SU1327961A1 - Lining - Google Patents

Abstract

The invention relates to structural elements of devices for crushing, grinding and transporting mineral raw materials, in particular to linings. The purpose of the invention is to increase the service life and improve the manufacturability of the plate. The lining consists of plates 1 with wear-resistant inserts 2 fixed in them, which are located at an angle of 40-60 °. to the longitudinal axis. The total area of wear-resistant inserts takes 35-60% of the working surface of the plate. Wear-resistant inserts have protrusions 8 on large lateral faces and are made of trapezoidal cross-section. The slab has recesses 3 along the perimeter for attaching it to the collar, the surface. 2 Il. / CO with N3 CO 05

Description

The invention relates to structural elements of devices for crushing, grinding and transporting mineral raw materials, namely, linings, and can be used in the mining, coal, construction, mining, chemical and other industries.

The purpose of the invention is to increase the service life and improve the manufacturability of the plate.

FIG. 1 shows a lining plate, top view; in fig. 2 is a section A-A in FIG. I.

The lining has plates 1 of rectangular shape made of durable plastic material, for example carbon steel, in which wear-resistant inserts 2 are fixed, for example, from high-chromium cast iron. Inserts 2 are located at an angle of 40-60 ° to the longitudinal axis of the plate. The plate has along the perimeter of the recess 3 and (or) holes 4 for connecting it with the surface to be protected.

The plate is attached to the protected surface across the flow direction 5 of the rock mass with its longitudinal axis using electric welding along the recesses 3 and (or) holes 4. At the same time, wear-resistant inserts secure the soft steel base of the plate from the rock mass, as well as the place of welding the plate with the protected by the surface.

The notches 3 and the holes 4 are located in the zone shielded by the wear-resistant inserts 2, therefore the welding points are protected from abrasive wear by the inserts 2. The inserts 2 are made with a trapezoidal cross-section.

The lower base 6 of the trapezoid is 6–12 mm wide of the upper base 7. The lower base 6 is located inside the steel base 1. Each insert on the large lateral faces has protrusions 8. Inserts 2 occupy 35-60% of the working surface of the plate.

The lining plate is made as follows.

First, wear-resistant material, such as high-chromium iron, is used for inserts of the form described. The inserts are installed in the cavity of the casting mold for casting the lining plate with respect to their number and location according to the invention. The prepared casting mold is poured with steel. Due to the grapezoidal cross-section of the inserts 2 and the presence of protrusions 8 in the process of shrinkage of the steel during its cooling, a monolithic construction of the plate is formed with the inserts firmly fixed at it at an angle of 40-60 ° to the longitudinal axis. After the required heat treatment (for maximum insert hardness), the plates are mounted on the surface to be protected by welding through recesses 3 and (or) from 0

versti m 4 so that the longitudinal axis of the plate was located transverse to the direction of flow 5.

Lining plate works as follows.

The horn mass moves along the working surface of the lining plate in the direction of flow of the rock mass 5. Due to the location of the wear-resistant inserts, the abrasive material moves along the inserts tops, which are relatively mild steel protected from wear, and the welding area is separated by holes (holes), and ms in the shielded area. Wear of the steel does not occur as long as no wear t5 with wear-resistant inserts. Therefore, reliability of fastening of the plate and increase of its service life are achieved.

Example. Lining plates with dimensions of 250X80x28 m are made of 25L steel. Wear resistant inserts have

 at an angle of 45 ° to the longitudinal axis of the plate. The plates have around the perimeter of eight grooves of a triangular shape with a depth of 12 mm for welding, located in a shielded area with wear-resistant inserts. Inserts have

5 trapezoidal cross section, width of the lower base 22 mm, width of the upper base 15 mm. Height of inserts is 18 mm. The inserts have protrusions on large lateral edges of 3 mm wide.

The inserts are made of wear-resistant cast iron ICP318x3 and occupy 38% of the working surface of the plate. On the surface, for example, of a bunker through which iron ore moves, the lining plates are fixed by electric welding along the grooves so that their longitudinal axes

five

located transverse to the direction of movement of the rock mass. The life of the hopper wall is increased by more than eight times.

The invention allows to increase the service life of the surface protected from wear, increasing the turnaround time, reducing repair costs and metal consumption to protect these surfaces.

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Claims (1)

Invention Formula Lining, mainly for bins, containing rectangular plates made of durable plastic material with inserts of wear-resistant material on the working surface, characterized in that, in order to increase the service life and improve the manufacturability of the plate, the inserts are made across the entire width of the plate, arranged at an angle of 40-60 ° to the longitudinal axis of the plate and occupy 35-60% of the working the surface of the slab, the cross-section of the inserts has the shape of a trapezoid, the larger base of which is recessed into the body of the slab, and the slabs have notches along the perimeter. Srig.G.