CN202284718U

CN202284718U - Device for preventing gas from over-limit of negative pressure

Info

Publication number: CN202284718U
Application number: CN2011202504207U
Authority: CN
Inventors: 王志望
Original assignee: Individual
Current assignee: Individual
Priority date: 2011-07-07
Filing date: 2011-07-07
Publication date: 2012-06-27
Anticipated expiration: 2021-07-07

Abstract

The utility model discloses a device for preventing gas from the over-limit of negative pressure, comprising a large chamber, a small chamber and a ventilation tube. The device is characterized in that the small chamber is higher than the large chamber and disposed in or outside the large chamber, and the ventilation tube is disposed on the lower part or the side surface or the top end of the large chamber; a protective cover capable of preventing a liquid from washing away and preventing dust, insects, impurities and the like from entering, as well as convenient to supplement water in a valve body is disposed on the upper part of the small chamber; and the large chamber or the small chamber is made from a transparent material. The device is simple in structure, low in cost and convenient in installation. The device is suitable for being used for preventing the over-limit of negative pressure or preventing the over-limit of positive pressure and negative pressure in gas storage and gas production devices such as gas storage cabinet and biogas pool.

Description

The anti-negative pressure of a kind of gas device that transfinites

Affiliated technical field

The anti-negative pressure of a kind of gas container that the relates to the utility model anti-negative pressure of valve body, especially biogas gas holder and the biomass pool device that transfinites that transfinites.

Background technique

Air storage, aerogenesis equipment such as biogas gas holder and biomass pool all have certain pressure load design, and gas holder is on the exhaust, safety valve, and biomass pool makes the interior pressure limit of equipment within the specific limits, thereby avoids superpressure that equipment is damaged effect on the water pressure safety valve.Gas holder, biomass pool can produce negative pressure under situation such as operate miss or equipment pipe damage, negative pressure surpasses the equipment limit value and possibly damage equipment, need prevent to produce.Gas holder, the anti-ultra negative pressure of biomass pool are designed with two kinds; The one, in the air inlet of equipment or outlet pipe, threeway is installed; When estimating to produce negative pressure, open the valve in the threeway, let in the equipment and atmosphere, this method can not be prevented operate miss and contingency; The 2nd, anti-negative pressure device is installed, and the negative pressure that restriction produces is low more good more, this method can round-the-clock anti-suction function, is optimum scheme.Existing negative pressure of vacuum safety valve has this function, but costs an arm and a leg, and every price is at four, 5,000 yuan more than.If adopt the inhalation valve of mechanical structure, promptly utilize weight valve or spring valve, there is proportional relation through these two kinds of positive negative pressure of valve of test, negative pressure that malleation is high is also high, and negative pressure is low, and malleation will be leaked gas, and does not reach the designing requirement of lower negative pressure, high malleation.Chinese patent ZL200820224808.8 " a kind of PNPB control valve unit that prevents ", a side of this patent big chamber in valve body has vertical dividing plate, and valve body is separated out a capacitor, and the gap is left in the capacitor bottom, communicates with big chamber; Suction tude (function is ventilation) and liquid entering hole are arranged on the top of big chamber, and there is pressure gauge at the middle part, and liquid discharging valve is arranged at the bottom; Upper outside at capacitor has bleeder pipe, and level meter is equipped with in middle and lower part, the outside; With liquid is medium, can realize the requirement of lower negative pressure, high malleation.But the invalid volume of big chamber in the device occupies major part, is the waste of material, and structure is too complicated, and cost is high.

Summary of the invention

In order to overcome the defective of the anti-negative pressure valve of existing gas, the utility model provides the anti-negative pressure of a kind of gas device that transfinites, and the anti-negative pressure of this gas device that transfinites has greatly dwindled the invalid volume of big chamber, and is simple in structure, cheap.

The utility model solves the technological scheme that its technical problem adopted: comprise big chamber, capacitor, breathing pipe, capacitor is higher than big chamber, and the capacitor bottom is located in the big chamber or the outside, and breathing pipe is located at big chamber bottom or side or top.

The capacitor top is provided with protective housing, and the protective housing bottom is suitable for reading equal with capacitor, and the opposite side of protective housing bottom is provided with the pipe with atmosphere, and there is capacitor angle suitable for reading dorsad the pipe upper end, and there is grid the lower end of pipe.Be furnished with aperture around the top, side of another kind of protective housing, the aperture gross area is equal to or greater than capacitor internal diameter cross-section area.Take at the bottom of the protective housing with capacitor and flexibly connect.

Big chamber or capacitor are made with transparent material.

The beneficial effect of the utility model is: (1) has reduced big chamber height significantly, and simple in structure, favourable reduction cost; (2) protective housing on capacitor top has the liquid of preventing and is rushed out and produce becomes flat (if equipment air pressure is higher than the anti-negative pressure device that transfinites), anti-dust insect foreign material etc. and go into interiorly, convenient to open the capacitor water that in valve body, adds suitable for reading with functions such as salt, and exempts to establish the filler; (3) big chamber or capacitor are transparent material, are convenient to pinpoint the problems at any time, accomplish timely moisturizing and thaw with salt.

Description of drawings

Below in conjunction with accompanying drawing and embodiment the utility model is described further.

Fig. 1 is first kind of embodiment's of the utility model a sectional view.

Fig. 2 is second kind of embodiment's of the utility model a sectional view.

1. breathing pipes in the drawings, 2. big chamber, 3. capacitor, 4. ring retaining, 5. socketed pipe, 6. protective housing, 7. pipe, 8. grid, pipe, 10. aperture 9. are spirally connected.

Embodiment

In Fig. 1, be first kind of embodiment, comprise big chamber (2), capacitor (3), breathing pipe (1), capacitor (3) is higher than big chamber (2), and capacitor (3) bottom is located in the big chamber (2), and breathing pipe (1) is located at big chamber (2) bottom.

Protective housing (6) is arranged at capacitor (3) top; Protective housing (6) bottom is suitable for reading equal with capacitor (3); The opposite side of protective housing (6) bottom is provided with the pipe (7) with atmosphere; There is capacitor (3) angle suitable for reading dorsad pipe (7) upper end, and the lower end mouth of pipe (7) has grid (8), and there are socketed pipe (5) and capacitor (3) socket protective housing (6) end.

In Fig. 2, be second kind of embodiment, breathing pipe (1) is located at big chamber (2) one side middle and upper parts, and capacitor (3) is located at the opposite side bottom of big chamber (2).

Be furnished with aperture (10) around protective housing (6) top, side, aperture (10) gross area is equal to or greater than capacitor (3) internal diameter cross-section area, and protective housing (6) end pipe (9) that is spirally connected is threaded with capacitor (3).

In Fig. 1, Fig. 2, big chamber (2) or capacitor (3) are transparent material.

The working principle of the utility model is: the utility model is installed near the three-way pipe of outlet pipe gas holder or the biomass pool; When the gas that is got into big chamber by breathing pipe produces malleation; The gas of big chamber is with the liquid pressed downward; Because capacitor top and atmosphere, the air pressure in the big chamber surpasses barometric pressure, so the liquid in the big chamber just is pressed towards capacitor; The malleation design of the utility model generally is slightly larger than the design pressure of gas holder, biomass pool, so neither can increase equipment air pressure, and the liquid in the valve body is not washed out.If the design of original equipment air pressure is too high, also can the utility model malleation be reduced (promptly reducing the capacitor height), when reducing the equipment negative pressure, also play reduction equipment air pressure like this.When negative pressure appears in the gas holder that connects breathing pipe or biomass pool; The big chamber that is connected also produces negative pressure simultaneously; Because the air pressure of big chamber is lower than barometric pressure; Therefore the liquid in the capacitor is just by the big chamber of whole suctions, and extraneous gas gets into gas holder or biomass pool through pipe or aperture, protective housing, capacitor, big chamber, breathing pipe then, makes in negative pressure is limited in very among a small circle.During the winter temperature subzero, can be anti-freeze with salt in valve.

Claims

1. the anti-negative pressure of the gas device that transfinites comprises big chamber, capacitor, breathing pipe, it is characterized in that capacitor is higher than big chamber, and the capacitor bottom is located in the big chamber or the outside, and breathing pipe is located at big chamber bottom or side or top.

2. the anti-negative pressure of the gas device that transfinites according to claim 1; It is characterized in that said capacitor top is provided with protective housing; Suitable for reading equal with capacitor at the bottom of the protective housing, the opposite side of protective housing bottom is provided with the pipe with atmosphere, and there is capacitor angle suitable for reading dorsad the pipe upper end; There is grid the lower end of pipe, takes at the bottom of the protective housing with capacitor to flexibly connect.

3. the anti-negative pressure of the gas device that transfinites according to claim 1 is characterized in that being furnished with aperture around the top, side of said protective housing, and the aperture gross area is equal to or greater than capacitor internal diameter cross-section area.

4. like the anti-negative pressure of claim 2 or the 3 said gases device that transfinites, it is characterized in that said big chamber or capacitor are transparent material.