Vacuum conveying apparatus with a weighing or metering device
A Vacuum conveying apparatus with a weighing and metering device, comprises a separation container ( 10 ), acted on by a vacuum, for intermittent intermediate storage of material conveyed in a suction gas flow, a force isolation means for entry of conveyed material into the separation container (working side), a weighing device ( 50 ) for, in particular, continuous weighing of the separation container, as well as a vacuum pump ( 70 ) and a controller. In order to create a vacuum conveying apparatus that can guarantee a more precise weighing and/or a more accurate stipulation of the timepoint for turning off the vacuum pump or for interrupting the suction process during the ongoing conveyance process, the vacuum pump ( 70 ) is isolated in terms of force from the separation container ( 10 ) and is also situated such that it is not weighed.
1. Vacuum conveying apparatus with a weighing and metering device, said vacuum conveying apparatus comprising:
a separation container ( 10 ), acted on by a vacuum, for intermittent intermediate storage of material conveyed in a suction gas flow,
a weighing device ( 50 ) for weighing of the separation container,
a vacuum pump ( 70 ) and a controller, wherein:
the separation container ( 10 ) is vacuumtight and comprises a vacuumtight discharge device ( 16 );
an entry opening ( 12 A) for entrance of conveyed material into the separation container ( 10 ) is connected in a vacuumtight manner through a first (working side) force isolation means to a suction conduit ( 40 );
an outlet opening ( 14 A) for exit of suction gas from the separation container ( 10 ) is connected in a vacuumtight manner through a second (pure gas side) force isolation means to a vacuum conduit ( 42 );
the vacuum pump ( 70 ) is isolated in terms of force from the separation container ( 10 ) and is also situated such that it is not weighed by the weighing device ( 50 );
the entry and outlet openings ( 12 A, 14 A) point in opposing directions; and,
the first and second force isolation means comprise respective flexible, vacuum-pressure-resistant elements arranged at least approximately coaxially relative to each other.
2. Vacuum conveying apparatus according to claim 1 , further comprising:
an inner holding frame ( 22 ) for a connection with the separation container ( 10 ), and
an outer holding frame ( 24 ), which has holding means ( 28 A, 28 B) for the suction conduit on the working side and for the vacuum conduit on the pure gas side.
3. Vacuum conveying apparatus according to claim 2 , wherein the first and second force isolation means are arranged between the outer holding frame ( 24 ) and the entry and outlet openings ( 12 A; 14 A) to the separation container ( 10 ), respectively.
4. Vacuum conveying apparatus according to claim 2 , wherein the inner and/or outer holding frames ( 22 , 24 ) are designed approximately in a U shape.
5. Vacuum conveying apparatus according to claim 4 , wherein the inner and/or outer holding frames ( 22 , 24 ) are equipped with vertical supports ( 23 , 25 ) that are placed approximately in the center of the U's.
6. Vacuum conveying apparatus according to claim 2 , wherein the weighing device ( 50 ) is located and acts between the outer ( 22 ) and the inner holding frames ( 24 ).
7. Vacuum conveying apparatus according to claim 6 , wherein the weighing device is detachably connected to the outer and/or inner holding frames ( 22 , 24 ).
8. Vacuum conveying apparatus according to claim 1 , further comprising a filter ( 15 ) in the suction gas flow between the working and pure gas sides, wherein a differential pressure resulting from the filter ( 15 ) is compensated by a suitable orientation of the mouth openings ( 12 A, 14 A) with respect to one another, and/or of the separation container ( 10 ) in the weighing frame.
9. Vacuum conveying apparatus according to claim 3 , wherein the inner and/or outer holding frames ( 22 , 24 ) are designed approximately in a U shape.
10. Vacuum conveying apparatus according to claim 3 , wherein the weighing device ( 50 ) is located and acts between the outer ( 22 ) and the inner holding frames ( 24 ).
11. Vacuum conveying apparatus according to claim 4 , wherein the weighing device ( 50 ) is located and acts between the outer ( 22 ) and the inner holding frames ( 24 ).
12. Vacuum conveying apparatus according to claim 5 , wherein the weighing device ( 50 ) is located and acts between the outer ( 22 ) and the inner holding frames ( 24 ).
13. Vacuum conveying apparatus according to claim 2 , further comprising a filter ( 15 ) in the suction gas flow between the working and pure gas sides, wherein a differential pressure resulting from the filter ( 15 ) is compensated by a suitable orientation of the mouth openings ( 12 A, 14 A) with respect to one another, and/or of the separation container ( 10 ) in the weighing frame.
14. Vacuum conveying apparatus according to claim 3 , further comprising a filter ( 15 ) in the suction gas flow between the working and pure gas sides, wherein a differential pressure resulting from the filter ( 15 ) is compensated by a suitable orientation of the mouth openings ( 12 A, 14 A) with respect to one another, and/or of the separation container ( 10 ) in the weighing frame.
15. Vacuum conveying apparatus according to claim 4 , further comprising a filter ( 15 ) in the suction gas flow between the working and pure gas sides, wherein a differential pressure resulting from the filter ( 15 ) is compensated by a suitable orientation of the mouth openings ( 12 A, 14 A) with respect to one another, and/or of the separation container ( 10 ) in the weighing frame.
16. Vacuum conveying apparatus according to claim 5 , further comprising a filter ( 15 ) in the suction gas flow between the working and pure gas sides, wherein a differential pressure resulting from the filter ( 15 ) is compensated by a suitable orientation of the mouth openings ( 12 A, 14 A) with respect to one another, and/or of the separation container ( 10 ) in the weighing frame.
17. Vacuum conveying apparatus according to claim 6 , further comprising a filter ( 15 ) in the suction gas flow between the working and pure gas sides, wherein a differential pressure resulting from the filter ( 15 ) is compensated by a suitable orientation of the mouth openings ( 12 A, 14 A) with respect to one another, and/or of the separation container ( 10 ) in the weighing frame.
18. Vacuum conveying apparatus according to claim 7 , further comprising a filter ( 15 ) in the suction gas flow between the working and pure gas sides, wherein a differential pressure resulting from the filter ( 15 ) is compensated by a suitable orientation of the mouth openings ( 12 A, 14 A) with respect to one another, and/or of the separation container ( 10 ) in the weighing frame.
19. A vacuum conveying apparatus comprising:
a separation container for intermittent intermediate storage of material conveyed in a suction gas flow,
a weighing device for weighing the separation container,
a vacuum pump and a controller, wherein:
the separation container is vacuumtight and comprises a vacuumtight discharge device;
an entry opening in communication with separation container is connected in a vacuumtight manner through a first (working side) force isolator to a suction conduit;
an outlet opening in communication with the separation container is connected in a vacuumtight manner through a second (pure gas side) force isolator to a vacuum conduit;
the vacuum pump is in fluid communication with the vacuum conduit and is physically isolated from the separation container such that it is not weighed by the weighing device; and,
the first and second force isolation means comprise respective flexible, vacuum-pressure-resistant elements arranged at least approximately coaxially relative to each other.