Apparatus for conveying bulk material with vacuum-responsive controlled introduction of a conveying gas
First Claim
1. An apparatus that conveys bulk material, comprising a conveying line, a vacuum pump for drawing a negative pressure in the conveying line, a conveyor gas inlet for introducing a conveying gas into the conveying line, a pressure sensor that measures the negative pressure in said conveying line, a valve responsive to the measured pressure for regulating the introduction of the conveying gas through said conveyor gas inlet, and a controller for controlling the valve based on a pressure signal from the pressure sensor.
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Accused Products
Abstract
An apparatus for conveying bulk material in which a variable amount of a conveying gas may be introduced to the bulk material to be conveyed by a negative pressure of a vacuum conveying system. In a conveying line (4) for the bulk material being transported by the vacuum conveying system while adding the conveying gas, the negative pressure is measured by a pressure sensor (7), and a corresponding control signal is output. In a conveying gas inlet (3) of the vacuum conveying system, a valve (9) is installed whose opening for the flowing conveying gas is controlled by a controller (8) as a function of the magnitude of the negative pressure within the conveying line (4).
60 Citations
13 Claims
- 1. An apparatus that conveys bulk material, comprising a conveying line, a vacuum pump for drawing a negative pressure in the conveying line, a conveyor gas inlet for introducing a conveying gas into the conveying line, a pressure sensor that measures the negative pressure in said conveying line, a valve responsive to the measured pressure for regulating the introduction of the conveying gas through said conveyor gas inlet, and a controller for controlling the valve based on a pressure signal from the pressure sensor.
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11. A method of conveying bulk material comprising the steps of conveying bulk material through a conveying line by a negative pressure of a vacuum pump;
- introducing a conveying gas through an inlet into the conveyed bulk material;
sensing the negative pressure in said conveying line using a pressure sensor disposed in said conveying line, and regulating the introduction of conveying gas through said inlet into the bulk material in response to the sensed pressure to maintain the negative pressure in the conveying line within a target pressure range for conveying the bulk material. - View Dependent Claims (12, 13)
- introducing a conveying gas through an inlet into the conveyed bulk material;
Specification