SU115306A1 - Mobile concrete mixing plant for continuous operation - Google Patents

Description

Known mobile concrete mixing plants with a capacity of up to 30. However, the dosing of the constituent materials in these installations is not carried out with the accuracy provided for by the technical conditions, and the installation and disassembly is calculated in a few days.

In the proposed mobile concrete mixing plant of continuous action, these disadvantages are eliminated, since disassembling the device does not require disassembly into separate units.

The drawing shows schematically an installation placed on two platforms of a trailer and a truck.

The installation consists of two separately mounted units, each of which is loaded directly onto a transport device (platforms of trailers and cargo platforms or railway platforms).

The operation of the mobile concrete mixing plant is carried out according to the following flow chart.

The cement delivered by the cement truck is discharged into the ground bunker, from which a vertical screw 2 is fed to the silo jar 3. From the silo jar 3 with a screw 4, the cement is directed through the dosing funnel 5 with the outlet nozzle 6 into a screw feeder with two screws 7 consisting of one above the other screws 5 and I, of which at the top screw 5 there is a constant pitch of the screw, and at its screw there is a 9-variable screw that decreases towards the outlet. At the same time, the screw 8 moves the cement in the opposite direction compared to the screw 9. Such a device stabilizes the cement flow, eliminates the possibility of its expiration and allows the delivery of cement with a constant bulk density.

JMb 115306

From a screw dosing unit with two screws 7, the cement flows through the chute 10 into a conventional continuous funnel 11 of a two-shaft concrete mixer 12.

The described unit, as well as a skip hoist 13 with two buckets 14 (intended for issuing finished products), is mounted on a single frame and is not dismantled during transportation.

Inert aggregates (sand and sand, eben) are loaded into the system of bins 15 and fed to ribbon-type dosing machines 16 located under each bunker. The manty type tape metering device 16 consists of a frame 17, a belt conveyor 18, a gate valve 19 and a system of levers 20 that connect the valve 19 with the frame 17 and the conveyor 18.

The amount of material supplied is determined by the speed of the conveyor belt 18 and is adjusted depending on the given capacity and thickness of the material on the belt conveyor 18, the layer thickness being maintained by a gate valve 19. The size of the gap 19 is set by a counterweight (not shown) of the system of levers 20 depending on from a given dosage of material. The conveyor 18, in the event of a change in the weight of the material on its belt, will change its position relative to the horizontal axis, and the system of levers 20 will correspondingly change the position (clearance) of the gate valve 19.

From maternal-type tape metering devices 16, inert materials are fed to a collecting belt conveyor 21, last loaded onto an inclined belt conveyor 22, by which materials are fed to a continuous mixer 12.

The described hoppers, dispensers and conveyors are mounted on a separate frame 23 and are a single unit that cannot be disassembled into separate units during transportation.

The plant is powered by its own power station 24, and can also be powered by a general-purpose AC power supply.

The unit is controlled from the control panel. All installation mechanisms are interlocked.

Subject invention

Claims (4)

1. A mobile concrete mixing plant of continuous action mounted on transport devices and consisting of a continuous concrete mixer with two paddle shafts, hoppers and dosing units for cement, sand, rubble (gravel), a water tank, a skip hoist and a console for centrally controlling the unit, In order to improve the accuracy of the dosing of sand and rubble (gravity), the dispensers are tape-type, for the cement the dispenser is screw-shaft two-shaft. and a hydraulic skip hoist with two buckets operating alternately on two opposite sides was used to ensure continuous operation of the concrete mixer. 2. The form of the installation according to claim 1, characterized in that, for the purpose of continuous dosing of concrete aggregates, such as sand, gravel, rubble, etc., a dummy-type tape feeder with weight levers and necessary weights (weights) suspended from the chute, and the conveyor axis passes through the center of the chute, so that with a certain weight of material located on the conveyor, an equilibrium with a rod-type metering system is created. 3. The form of the installation is in pp. 1 and 2, characterized in that, in order to regulate the layer of material on the tape metering device of the mating type, there is a hinged connection of the weight levers with a gate valve located at the outlet chute, and when the weight of the material passing through the conveyor is deviated from the given weight, the gate valve changes the cross section of the outlet hole of the chute, thereby changing layer of material entering the conveyor belt. 4. The form of the installation of PP. 1.2 and 3, characterized in that, in order to stabilize the flow of cement, eliminate possible arbitrary expiration of it and dispense cement with a more constant volumetric weight, the screw feeder is made with two screws located one above the other, and the upper screw has a constant pitch the screw, and the bottom variable, decreasing towards the outlet.