Slurry gate valve

• US 4,429,710 A
• Filed: 10/06/1982
• Issued: 02/07/1984
• Est. Priority Date: 02/17/1981
• Status: Expired due to Fees

• Current Assignee: Robert G. Grieves
• Original Assignee: GIW Southern Valve Incorporated
• Inventors: Richter, Roscoe, Grieves, Robert G.
• Primary Examiner(s): CHAMBERS, A MICHAEL
• Application Number:
  US06/433,035
• Time in Patent Office: 489 Days
• Field of Search: 137/375, 137/242, 137/556, 251/285, 251/328, 251/329
• US Class Current: 137/375
• CPC Class Codes: F16K 3/02 with flat sealing faces; Packings therefor
• CPC Class Codes: Y10T 137/4273 Mechanical cleaning
• CPC Class Codes: Y10T 137/7036 Jacketed
• CPC Class Codes: Y10T 137/8275 Indicator element rigidly carried by the movable element whose position is indicated

Abstract

A slurry gate valve is disclosed for controlling the flow of slurry along a pipeline. The gate valve comprises a cylindrical conduit portion and a gate housing portion. The cylindrical conduit portion includes a first and second annular bolt flange defining first and second terminals disposed at opposite ends of the cylindrical conduit portion. A first and a second metallic sleeve liner, respectively, extend inwardly from the bolt flanges and define therebetween a gate receiving slot. The gate housing portion is secured to the cylindrical portion and houses a gate guide track which is in planar alignment with the gate receiving slot. A gate has a lower portion which cooperates with the gate receiving slot in substantially fluid tight relationship therewith. The gate travels from a closed position to an open position wherein the gate substantially fully withdrawn from the conduit portion. The gate valve further includes means for driving the gate between the open and the closed position. In a further embodiment of the invention, the first and the second sleeve liners each include an annular channel and an undercut key portion for the reception of an annular wiping seal permanently formed therein. The wiping seal extends outwardly from the annular channel and sealingly engages adjacent surfaces of the gate to inhibit seepage of the slurry thereby.

Claims

1. A slurry gate valve comprising in combination:

a cylindrical conduit portion;

a first end of said conduit portion;

a second end of said conduit portion, said first and said second ends being in opposed relationship to each other;

a first annular bolt flange disposed adjacent said first end of said conduit portion;

a second annular bolt flange disposed adjacent said second end of said conduit portion;

a first face of said first bolt flange;

a first face of said second bolt flange;

a plurality of bolt holes defined by said first faces of said first and said second bolt flanges;

a first sleeve liner extending from said first face of said first bolt flange inwardly relative to said conduit portion;

a second sleeve liner extending from said first face of said second bolt flange inwardly relative to said conduit portion;

a first inward face of said first sleeve liner;

a first inward face of said second sleeve liner;

an annular slot defined by said first inward faces of said first and said second sleeve liners;

an annular channel defined by said first inward face of said first sleeve liner;

an annular channel defined by said first inward face of said second sleeve liner;

an annular wiping seal disposed within each of said annular channels;

a gate housing portion secured adjacent said conduit portion;

a gate slidably disposed within said gate housing, said gate including a first and a second surface, said annular wiping seal of said first sleeve liner cooperating with said first surface of said gate, said annular wiping seal of said second sleeve liner cooperating with said second surface of said gate in wiping relationship thereto;

a circular slot defined by said conduit portion, said circular slot being enclosed by said gate housing and in planar alignment with said gate and said annular slot; and

an undercut key portion disposed adjacent each of said annular channels.

2. A slurry gate valve as set forth in claim 1 wherein said undercut key portion extends radially outwardly relative to said adjacent annular channel.

3. A slurry gate valve as set forth in claim 2 wherein each of said wiping seals is locked within said adjacent annular channel by said adjacent undercut key portion.

4. A slurry gate valve as set forth in claim 3 wherein said annular wiping seal of said first sleeve portion extends outwardly from said annular channel and sealingly engages said first surface of said gate.

5. A slurry gate valve as set forth in claim 4 wherein said annular wiping seal inhibits seepage of slurry between said first and said second surface of said gate.

6. A slurry gate valve as set forth in claim 5 wherein said annular wiping seal is a resinous sealant.

7. A slurry gate valve as set forth in claim 6 wherein said resinous sealant is a curable polyurethane.