SU1666623A1 - Device for laying of vertical antifiltering curtain - Google Patents

Abstract

The invention relates to hydraulic construction and can be used for laying vertical film impervious to air curtains in various soil structures. The purpose of the invention is to increase the reliability of the work by preventing the film from jamming in the discharge slot when it is laid and the soil getting stuck in the discharge slot when the casing is opened and the casing moves backwards in the soil. The device contains a hydraulic actuator 2, a cutting knife 3. A vertical hollow vertical casing 4 consisting of the left 5 and right sidewalls is rigidly attached to the knife 3. The rear edges of the sidewalls are installed with a relative longitudinal displacement in the horizontal direction. Attached to the rear elastic edges of the sidewalls are knives 11 mounted with an inclination to the axial vertical plane of the casing 4. When the casing 4 moves backward in the ground, the knives 11 under the action of a component cutting resistance force of the ground directed normally to the surfaces of the casing sidewalls. The gap between the knives 11 (the outlet slit 9) is closed. The access of the soil to the cavity 7 through the slit 9 is blocked. 2 Il.

Description

The invention relates to hydraulic construction and can be used for laying vertical film impervious to air curtains in various soil structures.

The purpose of the invention is to increase the reliability of the work by preventing the film from sticking in the outlet slot when it is laid and the soil is stuck in the outlet slot when the casing is opened and the casing moves backwards in the soil.

FIG. 1 shows a device for laying a vertical impervious filter curtain; figure 2 - section aa in figure 1.

The device is hung on the base machine 1 and contains a hydraulic actuator 2 for the penetration of the flat cutting knife 3 (passive working body). A hollow vertical casing 4 is rigidly attached to the knife 2, consisting of left 5 and right 6 sidewalls. Sidewalls 5 and 6 are installed with a gap and form a film cavity 7, an inlet 8 and an outlet 9 slit. In the cavity 7, parallel to the knife 3, there is a plate 10, which is inside the casing 4 with a gap of 3-10 mm from the inner walls of the sidewalls 5 and 6 and is fixed rigidly with its ends. Rear edges of sidewalls 5 and 6

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installed with relative longitudinal displacement (in FIGS. 1 and 2, the rear wall of the sidewall 5 is installed with advance along the movement of the base machine relative to the rear edge of the sidewall 6). To the rear edges of the sidewalls 5 and 6, knives 11 are rigidly attached, mounted with an inclination to the axial vertical plane of the casing 4. Above the casing 4 on the supports 12 and 13 the roll 14 with the film 15 is fixed in a horizontal position.

The proposed device works as follows.

A roll 14 is placed on the supports 12 and 13. The film 15 is stored inside the casing 4. At the same time, the film 15 covers the plate 10. Then the knife 3 is sunk together with the casing 4 attached to it into the ground. The edge of the film 15 emerging from the casing is fixed relative to the ground. The base machine 1 is set in motion, while the knife 3 cuts a slit in the ground through which the casing 4 is pulled. The edge of the film 15 fixed in the ground causes a tension of the film inside the casing 4, while the film 15, overcoming the friction resistance, slides along the surface plate 10 and causes unwinding of the roll 14; Behind the outlet slit 9, the film remains in the dirt slot in a vertical position in the form of a necessary curtain. When moving in the ground of the casing 4, the soil exerts pressure on the sidewalls 5 and 6, under the action of which the cavity 7 and the slots 9 are narrowed. Attached to the rear edges 5 and 6, the knives 11 do not extend beyond the dirt gap cut by the knife 3, and therefore they do not provide additional resistance to movement in the soil of the casing 4. However, the knives 11 serve as ribs of the most deformed section of the casing 4 - the rear edges of the sidewalls 5 and 6. The knives 11 significantly reduce the amount of deformation of the edges of the sidewalls 5 and 6 and provide the width of the slit 9 necessary for pulling the film. At the moment of stopping in the ground

the casing 4, the loosened soil remaining behind the slit 9, tends to fill the slit in the soil, cut by the knife 3, and fall down in the direction of the slit 9. Crushed

the soil is retained on the inclined outer surfaces of the knives 11 and does not pass into the cavity 7 through the slot 9. If the rear speed of the base machine 1 is accidentally turned on, as well as when the casing 4 is dug out of

Claims (1)

When the horizontal component of the movement of the casing 4 appears backward, the outer surfaces of the knives 11 abut against the ground and move there, experiencing resistance to cutting the ground. The resistance to cutting the ground with the knives 11 on the surfaces of the knives 11 unfolds. Under the action of a component of the resistance to cutting the ground with knives 11, directed normally to the surfaces of the sidewalls 5 and 6, the knives 11 approach each other, the gap between them (discharge slot 9) closes, preventing the passage of soil through the slot 9 into the cavity 7. Formula of the invention Vertical stacking device of an impervious curtain that includes a knife body mounted on the base machine to form a gap in the ground, a roll with a film, a hollow film casing with horizontal inlet and vertical outlet slits, containing in its cavity a guide plate for reversing the film and formed by two flat side triangles Forms that, in order to increase reliability by preventing the film from sticking in the discharge slot when laying it and sticking the soil into the exhaust slot when the casing is recessed and the casing moves in the ground, reversing, the rear edges of the left and right casing sidewalls are installed with longitudinal displacement in plan relative to each other and provided with rigidly attached 5 to them knives, installed with a slope to the axial vertical plane of the casing. 12 14 / / 13 i / // / 2