SU1535462A1 - Device for removing protection film - Google Patents

Abstract

FIELD OF THE INVENTION The invention relates to agricultural machinery, in particular to machines for removing protective films. The aim of the invention is to improve the quality of the cleaning film. The device comprises a frame 1 with a guiding element 2 fixed on it in the direction of movement of the film, a film cleaning mechanism with a supporting platform 3 consisting of two rollers, a shaft with a counter-wound helical winding 5 and a film winding mechanism 6. The film cleaning mechanism is made in the form of an eccentricity in the direction of the guiding element of the rotor 4 with elastic blades of different lengths in contact with the bearing pad, which are installed in alternate order. The eccentricity with the parameters of the rotor and the rollers is related to the ratio given in the description of the invention. During operation of the device, the film enters the guiding element 2 and further to the supporting platform 3, where its contaminated areas are cleaned with elastic rotor blades 4 and the rollers of the supporting platform 3. The cleaned film melts on the shaft 5 and enters the film winding mechanism 6. 1 hp f-ly, 2 ill.

Description

The invention relates to agricultural machinery, in particular to devices for removing the protective film mainly from vegetable crops.

The aim of the invention is to improve the quality of the cleaning film.

FIG. 1 shows a device for removing the protective film, side view; in fig. 2 — rotor with elastic blades together with a support platform made of two rollers.

The device for removing plastic film (Fig. 1) is aggregated with a tractor and consists of a frame 1, a guide element 2, a support pad 3, a rotor k, a shaft 5 with a counter-wound winding and a winder 6. The frame 1 rests on the support wheels 7.. The drive is carried out from the tractor's power take-off shaft with the help of a cardan shaft 8, central and lateral gears 9 and chain drives 10 and 11.

The support platform (Fig. 2) consists of two rollers 12 with a working surface, made of corrugated, of elastic material, installed with the help of axes 13 in the frame with the possibility of rotation.

pn

00 SP

4 in 0 GO

31535 2

The rotor is a shaft 15 with elastic blades 16 and 17 of greater and lesser length fixed on it at the places of contamination of the film (for example, four of each length). FIG. 1 and 2 also shows the plastic film 18 to be cleaned.

In the indicated in FIG. 2 dashed and curved lines of rectangular triangles К1Ю and MNO, the hypotenuse of KO and MO are equal by the Pythagorean theorem, В

D + dg,

four

+ e) + H2.

ABOUT)

Where

d + d 2 H -A

R

e) g + Ng

(2)

minimum distance from the center of the rotor to the line connecting the centers of the rollers.

Raise equation (1) and (2) to the square and subtract the second expression from the first, we get

(D + d + Zdfc-Au) (D-d) (3)

e where d

8B

u

diameter of the rotor at the ends of the blades of greater length; d is the diameter of the rotor at the ends of the blades of shorter length; diameter of rollers;

the magnitude of the vertical deformation (deepening) of the blades when in contact with the rollers (blades of greater length with the second drum, blades less than the length of the first drum, including guide element 2);

B is the distance between the rollers. The magnitude of the vertical deformation (deepening) of the blades. When the film cleaning process is performed most efficiently, it is determined experimentally (equal to 10-20 mm) and is determined by the interaction of the blades of greater length with the second drum, is equal to the vertical deformation of the blades of shorter length of the interaction with the first roller.

The condition under which the blades of smaller length do not collide with the second roller (Fig. 2):

 - L 2 L 2

or d D-2 &.

WITH

Raise Eqs. (1) and (2) and squaring the expressions, after simple transformations we get

en

ten

15

20

d

25

thirty

th 35 to 45 and

55

1 (d5 + 2d + 2D) -2liJ-8e2 n 2T 2

The device works as follows.

In operation, the film 18 enters the guiding element 2 and further onto the supporting platform 3. The film from the top along the edges, along the edges and in the central part from the bottom, where it rests on the soil crests, is contaminated.

When the film passes through the supporting platform 3, the elastic blades 16 and 17 of the rotor k sweep the soil from the top along the edges of the film tape. The soil due to the bending of the film tape at the entrance to the device spills to the ground from the edges of the film tape. Elastic blades 16 and 17 have a dynamic effect on soil particles adhering to the film from the bottom along the edges and in the center. Separated from the bottom of the film as a result of striking the elastic blades 16 and 17 of the rotor, soil particles are sifted between rollers 12. The soil particles that remain below the film are exposed to the grooved surface of the rollers 12.

At the same time, as a result of shock pulses from the side of the blades 16 and 17, acting on the film, 0.1-0.2 mm thick, and through it on the rollers 12, the rollers 12 are slowed down due to friction on the film (Fig. 2) (rollers 12 rotate clockwise, acting tangentially to the surface of the rollers 12, the shock pulses from the blades 16 and 17 tend to rotate the rollers 12 counterclockwise, and the second, counting from the guide element, the roller acts only on the blade 16 of greater length, and the first Drum is affected by both types of blades 16 and 1, however, the shock pulse of the longer blades is quenched when interacting with the second roller, and they are not significantly affected by the first drum, which is affected by the shock pulses of the short blades 17, resulting in a relative slip of the bottom surface of the film 18 along the rollers 12, and thereby cleaning the bottom surface of the film.

Due to the deformation of the elastic surfaces of the rollers 12, they are self-cleaning from soil particles. Cleaned up

the film spreads on the shaft 5 with a counter-wound screw and enters the mechanism 6

winding

film.

Claims (2)

1. A device for removing the protective film, comprising a frame and a guide element secured thereto along the film movement direction, a film cleaning mechanism with a support platform located underneath it, a shaft with a counter wound winding and a film winding mechanism, characterized in that improving the quality of film cleaning, the supporting platform is made in the form of two rollers, and the film cleaning mechanism is designed as an eccentricity in the direction of the guide element ro1535 62 five 0 tori with elastic blades of different lengths in contact with the bearing pad, with long and short blades mounted on the rotor in an alternating order, and the eccentricity value e is determined from the ratio (D + d + 2dB-4u) (D-d) eJ., where D is the diameter of the rotor at the ends blades of greater length; d is the diameter of the rotor at the ends of the blades of shorter length; dB is the diameter of the rollers; And - the value of the vertical deformation (depth) of the blades; B is the distance between the rollers. 2. The device according to claim 1, about tl and the fact that the working surface of the rollers is made of corrugated, of elastic material. /four fig 2