US920099A - Relief-valve for the supply-pipes for water-motors. - Google Patents

Description

H. E. WARREN.

RELIEF VALVE FEE THE SUPPLY PIPES FOR WATER MOTORS.

APPLICATION FILED JUNE 21, 190B Patented Apr. 27, 1909.

IN VENTOR' WITNESSES UNITED STATES PriTENT OFFICE.

HENRY E. WARREN,.OF ASHLAN D, MASSACHUSETTS, ASSIGNOR TO THE LOMBARD GOVERNOR COMPANY, OF ASHLAND, MASSACHUSETTS, A CORPORATION OF NEW JERSEY.

RE LIEF-VALVE FOR THE SUPPLY-PIPES FOR WATER-MOTORS.

Specification of Letters Patent.

Patented April 27, 1909.

Application filed June 27, 1908. Serial No. 440,658.

To all whom it may concern:

Be it known thatI, HENRY E. WARREN, a. citizen of the United States of America, and a resident of Ashland, in the county of Middlesex and Commonwealth of Massachusetts, have invented certain Improvements in ReliefValves for the. Supply- Pipes for Water-Motors, of which the following is a specification.

This invention relates torelief valves for the water supply 'pi 'es for water-motors, more particu arly w ere the pipe line is 1t consistsof a valve which is k of his valve is connected directly with the means by which the governor or controller operates the water-supply ate and in such manner as to cause the relief valve to be opened in proportion'to the amount that the water gate is closed,

and the closing of the valve is then controlled by its connection with mechanical means which have a constant speed in the properdirection to permit thevalve to close only very slowly, thus obviatin all sudden strain uponthe supply pipe an preventing the injurious hammer due to the effect of quickl arresting-the movement of the column 0 water therein..

My improved construction obviates the waste of water which occurs in constructions where such valve is normally partly open; and also by the direct connection of the reliefvalve with the gate controller mech-.

anism, the valve is quickly and immediately opened in proportion to every closing move ment of the water-motor gate, however slight, and the valve is then controlled in its closing movement by mechanism which acts at a constantspeed and independently of the movement of the water gate.

In the drawings Figure 1 shows the im proved mechanism foroperating the relief- Fig.

valve, all assembled and connected with the motor casing and controller for the motor; 2, is a detail showing the connection between the rod which extends from the controller to the water- Referring to the drawings, M represents "a part of'a' motor casing or end of the sup- P y-P p at G the lever of thewater-gate for the m0t0r, and bv means of a rod 0 the .re-

located closely beside it.

te' lever, and av the controller spective ends of which are pivotally con nected at and c to the lever G and a controller l), the water-gate is operated by the latter. Themovement of the controller D is regulated by the speed of the centrifugal governor A which is driven by the prime motor. To the water supply pipe penstock or casing of the motor, a valve is applied. This .is of the balanced valve type with one puppet p larger than the other p, and arran ed so that the pressure of the water upon t e larger puppet 2 constantlytends to close the valve. The stem 8 of the valve extends out of the casing and ,is pivoted to one end of a slotted link E.

To the other end of this link a guide rod 8' is pivoted, the end of this'rod sliding in a fixed support 8 A floating lever F passes through the slot in thelink E' and is pivoted thereto at e". The upper end of the lever F is connected to the rod C by a pin f which passes through a vertically elongated hole f in said lever and the lower. end of the lever F is pivoted at It to a'link H, which link is pivoted to a rack-bar R. In operation, the movement of the red C in a vertical plane is very small. so that a short slot only, at f", need be made in the lever'F. This rack engages a pinion.

I secured toe ratchet disk K, both of which turn freely on a shaft L. The rack R is held in contact with the pinion I by menus theapparatus, not shown. a

Secured upon the shaft L is a gear 0 of greater diameter than the, ratchet K, and Upon-the face of the gear 0 next to the ratchet K, a series of spring controlled pawls P are pivoted, in proper osition to bear upon the teeth of: the rate et K, and by varyin the distances between these pawls it-will a possible to turn the ratchet K in a' direction toward the i of bearing rolls n supported in the frame of oints of the pawls, but a very small amount independently of the gear 0. This gear is driven by a worm by gear connection .With an independent motor T, as illustrated, or by other convenient means.

As an illustration of'the operati n of the apparatus, assume that the valve is closed and (tihe water wheel gate'is open f0 normal s cc ii a sudden diminution ,of the load .occurs D will immediately-move the W, which may be turned with the normal l'o'ad on the wheel;

rod C and gate lever G to the right, and tend to close the water-motor gate, thus re (luciug theamount of water supplied to the motor to meet the chan e in load. This movement of the rod 0 wi l at the same time give a quick movement of the upper end of the floating lever F to the right. During this quick movement of the upper end of the lever F, the pivot h at its lower end is practically a stationary fulcrum, and consequently the pivot e with the link E, and puppets p, p of the valve V, will he pulled to the right and open the valve proportionately to the amount that the Water-gate is i rack-bar R, the valve I will cause closed,'thus afi'hrding an outlet for substantia'lly the same amount ofwater as has been cut off by the elosine of the gate and prevent any shock to t c pipe line b ofsuch closin for no substantial c ange in the velocity 0 the column of water will have occurred.

' As heretofore stated, by reason of the greater surface area of the puppet p over that of fpuppet p, the valve V would quickly but through the connection of the valve stem with the lever F -lose,i unrestrained,

the lower end of which is attached to the can close or move to thelcft only 'as'fast as the rack R moves in that direction, provided the rod C remains stationary.

The worm W is turned so as to rotate the gear 0 slowly to he left, as indicated by the arrow. As sooitherefore, as the valve V in its effort to closehegins topull the rack R to the left, its engagement withthe pinion that pinion with its attached ratchet disk K to rotate in the same direction that the ar 0 isturningand independently of t iit ear, until a tooth of the ratchet Kis'broug the pawls P, when the ratchet and pinion I wil be constrained to rotate at' the same speed as that ofthe gear 0, and the rackbar R. will also be restrained from moving to theleft'any faster than the. rotation of the pinion I'will permit, consequently the valve will be caused to close very slowly and prevent any injurious shock to the water supgate because of a decrease in speed due to an increase of'load, the lever F will imme- -the pawls P easily riding over t to bear against one o'f ratchet diately close the valve V, if open, a. d then 56 turning on the point. e as a fulcrum, thelower end of the lever will push the rack bar It to the right, the pinion I and ratchet disk K turning freely in a direction opposite to that in which the gear 0 V the ratchet teeth.

I claim 1. In combination with the penstock or supply pipe of a'water Wheel, a controller for the water-supply gate, aself-closing outlet valve connected with the supply pipe, in- C terconnecting operatin means between the valve and the centre ler connection with the water-gate, to open ically operated mechanism to control the valve and cause it to close slowly whenever opened.

2. In combination with-a self-closing relief-valve for a water-motor supply pipe, means connecting said valve with the watergate operating mechanism to open the valve proportionately tothe closing of the gate,

and a freely roa positively driven device, tatin'g device upon the same shaft, means upon the driven device to engage the freely rotating device and limit its movement in one direction to the speed of the driven device, and mechanism which nectssaid freely rotatingidevice with the valve operatingmeans, to regulate the closing movement of thevalve to the limited movement of such device, but to permit free and unrestricted movement of the valve when opening.

3. In combination with a self-closing re lief-valve fora water-motor sup ly'pipe, means connecting said valve with tlie watergate operating mechanism proportionately to the closln positive driven disk, a reely rotating isk, pawls upon the driven. disk to engage the ratchet disk' and limit its speed of rotation to'that of the direction, and means which operatively connect the ratchet disk with the relief valve to control its closing movement.

I HENRY E. \VARREN.

Witnesses:

I. B. Dooon,

C, W. MCCAUL.

1S turning, 60

the valve in propor 70 'tion to the closing of the gate, and mechanoperatively con- 85 to open the-valve of the gate, a

driven disk in one

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