SU549330A1 - Apparatus for controlling a flux containing ferromagnetic particles - Google Patents

Description

one

The invention relates to pipeline hydro- and non-motorized transport of bulk ferromagnetic materials and can be used to control flows in hydro- and pneumatic transport of ores in mining enterprises during hydrotransporting magnetite suspensions in coal processing plants and in other sectors of the national economy.

A device is known for controlling the flow of hydraulic and pneumatic mixtures containing ferromagnetic parts by means of an adjustable movable magnetic field created inside a pipeline section of a nonmagnetic material. The magnetic field inside the pipeline is created using an adjustable magnet mounted outside the pipeline. The magnet can reciprocate along the conduit and thus accelerate or decelerate the flow velocity. The magnitude of the stroke and the speed of movement of the magnet are regulated by 1.

A disadvantage of this device is that it can be effectively used only at insignificant velocities and flow cross sections, since the magnetic field must affect the entire flow cross section. By increasing the diameter of the pipeline, the gap between the poles increases, the magnetic resistance in this area increases, and consequently, the force exerted by the magnetic field on the particle decreases.

It is also known a device for controlling the flow containing ferromagnetic particles by exposing it to a magnetic field created by a system enclosing a pipeline of permanent magnets and a coil of a solenoid 2.

This device is in its technical essence closest to the proposed invention.

A disadvantage of the known device is that it does not provide precise flow control. In addition, the flow-through parts of the device are not protected from the action of ferroparticles, which reduces its reliability.

The purpose of the invention is to increase the reliability and efficiency of the device.

This is achieved by the fact that the proposed device is equipped with a non-magnetic sleeve on which the coil of the solenoid surrounding it is rigidly fixed, the latter being enclosed in a magnetic circuit of magnetically soft material whose ends are poles of the solenoid, and this permanent magnet system is located coaxially inside the sleeve and made in the form of a package of alternating annular thin-walled

elements of magnetic and non-magnetic material.

The drawing shows the proposed device, a General view.

On the sleeve 1, made of a non-magnetic material, the coil of the solenoid 2 is rigidly fixed, placed in the magnetic circuit consisting of the housing 3 and the flange 4 rigidly attached to it. The sleeve 1 is sealed in the housing and the flange 4 by means of elastic sealing rings 5. Inside the sleeve 1 a package is composed of alternating thin-walled elements of magnetic-hard 6 and non-magnetic material 7. At the ends of the housing 3 and the flange 4 are rigidly fixed connecting pipes 5, made of non-magnetic material. The end of the body 3 and the flange 4 are the solenoid poles. The package of annular elements, axial holes in the housing 5, the flange 4 and the inner walls of the connecting pipes 3 form the flow part of the device. When this passage holes in the non-magnetic elements 7 have a smaller diameter than in the inserts 6.

The device works as follows.

When the coil of the solenoid 2 is de-energized, a thin protective layer of ferromagnetic particles is kept on the walls of the magnetic part due to the residual magic of the elements 6 and the magnetic core, which protects the flow-through part from abrasive wear. The protrusions formed by elements 7 contribute to the retention of this layer in the oriental part. When current is supplied to coil 2, a magnetic field is induced in the magnetic conductor of the solenoid, the poles of which go into the flow part of the device. The magnetic lines of force at the first moment are closed through the poles, the magnetic-hard elements 6 and the protective layer of ferromagnetic particles. Since the magnetic conductivity of a moving stream of a hydraulic or pneumatic mixture is much lower than the magnetic cores, and the elements 6 of a magnetic-rigid material have a small wall thickness, which ensures their saturation by closing the main part of the magnetic field through the layer of ferromagnetic material. poles and originally formed

four

LAYER, reducing the magnetic resistance of the system.

As the current increases, the magnetic flux increases and its effect on the transported particles increases. In this case, the layer a of ferromagnetic particles increases. Thus, the magnitude of the current in the solenoid coil can regulate the thickness of the layer a, i.e., the size of the through-hole in the pipeline.

Flow control by decelerating the ferromagnetic particles with a magnetic field is not across the whole section, but due to throttling of the flow due to a layer of ferromagnetic particles held by zero on the inner walls of the pipeline requires less energy and is more economical.

The absence of nozzles and the protection of the lower part of the device with a layer of ferromagnetic particles increases the reliability and service life of the regulating device.

Claims (2)

1. The patent of Germany No. 1775964, cl. F 16 K 31/06, 1974. 2.Certificate of Certificate No. 2161584/08, July 21, 75.