Automatic reversing valve

Abstract

The invention discloses a four-way reversing valve which comprises an upper end cover, a lower end cover and a valve spool. The upper end cover is provided with gas inlets and fume outlets, and the gas inlets and the fume outlets are respectively communicated with external gas pipelines and external fume exhaust pipes; the lower end cover is provided with gas outlets and fume inlets, the gas outlets and the fume inlets are respectively communicated with pipelines on a heat accumulator, and gas and fume are respectively filled into the heat accumulator and exhausted from the heat accumulator via the gas outlets and the fume inlets; the valve spool capable of rotating relatively is arranged between the upper end cover and the lower end cover, and a plurality of through holes which are peripherally symmetrically arranged are formed in the valve spool, and are respectively correspondingly communicated with the gas inlets and the fume outlets in the upper end cover and the gas outlets and the fume inlets in the lower end cover under the relative rotation action of the valve spool, so that circulation of the filled gas and circulation of the exhausted fume are automatically switched in the heat accumulator. The four-way reversing valve has the advantages that the valve spool can be periodically communicated with channels in a valve body, fluid channels can be automatically switched over, the fluid channel switching frequency is variable, and the four-way reversing valve is excellent in sealing performance and low in switching impact.

Description

technical field [0001] The invention belongs to the field of regenerative combustion furnaces, and in particular relates to a reversing valve for regenerative combustion furnaces, which is used for automatically switching and conducting the air entering the combustion furnace and the exhausted flue gas. Background technique [0002] Regenerative heating furnace is essentially a combination of high-efficiency regenerative heat exchanger and conventional heating furnace. It is mainly composed of heating furnace body, regenerator, reversing system, fuel, air supply and smoke exhaust system. The regenerator is the main body of waste heat recovery from the flue gas of the regenerative heating furnace. It is a chamber-shaped space filled with the regenerator and is a part of the flue gas and air flow channel. In the heating furnace, the regenerators are always used in pairs, and one furnace can use one pair, or several pairs, or even dozens of pairs. [0003] When the regenerativ...

AI Technical Summary

Problems solved by technology

Since the switching process of the two fluids of ignition and smoke in the three-way valve is instantaneous switching, it is easy to cause the gas in the channel to collide with the valve core baffle, and in the valve, the two kinds of gas switch frequently, which even causes the valve body to be damaged. damage

Moreover, the seal between the spool baffle and the valve body is a line seal, and the sealing effect is not good.

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