US529306A

US529306A - Boiler

Info

Publication number: US529306A
Authority: US
Publication date: 1894-11-13
Anticipated expiration: 1911-11-13

Description

(No Model.) 4 sheets-sheet 2.

J. PIERPONT.

-BOILER. No. 529,306. Patented Nov. 13, 1894.

WITNESSES INVENTOR JW 9W( 4 Sheets-Sheet 3.

(No Model.)

J. PIERPOINT. BOILEB..

No. 529,806. Patented Nov. 13, 1894.

INVENTOR M AM/ ja, .u 0M. W l

? 7n/awww@ WITNESSES 4 Sheets-Sheet 4. J. PIERPOINT.

BOILBR. Y

Patented Nov. 13, 1894.

ENVEEZTOR (No Model.)

UNITED vSTATES PATENT OFFICE.

JAMES PIERPOINT, OF PITTSBURG, PENNSYLVANIA.

BOILER.

SPECIFICATION forming part of Letters Patent No. 529,306, dated November 13, 1894.

Application filed July 12,1894. Serial No. 517,342. (No model.)

T0 a/ZZ whom it may concern.-

Be it known that I, JAMES PIERPOINT, of Pittsburg, in the county of Allegheny and State of Pennsylvania, have invented a new and useful Improvement in Boilers, of which the following is a full, clear, and exact description, reference being had to the accompanying drawings, forming part of this specification, in which-- Figure l is a vertical sectional view of my improved boiler; and Figs. 2 to 6 inclusive are similar views of modified forms of the same.

My invention relates to the class of vertical water-tube boilers, and it consists broadly in a boiler having a front upper and lower drum connected by direct tubes and also by circulating tubes, and a series of drums within the setting through which the water passes successively or in serial order before reaching the front upper and lower drums.

It also consists in the construction and arrangement of parts as hereinafter more fully described and set forth in the claims.

In Fig. 1 of the drawings, 2, 3 and 4 represent elevated steam and water drums, and 5, 6, 7, are lower water drums designed for the collection of sediment precipitated from the water in the tubes of the boiler. Each of the upper drums has communication with a main steam delivery pipe 8, and each of the lower drums should be provided with a suitable valve-controlled blow-off pipe or cock. Therear drums 2 and 5 are connected by a bank of tubes 9, the middle drums 3 and 6 are connected by a bank of tubes 10, and the front drums 4 and 7 are connected by a bank of tubes 1l. The feed-water inlet pipe 12 enters the rear lower drum 5, and the upper drums 2 and 3 are connected by an overflow water pipe 13 which permits the water to flow from drum 5 through the tubes 9 and drum 2 into the drum 3. The lower drum 6 is connected with the upper drum 4 by a diagonal feed pipe or pipes 14, and the front drums 4, 7, are connected by a bank of circulating tubes 15.

16 is a lire-brick partition interposed between the banks of tubes l1 and 15; and 17 is a partition interposed between the banks 9 and 10.

18 is the combustion-chamber of the furnace, and 19 is the stack-flue.

The hot gases and products of combustion from the combustion-chamber ascend first along the tubes 11, then descend along the

tubes

10 and 15, and nally ascend along the bank of tubes 9. The tubes 11 therefore are exposed to the greatest heat, the tubes lO and 15 to less heat, and the tubes 9 to still less than the tubes 10, which in turn are subjected to greater heat than the tubes 15.

The operation is as followsz-The boiler having been filled up to the Water level of the upper drums by water admitted through the feed-pipe l2, and the fire having been started in the combustion-chamber so as to raise the temperature of the water to the boiling point, the difference in temperature to which the banks of tubes ll and l5 are subjected causes a continuous circulation between the drums 4 and 7 up the tubes 1l and down the tubes 15. As the water in the boiler is evaporated, the feed water, entering the drum 5, ascends to the drum 2 through the tubes 9, passes into the drum 3 through the tubes 13, thence descends through the tubes 10 to the drum 6, and thence rises through the pipe or pipes 14 to the drum 4, whence it passes in circuit back and forth between the drums 4 and 7 as above explained. The pipe (or pipes) 14 is preferably of such small area relatively to the conjoined area of the tubes of any of the banks, that it shall be sufficient only to conduct the feed-water to the drum 4, but not sufficient to permit local circulation of water between the

drums

4 and 6. As the drums 5, 6,7, are not connected by nipples, the water passes in continuous serial course from the rear feed drum of the boiler until it reaches the part of the boiler comprising the two front drums and their double connecting banks of tubes, and when it reaches this front part of the boiler it Vtravels in circuit from one drum to the other.

The construction is very favorable to the precipitation of sediment before the water reaches the hottest tubes, and is well adapted to produce dry steam and to maintain a constantly uniform water level for the water of the upper drums.

Variations in the construction of the boiler, embodying the principles above stated, may be made by the skilled mechanic. Thus in Fig. 2 I show a modification, in which the parts corresponding tothe parts of Fig. 1

IOU

are designated by the same numerals distinguished therefrom by the prime mark. Here the feed-water pipe 12 is connected with the upper drum 2', the drums 5' and 3 are connected by a diagonal bank of tubes 13', and the remainder of the boiler is the same in construction as in Fig. l. In this case, the direct course of the feed-water is in succession through the drum 2', tubes 9', drum 5', tubes 13', drum 3', tubes 10', drum 6', tubes 14', to the drum 4', whence it travels in circuit through the tubes l1 and 15.

In Fig. 3, in which the parts are designated by the reference figures of Fig. 1, distinguished by the exponent letter ct, the feedwater pipe 12a enters the upper drum A2a, the lower drums 5a and 6a are connected by pipes or nipples 13', and the middle upper drum 3a is connected with the lower front drum 7a by a diagonal feed-pipe or pipes 14a. Here the course of the feed-water is from the drum 2' through tubes 9a, drum 5a, pipes 13, drum 6, tubes 10', drum 3', pipe or pipes 14 to the drum 7, whence it travels in circuit through the tubes 11a and 15a.

In Fig. 4, in which the parts are distinguished by the exponent letter b, the feedwater enters the drum 2b, the drums 5b and 6b are connected by pipes or nipples 13b, and the drums 3b and 4b are connected by pipes or nipples 14. The course of the feed-water is from the drum 2b through the tubes 9b, drum 5b, pipes 13b, drum 6b,tubes 10b, drum 3b, pipes 14", to drum 4b, whence it passes in circuit through the tubes 11b and 15".

In Fig. 5, in which the parts are distinguished by the exponent letter o, there are but two lower drums 5C and 7C. The feedwater inlet 12c enters the rear upper drum 2C, the drum 5 is connected with the drums 2 and 3c by tubes 9, 10c, and the drum 3c is connected with the drum 7'c by a feedpipe or pipes 14. The course of the feedwater to the drum 7 is from the drum 2c through the tubes 9c, drum 5, tubes 10C, drum 3c, and pipe 14C, whence it travels in circuit through the tubes 11c and 15C.

In Fig. 6, in which the parts are distinguished by the exponent letter d, the feedwater pipe 12l enters the rear lower drum 5d, the drums 2d and 3d are connected by pipes or nipples 13d, and the drums 3d and 4d are connected by pipes or nipples 14d. Here the feed-water passes from the drum 5d through the tubes 9d, drum 2d, pipes 13d, drum 3d, pipes 14d,to thedrum4d,whence it circulates through the pipes 11d and 15d.

Other modifications of my invention embodying the same principle will suggest themselves to those skilled in the art.

With a view of claiming broadly the principle of construction above described, and also of claiming the diagonal feed tube and final circulating pipes shown in Figs. 1, 2, 3, 4, and 5, I claim as my invention-- 1. A steam boiler having upper steam and water drums and lower water drums, direct tubes connecting the front upper and lower drums, circulating tubes arranged in a cooler part of the furnace, also connecting said front upper and lower drums, a feed water inlet entering one of the rear drums, and tubes or pipes connecting serially the feed water inlet and intermediate drums, with the circuit constituted by the frontdrurns and their tubes; substantially as described.

2. A steam boiler comprising lower water drums, and three upper steam and Water drums, direct tubes connecting the front upper and lower drums, circulating tubes also connecting said front upper and lower drums, said circulating tubes being arranged in a cooler part of the furnace, and tubes or pipes connecting serially the other drums with each other and with the circuit constituted by said front drums and their tubes; substantially as described.

3. A steam boiler comprising lower water drums, and upper steam and water drums, direct tubes connecting the front upper and lower drums, circulating tubes also connecting said front upper and lower drums, and set in a cooler part of the furnace, tubes or pipes serially connecting the remaining drums with each other, and a pipe or pipes extending from one of the front drums to one of the hinder drums, whereby is formed a connection between the circuit constituted by the front drums and their tubes, and the remaining drums; substantially as described.

4. A steam boiler comprising water drums, and upper steam and water drums, direct tubes connecting the front upper and lower drums, circulating tubes also connecting said front upper and lower drums, and set in a cooler part of the furnace, tubes or pipes serially connecting the remaining drums with each other; and a pipe or pipes extending diagonally from one of the front drums to one of the hinder drums, whereby is formed a connection between the circuit constituted by the front drums and their tubes, and the remaining drums; substantially as described.

5. A steam boiler comprising water drums, and upper steam andv water drums, direct tubes connecting the front upper and lower drums, circulating tubes also connecting said front upper and lower drums, and set in a cooler part of the furnace, tubes or pipes serially connecting the remaining drums with each other, and a pipe or pipes extending diagonally from one of the front drums to one of the hinder drums, whereby is formed a connection between the circuit constituted by the front drums and their tubes, and the remaining drums, said diagonal pipe or pipes being of small area relative to Ithe conjoined area of the tubes of any of the banks; substantially as described.

6. A boiler comprising upper steam and water drums, 2, 3, 4, lower water drums, 5, 6, 7, tubes 9 connecting the drums 2, 5, pipes 13 connecting the drums 2, 3, tubes lO connecting the drums 3, 6, tubes 11 connecting` the IOS lIO

IIS

drums 4, 7, circulating tubes 15 also connecting the drums 4, 7, and a feed-pipe or pipes 14 connecting the

drums

6 and 4; substantially as described.

7. In a steam boiler andin combination with the upper and lower drums, a bank of direct tubes connecting the front upper and lower drums, a tire wall or partition as 16, and a bank of circulating tubes arranged in rear of 1o said partition, but connecting the front upper and lower drums, with means for connecting the remaining drums with each other, and withthecircuit constituted by the front drums and their tubes; substantially as described.

In testimony whereof I have hereunto set 15 my hand.

JAMES PIERPOINT. Witnesses:

THOMAS W. BAKEWELL, F. E. GAITHER.