US1676530A

US1676530A - Stopper

Info

Publication number: US1676530A
Authority: US
Publication date: 1928-07-10
Anticipated expiration: 1945-07-10

Description

1,616,530 J. DEWAR v CINDER NOTCH STOPPER July l0, 1928.

Filed Feb. 19, 1927 jaw/for fa/m65 gea/aff Patented July l0, 1928.

l JAMES DEWAR, OF CI-IICGQILLINOIS.

CINDER-NOTCH STOIPER.

Application led February 19, 1927. Serial No. 169,498.

My invention relates to a cinderv notch stopper for blast furnaces and has particu lar reference 4to a power operated `cinder notchstopper by means of which the cinder 5 notch is opened to allow the slag to flow out of the furnace, and also by means of which the stopper is 'inserted in the cinder notch opening without the necessity of inserting vthe stopperby hand or guiding it into position by-h'and, as has been the practice heretofore.

Another and further object of my invention is the provision of a cinder notch stopper which is positive in its operation' and which swings upward and backward'away from the cinder notch'opening out of the l pathof the heated slag, sparks, hot gases and the like which escape through the opening, and which can be easily and quickly inserted and which is ust as positive in its yoperation as far as the insertion of the plug in y the cinder notch is concerned, as it is in the opening, thus enabling the operator to quickly close the cinder notch stoppeipieven'ting the escape of gas or the molten slag.

I am aware that pow-er notch Stoppers have been in use before, .but their construction has been of such a character that they are not positive enough in their operation or quick enough in their application to positively'cut off the flow of slagthrough the cinder notch opening' should it occur, or else they bind in the monkey during the removal and insertion of the' stopper. In the early operation of blast furnaces these cinder notches were closed by arstopper mounted on the end of adolly bar and when it was desired to open the cinder notch the end of the dolly bar was struck with a Sledge, loosening the plug and the plug was then withdrawn by a workman. The opening of the cinder notch was a simple operation but the closing yof the notch was not so simplea'nd was also very dangerous because the'sparks, molten slag, hot gases and the like, being forced out through the cinder notch opening rendered the closing operation exceeedingly dangerous. Also, it was difhcult to locate the exact position of the opening for the insertion of the plug and the dolly bar,voften resulting in the loss of metal and taking the blast off the furnace,

orties.

In my improved apparatus I provide a dolly bar i'iaving a fixed guide at the rear end thereof, the upper end of wh ich engages a track which guides the dolly bar directly into the cinder notch opening in a substantial horizontal position w hen it is desired to close the opening after allowing the escape of the slag and cinderfrom the furnace.

These and other objects of my invention will be more fully and better understood by reference to the accompanying sheet of dravv*v ings, in Which:

rlhe figure is a side elevational view of my improved invention.

Referring now specifically to the drawing,

a blast furnace Wall 10 is shown having a cinder notch 11 therein which is closed by a large vfrusto-conical shaped cooler 12 and a smaller cooler'l inserted yinthe end of the large cooler 12, with a small cooler or cinder notch monkey 14: inserted in the cooler 12, the cinder notch monkey having yan ope-ning therethrough adapted to be closed by a hol'- low plug 15 mounted upon and in screwthreaded engagement with a pipe 15, which.

in turn is secured to a dolly barf16, the dolly bar 16, the'pipe 15'LL and the plug 15 all being in horizontal alignment with each other. The dolly 16 is'supported intermediate its ends by one leg 17 of an A-lever pivotally mounted at 1,8 upon a frame member 19, the other member 20 of the A-lever having a link 21 secured thereto which is connected to a cylinder 22 by a piston 23 which operates in the cylinder 22. der 22 has a pipe 23L The upper end of thecylinconnected thereto and the cinder not-ch opening.

A counterweight 25 is provided which is securedto the lever arm 20 by a cable 25 which assists in the opening of the cinder notch stopper andy also acts as a counterbalance against the Weight of the dolly bar in the closing operation.

At the rear end ofthe guide lever 27, the lower en dolly bar 16 is a d of this lever be# der.

ing vbent into alignment with the dolly bar 16 and secured thereto by a pair of rivets 28, so there is no relative movement between the arm 27 and the dolly bar 16, this guide lever being in efl'ect a continuation of the dolly bar 16. The upper end of the lever 27 has a link 29 secured thereto in the end of which a roller 30 is mounted which is adapted to engage upon a guide member 31 secured to the member 19 in any suitable manner, as by a pair of bolts or rivets 32. The lower end of the guide member 31 is slightly angularly disposed and extends backward and upward for a short distance and then is sharply curved upward for a considerable distance,l so that in the initial movement backward of the dolly bar on the opening of the cinder notch and for a distance of approximately two feet the dolly bar is moved substantially horizontal and thereafter the rear end of the dolly bar is caused to travel upwardly and vin a. somewhat circular direction in order to quickly draw the plug 15 out of the path of the cin- VVhen it is desired to insert the plug 15 in the cinder notch stopper, the reverse operation takes place, with the rear end of the dolly bar being dropped more rapidly than the forward end passes forward, the result be-ing that the dolly bar is very quickly placed in a horizontal position preparatory to entering the cinder notch, this form of they guidemember 31 enabling the dolly bar to be quickly drawn out of the path of the molten cinder and because of its particular shape making the positive insertion of thev plug into the cinder notch and easy and quick operation. The dolly bar 16 at thc outer end thereof has an enlarged head 33 thereon which is adapted to receive the blows from the sledge to loosen Vthe plug 15 should the stopper become frozen in the monkey 14.

'A trough 34 is provided having an upper portion 35 and a lower portion 36, the trough 34- having a pipe 37 connected to the bottom thereof which is secured to a second pipe 38 by means of a swinging oint 39, this pipe in turn leading to the pipe 15L and is connected to a smaller pipe running longitudinally inside of the pipe 15a by means of which a cooling fluid such as water is conveyed to the plug 15, this water being forced through the plug 15 and returning through the pipe 15a which is connected to an out-let pipe 40 which is connected to a second pipe 41v by a swinging joint fil-2, this construction being the ordinary common construction employed for the purpose of cooling cinder notch Stoppers.

The operation of the device is exceedingly simple in that when it is desired to open the monkey 14, pressure is admitted in the lower end of .thecylinder 22 through .the pipe 24 which exerts a force in a backward direction upon the. dolly bar 16 and pulls the plug 15 out of the monkey lain a horizontal direction. As the dolly bar travels backward it is raised a slight distance because of the travel of the A-lever and also by the elevation of the rear end of the dolly bar running on the track or guide 31. When the plug 15 is approximately two feet away from the cinder notch opening the curved portion of the guide carries the outer end of the dolly bar upward and at the same time it travels outward so the dolly bar and plug are moved away from and out of the path of the molten slag and hot gases through the cinder notch opening. When it is desired to close the cinder notch opening` the operator exhausts the pressure in the lower end of the cylinder and admits pressure to the upper end thereof, forcing thel cylinder down and raising the counterweight escaping 25- and forcing the stopper 15 into the opening in the monkey 14 very quickly, due to the short distance which the monkey is posi-` tioned away from the cinder notch opening and also to the curvature of the track 31 which allows the rear end of the dolly bar to drop very quickly, horizontal positionso that it readily enters the opening in the monkey 14 thus effectively and quickly closing the cinder notch opening- While I have described more or less pre.- cisely the details of construction, Ido not wish to be understood as limiting myself thereto, as I contemplate `changes in form and the proportion of parts and the substitution of equivalents as circumstances may suggest or render expedient without departing from the spirit or scope of my invention.

I claim:

1. A. cinder notch stopper comprising in combination, a dolly bar, a stopper mounted on one end thereof, an operating lever con.- nected to said dolly bar intermediate the ends thereof, power operatingmeans connected to said lever, a guide connected to the rear end ofsaid dolly bar, and a track placing the device in adapted to travel.

2. A cinder notch stopper comprising in combination, a dolly bar, a stopper mounted on one end thereof, an operating lever connected *to said dolly bar intermediate the ends thereof, power operating means con? nected to said lever, a guide lever connected to said dolly bar towards the rear end the-reof, a track upon which the upper end of the said guide is' adapted to'travel, andguiding means on the upper end of the said lever, the said track extending backward and upf ward for a part of its length and thence being curved upward. y

3. A cinder notch stopper comprisingl in combination, a dolly bar, a stopper mounted on one end thereof, 'an operating lever connected to said dolly bar intermediate the ends thereof, power operating means connected to said lever, a guide lever connected to said dolly bar towards the rear end thereof, a. track upon which the upper end or the said guide is adapted to travel, and guiding 'means on the upper end of the said lever, the

said track extending backward in a Subi stantial horizontal position for its length and thence being curved upward. Signed at Chicago, Illinois, this 15th day of February, 1927.

` JAM-ES DEWAR.-

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