CN2535623Y

CN2535623Y - Hard-sealing slurry gate valve

Info

Publication number: CN2535623Y
Application number: CN 02219371
Authority: CN
Inventors: 吴启春
Original assignee: Individual
Current assignee: Individual
Priority date: 2002-03-18
Filing date: 2002-03-18
Publication date: 2003-02-12
Anticipated expiration: 2012-03-18

Abstract

The utility model relates to the technical field of an improvement of mud valve structures, discloses a hard sealing mud gate valve which is characterized in that a sealing surface between a flash-board and a valve seat is spray welded with a layer of hard alloy, and a valve rod adopts the fluoroelastomer filling material. The utility model has the advantages that using the hard alloy sealing surface, the valve is wearable, anticorrosion and washable with small frictional factor, further the utility model has good hermetization effect, small opening torque and long service life. The utility model can be extensively used as the main control element for oil, natural gas and mud pipe manifold, further the utility model can be used as the complement production of anti-blowout well-control system for well drillings.

Description

Hard sealing slurry gate valve

Technical field

The utility model belongs to the common engineering element---and the valve class relates to mud gate valve architecture advances technical field.

Technical background

In the line transportation of oil, rock gas, mud, need control with mud valve.At present, it is many that mud valve often adopts Outside screw stem rising through handwheel type gate valve, is a kind of Outside screw stem rising through handwheel type gate valve that adopts rubber and metallic seal as Z23X100-35, and promptly sealing surface of seat is a nitrile rubber, the nickel-phosphorus composite deposit that flashboard surface coverage one deck is 0.05～0.15 millimeter, valve stem packing adopts rubber seal.This mud gate valve corrosion resistance is poor, seals badly, and working life is short.

Summary of the invention

The technical problems to be solved in the utility model is for overcoming the existing problem of above-mentioned mud gate valve, and has proposed a kind of hard sealing slurry gate valve.It mainly is made up of valve body, flashboard, valve seat, valve gap, valve rod, filler, support, bearing, Stem Mut, handle, valve bonnet and fastening piece.Sealing surface has adopted the hard sealing surface of metal to replace the rubber and the metallic sealing section of former valve between valve plate and the valve seat, promptly uses the hard alloy layer as nickel-base alloy powder and so on wear-and corrosion-resistant material surfacing 0.8～1.5 millimeters thick on the sealing surface of flashboard and valve seat.Valve stem packing adopts fluorine rubber to replace former gum filler simultaneously.

The utility model advantage is owing to adopted the flap type technology, the sealing surfaces surfacing hard alloy layer, make it to have good wear resistance and anti-corrosion capacity, and friction factor washes away for a short time, anti-, good sealing effect, it is little to open moment, prolongs 3～5 times working life.Because valve stem seal adopts fluorine rubber filler and flashboard, valve seat to adopt the nickel-base alloy sealing material, makes this product have the performance of anti-high concentration H2S corrosion.Can be used as the major control element and be widely used in mud line manifold, also can be used as the auxiliary products of well drilling blowout prevention killing well system, also can according to circumstances use separately.

Description of drawings

Fig. 1 is the hard sealing slurry gate valve structure of a utility model schematic representation.

Fig. 2 is the structural representation of valve seat (3).

Fig. 3 is the structural representation of flashboard (2).

Fig. 4 is the structure cross-sectional schematic of flashboard (2).

In Fig. 1,1-valve body; 2-flashboard, two sealing surfaces respectively have the hard alloy layer of one deck with the nickel-base alloy powder surfacing, thick 0.8～1.5 millimeter; 3 one valve seats have two symplex structures, and one side is a sealing surface, and sealing surfaces has the hard alloy layer of one deck with the nickel-base alloy powder surfacing, thick 0.8～1.5 millimeter; 4-valve gap; 5-valve rod; 6-filler, fluorine rubber; 7-support; 8-bearing; 9-Stem Mut; 10-handle; 11-valve bonnet.

In Fig. 2, there is the hard alloy layer of one deck with the nickel-base alloy powder surfacing on the left side, and thickness is 0.8～1.5 millimeter.

In Fig. 4, the hard alloy layer of one deck with the nickel-base alloy powder surfacing all arranged on the left and right sides sealing surface of flashboard (2), thickness is 0.8～1.5 millimeter.

Embodiment

1, elder generation is with sealing surface surfacing one deck hard alloy layer of flashboard (2) and valve seat (3);

2, go into appropriate location in the valve body (1) with valve seat (3) two is packaged;

3, valve rod (5) is packed in the valve gap (4), in valve gap (4), load onto fluorine rubber (6) then and make filler;

4, load onto bearing (8) in valve rod (5) upper end;

5, load onto Stem Mut (9) in valve rod (5) upper end, cover upper bracket (7) is also fastening with valve gap (4) and support (7) with fastening piece (bolt);

6, valve rod (5) is buckled well flashboard (2);

7, the above-mentioned valve gap (4) that installs valve rod (5) is connected with valve body (1), in the middle of two valve seats (3) that flashboard (2) sent into be contained in the valve body (1), valve gap (4) and valve body (1) is fastening with fastening piece (bolt);

8, handle (10) is loaded onto;

9, dress valve bonnet (11) is loaded onto.

Claims

1, a kind of hard sealing slurry gate valve, it is made up of valve body (1), flashboard (2), valve seat (3), valve gap (4), valve rod (5), filler (6), support (7), bearing (8), Stem Mut (9), handle (10), valve bonnet (11) and fastening piece, it is characterized in that sealing surfaces has adopted the metal hard-sealing face between flashboard (2) and the valve seat (3), filler (6) adopts fluorine rubber.

2,, it is characterized in that sealing surfaces surfacing one deck cemented carbide of flashboard (2) and valve seat (3), 0.8～1.5 millimeter of thickness according to the described hard sealing slurry gate valve of claim 1.

3,, it is characterized in that the raw material of cemented carbide of the sealing surfaces surfacing of flashboard (2) and valve seat (3) is a nickel-base alloy powder according to claim 1 or 2 described hard sealing slurry gate valves.