CN2068624U

CN2068624U - Small torque eccentric sealing butterfly bamper

Info

Publication number: CN2068624U
Application number: CN 90207537
Authority: CN
Inventors: 杨四云
Original assignee: Individual
Current assignee: Individual
Priority date: 1990-06-01
Filing date: 1990-06-01
Publication date: 1991-01-02

Abstract

The utility model provides an improved sealing butterfly valve, comprising a non-metal elastic material sealing ring with a cone-shaped eccentric sealing face. The non-metal elastic material sealing ring is composed of two eccentric flow channels. A valve rod drives a butterfly plate to close joint with the cone-shaped eccentric sealing face of a valve seat ring for complete sealing. The butterfly plate does not forcibly extrude the sealing ring of a valve seat in a radical direction. The utility model which has the advantages of small frictional resistance, long service life, small operation torque and energy saving is a novel sealing butterfly valve which controls liquid.

Description

Small torque eccentric sealing butterfly bamper

The utility model relates to a kind of improved seal butterfly valve, and it is that a kind of to have a sealing reliable, long service life, and the operation moment of torsion is low, is used for the novel butterfly valve of the defeated control of fluid collection.F16K1／22。

The common butterfly valve that China produces at present, mainly be to produce interference and reach sealing medium by butterfly plate lateral extrusion rubber valve seat ring, so just make butterfly plate operation moment of torsion increase, seat ring is subjected to radially to force extruding, fatigue ruption and fretting wear destroy serious, cause its working life short, the operation moment of torsion is big.

The purpose of this utility model just provides a kind of improved novel butterfly valve structure, changes traditional to produce the structure that interference reaches sealing by butterfly plate lateral extrusion rubber valve seat ring, makes it have that sealing is reliable, the operation moment of torsion is little, the requirement of long service life.

The utility model is finished as follows: the nonmetallic material feather valve seat ring with conical eccentric sealing surface that is made of two eccentric runners is embedded in the valve body, valve rod passes the hole on valve body and the seat ring, with a diameter is that the butterfly plate that Flow diameter adds eccentric size is fixed in the valve seat runner, driving butterfly plate under the driving of handle opens, close rotation, butterfly plate cylindrical and seat ring surface friction drag are very little, when butterfly plate is adjacent to valve seat conical eccentric sealing surface, the complete shut-down position is when rotating 90 °+α angle, be fixed on by the position-limited nail on its handle on the dial of limiting tooth, reach the forced seal effect, so its operation moment of torsion is little, sealing is reliable.

Fig. 1 is the longitudinal sectional view of the utility model concrete structure;

Fig. 2 is the sectional view of Fig. 1 along the c-c line, i.e. sealing configuration view.

Most preferred embodiment of the present utility model is as follows:

The seat ring of being made by non-metallic elastic material 4 is installed in the valve body 2 that satisfies its requirement of strength, fits tightly with valve interior wall, and this seat ring has the left and right sides conical seal (contact) face 10 that is made of two eccentric runners 11,12; The hole that valve rod 1 and 5 passes on valve body 2 and the seat ring 4 is fixed on butterfly plate 3 in the seat ring 4, has conical seal (contact) face 9 on the eccentric butterfly plate cylindrical, handle 7 is installed on the valve rod 5, when operating grip 7, valve rod 5 drives butterfly plate 3 motion under the driving of handle 7, reach connection, block the purpose with regulated fluid.When handle 7 actuate valve stem 5 drive butterfly plates 3 turned over 90 °+α, butterfly plate conical seal (contact) face 9 fitted tightly with seat ring conical seal (contact) face 10 when closing.Because the position-limited nail 8 on the handle 7 is fixed on the dial that has limiting tooth 6 that is contained on the valve body 2, reaches its purpose of forced seal reliably.

Advantage of the present utility model reaches fully sealing because butterfly plate and seat ring conical seal (contact) face fit tightly; Radially force extruding, frictional resistance is little, and moment of torsion is little, so energy-conservation purpose is grown and reached to the life-span.

Claims

1, the low moment of torsion heart seal butterfly valve that is used for fluid control, constitute by handle 7, dial 6, valve rod 1,5, valve body 2, butterfly plate 3, seat ring 4, it is characterized in that valve rod 1,5 passes the hole on valve body 2, the valve seat 4, butterfly plate is fixed in the seat ring, seat ring have that two eccentric runners 11,12 constitute about band conical eccentric sealing surface 10, have conical seal (contact) face 9 on the butterfly plate cylindrical, butterfly plate sealing surface 9 fits tightly with seat ring sealing surface 10.

2, according to the described butterfly valve of claim 1, it is characterized in that: the position-limited nail 8 on the handle 7 with the butterfly plate fixed-site the band limiting tooth dial 6 on.

3, according to the described butterfly valve of claim 1, it is characterized in that: the butterfly plate diameter is that channel size adds eccentric size.