Conveyors: fluid current – Conduit
Patent
1989-12-21
1991-05-21
Forcarino, Margaret A.
Conveyors: fluid current
Conduit
406 10, 406 12, 138 26, 138 31, 138155, 285114, 285 93, B65G 5352, B65G 5366
Patent
active
050170546
DESCRIPTION:
BRIEF SUMMARY
BACKGROUND OF THE INVENTION
The present invention relates to a delivery line for conveying viscous or pasty material which is to be filled into a food can or the like from a conveyer pump to a filling machine.
In the case of viscous or pasty materials which are to be filled into food cans or the like, the problem arises that variations in the pressure in the delivery line which result in variations in the delivery capacity and/or the filling capacity considerably impair the filling process.
OBJECTS OF THE INVENTION
The object of the invention is to make the pressure in the delivery line uniform.
SUMMARY OF THE INVENTION
In accordance with the invention, this object is achieved by a path developed in the form of a trombone tube having two sections, which extend parallel to each other, and a U-shaped arch, the legs of which cooperate telescopically with the sections. Means are also provided which act on the U-shaped arch in the direction towards shortening of the path against the pressure of the material being conveyed.
In a preferred embodiment the means which act on the U-shaped arch is formed by a pneumatic or hydraulic cylinder/piston unit.
Furthermore, means for detecting the instantaneous length of the path can be provided. One particular preferred embodiment is characterized by the path extending in a vertical plane and being provided with a vent device at the highest point of the U-shaped arch.
BRIEF DESCRIPTION OF THE DRAWINGS
Further features and advantages of the invention will become evident from the following description in which one embodiment of the invention is explained with reference to the drawing, in which:
FIG. 1 is an overall view of the delivery line;
FIG. 2 is a view of the path in retracted condition; and
FIG. 3 is a view of the path in extended condition.
DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENT
A delivery line which connects a delivery pump 22 with a filling machine 24 is provided with a path 10 which is formed by two parallelly extending straight sections 12, 14 and a U-shaped arch 16. The legs of the U-shaped arch 16 are telescopically displaceable in the straight sections 12, 14. The path 10 has a hydraulic or pneumatic cylinder/piston unit 28 which acts on flanges 26 attached to the arch 16 and exerts a force on the arch 16 which retracts the legs thereof into the straight sections 14, 16 of the path 10. The path 10 is also provided with a sensing means 18 which extends parallel to the piston/cylinder unit 28 and detects the instantaneous length of the path 10.
The path 10 maintains the pressure in the delivery line uniform. When the output of the delivery pump 22 exceeds the filling capacity of the filling machine 24, the pressure in the delivery line increases. This has the result of moving the U-shaped arch 16 against the force of the cylinder/piston unit out of the straight sections 12, 14 of the path 10 to lengthen the path 10. When this takes place the lengthening of the path 10 permits the pressure in the delivery line to drop. When the pressure in the delivery line, on the other hand, decreases, due to a reduction in the pump output, the U-shaped arch 16 will move back into the straight sections 12, 14 of the path 10 due to the force exerted by the piston/cylinder unit 28. This results in a shortening of the length of the path 10 and thus increases the pressure in the delivery line. The continuous adaptation of the length of the path 10 to the corresponding delivery pressure therefore results in maintaining the delivery pressure uniform.
The sensing means 18 for detecting the instantaneous length of the path, provided in a preferred embodiment, makes it possible to regulate the delivery output in such a manner that, in its normal position, the path 10 assumes a position between the position shown in FIG. 2 of minimal length and the position shown in FIG. 3 with maximum length so that positive and negative pressure variations which occur can be continuously counteracted.
FIGS. 2 and 3 additionally show that in the event of a lengthening of the path 1
Gideon Jurgen
Krieger Dieter
Mengel Erich
EFFEM GmbH
Forcarino Margaret A.
Kannofsky James M.
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