SU1495221A1 - Device for emtying bags and weighing loose materials - Google Patents

Abstract

The invention relates to installations for unpacking, wiping and weighing lightweight bulk materials, explosive, toxic materials. The purpose of the invention is to simplify the design, automate the technological process, ensure the safety of working with toxic and explosive substances. The installation contains a unpacking device 1 of bags 2 with bulk material, consisting of a receiving table 3, a gripper 4 and side grippers 5, a wiping sieve 9, consisting of a movable body 10 with a grid 11, a wipe cross 12, brushes 13, a receiver 17 empty bags and an automatic weighing dispenser 18, including a load-receiving capacity 19, mounted on electro-tensometric load cells 20, and a pneumatic actuator valve 21 unloading. The unpacking device and the wiping sieve are connected by a hermetic composite chute 6 to an elastic damping clutch 7. The dispenser and the wiping sieve are interconnected by a flexible hermetic connection 22. 1 Cp. 1 il.

Description

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The invention relates to installations for unpacking, wiping and weighing lightweight bulk containers. explosive, toxic materials.

The aim of the invention is to simplify the design of the installation, automate the process, ensure the safety of working with toxic and explosive substances.

Simplification of the design is achieved by aggregating three main devices: unpacking, wiping and dosing into one unit, which allows to exclude feeders, transport tanks and operations with them from the block diagram.

The connection of the unpacking device with a wiper screen through an inclined chute allows the material to automatically pass through technological plants from top to bottom, i.e., by gravity. The execution of the chute by a composite equipped with an elastic-damping coupling allows the wiper screen to be protected during sieving into the weighing dispenser from the variable dynamic loads created by the unpacking device. Making the trough an airtight width equal to the width of the receiving table of the unpacking device, connecting the dispenser inlet and wiping screen exit with a flexible sealed connection ensures safety when working with toxic and explosive substances.

A through-section of a rectangular-shaped gutter having a width equal to the width of the receiving table of the unpacking device ensures the laminar flow of the bulk material. Reducing the length of the guide grooves, through which the bulk material flows, reduces the accumulation of static electricity charges to a value that does not ignite the dusty environment during installation operation.

The drawing shows the overall layout of the proposed installation.

The installation consists of a unpacking device 1, a sled 2 with a bulk material and is equipped with a receiving table 3 with a grip 4 and side grips 5 a shed.

The installation also contains a composite chute 6 with a connecting intermediate elastic-damping coupling 7, the input of the chute 6 is equipped with a pneumatic actuator valve 8. The chute 6 is inclined and connects the unpacking device 1 with a wiper sieve 9 equipped with a movable body 10 with a grid 11 with which the wipe cross contacts 12, with the brushes 13, the chute 6 and the grid 11 being grounded through the current meter.

The vertical shaft 14, at the base of which the crosspiece 12 is rigidly fixed, has an electric drive 15, and the housing 10 is mounted on four springs 16.

Unpacking device 1 is equipped with a receiver 17 empty small cells.

The installation also includes an automatic weighing dispenser 18 with a load-carrying capacity of 19, installed on electro-load measuring sensors 20 (for example, system 1858 UHT) and with pneumatic drive valve 21 unloading.

The wiping sieve 9 and the dispenser 18 are interconnected by a flexible sealed bond 22.

The installation works as follows.

A multi-layer MCUJOK 2 paper with an internal polyethylene layer, filled with flowing material, is pre-opened on the feed conveyor with disk knives (not shown) and fed to the unpacking device 1 on the receiving table 3, the grip 4 of which is sealed by the opening edge of the mezzanine 2, and the side tongs 5 Fix the cells 2 on the receiving table 3 and hold it until complete emptying of the bulk material, including the period of rotation of the table 3 for unloading, stopping the table 3 opened by the edge of the measuring room 2 against the entrance to the groove 6, the period of opening 3 slonki 8 with the pneumatic cylinder 4 and waste capture period output section 3 in the reset position meschka. After withdrawal of the grip through the opened window in the cell 2, the bulk material is emptied, after which the grippers 5 are lowered into the marks 2 and it falls, partially touching the already closed valve 8 into the receiver 17 empty cells.

The bulk material from the bed 2 falls on the inclined chute 6 and is gravitationally supplied to the receiving tank of the housing 10 of the wiping sieve 9, the tank 10 of the sieve providing the receiver with one bag 2 of the bulk material, after which the wiper cross 12 evenly moves the fed material over the entire grid surface 11. The shaft 14 of the crosspiece 12 has an electric drive 15, which provides 12 rpm crosspiece with a reverse every 6 turns.

Four brushes 13 due to the end beats oscillate the body 10 mounted on four springs 16, and force the grid 11 to sift the powder, increasing the loading speed of the dispenser 18.

The rubbed material is deposited in the load-receiving container 19 of the dispenser 18 until a portion of the material has accumulated. As soon as the electrotometric weight measuring sensors 20 register the desired weight of the material, the actuators 15 of the unpacking and wiping devices (not labeled) receive a signal to disconnect them, and the pneumatic actuator of the valve 21 of the dispenser 18 is given a signal to open and unload the material.

At this point, the cycle ends, the flap 21 of the dispenser 18 is closed again, the unpacking device 1 and the wiping system 9 are turned on.

The unit is controlled from the console (not labeled).

The static electricity protection of the chute 6 and the load-carrying capacitance 19 is earthed via a current meter controlling the unpacking 1 and wiping devices 9 when dangerous charge values accumulate (grounding is performed in a known manner and not shown).

Claims (2)

Invention Formula . A device for unpacking bags and weighing bulk materials, including the unwrapping device, the wiping screen, the weighing dispenser, which, in order to simplify the design, automate the process, ensure the safety of work with toxic and explosive substances, the unpacking device and the wiping screen are interconnected by a sealed composite inclined chute equipped with an elastic damping intermediate the coupling, the width of the groove is equal to the width of the receiving table of the unpacking device, while the input of the dispenser and the exit of the wiper sieve are connected by a flexible he tightly coupled 2. Installation according to claim J, characterized in that the flow area of the groove has the shape of a rectangle.