US1480248A - Ash gate - Google Patents

Description

jan. 8 192,4. mmm@ F. H. DUNBAR ASH GATE Filed March 5, 1925 2 Shee'bs8heet l Jan. 8 i924.

F. HfDUNBAR ASH GATE 2 Sheets-Sheet 2 Filed March 5, 1923 dan. ti, i924.

Application led March 5,

To aZZ whom t may concern Be it known that I, FRANK H. DUNBAR, a citizen of the United States, residing at Cleveland, in the county of Cuyahoga and s State of Ohio, have invented a certain new and useful `improvement in Ash Gates, of which the following is a full, clear, and exact description, reference being had to the accompanying drawings.

This invention relates to closures for hoppers and is particularly adapted to hoppers for receiving ashes or other loose material.

In the usual practice ash hoppers are designed to hold the hot ashes until they can be discharged in suitable transporting devices by opening the door of a gate construction beneath the discharge opening. In order to quench the hot ashes to prevent ythem from injuring the walls-of the hopper and Stoker parts considerable water is sprayed .on them. Itis desirable therefore to remove this water in a satisfactory and eiiicient manner.

An object of my invention is to provide a door for such hoppers which will at all times receive and discharge easily and quickly all such liquid without allowing it to escape and fall in undesirable places.

- A further object of the invention is to pro- `3o vide a simple and etiicient means for keeping the passages for conducting the water from becoming obstructed b settling of the fine sediment and materia carried along with the water.

Another object of the invention is to provide the closure mechanism with liquid conducting passages so arranged that the material carried along with the water cannot settle in certain passages and mechanism is 4o provided for positively removing the material from the other passages. v

These and other objects will be appa-rent from the following description and attached drawings forming a part of this application.

ln the accompanying drawings forming a part of this application, l

Figure 1 is a section on line 1--1, Fig. 2, showing the door in plan.

Fig. 2 is a vertical section taken on line 5o 2f-2, F ig. l.

Fig. 3 is an elevation showing thetracks in section as indicated by line 3 3. Fig. 1.

Fig. d is a vertical Section of the bottom of the hopper and door on line 4=--4, Fig. 1`

renne n; runnen, or onnvm., emo.

asn GATE.

3.A Surroundingthe discharge opening of the hopper is agate construction comprising a frame and a door, the frame e comprising sides 4 and ends 4". The frame is supported from the hopper by any suitable means such as angle iron 5 to which the frame is bolted. v

The sides 4 of the frame are preferably of channel construction, each having a ver`- tical web 6 and flanges 7 and 8 projecting outwardly, the lower ianges 7 forming tracks on which thedoor is suspended for movement as described hereinafter. The sides 4C are provided also on the inside with anges 9 on which the lower edges of the refractory material rests. The door 10 is carried by arms 11 to which are attached rollers 12 to run on the anges? of the frame. The door is reciprocated to open and closed position by any suitable mechanism such as a door operating piston and cylinder, the pistonrod bein shown at 10. Adjacent the ends of the rame sides Lli, suitable track extensions 13 are secured uponA which the door is carried during opening and closing movements.

Along the sides and preferably one end of the door are suitable channels or troughs 14 and 15 for carrying of the liquid which comes through the material in the hopper. These may be attached to or made integral with the door. The side troughs le, 15 are substantially horizontal and underlie the flange 9 of the frame, there being sufficient clearance provided, however, between the inner flange of the trough and the extremity of the flange 9 to permit the water to escape outwardly easily but preventing any large material from passing through. ln order to loo direct the water into the trough and prevent its being forced entirely over the edge of the door, a suitable rib may extend downwardly from the flange 9 orthe outer flange 16 of the trough mav be made higher than the T105 space between the inner ianve of the trough and the opposing flange 9 of the frame.

The front end of the door is preferably provided with a trough 17, the bottom of which is relatively sharply inclined so that the line sediment and material which is carried along with the water cannot deposit in the trough as when the slope is relatively gradual. The trough of course would cease to function if it became full of sediment,V

and the water at the front of the door would simply escape over the edge. The trough 17 may slope continuously from one side to the other but preferably is designed to slope to both side troughs from a midpoint. This construction gives the same fall as the single slope and in half the width of the door so it is much more eiective in causing the water to run quickly to the side troughs, thus preventing the trough 17 from filling up. The trough is also curved. to direct the liquid into the side troughs 14, 15 at an angle less than a right angle.

The side troughs 14, 15 preferably are substantially horizontal as I do not depend upon the flow of liquid to keep them clean. I provide a positive means to remove their contents every time the door is moved. This means consists of plows or scrapers 2() car ried by the frame or integral therewith which conform to the cross sectional shape of the troughs. The scrapers are designed to have sufficient clearance so that they will notinterfere with the movement of the door when opening or closing and yetwill remove substantially all the contents of the troughs when the door is moved to fully open position. The front ends of the troughs le and 15 are formed with inclined portions 21 eX- tending forwardly and upwardly to prevent leakage of water over the ends of the trough. They permit, however, any material which has collected in front of the scraper 20 when the door is closing'to pass out over the inclined end, thus preventing packing of the material against the ends 21 and permitting the door to be moved to fully closed position.

At the rear of the door and secured to the frame ais a fixed trough 25 which underlies the rear end of the door and receives the water from the side troughs 14, 15 and the rear end of the door, all of these being curved and lipped to deliver the water into the trough and prevent it from running back under the gate. The trough 25 has suitable discharge pipes 26 for conducting the liquid and sediment where desired.

yA suitable nozzle (diagrammatically indicated at 22) may be provided :for throwing streams of water in both directionsto 'positively clean the trough 17 when desired.

lWhile the gate construction has been shown herein as applied to an inwardly' sloping hopper and one having metal Walls lined with fire brick, '1t is to be understood that the gate mechanism is applicable to any 'the types et ash hoppers in use simply by adapting the frame and the door to the particular design. of hopper.

It will also be seen -that by providing a positive means for cleaning the side troughs at each movement oic the door I am enabled` to use a substantially horizontal side trough and to give the end or front trough on the door a slope corresponding to the entire depth of the door which is not possible where the sloping side troughs are used, thus enabling me to obtain a relatively steeper slope to the front trough or troughs.`

Furthermore, it is to be understood that the particular forms of apparatus shown and described, and. the particular procedure set forth, are presented for purposes of explanation and illustration and that various modifin cations of said apparatus and procedure can be made without departing from my invention as defined in the appended claims.

What I claim is:

1. The combination in a closure mechanism for bottom discharge hoppers, of a frame and a door reciprocable thereon, said door having ldrain troughs along its sides and means for scraping materiall from said side troughs upon relative movement of said door and said means.

2. The combination in a closure mechanism for bottom discharge hoppers, of a frame, a door reciprocable thereon, said door having troughs along its sides, means to prevent material from. falling into said troughs from the hopper and means to clean said troughs upon relative movement of the cleaning means and the door.

3. The combination with a hopper provided with a bottom discharge opening, of a frame surrounding said opening and provided Witli outturned flanges, a door having suspending means to reciprocate on said flanges to open and close said opening, said door having liquid carrying troughs along its sides, and means for removing material from said troughs upon relative movement of said door and said removing means.

4. A closure mechanism for bottom discharge hoppers comprising a frame, a door reciprocable thereon, said door having drain troughs along its sides, and means carried by the frame for scraping material from said side troughs when the door is moved.

5. A. closure mechanism for bottom discharge hoppers comprising a frame, a door reciprocable thereon, said door having drain troughs along its sides, and Scrapers com forming to the cross-sectionai shape o'l the troughs and projecting into said side troughs to prevent material in the trough from passing the scraper when the door is being opened. Y

6. A closure mechanism for a hopper having a bottom discharge opening comprising a trame having inwardly disposed iianges,

a door reciprocahle on the traine and havim ing drain troughs along its sides and disposed beneath said anges, means carried by the frame to scrape said side troughs when` the door is being operated, and means to prevent material' from packing behind tie scraper thus permitting the door to c ose.

7. A closure mechanism for a hopper having a bottom discharge opening comprising a frame having inwardly disposed anges, a door reciprocable on the frame and having drain troughs along its sides and disposed beneath said fianges, and means carried by the frame to scrape said side troughs when the door is being moved, said side troughs bein open at their forward ends and having the ottoms upwardly and outwardly inclined.y

8. The combination with a hopper provided with a bottom discharge opening, of'

a frame surrounding said opening, a door disposed betw'een portions of said frame and adapted to reciprocate thereon to close said opening, the front and sides of said door having drain troughs, the bottom of the front trough havin a relatively steep inclination and discharging into the side troughs, and means for removing material from said side troughs upon opening the door.

' 9. A closure mechanism for bottom discharge hoppers comprising a frame having webs and inner iianges,I a door reciprocable on the frame, said door having communicating troughs said troughs being disposed beneath said iianges and relatively close to the webs of said frame, means carried by the frame for receiving the liquid and materlal from said door, and means for scraping material on its front end and sides,l

from said side troughs upon relative movement of said door and said scraping means.

10. A- gate construction for a hopper having a bottom discharge opening, comprising' a frame having at its sides a vertical web and a flange disposed on each side thereof, a door reciprocable to open and close said opening, said door having troughs along the front and sides, the front trough having its bottom relatively steeply inclined, and means to clean the side troughs when the door isl opening.

11. The combination with a hopper provided With a bottom discharge openmg, of

a frame surrounding said opening, a doorI suspended therefrom and reciprocable thereon to open and close the discharge opening,

said door having drain troughs at the front and sides thereof, said frontl trough having its bottom sloping relatively steeply toward each side of the door to discharge into said side troughs, said side troughs being sub stantially horizontally disposed, and means for removing material from said troughs.

1n testimony whereof, I hereunto affix my signature.

FRANK H. DUNBAR.

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