CN1024518C - Automatic weighing-packaging machine for granular or powdery materials - Google Patents

Abstract

The present invention relates to an automatic weighing and packing machine for granular materials and powdery materials. A light sensor is used for replacing a microswitch on the basis of original hardware logical control, an alternating-current control module is used for replacing a relay, the contactless control modules are inserted in an interface box connected with a microcomputer, and software is used for controlling the whole operation process. The present invention can correct procedures at any time according to the variation of the conditions of a production process and has the advantages of convenience and flexibility. A device and an apparatus which are used have the advantages of no mechanical contact, long service life and high universality and are the development direction of electromechanical integration. The present invention is suitable for the technical reformation of packing departments of industries of chemical industry, building materials, food, etc.

Description

Automatic weighing-packaging machine for granular or powdery materials

The present invention relates to the improvement of a kind of particle or granular material automatic weighing packing device.

At present the packing shop of industry particle such as chemical industry, building materials, grain or granular material product has been realized automatic weighing, packing mostly.The conventional electrical control setup that this employing realizes with micro-switch, time relay and hardware logic control circuit, controlling automatic balance slightly feed intake, carefully feed intake, cushion supporting, folder bag, each operation such as pocket.Because micro-switch, relay all are mechanical contact switches, the life-span of its contact is generally about 100,000 times, and a wrapping machine darg on average will be weighed about 20,000 times, in frequent operating process, these have have more than is needed one or two week of low-voltage electrical apparatus of contact to change, and it is extremely short that it keeps the cycle.In addition, the hardware logic control circuit complex structure, the probability failure height also only possesses the low order function of accurate metering under given conditions, must readjust circuit or device in case mode of operation changes, otherwise metering error is too big.Yet production process always often changes, the flowrate variation of material, and the wearing and tearing of low-voltage electrical apparatus contact point and distortion all can influence the measuring accuracy of device.For the accuracy of normally carrying out and measuring that guarantees to produce, the plant maintenance personnel just must keep in repair in constant adjustment, and labour intensity is big.At present, domestic fertilizer plant is this situation mostly just.

The objective of the invention is to design a kind of particle or granular material automatic weighing and packing machine with electromechanical integration control.This device is because of counter control, and as long as people just can constantly adjust, improve the operation operation of machine by software technology, thereby realizes the scientific management of packing shop.

Realization of the present invention is limited to the retrofit work amount of existing installation.Comprise material logical sequence, the Weighing mechanism of forming by bucket, weighing lever and counterweight, pack device, with electromagnetic valve, cylinder control action slightly establish bin gate, carefully ease up the rush to summit mechanics of equipment such as bar and belt conveyor of feeding door, Dump gate, sackholder all keeps original state and does not change, but in electrical control gear, replace position limited inching switch with photosensor monitoring weighing lever position, replace relay with ac control module; After abolishing original hardware controller, only need to install an interface case at the scene, and above-mentioned these contact pointless control modules are installed in the interface case that the standard industry controller is housed, the output importation of interface case and conventional equipment and computing machine and Control Network thereof are connected, and have just finished hardware technology transformation task of the present invention.

Since the photosensor that the present invention adopts no mechanical contact with exchange adaptation module, device prolongs service life greatly, and is active in one's movements, reliably.These devices all are the series of products that typing is produced, generally do not need special maintenance after installing, insertion is equipped with the standard industry controller (as the PB16H+B1 of U.S. OPTO22, PB16H+B2) in the interface case, thereby in the interface case, the information translation from the automatic balance position-sensing unit is become the criterion calculation machine information, and will control the exercises of automatic balance from the operating order of computing machine.Original automation mechanized operation of being finished by hardware logic electric circuit is all realized by computer software control, flexible, can change revision program at production procedure at any time, senior intelligence intervention is carried out in the operation operation, realize the scientific management that packing is weighed, and alleviate service personnel work degree greatly.

Specifically introduce the present invention below in conjunction with accompanying drawing.

Fig. 1 is a structure configuration principle block diagram of the present invention.

Fig. 2 is a simplification operation program diagram of circuit of the present invention.

Among Fig. 1; belt conveyor 11 is sent the particle or the granular material of finished product into material logical sequence 10, and the below outlet of funnel shaped material logical sequence is provided with thick feeding door 1 and thin feeding door 2, then is bucket below thin feeding door 2; its lower end is openable Dump gate 3, and bagger 4.Bucket 7 is positioned at an end of the weighing lever 7 of weighting apparatus, and this end cushions pin-lift arrangement 5 in addition; Slightly be dosed into level sensor δ 1(8), carefully be dosed into level sensor δ 2(9).The other end at weighing lever 7 then has the heavy counterweight 6 of meter, and the thick feeding door 1 here, thin feeding door 2, Dump gate 3, the sackholder 4 gentle lever apparatus 5 of rushing to summit all are to handle its action with corresponding solenoid valve V1～V5 and cylinder thereof to open and close.These electromagnetic valves V1～V5 and two sensors: slightly be dosed into level sensor δ 1(8) and carefully be dosed into level sensor δ 2(9), hand switch K, all with interface case 13 in the adaptation module (can select for use U.S. ME.(MECHATRONIC EQUIPMENT INC. company produce OAC5 model) that exchanges of an industrial control unit (ICU) 13A be connected, 13 in interface case links to each other with microcomputer 14 with cable.Send corresponding control command by the Control Software in the microcomputer 14 and control each electromagnetic valve, sensor action one by one, just the technological operation of whole Weighings and packing is included in the unified planning of electromechanical integration and coordinated by the adaptation module among the interface case 13A.

The sketch of software flow as described in Figure 2.At first two bin gate V1, V2 and buffering push rod V5 all open, and feed intake to bucket fast, and the weighing lever position is cushioned push rod and limited, and can not make the sensor action.Then, whether judging feeds intake in advance will finish, and whether the δ 1 that promptly slightly feeds intake puts in place, then close V1 if put in place, stop to feed intake fast, rate of feeding is slack-off, after delaying time 1 second, the buffering push rod discharges, after weighing lever no longer is subjected to it spacing, just can carry out Weighing, at this moment, differentiate hopper again and whether reached weight basis, whether the δ 2 that promptly carefully feeds intake also puts in place.If, then close V2, finish and weigh.Judge then whether sackholder clips packaging bag (whether V4 holds successfully) if clip, just opens Dump gate V3, and the material in the hopper is unloaded packaging bag.Through delaying time 2 seconds, V3 closes, and discharging finishes.After short stay, the bottom door of sackholder is opened again.And unclamp sackholder, and packaged thing bag is fallen (V4 closes) to the belt conveyor 12 of lower end, the whole packaging process of weighing has just been finished.

The present invention implements test in the Zepu, Xinjiang of one of key state project petrochemical plant, and effect is remarkable, has improved measuring accuracy and service life of equipment, has also started good start for implementing the electromechanical integration technology transformation in this factory.

Claims (1)

1; the automatic weighing and packing machine of a kind of particle or granular material; include feed bin; by bucket; the Weighing mechanism that weighing lever and counterweight are formed; pack device; use electromagnetic valve; the thick feeding door of cylinder control action; thin feeding door; Dump gate; sackholder gentle rush to summit bar and belt conveyor; electrical control gear; it is characterized in that including in the electrical control gear photosensor of monitoring weighing lever position; and ac control module; and these contact pointless control modules are installed in the interface case that the standard industry controller is housed, the interface case then is connected with microcomputer and Control Network thereof with cable.

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