SU1141141A1 - Installation for heating disintegrated material - Google Patents

Abstract

1. INSTALLATION FOR HEATING OF CRUSHED MATERIAL, mainly old asphalt concrete, having a heating chamber adjacent devices for loading and unloading, placed in the heating chamber of the upper and lower plates of the capacitor and connected to the latter microwave energy generator, characterized in that reduce energy consumption and improve operational conditions J; the heating chamber is equipped with clamp contacts and movable screening devices located at the junction of the devices for loading and unloading The upper partitions of the capacitor are made vertically movable, and the bottom is in the form of, with a metal pallet and symmetrically located on its sides conductive surfaces, interacting with pressure surfaces. 2 Installation according to claim. 1, ex. (L that the device for loading is equipped with a device for leveling the surface of the S heated material. 4 "Mi 4

Description

1 The invention relates to the preparation of building materials, in particular to devices for heating up crushed and loose materials with microwave energy when repairing pavements. A device for heating the material is known, which contains a working capacitor, the upper plate of which is connected to the microwave energy generator, and the lower plate is designed as a base for transporting the material and is grounded. The disadvantage of the device is uneven heating of the product. Uneven material flow increases the consumption of electrical energy, Moreover, a large number of moving parts reduces the reliability of work. Closest to the invention is a device for heating a material, including a heating chamber, adjoining devices for loading and unloading material placed in the chamber of the upper and lower plates of the capacitor and the 2J microwave energy generator connected to the capacitor. A disadvantage of the known device is that it eliminates the possibility of adjusting the gap between the upper plate of the capacitor and the surface of the material being processed, which causes uneven heating of the material, resulting in inefficient use of energy costs, and there is no protection of the personnel from harmful radiation from the discharge side. loading device, deteriorating the operating conditions of the installation, in addition, the open sides of the heating chamber lead to heat loss. The purpose of the invention is to reduce energy costs and improve operational conditions. This goal is achieved by the fact that in a plant for heating crushed material, mainly old asphalt concrete, having a heating chamber, adjoining devices for loading and unloading, placed in the heating chamber of the upper and lower plates of the condenser and connected to the last microwave generator. energy, the heating chamber 1, 2 is equipped with pressure contacts and located at the place of contiguity of the device for loading and unloading movable shielding partitions, the upper plate of the capacitor is made vertically cial movable, and the bottom - in the form of a trolley with a metal plate and symmetrically arranged on its sides conductive surfaces cooperating with clamping surfaces. In addition, the loading device is equipped with a device for leveling the surface of the heated material. FIG. 1 shows the proposed installation, the general view; in fig. 2, section A-A in FIG. one; in FIG. 3 a section BB in FIG. 1, The unit for heating the crushed material, mainly old asphalt, has a heating chamber 1, an upper condenser plate 2 mounted therein, which is powered by a microwave generator (not shown), a pull rod 3 for suspending the plate 2 to the vertically movable cross bar A insulators 5, carriage 6 with a metal pallet 7, the sides of which are made of electrically insulating material, for example, fluoroplastic. The cart 6 for accommodating the asphalt concrete 8 to be heated is provided with conductive surfaces 9 symmetrically arranged on its sides from electrically conductive material, for example copper. The installation also has a nepodvizy-. The yoke is JO with the drive screw 11 mounted on it 11, which rotates the gear 13 through the screw thread. The lead screw 12 connects with the beam 4 to move along the guide rails 14. The heating chamber 1 is equipped with lugs 15 made of high electrical conductivity material which replicate the accidental movement of the carriage 6 with the pallet 7 along the vertical, and the pressure contacts 16. In FIG. 2. A variant is presented for the filling of the pressure contacts 16, made in the form of wedges 17 with blue cylinders 18. On the construction of the chamber 1 copper plates 19 are installed for better contact. According to this variant, the conductive surfaces 9 of the carriage 6 are also filled in the form of wedges. FIG. 3 shows an embodiment of the contacts 16 of the plates with bent sections with springs 20 and flexible conductors 21, for example, from copper foil, with this current 11, and the surfaces 9 of the carriage 6 are made in the form of similar plates 22. The heating chamber 1 is adjacent to one loading chamber 23, on the other hand, discharge chamber 24, which are separated from chamber 1 by heating movable shielding walls .i 25, and fixture 26 for leveling the surface of the material with device 27 for adjusting its position is installed in loading chamber 23 and height. The installation works as follows. The carriage 6 with the pallet 7 is placed in the loading chamber 23, while the partitions are retracted. The crushed asphalt concrete 8 that has been in service is fed into the loading chamber 23, where it fills the pallet 7 of the carriage 6, which in this case is only a vehicle. After the loading is completed, the carriage 6 with the pallet 7 is moved to the heating chamber 1. As the cart 6 moves from the loading chamber 23 to the heating chamber 1, the device 26 dumps excess material, ensuring that it is evenly positioned relative to the level of the pallet 7. The trolley 6 stops in the heating chamber 1 and at this position by means of power cylinders 18 move the pressure contacts 17, which interact with the contact surfaces 19 and 9 of the carriage 6, creating a reliable electrical contact of the camera 1 and those of the beds 6 and ensuring a good copy of the latter. The cart 6 in this case performs the function of the bottom plate of the condenser. The top plate 2 of the condenser is installed with a drive 11 by means of a choke screw 12 with a certain clearance relative to the asphalt concrete 8. The bridges 25 return to their original position, isolating the heating chamber I from the loading chambers 23 and 24 unloading. The microwave generator is turned on and the energy of 4 electromagnetic fields is fed to the upper plate 2 of the capacitor. Asphalt concrete 8 is heated. If necessary, the air gap between the top plate 2 and asphalt concrete 8 can be changed directly during the heating process. After the required temperature has been reached, the ng-heating of asphalt concrete is disconnected by the microwave generator and the wedge 17 is retracted downward using the hydraulic cylinder 18. The partition 25 is opened and the cart 6 with heated asphalt concrete 8- enters the unloading chamber 24, from which the heated asphalt concrete is transported further according to the accepted technology. When performing the pressure contacts 16 according to the embodiment shown in FIG. 3, the installation works in the same way as described above. The springs 20 are compressed when the trolley 6 enters the heating chamber 1, and when the trolley 6 exits the spring 20, the contacts 16 return to their original position. The proposed plant for the restoration of used asphalt concrete implements the most progressive method of heating non-conductive materials with microwave currents, which is characterized by inertialessness compared to heating by external heat sources, which allows for more accurate dosing of the degree of heating, helps to reduce energy costs and increase thermal efficiency process. In the proposed installation, a further increase in the degree of uniformity of heating is achieved by a symmetrical arrangement of the conductive surfaces of the carriage, which is the bottom plate of the capacitor. This arrangement contributes to the ordering of the passage of the electromagnetic energy flow of the microwave field. In addition, the use of a material equalizer and a device for adjusting the position of the top plate of the capacitor relative to the material being heated also contribute to increasing the degree of uniformity of heating and ensure optimum operation. Shielding partitions not only exclude harmful effects on the staff, but also help to reduce heat energy losses.

The implementation of the invention will provide savings in bitumen and inert materials added to old asphalt concrete due to more paBHOMepHord, and consequently, better preparation of asphalt concrete.

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Claims (2)

1. INSTALLATION FOR HEATING MILLED MATERIAL, mainly old asphalt concrete, having a heating chamber / adjoining devices for loading and unloading, placed in the heating chamber the upper and lower plates of the capacitor _o and connected to the last microwave energy generator, characterized in that, with In order to reduce energy consumption and improve operating conditions, the heating chamber is equipped with clamping contacts and movable shielding elements located at the junction of the devices for loading and unloading The walls are divided by kami, the upper plate of the capacitor is vertically movable, and the lower one is in the form of a trolley with a metal pallet and current-conducting surfaces symmetrically located on its sides interacting with the clamping surfaces. · - 2. Installation according to π. 1, characterized in that the device for loading is equipped with a device for smoothing the surface of the heated material.