CN2198251Y

CN2198251Y - Weighing controller of hoist

Info

Publication number: CN2198251Y
Application number: CN 94229089
Authority: CN
Inventors: 严晓光; 侯吉东; 许景妍
Original assignee: DANDONG ELECTRIC EQUIPMENT FACTORY
Current assignee: DANDONG ELECTRIC EQUIPMENT FACTORY
Priority date: 1994-07-07
Filing date: 1994-07-07
Publication date: 1995-05-24
Anticipated expiration: 2004-07-07

Abstract

The utility model discloses a weighing controller for a hoist, relating to the improvement of a load lifting limiter. The utility model comprises a weighing sensor, a connecting cable and a secondary meter, and a circuit comprises an alarm and control circuit, and a display circuit. The utility model is characterized in that the alarm and control circuit is composed of an overload control circuit for the crane and an overload control circuit for accumulated weight, and thedisplay circuit is composed of two sets of nixietubes. The utility model can prevent the overload or the underload of loaded objects, and has the advantages of easy operation, etc.

Description

Weighing controller of hoist

The utility model relates to the improvement of load lifting limiter.

At present domestic load lifting limiter can only show the hoisting capacity of hoisting crane and overload warning and control, does not add up and shows and the warning function that overflows and there is hoisting capacity, thereby can't limit the overload that is loaded thing.

The purpose of this utility model is exactly at the problems referred to above, provides a kind of and can prevent the overload crane operation, can prevent to be loaded the hoisting crane weighing controller of thing overload again.

The purpose of this utility model is to realize like this, the utility model comprises LOAD CELLS, tie cable and secondary instrument, circuit comprises that warning and control circuit, display circuit, warning and control circuit be made up of overload crane control circuit and the weight that adds up overload control circuit, display circuit is made up of two groups of charactrons, realizes above-mentioned purpose of the present utility model with this.

Major advantage of the present utility model:

1. can prevent to be loaded thing overload or underload:

Owing to the utlity model has the function that hoisting capacity adds up demonstration automatically, overflows and report to the police and control, thereby can not only prevent overload crane and can also prevent to be loaded thing (for example railway carriage) overload or underload, thereby avoid the safety hazard that produces because of overload or because of the underload wasting phenomenon that produces.

2. simple to operate:

Because the utility model hoisting capacity adds up and can carry out automatically, the keyboard relative set also has system gain function such as calibration automatically, therefore simple to operate, debug also easy;

3. can long preservation multiple original work data:

Because the utility model can be adopted nonvolatile memory, and be furnished with typewriter and clock circuit, just can and be loaded thing such as railroad car sequence number, long preservation, provide the condition that makes things convenient for to production control with multiple original data such as time, hoisting capacity and sequence number, the weight that adds up.

Fig. 1 is a structural representation of the present utility model;

Fig. 2 is a circuit block diagram of the present utility model;

Fig. 3 is schematic circuit diagram of the present utility model.

Below in conjunction with accompanying drawing concrete structure of the present utility model is described further:

See Fig. 1, the utility model keeps the structure of most of existing load lifting limiter: LOAD CELLS 1, tie cable 2, keyboard 3, operating mode demonstration 4, telltale 6, circuit card 7, secondary instrument 8, control and power interface 9, main is exactly to warning and control circuit, display circuit in circuit, work to be improving, and increased print apparatus.

See Fig. 2, the hoisting capacity signal is detected by LOAD CELLS and can become electric signal, delivers to the A/D change-over circuit and become digital signal, deliver to single chip microcomputer after analog signal processing circuit amplification, filtering.Single chip microcomputer carries out dynamic load according to keyboard state to the signal of receiving to be handled, with original hoisting capacity data mutually adduction send display circuit, demonstrate hoisting capacity and the weight that adds up; Relatively judge whether overload with setting value, if then providing control signal, overload starts corresponding the warning and control circuit, cut off the hoisting circuit of hoisting crane, hoisting capacity in the time of will overloading by corresponding function key is again removed from the weight that adds up, receive when single chip microcomputer to show or the instruction of time-write interval that the data that single chip microcomputer is about to clock circuit are sent and shown or be printed on the paper tape.When single chip microcomputer was received print command, soon the data print-out in the memory was on paper tape.

See Fig. 3, report to the police and the control road is made up of the overload crane control circuit and the overload control circuit that adds up, the overload crane control circuit be existing structure can have.Reporting to the police can be by sound device HA, oscillating circuit IC15(for example with control circuit, and model is 555), photoelectrical coupler IC16, IC17(for example model be 113), switch triode V ₁, V ₂, relay K ₁, K ₂, resistance R ₁-R ₆Form, wherein IC16, V ₁, K ₁, R ₁-R ₃Formed the overload crane control circuit; IC ₁₇, V ₂, K ₂, R ₄-R ₆Form the weight that the adds up control circuit that overflows.As micro controller system IC ₃When providing the overload crane signal, the IC16 input end has electric current to pass through, and the mouth conducting makes V ₁Base stage becomes high level, on the one hand V ₁Make K ₁Adhesive, normally closed contact disconnect, cut off the hoisting circuit of hoisting crane; IC15 work simultaneously and outputting oscillation signal make sound device HA send the interruption sound; As micro controller system IC ₃Providing adds up when overflowing signal, and the IC17 input end has electric current to pass through, and the mouth conducting makes V ₂Conducting, K ₂Adhesive is with V ₁Open contact K in parallel _2-1Closure makes K ₁Controllable function is finished in adhesive, simultaneously K ₂Another the group contact K ₂-2 are connected to power supply with sound device HA, make it send the continuous sound.

Display circuit is by charactron group XS ₁, charactron group XS ₂, driving circuit IC ₈And IC ₁₀(for example model is 1413), position select IC circuit 9(for example model be 74138) form, remove charactron group XS ₂All the other are all the display circuit structure of existing load lifting limiter outward, and the charactron group is used for XS ₁The hoisting capacity that is hoisting crane shows charactron group XS ₂Be that the weight that adds up that is used for hoisting crane shows.

Keyboard is made up of function key, setting key, numerical key, and setting key must cut object with hoisting crane operating mode (as main hook, auxiliary hook, grab bucket) with by dress, and for example, the railway carriage freight weight limit is corresponding; Hoisting capacity when function key must have the overload crane or the weight that adds up to overflow is handled key, when overflowing with the weight that adds up as " subtracting one " key, to the processing key of overload part, as " material reducing " key.The usage of the key that " subtracts " is the hoisting capacity when overload when being fallen by the original place, by " subtracting one " key this weight is removed from accumulated value, and the usage of " material reducing " key is when being loaded thing, and when overload as railway carriage, will overflow by this key partly hangs out.Function key also comprises after first Loaded goods has been adorned, to lift data print-out before second Loaded goods goes out and removes the add up warning that overflows and " transfer " key of state of a control, " time " key of time-write interval, " zeroing " of two group display equipment zero clearings and " clear tired " key, system gain self-regulating " calibration " key.

Clock circuit by calendar clock chip IC12(for example model be 5832) and corresponding crystal oscillator is adjusted key, rechargeable battery (voltage is 3.6V) is formed, by I/O interface IC11(for example model be 8255) be the single chip microcomputer communication.

Single chip microcomputer comprises: micro controller system IC ₃(for example model is 8031), memory under program IC5(for example model are 2764) and data memory IC6(for example model be 2864), I/O interface IC4(for example model be 74LS373), IC7(for example model be 8279), IC11 and IC13(for example model be 8255), this part is the core of secondary instrument 8.

Analog signal processing circuit by IC2(for example model be OP07) amplifying circuit and subsequent RC filter circuit form, it amplifies the weak signal of LOAD CELLS output and decay interfering signal wherein.

The A/D change-over circuit by IC2(for example model be 7109) and corresponding peripheral cell form, it receives analog signal conditioning, the voltage signal of circuit output also converts thereof into digital signal, by I/O interface IC11(for example model be 8255) with micro controller system IC3 communication.

Claims

1, the hoisting crane weighing controller comprises LOAD CELLS 1, tie cable 2, secondary instrument 8, circuit comprises warning and control circuit, display circuit, it is characterized in that reporting to the police and control circuit is made up of the overload crane control circuit and the weight overload control circuit that adds up, display circuit is made up of two groups of charactrons.

2, lifting weighing controller according to claim 1 is characterized in that by photoelectrical coupler IC ₁₆, switch triode V ₁, relay K ₁, resistance R ₁-R ₃Form lifting overload control circuit; By photoelectrical coupler IC ₁₇, switch triode V ₂, relay K ₂, resistance R ₄-R ₆Form the weight that the adds up control circuit that overflows.