CN2410495Y

CN2410495Y - Down opening wedge-shaped gate valve

Info

Publication number: CN2410495Y
Application number: CN 99250871
Authority: CN
Inventors: 王伯龙; 司俊奎; 王岩; 李福如
Original assignee: HARBIN CITY SPECIALS FACTORY
Current assignee: HARBIN CITY SPECIALS FACTORY
Priority date: 1999-12-30
Filing date: 1999-12-30
Publication date: 2000-12-13
Anticipated expiration: 2009-12-30

Abstract

The utility model relates to a down opening wedge-shaped gate valve, which is provided with a valve body; a gate plate is arranged on the valve body; a sealing ring is arranged between the gate plate and the valve body; the lower half part of a valve rod is connected with the inner part of the gate plate through screw threads; a valve rod nut is arranged at the middle part of the valve rod; an upper valve rod opening of the valve body is fixedly connected with a packing box through a screw bolt; the lower part of the valve body is fixedly connected with a valve cover through the screw bolt; a drain outlet is arranged on the valve cover. The downward opened gate valve can ensure to reduce the height of medium in the inner chamber of the valve in structure, and thereby, reduces the temperature difference between the inner chamber of the valve and the position of a pipeline, can effectively prevent partial frost crack, and is particularly suitable for being used as a gate valve for underground water supply pipelines, oil pipelines, gas pipelines, sewage pipelines, etc. in north cold areas.

Description

Under open Wedge gate valve

The utility model relates to the feedwater piping gate valve.

Flashboard moved upward when present widely used gate valve was opened, the height of valve tip improves, so just improved the temperature difference of valve cavity top and pipeline position, be the main cause that causes groundwater supply pipe line part (top) bursting by freezing of north cold area, addressing this problem becomes urgent need.

Task of the present utility model is: overcome the deficiencies in the prior art, design a kind of simple in structurely, can prevent local bursting by freezing, the following Wedge gate valve that opens of periodical blowdown.

Task of the present utility model realizes as follows: it has a valve body to open Wedge gate valve down, flashboard is housed on it, between flashboard and the valve body seal ring is housed, the interior Lower Half of flashboard by the valve rod that is threaded, Stem Mut is equipped with at middle part at valve rod, the top valve stem port of valve body is fixed with Stuffing box by bolt, and the bottom of valve body is fixed with valve gap by bolt, and valve gap is provided with sewage draining exit.

The utility model since during opening of valves flashboard move downward, therefore can reduce the height of valve cavity medium, thereby reduce the height of valve cavity medium, reduced the temperature difference of valve cavity top and pipeline position effectively, can prevent local bursting by freezing effectively; Owing on valve gap, have a blowdown inspection socket, so not only can periodical blowdown, can also check valve whether close tight.

Fig. 1 is the utility model front section view.

A most preferred embodiment of the present utility model, as figure, under open Wedge gate valve it have a valve body 4, flashboard 6 is housed on it, seal ring 5 is housed between flashboard and the valve body, be positioned at the Lower Half of flashboard by the valve rod 7 that is threaded, at the middle part of valve rod Stem Mut 8 is housed, the top valve stem port of valve body is fixed with Stuffing box 11 by bolt 9, and plain cushion 10 is housed between valve body and the Stuffing box, and filler 12 is housed in the Stuffing box, Stuffing box has Gland 13, Gland and Stuffing box fuse by bolt 14, and the bottom of valve body is fixed with valve gap 1 by bolt, valve gap is provided with sewage draining exit 17, and sewage draining exit has gland 16 and is connected by screw 15.

The working procedure of this device is: (Open valve) dextrorotation rotating valve rod, and valve rod only rotates and can not move up and down, and the flashboard that constitutes kinematic pair with it moves downward, thus Open valve; When throttle down, be rotated counterclockwise valve rod, flashboard moves upward, until throttle down.

Claims

1, opens Wedge gate valve under a kind of, it has a valve body, flashboard is housed on it, between flashboard and the valve body seal ring is housed, it is characterized in that: by the Lower Half of the valve rod that is threaded, at the middle part of valve rod Stem Mut is housed in the flashboard, the top valve stem port of valve body is fixed with Stuffing box by bolt, the bottom of valve body is fixed with valve gap by bolt, and valve gap is provided with sewage draining exit.

2, open Wedge gate valve under as claimed in claim 1, it is characterized in that: filler is housed in the Stuffing box, and Stuffing box has Gland, and Gland and Stuffing box fuse by bolt.