SU578843A3 - Device for removing bark from cut-off wood branches - Google Patents

Description

There is a partition 4 inside the drum. Other suitable means can be used to separate the percussion elements from the treated wood pieces, for example, a water separator 5,

The drum 1 contains an outer shell having a pair of conical sections 6 and 7 in the form of truncated cones connected by a central cylindrical section 8. The end of section 7 is attached to a smaller, fixedly mounted section 9, also having the shape of an installed cone. The end 10 of section .9 has a window for the release of bark, leaves and other wastes resulting from the processing of wood segments in drum 1.

On the inner surface of the drum 1, there are mounted longitudinally extending blades 11 for circulating inside the drum wood segments 12 and a plurality of impact elements 13 to be processed.

The baffle plate 4 is fixedly mounted inside the drum 1 and extends therein in the longitudinal direction so that it is generally located near one side and inclined relative to the vertical plane passing through the longitudinal axis of the drum. The configuration of sections 6 and 7 is such that tree segments 12 and impact elements 13 tend to concentrate in the central section 8 and in parts of sections 6 and 7 having a larger diameter. The baffle 4 is removed from the walls of the drum 1 in order to allow the blades 11 to pass during the rotation of the drum, with a greater distance between the end of the baffle and the walls of the drum 1 and the right end of the baffle 4 attached to section 9.

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As shown in FIG. 4, the drum 1 is rotatably mounted counterclockwise around its longitudinal axis by any suitable method, for example, friction wheels 14, which engage the cylindrical center section 8. Each wheel 14 can be mounted on a separate shaft 15 supported on rotation 16, and they may be driven by a Sleep motor (not shown), connected by a belt (not shown) to a pulley 17, respectively connected to the shaft 15.

The device comprises an air separation system 3 for removing bark as it descends from tree segments 12. This system includes a fan 18 connected by an air line 19 to a fixed section 9 of drum 1. A fan 18 can draw air into the drum through its open end 2. Rotary to lapanna plastic

Tin 2O, passing from the baffle 4 and through the stationary section 9, forces air to pass around the lower end of the partition 4 at the place where the wood segments 12 and the impact elements 13 are located and where the bark from the wood segment is most likely. ov

To separate the bark from the air flow, the fan 18 may be connected by the chute 21 to a separator 22 large particles. The second chute 23 may connect the separator 22 to the cyclone separator 24, where fine particles are separated and collected in the hopper 25, S, clean air flow is discharged from the outlet pipe 26.

To separate the treated wood sections 12 from the percussion elements 13, the contents of the drum 1 can be discharged into the flotation separator 5, where the wood sections 12 can float on the surface of the water 27 poured into the separator and the percussion elements 13, as denser, will be collected in the sump 28 from where they can again be sent to the drum 1 together with tree segments, from which the bark is not partially removed.

A device for removing bark from pieces of woody branches works as follows.

Wood sections 12 and impact elements 13 are loaded into the drum 1 through its open end 2, after which the drum is rotated. Wood} 1st segments 12 and percussion elements 13 due to this circulate under the action of the blades 11 upwards and towards the center of the drum. The height to which these particles rise inside the drum 1 is determined by the rotational speed, therefore the rotational speed of the drum must be large enough for these particles to be carried to the upper end of the drum, but it must be less than the critical centrifugal velocity that otherwise would To keep particles 12 and 13 near the inner surface of the drum 1. It was established experimentally that about 70% of this critical speed is sufficient for the effective operation of the device.

Impact elements 13 should have a raft HvXJTb, which is several times higher than the density of wood segments 12, and it is desirable that they be smaller in size. Although the percussion elements 13 and the wood segments 12 can move along one and the same path, in fact, the entire work of removing the bark is carried out by the percussion elements 13 due to their relatively higher density compared to the density of the tree. Each segment 12 of the tree receives generally uniformly and randomly distributed surface shocks and abrasions from shock ephements. 13 If the unit of impact energy lies above the critical level determined by the wood species and its physical state, then the connection between the bark occurs gradually and evenly. and wood, and the cord quickly leaves the tree. At the same time, it is possible to achieve effective removal of bark from tree segments of various sizes and shapes. Practically, pieces of wood have a length of twelve to fourteen inches, although they may be longer or shorter. Also, the cross-sectional size of the segments may be used over a wide range, but it is desirable that this size be in the range of two to six inches.

During the processing of the wood segments 12 in the drum 1, the fan 18 draws air through the open end 2 of the drum and creates an air flow passing through its internal cavity, which picks up and removes the bark from the drum 1, but also the rod , leaves and dirt, resulting from the processing of wood segments in the drum. Further, the flow of contaminated air from the fan 18 through the chute 21 is directed to the separator 22, where large parts of the waste are separated. Then the air through the chute 23 enters the cyclone separator 24, where small particles are extracted from it and collected in the bunker 25, and clean air flow is led through the pipe 26.

After removing the bark from the wood segments 12, they are separated from the percussion elements 13, for example, by unloading the contents of the drum 1 into the flotation separator 5, where the treated wood sections float on the water surface 2.7, and the more dense percussion elements 13 are collected in the settler 28, from where they can be sent back to drum 1.

After loading into the drum 1 of the new portion of the tree branches to be processed, the cycle of operation of the device is repeated.

Form, l and inventions

A device for removing bark from cuttings of tree branches, including a rotating drum with working bodies in the form of shock-impactors freely located in it} and with protrusions on the inner surface, interacting with these impact elements, characterized in that bark is removed The device is equipped with a stationary reflective partition passing inside a rotating drum, dividing its cavity in a longitudinal direction into two chambers, one of which is working and communicated with A tree for loading and stripping of tree branches and percussion elements from it, and a friend connected to a window to exit the bark of the drum, while on the side of one of the ends of the rotating drum there are mounted means for creating an air flow through its internal cavity in the direction from the window downloads and unloads to the bark exit window.

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