Fluid handling – With leakage or drip collecting
Patent
1998-05-12
2000-07-18
Chambers, A. Michael
Fluid handling
With leakage or drip collecting
137363, 73 40, 73 46, 73 492, 73 37, F16K 2300
Patent
active
060892544
DESCRIPTION:
BRIEF SUMMARY
The invention relates to a sewage structure, particularly one constructed as a drain, inspection shaft or the like.
BACKGROUND OF THE INVENTION
A sewage structure, known from U.S. Pat. No. 4,373,381 has several hollow concrete parts, the part, which is the upper part in the installed position, accommodating in its test position an air sac as test seal. In this installed position, the test seal is connected over a chain with a sprocket part of the structure. In the pressureless position during the installation of the air sac, the whole of the test device can be shifted into an unwanted inclined position in the hollow concrete part and, under test conditions, with simultaneous action of the test pressure in the interior of the shaft, the danger exists that the test device will become detached in the region of the air sac lying against the wall and, with that, the operating personnel will be exposed to danger.
SUMMARY OF THE INVENTION
It is an object of the invention to provide a sewage structure, the leakproofness of which can be checked rapidly and in an uncomplicated manner with little technical effort for the region of the structure itself, as well as for the region of the sewage pipes, which are connected in each case, the safety requirements being fulfilled at the same time, even when the testing pressures are high.
With the integral contacting form region, the sewage structure, constructed pursuant to the invention, makes possible a defined positioning of the test seal of a testing device in a fluid-tight test position, which makes comprehensive testing possible in one testing process. This decreases the costs of the testing, particularly in the case of an unfinished new construction. With the fixing of the test seal and/or of parts of the testing device over holding regions in the sewage structure, the reliability of the testing is increased.
With respect to important, further advantages and details of the invention, reference is made to the following description and the drawing, in which several embodiments of sewage structures with an inventive contacting profile form are illustrated in greater detail.
IN THE DRAWINGS
FIG. 1 shows a sectional representation of an inlet box with a contacting form region,
FIG. 2 shows a sectional representation of an accessible sewage shaft,
FIG. 3 shows a sectional representation of a delivery shaft,
FIG. 4 shows a sectional representation of a dome shaft
FIG. 5 shows a sectional representation of the inlet box, similar to that of FIG. 1, with an internal pipe as contacting form region,
FIG. 6 shows a plan view of the inlet box of FIG. 5,
FIG. 7 shows a sectional representation of the inlet box, similar to that of FIG. 5, with a modified upper inlet region, and
FIG. 8 shows a plan view of the inlet box of FIG. 7 with an inlet grating.
DESCRIPTION OF THE PREFERRED EMBODIMENTS
In FIG. 1, a first embodiment of a sewage structure is shown, which is labeled 1 as a whole and forms a drain part 2, for example, for stormwater drains for street and yard or the like. In a lower base region 3, the drain part 2 has a discharging canal 5, in which a collecting canal 4 ends and to which a sewage pipe 7 can be connected in the region of a connecting sleeve 6.
The drain 2 is constructed in one piece as a hollow concrete part and, in the lower part of the inner wall 8 of the collecting canal 4, has a contacting form region 9, which is constructed as a cross sectional narrowing and in which the test seal 10 can be supported in a testing device 11, the details of which are not shown, in a fluid-tight test position (FIG. 1).
To carry out the leakproofness test, the collecting canal 4 is closed off from the surroundings in the seal-accommodating area in such a manner, that a test pressure can be built up in the connecting canal 5 with the help of a pressure medium, such as air or water, and it is possible to establish in a single testing process whether the pipe connection is tight in the region of the connecting sleeve 6, that is, whether the seal 12 seals the connecting sur
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Chambers A. Michael
McShane Thomas L.
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