RU2255033C2 - Screw pipe - Google Patents

Abstract

FIELD: materials handling facilities.

SUBSTANCE: invention relates to lifting and transportation machinery used in industry and agriculture for transportation of loose and wet materials and liquids. Proposed screw pipe includes guide surface made of strip coiled along helical line in longitudinal and cross directions. Guide surface is bent along straight lines at angle to strip edges to form similar parallelograms located on strip alternately in opposite sides relative to each other. Strip is turned to form cylindrical coils interconnected along longitudinal edges to form unidirectional helical lines and screw surfaces in form of triangular-shape pockets along outer and inner surfaces.

EFFECT: simplified manufacturing, enlarged operating capabilities.

5 dwg

Description

The invention relates to hoisting machines used in various industries and agriculture for transporting bulk and wet materials and liquids.

A device for transportation (A.S.No.1260306, class B 65 G 33/00, 1986), containing loading and unloading nozzles, a drive housing in the form of a column made in the form of guide elements in the form of equilateral triangles or in the form strips located around the perimeter of the column along helical lines.

A disadvantage of the known device is the complexity of manufacture and limited technological capabilities.

Closest to the proposed invention is a screw of a screw conveyor and a method for its manufacture (A.S. No. 1703584, class B 65 G 33/00, 33/26, 21 D 11/06, 1992), including a guide surface, at least three strips twisted along a helical line in the longitudinal direction and curved along helical lines in the transverse direction with the formation of the outer and inner working surfaces.

A disadvantage of the known device is the complexity of manufacture and limited technological capabilities.

The technical solution is to simplify manufacturing and expand technological capabilities.

The technical solution is achieved by the fact that in a helical pipe, including a guide surface, from a strip twisted along a helix in the longitudinal and transverse directions, the guide surface is bent in straight lines placed at an angle to the edges of the strips, with the formation of the same parallelograms located on the strip alternately in opposite directions from each other, while the strip is folded into cylindrical coils connected to each other along the longitudinal edges, with the formation on the outer and inner surface of nonapravlennyh helical screw lines and surfaces in the form of a triangular shaped pockets.

According to the patent literature not found a technical solution similar to the claimed, which allows us to judge the inventive step of the proposed screw pipe.

The novelty is that the screw pipe is made of at least one strip, which simplifies the manufacture.

The novelty is due to the fact that helical surfaces in the form of pockets of a triangular shape are formed on the inner surface, which expands technological capabilities.

The novelty also lies in the fact that only one strip is bent in straight lines, which simplifies manufacturing.

The novelty is also seen in the fact that only one strip is bent into cylindrical turns that are connected along the longitudinal edges, which simplifies the manufacture.

The invention is illustrated by drawings, where:

figure 1 shows a screw pipe, General view; figure 2 is a section aa in figure 1; figure 3 is a strip with marked straight lines; figure 4 is a strip bent in straight lines; figure 5 is a perspective view of a strip folded into a cylindrical coil.

The helical pipe (FIG. 1, FIG. 2, FIG. 3) is made of one strip 1 connected along the longitudinal edges 2 (shown in FIG. 1 by a dash-dot line) by known methods, for example, by welding, with the formation of helical lines on the outer surface ( in figure 1, one of the helical lines is shown by a thickened line 3-14) and helical surfaces of a triangular shape in the form of pockets 15, 16, 17, 18, 19, 20, 21.

Strip 1 (Fig. 3, Fig. 4) is bent along straight lines 22 located at equal distances from each other and at equal angles α to the edges of strips 2 with the formation of the same parallelograms 23, 24 located alternately in opposite directions from each other after bending friend.

The strip 1 after bending along straight lines (Fig. 4) is folded into cylindrical coils (Fig. 5), connected to each other along the longitudinal edges 2 by known methods, for example, welding, into a screw pipe.

Technical and economic advantages arise due to the creation of unidirectional helical lines on the surface, helical surfaces in the form of pockets of a triangular shape.

Claims (1)

 A helical pipe, including a guide surface of a strip twisted along a helical line in the longitudinal and transverse directions, characterized in that the guide surface is bent in straight lines placed at an angle to the edges of the strips, with the formation of the same parallelograms located on the strip alternately in opposite directions to each other to each other, while the strip is folded into cylindrical coils connected to each other along the longitudinal edges, with the formation of unidirectional screws on the outer and inner surfaces x lines and helical surfaces in the form of a triangular shaped pockets.

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