US1154026A - Exhaust-nozzle. - Google Patents

Description

C. B. KING & C. B. WESTON.

EXHAUST NOZZLE.

APPLICATION FILED ocr. 25. 1913.

1 ,1 5%.,O26, Patented Sept. 21, 1915.

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EXHAUST-NOZZLE.

L saoee.

Specification of Letters Patent.

Patented Sept. 21, 1915.

Application filed October 25, 1913. Serial No. 797,239.

portable engines which necessarily employ a short stack.

- It has. been customary heretofore to discharge exhaust steam from the engine into the stack at the base. thereof for the purpose of creating a forced; draft through the stack in a well'known manner. The stack of the ordinary portable boiler is so. short,

however, that the steam would pass from the. discharge end of the exhaust pipe through the center of-the stack and escape. from the top. thereof before it had spread out sufficiently to completely fill the stack As a result the. suction created thereby is very materially reduced Further, it has been found that in boilers of the type under discussion there is a strong tendency for the draft to pass-upward through the central fines of the boiler to. the exclusion of the outer flues. thus tending to overheat the central lines while the outer flues remain cool.

The object of the present invention is, first, to provide means whereby the exh st may be. discharged into the short stack of a portable engineor the like in a manner to create a maximum of suction in the stack and through the flues of the boiler; second, to provide means for causing a substantially equal distribution of the draft among the several flues; and third, to provide means wherebyv the exhaust steam may be utilized to prevent the distributing device, from being overheated and distorted by the heat within the. boiler. I

In the accompanying drawings, Figure 1 is a vertical, sectional view taken centrally through a vertical boiler of the submerged flue type showing the exhaust nozzle and deflector; and Fig. 2 is a detail view of the combined exhaust nozzle and deflector.

In. these drawings we have illustrated the invention as applied to a boiler of the submerged flue type in which the upper ends of the fines are. below the water level and are connected with the stack by means of a conical housing or uptake but it is not to be uiderstood that the invention is necessarily limited to this type of engine.

in carrying out the invention we place the exhaust nozzle within the boiler at a point remote, from the lower end of the stack. Consequently, the. steam discharged from the nozzle, will have an opportunity to spread before it reaches the stack and when it does reach the. stack will completely fill the same so that the upward movement of the steam will create a strong suction within the flues in the boiler. 'We have further provided a distributor or deflector which is arranged above the centralfiues. 0f the boiler and so mounted with relation to the stack that the suction will act with substantially equal force on all the fines, and further we have, combined the deflector with the, exhaust nozzle in such a manner that the exhaust steam will act constantly upon the deflector and prevent the same from being overheated. As a result of this organization we. secure, a maximum of draft and distribute this draft substantially equally among the several fiues of the boiler.

As illustrated in the drawings the boiler is indicated at 1 having a fire box in the lower portion thereof and vertical fiues 3. immediately above they fire box. These fiues terminate below the normal water line of the boiler and extending upwardly from the upper ends of the fiues is a conical housing 4, sometimes known as an uptake, which terminates at the base of and communicates with the smoke stack 5. Extending into the upper end of the casing 4 is an exhaust pipe 6 of the engine, which is not here shown and this pipe extends downward to a point remote from the lower end of the stack and in the present instance more than half the distance between the base of the stack and the tops of the fines. Secured to the lower end of the exhaust pipe 6 is a discharge nozzle 7 which constitutes the discharge end of the pipe and is in the form of a casing closed at its bottom andside walls'and having two openings in its top wall, one to receive. the exhaust pipe and the other to constitute the discharge opening of the nozzle, as indicated at 8. The exhaust steam entering the closed casingof the nozzle is deflected upward and discharged from the opening 8 at a point con siderably below the base of the stack. As a result the steam will spread as it passes upward and by the time it has reached the base of the stack will have spread out to such an extent that it will completely fill the stack,

thus creating a powerful suction as it sweeps upward through the stack. This suction in the form of an inverted cone, as shown at 10, and the apex of this cone is arranged substantially centrally of the group of flues 4. This'deflectoris interposed directly between the stack and. the flues and preventsthe suction through the stack from acting directly on the central flues. The suction created by i .the passage'of the exhaust through the stack acts upon the annular space between the combined nozzle and deflector and the wall of the casing or uptake 4 and, consequently, the outer flues are affected thereby to an ex- 1 tent substantially equal with the inner flues.

By combining the deflector or distributer 10 with .the nozzle 7 the steam passing through the nozzle actson the deflector and prevents the same from being overheated, to the point of destruction, by the intense heat from the flues.

The operation of the device will be readily ranged the discharge nozzle for the exhaust steam that the discharge of the steam into the stack will produce a maximum suction throughthe flues; further, that we have dis tributed this suction so that it will act on all the flues with substantially equal force and no one flue orgroup of flues will be overheated while others are underheated; and further, that wehave so constructed and arranged the distributing device or' deflector that it will not be destroyed by the heat in the flues.

While we have shown and described one embodiment of our invention it will be understood that this has been chosen for the purposes of illustration only and that we do Having thus fully described our invention, what we claim as new and desire to secure by Letters Patent, is i l. The combinatiomwith a boilerhaving vertical flues, a stack arranged above said flues and spaced away therefrom, and an uptake arranged within said boiler andconnecting said flues with said stack, of'an' exhaustpipe leading into said uptake and discharging into said stack, the discharge end of said pipe being arranged betweenthe base of the stack and the flues at a point remote from the base of the stack and substantially centrally of the flues, and a deflector arranged in alinement with the discharge end of said exhaust pipe between the same and said flues to deflect the products of combustion toward the'walls of said uptake on all sides of said deflector and equalize the draft through the several flues. v

2. The combination, with a boiler having vertical flues, a stack supported by said boiler above said flues and in substantial alinement therewith, "and a housing within said boiler connecting said flues with said stack, of a deflector arranged within' said housing near said flues and in alinement with the base of said stack to direct" the products of combustion toward the wall of said housing on all sides of. said deflector and cause the draft through said stack to be, distributed substantially equally to theseveral flues. i v r v p 3. The combination, with a boiler having flues, astack supported above said flues, and a housing connectlng said flues with said stack, of a combined nozzle and deflector supported within said housing below said stack and directed toward the stack, and an exhaust pipe communicating with said nozzle. 7

4:. The combination, with a boiler having flues, a stack supported above said flues, and a housing connecting said flues with said stack, of an exhaust pipe extending into said boiler at the upper end thereof and having a portion extending downward into said housing, a nozzle carried by said downwardly extending portion of said exhaust pipe and having its discharge opening directed toward said stack.

5. The combinatiomwith a boilerhaving vertical flues, and a stack supported by said boilerabove said flues, of a hollow deflector interposed between said stack and saidflues, and'means for causing steam to circulate in said deflector.

6. The combination, with a boilerhaving' vertical flues, a stack supported by said boiler above said flues, and a housing within said boiler connecting said flues with said stack. of a hollow deflector arranged within said housing and interposed between said stack and said flues. and means'for-introducing steam into said deflector.

7. The combination, with a boiler having vertical fines, a stack supported by said boiler above said fines, and a housing within said boiler connecting said fines with said stack, of a discharge nozzle supported within said housing between the base of said stack and said fines, directed toward said stack and having a lower portion shaped to form a deflector, and an exhaust pipe connected with said nozzle.

8. The combination, with a boiler having fines, and a stack spaced away from said lines, of a discharge nozzle interposed between said stack and said fines and having a portion forming a deflector, and an exhaust pipe connected with said nozzle.

9. The combination, with a boiler having fines, and a stack spaced away from said fines, of a discharge nozzle interposed between said stack and sald flnes and having a portion in the form of an inverted cone arranged in alinement with said fines and having its apex arranged centrally of said fines, and a steam pipe connected with said nozzle.

10. The combination, with a boiler having fines, and a stack supported above said fines, of a combined nozzle and deflector supported between said stack and said fines in substantial alinement with said fines and having its discharge opening directed toward said stack, and an exhaust pipe communicating with said nozzle.

In testimony whereof, we our signatures in presence of two Witnesses.

Witnesses:

BENJ. JAcoBY, CHESTER H. GIBBoNs.

Copies of this patent may be obtained for five cents each, by addressing the Commissioner of Patents. Washington, D. C.

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