Stop valve and steam turbine

Patent metadata

Field	Value
Publication number	US-10677085-B2
Application number	US-201616064857-A
Country	US
Kind code	B2
Filing date	Feb 26, 2016
Priority date	Feb 26, 2016
Publication date	Jun 9, 2020
Grant date	Jun 9, 2020

Abstract

A stop valve includes: a valve seat in a fluid flow path; a valve disc that contacts the valve seat and that closes the fluid flow path; a valve stem that extends along a center axis includes a first end, in a direction of the center axis, that is connected to the valve disc; a spindle that extends along the center axis and comprises an end surface of a first end, in the direction of the center axis, that faces an end surface of a second end of the valve stem, in the direction of the center axis; and a connector that connects the second end of the valve stem to the first end of the spindle.

First claim

What is claimed is:

1. A stop valve, comprising:
a valve seat in a fluid flow path;
a valve disc that contacts the valve seat and that closes the fluid flow path;
a valve stem that extends along a center axis and comprises a first end, in a direction of the center axis, that is connected to the valve disc;
a spindle that extends along the center axis and comprises an end surface of a first end, in the direction of the center axis, that faces an end surface of a second end of the valve stem, in the direction of the center axis; and
a connector that connects the second end of the valve stem to the first end of the spindle,
wherein the valve stem comprises a valve rod-side engaged recession recessed in a radial direction about the center axis,
wherein the spindle includes a core rod-side engaged recession recessed in the radial direction,
wherein the connector includes:
a coupler divided in a circumferential direction about the center axis into a plurality of couplings, each comprising:
a valve rod-side engagement protrusion that engages with the valve rod-side engaged recession; and
a core rod-side engagement protrusion that engages with the core rod-side engaged recession, on an inner peripheral surface of the coupling; and

a cover, that is tube-shaped, accommodates the plurality of couplings therein, and restricts movements of the plurality of couplings in an outward radial direction,

wherein the cover includes a contact surface that abuts the plurality of couplings in the direction of the center axis,
wherein the connector further includes a restraint that restricts a movement of the cover in the direction of the center axis when the contact surface abuts the plurality of couplings,
wherein each of the plurality of couplings further comprises a third protrusion that protrudes beyond the cover in the direction of the center axis,
wherein the third protrusion comprises a ring groove that is annularly formed around the center axis and is recessed in the radial direction, and
wherein the restraint is a snap ring that engages with the ring groove from the outward radial direction.

2. A steam turbine, comprising:
the stop valve according to claim 1 ; and
a turbine main body which is driven by steam supplied from the flow path which is opened and closed by the stop valve.

Assignees

• Mitsubishi Heavy Ind Compressor Corp

Inventors

• Morimoto Makio

Classifications

• F16K31/1221

  one side of the piston being spring-loaded · CPC title

• F16K1/32 Primary

  Details (details of more general applicability F16K25/00 - F16K51/00) · CPC title

• F01D17/00 Primary

  Regulating or controlling by varying flow (for reversing F01D1/30; by varying rotor-blade position F01D7/00; specially for starting F01D19/00; shutting-down F01D21/00; regulating or controlling in general G05 {; specially adapted for hand-held tools or the like F01D15/06}) · CPC title

• F16K1/04

  with a cut-off member rigid with the spindle, e.g. main valves · CPC title

• F05D2210/12

  gaseous, i.e. compressible · CPC title