RU96311U1 - WORKING BODY OF FORESTRY FIRE UNIT - Google Patents

Abstract

 The working body of the fire-fighting unit, containing knives placed on the disk with a curved cutting edge, made in the form of a spiral section with a radius growing from the minimum radius rmin to the maximum radius rmax, and the knives are mounted on the disk so that the angle between the rear edge of the knife and the plane of rotation of the cutter equal to 7-15 °, and rotated relative to the trailing edge in the direction of movement at an angle of 7-15 °, characterized in that the knives are rigidly fixed to the carrier disk, placed in the guide casing, and are made with bent ends at an angle of 90 ° to the side opposite to the direction of movement of the unit.

Description

The utility model relates to fire fighting equipment, namely to rotary working bodies of tools operating on the principle of transverse milling of the soil, designed to create protective mineralized strips in the prevention and suppression of forest fires.

Known working body of a tillage cutter, containing a disk with vertical knives fixed along its circumference, having a front straight cutting edge made along a parabola. Loosening elements are fixed on both sides of each knife (SU No. 1464912, MKI A01B 33/02, bull. No. 4, 1972).

The disadvantage of this device is that the cutting edge is straightforward, therefore, when a collision occurs with an obstacle, the cutter stops, which allows passes on the mineralized strip to be laid and can also lead to deformation or breakage of the cutter.

Known tillage cutter forest fire stripper containing placed on the disk knives with a curved cutting edge. The cutting edge of the knives is made in the form of a portion of a spiral with a radius increasing from minimum to maximum radius (RU No. 2257038, IPC АВВ 33/08, 33/10, bull. No. 21, 07/27/2005).

The disadvantage of this device is that, in practice, the cut soil is placed in a groove cut in the soil, thereby reducing the width of the mineralized strip.

The utility model solves the problem of increasing the efficiency of localization and extinguishing of forest bottom fires.

The technical result is to ensure the excavation of cut soil from the grooves cut out in the soil and laying it next to this groove.

The specified technical result is achieved by the fact that in the working body of the fire-fighting unit containing knives with a curved cutting edge located on the disk, the novelty is that the knives are rigidly fixed to the carrier disk placed in the guide casing and are made with bent ends at an angle of 90 °, to the side opposite to the direction of movement of the unit.

The implementation of the knives, which are soil throwers, with the ends bent at an angle of 90 ° opposite the direction of movement of the unit, allows you to move the cut soil from the cut groove.

Rigid fastening of the knives on the carrier disk, placed in the guide casing, allows you to further grind the soil by hitting it against the walls of the casing and lay next to the cut groove.

Figure 1 presents a General view of the working body of the forest fire unit; figure 2 - view A; figure 3 - knife with a thrower; figure 4 is a rear view.

The working body of the forest fire unit (Fig. 1) includes a disk 2 mounted on the shaft 1, placed in a guide casing 3, fixedly attached to the forest fire unit. On the disk 2, knives 4 are rigidly fixed with a curved cutting edge, in the form of a portion of a spiral with a radius growing from the minimum radius r _min to the maximum radius r _max (Fig. 3), and the knives are mounted on the disk so that the angle between the rear edge of the knife and the plane of rotation of the cutter is 7-15 ° (figure 1) and rotated relative to the trailing edge in the direction of movement by an angle equal to 7-15 ° (figure 2). The ends of the knives 4 are bent at an angle of 90 ° in the direction opposite to the direction of movement of the unit, and are soil throwers 5. Soil throwers 5 allow you to move the cut soil from the cut groove.

The working body of the forest fire unit operates as follows. With the movement of the forest fire unit, the shaft 1 rotates with the disk 2 and knives 4. Knives 4 separate the chips from the soil mass. Soil throwers 5 when separating the shavings from the soil array move it with their plane into the guide casing 3, where it is further crushed by impacts on the walls of the casing 3. Additionally, crushed soil is laid next to the cut groove. Using the proposed invention allows to move the cut soil from the grooves cut out in the soil and to lay it next to this groove, thereby increasing the width of the support strip.

Claims (1)

The working body of the fire-fighting unit, containing knives placed on the disk with a curved cutting edge, made in the form of a spiral section with a radius growing from the minimum radius r _min to the maximum radius r _max , and the knives are mounted on the disk so that the angle between the rear edge of the knife and the plane the rotation of the cutter is 7-15 °, and rotated relative to the trailing edge in the direction of movement by an angle of 7-15 °, characterized in that the knives are rigidly fixed to the carrier disk, placed in the guide casing, and are made with bent ends at an angle 90 ° to the side opposite to the direction of movement of the unit.