Disk valve with improved disk mounting

• US 5,305,787 A
• Filed: 02/03/1993
• Issued: 04/26/1994
• Est. Priority Date: 02/03/1993
• Status: Expired due to Term

• Current Assignee: Weir Valves & Controls USA, Inc. (WEIR Group PLC)
• Original Assignee: C & S Valve Company
• Inventors: Thygesen, Theodore E.
• Primary Examiner(s): Nilson, Robert G.
• Application Number:
  US08/013,057
• Time in Patent Office: 447 Days
• Field of Search: 137/556, 137/527, 137/527.8, 137/554
• US Class Current: 137/527
• CPC Class Codes: F16K 15/033 spring-loaded
• CPC Class Codes: F16K 37/0008 Mechanical means F16K37/0075 takes precedence
• CPC Class Codes: F16K 37/0041 for measuring valve parameters F16K37/0033 takes precedence
• CPC Class Codes: Y10T 137/7898 Pivoted valves
• CPC Class Codes: Y10T 137/8242 Electrical
• CPC Class Codes: Y10T 137/8275 Indicator element rigidly carried by the movable element whose position is indicated

Abstract

An eccentric disk valve has return springs and indicators located outside of the valve housing. The valve disk is directly seated on the housing and the valve seat of the housing is described as a section of a right circular cone whose central axis is aligned with the axis of flow through the valve housing.

Claims

1. A valve assembly, comprising:

a housing defining a tubular flow passageway extending along a flow axis;

a reference plane extending through said housing, perpendicular to the flow axis;

a valve disk having attachment means for attaching to a pivot shaft;

a double-ended pivot shaft extending through said housing with end portions lying outside said housing, said pivot shaft connected to said attachment means for mounting said valve disk for pivoting within said housing between closed and open positions, with said valve disk lying in a seal plane when in said closed position;

said housing including a valve seat engaging said valve disk in said closed position so as to seal said flow passageway and so as to orient the seal plane at an acute angle to the flow axis; and

spring bias means mounted on at least one of said pivot shaft end portions, outside of said housing for biasing said valve disk toward one of said closed and said open positions.

2. The valve assembly of claim 1 wherein said housing and valve seat are of one-piece, monolithic construction.

3. The valve assembly of claim 1, further comprising indicator means mounted on at least one of said pivot shaft end portions, outside of said housing so as to indicate the position of the valve disk.

4. The valve assembly of claim 3 wherein said indicator means comprises an indicator flag fixedly mounted to said pivot shaft.

5. The valve assembly of claim 3 wherein said indicator means comprises an indicating circuit means for sending a signal to an external circuit indicating position of the valve disk.

6. The valve assembly of claim 4 wherein said spring bias means comprises a coil spring having a first end mounted to said indicator flag and a second end attached to said housing.

7. The valve assembly of claim 1 wherein said spring bias means comprises a coil spring having a first end mounted on one of said pivot shaft end portions, and a second end attached to said housing.

8. The valve assembly of claim 1 wherein said pivot shaft extends through an opening defined by said housing, and said valve assembly further comprises a gasket adjacent said opening so as to seal said pivot shaft with respect to said housing.

9. The valve assembly of claim 8 further comprising an end cap removably mounted to said housing adjacent said opening and cooperating with said housing so as to retain the gasket in place, between said pivot shaft and said housing.

10. The valve assembly of claim 1 wherein said pivot shaft extends through an opening defined by said housing, and said valve assembly further comprises a bearing received in said opening, between said pivot shaft and said housing.

11. The valve assembly of claim 10 further comprising an end cap removably mounted to said housing adjacent said opening and cooperating with said housing so as to retain the bearing in place, between said pivot shaft and said housing.

12. A valve assembly, comprising:

a housing defining a tubular flow passageway extending along a flow axis;

a reference plane extending through said housing, perpendicular to the flow axis;

a valve disk having attachment means for attaching to a pivot shaft;

a pivot shaft supported by said housing and connected to said attachment means for mounting said valve disk for pivoting within said housing between closed and open positions, with said valve disk lying in a seal plane when in said closed position;

said housing including a valve seat engaging said valve disk in said closed position so as to seal said flow passageway and so as to orient the seal plane at an acute angle to the flow axis, said valve seat comprising a section of a right circular cone whose central axis is aligned with the flow axis.

13. The valve assembly of claim 12 wherein said housing and valve seat are of one-piece, monolithic construction.

14. The valve assembly of claim 12 wherein said seal plane forms an angle with the flow axis ranging between 15 degrees and 35 degrees.

15. The valve assembly of claim 12 wherein said attachment means comprises a shoulder extending from said valve disk, centrally located between said ends of said pivot shaft and defining a bore through which said pivot shaft extends.

16. A valve assembly, comprising:

a housing defining a tubular flow passageway extending along a generally horizontally extending flow axis;

a generally vertically extending reference plane extending through said housing, perpendicular to the flow axis;

a valve disk having attachment means for attaching to a pivot shaft and a center, with a valve disk centerline passing through the center, generally perpendicular to the valve disk;

a pivot shaft extending generally horizontally through said housing and connected to said attachment means for mounting said valve disk for pivoting within said housing between closed and open positions, with said valve disk lying in a seal plane when in said closed position;

said housing including a valve seat integrally formed therewith engaging said valve disk in said closed position so as to seal said flow passageway and so as to orient the seal plane at an acute angle to the reference plane ranging between 15 degrees and 35 degrees, said housing and valve seat being of one-piece, monolithic construction

said attachment means and said pivot shaft are located to one side of the flow axis, adjacent a portion of the valve disk which is moved toward and away from the flow axis as the valve disk is moved to open and closed positions, respectively;

said attachment means and said pivot shaft are located to one side of the seal plane; and

said valve disk centerline is spaced below the intersection of said seal plane and a generally horizontal plane passing through the flow axis.

17. The valve assembly of claim 16 wherein said valve disk has generally unequal portions extending above and below a horizontal plane passing through the flow axis so that a center of gravity of the valve disk is located substantially below said pivot shaft.

18. The valve assembly of claim 16 wherein said attachment means comprises a shoulder extending from said valve disk, centrally located between said ends of said pivot shaft and defining a bore through which said pivot shaft extends.