US1557863A - Automatic cut-off-valve - Google Patents

Description

8. MRVOSH Oct. 20, 19125.

AUTOMATIC CIUT-OFF VALVE Filed April 21, 1925 3 Sheets-Sheet L Patented Got. 20, 1925. 7

uN TEo STATES.

m aw levee AT J'TQMATIC CUT-OFF-VLVE.

Application filed April 2L T 0 all whom. it may concern:

Be it known that BLAGGOYA MRvosH, a citizen ofthe United States,'residing at'Erie, in the county of Weld and StateofColorado,'has invented certain new and useful Improvements in Automatic Cut-Off Valves; and he does hereby declare the following to be a full, clear, and exact description of the invention, such as will enable others skilled inthe' art to which it appert'ains to make and "use the same.

This invention relates to valve structures and more particularly to automatic cut-off valves for pipe systems and the like for conveying fluids such as liquids, steam or'gases.

The object of the present invention is, to provide an improved device for controlling a cut-off valve in such manner that the valve willbe automatically and efficiently closed in the event and only in tlieeven't'of a'break in the pipe system or some other similar unforeseen accident permitting an abnormal flow of the fluid contents through the portion of the system in which the valveis'located.

Further objeets will more particularly appear in the course'of'the followingdetailed description. i

The invention consists in the novel construction, arrangemeiit" and c'ombination'of parts as hereinafterparticularly described a la med Three sheets of drawings accompany this specification as part thereof, inwhich like reference characters indicate similar parts Figure 1 is a plan view of the improved devicewith the cover removedfii Fig. 2 is a vertical longitudinal sectional viewtaken on line'2- 2 of Figure 1;

'Fig. 3 is a vertical transverse sectional view taken on line 3 3 of Figure 1;

Fig. 4 is a vertical transverse sectional view taken on line Hof Figure 1 Fig. 5 is' a fragmentaryv transverse vertical section taken on line 5'.5 of 'Figure 1; Fig. 6 is a fragmentary vertical longitudinal view taken on line 6-6 of Fig'ure 1.

Fig. 7 is adetailed view of valve'9.

In accordance with the present invention a suitable housing is provided preferably in theformof a casting, embodying a conduit 1, below a chamber 2,'the former adapted to be associated in alignment and in continuity with a pipe system for the conveyance of fluids, such as liquids, steam or gases. The conduit 1 is adapted to be closed as slide 1923. Serial No. 633,816.

gate valve 3 which is associated withasteni 3 slid'ably mounted in suitable 'bearings fp rovided in the frame, the stem 5. beingformed adjacent its upper end with rack teeth 27 adapted to be engaged by a pinion 4..

In the frame adjacent slide gate3 is provided a cylinder 6 in which 'operates a piston 6 provided adj acent its upper end with-rack teeth 28 adapted also to engage the teethof pinion 4c diametrically opposite the-stein 3?, The cylinder 6 communicates with conduitl, and is controlled with respect thereto by a slide valve 7 An exhaustpassage .8 is pro videdin the frame communicating cylinder 6 controlled by aslide valve 9. With the structure? thus far enumerated, and re ferrin'g to Fig. 2, it will be'noted that when the slide gate 3 is elevated pistonlti? will be correspondingly lowered'in cylinder 6 that when in this position the opening' of slide valve 7 will permit the pressureof the fluid contents ofconduit 1' whiletoperating on piston '6 to raise the'same, thus rotating pinion 4: and lowering stem 3* and thus closing slide gate 3 and closing the conduit.-

Adjacent slide gate 3, bjut onthe opposite side thereof with respect to the cylinder 6 provided a housing for a suitable impact wheel 10 the vanes 10 of'which are adapted to project at one circumferential point within conduit 1, as is well illustrated-in Fig. i. The impact'wheel 10 is secured to a vertical shaft '11 to the upper end of which is secured a bevel gear 29 adapted to mesh with a second bevel geareo securedto a horizontally mounted'sh aftlfl which is provided with a worm thread 31 having "a pitch and lead which will operate; in both directions adapted to meshx-withragear 13' mounted on a horizontally disposed shaft 14Qarra1iged-at right angles with shaft '12. Shaft 14' carries'a bevelgear'rlo adapted to mesh with the second bevelgea-r" 32 secured to a vertically mounted 'shaft'16'to the upper end ofwhich is secured a wheelor disc 18 provided with a single peripheral tooth 33. 7 In alignment with, but spaced fromtheshaft 1 i is another shaft'QO having on one end a gear 19' the teeth of which are-adapted to be engaged by the single peripheral tooth33 of wheel l8 as is'indi'cated in Fig. 2. v Secured to' shaft 20. is one-end oflwound spring 21 the other end of which is adjustably secured as by screw-21 to some suitable part of the frame. Also mounted on shaft 20 is a gear 22, the teeth of which are adapted to engage rack teeth upon a sliding rod 23 which is in turn pivoted to a lever -24.

adapted to engage a bell crank lever 25 the other arm of which is connected to the slid valves 7 and 9.

The structure thus enumerated operates as follows:

The passage of the fluid contents through conduit l'rotates by impact with vanes 10 wheel 10 which, through gears 29 and 30 worm thread 31 and gears 13, 15 and 32 roarranged as to make this'the normal, ordifeet through gear 22,-rack rod 23, bell crank nary operation of the device. The parts are further so proportioned that the partial rotation of gear 19 will have'no operative ef- 25, etc., upon the slide valves 7 and 9.

Upon any break in the pipe system, however, or any othercause producing an increased velocity in the fluid passing through conduit 1, the speed of rotation of wheel 10 will be greatly increased with a correspond ing marke'dincrease'in the speed of wheel 18 by reason of which increased speed of rotation of wheel 18 theperipheral tooth 33 will reengage gear 19 before spring 21 can operate to return gear 19 to its normal position,

with the result that gear 19 will be rotated by successive rapidimpaets of the peripheral tooth 33 to give a pronounced longitudinal lllOtlOll to rack rod 23 and thence through bell crank 25 to operate slide'valves 7 and 9 to open slide 7 and close slide 9, thus per rnitting the pressure of the fluid in conduit 1 to operate upon the piston 6* as previously described to close the slide gate 3.

The slide gate 3 having been thus automatieally closed, the following structure is provided to reopen the gate:

The pinion 4 which is interposed between the valve stem 3 and piston 6 is mounted upon a spindle 36, upon one end of which is secured a strong wound spring 41 operative to wind upon the lowering of valve stem 3 Upon the other end of spindle 36 is fixed a ratchet 37 adapted to be engaged by a dog 3 38 pivoted in lever 39 suitably pivoted to the frame as at 40 the lower end of which lever is formed to provide a connection between the slide valves 7- and 9. This structure is so arranged and proportioned that when the slide gate 3 has been lowered, as in Fig. 2, spring 41 will be tightly wound,.and by reason of the operation of the slide valves 7 and 9 through hell crank 25 lever 39 will have been thrown upwardly as indicated in dotted lines in Fig. 5, the dog 38 permitting the rotation of ratchet 37 as operated by pinion 4 but preventing its rotation in the opposite direction by spring 41.

It being desired to reopen gate 3, lever 39 would be pulled back to the position illus trated in full lines in Fig. 5, whereupon, slide valve 7 would be closed 'andslide valve 9 would be open, permitting the escape of the contents of cylinder 6 through port 8, and also permitting rotation of ratchet 37 by reason of the force of spring 36,thus rotating pinion 4 to raise valve stem 3 to lift slide gate 3.

Various modifications in the precise form and arrangement of parts will readily suggest themselves to those skilled in the art, but all within the scope of the present invention as claimed.

Having thus fully disclosed my invention, I claim:

1. An automatic cut-off valve comprising in combination a conduit, an impact device associated with the conduit and adapted to be operated by the passage of a fluid therethrough, a valve inthe conduit, and means operated by the impact device for-operating the valve, said last mentioned means including a lost motion device through which the normal operation of the impact, device will not affectthe valve but an abnormal speeding up of the impact device will operate the valve. I

2. An automatic cut-01f valve comprising in combination a conduit, an impact device associated with the conduit adapted to be operated by the passage of a fluid therethrough, a valve in the conduit and means operated by the impact device for operating the valve, said last mentioned means including a resiliently controlled gear and an intermittent contact for operating of. said gear. 4

3. An automatic cut-off valve comprising in combination a conduit, a vaned wheel having vanes projecting into the conduit, a valve in the conduit and means for operating the "alve including means responsive to pressure in the conduit and means controlling the appli ation of said pressure to said operative means including a lost motion connection with said vaned wheel.

In testimony whereof I affix my signature.

' BLAGGOYA MRVOSI-I.

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