# US 10,480,344 B2 · Valve module, and steam turbine and power generation system including the same > Agents: this data is available as JSON from the patentgrep API and MCP server — see https://patentgrep.com/llms.txt - Number: US 10,480,344 B2 - Document ID: US10480344B2 - Status: Granted - Kind: B2 - Application number: 15/950,196 - Filed: 2018-04-11 - Published: 2018-11-22 - Granted: 2019-11-19 - Earliest claimed: 2017-05-16 - Assignees: Doosan Heavy Industries Construction Co., Ltd - Applicants: Doosan Heavy Industries & Construction Co., Ltd. - Inventors: Hyunchul Lee - Web page: https://patentgrep.com/patent/US10480344B2 ## CPC - F01D 17/145: {by means of valves, e.g. for steam turbines (valves in general F16K)} - F01D 21/00: Shutting-down of machines or engines, e.g. in emergency; Regulating, controlling, or safety means not otherwise provided for - F16K 1/443: {the seats being in series} - F16K 3/0227: {Packings} - F16K 3/0281: {Guillotine or blade-type valves, e.g. no passage through the valve member} - F16K 3/314: Forms or constructions of slides; Attachment of the slide to the spindle - F16K 31/56: without stable intermediate position, e.g. with snap action - F22B 37/02: applicable to more than one kind or type of steam boiler - F05D 2220/31: in steam turbines - F01D: NON-POSITIVE DISPLACEMENT MACHINES OR ENGINES, e.g. STEAM TURBINES (machines or engines for liquids F03; non-positive displacement pumps F04D) - F16K: VALVES; TAPS; COCKS; ACTUATING-FLOATS; DEVICES FOR VENTING OR AERATING {(devices for emptying and evacuating the excess liquid in valves or conduits F16L55/07)} - F22B: METHODS OF STEAM GENERATION; STEAM BOILERS - F05D: INDEXING SCHEME FOR ASPECTS RELATING TO NON-POSITIVE-DISPLACEMENT MACHINES OR ENGINES, GAS-TURBINES OR JET-PROPULSION PLANTS ## Abstract A valve module is provided in a steam turbine and a power generation system. The valve module includes a stop valve, a control valve, and a case. The stop valve includes a stem to reciprocate rectilinearly between a first position and a second position, a stop valve disc mounted to an upper portion of the stem, to pass fluid when the stem is in the first position and to block fluid flow when the stem is in the second position, and a sealing member surrounding the stem and configured to prevent exposure of the stem when the stop valve disc is located at the first position. The valve module is capable of protecting a stem from high-pressure fluid that is introduced to the stop valve. ## Claims ### Claim 1 A valve module comprising a case enclosing a flow space into which fluid is introduced; a control valve disposed in the flow space and configured to control an amount of the fluid flowing through the flow space; and a stop valve disposed in the flow space below the control valve, the stop valve including: a stem configured to reciprocate rectilinearly between a first position and a second position, a stop valve disc mounted to an upper portion of the stem and configured to pass fluid when the stem is in the first position and to block fluid flow when the stem is in the second position, the stop valve disc including a bottom side having an inner circumference and an inward lip extending from the inner circumference at an inclination angle and terminating at a distal end, and a sealing member surrounding the stem and configured to prevent exposure of the stem when the stop valve disc is located at the first position, the sealing member including a protruding portion extending upward and flaring outward at the inclination angle of the inward lip, the protruding portion terminating at a distal end that meets the distal end of the inward lip when the stop valve disc is located in the first position. ### Claim 2 (depends on 1) The valve module according to claim 1, wherein the stop valve disc is disposed in an upward location according to vertical movement of the stem into the first position and is disposed in a downward location according to vertical movement of the stem into the second position. ### Claim 3 (depends on 1) The valve module according to claim 1, wherein the sealing member is formed of a material having greater toughness than a material of the stem. ### Claim 4 (depends on 1) The valve module according to claim 1, wherein the stop valve disc has a receiving recess formed in the bottom side to receive the sealing member. ### Claim 5 (depends on 4) The valve module according to claim 4, wherein the distal end of the protruding portion of the sealing member and the distal end of the inward lip of the stop valve disc engage with each other when the stop valve disc is in the first position to prevent fluid from entering the receiving recess through the bottom side of the stop valve disc. ### Claim 6 (depends on 1) The valve module according to claim 1, wherein the stop valve disc has an insertion recess formed in the bottom side to receive the protruding portion when the stem is in the second position. ### Claim 7 (depends on 1) The valve module according to claim 1, wherein the sealing member comprises a guide portion (3213b) formed at an upper end of the sealing member, the guide portion having a concavely curved shape in order to guide fluid in a downward direction when the stop valve disc is located at the first position. ### Claim 8 (depends on 7) The valve module according to claim 7, wherein, below the guide portion, the sealing member has an outer diameter that gradually increases in the downward direction. ### Claim 9 (depends on 1) The valve module according to claim 1, wherein the case comprises a valve seat on which the stop valve disc is seated in order to block a flow passage of fluid, the valve seat comprising: a convex portion facing the stop valve and an inclined surface that is flat and is inclined downwardly in order to guide fluid introduced into a fluid space formed between the valve seat and the stop valve disc, the flat inclined surface forming part of the convex portion and facing a surface formed by the inward lip of the stop valve disc and the protruding portion of the sealing member when the stop valve disc is in the first position. ### Claim 10 (depends on 9) The valve module according to claim 9, wherein the inclined surface is inclined at an angle ranging from 40° to 50° with respect to a horizontal line that extends from an upper end of the valve seat. ### Claim 11 (depends on 1) The valve module according to claim 1, wherein the flow space has an elliptical shape. ### Claim 12 (depends on 1) The valve module according to claim 1, wherein the control valve comprises: a rod configured to reciprocate rectilinearly in a vertical direction; and a control valve disc mounted to a lower portion of the rod and configured to control the fluid flow amount according to movement of the rod, the control valve disc including a lower portion for guiding the fluid in a downward direction, the control valve disc having an outer diameter of the lower portion that gradually decreases in the downward direction, and wherein the guided fluid flows over the outer diameter of the control valve disc to pass the stop valve disc when the stop valve disc is located at the first position. ### Claim 13 (depends on 12) The valve module according to claim 12, wherein the control valve disc has a bottom side and a receiving recess in which an upper end portion of the stop valve disc and an upper end portion of the stem are received through the bottom side. ### Claim 14 (depends on 1) The valve module according to claim 1, wherein the inward lip of the stop valve disc includes a first inclined surface having one end communicating with the distal end of the inward lip, and the protruding portion of the sealing member includes a second inclined surface having one end communicating with the distal end of the protruding portion; and wherein, when the stop valve disc is located in the first position, the first and second inclined surfaces are aligned with each other and face a flow of the fluid passing the stop valve disc. ### Claim 15 (depends on 14) The valve module according to claim 14, wherein the control valve comprises a control valve disc mounted to a rectilinearly reciprocating rod and configured to control the fluid flow amount according to movement of the rod, the control valve disc including a lower portion for guiding the fluid in a downward direction, the control valve disc having an outer diameter of the lower portion that gradually decreases in the downward direction to form a combined surface with the first and second inclined surfaces so that, when the stop valve disc is located at the first position, the fluid guided in the downward direction flows smoothly over the outer diameter of the control valve disc and the first and second inclined surfaces. ### Claim 16 (depends on 14) The valve module according to claim 14, further comprising a valve seat on which the stop valve disc is seated in order to block a flow passage of fluid, the valve seat including a flat surface that faces the stop valve and is inclined at an angle substantially parallel to the first and second inclined surfaces. ### Claim 17 (depends on 1) The valve module according to claim 1, wherein the control valve has an outer diameter over which the controlled amount of the fluid flows. ### Claim 18 A steam turbine comprising a turbine including a rotor equipped with a plurality of turbine blades and a turbine housing for accommodating the rotor, the turbine housing having a fluid inlet and a fluid outlet; and a valve module mounted to the fluid inlet of the turbine, the valve module comprising a case enclosing a flow space into which fluid is introduced; a control valve disposed in the flow space and configured to control an amount of the fluid flowing through the flow space; and a stop valve disposed in the flow space below the control valve, the stop valve including: a stem configured to reciprocate rectilinearly between a first position and a second position, a stop valve disc mounted to an upper portion of the stem and configured to pass fluid when the stem is in the first position and to block fluid flow when the stem is in the second position, the stop valve disc including a bottom side having an inner circumference and an inward lip extending from the inner circumference at an inclination angle and terminating at a distal end, and a sealing member surrounding the stem and configured to prevent exposure of the stem when the stop valve disc is located at the first position, the sealing member including a protruding portion extending upward and flaring outward at the inclination angle of the inward lip, the protruding portion terminating at a distal end that meets the distal end of the inward lip when the stop valve disc is located in the first position. ### Claim 19 A power generation system comprising: a boiler configured to heat fluid to a high temperature; a supply pipe connected to the boiler and configured to transfer fluid; and a steam turbine configured to be rotated by fluid supplied thereto via the supply pipe so as to generate drive force, the steam turbine including a turbine and a valve module mounted to the turbine, wherein the valve module comprises a case enclosing a flow space into which fluid is introduced; a control valve disposed in the flow space and configured to control an amount of the fluid flowing through the flow space; and a stop valve disposed in the flow space below the control valve, the stop valve including: a stem configured to reciprocate rectilinearly between a first position and a second position, a stop valve disc mounted to an upper portion of the stem and configured to pass fluid when the stem is in the first position and to block fluid flow when the stem is in the second position, the stop valve disc including a bottom side having an inner circumference and an inward lip extending from the inner circumference at an inclination angle and terminating at a distal end, and a sealing member surrounding the stem and configured to prevent exposure of the stem when the stop valve disc is located at the first position, the sealing member including a protruding portion extending upward and flaring outward at the inclination angle of the inward lip, the protruding portion terminating at a distal end that meets the distal end of the inward lip when the stop valve disc is located in the first position. ### Claim 20 (depends on 19) The power generation system according to claim 19, further comprising a fluid circulation line configured to circulate fluid discharged from the steam turbine, the fluid circulation line comprising: a first circulation line configured to allow fluid discharged from the steam turbine to undergo heat exchange in a recuperator; a second circulation line configured to allow fluid that has undergone heat exchange in the recuperator to be condensed in an air-cooled condenser; a third circulation line configured to allow fluid condensed in the air-cooled condenser to be compressed by a main pump; a fourth circulation line configured to allow fluid compressed by the main pump to undergo heat exchange in the recuperator; and a fifth circulation line configured to allow fluid that has undergone heat exchange in the recuperator to be reheated in the boiler.