US838657A - Steam-trap. - Google Patents

Description

No. 838,657. PATENTED DEC. 18, 1906.

E.'A. SIKES. STEAM TRAP.

APPLICATION FILED JAN, 2, 1906.

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STEAM-TRAP.

Specification of Letters Patent.

Patented Dec. 18, 1906.

Application filed January 2. 1906. Serial No. 294,056.

To all whont it may concern:

7 Beit known that I, EUGENE A. SIKEs, a citizen of the United States, residing at l/Vorcester, in the county of l/Vorcester and State of Massachusetts, have invented anew and useful Steam-Trap, of which the following is a specification.

The object of this invention is to provide a new and improved trap for draining water from steam systems or for similar purposes.

To this end the invention consists of the device described and claimed in this specification and illustrated in the accompanying drawings, in which Figure 1 is an elevation, partly in section, of the device. Fig. 2 is a detail of a modified double valve hereinafter referred to, and Fig. 3 is a view of a modified connection.

Referring to the drawings and in detail, S designates the steam pipe or system from which it is desired to drain the water.

H designates a receiver or pot usually made out of a cast-iron cylinder and which may have suitable supporting legs. This receiver is connected by a pipe 10 to the pipe S, so as to stand below the same. A pipe 11 is connected to the lower part of the receiver. A vertical trap T, which is formed out of pieces of pipes and by suitable unions, is connected to the pipe 11. The end of the vertical trap connects with the top of a valve-cas ing 12. The valve-casing is provided with two valve-seats 13 and 14, the seat 13 being larger than the seat 14. A double valve is arranged in the casing. This double valve consists of a valve 15, engaging the valveseat 13, and a valve 16, engaging the valveseat 14. The valves 15 and 16 are mounted on a common stem 17. The valve 15 is somewhat larger than the valve 16. A pipe or connection 18 is connected to the bottom of the receiver R below pipe 11. An escape or exhaust pipe 19 for the water is connected to the valve-casing, as shown, so as to communicate with the space between the two valve-seats. This pipe thus drains any flow that comes through the valve-seats. A by pass 20 is arranged in the valve casing around the valve-seat 13, and this by-pass is controlled by a small turning-plug 21.

lVhen there is simply steam-pressure in the receiver R, the steam-pressure will act on the top of the larger valve 15 and on the bottom of the smaller valve 16 and owing to Y the difference in exposed area of the valves the valves will be kept to their seats. As water, such as the water of condensation, drops down into the receiver the level ofthe water will rise in the receiver, and when it reaches a level above the connection to the trap T the steam in the trap T will be trapped or cut off by the water in the receiver, thus keeping the steam-pressure on top of the larger valve 15. As the level of the water rises in the receiver R the hydrostatic head or pressure thereof will be added to the pressure on the under side of the smaller valve 16, or, in other words, the under side of this valve will now be exposed to the pressure from the steam in the receiver R and also to the additional pressure of the water column in the receiver. As the water-level rises a point will be reached where the pressure on the under side of the smaller valve 16 will overbalance the steam-pressure on top of the larger valve 15. When this takes place, the valves will lift from their seats and will allow the water to run out from the receiver into the escape-pipe 19. This flow will continue until the conditions are such that the valves will return to their seats. If thevertical trap should get bound, the same can be released by opening the valve 21 and allowing a flow through the by-pass 19. The condensation of the steam in the vertical trap after the same has been trapped therein will also help to lift the valves from their seats to allow the draining of the receiver. The bottom of the receiver is made pan or dish shaped, and a pipe 22 is connected to the bottom of the receiver and is provided with a valve 23, so that dirt or sediment can be blown off without passing through the double valve.

The device is extremely advantageous in operation. It can be constructed so as to have entire freedom from packings. It is extremely simple, as no floats, springs, or levers are necessary. It is positive in action and not liable to get out of order. It is extremely accessible for examination or for regrinding of the valves, and when worn out a new valve can be readily and quickly adjusted. By properly designing the valves the device can be used on high or low pressure steam systems. The upper valve in some instances may be made in the form of a piston fitting in the valve-casing, as illustrated in Fig. 2, the term double valve, as I use the same in the claims, being intended to cover both such structures. In some instances the trap T may be connected. directly to pipe 18 and pipe 11 omitted, as shown in Fig. 3.

The details and arrangements herein'shown and described may be greatly and otherwise varied by a skilled mechanic without departing from the scope of my invention as expressed in the claims.

Having thus fully described my invention, What I claim, and desire to secure by Letters Patent, is-

1. A device for the purpose stated, comprising a trap, a valve having differential exposed areas, the interior or steam chamber of the trap being in constant communication with, and the pressure acting on, the larger area, and means for allowing the water in the trap to act on the smaller area in opposition to the steam-pressure on the larger.

2. A device for the purpose stated, comprising a receiver, trap connected therewith, a valve having di'lt'erential areas, pressure in the trap constantly acting on 1. larger area, and means for allowing the water in the trap to communicate with, and act on, the smaller valve in opposition to the pressure on the larger valve.

A device for the purpose stated, com prising a receiver, a vertical trap connected thereto, a valve casing having a double valve-seat therein, the end of the trap connecting to the top of the valve-casing, a double valve arranged in the casing, the upper valve being larger than lower valve, T'llG pressure from tl': e trap being in constant communication with the top of the upper valve, and a connection allowing the water to act on the under side of the smaller valve.

4. A device for the purpose stated, comprising a receiver, a vertical trap having a tree unobstructed passage connected thereto, a valve-casing to the upper side of which said trap is connected said valve-casing having two seats, two valves arranged on. a common stem and fitting said seats, the upper valve being the larger of the two, and a connection to the receiver allowing the water to act on the bottom side ot the lower valve, and an i exhaust connected to the space between the two valve-seats.

5. A device for the purpose stated, comprising a vertical trap, a double valve having differential areas, the pressure in the trap acting on the larger valve, a connection allowing the water to act on the smaller valve in opposition to the pressure on the larger valve, a by-pass around the larger valve, and a valve controlling the by-pass.

6. A device for the purpose stated, comprising a receiver, a vertical trap connected thereto, a double valve having differential areas, the pressure in the trap acting on the larger area, a connection to the receiver allowing the water to act on the smaller area in opposition. to the pressure on the larger area, and a blow-oft pipe connected to the bottom of the receiver.

7. The combination of a receiver for connection with a steam system, a pipe extending upwardly from the receiver, a second pipe extending from the receiver, a valve-casing communicating with both of said pipes, a valve-stem, and two valves fixed to said stem, one having a larger area than the other, the larger valve being in communication with the pressure in the first pipe and the smaller valve with the pressure in the-second pipe.

8. Tire con'rbination of a receiver for connection with a steam system, a pipe extending upwardly eretrom, a second pipe extending from ti. receiver at a point below that at which the first pipe leaves it, a valvecasing communicating with both of said. pipes at opposite ends, a valvewtem, and. two valves fixed to said stem in the casing, one valve having a larger than the other, the larger valve bein urged to its seat by the pressure in the first pipe and the smaller valve being ur ed from its seat by the pressure in. the second pipe.

In testimony whereof I have hereunto set my hand in tre presence of two subscribing witnesses.

EUGENE A. SIKES.

Witnesses L0U1s W. SOUTHGATE, irlARY E. REGAN.

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