CN2310205Y - Air insulating valve - Google Patents

Abstract

The utility model relates to an air insulating valve. A valve body is divided into an upper cavity, a middle cavity and a lower cavity; a water inlet is communicated with the upper cavity; a water outlet is communicated with the middle cavity; the lower cavity is provided with a drain hole; a valve rod runs through the three cavities; the upper end of the valve rod is provided with a diaphragm; the valve flap of the middle part of the valve rod is arranged in the upper cavity, and the valve port of the upper cavity and the middle cavity; the lower valve flap of the lower part of the valve rod is arranged in the lower cavity, and the valve port of the lower cavity and the middle cavity; the water outlet is provided with a one-way valve; the water outlet is communicated with the upper cavity of the valve body by a conducting tube. The utility model can effectively avoid the mixed flow pollution caused by that a drinking-water pipe is connected with a non drinking-water pipe.

Description

Air insulating valve

The utility model relates to a kind of fluid and cuts off valve.

The Drinking Water pipe links to each other with the nonpotable water pipe and causes mixed flow to pollute easily, and for example the fire supply system in the building all directly links to each other with the Drinking Water pipeline, because the ponding in the fire-fighting system does not flow at ordinary times, mushroom grows breeding easily.Especially when fire water pump (general January once) inspection regularly, the hydraulic pressure of fire-fighting system raises, and intrasystem ponding enters potable water supply system easily, causes mixed flow to pollute.

The purpose of this utility model provides a kind of Air insulating valve, prevents the mixed flow pollution that the Drinking Water pipe links to each other with the nonpotable water pipe and causes.

The technical solution of the utility model is:

This Air insulating valve mainly is made up of valve body, valve gap, flap, valve rod, water intake and water outlet, it is characterized in that:

Valve body divides epicoele, lumen and cavity of resorption, and water intake communicates with epicoele, and water outlet communicates with lumen, establishes discharge opening in cavity of resorption;

Valve rod runs through this three chambeies, the valve rod upper end has a periphery to be fixed in the diaphragm of valve body epicoele, the epicoele top part is divided into two-part up and down, and the flap at valve rod middle part is positioned at the valve port place of epicoele, epicoele and lumen, and the lower Disc of valve rod lower end is positioned at the valve port place of cavity of resorption, cavity of resorption and lumen;

An one-way valve is arranged at the water outlet place, and water outlet is communicated with by a conducting tube with the valve body epicoele.

Convenient for throttling, on the above-mentioned conducting tube throttle valve can be arranged.

Working procedure of the present utility model: when normal water supply, flow into the valve body epicoele, diaphragm is pushed up to the top by water intake, valve rod is risen, and the valve port that flap will lead to water outlet is opened, simultaneously, lower Disc will lead to the valve port closure of discharge opening, make current flow to downstream line by one-way valve.During when the hydraulic pressure of water outlet oral-lateral in case greater than the water inlet oral-lateral, current trend reverse flow, this moment, one-way valve was closed automatically, hydraulic pressure reaches the top of diaphragm by conducting tube and throttle valve, at this moment, the upper pressure of diaphragm is greater than the bottom, this pressure differential valve rod moves down until flap closes fully, and simultaneously, lower Disc is opened discharge opening, Yu Shui is released, at this moment, valve body lower portion forms cavity, and contaminated water can only be flowed out by discharge opening, can't enter the Drinking Water pipeline, thereby guarantee that Drinking Water is not contaminated.

The utility model has the advantages that and effectively to cut off the backflow of fluid that the mixed flow of avoiding the Drinking Water pipe to link to each other with the nonpotable water pipe causing is polluted at the valve outlet place.Be particularly useful for preventing the pollution of fire supply system and Drinking Water pipe mixed flow.

Below in conjunction with drawings and Examples the utility model is elaborated:

Fig. 1 is a structural representation of the present utility model.

As scheming: this Air insulating valve, mainly form by valve body 1, bonnet 2, bottom 10, flap, valve rod water intake 12 and water outlet 13, valve body 1 minute epicoele 14, lumen 15 and cavity of resorption 16, water intake 12 communicates with epicoele 14, water outlet 13 communicates with lumen 15, establishes discharge opening 11 in cavity of resorption 16; Valve rod 8 runs through this three chambeies, the valve rod upper end has a periphery to be fixed in the diaphragm 5 of valve body epicoele, the epicoele top part is divided into two-part up and down, the flap 7 at valve rod 8 middle parts is positioned at the valve port place of epicoele, epicoele and lumen, and the lower Disc 9 of valve rod 8 lower ends is positioned at the valve port place of cavity of resorption, cavity of resorption and lumen; An one-way valve 6 is arranged at the water outlet place, and water outlet is communicated with by a conducting tube 3 with the valve body epicoele, can be equipped with throttle valve 4 on the conducting tube.

Claims (2)

1, a kind of Air insulating valve mainly is made up of valve body, valve gap, flap, valve rod, water intake and water outlet, it is characterized in that:

Valve body divides epicoele, lumen and cavity of resorption, and water intake communicates with epicoele, and water outlet communicates with lumen, establishes discharge opening in cavity of resorption;

Valve rod runs through this three chambeies, the valve rod upper end has a periphery to be fixed in the diaphragm of valve body epicoele, the epicoele top part is divided into two-part up and down, and the flap at valve rod middle part is positioned at the valve port place of epicoele, epicoele and lumen, and the lower Disc of valve rod lower end is positioned at the valve port place of cavity of resorption, cavity of resorption and lumen;

An one-way valve is arranged at the water outlet place, and water outlet is communicated with by a conducting tube with the valve body epicoele.

2, Air insulating valve according to claim 1 is characterized in that: on the described conducting tube throttle valve is arranged.