Free floating ball type drain valve

Abstract

The invention discloses a free floating ball type drain valve. The drain valve comprises a valve body, a floating ball, a valve bonnet, a valve seat, a valve seat cover, an adjusting screw and a stainless steel cylinder, wherein the valve body is provided with an input port and an output port, the floating ball is arranged in the valve body, the valve bonnet is arranged on the upper portion of the valve body, the valve seat, the valve seat cover and the adjusting screw are arranged on the lower portion of the valve body, a plurality of through holes with the diameters of 0.7-1mm are uniformly distributed on the wall of the stainless steel cylinder, the stainless steel cylinder is positioned in the valve body and shields the input port of the valve body, the floating ball is positioned in the stainless steel cylinder, and an arched circular arc shaped groove is arranged on the upper portion of the inner wall of the input port of the valve body. The drain valve overcomes the defects of a traditional drain valve, sealing and filtering effects of the floating ball and a valve seat opening are guaranteed, the service life of the drain valve is prolonged, normal operation of the drain valve and steam-using equipment is guaranteed, and heat exchange efficiency and energy-saving effect are improved.

Description

technical field [0001] The invention relates to a free float type steam trap. Background technique [0002] The free float trap mainly includes a valve body with input and output ports, a hemispherical filter, a float, a valve cover on the upper part of the valve body, a valve seat, a seat cover and an adjusting screw on the lower part of the valve body, etc. Composition, the inner wall of the input and output port of the valve body is basically a horizontal plane, the floating ball and the hemispherical filter are located in the valve body, and the hemispherical filter is set above the floating ball; When condensed water is generated in the steam conveying pipe network and steam-using equipment, the floating ball rises, and the valve opens to discharge the condensed water. [0003] Usually, the hemispherical filter screen of the traditional free floating ball trap is composed of steel wire mesh and stainless steel hemispherical plate. The stainless steel hemispherical ...

AI Technical Summary

Problems solved by technology

[0003] Usually, the hemispherical filter screen of the traditional free floating ball trap is composed of steel wire mesh and stainless steel hemispherical plate. The stainless steel hemispherical plate is distributed with a number of 5mm diameter holes. The steel wire mesh is woven with steel wire, and then the steel wire mesh is covered on the stainless steel hemisphere Shaped plate, welded by argon arc welding, and then the hemispherical filter screen is fixed above the floating ball inside the valve body by the inner hole circlip, so as to play a filtering role; the steel wire mesh is generally corroded after half a year of use, due to the stainless steel hemisphere The diameter of the hole on the shape plate is 5mm, and the corroded steel wire residue falls into the bottom of the valve body through the hole of the stainless steel hemispherical plate, so that the floating ball and the valve seat cannot be sealed, resulting in waste of steam; Without the filtering effect, garbage will also enter the inside of the trap, which will cause blockage of the valve seat, resulting in steam leakage, and even non-discharge of condensed water, which greatly reduces the service life of the free float trap

[0004] In addition, because the inner wall of the inlet pipeline of the valve body is too horizontal, the cross section between the inner wall of the inlet pipeline of the valve body and the inner wall of the valve body is relatively small. Due to the limitations of the small space and the small cross-section between the inner wall of the valve body inlet pipeline and the inner wall of the valve body, the steam in the valve body cannot flow back out of the valve body along the pipeline in time, so that the problem of air blockage is very easy to occur, that is, there is a certain pressure There is no place for the steam to be discharged in the valve body, so that the valve body is filled with steam at a certain pressure, so that the condensed water in the pipeline cannot enter the valve body smoothly, and the steam trap will not work, until the sealed steam in the valve body is gradually cooled to condensed water After the pressure drops, the condensed water in the pipeline will enter the valve body again, and the steam trap will start to work. This will cause the steam trap to stop working intermittently and not discharge the condensed water, which will affect the heat exchange efficiency of the steam-consuming equipment and even damage the steam-using equipment. equipment, and the steam sealed inside the valve body is wasted, which affects the energy saving effect

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