CN201065948Y

CN201065948Y - Slag-discharging type metal hard sealing butterfly valve

Info

Publication number: CN201065948Y
Application number: CNU2007200853495U
Authority: CN
Inventors: 王洪运; 杨宇茂
Original assignee: HUBEI HONGCHENG GENERAL MACHINERY CO Ltd
Current assignee: HUBEI HONGCHENG GENERAL MACHINERY CO Ltd
Priority date: 2007-06-20
Filing date: 2007-06-20
Publication date: 2008-05-28
Anticipated expiration: 2017-06-20

Abstract

The utility model relates to a slag discharge type metal hard sealing butterfly valve used for blocking and communicating with a medium on a water distributing pipe. A through hole used for discharging slag is arranged at the bottom of a valve body, a butterfly plate is supported on a valve axle in the valve body, the valve axle is arranged on the valve body, a valve seat sealing surface and a butterfly plate sealing ring are both designed into circular arc surfaces, impurities in the medium is uneasy to be deposited and stacked, a pair of water flushing pipes are symmetrically arranged on the both sides of the valve body, high pressure water can wash the slag on the sealing surface away through the flushing pipes, the slag is discharged through slag discharge holes, the sealing surface can not be damaged by the impurities, and the sealing performance of a sealing pair is ensured.

Description

The dregs-removing type metal hard-sealing butterfly valve

Technical field:

The utility model relates on the water-supply pipeline and blocks, is communicated with the butterfly valve of medium, particularly relates to metal hard-sealing butterfly valve.

Background technique:

Generally all contain a spot of impurity in the various industrial pipelines, in the medium,, contain dust in the dust removing tube as containing silt in the water distributing network.In the whole system running, these impurity are deposited near the valve seat possibly, when serious even be deposited on the sealing surface of seat, the infringement valve sealing face causes sealing face leakage, in case the metal hard-sealing butterfly valve sealing face damage, then be difficult to repair simultaneously, when valve opens and closes, be easy to damage seal ring and influence sealing effect, cause leakage.

Summary of the invention:

The purpose of this utility model is to provide a kind of dregs-removing type metal hard-sealing butterfly valve, and it is a kind of valve that prevents the contamination precipitation in the medium at sealing surface of seat.

Technological scheme:

The utility model comprises valve body, valve seat, butterfly plate, valve shaft, the valve body downstream side has a valve seat, butterfly plate to be supported on the interior valve shaft of valve body, valve shaft is contained on the valve body, sealing surface of seat and butterfly plate seal ring are smooth arc surface, make impurity be difficult for piling up on sealing surface, valve body is dolioform, in the valve body bilateral symmetry a pair of flush pipe is set, flush pipe is outside to be connected with high-pressure water, and establishes a deslagging in the valve body bottom and use the hole.

The utility model has the advantages that:

1, sealing surface of seat of the present utility model and butterfly plate seal ring are arc surface, and be very smooth, and therefore, when medium passed through, impurity was difficult for precipitation, piles up, and makes its good sealing effect, does not leak.

2, the utility model is provided with a pair of flush pipe in the valve body bilateral symmetry, and flush pipe is connected with the high-pressure water of outside, its high pressure water can wash slag thing on the sealing surface by flush pipe, its slag thing is discharged by the through hole of valve body bottom, guaranteeing does not have contamination precipitation, accumulation on the sealing surface, has guaranteed the sealability of sealing pair.

Description of drawings:

Fig. 1 is the utility model structural drawing;

Fig. 2 is the utility model shape assumption diagram.

Embodiment:

Referring to accompanying drawing embodiment, the utility model is further described:

Among Fig. 1-2, there is a valve seat 2 in the downstream side of valve body 1, and butterfly plate 3 is supported on the valve shaft 4 in the valve body 1, and valve shaft 4 is contained on the valve body 1, valve seat 2 is fixed on the valve body 1, the sealing surface of the sealing surface of valve seat 2 and butterfly plate 3 is arc surface, makes the impurity in the medium be difficult for precipitation and accumulation, and valve body 1 is dolioform, shape of the mouth as one speaks circle 5 valve bodies 1 bilateral symmetry has a pair of flush pipe 8, flush pipe 8 is aimed at the settling zone 7 of valve bodies 1 bottom, flush pipe 8 be externally connected to high-pressure water pipe, a mud hole 6 is arranged at the bottom of valve body 1.The outer high pressure water of flush pipe 8 enters the settling zone 7 of valve body bottom by ball valve 9, the impurity in the medium is washed, and waste water and slag thing are discharged by the mud hole 6 of valve body 1 bottom.

Claims

1. one kind relates on the water-supply pipeline and blocks, the dregs-removing type metal hard-sealing butterfly valve that is communicated with medium, comprise valve body (1), valve seat (2), butterfly plate (3), valve shaft (4), there is a valve seat (2) in the downstream side of valve body (1), butterfly plate (3) is supported on the interior valve shaft (4) of valve body (1), valve shaft (4) is contained on the valve body (1), it is characterized in that: valve seat (2) sealing surface and butterfly plate (3) seal ring are smooth arc surface, valve body (1) is dolioform, in valve body (1) bilateral symmetry a pair of flush pipe (8) is arranged, flush pipe (8) is outside to be connected with high-pressure water, and in valve body (1) bottom one mud hole (6) is set.