CN202338668U - Self-reliance breather valve - Google Patents

Abstract

The utility model relates to a self-operated breathing valve, which is used to solve the problems that a self-spraying sealed water well is pumped out and the liquid level of the well water is difficult to measure accurately. The breathing valve includes a valve body, an upper valve cover and a lower valve cover respectively connected to the upper and lower ends of the valve body, and a piston located in the breathing valve. Since the piston can move up and down in the valve body, the breathing valve is opened or closed. , the breathing valve is opened to connect the well with the outside world, thereby effectively solving the problem of pumping out of the well when pumping water, and the liquid level in the well can also be accurately measured, and when the pressure in the well rises, the breathing valve is closed to prevent the well water from spraying out. Moreover, the structure is simple and the maintenance is convenient.

Description

A self-operated breathing valve

technical field

The utility model relates to the field of breathing valves, in particular to a self-operated breathing valve used in self-spraying sealed water wells in water sources or other similar working conditions.

Background technique

The breathing valve is usually a safety vent valve installed on the top of the storage tank to maintain the normal pressure in the tank. Its working principle is to use the weight of the breathing valve disc itself or the spring deformation force acting on the valve disc to The thrust generated by the difference works in balance.

For self-spraying sealed water wells, the gauge pressure at the wellhead is about 0.1MPa. When the water pump is started to pump water, due to the well head seal, the pressure in the well may become negative pressure again, which will cause the pump inlet to be evacuated. In addition, when starting the water pump to pump water, it is necessary to monitor the liquid level in the well. When the static pressure liquid level gauge measures the liquid level in the well, if the liquid level gauge is not connected to the atmosphere, the liquid level indication will be inaccurate due to the pressure change in the well. When the water level of the water well is high, the liquid level gauge indicates that the water volume is insufficient. However, if the direct emptying port connects the sealed wellhead to the atmosphere, when the pump stops pumping water, due to the increase in the pressure in the well, the well water will be ejected from the emptying port under pressure, and if the height of the emptying nozzle is raised High to more than 10 meters, when the winter temperature is lower than 0 ℃, the water in the emptying pipe will freeze, and it will not be able to communicate with the atmosphere.

Contents of the invention

In view of this, the purpose of this utility model is to provide a self-operated breathing valve installed at the wellhead to solve the problem that the self-spraying sealed water well is pumped out and the well water level is difficult to measure accurately.

In order to achieve the above object, the utility model adopts the following technical solutions:

A self-operated breathing valve, comprising an upper valve cover, a lower valve cover, a valve body and a piston. The cover and the lower valve cover are respectively provided with an upper opening and a lower opening connecting the inner chamber of the breathing valve with the outside world, and one end of the lower opening protruding into the inner cavity of the breathing valve is provided with a balance hole, and the piston is arranged in the inner cavity of the breathing valve. Inside, and can move between the upper valve cover and the lower valve cover along the inner wall of the valve, a protruding part is provided on the side of the piston, and the protruding part has a plurality of openings.

Preferably, a sealing ring surrounding the upper opening is further provided at the lower end of the upper valve cover.

Preferably, the lower end of the piston is provided with an annular compensating end, and the compensating end clings to and seals the lower opening when the piston moves down.

Preferably, the upper end of the upper valve cover is further provided with a water outlet communicating with the upper opening, and the water outlet is trumpet-shaped.

It can be seen from the above technical solution that the self-operated breathing valve provided by the utility model has a piston that can move up and down in the valve body. When pumping water, the breathing valve is opened to communicate the inside of the well with the outside, thereby effectively solving the problem of pumping out of the well when pumping water. phenomenon, and the liquid level in the well can also be accurately measured. When the pressure in the well rises, the breathing valve is closed to prevent the well water from spraying out. In addition, a trumpet-shaped water outlet is provided on the breathing valve to collect a small amount of water brought out by the airflow before the piston is not sealed, thereby reducing the impact on the surrounding environment. The breathing valve provided by the utility model has simple overall structure and convenient maintenance.

Description of drawings

Fig. 1 is a schematic structural view of a preferred embodiment of the self-operated breathing valve provided by the present invention.

Detailed ways

The utility model will be described in detail below in conjunction with the accompanying drawings, but the utility model is not limited thereby.

FIG. 1 shows a self-operated breathing valve provided by the utility model, which includes a valve body 1 , an upper valve cover 2 , a lower valve cover 3 and a piston 4 .

Wherein, the valve body 1 has a hollow cylindrical shape, and the upper and lower ends of the cavity are respectively connected to the upper valve cover 2 and the lower valve cover 3, and the upper valve cover 2 and the lower valve cover 3 are fixed to the valve body 1 by bolts. Connect and seal, thereby forming the inner chamber 12 of the breathing valve in the valve body 1 . In addition, the upper valve cover 2 and the lower valve cover 3 are respectively provided with an upper opening 5 and a lower opening 6 which communicate the inner cavity 12 of the breathing valve with the outside, so that water or air can enter and exit the breathing valve. The end of the lower opening 6 protruding into the inner cavity 12 of the breathing valve is provided with a balance hole 9, which can keep the inner cavity 12 in communication with the outside when the lower opening 6 is sealed.

Preferably, the upper end of the upper valve cover 2 is also provided with a water outlet 7 communicating with the upper opening 5, and the water outlet 7 adopts a horn-shaped design for collecting a small amount of water brought out by the airflow before the piston is not sealed. , the water will be withdrawn when inhaling.

The piston 4 is a hollow cylindrical structure, and is arranged in the inner cavity 12 of the breathing valve. An annular protruding part is arranged on the side of the piston 4, and the protruding parts are respectively close to the upper and lower ends of the piston 4. The outer side of the chamber 12 is close to the circle, and the diameter is slightly smaller than the diameter of the inner cavity 12 of the breathing valve, so that a certain gap is left between the valve body 2 and the protruding part of the piston 4, which is convenient for the piston 4 to move up and down in the inner cavity 12 of the breathing valve. move. A plurality of openings 8 are also provided on the protrusion so that water and air can circulate in the inner cavity 12 . Wherein, the piston 4 can seal the upper opening 5 when moving upward, and can seal the lower opening 6 when moving downward.

Preferably, the lower end of the piston 4 is provided with a compensating end 10, and the compensating end 10 is ring-shaped, which can replace the lower end of the piston 4 in contact with the lower opening, so as to reduce the contact area, so that it is easy to ensure the smoothness and smoothness of the contact surface during processing. Flatness, so as to ensure sealing.

Preferably, a sealing ring 11 surrounding the upper opening 5 is also provided at the lower end of the upper valve cover 2, and the sealing ring 11 can be fixed on the lower end of the upper valve cover 2 by welding or threaded connection. Further, the The sealing ring 11 can be a plurality of sealing rings with different diameters, so as to better seal the upper opening 5 together with the upper end of the piston 4 .

The self-operated breathing valve provided by the utility model, when the pressure in the well is greater than the outside world, the piston moves upward under the buoyancy of the water, and at the same time, the gas in the well is discharged through the lower opening and the opening of the protruding part of the piston through the upper opening until the piston touches the upper valve The sealing ring of the cover, the piston tightly withstands the sealing ring under the pressure difference between the well and the outside to form a seal and prevent the well water from spraying out.

When pumping water, when the pressure in the well is low, the piston moves down under the action of its own gravity to seal the lower opening. At this time, the external air passes through the upper opening and the opening on the protruding part of the piston to maintain pressure balance with the well through the balance hole, thereby avoiding the pressure in the well. Evacuation occurs when pumping water, and the well water level can be accurately measured.

Claims (4)

1. a self-powering type inhalation valve is characterized in that, said self-powering type inhalation valve comprises bonnet, bottom flange, valve body and piston; The two ends up and down of said valve body connect bonnet and bottom flange respectively; And form the inhalation valve inner chamber, and being respectively equipped with the upper shed and the under shed that are communicated with the inhalation valve inner chamber and the external world on said bonnet and the bottom flange, the end that said under shed is charged in the inhalation valve inner chamber is provided with equalizing orifice; Said piston is arranged in the inhalation valve inner chamber; And can between bonnet and bottom flange, move along valve interior wall, be provided with protuberance in the side of said piston, have a plurality of perforates on the said protuberance.

2. inhalation valve as claimed in claim 1 is characterized in that, also is provided with the seal ring around upper shed in the lower end of said bonnet.

3. inhalation valve as claimed in claim 2 is characterized in that, the lower end of said piston is provided with ring-type compensation end, and said compensation end is close to when piston moves down and is sealed under shed.

4. inhalation valve as claimed in claim 3 is characterized in that the upper end of said bonnet also is provided with the water outlet that is communicated with upper shed, said water outlet flare.

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