CN2554430Y

CN2554430Y - Eccentric butterfly valve

Info

Publication number: CN2554430Y
Application number: CN 02262830
Authority: CN
Inventors: 梁怀琪; 郝彩霞
Original assignee: ZHONGTIAN ENERGY EQUIPMENT CO Ltd JIANGDU CITY
Current assignee: ZHONGTIAN ENERGY EQUIPMENT CO Ltd JIANGDU CITY
Priority date: 2002-06-28
Filing date: 2002-06-28
Publication date: 2003-06-04
Anticipated expiration: 2012-06-28

Abstract

The utility model relates to an eccentric butterfly valve, which belongs to the mechanical industry technical field, in particular to the pipeline valve technology. The utility model mainly comprises a valve body, a valve seat, a valve plate and a valve seat gland. The utility model is characterized in that the valve plate is arranged near the center inside the valve body, and the valve plate adopts a reversed U-shaped structure, a valve rod (I) and a valve rod (II) are arranged on the valve plate, the two sides of the valve plate both have sealing cushions, the valve seat is pressed by the valve seat gland, and the valve seat gland and the valve body are firmly connected by a bolt. The utility model has flexible operation, long service life, convenient maintenance, small medium voltage drop and simple structure, and especially has special usage performance advantage to the media having both solid viscous material and crystal in solid, gas and solid, liquid and solid, and gas and liquid, and has better sealing performance; the arrangement of an eccentricity A can realize self-locking and wear compensation, and the arrangement of an eccentricity B can realize the flexibility of opening and closing.

Description

Novel eccentric-butterfly-valve

Technical field

Novel eccentric-butterfly-valve belongs to the mechanical industry technical field, relates in particular to the pipeline valve technology.

Background technique

Industrial use pipeline valves such as China's oil, chemical industry, metallurgy, electric power, light industry, building materials are used always at present ball valve, butterfly valve, gate valve and stop valve etc.Because ducted medium is that solid (as ash, coal dust), gas add solid, liquid adds solid etc., all there are solid viscosity thing and crystal to separate out in gas and the liquid, some medium harmfulness is very big, explosive inflammable, medium easily leaks, and makes ball valve or hard seal butterfly valve and other valve opening and closing not in place, rotates dumb, sealing is poor, and working life is short.And existing hard seal butterfly valve is a straight-through structure, adopts both sides sealing, and valve is when opening, and the valve plate horizontal stroke increases the flow resistance of pipeline medium in the axial direction, and pressure drop is bigger, and sealing is poor, keeps in repair very inconvenient.

Technological scheme

The purpose of this utility model provides a kind of various media that are applicable to, good airproof performance, and the medium pressure drop is little, flexible operation, long service life, novel eccentric-butterfly-valve easy to maintenance.

The utility model mainly comprises valve body, valve seat, valve plate, the valve seat gland, valve plate is arranged on partial center position in the valve body, valve plate is an inverted U-shaped, valve plate is provided with valve rod (I) and valve rod (II), two faces of valve seat are equipped with sealing gasket, and the valve seat gland is pushed down valve seat, by bolt valve seat gland and valve body is fastenedly connected.

This novel eccentric-butterfly-valve is control, regulates the critical component of pipeline medium, and the sealing surface of valve plate and valve seat is the annulus cambered surface, and sealing surface can be according to different medium in the pipeline, adopt different materials, make hard sealability better, flexible operation, long service life, the medium pressure drop is little, and is simple in structure.

Because it is B that there is an eccentric distance at valve plate cambered surface center and valve rod center, it is A that there is an eccentric distance at valve body center and valve rod center, 2+B=A, and the setting of throw of eccentric A can realize self-locking and wear compensation.The setting of throw of eccentric B can realize opening and closing flexibly slim and graceful.

The setting of this pair off-centre is rotated flexibly valve plate, and half-twist is finished switching.It is tight more to close Shi Yueguan at valve plate, has auto-lock function, and can cut off attached to the attachment on valve plate and the sealing surface of seat, and sealability is better, and medium does not have leakage, uses easy to maintenance.

Description of drawings

Fig. 1 is the utility model structural representation

Fig. 2 is the utility model sectional view

Among the figure, 1 valve seat gland, 2 valve seats, 3 valve rods (I), 4 valve plates, 5 valve bodies, 6 fillers, 7 valve rods (II), 8 sealing gaskets, 9 sealing gaskets, 10 bolts, 11 keys.

Specific embodiment

Valve plate 4 valve body 5 of packing into, valve rod (I) 3 inserts in valve plate 4 left hole, fastening by bolt 10 and valve body 5, valve rod (II) 7 inserts in valve plate 4 right ports, fixing with key 11, sealing gasket 8 is installed in the last plane of the valve seat 2 of valve body 5 lower ends, between the lower plane of valve seat 2 and the valve seat gland 1 sealing gasket 9 is housed, valve seat 2 is the annulus cambered surface with the sealing surface of valve plate 4, sealing surface is a high-wear-resistant alloy, and is fastening at valve seat gland 1 and valve body 5 usefulness bolts 10, can guarantee that the valve seat 2 and the arc surface of valve plate 4 fit tightly, make the pipeline medium not have leakage, hard sealing is reliable.

Valve plate 4 is hard sealing cambered surface with the sealing surface of valve seat 2, it is B that there is an eccentric distance at the center of its sealing cambered surface center and valve rod (I) 3, valve rod (II) 7, it is A that there is an eccentric distance at the center of the axial centre of valve body 5 and valve rod (I) 3, valve rod (II) 7,2+B=A (mm).If can remove sealing gasket 8 behind the sealing surface wear, valve seat 2 to reach, is readjusted, by bolt 10 that valve seat gland 1 and valve body 5 is fastening again, valve seat 2 and valve plate 4 arc surfaces are fitted tightly, reach sealing purpose, easy to maintenance, convenient, thus increase the service life.

Owing to adopt two eccentric structures, make valve plate 4 opening and closing operations light, moment of torsion is little, has self-locking and integrated abrasion compensation, does not increase the resistance that the pipeline medium flows, and is safe and reliable.

The utility model is of many uses, is Φ 500～800mm person to pipeline drift diameter, and this valve cuts out with can realizing for 8 seconds; Pipeline drift diameter is the following person of Φ 500mm, and this valve cuts out with can realizing for 5 seconds, uses engineering pressure 0～4.0Mpa, can be used as repid cut-off valve.

The utility model flexible operation, long service life, easy to maintenance, the medium pressure drop is little, simple in structure, especially to solid, gas add solid, liquid adds the medium that all has solid viscosity thing and crystal to separate out in solid, gas and the liquid, and special usability advantage is arranged, and makes sealability better, the setting of throw of eccentric A, can realize self-locking and wear compensation, the setting of throw of eccentric B can realize opening and closing flexibly slim and graceful.

The utility model also can be used as Flow-rate adjustment, can substitute the butterfly valve of gate valve, stop valve, ball valve and other structure.

Claims

1, novel eccentric-butterfly-valve mainly comprises valve body, valve seat, valve plate, valve seat gland, it is characterized in that valve plate is arranged on partial center place in the valve body, valve plate is an inverted U-shaped, valve plate is provided with valve rod (I) and valve rod (II), two faces of valve seat are equipped with sealing gasket, the valve seat gland is pushed down valve seat, by bolt valve seat gland and valve body is fastenedly connected.

2, novel eccentric-butterfly-valve according to claim 1, the sealing surface that it is characterized in that valve plate and valve seat, sealing gasket is hard sealing cambered surface, it is B that there is an eccentric distance at its sealing cambered surface center and valve rod center, and it is A that there is an eccentric distance at valve body axial centre and valve rod center, 2+B=A (mm).