Blowing device for elimination of compactions in bulk material storage silos

• US 4,767,024 A
• Filed: 01/21/1987
• Issued: 08/30/1988
• Est. Priority Date: 01/25/1986
• Status: Expired due to Term

• Current Assignee: VSR Industrietechnik GmbH
• Original Assignee: VSR Engineering GmbH Fördertechnik
• Inventors: Rappen, Albert
• Primary Examiner(s): Rolla, Joseph J.
• Assistant Examiner(s): NOLAND, KENNETH W
• Application Number:
  US07/005,758
• Time in Patent Office: 587 Days
• Field of Search: 222/3, 222/195, 222/4, 222/386, 222/400.7, 285/179, 285/150, 285/153, 285/127, 280/735, 280/736, 280/741, 280/742, 280/737
• US Class Current: 222/3
• CPC Class Codes: B65D 88/703 Air blowing devices, i.e. devices for the sudden introduction of compressed air into the container

Abstract

A blowing device for the elimination of compactions in bulk material storage silos by using air blasts, includes a compressed air storage container, a compressed air supply duct, a compressed air outflow duct and an interposed rapid exit valve. The rapid exit valve has a conduit in which a valve closure is guided whereby the conduit turns into the compressed air supply duct forming an afflux cross-section for the valve piston over a miter cut or tube turn. The afflux cross-section is selected to be significantly greater than the outflow cross-section in the compressed air outflow duct. In this way, the flow losses, and pressure losses, otherwise customary are considerably reduced, so that extremely high flow velocities can be achieved in the compressed air outflow duct until the velocity of sound is reached. The result is a rapid impulse-like discharge of the compressed air storage container and, consequently, faultless elimination of possible compactions.

Claims

1. A blowing device for elimination of the compactions in bulk material in a storage silo using air blasts, comprising a compressed air storage container having a supply duct, a compressed air outflow duct connected to said storage silo and connected to said supply duct, the connection including a valve conduit having one end connected to said compressed air outflow duct and one end of said compressed outflow duct having an arc-shaped end disposed in said valve conduit, a rapid exit valve in said valve conduit, a valve closure member moveable in said valve conduit toward and away from said outflow duct arc-shaped end and being engageable and disengageable with said arc-shaped end to close and open said outflow duct, and said valve conduit forming an afflux cross-section for said valve closure member having a cross-section which is substantially greater than the cross-section of said air outflow duct and which said valve closure member includes a miter cut, said afflux cross-section being approximately twice as large as the cross-section of said outflow duct, said rapid exit valve including a valve seat which is rounded to enhance flow, said outflow duct forming said valve seat and having said arc-shaped end and said outflow duct having a center line lying in the plane of a center line of said supply duct.

2. A blowing device according to claim 1, wherein said supply duct has a center line lying in the plane of said valve seat and said air outflow duct, said air outflow duct and said conduit having coaxial center lines orthogonally to said compressed air supply duct.

3. A blowing device according to claim 1, wherein said comprssed air outflow duct is formed as a tube turn, for example a 90°

tube turn and extends from the plane of said valve seat from said rapid exit valve.

4. A blowing device according to claim 1, wherein said compressed air supply duct has a center line and said air outflow duct has an arc-shaped portion coaxial to said center line.

5. A blowing device according to claim 1, wherein said compressed air supply duct and said conduit are arranged with coaxial center line with respect to each other and said compressed air outflow duct has a tube turn of 90°

from said valve seat.

6. A blowing device according to claim 1, wherein said rapid exit valve has an expansion in a ground transition area of said compressed air supply duct in said conduit opposite the duct end of said compressed air outflow duct which forms said valve seat.

7. A blowing device according to claim 1, wherein said rapid exit valve has a valve housing with an inflow chamber, pipe threads in said inflow chamber for connecting the compressed air supply duct and the compressed air outlet duct.

8. A blowing device for elimination of the compactions in bulk material in a storage silo using air blasts, comprising a compressed air storage container having a supply duct, a compressed air outflow duct to be connected to said storage silo and connected to said supply duct, said connection including a valve conduit having one end connected to said compressed air outflow duct, said valve conduit having an opposite end, said supply duct having an arc-shaped end connected to said valve conduit, a rapid exit valve in said valve conduit, a valve closure member moveable in said valve conduit toward and away from an arc-shaped end of said outflow duct and being engageable and disengageable with said arc-shaped end to close and open said outlet duct, said valve conduit forming an afflux cross-section for said valve closure member and having a flow cross-section which is substantially greater than the flow cross-section of said outflow duct;

a compressed air inlet pipe connected to said opposite end of said valve conduit, and a multi-directional control valve in said compressed air inlet pipe.

9. A blowing device according to claim 8, wherein said compressed air supply is connected to a container socket of said compressed air storage container and including a clamp coupling at the connection.