CN203051832U

CN203051832U - Dome valve

Info

Publication number: CN203051832U
Application number: CN 201320027625
Authority: CN
Inventors: 李霆; 杨高峰; 金永琴
Original assignee: Jiangsu Shentong Valve Co Ltd
Current assignee: Jiangsu Shentong Valve Co Ltd
Priority date: 2012-10-05
Filing date: 2013-01-20
Publication date: 2013-07-10
Anticipated expiration: 2023-01-20

Abstract

The utility model provides a dome valve which comprises a valve body, a ball body, a valve rod, a valve seat, a sealing ring and an aerating ring. The valve seat is fixedly connected with the valve body. The sealing rind is installed between the valve body and the valve seat. The aerating ring is arranged in the sealing ring. An air outlet and an air inlet are formed in the aerating ring. An aerating hole is formed in the valve body and communicated with the air outlet and the air inlet of the aerating ring. An ash scraping device is arranged on the valve seat. The dome valve can effectively prevent coal dust from accumulating on a seal face, ensure reliability of a system, prolong service life of the system and save cost.

Description

A kind of dome valve

Technical field

The utility model relates to a kind of valve, particularly relates to a kind of band as air-transport system and scrapes grey valve seat dome valve.

Background technique

The strength conveying mainly selects for use dome valve as switch valve in the industries such as metallurgy, power plant, chemical industry at present, and coal ash is deposited on the sealing surface, influences the sealability of valve, and then influences the normal operation of system.

The model utility content

In order to overcome the above-mentioned shortcoming of existing dome valve, the utility model provides and has the dome valve of scraping apparatus for ash on a kind of valve seat, has effectively prevented the accumulation of coal ash on the sealing surface, guarantees the reliability of system, in the working life of having improved system, saves cost.

The technological scheme that its technical problem that solves the utility model adopts is a kind of dome valve, comprise valve body, spheroid, valve rod, valve seat, seal ring, aeration ring, valve seat is fixedlyed connected with valve body, seal ring is installed between valve body and the valve seat, seal ring inside arranges aeration ring, have on the aeration ring into and out of pore, have communicating into and out of pore on air-filled pore and the aeration ring on the valve body, have on the described valve seat and scrape apparatus for ash.

Scrape apparatus for ash and scrape grey seamed edge for arranging in the valve seat exterior edge face, it is parallel with the spherome surface tangent direction to scrape grey seamed edge.

Scrape the 0.5-1 mm clearance is arranged between grey seamed edge and the spheroid.

The beneficial effects of the utility model are: have on the valve seat and scrape apparatus for ash, effectively prevented the accumulation of coal ash on the sealing surface, guarantee the reliability of system, in the working life of having improved system, save cost.

Description of drawings

The utility model is described in further detail below in conjunction with drawings and Examples.

Fig. 1 is the plan view of present embodiment, is sectional view;

Fig. 2 is the partial enlarged drawing of Fig. 1.

Among Fig. 1,2: 1. valve rod; 2. valve body; 3. air-filled pore; 4. valve seat; 5. into and out of pore; 6. aeration ring; 7. seal ring; 8. scrape grey seamed edge; 9. spheroid.

Embodiment

As shown in Figure 1, 2, a kind of dome valve, comprise valve body 2, spheroid 9, valve rod 1, valve seat 4, seal ring 7, aeration ring 6, valve seat 4 is fixedlyed connected with valve body 2, seal ring 7 is installed between valve body 2 and the valve seat 4, seal ring 7 inside arrange aeration ring 6, have on the aeration ring 6 into and out of pore 5, have communicating into and out of pore 5 on air-filled pore 3 and the aeration ring 6 on the valve body 2, valve seat 4 exterior edge faces arrange scrapes grey seamed edge 8, it is parallel with spheroid 9 surperficial tangent directions to scrape grey seamed edge 8, and scraping between grey seamed edge 8 and the spheroid 9 has the 0.5-1 mm clearance.

In the valve opening process, aeration ring 6 is by inlet, outlet 5 exhausts, and seal ring 7 shrinks, and throws off certain intervals with spheroid 9, along with the rotation of spheroid 9, and scraping grey seamed edge 8 and the coal ash of spheroid 9 surface sediments in time can be disposed on the valve seat 4; In the process of valve closing, scrape grey seamed edge 8 and the coal ash of spheroid 9 surface sediments in time can be disposed equally, guarantee the reliability of system, in the working life of having improved system, save cost.

Claims

1. dome valve, comprise valve body, spheroid, valve rod, valve seat, seal ring, aeration ring, valve seat is fixedlyed connected with valve body, seal ring is installed between valve body and the valve seat, seal ring inside arranges aeration ring, have on the aeration ring into and out of pore, have communicating into and out of pore on air-filled pore and the aeration ring on the valve body, it is characterized in that: have on the described valve seat and scrape apparatus for ash.

2. according to the described a kind of dome valve of claim 1, it is characterized in that: the described apparatus for ash of scraping is scraped grey seamed edge for arranging in the valve seat exterior edge face, and it is parallel with the spherome surface tangent direction to scrape grey seamed edge.

3. according to claim 1 or 2 described a kind of dome valves, it is characterized in that: described scraping has the 0.5-1 mm clearance between grey seamed edge and the spheroid.