SU1000355A1 - Apparatus for moving ferromagnetic loads on air cushion - Google Patents

Description

(54) DEVICE FOR MOVING FERROMAGNETIC CARGOES ON THE AIR BAG

one

The invention relates to pneumatic transport, namely to devices for transporting ferromagnetic cargo on an air cushion.

A device for mixing ferromagnetic weights on an air cushion 5 is known, which contains a tray with valves embedded in the holes in its bottom, each of which consists of a stepped glass provided with the guides, in the side wall of which a hole is made, and a permanent magnet mounted in the glass with a recess under the guides of the cup and with a through channel. The guides of the cups are located in its upper part, and the notches are made in the form of bald spots in the upper part of the lateral surface 15 of the permanent magnet 1.

In the device, the formation of a jet of compressed air occurs in the through channel of the permanent magnet, which is inclined toward the vertical. With this arrangement, the inclined through channel with respect to the incoming jet is an obstacle. Full force of influence on this barrier is directed along the normal to the wall.

channel and causes a static magnet to skew in the glass.

Due to the fact that the compressed air under the transported load is fed through one hole of the glass, there is a limited flow, which may not be enough to create a stable air cushion under the moving load. Since the upper part of the glass is open on the side of the slip plane, small ferromagnetic particles can accumulate and dust, dirt, etc. can enter the gap between the permanent magnet and the inner walls of the glass. This leads to the difficulty of the motion of the permanent magnet in the glass, and to its jamming. In the upper part of the side surface of each permanent magnet, flats are made under the guides, which leads to a decrease in the working area of the magnet, as a result of which the force of attracting the magnet to the ferromagnetic load decreases. The manufacture of a through channel in a permanent magnet makes the value of the angle of inclination depend on the geometrical dimensions of the permanent magnet, which makes it impossible to unify the valve.

In addition, to reduce the pressure loss of compressed air to friction in the through-channel of the permanent magnet, its surface requires careful treatment using special tooling, which is complex and labor intensive.

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

The goal is achieved by the fact that in the device for moving ferromagnetic weights on an air cushion the glass in its upper part is provided with an overlap in which the channel is inclined to the vertical, and an additional opening is made in the side wall of the glass, which is diametrically opposite to the above-mentioned hole in it, The through-channel of the permanent magnet consists of a vertical section and a horizontal section connecting both holes in the wall of the glass.

The cup guides are made in the form of pins fixed to the bottom of the cup, and each recess is a cylindrical hole.

The thickness of the overlap of the stepped cup is (34-4) dk cosot, where dk is the diameter of the channel in the overlap; l is the angle of the channel to the vertical.

FIG. 1 schematically shows a device, a section; in fig. 2 shows section A-A in FIG. one.

The device comprises a tray 1, in which holes 2 are made, in which stepped glasses 3 are installed, made of a light non-ferromagnetic material, for example, plastic. The glass 3 has a cylindrical shape and is fastened to the tray 1 with screws 4. It has a permanent magnet 5 in which a passage channel is made, having a horizontal 6 and a vertical 7 sections. In the lower part of the permanent magnet there are blind holes 8 in which the pins 9 enter with a gap. The pins 9 are fastened, for example, by means of a threaded connection on the lid 10, which, in turn, is fastened to the glass by 3 screws 11. The upper part of the glass 3 on the side of the slide plane of the device has an overlap 12 in which a channel 13 inclined to the vertical is made at an angle of оС. The thickness of the overlap 12 for forming a jet of compressed air is of the order of (3-1-4) dk, cosot, where dk is the diameter of the channel . Two holes 14 are made in the side surface of the glass 3 on the diametral axis, which coincide with the horizontal section 6 of the channel of the permanent magnet 5 when it is in the upper position. The holes 14 cups 3 originate in the air supply chamber 15, which, in its

turn, the pipe 16 is connected to a source of compressed gas. In order to avoid the occurrence of a discharge under the bottom surface 17 of the permanent magnet 5 as it moves upwards, as well as to prevent the pressure of the compressed gas from increasing, the latter is provided with a drain hole 18 that connects the atmosphere with volume 19 formed by a recess in the cover 10. The volume 19 communicates with the gaps obtained between the plugs 9 and the blind holes 8. To prevent leakage of compressed gas from the chamber 15 at the points of installation of the glasses 3, the tray 1 is equipped with seals 20. A seal 21 installed between the lid 10 and glass 3, prevents unproductive flow of compressed gas through the valve assembly.

The device works as follows.

In the absence of a ferromagnetic load in the zone of action of the permanent magnet 5, the latter under the action of its own weight is in the lower part of the glass, thereby its side surface closes the access of compressed gas to the inclined channel 13. The bottom surface 17 of the valve lies on the flap 10, and pins 9, The gaps 8 of the permanent magnet 5 entering with a gap do not allow the latter to rotate about a vertical axis.

In this case, when the ferromagnetic load passes over the permanent magnet 5, the latter is attracted by the action of magnetic forces, aligning the holes 14 in the wall of the cup 3 with the horizontal 6 and vertical 7 portions of the channel of the permanent magnet 5, with an inclined channel 13 in the upper part of the cup 3 and allows access of compressed gas under the transported load to form an air cushion. After the ferromagnetic load has passed, the magnet forces no longer act on the magnet and under the action of their own force they are lowered along the guide pins 9 to the lower position and sit on the lid 10. At the same time, the compressed gas that has somehow fallen under the lower surface 17 of the constant the magnet 5 is forced out through the drain hole 18 to the atmosphere.

In this device, the cup on the side of the slip plane has an overlap that prevents contamination of the rubbing surfaces of the permanent magnet to the inner surface of the cup, which, together with the supply of compressed gas from the air passage chamber to the feed channel through. Stakhan holes, located on diametrically opposite lateral surfaces by means of channels of a permanent magnet intersecting at a right angle, prevent the last

Claims (2)

Claim 1. A device for moving ferromagnetic loads on an air cushion, containing a tray with valves built into the holes in its bottom, each of which consists of a stepped glass provided with guides, in the side wall of which ₅ holes are made, and a permanent magnet installed in the glass, made with a recess under the guides of the glass and with a through channel, characterized in that, in order to increase reliability, the glass in its upper part is provided with a ceiling in which the channel is inclined to the vertical side the second wall of the glass has an additional hole located diametrically opposite to the aforementioned hole in it, and the through channel of the permanent magnet consists of a vertical section and a horizontal section connecting both holes in the side wall of the glass. 2. The device according to π. 1, characterized in that the guide tubes are made 20 in the form of pins, mounted in the lower part of the glass, and each recess is a cylindrical hole.