US1529218A - Hydraulic valve and operating means therefor - Google Patents

Description

March 10, 1925- 1,529,218

- P. SANDWELL HYDRAULIC VALVE AND OPERATING MEANS THEREFOR Filed March 13, 1924 2 Sheets-Sheet 1 INVENTOR E FERcY SANDWELL ATTORNEYS March 10. 1925- 1,529,218

P. SANDWELL HYDRAULIC VALVE AND OPERATING MEANS THEREFOR Filed March 13, 1924 2 Sheets-Sheet 2 5o 64 49 65 I I 60 ZI.Z.

E INVENTOR PERCY SAND'WELL BYfilum l g TOR NE YS Patented Mar. 10, 1925.

UNITED STATES PATENT OFFICE.

PERCY SANDWELL, OF POWELL RIVER, BRITISH COLUMBIA, CANADA, ASSIGNOR OF ONE-SIXTH TO WILLIAM BRUCE ZUMWALT, AND ONE-SIXTH TO HENRY ANDREW MOILLWAINE, BOTH OF POWELL RIVER. BRITISH COLUMBIA, CANADA.

HYDRAULIC VALVE AND OPERATING MEANS THEREFOR.

Application filed March 13, 1924. Serial a... 699,181.

To all whom it may concern:

Be it known that I, PERCY SANDWELL, a subject of the King of Great Britain. and a resident of Powell River, in the Province of British Columbia, Canada, have invented certain new and useful Improvements in Hydraulic Valves and Operating Means Therefor, of which the following is a specification.

My invent on relates to improvements in hydraulic valves and operating means therefor, and the object of the invention is to provide means whereby the admission of liquid to a stock tank or the like beneath the liquid level may be automatically controlled to maintain a constant level therein. A further object is to provide manually actuated means at the supply valve and at a point remote therefrom whereby the supply valve may be opened or closed. The invention consists essentially of a main supply valve normally opened and closed by fluid pressure supplied thereto from a suitable source, a float operated piston valve which is adapted to convey the pressure as required to open or close the main valve and a remote control valve between the float valve and the main valve whereby the latter may be independently actuated, as will ,be more fully shown in the following specification, in which Fig. 1 is a general view of my invention.

Fig. 2 is a sectional view of the remote control valve taken on the line 22 of Fig. 3.

Fig. 3 is a sectional view taken on the line 3-3 of Fig. 2.

Fig. 4 is a sectional view of the main supply valve.

Fig. 5 is a view showing the manner in which the float cord is secured to the sheave of the float operated piston valve.

In the drawings like characters of reference indicate corresponding parts in each figure.

My invention is particularly adaptable for use in connection with a stock tank such as is usedin paper mills where the liquid is supplied into the tank beneath the liquid level, and the discharge takes place over an end gate.

The numeral 1, see Figs. 1 and 4, indicates generally the supply valve which has a cylindrical-body 2 terminating at its outlet end with a. flange 3 and at the opposite end with a flange 4. Intermediately of the length of the body 2 is an internal annular flange 5 which forms a cylinder head for the annular cylinder portion indicated by the numeral 6. Secured to the flange 4 is an annular flange 7 which forms an opposmg cylinder head to the internal flange 5 and which carries an inwardly projecting sleeve 8 the outer end of the sleeve being provlded with a flange 9 for connection-to the feed pipe 10, the inner end of the sleeve 8 forms an inner wall to the annular cylinder 6.

The numeral 11 is a flanged connection to the tank 12 which is connected through to the flange 3 of the valve body 2. 13 is a cone shaped end closure supported concentrically within the valve body, and spaced from the side walls are a plurality of radially disposed webs 1 1 which are carried.

at their outer extremities by a flange 15, the flange being held in position between the flanges 3 and 11. 16 is a circular recess in the end closure 13 extending from the apex in the direction of flow. 17 is a valve seat formed upon the periphery of the end closure 13.

The numeral 18 indicates a valve sleeve which is adapted for endwise movement within the valve body 2 and efl'ects a closure between the inwardly projecting sleeve 8 and the end closure valve seat 17, at the inlet end of the sleeve 18 is an annular piston 19 which is in contact with the sleeve 8 and the valve body 2 and is movable endwise between the flanges 5 and 7 20 indicates a plurality of radially disposed spokes connected at their outer ends to the inner periphery of the valve sleeve 18 and at their inner ends to a tubular guide 21 which is longitudinally movable within the recess 16 of the end closure. 22 is a fork mounted upon the guide 21. The numeral 23 indicates a transverse shaft suitably journalled in opposite side walls of the sleeve 8 which is provided outside the valve body with an operating lever 24 (see Fig. 1) and inside the sleeve 8 with a crank 25, 26 is a crank pin.. 27 is a link connected at one end to the crank pin 26 and at the opposite end to the fork 22 by a pin 28, by which an operating connection is established between the lever 24 and the valve sleeve 18.

The numeral 29 indicates a pair of pet cocks connected to opposite ends of the annular cylinder 6 and preferably dis osed on the underside of the valve, by whic the water pressure on either side of the annular piston 19 may be relieved when it is desired to operate the valve 1 by means of the hand lever 24. The numeral 30 indicates a pair of ports leading from the pressure suppl pipes31 and 3-2 to the cylinder 6 by whic fluid pressure is admitted to and relieved from opposite sides of the annular piston 19, whereby the valve sleeve 18 is moved towards or from the valve seat 17.

The numeral 33 (see Fig. 1) indicates a float operated pilot valve of any desired piston type to which is connected a fluid pressure supply pipe 34, a discharge pipe 35 and alternate lead pipes 36 and 37, the numeral 38 indicates a rope quadrant which is suitably journalled above the valve 33 and is coupled to the piston 39 thereof. The quadrant 38 (see Fig. 5) is provided with a rim 40 having side flanges 41 and a tread formed with a plurality of segments 42 which are spaced an appreciable distance apart and between the ends of which are provided substantially half round bars 43 connected at opposite ends to the side flanges 41 to define pairs of spaces 44 through any of which a bight of the rope 45 may be taken for the purpose of providing a frictional grip thereto.

The numeral 46 (see Fig. 1) indicates a counterweight from one end of the rope 45, and 47 is a float upon the oppositeend thereof which rises and falls with the liquid in the tank 12 thereby actuating the piston 39 of the valve 33 to admit fluid pressure through either the pipes 36 and 31 to close the main valve 1, or the pipes 37 and 32 to open it. 4

Interconnected between the pipes 36 and 37 and the pipes 31 and 32 is a remote control valve generally indicated by the numeral-48, (see Figs. 2 and 3) of which 49 is the body having a central recess 50 and a plurality of ports which communicate between the various pipes and the recess 50, the ports are indicated b the numerals 51, 52, 53, 54, and 56, within the recess 50 is a rotatable valve plug 57 having a stem 58 and an operating handle 59, 60 and 61' indicate passages through the plug which normally, or when the system is controlled by the float valve 33, register respectively with the body ports 51 and 52 and with 53 and 54. The numeral 62 indicates a poripheral passage registering normally with the port 55 only. 63 indicates a pair of passages formed in the periphery of the plug and extending from above its longitudinal centre to the base thereof and are at all tiines 2 in register with the base of the recess 50,

the outlet dischar 0 port 56 and the discharge pipe 64. he numeral 65 indicates a fluid pressure supply pipe connecting with the port 55 by which the valve 1 is controlled by the medium of the remote contro valve 33. The float on rising to a predetermincd level causes water to flow from the pressure supply pipe 34-: through the valve 33, the pipe 36, through the ports 51 and 52 and the passage 60 of the valve 48 through the pipe 31 into the cylinder 6 where its pressure is exerted upon the piston 19 closing the valve, the water on the opposite side of the piston being free to escape upwards through the pipe 32, the ports 54 and 53 and the passage 61 of the valve 48, thence through the pipe 37 through the pilot valve 33 and the discharge pipe 35 thereof into the tank 12. The falling of the float below a predetermined level causes the water from pipe 34 to pass through the valve 33 into the pipe 37 and thence in an entirely opposite direction throughout the system opening the valve 1, the discharge from the cylinder passing from pipe 36 through the pilot valve 33 and the discharge 35 as in the closing operation.

In the operation of the system by the remote control valve 48 a movement of the lever 59 in a clockwise direction brings the plug of the valve into a position where the pressure suppl fluid asses through port 55 thence circum erentia y of the plug along the passage 62 out through port 52 to the pipe 31 to close the valve 1, the discharged fluid therefrom being brought upwardsthrough pipe 32 through the port 54 thence longitudinally of one of the passaagles 63 to the base of the recess 50 from w ence it passes through the port 56 in the centre of the recess and out through the discharge Tt will be noted that during the operation of the remote control valve the ports 51 and 53 are out of register with the plug passages 60 and 61 so that there is no flow through either of the pipes 36 and 37 or the pilot valve 33.

By moving the lever 59 in an anti-clockwise direction the peripheral passage 62 of the valve plug registers with the pressure supply port 55 an the port 54 to the pipe 32, and that the discharge flow from the main valve cylinder through pipe 31 passes through the control valve port 52 through one of the' assa 63, under the base of the plug and t roug the discharge port 56 and pipe 64, causing-the opening of. the main valve.

From the foregoin it will be seen that I have invented a hy raulic valve which is automatically operated and which can be controlled at any desired point remote therefrom.

What I claim as my invention is:

1. In a device of the class described comprising a main valve, a piston valve by which fluid pressure is admitted to o n or closesaid valve and a rope suspend float actuating said piston valve, a rope sheave having a tread comprising segments s aced apart and means dis osed between sai segments for frictions ly gripping the float rope.

2. In a device of the class described comprising a main valve adapted to be opened or closed b fluid pressure a ainst a piston therein an a float operated piston valve having flow and return ipes through. which the pressure is supplie to and discharged from o posite sides of the piston of the main va ve, a manually operated valve interposed between the piston valve and the main valve having an independent fluid pressure inlet and a fluid discharge outlet and means permitting an unrestricted flow of fluid through vsaid valve and flow, and return pipes to and from the main valve while the flow is shut off from the independent fluid pressure inlet anddischarge outlet of said manually operated valve.

3. In a device of the class described comprising a main valve adapted to be opened or closed by fluid pressure a ainst a piston therein and a float operate piston valve having flow and return ipes through which the pressure is supplie to and dlscharged of the manually operated valve to either side of the main valve piston and the return from the opposite side thereof through the discharge outlet of the manually operated valve. 7 v v 4. The combination with a liquid containing tank having a supply inlet beneath the li uid level, of a valve controlling the admission of liquid through the supply orifice adapted to be automatically operated by the rise and fall of the liquid in the tank and manually operated adj acent to the valve, and manually operated means for controlling the valve from a point remote therefrom.

Dated at Powell River, B. (3., this 26th day of February, 1924.

PERCY SANDWELL.

Witnesses: Y

R. D. Scorrr, R. A. BAKER.

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