Upright fire protection nozzle
AssigneeGrinnell Corporation
InventorsMichael A. Fischer, David J. Leblanc
Life of this patent
Estimating the term…
Abstract
An upright-type fire protection water spray mist nozzle has a base defining an orifice through which fire-retardant fluid can flow, an inlet section having an upstream end and defining a conduit for flow of fire-retardant fluid along a orifice axis and leading to an upstream end of the orifice, with a diffuser element defining an impingement surface that is at least substantially imperforate in an axial direction and positioned for impingement by a stream of fire-retardant fluid flowing from the orifice in a stream direction along the orifice axis, the diffuser element being positioned generally above a horizontal plane through a downstream end of the orifice.
Claims35
An upright-type fire protection spray mist nozzle, comprising:
- a base defining an orifice, with an orifice axis, through which fire-retardant fluid can flow;
- an inlet section having an upstream end and defining a conduit for flow of fire-retardant fluid along said orifice axis and leading to an upstream end of said orifice;
- and
- a diffuser element positioned coaxially downstream of said orifice, said diffuser element defining an impingement surface that is at least substantially imperforate in an axial direction and positioned for impingement by a stream of fire-retardant fluid flowing from said orifice in a stream direction along said axis, said impingement surface comprising:
- a central conical shape surface region extending generally toward said orifice, with an apex portion disposed along said axis,
- a peripheral edge disposed generally radially outward from said conical shape surface region and defining a face plane, and
- a concave, substantially toroidal surface region generally between said conical shape surface region and said peripheral edge.
An upright-type fire protection spray mist nozzle, comprising:
- a base defining an orifice, with an orifice axis, through which fire-retardant fluid can flow;
- an inlet section having an upstream end and defining a conduit for flow of fire-retardant fluid along said orifice axis and leading to an upstream end of said orifice;
- and
- a diffuser element positioned coaxially downstream of said orifice, said diffuser element defining an impingement surface that is at least substantially imperforate in an axial direction and positioned for impingement by a stream of fire-retardant fluid flowing from said orifice in a stream direction along said axis, said impingement surface shaped to divert fire-retardant fluid in said stream to flow from said axis radially outward, along said impingement surface, towards a region of a peripheral edge of said impingement surface, said impingement surface adapted to substantially redirect said flow of fire-retardant fluid from said stream by at least 90° from said stream direction while maintaining said flow of fire-retardant fluid towards said region of said peripheral edge substantially in contact with said impingement surface in a manner to substantially avoid splashing.
An upright-type fire protection spray mist nozzle, comprising:
- a base defining an orifice, with an orifice axis, through which fire-retardant fluid can flow;
- an inlet section having an upstream end and defining a conduit for flow of fire-retardant fluid along said orifice axis and leading to an upstream end of said orifice;
- and
- a diffuser element positioned coaxially downstream of said orifice, said diffuser element defining an impingement surface that is at least substantially imperforate in an axial direction and positioned for impingement by a stream of fire-retardant fluid flowing from said orifice in a stream direction along said axis, said impingement surface comprising a central conical shape surface region extending generally toward said orifice, with an apex portion disposed along said axis, a peripheral edge disposed generally radially outward from said conical shape surface region, and a concave, substantially toroidal surface region generally between said conical shape surface region and said peripheral edge, said impingement surface being shaped to divert fire-retardant fluid in said stream to flow from said axis radially outward, along said impingement surface, towards a region of a peripheral edge of said impingement surface, said impingement surface being adapted to redirect said flow of fire-retardant fluid from said stream by at least 90° from said stream direction while maintaining said flow of fire-retardant fluid towards said region of said peripheral edge substantially in contact with said impingement surface in a manner to substantially avoid splashing.
An upright-type fire protection spray mist nozzle, comprising:
- a base defining an orifice, with an orifice axis, through which fire-retardant fluid can flow;
- an inlet section having an upstream end and defining a conduit for flow of fire-retardant fluid along said orifice axis and leading to an upstream end of said orifice;
- and
- a diffuser element defining an impingement surface that is at least substantially imperforate in an axial direction and positioned for impingement by a stream of fire-retardant fluid flowing from said orifice in a stream direction along said axis, said diffuser element being positioned generally above a horizontal plane through a downstream end of said orifice.
An upright-type fire protection spray mist nozzle that discharges a spray of fire-retardant fluid over an area to be protected from fire, said spray being characterized by a Dv90 droplet size diameter of less than about 250 microns when measured at a pressure of a 175 psi at the inlet to the nozzle, in accordance with the procedure recommended in the 2000 edition of the NFPA 750 Standard on Water Mist Fire Protection Systems.
An upright-type fire protection spray mist nozzle, comprising:
- a base defining an orifice, with an orifice axis, through which fire-retardant fluid can flow;
- an inlet section having an upstream end and defining a conduit for flow of fire-retardant fluid along said orifice axis and leading to an upstream end of said orifice;
- and
- a diffuser element defining an impingement surface that is at least substantially imperforate in an axial direction and positioned for impingement by a stream of fire-retardant fluid flowing from said orifice in a stream direction along said axis;
- said diffuser element being positioned generally above a horizontal plane through a downstream end of said orifice;
- and
- said orifice having an orifice diameter preferably less than about 0.200 inch.
Dependencies are inferred from the claim text.