By the collection of above two-way signal data, can detect cross travel, can detect longitudinal travel again, the displacement that makes hoisting crane both sides traveling gear all the time in allowed band, thereby solve rail and the deflection problem of gnawing.

Claims

1. the synchronous preventing gnawing rail deviation correcting device of crane, it comprises left and right side guide rail, it is characterized in that: it comprises on PLC, left and right end carriage and is separately installed with sensor, sensor output signal is to A/D module, be connected with PLC input end by A/D module mouth, another road signal gathers by coder, described coder is arranged on the axle of rubber wheel, rubber wheel is close to by connecting rod and left and right side guide rail, described encoder output, to D/A module, is connected with PLC input end by D/A module mouth.

2. the synchronous preventing gnawing rail deviation correcting device of crane according to claim 1, is characterized in that: described sensor output signal with 4-20mA continuously by mouth to A/D module.

3. the synchronous preventing gnawing rail deviation correcting device of crane according to claim 1, is characterized in that: described sensor is to detect cart wheel along the transverse distance apart to guide rail, and described coder is to detect longitudinal travel amount.