CN2191951Y

CN2191951Y - Frost valve for steam pipeline

Info

Publication number: CN2191951Y
Application number: CN 93246740
Authority: CN
Inventors: 陈宜中
Original assignee: Individual
Current assignee: Individual
Priority date: 1993-12-06
Filing date: 1993-12-06
Publication date: 1995-03-15
Anticipated expiration: 2003-12-06

Abstract

The utility model relates to a freezing prevention device in a steam pipeline, belonging to freezing prevention technique for pipelines. In the utility model, a steam pipe (1) and a slide valve pipe (3) are fixedly connected together through a connecting pipe (2), and a movable valve post (4) is arranged in the slide valve pipe; a path (5) in which water flows is arranged on the slide valve pipe; the lower end of the valve post is inserted in a spring sleeve (7), and the lower part of the slide valve pipe is provided with a spring base (9) which is provided with a water outlet (10). The utility model is characterized in that when steam pressure exists in the steam pipe, the valve post moves downwards, a valve opening (6) and the valve post are clogged, and therefore, the steam pipe is of no air leakage under work pressure; when no steam in the steam pipe is transported, the valve post is bounced through a pressure spring, the valve opening is opened, and the condensing water in the steam pipe is discharged for freezing prevention.

Description

Frost valve for steam pipeline

The utility model relates to a kind of anti-icer, particularly the steam pipework frost valve.

In winter, when boiler failure or when saving false blowing out, it is freezing to tend to take place the low level steam tube, and existing thermal insulating material mainly is to prevent that steam heat runs off, and pressure reduces, and usually powerless for severe cold.Some factory of the north is for addressing this problem, also be close to a thin steam tube on main steam tube side, when main steam tube stopped to fail vapour, thin steam tube did not stop vapour, though antifreeze like this, but not only the facility expense is big, energy consumption is big, and low level steam tube ponding still can not get rid of, though do not freeze, but still easily produce sediments, it is unimpeded to influence pipeline.

After the purpose of this utility model provides a kind of steam tube and stops defeated vapour, make the antifreeze valve of steam pipework thereby can bleed off steam tube ponding automatically.

The purpose of this utility model is achieved in that in low level steam tube bottom opens a through hole, connect a pipe that is referred to as the guiding valve pipe, there is a valve port at guiding valve pipe middle part, a valve rod that can slide on tube wall is arranged above the valve port, the bottom of valve rod is a upper coarse and lower fine cone near the place of valve port, the butt end of cone can not pass through valve port on the valve rod, but can seal valve port, the thin end prolongation of cone on the valve rod, that is be that the bottom of valve rod and a stage clip in the guiding valve pipe join, base with holes of the other end of stage clip and guiding valve pipe bottom joins.When in the steam tube steam being arranged, steam promotion valve rod overcomes the tension force of stage clip and moves down, and the butt end of cone seals valve port on valve rod, therefore steam can not leak, but when stopping in the steam tube failing vapour, vapor pressure disappears, therefore under the stage clip effect, valve rod is mentioned, so valve port is opened, because the middle part (not exceeding valve port) to valve rod offers flow channel on the valve rod, so connate water just can be along this passage in the steam tube, water is discharged in hole on valve port and guiding valve pipe base.

The utility model is owing to can make water outflow in the low level steam tube during no steam in the steam tube, steam tube is not frozen, and do not wait the in-tube condensation coolant-temperature gage to fall very lowly, the elastic force of stage clip just makes valve rod rise, valve port is open, at this moment the sludge in the condensed water does not also have because of Yu Biguan has been discharged from outside the pipe, helps the unimpeded of pipeline.

The concrete structure of model utility is drawn by following embodiment and accompanying drawing thereof.

(1) expression steam tube in the accompanying drawing, (3) expression guiding valve pipe, by connecting tube (2) they are fixed together between them, the valve rod (4) that can slide up and down is housed in the guiding valve pipe, valve rod is near one section of valve port (6), be upper coarse and lower fine cone, the thin end prolongation of garden awl stretches into the spring cover of usefulness (7) expression, spring cover bottom holds stage clip (8), and the stage clip bottom is pressed on the press spring base of usefulness (9) expression, and press spring base can turn in silk mouth (11), in order to regulate the elastic force of stage clip, also penetrating the water outlet with (10) expression on the press spring base, open walk (5) is gone back in the centre of valve rod (4), and (12) are the water cavities in the guiding valve pipe.

When in the steam tube steam being arranged, vapour pressure is pressed to valve rod (4) through connecting tube (2), make valve rod overcome the elastic force of stage clip (8) and move down, cause the cone of valve rod partly to be pressed on the valve port (6), valve port is closed, when in the steam tube during no vapor tension, valve rod disappears from the vapor tension of upper end, so under the effect of stage clip, rise rapidly, cause the cone of valve rod partly to break away from valve port (6), valve port is promptly opened, at this moment the condensed water in the steam tube just enters the guiding valve pipe through connecting tube, and the passage (5) in the middle of the valve rod of flowing through (4), arrive water cavity (12), flow through the valve port of having opened (6) again, from the water outlet (10) of press spring base (9), flow out at last, because ponding has flowed out so nothing ice can be tied in the steam tube.

For easy to use, this frost valve preferably can make up with STEAM TRAP.

Claims

1, a kind of steam pipework frost valve, it comprises a guiding valve pipe, there is valve port at the middle part of guiding valve pipe, a valve rod is arranged above the valve port, there is flow channel the valve rod upper end to the middle part, and a base with holes is arranged at guiding valve pipe bottom, it is characterized in that the bottom of valve rod and a stage clip in the guiding valve pipe join.