US2527760A

US2527760A - Filling nozzle for liquids with automatic limitation of the level of the liquid and automatic resetting

Info

Publication number: US2527760A
Application number: US602111A
Authority: US
Inventors: Piquerez Emile
Original assignee: Tecalemit SA Soc
Current assignee: Dite Tecalemit SA Ste; Tecalemit SA Soc
Priority date: 1944-01-13
Filing date: 1945-06-28
Publication date: 1950-10-31
Anticipated expiration: 1967-10-31

Description

Oct. 31, 1950 E. PIQUEREZ 2,527,760 FILLING NOZZLE FOR LIQUIDS wrm AUTOMATIC LIMITATION OF THE LEVEL OF THE LIQUID AND AUTOMATIC RESETTING Filed June 28, 1945 ,Z'nvenZon ImiZe lyaerez z? mweys fiatentelzl Oct.

FILLING NOZZLE FOR LIQUIDS WITH AUTO- MATIC LIMITATION OF THE LEVEL OF THE LIQUID AND AUTOMATIC RESETTING Emile Piquerea, St. Cloud, France, assignor to Societe ditez' Paris, France Tecalemit, Soeiete Anonyme,

Application June 28, 1945 Serial No. 602,111 1 In France January 13, 1944 Section 1, Public Law 690, August 8, 1946 Patent expires January 13, 1964 In engineering, it is often necessary,'when-.filling reservoirs or receptacles with a liquid by means of pipes, to ensure an'automatic limitation of the filling height.

This result can be obtained in different ways, for example, by making use of the momentum of the flow of liquid on more or less complicated reversing devices for closing the closure member. In particular, it is known to secure the closing of an admission valve or of a similar member by means of a reduction of pressure formed by a suction member, for example, a liquid jet device composed of an injector and a nozzle, operating by reason of the passage of the liquid. Devices of this kind are described in French Patents No. 804,710 of July 25, 1935, in the name of Emile Piquerez for Automatic limiting device for the filling of all'rs'ervoirs, cisterns, etc. and 837,673 of'October 29; 1937, in the nameoi Emile Piquerez forz Fillin'g apparatus for all reservoirs with I automatic limitation of the liquid'level.

During the operation of these devices, the passage of the liquid in the suction member must not produceany substantial reduction of pressure but; at the moment whenthe level of the liquid in the' reservoirreaches this suction member, a. reduction of'pressure issuddenly produced and is made use of ier producing "closin'gof the closure member. Apparatus of the type in question are also known in which the suction member is combined witha'nother conduit connected to the liquid supply and closed in the position of rest by suitably loaded exhaust valve which opens automatically as soon as the pressure inthe liquid conduit has reached a certain value; in this-manner the suction member always has a sufiicient flow to enable it to-work properly, the flow surplus -flowing directly',thr'ough the said conduit, when the pressurerises= above'the force by which the exhaust valve isloaded.

In' this latter type of apparatus, described in French Patent No. 855,052 of January 12, 1939, in' the name of the present applicant, for: Self limiting filling apparatus, the operation is ensured in spite of the important variations in the flow, whereby an apparatus having a large output, can

be designed'which retains its sensitiveness forvery smalloutputs; 7

Every limitingiapparatus of the above type-is constructed-so as:.to be mounted at the end of field of use of the limiting apparatus which must 4 Claims. (Cl. 226127) always remain accessible, or the resetting of must be remotely controlled.

The object of the invention is to provide a limiting apparatus in which the resetting is effected in an automatic manner as soon as the pressure is removed in the-replenishing pipe and which can therefore be permanently mounted On the reservoirto be filled, even at an inaccessible point.

In order to ensure closing of the closure mem ber, the filling device with automatic limitation of the liquid level, according to the invention, makes use of a suction member through which which passes at least a portion of the liquid and producing, when the predetermined level is reached, a reduction-of pressure which acts on a movable wall controlling the'locking device of the closing member. It is notable that this closing member is subjected to the action of the liquid pressure actingin the direction of closing and to a resilient oppositelyacting force acting in the direction oif In a preferred and exemplary embodiment of v the new limiting device:

The closure member is subjected, in the opposite direction to the fluid pressure, to the action of a' spring controlling the exhaust valve. A damping movable wallchamber and the reservoir to be outside the ,passage of the liquid. Other advantages and characteristics will side the reservoir to be filled.

, In thisa'pparatus, which is of the type by-means 1 of which it is possible to obtain a'precises limita-, tion of level with widely different outputs, the closuremember l is mounted in such a manner that it can slide axially inaboring'z oi the body; 3 ofthe limiting device; whilst the suction mem-f ber, composed in knownfmanner, of the' injector land the nozzle 5,;is itself fixed, co-axially, in a rear wall 6 of thebody 3 exhibiting openings 1,

' for'the' passage of the replenishing liquid.

The 'body 3 is provided, at its front portion-{ pear from the description about to be given in. reference to the accompanying drawing, given by: way of example, in which the sole figure shows, in axial section a limiting device according to the? invention arranged along a -horizontal plane intween the space 9 situated between the injector; 4 and the nozzle 5 on the one hand, and the chamber 18 provided with the movable wall II. The movable wall H carries, on the side opposite the chamber H), a finger H? for locking the closure member 1. The said member I is provided, for this purpose, with a shoulder 13 hearing on the side surface of the finger i2 and a reduced diameter portion Hi the end 15 of which constitutes the seat of the exhaust valve 66. This valve it is slidably mounted on the tail H of the injector 4 and is subjected to the action of a resilient force, in the present case to the force of a coil spring !8 bearing on the rear wall 6 oi the body 3 limiting device The body 3 of the limiting device is provided with a flange iilto enable it to be secured to one of the walls 2d of the reservoir R- to be filled.

Onithe rear Wall 6 of the body3 of the limiting devicev is mounted a duct .21 enabling air to be exchanged between the duct 8, putting into communication the space 9 andthe reduced pressure chamber I6 having the movable wall, and the atmosphere of the reservoir R, with a View to maintaining the pressure prevailingin the depression chamber iflandthe reservoir R at the same value, even in the casewhere the suction member pro duces an undue reduction oi pressure in the said chamber, for example in the event of an air ocket ur n at t eo i of h c r 4-..

It should be pointed out that the duct 2i is not shqwa e m nvins dr in e DQ- s ition which it shouldractually occupy. In the example shown, the limiting device is arranged si ns. a h ri t ane and ed i ti s ii' ates, in eal t t ese-me o iz nta lass a the suction member 4--5 so that it is submerged atlthejsametime as thejlatter, when the predereservoir R. A duct 22'isfalso secured to the fixedrear; wall d amet r-5 a 1 7 reservoir R and the equalization chamber lj of -.Qn t e s e o p s time rea fwall ,6. e

and fan inner washer 43havi'ng a diametersuch that it can move. axially'with slight play inside the chamber 26. The innerwashe'r 43 is provided- With a number of apertures 28. The outer Washer 21 is held by a shoulderat the end-of a tail 29 fixed with respect to the closing member I, whilst the inner washer 43 is mounted, with axial play, between the outer washer 27 and a Washer 38 held by a shoulder On the tail 29.

fThe members 21 2B, and "are combined so asgto operate after the 'fashionof a dashpot for hydraulically braking the movement of the stop"? member! when itis unlatch'edlf V The edge 24 and the bot'tomf2 5, situatedon the same vertical plane, serveasbearing surface for the outer surface of the wall 3] of the closing member I. This latter, in the form of acylindritermined filling level N hastbeen reached irrthe 4 cal slide' valve, has in its side wall, openings 32 for the ingress of the liquid, The bottomj'25 is provided with an extending flange portion'wh'ich, onthe'inmr side, forms a bearing surface 44 which bears, in the closed position of the closure member I, against the seat 42 of the body 3 of the limiting device.

of the I JA deflector 33. is disposed at the outlet of the limiting device. in order to maintain the suction member outside the passage of the liquid. Finally, a connection pipe 34 is provided for receiving the feed pipe for the liquid to be transferred. According to the drawing, this is a right angled connection pipe mounted on the flange IQ of thebody'3 of the limiting device.

When proceeding to the filling of the reservoir R, the limiting device with all its parts in the position as shown in the drawing, the operation is as follows:

The free end of the feed pipe is filled to the inlet .3 5 of the connection-pipe 3,4. and theliquid under pres'sureis allowed tov flow in the directioni ofthe, reservoir R. V

As soon as the liquid reaches the.limiting,.de'-.

. vice, it enters, through the openings 32,- inside theclosuremember l,. Theiactual pressureoisthe". liquid then acting on the difierence between the; areas existing between the outlet valve [6 and the; stopmembei; I, which is, now released, carries the latter-along and ittends to. strikeabruptly against, the sea-i142. It is at this instant that the, shock; absorber comes into play, said shock, absorber be: ing constituted of the hydraulic device 26, 21, '43 th -pu pos of wh ch is tc-retard-th cl sureand preventthe water-hammer blows which wouldbe: produced if -the closure weresudden. 1 D e, tofih y preva insbetwe t e bore, of: he ch mb 1 a d t e. outer-washer 21. the. ui a, ur nsa efiowgw l sli ht y: m vest s; nn ash r 43; (Whichhears as i tthe'w her, 30) and, as it passes through-the apertures lil fill the axial chamber 26.

n s, th e unlatched stop member moves abruptly tcwardstn right, as;viewed.inthe drawing, its movement is braked hydraulically by the liquid-j stesse e heha r? andw i can-onl eases? le l h h the ar qusl a eee at s pres nt; b tween the 'rnembers of the hydraulic brels issi i a.

ess Ts t an r s ,Eithe},the. f low is a weak one, the pressureof; which; is not suificiently high to, dislodge from its; seatifi ltheexhaust valve 5 subjected to the "force. oi thespring l,-8 and in thisfirst case, the .liquid ilows into .thelreservoir through, thesuction membe'-, 5. f i

O' "liquid pressure (large o l ipl tsi exrieeds; bs-i s i hs ri 1 8. whi hna r; ea; hasst al. .7 B mo es w y qm sis; s at. 1.5. nd i, the excess liquid passes directly into the reserei -Bf h li h i gnas s a h beds-s 3 o th i t vi wh shan ase ocated by:

the dei lectop33, at a lowerg-levelthan the suction member 4-5. c st av he e m ersfirs. and being submerged-in the-gush caused byi bsngre the i :Inbo bi a es;themes. ure filisa ui ct iom he closure member n? prevented from moving by theelncigsji until the predetermined level zN-coi ,fillingis reached, fyWh en gthe reservoir R. iszfilled'tto' 'aipredetere' mined vel; the limiting device occupiesv the ,clos- .11 zllqfilt qllawifih the support surface. 445 bearing i against the-seat 4.2.150 long asipressureis main tained: ftheinletpipe:(not shown) As soon-as l 75, thepressnre dies '.do.wn',;ithel movable unit com posed of the stop member I and the outlet valve I6 is brought back, solely by the expansion of spring I8, to the position shown in the drawing and the lug I2, which is integral with the movable wall H, under the action of spring 45 as it expands, resumes the position in which it latches the stop member I. The resetting of the limiting device is thus insured without requiring any manualoperation and the apparatus thus consti-' holding said closure in open position when the liquid is below a predetermined level, a diaphragm connected with said latch, a suction device having an inlet located in the flow of liquid in the chamher and an outlet in the vessel, a duct connecting the suction device to one side of the diaphragm, and a deflector for deflecting the liquid flowing into the vessel from said chamber away from the outlet of the suction device.

2. Control mechanism for controlling the level of liquid in a vessel comprising, a casing having an inlet and an outlet through which liquid flows to the vessel, the outlet being located in the vessel at the liquid level to be maintained, said casing having a bore formed therein and a closure seat at its forward end, a slidable cylindrical closure member in said boreand having a closed forward end provided with a flange for engaging the closure seat when moved rearwardly into closed position, said closure member having a valve seat located at its after end and encompassing a smaller area than the closure seat, a valve located adjacent said valve seat, spring means tending to press said valve forwardly into contact with the valve seat and thus slide the closure member to open position, a suction device having an inlet open to flow of liquid in the closure member, having an outlet into the vessel, and 7 having an intermediate reduced pressure chamber, a diaphragm adjacent the casing, a latch connected with said diaphragm, spring means tending to press the diaphragm toward the closure member to hold the latch in position to latch the closure member in open position, a duct connecting the reduced pressure chamber of the suction device with the side of the diaphragm opposite the latch, a second duct connecting said first duct with the vessel at the liquid level to be main! tained, a third duct connecting the latch side of the diaphragm with the vessel at a higher level than the second duct, and a shield extending partially across the outlet of the casing for main-- taining the suction device outside the liquid passing out of the chamber, whereby when the liquid in the vessel reaches the level of said second duct and obstructs gaseous flow therethrough, the suction device abruptly creates a reduced pressure on one side of the diaphragm and withdraws the latch from the closure member, thereby permitting the closure member to close under the influence of the flowing liquid, and then to automatically open under the influence of the valve spring when the flow has stopped.

3. In an automatically operating liquid levellimiting filling apparatus for filling a container to a predetermined level, a tubular casing for extending downwardly into the container and serving as a conduit for supplying liquid to said container, said casing having an inlet for liquid and a plurality of openings leading into the container, at least one of said openings leading into the container having a shape which generates a reduced pressure forwardly thereof by the flow of liquid therethrough, a pressure responsive movable wall subjected on one side to the said reduced pressure, one of said openings leading to the container having a tube extending into the container and being connected to the said one side of said movable wall to relieve said reduced pressure when the liquid level is below the predetermined level but being closed by the liquid when it reaches the predetermined level, valve means in said tubular casing influenced to closed position by the flow of liquid through the casing, said movable wall having a latch engaging said valve means to latch the valve means in open position before the level of liquid has attained said predetermined level, spring means for pressing said movable wall and latch means into position to hold said valve means open, whereby when the liquid level in said container reaches the predetermined level the opening into the container which is connected to the said one side of said movable wall is closed by the liquid and the relief of the reduced pressure is no longer effected, whereupon the reduced pressure becomes efiective to move the movable wall and its latch into a position to allow the valve means, under the influenceof the flow of liquid, to move into closed position to close ofi the flow of liquid into the container.

4. An automatically operating liquid level-limiting filling apparatus according to claim 3 and in which another of said openings leading into the container is provided with a tube extending into the container and terminating in the container at a level higher than that at which the tube of said one opening extends, said other opening is connected to the other side of said movable wall so as to supply pressure thereto for assisting in moving said wall and its latch into releasing position.

EMILE PIQUEREZ.

REFERENCES CITED The following references are of record in the file of this patent: V

UNITED STATES PATENTS Number Name Date 2,271,557 7 Killman et a1 Feb. 3, 1942 2,326,251 Piquerez Aug. 10, 1943 2,388,852 Killman Nov. 13, 1945