US1297659A - Steam-trap. - Google Patents

Description

T. A. CHALMERS.

STEAM TRAP.

APPLICATION FILED IuLY I8. Isla.

- Patented Mar. 18, 1919.

l l I l l l l l THOMAS A. cHALMERs, oF CAMDEN, NEW JERSEY.

STEAM-TRAP.

T0 all whom t may concern:

Beit known that I, THOMAS A. CHALMERS, a citizen of the United States, and a resident of Camden, county of Camden, State of'New Jersey,.have invented certain Improvements in Steam-Traps, of which the following is a specification.

My invention relates to certain improvements in steam traps particularly adapted for removing the water of condensation from the drying V4cylinders of drying machines, but it will be understood that the invention can be used in connection with othei machines where a large quantity of water `accumulates and whichl must be removed in order yto produce the best results.

f The object 'of'my invention is'to improve the construction of lsuch Ia trap, and to provide a reservoir fromwhich the floatvb-ox can be quickly filled and also to provide a trap whichcan be readily operated so as to relieve the cylinder of the'water'of condensa- 2 tion.

In the accompanying drawings Figure 1, is a vertical sectional view illustrating my improved trap, the-valve beingin the closed position; y

Fig. 2, is a plan view; and

Fig. 3, is a detached sectional view, showing the main valve in the open position.

1 is a casing inclosing a chamber 1Q in which the mechanism is mounted. 2 1s a cover for the casing, secured thereto in any suitable manner. 3 is the 'inlet pipe leading from the cylinders to a drying machine, or other apparatus in which the water or condensation accumulates. Locatedin the cover, in the present instance,.is apassage 5, which communicates with the pipe 3 and with .the interior of the main valve casing 6. Mounted on the cover 2 is a reservoir 7 connected by a neck 8 with the chamber 10. A pipe 9 also forms communication between the bottom of the reservoir 7 and the chamber and has a check valve 11 closing l gainst pressure from the interior of the casing.

12 is a pipe leading from the upper end of the chamber 10 to :the upper portion of the reservoir 7 and has a check valve 13 therein, closing against pressure from the chamber. In the chamber 10 is a oiat box 14 which is hollow and is open at the top. At thecenter of the box is a tube 15 forming an opening for the passageof the stem 16 of the valve 17. In the present instance, this valve stem has a pin 18 which extends into a slot 19 1n the VSpecification of Lettersratent.

,Patente d' Mar. 12s, .19.19.

Application filed July 18, 1918. Serial No. 245,549.

tube {15.50 .astof allow. theiioat box to. have a certain )amount of vertical movement without operaitimgggI the .stem of the valve. The valve 17 is Ia balanced val-vefhav-ing two beveledl disks205 adapted to f seats v21 v inthe casing 6.

The stemlextends from the screw cap 22 in the lofWer portion ofthe valve casing 6 and also extends through a projection 23 formingpart of the casing. In the casing is a passage 24 rforming communication with thespace below the lower disk and'thisfpassage is opento the interior of the-chamber 10, aslwell as the passa-ge' 25, which is above the valve, so that thelm'omemt the vlalve is open the wlater of condensation in thevalve casing 6, in the passage-5, and the pipe 3 will flowfth'roughfthe valve casing and int-o the chamber 10.

26is Aa pipe screwed intothe bottom of the neck l'S-olthe reservoir 7, and extends into the oat box, terminating at a -point'nearthe bottom, as shown in Fig. l. A.pi:pe 27 forms a continwation ofthe'pipe 26 and extends to apointabove thebottom of the outletpipe 28 -frointhe reservoir which'leads to waste.

When the ipantsare in the position illustrated in Fig. 1, the vlalve -17 is closed against yits seat andthe water of condensa# tion iaccinnulatesin the casing 6, connection 5 and pipe 3. Thereis water inthe reservoir, as indicated inthe drawings, the surplus wiater having escaped through the outlet pipe 28. The waterin the reservoir 7 flows through the pipev9jp1as't the check valve 11 and into the ioatbox 14,.a.nd as the water accumulates in the float box'iti tends to settle the floatb'ox inthewater'inthe chamber 10 until the boxsinks by itsfown weight.l The rstmovement of the box will not affect Jche stem 16, :owing to the lost motion between the pin 18 and the ends of the slot 19 in the tube 15 of the box, but as soon as this lost motion is taken up the box will move the valve 17 off its seat in the casing 6 and the main b'ody of water of condensation will iow Jfrom the passage 5 into and through the casing 6, past the valve 17, through passages 24 and 25 and into the chamber 10. The water lowing into the chamber 10 and float box 14 will be forced, by the steam back of the water, through the .pipes 26 and 27 and into the reservoir 7, and as the water accumulates in this reservoir it will flow out through the pipe 28 to waste. As soon as a certain amount of water is discharged, the float box will rise, owing to its buoyancy, and will close the valve, 17 against its seat. When the valve 17 is opened, the first inrush of water causes air to be forced out of the chamber l0, through the pipe l2 and past the check valve 13, as the pressure is not sufficient to close rthe valve, and a certain amount of water is carried with this air and is discharged into Jche reservoir 7 It will be seen from the above construction, that I amv enabled to have a continu- 'ously acting steam trap which will work automatically to draw off the water of condensation from machines where a considerable amount of steam is condensed, such as the cylinders of a drying machine, and the water in the reservoir will How down into the ioat box and will cause the float box to be dropped so as to open the main valve, and the inrush of water, caused by the pressure'of steam back of it, will flow into the chamber l0 and will pass up into the reservoir and will flow to waste. As soo-n as the pressure is relieved the main valve will again close and the water in ,the reservoir, which has accumulated below the waste pipe, will flow through the pipe 10 again into the float box and the operation will be repeated so that therewill be a constant movement of the lbox to relieve the cylinders of the water of condensation.

I claim l. The combination in a steam trap, of a casing inclosing a chamber; a float box mounted inthe chamber; a supply pipe for the water of condensation; a main valve closing the ysupply pipe, said main valve being opened when suiiicient water accumulates in the floatbox; a reservoir; a passage leading from the reservoir to the chamber; and a pipe extending from a point near the bottom of the float box to the reservoir, so that when water is forced into the chamber by the pressure of the steam when the main valve is opened, it will be fo-rced into the reservoir from the float box and the float box will rise, closing the main valve.

pipe communicating with the reservoirandy having a check valve; and a waste pipe leading from the upper portion of the reservoir.

Y 3. The combination in a trap for water of condensation, of a casing having a chamber; A

a passage communicating with lthe chamber and terminating in a valve casing; a balanced valve in said casing; a float box mounted in the chamber, said valve having a stem arranged to be engaged by the ioat box to open the valve when the box sinks by the accumulation of water in the box; and a discharge pipe extending into the float box. Y

4. The combination o-f a casing, a float box therein; a valved inlet for water of condensation and arranged to discharge into the float box; a reservoir above the casing; a pipe forming a communication between the oat box and the reservoir; and a pipeV leading from the reservoir and arranged to discharge waiter from the reservoir into the float box to open the valve.

5. The combination of a casing; a float box therein; a valved inlet forV water of condensation; a reservoir; an outlet for the reservoir some distance above its bottom; a pipe leading from a point near the bottom of the float box to a point aboverthe botso f tom of the outlet pipe from the reservoir;

and means for supplying the float box with water from the reservoir.

In witness whereof I afix my signature.

T HoMAs A. oHALMERs.

Copies of this patent may be obtainedior ve cents each, by addressing the Commissioner of Patents,

Washington,V D. C.

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