SU1669553A1 - Device for discharging undersize product from jigging machine - Google Patents

Abstract

The invention relates to the enrichment of minerals by the gravity method and can be used in the extraction of precious and non-ferrous metals on jigging machines. The goal is to improve the quality of the discharge by improving the uniformity of the discharge. The device includes a discharge pipe (P) 1 in which a cylinder 3 with radial holes 4 is installed, connected to a water supply line. Holes 4 are made in several rows. Inside the cylinder 3 is mounted a rod 5 with a piston 6, spring-loaded spring 7 and having the possibility of vertical movement. In the lower part of the rod 5 is fixed a cone 9, which can overlap the P 1 when the piston 6 is located in the upper position. When water is supplied, the piston 6 is lowered and a gap is formed between the P 1 and the cone 9. As the water pressure increases, the piston 6 descends below and opens a number of holes 4. The water pressure on the piston 6 decreases. The piston 6 rises again and takes the position providing the predetermined clearance. The vertical oscillation of the piston 6 prevents material from jamming and contributes to the improvement of the quality of the deposit. 1 il.

Description

The invention relates to the enrichment of minerals by the gravitational method and can be used in the extraction of precious and non-ferrous metals on jigging machines.

The purpose of the invention is to improve the quality of the discharge by improving the uniformity of discharge.

The drawing schematically shows the proposed device, section.

A device for unloading the undersize product of the jigging machine consists of a discharge pipe 1 with a nozzle 2 made, for example, of rubber. Inside the pipe 1, a cylinder 3 is installed with radial holes 4 made in several rows. Inside the cylinder 3, a rod 5 is mounted connected to the piston

6, which is spring-loaded with a spring 7. held by the circlip 8.

A cone 9 is fixed in the lower part of the rod 5. The cylinder 3 is connected to a water supply line (not shown) by a crane. The piston 6 is mounted on the opposite end of the stem 5 of the cone 6.

A device for unloading the undersize product works as follows.

When you turn on the jigging machine, a valve is connected to the water supply line, as a result of which water is supplied to the cylinder 3 under pressure.

Under the influence of water pressure, the piston 6, mounted on the rod 5, compressing the spring

7, begins to sink. The cone 9, mounted on the rod 5, also begins to fall, as a result of which a gap S is formed between the cone 9 and the discharge nozzle 2.

Since water is supplied to the cylinder 3 under pressure, then after lowering the piston 6 below the holes 4, its excess flows through these holes, the pressure of the water on the piston 6 decreases.

The total area of the holes 4 of each row provides through them a certain flow rate. The pressure of the water supplied to the cylinder 3 during the operation of the machine is constant, therefore, the piston 6, having dropped under the influence of water pressure below a certain number of holes'4 (rows of holes), compressing the spring 7, occupies a certain position inside the cylinder 3.

As a result of balancing the pressure of water on the piston 6 by the compression force of the spring 7, the size of the formed gap S between the unloading nozzle 2 and the cone 9 is maintained constant during operation of the machine, which ensures continuous and uniform unloading of the under-sieve material and reliable operation of the device.

Having taken a certain position, the piston 6 (with a selected pressure of water supplied to the cylinder 3) performs vertical oscillatory movements relative to the last row of holes 4, below which it falls.

This is because when lowering the piston 6 below a certain series of holes, allowing excess water to flow through them at a selected pressure, the water pressure on the piston 6 decreases, the piston 6 stops and starts to move upward, overlaps the holes 4 of the first upstream row, resulting in a pressure water per piston increases again, etc.

Thus, having dropped below a certain number of holes 4 (rows), the piston 6 occupies a certain oscillating (relative to the last row) position in the cylinder 3.

The undersize material that accumulates in the discharge nozzle on the cone 9, ’’ moving out of the vibrating surface of the cone 9, is continuously and uniformly unloaded into the gap S maintained during the unloading process.

The pressure of the water supplied to the cylinder 3 is selected based on the required size of the gap S between the discharge nozzle 2 and the cone 9, which provides continuous and uniform unloading of the under-sieve material of a certain size.

As a result of the oscillatory movements of the cone 9, the under-sieve material is not tamped on the cone, but slides from its inclined surface, which prevents the device from jamming and thereby increases operational reliability.

The water flowing out of the holes 4 also contributes to loosening the accumulated under-sieve material, reducing the likelihood of compaction and tamping on the cone 9.

During operation of the jigging machine, it may be necessary to increase or decrease the gap S due to a change in the characteristics of the material being enriched, as well as a change in its quantity.

To do this, the pressure of the water supplied to the cylinder 3 is changed (increase or decrease), the pressure of the water on the piston 6 also changes, and as a result of balancing the pressure of the water, it takes a new position in the cylinder 3, rising or falling relative to a certain row of holes 4, respectively increasing or reducing the size of the gap S between the discharge nozzle 2 and the cone 9.

The invention makes it possible to ensure reliable uniform unloading of the under-sieve material during enrichment, and to eliminate the possibility of jamming. Using the device allows you to adjust the process of unloading the under-sieve material depending on the characteristics of the enriched product. 10

Claims (1)

SUMMARY OF THE INVENTION A device for unloading an under-sieve product of a jigging machine, including an unloading nozzle with a locking device in the form of a cone mounted on the rod, mounted for vertical movement, characterized in that. in order to improve the quality of unloading by improving the uniformity of unloading, it is equipped with a cylinder located inside the discharge nozzle with rows of radial holes connected to the water supply line, while the rod is installed inside the cylinder and is made with a spring-loaded piston mounted on the opposite end of the rod.