SU727453A1 - Apparatus for placing and heating-up concrete mix - Google Patents

Description

 .. t ,,, The invention relates to equipment intended for receiving cold concrete mix from a concrete-overpass or other devices, not accumulating and heating with steam in the storage hopper of the concrete mix to the place of laying and delivering it to the mold. A device is known, including a tubular blender, a hydraulic cylinder for changing the inclination of the mixer, a steam subframe. A device with perforation rubber blades and a rotation drive. steam supply system 2. However, in the known devices, uncontrolled and uneven heating of the concrete mix, unstable water saturation of the hot concrete mix, unproductive heat consumption of the environment is high and the complexity of service, the need .s associated systematic cleaning of the funnel from the hardened concrete. The purpose of the invention is intensification. qi heating the concrete mix. The goal is achieved by the fact that in the proposed device for laying and heating the concrete mix, containing a bunker made with a grate gate and mounted on the frame, an oscillation pathogen and a steam supply system, the bunker is equipped with a truncated hollow cover connected to the steam supply system a cone and a cylinder, with electric heaters placed in the cylinder cavity. The drawing shows a device for laying and heating a concrete mix. The device includes a chassis frame 1, a storage bin 2, a warming lid 3, a grate 4, a flexible steam line 5, a condensate discharge cavity 6, a condensate condensate. water 7, no iocTb 8 steam heating with electric heaters 9, pressure gauge 10, temperature sensor 11, steam dryness sensor 12, steam pipe 13 with a screen. The contour of the contact of the hopper and the cover last has a hermetic gasket 14 and the clamping device 15, which is able to force

from steam overpressure. The walls of the storage hopper have a cooling device 16. In the lower part, the funnel-shaped storage hopper below the grate has a bolt 17, for example, a maxillary. Vibrators are attached to the hopper of the storage bin 18, which are designed to impart a concrete imbalance of the Fbcc state, which is provided

its passage through the grate.

The use of the device on the technology line is possible according to two different schemes. Tiny 3 can be mounted together with the bin) OMr-Drive 2 on the chassis frame 1 or separately. On a fixed fixed frame; In addition, the bucket drive 2 can be mounted on the chassis frame 1, and the cover. 3 on a fixed fixed frame. The choice of scheme depends on the requirements

imposed on the post of laying concrete and its layout on the production line. : The device operates as follows.

The bétonyugo mixture is prepared according to the general rules, but for mixing, water is taken less than the calculated 75 L / M7, taking into account; , What. The amount of water will be replaced by steam at

its condensation. /.,:.,

The concrete mixture is loaded into the bunker at the closed position

shutter. The device, from the post of concrete and the post of heating (to a fixed stationary frame on which

the cover with the pressing device is fixed) is moved by its own course. Under the cover the device stops and all further operations on heating a portion of the concrete mix, located in the bunker-feeder, are carried out in automatic mode. Krbgshka using a clamping device tightly covers the bunker-nakrtlTTeftE and presses against it, the jawblade opens, the electric heater turns on. condensate collection and steam heating. At the same time, the Parameters of steam (condensate, temperature, dryness) are stabilized, since the power of the electric heater can be regulated from the control panel. Since the steam does not have direct contact with the external environment and is in a closed volume, the efficiency close to unity ...,

Differential pressure from different sides of the concrete mix, located in the storage bin, leads to steam pushing through the steam. This causes the steam to condense and transfer

heat and condensation of the concrete mix, and since the steam parameters are constant, the heating of the concrete mix and its water saturation are stable.

In this layer of concrete, condensation para-occurs until this layer acquires a condensation temperature. Then the steam passes nihse, where heat exchange also begins.

Thus, there is a movement of the temperature front in the thickness of the concrete mixture. Its speed depends on the amount of excess vapor pressure under the cover. When heated, the concrete layers lying on the grate, i.e. the lowermost layers, at the signal of the temperature sensor, the steam is turned off, and the lid is lifted with the help of a clamping device, the device moves by its own power to the hot concrete mixture station in the mold. Since the surface of the bunker does not have insulation and is equipped with a cooling device, in the boundary between the concrete mixture and the wall of the bunker, due to enhanced condensation of steam, water forms on the film, which is a kind of lubricant that prevents the concrete mixture from sticking to the walls of the junk.

At the post of laying hot concrete into the mold, vibro-wake is turned on and hot concrete flows through the grate, filling the mold. Further operations with the hot concrete mix that filled the mold are carried out by well-known techniques.

Claims (2)

1. Authorship certificate of the USSR 469675, cl. C04 B 41/30, 1973. 2. Authorship certificate of the USSR 543646, cl. C04 B 41/30, 1975 (prototype), V v 5 w2 $ 5 5 5 S :: 5% S: $ S:; S:%