US2183623A - Steam ejector - Google Patents

Description

Dec. 19, 1939. E. G. ROSS 2,133,623

STEAM EJECTOR Filed Aug. 20, 1938 2 Sheets-Sheet 1 ELMER G- Russ l VENTOR ATTORNEY 2 Sheets-Sheet 2 ELMEQ Q R058 ATTORNEY Dec. 19 1939. E. G. ROSS I STEAM EJECTOR Filed Aug. 20, 1958 R 5 m a w 0 l I. 7. 2 w 4 1 fl I 6 2 4 2 1i 9 W 3 \\\\\X\\\\\ m TLI ii I 1 I 2 5 l 3 2 5 E .i

Patented Dec. 19, 1939 UNITED STATES PATENT OFFICE STEAlVI EJECTOR ware Application August 20, 1938, Serial No. 225,878

4 Claims.

This invention relates to steam ejectors or steam jet exhausters, and an object of the present invention is to provide a steam jet exhauster which will withstand the erosive action of wet steam and the corrosive action of acid and other chemical vapors and fluids.

Another object of the invention is to provide an ejector or steam jet eXhauster having a diffuser of vitreous material such as glass or the like, and to provide a novel structure for mounting the vitreous difiuser in its carrying body or shell so as to permit the difiuser to be readily assembled or disassembled and connected to the nozzle carrying head of the ejector as a complete unit.

Another object of the invention is to provide in a steam jet exhauster as specified a structure which will compensate for the difference in the coeflicient of heat expansion of the vitreous diffuser and its metal shell.

With these and other objects in view, as may appear from the accompanying specification, the invention consists of various features of construction and combination of parts, which will be first described in connection with the accompanying drawings, showing a steam ejector embodying the invention, and the features forming the invention will be specifically pointed out in the claims.

In the drawings:

Figure l is a longitudinal section through the improved steam ejector.

Figure 2 is a cross-section taken on the line 2-2 of Figure 1.

Figure 3 is an end view of the discharge end of the ejector.

Figure 4 is a longitudinal section of a modified form of the diffuser structure.

Figure 5 is a cross-section on the line 55 of Figure 4.

Referring more particularly to the drawings, the improved steam ejector or steam jet eX- hauster comprises the inlet head I, which discharges into the diffuser 2, and through which the nozzle 3 projects. The nozzle 3 discharges into the diffuser 2 at the inlet thereof as is usual in the construction of steam ejectors or exhausters.

The present invention relates wholly to the difiuser structure, and it includes a metal shell 4 which has an annular flange 5 on its inlet end for attachment to the outlet end of the head I. A vitreous diffuser B is positioned within the shell 4 and forms the diifuser passage of the ejector or exhauster. The glass difiuser 6 is securely held in place within the shell 4 by means of a holding sleeve '5 at its inlet end and a holding plate at its discharge end. The holding sleeve 3 is provided with an inturned flange 9 which engages a gasket ill placed over the inlet end of the vitreous diffuser 6. The sleeve I has an out-turned annular flange ll formed thereon which rests in a recess 52 in the face of the flange The flange H is attached to the flange E by cap screws M, so that the tightening of the cap screws 54 in place will urge the inturned flange 9 towards the end of the diffuser 6.

The outlet end of the shell 4 has a recess 15 cut therein which receives the holding plate 8. A gasket It engages the holding plate 8 and the discharge end of the diffuser 6, so that when the plate 8 is securely attached to the shell 4 by means of the cap screws I! the diffuser 6 will be tightly clamped in position in the shell 4 forming a complete unitary diffuser structure which is attached to the head I by means of suitable bolts (not shown).

The gaskets I0 and I6 are of yieldable material and of sufficient thickness to compensate for the difference in the coeflicient of heat expansion of the vitreous dilfuser 6 and the metal shell 4.

In Figures 4 and 5 of the drawings a modified form of the diffuser structure is shown which difiers only slightly from the preferred form illustrated in Figure 1. In this modified construction the diffuser structure 2 includes the metal shell 4' having the flange 5 at its inlet end, which flange serves as means of attachment of the diffuser to the head I. The vitreous diifuser 6 has its inlet end engaged by a holding sleeve 7'. The holding sleeve 1 has an inturned annular flange 9 which engages the gasket l0 over the inlet end of the diffuser 6'. The flange H of the holding sleeve 1 fits in a recess l2 in the face of the flange 5. However, it is not attached to the shell 4 by means of cap screws or the like, as is the sleeve 1 in Figures 1 to 3.

A holding plate 29 is provided, which is attached to the annular attaching flange 2! on the outlet end of the shell 4. The plate 20 is of the same diameter as the flange 2i, and a gasket 22 is placed between the holding plate 20 and the flange 2!, and it has an inturned annular portion 23 which engages about the outer surface of the diffuser B at its outlet end. When the holding plate 2! is securely clamped in place or securely connected to the flange 2|, it forces the inlet end of the diffuser 6 firmly against the gasket I0 and the inturned flange 9'. Such forcing action also forces the flange ll securely against the gasket 2 and the attaching flange 25 of the head i, thus securely holding the vitreous diffuser 6' in its proper position in the shell 4 and providing a complete unitary diffuser structure which may be attached to or detached from the head I as a unit.

It will be understood that the invention is not to be limited to the specific construction or arrangement of parts shown but that they may be widely modified within the invention defined by the claims.

What is claimed is:

1. In a steam jet exhauster, a metal diffuser shell, a head, a vitreous diffuser in said shell and being entirely free from any direct contact with the shell, and clamping means carried by said shell and engaging said diffuser for holding it in place in the shell.

2. In a steam jet exhauster, a metal diffuser shell, a head, a vitreous difiuser in said shell and being entirely free from any direct connection with the shell, clamping rings carried by said shell and engaging said diffuser for holding it in place in the shell, and yieldable gaskets be- 3. In a steam jet exhauster, a metal difiuser shell, 2. head, a vitreous diffuser in said shell and being entirely free from any direct connection with the shell, a clamping ring having an out-turned flange detachably connected to the shell and an inturned flange engaging the inlet end of said vitreous difiuser, and a clamping plate detachably carried by said shell and engaging the outlet end of the vitreous difiuser whereby said diffuser will be held in place within said shell by said clamping rings without contact with the shell.

4. In a steam jet exhauster, a metal diffuser shell, a head, a vitreous diffuser in said shell and projecting upwardly into said head, said shell provided with an annular groove at its end connected to said head, a holding sleeve at the inlet end of the vitreous diffuser and having an out-turned flange engaging in the roove in said shell, said holding sleeve having an inturned flange at its end remote from said outturned flange and a yieldable gasket between said in-turned flange and the inlet end of said vitreous diffuser for yieldably holding the diffuser in place, and means attached to said shell and engaging the outlet end of the vitreous difiuser.

ELMER, G. ROSS.

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