Bottom cover type pipeline intake and exhaust valve

Abstract

The invention discloses a bottom cover type pipeline intake and exhaust valve. An air distribution protective cover (13) is arranged at the bottom of the inner side of a valve body (11), a water inlet(14) is formed in the bottom end of the air distribution protective cover (13), a supporting leg (15) is arranged on the outer side of the water inlet (14), an arc-shaped air guide plate (16) is arranged at the other end of the supporting leg (15), a fence (17) connected with the bottom of the air distribution protective cover (13) is arranged on the outer side of the air guide plate (16), a connector (18) connected with a lower flange (19) is arranged on the fence (17), and a floating ball and a sealing gasket can achieve intake and exhaust functions. Compared with the prior art, a special bottom cover is arranged, the upper part of the floating ball is open, air intake and exhaust are particularly rapid and smooth, moreover, the floating ball is not easily affected by impurities in water and corrosion and can move very flexibly, therefore, the working reliability and practicability of the intake and exhaust valve are guaranteed, the service life of the intake and exhaust valve is greatly prolonged, and the structure is simpler.

Description

technical field [0001] The invention relates to a pipeline valve, in particular to a bottom cover type pipeline inlet and exhaust valve. Background technique [0002] There is often air inside facilities such as water pipelines or containers. Under the joint action of water flow and air flow, pipe bursts often occur. In addition, many water pipelines use PVC pipes. When the water is too large, due to the Under the action of negative pressure, it is easy to flatten the pipeline, deform or break it, and these are prone to large-scale water outages, which not only affect people's normal life, but also consume a lot of manpower and material resources for emergency repairs, which are normal. The water supply has brought a big problem. The Chinese invention patent application publication number CN 206093156 U discloses a "pipeline automatic intake and exhaust valve". Ball, a semi-circular float gland is set above the float, a gasket is set between the valve cover and the upper fl...

AI Technical Summary

Problems solved by technology

[0002] There is often air inside facilities such as water pipelines or containers. Under the joint action of water flow and air flow, pipe bursts often occur. In addition, many water pipelines use PVC pipes. When the water is too large, due to the Under the action of negative pressure, it is easy to flatten the pipeline, deform or break it, and these are prone to large-scale water outages, which not only affect people's normal life, but also consume a lot of manpower and material resources for emergency repairs, which are normal. The water supply has brought a big problem. The Chinese invention patent application publication number CN 206093156 U discloses a "pipeline automatic intake and exhaust valve". Ball, a semi-circular float gland is set above the float, a gasket is set between the valve cover and the upper flange, a gasket middle hole is set in the middle of the gasket, and the periphery of the float outer barrel There is a fence hole in the outer barrel of the float, and a bottom hole in the outer barrel of the float is provided at the bottom of the outer barrel of the float. Not only can the gas in the pipeline be released quickly through the fence hole of the outer barrel of the float, but also the gas in the pipeline When it is less, it can also be vented from time to time through the secondary exhaust hole in the middle of the elastic sleeve, and it can also be quickly inhaled when the pipeline generates negative pressure to prevent deformation and rupture of the water delivery pipeline, and the reliability is also stronger, but This kind of "pipeline automatic intake and exhaust valve" has the problems of slow intake and exhaust speed and poor intake and exhaust during actual use. When the air pressure in the pipeline is too large or the negative pressure is too large, it cannot work well. Solve the problem. In addition, after a period of use, impurities and corrosion in the water tend to accumulate in the inner sleeve of the guide tube and the inner barrel of the floating ball, causing the floating ball and the floating ball gland to move up and down flexibly, making the intake and exhaust exhaust useless, and the reliability is poor. short life

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