HOT GAS FLOW RATE CONTROL VALVE Russian patent published in 2019 - IPC F16K5/04 F16K5/10 F16K5/12 

FIELD: machine building.

SUBSTANCE: invention relates to machine building and is aimed at creation of valves for controlling flow of hot gas, operating at high pressures and temperatures. Valve for hot gas flow rate control consists of a casing with inlet and outlet branch pipes and a shutter. Said outlet branch pipe accommodates saddle with flow port, adjacent seat and gate surfaces are made in the form of cylinders with common axis, constant annular gap is made between adjacent cylindrical surfaces of seat and shutter, body is protected from inside by sleeves from heat-proof erosion-resistant material. Shaft is installed in rolling bearings, flap is installed through bushing from heat-shielding material on shaft, axis of which coincides with common axis of adjacent cylindrical surfaces of seat and flap, wherein shutter on both sides by means of metal bushings, connected by means of thread with shaft, is installed on shaft and connected to it by means of pins, which are located in installation area of metal bushings. Shutter on both sides is located inside bushings from heat-shielding erosion-resistant material, between cylindrical inner surface of bushings and outer cylindrical surface of shutter is annular gap, wherein inner surface of sleeve from heat-proof erosion-resistant material is made in stepped shape, and outer cylindrical surface of shutter, located inside bushing, is also made in stepped form, at that, the cylindrical surface of the shutter located closer to the gate edge is made with smaller diameter, and in the annular gap the graphite rings are installed in series, wherein graphite ring located closer to sleeve, touches sleeve and is installed relative to shutter with annular gap, and the graphite ring located closer to the flap recess touches the shutter and is installed relative to the bushing with the annular gap.

EFFECT: purpose of the invention is to increase the valve operating reliability for hot gas flow rate control.

6 cl, 5 dwg