US2671692A

US2671692A - Nozzle construction

Info

Publication number: US2671692A
Application number: US187729A
Authority: US
Inventors: Chester A Matirko
Original assignee: Basic Refractories Inc
Current assignee: Basic Refractories Inc
Priority date: 1950-09-30
Filing date: 1950-09-30
Publication date: 1954-03-09
Anticipated expiration: 1971-03-09

Description

C. A. MATIRKO NOZZLE CONSI'RUCTION Filed Sept. 30, 1950 mwsmon 0/5; 2-5/2 4 MA 7/2/40 JTTOQNEXT March 9, 1954 Patented Mar. 9, 1954 2 NOZZLE CONSTRUCTION Chester a. Matirko, Tiiiln, om, assignor to Basic Refractories, Inc., Cleveland, Ohiofa corporation of Ohio Application September 30, 1950, Serial No. 187,729

8 Claims. l

Projecting cement material by air has been known for a long time, and various nozzle constructions have been used having provision to add water. There is no particular difliculty with finely ground and slow-setting material. To admix water and project granular material, such as fumace-lining refractory compositions into place as for instance on a wall, involves more particular and critical conditions. Such compositions may include coarse and flne particles in mixture, and include quick-plasticizing adhesive agents when water is added, and there must be a thorough and uniform intermixing of water in such cases to give immediate development of adhesiveness in included plasticizing and setting agents if the material projected onto a furnace wall is to stick, or after having been applied is not to slump ofi in places. In accordance with the present invention a construction is had which makes possible the satisfactory applying of refractory compositions in the various exigencies of furnace lining and repairing conditions, cold or hot. Other objects and advantages of the invention will appear from the following description.

To the accomplishment of the foregoing and related ends, the invention, then, comprises the features hereinafter fully described and particularly pointed out in the claims, the following description and the annexed drawing setting forth in detail certain illustrative embodiments of the invention, these being indicative, however, of but a few of the various ways in which the principle of the invention may be employed.

In said annexed drawing:

Fig. 1 is an end elevational view of the inlet end of a nozzle construction in accordance with the invention; and

Fig. 2 is a longitudinal sectional view taken on a plane substantially indicated by line 11-11, Fig. 1.

In general, the construction involves a body 1' or housing having an extension screw-threaded internally, and an inwardly directed flange which provides abutments. And enclosed within the housing is a cylindrical ring having on its outer periphery a circumferential flange which coacts with the housing and provides a partition, to form two passages, and provide a small clearance at the periphery of such partitioning flange for predetermined flow from the rear passage to the forward passage, inclined openings being arranged in the cylindrical ring leading from the forward passage to the lumen of the nomle. And, at the rear, the housing is closed and the cylindrical ring held by a closure ring having a screw-threaded extension to receive the granular material supply connection.

Thus, as shown in the drawing, the body or housing 2 has an extension 3 internally threaded, and within the housing and spaced from its wall is the cylindrical ring 4 which has on its outer periphery aflange I. This flange divides the annular space in the body into a rear passage A and a forward passage L. The outer periphery of the flange] is spaced from the inner periphery of the housing by a small clearance providing communication from passage A to passage L at the outer periphery. Preferably, a set of two or more interchangeable rings is used providing different clearances, as for example 0.02", 0.03", etc., so that the operator may apply the one most suitable for the particular material to be projected. From the passage L a plurality of distributed openings 6 generally 3 to 12 lead preferably at an incline in a forward direction toward the axial center of the nozzle. The cylindrical ring 4 seats by its foreward edge against a gasket 8, and at its other or rear edge the cylindrical ringis against a gasket 9 which extends peripherally to also seal the housing by the closure-ring II which is held to the body by a plurality of cap screws II. The closure-ring it has an extension l2 which is internally screwthreaded to receive the granular feed supply connection. An inlet I3 is provided for pressure-air and by a duct it this communicates to the annular passage A which is formed between the closure-ring II and the outwardly projecting flange 6 on the cylindrical ring 4. At the outlet end is a projector pipe and while this may be a plain pipe of desired length screwed into outlet 3, with or without an adapter bushing, it is preferred to have a liner of rubber-like character It, and this, in the form of a tube, has a cuff ll turned back outwardly as supported by a metal sleeve It which has an integral ring 20; and the assembled resilient liner and support tube may thus be set into place in the extension 3. Then a screw-threaded bushing is screwed into the extension holds the liner and tube in assembly. This construction is found to result in a smooth and correct fitting of the cuff without damage within the housing extension.

For introduction of liquid, water or chemical solution to promote plasticizing or setting, liquid inlet 22, Fig. 1, is provided at a point spaced from the air inlet [3. This spacing assures an emcient distribution. The liquid inlet 22 communicates by an opening 23 to the passage L. It is noticed that the air under high pressure leaves the passage A in the form or a thin annular stream at the outer periphery of the flange 5, and is turned in by the outer wall of the passage to give a violent churning action with the liquid being supplied in passage L, the direction im- 3 posed by the initial jetting along the outer wall of the passage L causing an especially fine division or misting of the liquid before escaping through the openings L- A very finely divided and especially uniform condition of the liquid and a uniform distribution into the stream of granular material flowing through the lumen of the nozzle is found to result.

The manner of operation is understood from the foregoing. The granular composition supplied into the lumen of the nozzle through the extension I! proceeds to the series of openings 6 where it is thoroughly intermixed with the misted or very finely divided liquid as injected through the openings 6.

Other modes of applying the principle of the invention may be employed, change being made as regards the detafls described, provided the features stated in any of the following claims, or the equivalent of such, be employed.

I therefore particularly point out and distinctly claim as my invention:

1. In a nozzle for projecting granular material, a housing with an outlet extension which is internally threaded, a cylindrical ring having an outwardly-directed flange on its periphery and seating within the housing with the 'flange spaced by a small clearance from the inner periphery of the housing, the flange separating rear and forward annular passages, a plurality of holes through the ring from the forward passage angularly directed toward the center axis, an inlet for pressure-air to said rear passage, an inlet for liquid leading to the forward passage, a gasket sealing the edge of said cylindrical ring against the housing, a ring and holding means for closing against said cylindrical ring and housing and having an internally threaded extension, a gasket between the closure ring and the housing, a bushing to engage in the housing outlet extension, a tubular rubber-like lining therewithin, a tubular metal sleeve to support said lining externally and project within a back-turned cufl on the end of the lining adjacent the housing, and a metal ring secured to said sleeve between the edge of such cufl and said bushing.

2. In a nozzle for projecting granular material, a housing with an outlet extension which is internally threaded, a cylindrical ring having an outwardly-directed flange on its periphery and seating within the housing with the flange spaced by a small clearance from the inner periphery of the housing, the flange separating rear and forward annular passages, a plurality of holes through the ring from the forward passage angularly directed toward the center axis,

an inlet for pressure-air to said rear passage,-

an inlet for liquid to the forward passage, a gasket sealing the edge of said cylindrical ring against the housing, a ring and holding means for closing against said cylindrical ring and housing and having an internally threaded extension, a gasket between the closure ring and the housing, a rubber-like tubular liner, a bushing to engage in the housing extension and having a tubular portion to protect the rubber-like liner externally and project within a backtumed cuif on the end of the lining adjacent the housing, and a metal ring between the edge of such cuif and said bushing.

3. In a nozzle for projecting granular material, a housing with an outlet extension which is internally threaded, a cylindrical ring having 4 mi outwardly-directed flange on an periphery and seating within the housing with the flange spaced by a small clearance from the inner periphery of the housing, the flange separating rear and forward annular passages, a plurality of holes through the ring from the forward passage angularly directed toward the center axis, an inlet for pressure-air to said rear passage, an inlet for liquid to the forward passage, a gasket sealing one edge of said ring against the housing, a ring and holding means for closins against said cylindrical ring and housing and having an internally threaded extension, and a gasket between the closure ring and the nozzle and adjacent edge of the cylindrical ring.

4. In a nozzle for projecting granular materials, a housing with an outlet extension which is internally threaded, a cylindrical ring having an outwardly-directed flange on its periphery and seating within the housing with the flange spaced by a small clearance from the inner periphery of the housing, the flange separating rear and forward annular passages, a plurality of holes through the ring from the forward passage angularly directed toward the center axis,

inlet connections for pressure-air and for liquid to the rear and forward passages respectively, a gasket sealing the edge of said ring against the housing, a ring and holding means for closing against said cylindrical ring and housing and having an internally threaded extension, and a gasket between the closure ring and housing and adjacent edge of the cylindrical ring.

5. In a nozzle for projecting granular materials, a housing with an outlet extension which is internally threaded, a cylindrical ring with combined means for partitioning two annular passages within the wall of the housing and for providing discharge from the rear passage along the inside wall of the housing into the forward passage, said means comprising an outwardlydirected flange on the periphery of the cylindrical ring leaving a small clearance all around, holes through the ring from the forward passage convergently toward the outlet, means for inlet of pressure-air and for liquid to the rear and forward passages respectively, and a closure ring for completing the rear passage and holding said cylindrical ring.

6. In a nozzle for projecting granular materials, a housing with inlet and outlet in axial alignment, acylindrical ring within said housing having afiange on its periphery dividing off a forward annular passage and a rear annular passage but leaving a small clearance all around, means for inlet of gaseous pressure into said rear passage, means for inlet of liquid into said forward passage, and inclined openings from the forward passage convergently through said rin toward the outlet.

CHESTER A. MATIRKO.

References Cited in the file of this patent UNITED STATES PATENTS