SLIDE VALVE FOR A HOPPER CONTAINING POWDERED MATERIAL OR MATERIAL WITH A SMALL GRAIN SIZE

• US 20160236861A1
• Filed: 09/26/2014
• Published: 08/18/2016
• Est. Priority Date: 10/02/2013
• Status: Active Grant

• Current Assignee: Wamgroup S.P.A.
• Original Assignee: Wamgroup S.P.A.
• Inventors: MARCHESINI, Vainer
• Granted Patent: US 9,809,382 B2
• Time in Patent Office: Days
• US Class Current: 1/1
• CPC Class Codes: B65D 2590/542 special sealing means or means for improving sealing
• CPC Class Codes: B65D 90/587 having a linear motion
• CPC Class Codes: F16K 3/0227 Packings
• CPC Class Codes: F16K 3/0281 Guillotine or blade-type valves, e.g. no passage through the valve member
• CPC Class Codes: F16K 3/205 by means of cams

Abstract

A slide valve for a powdered material or a material with a small grain size. The valve comprises a stiff frame, which defines a discharge mouth to discharge the material, and a shutter of the discharge mouth, which is activated by respective moving organs. The valve is characterised in that it comprises a height adjusting device for a sealing element. The height adjusting device is suited to compensate the loss of sealing effect between the lower face of the sealing element and an upper surface of the shutter. The loss of sealing power is due to the wear generated by the relative friction between the lower face and the surface.

Claims

1. A slide valve (101) for a powdered material or a material with a small grain size;

said valve comprising a stiff frame (10), which defines a discharge mouth (OP) to discharge the material, and a shutter (40), which is activated by respective moving organs (45), said shutter (40) being mobile and having an extension that is such as to shut, in plan view, said discharge mouth (OP);

said valve being characterised in that it comprises, furthermore, a height adjusting device (20) for a sealing element (30), said height adjusting device (20) being suited to compensate the loss of sealing effect between the lower face (80) of said sealing element (30) and an upper face (40A) of said shutter (40), said loss of sealing power being due to the wear generated by the relative friction between said lower face (80) of said sealing element (30) and said upper face (40A) of said shutter (40).

2. A slide valve (100), according to claim 1, characterised in that said adjusting device (20) comprises a first element (21;

22), which is coupled to a second element (221;

21);

a substantially horizontal movement of said first element (21;

22) turning into a substantially vertical movement of said second element (22;

21), which, in turn, acts on said sealing element (30) so as to restore the sealing effect desired.

3. A slide valve (100), according to claim 1, characterised in that on the lower face (80) of said sealing element (30) there is at least one contact point between said lower face (80) and said upper surface (40A) of said shutter (40), said at least one contact point (83) being due to the local deformation of said lower face (80) substantially in correspondence to said adjusting device (20).

4. A slide valve (100), according to claim 1, characterised in that between said lower face (80) and said upper surface (40A) of said shutter (40) there are two further contact points (81, 82).

5. A slide valve (100), according to claim 1, characterised in that said adjusting device (20) comprises a first batten (21) lying on a second batten (22) by means of a “

saw-toothed”

coupling (23).

6. A slide valve (100), according to claim 1, characterised in that said sealing element (30) comprises an upper portion (30A), which is substantially above the adjusting device (20), and a lower portion (30B), which is substantially arranged next to and under the adjusting device (20).

7. A slide valve (100), according to claim 6, characterised in that said upper portion (30A) of said sealing element (30) lies on a support element (50), which comprises, in turn, a horizontal plate (50A) having an end that is provided with a vertical abutment (50B) extending downwards;

on the upper surface of said horizontal plate (50A) there being provided a longitudinal recess (60), which is sited to house a projecting element (30A*), which protrudes from said upper portion (30A) of said sealing element (30);

the coupling between said projecting element (30A*) and said longitudinal recess (60) representing a first anchoring area (AZ1) to anchor said sealing element (30) to said support element (50).

8. A slide valve (100), according to claim 7, characterised in that a second anchoring area (AZ2) to anchor said sealing element (30) to said support element (50) consists in the coupling of a bend (30B*) of said sealing element (30) to said vertical abutment (50B).

9. A slide valve (100), according to claim 7, characterised in that between said vertical abutment (50B) and said lower portion (30B) of said sealing element (30) there is defined a cavity (25), which houses said adjusting device (20).

10. A slide valve (100), according to claim 1, characterised in that a further lower sealing element (90), which is advantageously shaped like said sealing element (30) or is similar thereto, acts upon the lower surface (40B) of said shutter (40).