Fluid handling – Systems – Flow path with serial valves and/or closures
Patent
1987-01-28
1988-05-24
Cohan, Alan
Fluid handling
Systems
Flow path with serial valves and/or closures
137488, F16K 2100
Patent
active
047459468
DESCRIPTION:
BRIEF SUMMARY
The invention refers to a pipe separator according to the preamble of claim 1.
A pipe separator of this kind is known from the DE-OS No. 32 47 325.
It is the object of the invention to provide a pipe separator of the above mentioned kind which is improved with regard to the known type. In particular it shall have less switching oscillations.
This object is achieved by a pipe separator of the above mentioned kind which is, according to the invention, characterized by the features of the characterizing part of claim 1.
Further features and advantages of the invention will stand out from the description of an embodiment in connection with the Figures. In the Figures:
FIG. 1 is a sectional view through a pipe separator according to the invention in a first position;
FIG. 2 shows the pipe separator of FIG. 1 in a second position;
FIG. 3 is an enlarged representation of the valve used in the pipe separator shown in the FIGS. 1 and 2, the valve being in a first position;
FIG. 4 shows the valve of FIG. 3 in a second position;
FIG. 5 is an enlarged representation of a part of the valve shown in FIG. 4; and
FIG. 6 shows a third switching position of the pipe separator.
The pipe or tube separator 1 comprises an inlet 2 adapted to be connected with a pipe and an outlet 3 adapted to be connected with a pipe. A sliding valve 4 having a connecting canal 5 is provided between the inlet 2 and the outlet 3. As may be seen from FIG. 1, the sliding valve connects the inlet 2 with the outlet 3 in the shown position thereof, whereas it disconnects the inlet and the outlet from each other in a not shown second position in which it is displaced in a direction transversely to the connecting canal. One end of the sliding valve 4 extends into a cylinder 6 wherein it may slide back and forth in the form of a piston in dependence on the pressure prevailing within the cylinder.
The interior of the cylinder 6 may be connected with the inlet 2 through a control valve 7 and a connecting conduit 8. The control valve 7 comprises a valve chamber with a first portion 9 and a second portion 10. The inlet of the first portion 9 is connected with the connecting conduit 8 forming the first inlet of the control valve and the outlet of the first portion is connected with the second portion 10. The second portion is formed as a bore having its end remote from the first portion opening into a bore 11 of the sliding valve 4. This bore 11 leads through an outlet bore 12 into the open air or a chamber, respectively, which is acted upon by the ambient pressure or at least a pressure which is less than the pressure prevailing at the inlet 2 in presence of a flow medium.
The second portion 10 is connected with the interior of the cylinder 6 through cross holes 13. It comprises valve seats 15, 16 at the end thereof facing the first portion as well as at the end thereof facing the bore 11. A valve stem 17 is provided passing through the second portion and having a valve body 18 at the end thereof remote from the first portion and a second valve body 19 in a distance from the first valve body, the distance being greater than the distance between the two valve seats 15, 16. As may be seen from FIG. 1, the surface area of the second valve body 19 facing the first portion is larger than the area of the first valve body 18 acted upon by the second portion.
The wall of the first portion 9 which is opposite to the second portion 10 is formed by a diaphragm 21 which has the edge thereof firmly clamped by means of a control valve housing 20. The valve stem 17 is extended through the first portion such that, passing through the diaphragm 21, it is rigidly connected with an abutment plate 22 and with the diaphragm 21 itself. On that side of the diaphragm which is turned away from the valve chamber, the control valve housing 20 forms a chamber 23 which is defined by an abutment 24 on the side remote from the diaphragm. A compression spring 25 biassing the diaphragm and thus the valve body into the second position through the abutment plate is disposed between the abutme
Brown Donald
Cohan Alan
Gammons Robert T.
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