US 11,999,576 B2Granted

Suction conveying apparatus and method for suction conveying of bulk material

AssigneeCiTEX Holding GmbH

InventorsRalph Klose, Roland Böhm

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Abstract

The present disclosure relates to a pneumatic suction conveying apparatus for conveying granulated bulk materials and a corresponding method, comprising a pump unit with a vacuum pump and a suction volume, at least two suction lines, which is connected to the suction volume and extends towards storage containers for receiving bulk materials, the suction lines each comprising a conveying hopper for separating the bulk material and a stop valve for blocking the suction line. Hereby, in the suction line there is each provided a closed control loop comprising an adjustable throttle valve and a flow sensor provided in the suction line, the control loop being adapted and designed to adjust the throttle valve depending on a measurement of the flow sensor.

Claims17

Dependent claims

A pneumatic suction conveying apparatus for conveying granular bulk materials, the pneumatic suction conveying apparatus comprising

a pump unit including a vacuum pump and a suction volume,
at least two suction lines, which are connected to the suction volume and extend to storage containers for receiving bulk materials,
the suction lines each comprising a rear line leading to the storage containers and a conveying hopper connected to the rear line for separating the bulk material,
wherein each suction line includes a stop valve for blocking the suction line and the conveying hopper are each connected via the stop valve to the pump unit and also to the rear line,
wherein the suction line are each a closed control loop having an adjustable throttle valve provided in the suction line and a flow sensor for measuring a suction speed in the suction line is provided,
the control loop being adapted and designed to adjust the throttle valve depending on the measured suction speed, wherein the throttle valve is adapted to actively adjust a passing cross-section of the suction line.

3 more elements

A method for suction conveying of bulk material from at least two storage containers, comprising the following steps:

generating a negative pressure or vacuum by means of a vacuum pump provided in a pump unit and applying the negative pressure or vacuum to a central suction volume, connected to which are at least two suction lines, each suction line leading from the central suction volume via a closed control loop for regulating a suction speed to a storage container holding bulk material,
guiding the negative pressure or vacuum from the central suction volume through the at least two suction lines to the respective storage container,
aspirating air with taken-up bulk material from the respective storage container and conveying the air and bulk material stream to the respective conveying hopper,
separating the bulk material from the air and bulk material stream into the conveying hopper, and
discharging the transported bulk material,
wherein each closed control loop a suction speed of the suction line is measured and adjusted to a target value by changing a line cross-section of the suction line between the conveying hopper and the central suction volume.

3 more elements

Dependencies are inferred from the claim text.

Facts

Application: 17/867,078Filed 18 Jul 2022
Priority: DE 10 2021 118 548.319 Jul 2021
Published: US 2023/0013229 A119 Jan 2023
Granted: 4 Jun 2024
Term ends: Not estimatedThe source records don’t support an estimate.

Classification4 codes

B65G 53/24
Conveying materials in bulk pneumatically through pipes or tubes; Air slides: gas suction systems
B65G 53/66
Details: use of indicator or control devices, e.g. for controlling gas pressure, for controlling proportions of material and gas, for indicating or…
B65G 2203/025
Relating to the transported articles: speed of the article
B65G
Transport or storage devices

Family

US 2023/0013229 A1Pre-grant publication · published 19 Jan 2023
US 11,999,576 B2This patent

From the US filing history. Foreign family members aren’t listed.

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