RU206063U1 - Thermoregenerative device for mixing bitumen-containing materials - Google Patents

Abstract

The utility model relates to the field of construction, namely to thermo-regenerative mixing devices, and can be used for the recycling of bitumen-containing roofing materials in the overhaul of roofs. The device contains a frame (15) mounted on a frame mixing chamber (1), having a cylindrical inner wall (4) in the lower part, a unit for loading (5) bitumen-containing materials into the mixing chamber, a unit for unloading (6) the finished mixture from the mixing chamber, a unit heating (2) mixing chamber and mixing unit (3). The mixing unit (3) contains a shaft (8) located in the mixing chamber (1), blades (10) fixed on the shaft (8) in pairs by means of pins (9), and a shaft rotation drive (14) fixed on the frame (15). Adjacent pivots (9) on the shaft (8) are oriented perpendicular to each other. In this case, each blade (10) has a flat central part (11) oriented at an angle (40-50) ° to the axis of the shaft (8), as well as two oppositely directed side parts (12) oriented perpendicular to the axis of the shaft (8). Moreover, the size of the gap (a) between the end edge (13) of the blade (10) and the cylindrical inner wall (4) of the mixing chamber (1) does not exceed 5 mm. The technical result is an increase in the intensity of mixing and, as a consequence, the homogeneity of the finished mixture. 5 p.p. f-ly, 8 dwg

Description

[01] Technical field

[02] The utility model relates to the field of construction, namely to thermo-regenerative mixing devices and can be used for the recycling of bitumen-containing roofing materials in the overhaul of roofs.

[03] State of the art

[04] In the patent of the Russian Federation for the invention RU 2182867, 05/27/2002, a mixing installation for the production of roofing material from previously dismantled crushed layers of an old bitumen-roofing material coating is described. The installation contains a mixing chamber with inlet and outlet units installed obliquely with the possibility of rotation, a heating device and an agitator located in the chamber in the form of a shaft with annular elements mounted on it. Each annular element consists of two rings, a hub, a pair of wide blades and two pairs of narrow blades rigidly connected to the hub and rings, in addition, all the blades are rotated relative to the axis at an angle that provides optimal conditions for the movement of the bitumen-roofing material mass along the planes of the blades, and each ring element is turned along the axis of the shaft relative to the previous one in the direction that ensures the advancement of the bitumen-roofing material in the direction opposite to the direction of unloading.

[05] In the patent of the Russian Federation for a useful model RU 105613, 20.06.2011, a similar design is proposed, in which annular elements and a screw blade of the screw are installed on the shaft of the mixing unit on the outer surface of the annular elements. Each annular member is composed of one ring and one pair of diametrically disposed blades rigidly connected to the hub and rings blades ring member are rotated relative to the axis by an angle α ₁ which provides optimum mixing conditions and axial movement of the mixture and each annular member is spaced from an adjacent in the region of its length and rotated around the shaft axis relative to the previous annular element at an angle β = 90 °, and the relative position of the blades of the annular elements and the screw blade of the screw with an angle of attack α ₂ meets the conditions α ₁ ≥ _{α 2} and the different directions of their angles of attack. In this case, the mixing unit is installed below the axis of the mixing chamber by 5-10% of its diameter so that the outer end edge of the helical blade is involved in the process of dispersing the ingredients and other inclusions of the mixture in the gap, the size of which is less than the thickness of the boundary layer of the liquid component of the mixture on the shell surface of the lower parts of the mixing chamber.

[06] The disadvantage of these analogs is the low efficiency of mixing, the limited ability to use as a raw material not only roofing material, but also modern materials based on fiberglass, fiberglass. The screw device described in the above patents facilitates the unloading of the finished mixture, but at the same time makes it difficult to uniformly heat and mix the bitumen-roofing material mass (accumulation of a cold mixture in the unloading zone, the formation of unmixed slags).

[07] The closest analogue is the mixing device, disclosed in the patent of the Russian Federation for utility model RU 21756, 08/10/2001. The device includes a mixing chamber with a cylindrical inner wall in the lower part, a unit for loading bitumen-containing materials, a unit for unloading the finished mixture, a unit for heating the mixing chamber and a mixing unit installed in the mixing chamber. The mixing unit contains a shaft on which hubs with blades and auger elements are fixed. The stirrer blades are made helical relative to its shaft, and the screw elements are located at the end of the shaft.

[08] The disadvantage of this analogue is the limited functionality and low efficiency of the device. The design of the blades of the auger and the mixer provides for double movement of the processed material in the volume of the mixing chamber - first in the direction opposite to the unloading direction, and then in the unloading direction. The elements of the screw do not allow mixing with full heating of the bitumen-roofing material mass, since the unheated bitumen-roofing material mass during the rotation of the shaft accumulates in the form of a piece of bitumen-containing mass in the unloading area, which can lead to jamming of the drive. In this case, the process of heating the entire mass without mixing leads to the formation of coke on the inner walls of the mixing plant in the places where the heating elements are installed. [09] Disclosure of the essence of the utility model

[010] The main technical problem to be solved by the claimed utility model is to ensure the efficiency of the mixing device.

[011] The technical result of the utility model is to increase the intensity of mixing and, as a consequence, the homogeneity of the finished mixture.

[012] The specified problem is solved, and the technical result is achieved in the utility model due to the fact that the thermoregenerative device for mixing bitumen-containing materials contains: a frame; a frame-mounted mixing chamber having a cylindrical inner wall at the bottom; unit for loading bitumen-containing materials into the mixing chamber; unit for unloading the finished mixture from the mixing chamber; mixing chamber heating unit; and a mixing unit including a shaft located in the mixing chamber, blades fixed on the shaft in pairs by means of pins, and a shaft rotation drive fixed to the frame. Adjacent pivots on the shaft are oriented perpendicular to each other. Each blade has a flat central part oriented at an angle of (40-50) ° to the shaft axis, as well as two oppositely directed lateral parts oriented perpendicular to the shaft axis. In this case, the size of the gap between the end edge of the blade and the cylindrical inner wall of the mixing chamber does not exceed 5 mm.

[013] In addition, according to particular embodiments of the utility model:

[014] - the end edge of the blade has an arcuate profile;

[015] - the heating unit is made in the form of electric heating elements, closed from the outside with a thermal protective casing

[016] - unit for loading bitumen-containing materials includes a loading hopper located in the upper part of the mixing chamber,

[017] - the unit for unloading the finished mixture includes a receiving tray,

[018] - the frame is equipped with transport wheels.

[019] Unlike analogs, in the claimed utility model in the mixing unit, blades of a special shape are used, which are located with a gap of no more than 5 mm relative to the inner cylindrical wall of the mixing chamber, while the adjacent blades on the shaft are oriented perpendicular to each other, which contributes to grinding heated bitumen-containing roofing materials into a homogeneous mass and increases the intensity of mixing, which contributes to the rapid dispersion of all components of the material.

[020] The orientation of the central part of the blades at an angle of (40-50) ° in combination with the cross orientation of adjacent pins (and blades) allows the working elements of the blades to cover the entire volume of the mixing chamber both when rotating in one direction or the other, each blade with its own orientation carries out a local movement of the mixture in its zone, which increases circulation and makes it more chaotic due to this, better dispersion and mixing of the mixture is carried out in the entire working area of the chamber. When the values of the angle of inclination of the central parts of the blades go beyond the specified interval, the formation of zones with a low intensity of mixing is possible.

[021] The presence of side parts (edges) of the blade is caused by the need for more complete capture of the mixture and an increase in the mixing speed.

[022] The presence of a gap between the blade and the chamber wall of no more than 5 mm contributes to improved grinding of the raw materials, and also prevents the formation of coke on the inner walls of the chamber, which impairs the operation of the device and the quality of mixing.

[023] The rejection of the elements of the screw allows in a shorter period of time to produce uniform heating and mixing of the bitumen-roofing material mass, which increases its plasticity.

[024] In addition, the combination of the design features of the blade and the specified gap between the blade and the chamber wall makes it possible to disperse fractions of bitumen-containing roofing waste, the basis of which is not only cardboard, but also fiberglass, fiberglass and fiberglass. Thus, the thermo-regenerative mixing device allows using not only roofing material as a raw material, but also processing waste of modern roll materials.

[025] Brief Description of the Drawings

[026] The utility model is illustrated by the figures, where:

figure 1 shows a general view of the device in cross section;

Figure 2 shows a general side view of the device with the casing removed;

Figure 3 shows the design of the mixing unit;

Figure 4 shows a front view of the blade;

Figure 5 shows a top view of the blade;

Figure 6 shows a photograph of a roofing material obtained using

analogs;

Figures 7 and 8 show photographs of a roofing material obtained using the claimed device.

[027] Structural elements are designated in the figures by the following reference numbers:

1 - mixing chamber,

2 - heating unit,

3 - mixing unit,

4 - cylindrical inner wall of the chamber,

5 - node for loading materials,

6 - unit for unloading the finished mixture,

7 - thermal protective casing,

8 - shaft,

9 - kingpin,

10 - blade,

11 - the central part of the blade,

12 - lateral part of the blade,

13 - end edge of the blade,

14 - gear motor,

15 - frame,

16 - wheel.

[028] Implementation of the utility model

[029] The claimed device contains the following main elements: a frame (15), a mixing chamber (1), a mixing chamber heating unit (2), a material loading unit (5), a ready-mix unloading unit (6) and a mixing unit (3).

[030] The frame (15) is the base of the device on which all the elements are mounted. For ease of transportation, the frame (15) can be equipped with wheels (16).

[031] The mixing chamber (1) is formed by a thermoregenerating body, which has a cylindrical inner wall (4) at the bottom. In the upper part, the chamber (1) can have inner walls in the form of a rectangular parallelepiped or other shape.

[032] The unit for loading materials (5) into the mixing chamber is made in the form of a loading hopper located in the upper part of the chamber (1). The unit for unloading (6) the finished mixture from the mixing chamber includes a slide gate and a receiving tray.

[033] The heating unit (2) of the mixing chamber is made in the form of electric heating elements located outside the chamber (1) and closed with a thermal protective casing (7).

[034] The mixing unit (3) includes a shaft (8) located in the mixing chamber (1), on which a row of pins (9) (fingers) is fixed with blades (10) installed in pairs on both sides relative to the shaft (8). In this case, adjacent pivots (9) are oriented at right angles to each other.

[035] Each blade (10) is made in the form of a flat element with folded edges. In this case, the blade (10) has a central part (11) oriented at an angle α = 40-50 ° to the axis of the shaft (8), as well as two side parts (13) directed in different directions, which are perpendicular to the axis of the shaft (8). Thus, the side parts (13) are oriented to the central part (11) of the blade (10) at an angle β = 40-45 °. It is most preferable to place the central part of the blade (10) at an angle to the shaft axis α = 45 ± 1 °. Nevertheless, deviations of the inclination angle of 5 ° are permissible, which does not lead to a significant deterioration in the mixing quality.

[036] The end edge (13) of the blade (10) preferably has an arcuate profile, which ensures that the blade adheres along the entire length of the edge to the walls of the mixing chamber and increases the working area of dispersion.

[037] The gap (a) (minimum distance) between said edge and said inner cylindrical wall (4) of the mixing chamber (1) should not exceed 5 mm.

[038] The shaft of the mixing device is driven in rotation by means of a drive (14) in the form of a motor-reducer fixed to the frame (15).

[039] The device operates as follows. By means of the loading unit (5), roofing bitumen-containing materials (based on cardboard, fiberglass, fiberglass, etc.) are loaded into the mixing chamber (1) and mixed at a temperature of 190-200 ° C. In the zone of conjugation of the blades (10) and the inner cylindrical wall (4) of the chamber, intensive grinding and dispersion of materials occurs. At the same time, waste oils and waste polyethylene are additionally introduced into the mixing chamber (1) to restore the lost hydrocarbons. The finished liquid mixture is unloaded from the chamber (1) using the unit (6) and is used directly for the restoration of the roof of buildings and structures.

[040] To confirm the effectiveness of the proposed device, photographs of a waterproofing roofing VIR-PLAST obtained from a recycled multi-layer roofing felt carpet using analogues (figure 6) and using the claimed device (figures 7 and 8) are shown. In the case of analogs, the cooking time is at least 5 hours, while the resulting material is not homogeneous, there are fragments of bituminized cardboard. In the case of the claimed device, the cooking time is 2-2.5 hours, and the resulting material does not have fragments of the base of the processed material and is characterized by greater homogeneity.

Claims (6)

1. Thermoregenerative device for mixing bitumen-containing materials containing a frame (15), a mixing chamber (1) installed on the frame, having a cylindrical inner wall (4) in the lower part, a unit for loading (5) bitumen-containing materials into the mixing chamber, an unloading unit (6) of the finished mixture from the mixing chamber, the heating unit (2) of the mixing chamber and the mixing unit (3), including the shaft (8) located in the mixing chamber (1), the blades (10), fixed on the shaft (8) in pairs by means of pins (9) , and fixed on the frame (15) drive (14) of rotation of the shaft, characterized in that adjacent pivots (9) on the shaft (8) are oriented perpendicular to each other, each blade (10) has a flat central part (11) oriented at an angle of 40-50 ° to the axis of the shaft (8), as well as two oppositely directed side parts (12), oriented perpendicular to the axis of the shaft (8), while the size of the gap (a) between the end edge (13) of the blade (10) and the cylindrical inner wall (4) with the mixing chamber (1) does not exceed 5 mm. 2. Device according to claim 1, characterized in that the end edge (13) of the blade (10) has an arcuate profile, 3. The device according to claim 1, characterized in that the heating unit (2) is made in the form of electric heating elements, closed from the outside by a thermal protective casing (8). 4. The device according to claim 1, characterized in that the loading unit (5) of bitumen-containing materials includes a loading hopper located in the upper part of the mixing chamber (1). 5. A device according to claim 1, characterized in that the ready-mix unloading unit (6) includes a receiving tray. 6. Device according to claim 1, characterized in that the frame (15) is provided with transport wheels (16).

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