New composite high-speed exhaust intake valve

Abstract

The invention discloses a novel combined type high-speed exhausting air inlet valve. The novel combined type high-speed exhausting air inlet valve is provided with a valve body, a valve cover and a floating ball. The novel combined type high-speed exhausting air inlet valve is characterized in that the floating ball is a spherical floating body, a lifting cover with large guiding length is arranged above the floating ball, the specific gravity of the lifting cover is smaller than that of the floating ball, and an inner frustum hole matched with the floating ball is formed in the bottom of the lifting cover; a floating ball cover is arranged outside the floating ball and the lifting cover, and a flow deflector with a plurality of spiral guide vanes is arranged on the bottom of the floating ball cover; an exhausting function detection device is arranged at the appropriate height of a valve cylinder. According to the novel combined type high-speed exhausting air inlet valve, the requirement for installation perpendicularity is lowered; the situation that a large amount of water is sprayed out of a large exhausting hole is effectively prevented, and the exhausting function can be conveniently detected at any time.

Description

technical field [0001] The invention relates to an intake and exhaust valve, in particular to a composite high-speed exhaust and intake valve in a water supply and drainage pipeline. Background technique [0002] In order to improve the delivery efficiency and prevent the delivery pipeline from being damaged due to negative pressure, the composite high-speed exhaust and intake valve (hereinafter referred to as the exhaust valve) is widely used in water delivery pipelines, and is generally installed at the highest point of the pipeline or where air is easy to accumulate. Location. There are many structural types of exhaust valves, among which the integral exhaust valve disclosed in CN200420103028X patent and the split exhaust valve disclosed in CN103470836 patent have been listed as typical structures by the national standard, but these valves have the following problems: 1) cannot If it is used on a pipeline with a slightly larger inclination (for example > 2°), if the v...

AI Technical Summary

Problems solved by technology

There are many structural types of exhaust valves, among which the integral exhaust valve disclosed in CN200420103028X patent and the split exhaust valve disclosed in CN103470836 patent have been listed as typical structures by the national standard, but these valves have the following problems: 1) cannot If it is used on a pipeline with a slightly larger inclination (for example > 2°), if the verticality deviation of the exhaust valve is large after installation, the buoyancy direction is inconsistent with the direction required to seal the large and small exhaust holes, although the lifting cover or The floating ball has added a guiding mechanism, but due to the large matching gap between the kinematic pairs, especially the short guiding length of the floating ball, they are easy to contact with the inner wall of the corresponding hole when they rise, resulting in skewing, or due to the size of the vent hole. The valve seat and the valve disc cannot be accurately aligned, resulting in unreliable sealing and water leakage. Therefore, the national standard stipulates that the installation verticality of the exhaust valve should be <2°, which increases the difficulty of installation and pipeline laying; some exhaust valves are for To solve the above problems, a long cylinder float is used, which solves the sealing problem of the small vent hole, but increases the height of the valve, which requires a relatively high underground well; 2) when the water is supplied again after the initial or pipeline system maintenance , when the exhaust is finished and water enters the exhaust valve, because the water channel in the valve is narrow and the flow velocity is high, and the rising speed of the lifting cover cannot keep up, a large amount of water will be exhausted from the large exhaust hole before the large exhaust hole is closed. 3) Since the transported water inevitably contains trace impurities, it will affect the exhaust function after a long period of use, such as causing the small vent hole to be blocked; there are also small vent holes The rubber on the surface is prone to denaturation over time, and "sticks" to the float, resulting in loss of exhaust function

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