DE483774C - Transition piece for connecting flushing pipes made of reinforced concrete to those made of iron or vice versa - Google Patents

Description

Transition piece for transferring flushing offset pipes made of reinforced concrete to those made of iron or vice versa. Mining has recently begun to use it Instead of the ones that are very expensive to purchase and because of their limited lifespan Iron flushing pipes made of concrete or Use reinforced concrete. The reinforced concrete pipes come because of their greater wall thickness, the higher weight and the resulting reduced handiness, but also because of their greater resistance to wear and tear and their longer service life mainly for the long and heavily stressed rear pipe strings into consideration, while for the pipelines closer to the dismantling, which often only lie for a short time, iron lines are still being taken. It is Also to take into account that they were replaced by reinforced concrete pipes for reasons of economy rear strands on some pits further forward than end strands for years and pouring lines can be used ..

The opposite is true when laying reinforced concrete pipes always start at the flushing funnels. Sometimes the manhole pipes remain exist temporarily in iron, and only the subsequent cross-passages etc. Lines made in reinforced concrete. For this reason there will always be transition points from concrete pipes to iron pipes and vice versa. At the crossing points Concrete pipe sections must be used in which iron connection pieces are concreted are. Since the concrete pipe due to its great resistance and the large Wall thickness has a very long service life, so that the transition piece does not have to has to be replaced too often, a particularly hard iron material, preferably cast steel, be taken. Over time, however, the concrete works its way in front of or behind the steel casting (depending on the direction of flow). This would reduce or decrease over time Eddy currents are created, which inhibits the smooth flow through the transition point and uneven wear or clogging can result. It must therefore for a smooth flow even when more or less worn Concrete to be taken care of.

There is still a difference to be made whether the pipes are concrete acts with a centric or eccentric flow cross-section. With centrally located As a rule, things are easier through the flow opening. With an eccentric The flow opening initially finds a deflection when the pipes are not yet worn the purge flow from the flow axis instead of. When transitioning from the iron to the concrete pipe would therefore have the flushing flow at the top of the pipe hit the concrete wall exactly where it is initially weakest, and possibly grind them here prematurely up to the reinforced outer cut. This one Particular inconveniences must be prevented with an eccentric flow opening will.

In the case of transition pieces with a centrally located flow opening, should now the symmetrical transition piece shown in the drawing can be used (gbb. i). The same is characterized in that a final piece made of concrete conical insert, preferably made of cast steel, is set in concrete. The cast steel cone is provided with a series of holes to make a good connection with the concrete to achieve. If now the concrete pipe on the inside (possibly with repeated Turning on all sides) wears out, but remains due to the conical transition a smooth flow guaranteed in one direction or the other.

If the flow opening is located eccentrically in the reinforced concrete pipe the steel casting get a more bottle neck-like shape. To the wear and tear to prevent the weakest point of the concrete pipe from impacting the wash ware, should at this point a more or less wide casing segment made of cast steel o. Like. Be concreted in (Fig. 2).

If the concrete of the transition piece is completely over the years is worn out, the steel or cast iron inserts can be knocked out and rammed into them using the same concrete end pieces.

Claims (2)

PATENT CLAIMS. i. Transition piece for transferring flushing offset lines from reinforced concrete according to patent 479,000 to those made from iron or vice versa, thereby marked that in the concrete end piece a conical connection piece made of iron (cast steel, Cast iron or the like) is concreted in. 2. Transition piece according to claim i, but for Reinforced concrete pipes with an eccentrically located flow opening, characterized in that that the latter is followed by a jacket segment made of iron (cast steel, cast iron or the like) is concreted into the conical transition piece.