SU1148937A1 - Working member of machine for trenchless laying of drains - Google Patents

Abstract

THE WORKING BODY OF THE MACHINE FOR BEST-RACKING DREN, including a knife and a slit, characterized in that, in order to increase the efficiency of draining, the slit is located in front of the knife and pivotally connected to it in the upper part with a crank, and in the lower part with a connecting rod, at the same time, the cutter is made in the form of a batten with interchangeable cutting teeth placed on it, and the knife has two cutting blades on its working surface, made in the form of an oblique trihedral prism, truncated by a cylinder.

Description

1

The invention relates to agriculture, in particular to land reclamation machines.

A working element of the machine for laying drains is known, which contains a knife, a draining machine with an extension, and a nozzle with a supply pipe, the expander being connected to the drainage through a crankshaft having a drive located in the upper part of the blade 1.

However, this device has a complex structure.

Also known working body for trenchless laying of drains, containing a knife and slits 2.

However, in the well-known working body, the outer massive part moves and loosening of the soil occurs across the entire width of the cutting slot, which takes a considerable amount of power. The overall effectiveness of such a working body is low. In addition, the design has large oscillating unbalanced masses, which leads to strong vibration, dynamic overloads of structural elements and, as a result, the fragility of the working body.

The aim of the invention is to increase the efficiency of the draining process.

The goal is achieved by the fact that in the working body of a machine for trenchless draining, containing a knife and a slit, the latter is located in front of the knife and pivotally connected to it in the upper part by means of a crank, and in the lower part by a connecting rod, while the slit is made in the form slats with interchangeable cutting teeth placed on it, and the knife has two cutting blades on its working surface, made in the form of an oblique triangular prism, truncated by a cylinder.

FIG. 1 shows a diagram of the workflow during the operation of the machine; in fig. 2 - working body, general view, section; in fig. 3 - the same, top view.

The working body of the machine for trenchless pipe laying has a vertical passive knife 1. To reduce the cutting forces of the soil, the working surface of the knife 1 is made with two cutting blades 2 formed by truncating the oblique three-sided prism with a cylinder whose radius is equal to half the width of the passive knife 1.

In the upper part of the knife 1, a pylon 3 is fixed. In front of the knife 1, there is a slot 4, consisting of a rail 5 with interchangeable cutting teeth 6 placed on it. The lower part of the rail 5 is hinged on a balanced connecting rod 7 that has a hinge 8 inside the knife 1. On top The rail 5 is fixed on the crank neck of the crank 9. The latter is connected to the two-stage gear-worm gearbox 10 and through it to the hydraulic motor 11.

The proposed device works as follows.

5 Rotation from the hydraulic motor 11. through the gearbox 10 is transmitted to crankshaft 9. The latter converts the rotational movement into reciprocating and informs it to the rail 5 of the gap 4. Since the lower end of the rail 5 is hinged to

 The connecting rod 7, the rail 5 has a complex movement, which ensures the optimum cutting angle of the teeth 6 and the removal of the developed soil to the surface. Rod 7 and crank 9 are balanced after coupling

With rail 5 so as to compensate for the inertia forces of its reciprocating movement. This minimizes low-frequency vibrations and the dynamic effect of inertial forces on the structural elements of the working body.

0 Clicer 4, located in front of the passive knife 1, cuts through a narrow pioneer gap with a width of 8 mm. The ground left after the passage of the slits (on both sides of the pioneer gap each blade 2 is cut into two parts: the inner

5 FI and external p2. The outer parts of the soil, p2, are compacted by the side edges of the blades 2 into the walls of the drainage slot. The inside of the soil F: is cut off by the blades like a bulldozer knife, resulting in a compaction core that slides along the knife

 1 to the surface. This soil is then transported to the working body, backwards in the direction of travel (Fig. 2). To reduce the friction of the soil against steel, the side surfaces of the cutting blades are lined with a material with a small roughness (polished stainless steel).

The presence of a pioneer gap in front of the passive knife 1 and the combined cutting of the remaining soil last, with an optimal ratio of V / V (as well as FI and Pr sections), reduces the traction force required for laying drains up to 2 m in depth by 46%, which makes it possible to refuse the use of additional traction winches or high-powered tractors,

5 releasing them for other work. Laying drainage using the working body of the proposed design is highly efficient, as it is conducted at speeds up to 2.5-3.0 km / h without transverse oscillations of the working body, which are present at high cutting forces in conventional working bodies for trenchless laying of drains, and also in the presence of stony inclusions with a diameter of up to 300 mm and buried wood with a diameter of trunks up to 150 mm.

Claims (1)

THE WORKING BODY OF THE MACHINE FOR TOWELless DRINK LAYING, comprising a knife and a slit, characterized in that, in order to increase the efficiency of the process of laying drain, the slit is located in front of the knife and pivotally connected to it with a crank in the upper part and with a connecting rod in the lower part, wherein the slit is made in the form of a rail with interchangeable cutting teeth placed on it, and the knife has two cutting blades on its working surface, made in the form of an oblique trihedral prism, truncated by a cylinder.