DE3325678A1 - CHAIN-CHANGING SLIDE WITH STRETCHING - Google Patents

Description

Or. Paul Deufel

K 1631 Lw / Ge DipL-Phys.

Dr.-Ing. Dieter Otto

Dipl.-Ing.

Cast basalt plant. Kaienborn

Dr. Ing.Mauritz KG

D-5461 Kaienborn near Linz / Rhine

Manhole spiral slide with expansion section

The invention relates to helical shaft chutes, in particular to blind manhole helical chutes, consisting of an end face Adjacent shots with an expansion shot to compensate for the expansion compensation.

Such spiral chutes, as used in underground mining, generally have, if it is a blind shaft spiral slide with a diameter of 1250 to 1650 mm. These blind shaft spiral slides consist of a tube, divided into individual sections, which are flanged to each other are connected. These sections have heights of 700 to 1100 mm. Inside the shots is the top to bottom Continuous spiral at the bottom in the wall of the wefts realized. The spiral is placed in such a way that a 360 ° spiral extends over two sections.

D-8000 Munich 2 POB 26 02 47 Cable: Telephone Telecopier Infotec 6400 B Tel «

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The heights of such blind shaft spirals reach up to several hundred meters, so that one can easily understand the significance of the wear and tear that occurs can. Changes in temperature and the degradation of the coal cause movements that lead to expansion and Lead to upsets in these blind shaft coils. Therefore, appropriate distances of approx. 20 m are required Expansion options provided, in the form of special expansion shots.

So far, for the steel jacket or the pipe

Expansion problem solved by the fact that the pipe in this Area for 200 ... 300 was interrupted and only externally an enclosure in this free space is available , ρ-, which made it possible to move up and down. the individual 20 m long pipe sections are stored connected to shifts by expansion sections.

However, it has been found that in this r) Q area through the otherwise open annular gap and

the cuff overlaid from the outside resulted in a protruding edge, which is when conveying lumpy goods and foreign objects such as wooden stamps often lead to blockages. A lining of the stretching shots was not possible, which meant that the spiral lining was also interrupted in this area. Extremely costly and ineffective was in the best case a lining that was built in and on the spot was adapted, a solution which in many cases was only suitable for either elongation or compression.

Of the. The invention is based on the object of those causing the blockages and the coal flow avoid overall obstructive edges in the area of the expansion shot as far as possible.

Surprisingly, this object is achieved by the fact that in spiral chutes of the type mentioned at the beginning for bridging two normal sections in the area of the annular gap on the section above the ring switch Annular gap inside overlapping, the spiral profile further forming wear plates are attached.

The plates are preferably made of a cast iron material with an elongation at break of 2 ... 5%.

The ring sections above the ring gap with jacket wear plates made of steel are expediently higher Strength made.

The ring sections expediently exist below the annular gap made of outer wear plates made of steel of higher strength and then made of a chromium-molybdenum containing cast iron material.

It is advantageous if the expansion joint plates are flush at the top are installed with the rest of the lining in such a way that a perfectly smooth coating is formed.

The expansion joint lining panels are generally reach over or overlap the lower ring section. It is beneficial if they consist of a straight or perpendicular Part in a curve similar to that of the spiral and then merge into a perpendicular piece.

A radial distance or annular space is preferably provided between the expansion section and the lower ring section.

The newly developed lining allows an expansion or compression of - 125 mm when lining the spiral with individual fittings, which is designed such that

it also allows the spiral to be twisted at an angle of up to 100 mm.

In the area of the expansion shot, really free movement from above and below is now achieved. The open one

The annular gap in the area of the expander is covered with the specially designed supports in the zone acted upon by the conveying flow in order to prevent the conveyed material from getting stuck in the open annular gap. IQ comparable blockages of the spiral be avoided.

Exemplary embodiments of the invention will now be described in more detail with reference to the accompanying drawings be explained; these show in

1 shows a section from a blind shaft helix

in the area of the expansion shot; and FIG. 2 shows a section along the line A-A in Tig. I.

The sheet steel jacket 18 of the shaft helix is made of the individual ring sections described above. The "stretch shot" is essentially by the free annular space 16 is formed. Plates 10 hang on the sheet steel structure. These wear plates in the practically still straight areas consist of a steel sheet of higher strength. Outside to avoid that dust or dusty air get out of the shaft helix, the ring sections through a sheet metal jacket (Dehnmanschette) 20 protected against the steel skeleton structure is screwed over flanges. To the annulus below, also to the steel frame construction 18 attached, follow the normal spiral support plates 12, which are made by an additional sheet metal construction 28 are supported. These plates 12 are preferably made of a chromium-molybdenum alloy Cast iron material with high wear resistance.

The annular gap is now according to the invention by hanging Bridged panels that connect with an oblique joint to the panels 10 and against the support structure are screwed. The plates consist of a lor, right Part 22, a thickened concavely curved part 24 and a vertical part 26. These hanging, The plates bridging the annular gap consist of <· ί η am Cast iron material with 5% elongation at break. An annular gap 30 between the overhanging plate and the one below existing plate remains in place. The plate of the lower section is flush with the straight liner plates 10 and the vertical piece 22 of the plate 22/26 and then takes the (flattening) Curvature of the spiral on. The plate belonging to the lower section consists of a chrome-molybdenum alloy Cast iron material. The arrow shows the direction of funding of the good. It is astonishing that the newly developed lining shows an expansion or compression of ± 125 mm is allowed if the spiral is lined with individual fittings as suggested.

The lining is such that it also causes twisting of the spiral is allowed in an angle of up to 100 mm. In the area of the expansion shot is now a really free movement up and down is achieved. Due to the specially designed requirements in the area of the expansion section in the zone acted upon by the flow rate is prevented from being in the can fix the open annular gap conveyed. Blockages in the coil are avoided. Relocations This means that they can be perfectly compensated for in the ground.

Claims (10)

Manhole spiral slide with expansion section PATENT CLAIMS 1. Spiral shaft chutes, especially blind shaft spiral chutes, consisting of end-to-end ■ j ^ q shot with an extended shot to compensate of expansion compensation, characterized in that that to bridge two normal shots in the area of the annular gap (30) on the shot above the Annular gap overlapping the annular gap inside, that , c Spiral profile developing wear plates (22-26) are attached. 2. Manhole spiral chute according to claim 1, characterized in that the wear plates ^{consist of} a cast iron material with 2 ... 5 Z , in particular 3%. 3. Shaft spiral chute according to one of the preceding claims, characterized in that that the ring sections (10) above the annular gap (16). from outer wear plates made of steel higher Strength exist. 4. Manhole spiral chutes according to one of the preceding Claims, characterized in that the ring sections (12) below the annular gap (16) made of outer wear plates made of steel of higher strength and then made of a chrome-molybdenum alloy Cast iron material exist. 5. Chute spiral chute according to one of the preceding Claims, characterized in that that the Dehnschufdplatten (22) flush with the top remaining lining (10) are installed in such a way that a smooth transition is formed. 6. Manhole spiral chute according to one of the preceding claims, characterized in that that the expansion joint plates are chamfered at the joints. 7. Manhole spiral chute according to one of the preceding "LQ claims," characterized in that that the expansion shot plates (22-26) reach over or overlap the lower ring section. 8. Manhole spiral chute according to one of the preceding IQ claims, characterized in that the expansion joint lining panels merge on a straight or vertical part (22) into a curvature (24) similar to the spiral and then into a vertical piece (26). 9. Shaft spiral chute according to one of the preceding Claims, characterized in that the lower ring section is the normal spiral of the Slide trains. 10. spiral chute according to one of the preceding claims, characterized in that that a radial distance or annulus (30) between the expansion section liner plates and the lower annulus is provided.