CN2201531Y

CN2201531Y - Full corrosion-resistant butt-clamping butterfly bamper

Info

Publication number: CN2201531Y
Application number: CN 94219467
Authority: CN
Inventors: 刘昌岭
Original assignee: Individual
Current assignee: Individual
Priority date: 1994-09-11
Filing date: 1994-09-11
Publication date: 1995-06-21
Anticipated expiration: 2004-09-11

Abstract

The utility model relates to a full corrosion-resistant butt-clamping butterfly valve which belongs to the field of butterfly valves. The utility model is composed of an upper valve body and a lower valve body in a semicircular shape, a valve seat with an inner hole clamp and a reinforcing pad in which a butterfly plate is arranged, and the circumference is a spherical surface. The middle division surface of the valve seat is provided with a concave spherical slot engaged with the butterfly plate. The connection portion of a valve rod and the valve bodies is provided with a convex neck, and axial and radial sealing are formed. The utility model has the advantages of simple structure, good sealing performance, small operation torque and long service life. The flow property tends to a straight line, and metal components do not contact with conveyed medium. The utility model can be used for a petroleum industry, a chemical industry, a medicine industry, a food product industry, a metallurgy industry, etc., and liquid and gas with strong corrosiveness and the medium without granule can be conveyed.

Description

Full corrosion-resistant butt-clamping butterfly bamper

Complete anticorrosion wafer type butterfly valve belongs to the butterfly valve class in the valve products.

The anti-corrosion material lining wafer type butterfly valve that has that prior art provided has following deficiency: 1. adopt axial seal, promptly valve seat and butterfly plate are realized sealing with the sealing retaining, and the block skeleton generally adopts F ₄Make, and F ₄Manufacturability is poor, and matter is crisp, and magnitude of interference is big during because of assembling, easy especially squeeze crack, and the rubber ring that plays the elastic packing effect is easily aging, easily loses sealability; 2. the circumferential sealing face is very narrow between valve seat through-hole and the butterfly plate, about 1--1.5mm, F ₄Plastics are very crisp, and are easily crowded bad during assembling, only 3--6 month working life; 3. between vertical valve rod plane and the circumference a little transitional surface is arranged on the butterfly plate, magnitude of interference is too big, causes open and close torque big, even stuck.Sealability is low, poor reliability, and working life is extremely short.

The objective of the invention is to overcome above-mentioned butterfly valve deficiency, a kind of employing radial seal is provided, valve seat and butterfly plate circumference are ball face sealing, and the keying resistance is little, good seal, the complete anticorrosion wafer type butterfly valve that the life-span is long.

The technical characterstic of this complete anticorrosion wafer type butterfly valve is complete anticorrosion valve seat to be arranged, valve rod and butterfly plate F ₄The complete cylinder-packing of plastics, butterfly plate circumference are sphere, between valve rod hole and valve rod, the afterburning ring of lining and sealing is arranged, thereby formation are anticorrosion entirely, make metalwork isolated fully with the medium that is corrosive.

This complete anticorrosion wafer type butterfly valve embodiment in conjunction with the accompanying drawings 1, complete anticorrosion wafer type butterfly valve structure schematic representation, Fig. 2, the airtight figure of butterfly plate and valve seat is described further.

Complete anticorrosion wafer type butterfly valve such as Fig. 1, shown in 2, on its two semicircle by ball bearing outer ring shape, following

valve body

10,5, its endoporus has the rectangle annular groove, engaging lug 9 is all arranged, following valve body 5 lower central are connected with short protruding neck, interior is valve rod hole, upper valve body 10 center upper portion have the protruding neck 16 of flanged dish, in establish valve rod hole, valve seat 7 has the cylindric of right angle flanging annulus for both sides, its cross section is Qian shape, in the middle of the endoporus radius being arranged is the rounded channels 19 of R, the tubular sealing neck 4 that protrusion is arranged on diametric periphery, two reinforcement pads 6, its cross section is that prune two jiaos rectangle is rectangular, there is the through hole that cooperates with sealing neck 4 in central authorities, circular plate type butterfly plate body 11 has square hole or splined hole 12 at the diametric(al) center, two is a circular hole, respective outer surfaces is the cylndrical surface of projection, whole dish plate body 11 outer surfaces parcel anticorrosive coat 8, its circumference is the sphere that radius is R, valve rod 18 middle parts are square or spline shape, one end is cylindrical, the other end is cylindrical for the band undergauge, outermost end splines, anticorrosion cover 3 is wrapped up at the undergauge place of one end and the other end, 13, two reinforcement pads 6 are contained on the tubular sealing neck 4 of valve seat 7, its leptoprosopy pastes the valve seat external cylindrical surface, the butterfly plate body 11 that is surrounded by anticorrosive coat 8 is placed valve seat, valve rod 18 is penetrated from the bottom, use then, following

valve body

10,5 endoporus attach to reinforcement pad 6 in the Qian shape groove that sandwiches valve seat 7, in the rectangle annular groove of following valve body inner bore, tubular sealing this moment neck 4, in the insertion, following valve body 10, in 5 the valve rod hole, locate with pin at engaging lug 9 places, and bolt clamps, be pressed into U-shaped seal ring 14 in the valve rod hole of following valve body 5, axle sleeve 2, with end cap 1 and screw sealing, dress U-shaped seal ring 14 in the valve rod hole of upper valve body 10, be pressed into axle sleeve 15, tightly firm with gland 17 and screw, the anticorrosion cover 3 on the

valve rod

18,13 with

axle sleeve

2,15 and the protruding neck of valve seat 4 be axially and radial seal between them, no gap sliding fit is formed.Butterfly plate thicker with valve base sealing as Fig. 2. shown in, the radius R sphere centre is that valve rod revolves a center, the circumference sphere of anticorrosive coat 8, the rounded channels 19 with valve seat 7 is sphere contact seal when turning an angle.The optional magnesium iron of upper and lower valve body, ZG35, WCB, butterfly plate body and function magnesium iron, ZG35 outsourcing F ₄Plastics anticorrosive coat 8, valve rod 18 usefulness 2Cr13 part outsourcing F ₄Anticorrosion cover 3,13, reinforcement pad 6 selects for use silicone rubber or fluorine rubber to be advisable.

This complete anticorrosion wafer type butterfly valve has following characteristics:

1. simple in structure, volume is little, in light weight, 90 ° of rotations open and close rapidly, the operation moment of torsion is little, and Flow characteristics is tending towards straight line, adjusting function the best, sealability is good reliable, improve 10--20 working life doubly, can mate pneumatic, electronic, fluid pressure drive device, can realize the automatic adjusting of technology robot control system(RCS) flow, pressure;

2. valve seat and butterfly plate circumference adopt ball face sealing, need not transitional surface, and the sealing face width is 29mm as the ball face sealing width of DN100, and prior art butterfly valve seal width is 1--1.5mm, does not need big magnitude of interference, assembling easily, good maintenance;

3. butterfly plate, valve rod and valve seat and valve rod hole adopt and axially add radial seal, prevent to leak;

4. the anti-corrosion material cylinder-packing is all used on all surfaces that can contact fed sheet of a media, makes metalwork isolated fully with the medium that is corrosive, and is not etched;

Complete anticorrosion wafer type butterfly valve Specifications;

Inside nominal diameter DN50---800mm

Nominal pressure PN 1 MPa

Seal test pressure 1.1MPa

Applicable temperature-30--250 ℃

The acid of any concentration of Applicable media, alkali, salt, oxygenant, reducing agent, organic solvent, chlorine, chloroazotic acid etc.

This complete anticorrosion wafer type butterfly valve can be widely used in the medium that industrial departments such as oil, chemical industry, medicine, food, metallurgy, nuclear power, water power are carried liquid, the gas of severe corrosive, do not contained particle, but distant control is regulated its flow, pressure automatically.

Embodiment:

Model D71F ₄-10 D371F ₄-10 D971F ₄-10

Inside nominal diameter (mm) 100 200 400

Nominal pressure (Mpa) 1.0 1.0 1.0

R（mm） 47.5 97.5 197

Claims

1, complete anticorrosion wafer type butterfly valve, on its two semicircle by band engaging lug 9, following valve body 10,5, endoporus is to folder reinforcement pad 6 and the cylindric valve seat 7 of flanging is arranged, circular butterfly plate body 11 places valve seat orifice, valve rod 18 is pressed into U-shaped seal ring 14 again from the bottom penetrates down the valve rod hole of valve body 5, axle sleeve 2, with end cap 1 and screw sealing, dress U-shaped seal ring 14 is pressed into axle sleeve 15 in the valve rod hole of upper valve body 10, forms with gland 17 and the tight jail of screw, it is characterized in that, butterfly plate body 11 outer surfaces parcels anticorrosive coat 8, its circumference is sphere, with the rounded channels 19 of valve seat 7 be sphere contact seal.

2,, it is characterized in that the protruding neck of anticorrosion cover 3,13 and axle sleeve 2,15 on the described valve rod 18 and valve seat 4 is axial and radial seal, no gap sliding fit between them by the described complete anticorrosion wafer type butterfly valve of claim 1.