CN2505653Y

CN2505653Y - Anti-sand butterfly valve

Info

Publication number: CN2505653Y
Application number: CN 01251787
Authority: CN
Inventors: 王洪运; 张军仿
Original assignee: Hubei Hongcheng General Machinery Co ltd
Current assignee: Hubei Hongcheng General Machinery Co ltd
Priority date: 2001-09-06
Filing date: 2001-09-06
Publication date: 2002-08-14
Anticipated expiration: 2011-09-06

Abstract

The utility model relates to an anti-sand butterfly valve which belongs to the control valve for controlling switching in a drain pipe network system field. The utility model consists of a valve body, a butterfly plate, a valve shaft, a shaft end seal, a primary seal and an actuating mechanism, wherein, multiple seal is realized by supplying automatic compensation inside the shaft end seal through a waveform spring, and sands are effectively prevented from entering a bearing, thereby the butterfly valve has good anti-sand capacity. The utility model solves the problem that the butterfly valve can not be switched on and off due to the entrance of the sands into the sliding bearing when a prior common butterfly valve is used, and is widely suitable for use in various drainage systems, and is especially suitable for use in the pipe network of the Yellow River Basin.

Description

Anti-silt butterfly valve

A kind of anti-silt butterfly valve belongs to the control valve field that control opens and closes in the water supply and sewerage pipeline system.

In the supply and drain water system of China, particularly in the pipe network system of the Huanghe valley, generally all contain a large amount of silts in the water, be easy to cause the akinesia of pipe network control valve and ineffective.Particularly to common butterfly valve, silt easily enters in the sliding bearing, the serious consequence that causes butterfly valve not open and close often occurs.

The purpose of this utility model is: provide a kind of and can prevent effectively that silt from entering in the bearing, seal form adopts the anti-silt butterfly valve of the multi-sealing structure of compensability.

The utility model is achieved through the following technical solutions its above-mentioned purpose.

This anti-silt butterfly valve is by valve body 12, butterfly plate 8, valve shaft 2, bearing 3, shaft end seal 14, primary seal 18 and driving mechanism 13 are formed, it is characterized in that: a driving mechanism 13 is equipped with in the outside of valve body 12, by valve shaft 2 butterfly plate 8 is housed in the valve body 12, be provided with primary seal 18 between valve body 12 and the butterfly plate 8, primary seal 18 is by butterfly plate seal ring 10, valve seals 9 and adjusting pressing plate 11 constitute, valve seals 9 is welded on the valve body 2, butterfly plate seal ring 10 is fixed on the outer ring of butterfly plate 8 by regulating pressing plate 11, shaft end seal 14 is one and is sleeved on valve shaft 2 ends and bearing 3 assembly on every side, by V-type filler 1, Gland 15, bearing support 16, wavy spring 4, interior sealing seat 17, Yx seal ring 5, positioning ring 6 and quad seal circle 7 are formed, interior sealing seat 17 is equipped with in the inner of bearing 3, Yx shape seal ring 5 and positioning ring 6 are housed on the interior sealing seat 17, between positioning ring 6 and butterfly plate 8 end faces, quad seal circle 7 is housed, the bearing 3 outer bearing supports 16 that are provided with, bearing support 16 passes through bolt with valve body 2, V-type filler 1 and Gland 15 are housed between bearing support 16 and valve shaft 2, one group of wavy spring 4 is housed between bearing support 16 and interior sealing seat 17.

The utility model has the advantages that sealing structure of shaft end adopts the multi-sealing structure of compensability, can provide automatically, make the keying of valve more flexible, make things convenient for because the required seal pressure power of wearing and tearing has prevented that effectively silt from entering in the bearing.

The utility model will be further described for following structure accompanying drawing.

Accompanying drawing 1 is the plan view of anti-silt butterfly valve;

Accompanying drawing 2 is the side view of anti-silt butterfly valve;

Accompanying drawing 3 is the A-A sectional view.

This anti-silt butterfly valve mainly is made up of valve body 12, butterfly plate 8, valve shaft 2, bearing 3, shaft end seal 14, primary seal 18 and driving mechanism 13.Butterfly plate 8 in the valve body 12 drives valve shaft 2 by driving mechanism 13 and opens it, and is set with a shaft end seal 14 on the valve shaft 2.Shaft end seal 14 structures have adopted the multi-sealing structure of compensability.It mainly is made up of V-arrangement filler 1, Gland 15, bearing support 16, wavy spring 4, primary seal 17, Yx seal ring 5, positioning ring 6 and quad seal circle 7.Quad seal circle 7 and positioning ring 6 are as anti-silt defence line, first road, and simultaneously, wavy spring 4 thereafter can provide automatically because the former required seal pressure power of wearing and tearing makes the first line of defence more reliable; Yx seal ring 5 is as anti-silt defence line, second road, and its material adopts polyurethane material, and good springiness has selfsealings; V-arrangement filler 1 adopts adjustable structure, prevents from effectively to leak outside.Because this butterfly valve has prevented that effectively silt from entering in the bearing, thereby makes butterfly valve have very strong anti-silt.

Claims

A kind of anti-silt butterfly valve, it is by valve body 12, butterfly plate 8, valve shaft 2, bearing 3, shaft end seal 14, primary seal 18 and driving mechanism 13 are formed, it is characterized in that: a driving mechanism 13 is equipped with in the outside of valve body 12, by valve shaft 2 butterfly plate 8 is housed in the valve body 12, be provided with primary seal 18 between valve body 12 and the butterfly plate 8, primary seal 18 is by butterfly plate seal ring 10, valve seals 9 and adjusting pressing plate 11 constitute, valve seals 9 is welded on the valve body 2, butterfly plate seal ring 10 is fixed on the outer ring of butterfly plate 8 by regulating pressing plate 11, shaft end seal 14 is one and is sleeved on valve shaft 2 ends and bearing 3 assembly on every side, by V-type filler 1, Gland 15, bearing support 16, wavy spring 4, interior sealing seat 17, Yx seal ring 5, positioning ring 6 and quad seal circle 7 are formed, interior sealing seat 17 is equipped with in the inner of bearing 3, Yx shape seal ring 5 and positioning ring 6 are housed on the interior sealing seat 17, between positioning ring 6 and butterfly plate 8 end faces, quad seal circle 7 is housed, the bearing 3 outer bearing supports 16 that are provided with, bearing support 16 passes through bolt with valve body 2, V-type filler 1 and Gland 15 are housed between bearing support 16 and valve shaft 2, one group of wavy spring 4 is housed between bearing support 16 and interior sealing seat 17.