Extended coverage dry pendent storage sprinkler for a large storage freezer

Patent metadata

Field	Value
Publication number	US-11241598-B2
Application number	US-201615775683-A
Country	US
Kind code	B2
Filing date	Nov 14, 2016
Priority date	Nov 11, 2015
Publication date	Feb 8, 2022
Grant date	Feb 8, 2022

Abstract

A dry sprinkler has a casing tube having an inlet orifice and an outlet orifice. When the sprinkler is in a non-actuated state, an inlet seal assembly operatively seals the inlet orifice and an outlet seat assembly operatively seals the outlet orifice. A translating member extends through the casing tube between an inlet and an outlet. The translating member axially translates from a first position, in which the translating member retains the inlet seal assembly in a sealed state, to a second position, in which the translating member releases the inlet seal assembly, toward the outlet when the outlet seat assembly is released. The sprinkler has a nominal K-factor greater than 17 gpm/(psi)1/2. In addition, a difference between a cross-sectional area of the casing tube and a cross-sectional area bounded by an outer perimeter of the translating member is more than 30% of the cross-sectional area of the casing tube.

First claim

What is claimed is:

1. An arrangement of extended coverage dry pendent storage sprinklers for a storage freezer, the storage freezer having a top and a freezing environment within the storage freezer, the arrangement of dry pendent storage sprinklers comprising:
a plurality of dry pendent storage sprinklers, each dry pendent storage sprinkler penetrating through the top of the storage freezer into the freezing environment and each dry pendent storage sprinkler comprising:
(A) a casing tube having an inlet end at a first end, the inlet defining an inlet orifice, and an outlet end at a second end, the outlet defining an outlet orifice, the casing tube defining a liquid passage and a sprinkler axis from the inlet to the outlet;
(B) an inlet seal assembly configured to operatively seal the inlet orifice when the sprinkler is in a non-actuated state;
(C) a sprinkler head connected to the outlet end of the casing tube, the sprinkler head comprising:
(a) a deflector; and
(b) a frame supporting the deflector, and having a connector machined into the frame, the connector (i) securing the sprinkler head to the outlet end of the casing tube, and (ii) defining the outlet orifice that faces the deflector to deliver liquid to the deflector upon actuation of the sprinkler;

(D) a translating member extending from the inlet to the outlet through the casing tube, the translating member being one of a tube and a solid rod, and including a proximal pin at the inlet end of the casing tube and a distal pin at the outlet end of the casing tube, and the translating member (i) supporting the inlet seal assembly by the proximal pin to seal the inlet orifice, and (ii) being configured to axially translate from a first position, in which the translating member retains the inlet seal assembly in a sealed state, to a second position, in which the translating member releases the inlet seal assembly upon actuation of the dry pendent storage sprinkler;
(E) an inlet support adjacent to the inlet orifice at the inlet end of the casing tube, the inlet support extending from the translating member to the casing tube to support the translating member when the sprinkler is in the non-actuated state, wherein the inlet support is a yoke formed by several rods, each rod having one end secured to the translating member and an opposite end projecting at an outward angle away from the translating member in an upstream direction towards the inlet orifice of the casing tube; and
(F) an outlet support adjacent to the outlet orifice along an axis that is perpendicular to a longitudinal axis of the translating member and supporting the translating member when the sprinkler is in the non-actuated state,
wherein a difference between an internal cross-sectional area of the casing tube and a cross-sectional area bounded by an outer perimeter of the translating member is more than 30% of the internal cross-sectional area of the casing tube,
wherein the translating member (i) has a constant outer diameter between the inlet support and the outlet support, (ii) has a cross-sectional area that occupies at least 2% of, and not more than 65% of, the internal cross-sectional area of the casing tube, (iii) is supported by the inlet support and the outlet support in the first position, and (iv) is arranged to axially translate toward the outlet upon being released by the outlet support upon actuation of the dry pendent storage sprinkler, and
wherein each dry pendent storage sprinkler has a nominal K-factor greater than 16.8 gpm/(psi) 1/2 and a coverage area of greater than 10.22 square meters, with a maximum spacing in the arrangement exceeding 9.29 square meters per sprinkler.

2. The arrangement of dry pendent storage sprinklers according to claim 1 , wherein the outlet support of each sprinkler is a saddle attached to the translating member.

3. The arrangement of dry pendent storage sprinklers according to claim 1 , wherein the nominal K-factor of each sprinkler is equal to or greater than 22.4 gpm/(psi) 1/2 .

4. The arrangement of dry pendent storage sprinklers according to claim 1 , wherein the coverage area of each sprinkler is at least 13.38 square meters.

5. The arrangement of dry pendent storage sprinklers according to claim 1 , wherein the coverage area of each sprinkler is up to 18.209 square meters.

6. The arrangement of dry pendent storage sprinklers according to claim 1 , wherein the inlet orifice and the outlet orifice of each sprinkler communicate with a volume interior of the casing tube and an exterior of the translating member.

7. The arrangement of dry pendent storage sprinklers according to claim 6 , wherein the casing tube of each sprinkler has an average outer diameter of at least 38.1 mm.

8. The arrangement of dry pendent storage sprinklers according to claim 6 , wherein the casing tube of each sprinkler has an average outer diameter of 38.1 to 63.5 mm.

9. The arrangement of dry pendent storage sprinklers according to claim 6 , wherein the casing tube of each sprinkler has an average inner diameter that is at least 5.08 mm greater than an average outer diameter of the translating member.

10. The arrangement of dry pendent storage sprinklers according to claim 1 , wherein the translating member of each sprinkler axially translates toward the outlet upon being released by the outlet support for actuation of the sprinkler such that the liquid is caused to flow around the translating member.

11. The arrangement of dry pendent storage sprinklers according to claim 10 , wherein the liquid is caused to flow between the translating member and the casing tube of each sprinkler.

Assignees

• Reliable Automatic Sprinkler Co Inc

Inventors

• Polan George S

Classifications

• A62C37/12

  with fusible links · CPC title

• A62C35/62 Primary

  dry, i.e. empty of extinguishing material when not in use · CPC title

• A62C3/004

  for freezing warehouses and storages · CPC title