CA1243863A - Pilot operated coolant control valves in manifold assembly - Google Patents
Pilot operated coolant control valves in manifold assemblyInfo
- Publication number
- CA1243863A CA1243863A CA000495049A CA495049A CA1243863A CA 1243863 A CA1243863 A CA 1243863A CA 000495049 A CA000495049 A CA 000495049A CA 495049 A CA495049 A CA 495049A CA 1243863 A CA1243863 A CA 1243863A
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- valve
- coil
- control valves
- solenoid
- electrical
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Abstract
ABSTRACT OF THE DISCLOSURE
Pilot operated coolant control valves in a manifold assembly for supplying a coolant, said coolant control valves comprising removable cartridges positioned in apertures in said manifold assembly, each of said cartridges having a valve body, a valve seat and a movable valve element, a solenoid plunger having valve elements on its ends in said valve body controlling passageways communicating with said valve body and said manifold and the atmosphere respectively, and a solenoid coil for moving said solenoid plunger whereby coolant in said manifold moves said solenoid plunger when said solenoid coil is de-energized against the passageway communicating with the atmosphere to maintain said valve element in closed position.
Pilot operated coolant control valves in a manifold assembly for supplying a coolant, said coolant control valves comprising removable cartridges positioned in apertures in said manifold assembly, each of said cartridges having a valve body, a valve seat and a movable valve element, a solenoid plunger having valve elements on its ends in said valve body controlling passageways communicating with said valve body and said manifold and the atmosphere respectively, and a solenoid coil for moving said solenoid plunger whereby coolant in said manifold moves said solenoid plunger when said solenoid coil is de-energized against the passageway communicating with the atmosphere to maintain said valve element in closed position.
Description
3~3 PILOT OPERATED COOLANT CONTROL VALVES
IN MANIFOLD ASSEMBLY
Backgroulld Or the Invention Technical Field:
This invention relates -to rolling mills in general and more particularly to rolling mills where aluminum is being reduced to thin gauge sheets and still more particularly to coolant applying devices -for said lolling mills.
Description of the Prior Art:
Prior coolant applying devices used on rolling mills have arranged elongated maniiolds parallel with the work and backup rolls oi the rolling mill and directed ~luids, such as kerosene, through individual spray nozzles on the mani~olds against the rolls o~ the mlll to provide temperature control and lubrication during the rolling opera-tion. The known prior art patents are Nos. 3,880,358, 4,4~7,047 and 4,400,961.
Several prior art pa-tents relate to pilot operated con-trol valves including Nos. 3,145,967, 3,159,374 and 4,391,296. In each o-~ these pa-ten-ts, solenoicl operated ~,,, ~,"., 3~163 valves are disclosed which theorectically control fluid directed therethrough.
In Patent 3,145,967 an elastic sleeve is arranged in spaced relation about a core positioned in a rluid passageway to be controlled. An annular cavity in the valve around the exterior sur-face Oe the elastic sleeve enables air pressure to be introduced so as to distort -the plastic sleeve inwardly against the core and thus close the -fluid passageway. The air pressure is contro]led by a solenoid opera-ted valve.
In Pa-tent 3,159,374, a f]exible diaphragm is positioned to intercep-t a -f]uid passageway through the valve when fluid pressure is applied to one side o-f the diaphragm so as to distort the same into closing relation to the fluid passageway controlled thereby. The fluid pressure -for operating the diaphragm is controlled by a solenoid valve.
Paten-t 4,391,29~ discloses a valve in which a valve plug moves into and out of closing relation with respect to a -fluid passageway extending between an in]ct por-t and an outle-t por-t wi-th the valve plug being urged to 3~3 closed posi-tion in the fluid passageway by a spring and moved to open position by a solenoid. A piston is positioned in an extension of the fluid passageway and a secondary inlet por-t is in communication with the -1uid passageway below the pis-ton so that manual operation of the valve can be achieved by introducing hydraulic pressure into the second inlet port so as to move the piston in the fluid passageway where it will engage and open -the valve plug.
The present invention is dependent upon the positive control of the coolan-t by each of the plurality of pilot operated valves in the manifold assembly. These valves must shut off instantly, as :Eor example when a -1ash ~ire occurs and -the continued spraying of the coolan-t liquid, such as kerosene, would feed the fire and destory -the rolling mill. The prior art pilot operated control valves are unable to e-ffect instantaneous posi-tive shut-off action and are subject to faul-ty operation due to dir-t or particles of foreign materials in the coolan-t supply.
The prior art coolan-t con-trol valves generally do not ~31~3~3 fail sa-fe whi.ch is extremely important when the cool.ant, whi.ch is commonly kerosene, is -flammable. Generally~
-the prior ar-t coolant valves require complete disman-tling of the valve bodies and the operab]e parts whereas in the present inven-tion the va].ve bodies defining the valve seats and the movab.Le valve elements -take -the -form of quickly and easily removable cartridges and due to their novel construction and opera-ting pa-tterns are able -to operate successfully and close comp:Letely and quickly despite the presence of dirt and/or foreign ma-terials in the coolan-t supply.
This invention eliminates the problems tha-t here-tofore existed in connection wi-th pilo-t operated coolan-t control valves arranged in and supplied by manifold assemblies.
Summary of the Invention A pilot operated coolant control valve assembly on a coo].ant control manifold provides a plurality of fail-safe valve elements in removable car-tri.dge-like assemblies con-trolling the supply of coolan-t, such as kerosene to individual spray nozzles direc-ted at rolling mill rolls and -the l:ike. Each ~3~;3 of the multiple coolant control valves is operable to open position by solenoids incorporated therein and operable -to closed position by de-energization of the solenoids and the resultan-t hydraulic actua-tion o-f the pilot valve elements by the collant. Ins-tan-taneous shut-down o-f the coolan-t spray means is therefore achieved by simple de-energiza-tion O e the several solenoids controlling the pilo-t ~a~ves, which in turn con-trol the coolant con-trol valves which control the coolant supplied the spray nozzles o-f the manifold assembly.
Descrip-tion of the Drawings Figure 1 is a symbolic illustration of a pair o-f work lol.ls and associa-ted backup rolls of a. rolling mill with a fluid collecting trough -therebelow and several fluid spraying mani-foldassembli.es therebeside;
Figure 2 is a perspective eleva-tion of a plurality of coolant control valves on a manifold assembly;
Figure 3 is an exploded perspective eleva-tion of one O:e the coolan-t control valves, a body member, a nozz.le plate, a coolant valve body valve element for opera-tion therein and a pair of solenoid opera-ted pilot valves wi-th par-ts broken away and par-ts in cross section;
~2~3~i3 Figure ~ is a perspective view of the reverse side o-f the valve body seen in Figure 3 of the drawings;
Figure 5 is a cross sectional elevation transversely of the control valve and manifold assembly of Figure 2 with parts broken away and parts in cross section;
Figure 6 is a side eleva-tion of one of the coolant valve assemblies and opera-ting solenoids of Figure S wi-th parts broken away and parts in cross section; and Figure 7 is a side eleva-tion of one of the coolant valves of Figure 5 with parts broken away and parts in cross section and illus-trating the wiring for operating the solenoid pilot valve thereof.
Description of the Preferred Embodiment By referring to Fi.gure 1 of the drawings, it will be seen -that a diagramma-tic illustration of a rolling mill discloses superimposed work rolls 10 and 11 engagcd on a pass line 12 and having backup rolls 13 and 1~ as will be understood by those skilled in the ar-t.
Means for driving the rolls is not illustrated. A
coolant collec-tion trough 15 is shown and :Eour.vertically spaced coolant con-trol valve manifold assemblies 16 are shown positioned in spaced relation to the work rolls 10 and 11 and the backup rolls 13 and 1~. Means for circulating a coolant fluid such as kerosene from the colleeting -trough 15 to the mani-folcl assembly 16 is indicated by broken lines 17.
By referring to Figure 2 o-f the drawings, a perspec-tive elevation of one of the coolan-t control valve manifold assemblies 16 may be seen and it is formed of an elollgated housing 18 closed at i-ts ends 19 and 20 and provided with end ex-tensions 21 and 22 including moun-ting and ad~jus-tment plates 23 and 2~ by which the housing 18 is suppor-ted adjacent a roll of a rolling mill as hereinbefore described in connection.with Figure 1 of the drawings.
Inlet ports 25, see Figure 5, comprise means for deliver-ing a coolant, such as kerosene -thereinto and a plurality of body members 26 are sealingly at-tached to an open side of the housing 18 ancl carry nozzle pla-tes 27, each of which carries one or more spray nozzles 28 -through which coolan-t is selectively directed to the rolls of -the rolling mill in ~3~63 desirable volume and spray pattern.
A horizontal section -through one of the elongated housings 18 and one of -the pilot operated coolan-t control valve assemblies secured thereto is seen in Figure 5 o-~ the drawings.
By referring now -to Figures 3,4 and 5 of the drawings, it will be seen that each o-f the plurality of pilot operated coolant control valves is moun-ted in apertures 29 in each of -the body members 26 and -tha-t each of the coolant c-on-trol valves comprises a cylindrical valve body 30 having several openings 32 circumferentially spaced therein. Several annular seals, such as 0-rings 33 are carried in annular grooves in the cylindrical valve body 30 which sealingly engage the apertures 29 in the bocly member 26 and a cross sectionally circular cavity 34 in each of a plurali-ty of coil car-tridge bodies 35.
By referring to Figure 5 in particular, it will be seen -that each of -the coil car-tridge bodies 35 has several openings 36 therein which communicate with the cross sectionally circular cavi-ty 34 therein and each of the bodies 3~63 35 is provided with an annular ilange 37 on one end which registers in an annular cavity 38 in the body member 26.
Annular seals such as 0-rings 39 are positioned be-tween -the annular flanges 37 of the coil cartridge bodies 35 and the open side of the elongated housing 18.
Re~erring again -to Figures 3,4 and 5 of the drawings, it will be seen tha-t a cylindrical valve element 40 having a closed conical end 41 is movably positioned in the cylindrical valve body 30 so as to be movable therein relative to the openings 32 in the area of reduced diameter 31 of -the cylindrical valve body 30. It will also be seen that the inner diameter Or the cylindrical valve body 30 is increased in the area -thereof in which the cylindrical valve element 40 is slidably moun-ted and that a portion of the closed conical end 41 of the valve element 40 is posi-tioned in the enlarged inner area when the valve element 40 is in closed rela-tion to the hollow interior of the cylindrical val-ve body 30 as best shown in Figure 5 of the drawings. A spri.ng 42 is positioned within -the cy~indrical valve body 40 and engaged against the inner _~ _ ~3~3 surface o-f -the closed end 41 thereof and agairlst a cen-trally aper-tured disc 43 which is secured in one end of -the cylindrical valve body 30.
By again rererring -to Figure 5 of the drawings, it will be observed that a passageway 45 establishes communication between -the inner end Oe the cross sectionally circular cavity 34 in the cartridge carrying body 35 and a pilo-t valve chamber 46 therein. A solenoid plunger 47 is movably disposed in a sleeve 48 which de-fines part of the pilot valve chamber 46 and which sleeve 48 is positioned within a solenoid coil 49 which is encapsulated by a suitable resin 50 which holds -the solenoid coil 49 in an enlarged cavity 51 in the coil cartridge body 35. The sleeve 48 has a collar 52 posi-tioned on -the end thereof opposite the pilo-t valve chamber 46 therein and a passageway 53 in the sleeve ~8 communicates with the opening defined by the collar 52 which thereby es-tablishes communication with the in-terior of the elonga-ted housing 18 forming the manifold of -the device.
S-till referring to Figure 5 O:e the drawi.ngs, it will be seen tha-t -the plunger 47 has secondary valve elements comprising resilient seals in each of its opposi-te ends, one of which will engage and close -the passageway 53 when the plunger 47 moves -to the right responsive to energization o~ the coil 49. The seal in the opposite end of the plunger 47 engages and closes an opening in a pilot valve seat 54 when the coil 49 is de-energized and a spr:ing and fluld pressure of the coolant in the e]ongated housing 18 moves the plunger 47 to the left as illus-tra-ted in Figure 5 oE the drawings. When -this occurs, the fluid pressure extends through the pilo-t valve chamber 46, the passageway 45, and communicates wi-th the in-terior of the cylindrical valve body 30 and the in-terior o-f the cylindrical valve element 40 therein and with the added urging oi the spring 42 moves the conical end closure 4~ oi the valve element 40 into closed rela-tion with -the valve seat -~ormed by the di-Eferen-t inner diameters of the cylindrical valve body 30 thereby closing a fluid passageway 55 defined by -the cylindrical valve body 30 and which passageway 55 communicates with an extension -thereof in the nozzle plate 27 and the spray nozzle 28 engaged therein.
It will thus be seen that -the coolant fluid in the elongated housing 18 which has been -flow:ing through -the 3~
openings 36 in -the coil cartri.dge bodies 35 and through the interior of the cylindrical valve body 30 and the ~luid pass-ageway 55 de-fined -thereby is ins-tantly stopped by -the over-balancing O r the urging o~ -the spring 42 against the cylindrical valve element 40 by the iluid pressure o-~ the coolan-t fluid in the elonga-ted housing 18 which extends inwardly o~ the passageway 53 and -through the pilot valve chamber 46 around the smaller diameter plunger 47 -therein and through the passageway 45 and into the interior o~ the cylindrical valve body 30.
The opening o~ the ~luid passageway comprising the openings 36 in the coil. cartridge bodies 35 and the fluid passageway 55 in -the cylindrical. valve body 30 is equally rapid because, as bes-t illus-tra-ted in Figure 6 of the drawings, energiza-tion o~ the solenoid coil 49 moves the plunger 47 to the right closing -the inner end o~ the -~luid passageway 53 and simultaneously moving away irom the pilot valve seat 54 and the opening therein which communlca-tes wi-th a vent pas sageway 75 in the coil cartri.dge body 35 and which vent passageway 75 extends through -the body member 26 ;3 and the nozzle pia-te 27 -to atmosphere. Thus fluid in the interior of the cylindrical valve body 30 and -the interior oE -the cylindrical ~alve element 40 is ven-ted -to atmosphere by way of -the pilot valve chamber ~6 and the passageway ~5 and the over-ba:Lancing of -the spring ~2 ends. The pressure of -the coolan-t fluid in the elonga-ted housing 18 can thus extend through the openings 36 into the cross sectionally circular cavi-ty 34 and -through -the openings 32 where it will engage the conical closed end ~1 of the valve element 40 and move the same to -the right as seen in Figure 6 to full open position and against the urging of the spring ~2. The coolant -Eluid -thus ins-tantly f]ows through -the openirlgs 36 and 32 and in-to the passageway 55defined by -the cylindrical valve body 30 and through -the spray nozzles 28 engaged in the extension -thereof.
The circuit for energizing the solenoid coil ~9 is carried by conductors 57 and 58 positioned in -the cavity 51 and ex-tensions thereof and extend from -the coil ~9 to terminal pins 59 and 60 as seen in Figure 3 o:E -the drawings and which pins 59 and 60 project :Erom the base of the coil cartridge body 35 inwardly of -the annular flange 37 thereon. Th~ cavities 51 and the passageways in l~
co:il cartridge bodies 35 through which conducto:rs ext.erld to -the terminal pins 58 and 59 are filled with an epoxy resin used for erlcapsu~La-ting -the conduc-tors 57 and 58 and the solenoid coil ~9 and as heretofore referred to and indicated in ~igures 5 and 6 o-l -the drawings by -the reference numerals 50.
By referring to Figure 4 of the drawings, i-t will be seen that receptacles 61 and 62 are formecl in -the recessed area 38 of -the body members 26 around the aper-tures 29 for the reception of the terminal pins 59 and 60 and by again re:~erring -to ~igure 3 of -the drawings, it will be seen that each of -the coil cartridge bodies 35 and the base thereof has at least a pair of alignment pins 63 which projec-t ~rom the base o -the coil car-tridge body 35 in spaced relation to -the terminal pins 59 and 60 and are arranged to register with match:ing socke-ts 64 in the recessed area 38 of the body mernber 26 as seen in Figure ~ of the drawings. This cons-truc-tiorl prevents rotation of the coil 3~3~3 cartridge bodies 35 wi-th respect to -the body members 26 and insures sa-tisiactory electrical contact between the terminal pins 59 and 60 and the receptacles 61 and 62.
By re-~erring -to Figure 7 Or the drawings, it will be seen that the body member 26 is provided with -two vertical bores 65 which ex-tend upwardly -therein rrom the bottom thereo~ and communica-te with horizontal bores 66 in which -the electrical receptacles 61 and 62 are positioned.
Conduc-tors 67 and 68 extend :Crom the receptacles 61 and 62 into the vertical bores 65 and downwardly therethrough to points inwardly o~ the lower end o~ the body member 26 and as illustrated in Figure ~ connect with an electrical connection plug 69 which is positioned in a cylindrical body 70 having exteriorly arranged threads ~or the reception and engagemen-t o~ a matching elec-trical connection plug (not shown). The electrical connection plug 69 and its mounting are secured to -the body member 26 by :ras-teners 71.
In completed assembly, -the elec-trical connection plugs Z0 69 irl their cylindrical bodies extend ~rorn the back sur~aces ~3~3~3 of the body members26 and below -the elongated horizon-tal housing 18. A wiring harness (not shown) carrying a plurality o-E -the matching electrical connection plugs enables electrical connection to be made -Erom a control means (not shown) to each o:E the electrical connection plugs 69 on each oE the body members 26 thus providing for the simultaneous con-trol oE -the pilot operated coolant control valvesthrough which the coolant is delivered to the rolls oE the rolling mill.
The body members oE the device oE the invention are pre:Eerably s-tainless steel and as hereinbe;Eore described, .
it will be recognized -that the ac-tual coolant controlling valves are formed as readily replaceable poppet cartridges which can be readily removed and inspected and/or replaced i-~ necessary by simply removing the noæzle plate 27 which is attached -to -the body member 26 by Eastener 72.
The coi:L car-tridge bodies 35 are similarly a-ttached to -the body member 26 by -fasteners 73.
The so]enoidcoils baing sealed and held in place by encapsula-tion in the epoxy resin are pro-tec-ted Erom damage which might ~31~3 otherwise occur from the coolant in which -the coil cartridge bodies 35 are submerged. The solenoid coils 49 are designed to opera-te at 24 volts DC and draw a maximum of .30 amps. The plungers 47 and the coils 49 are so designed tha-t the same are fully opera-tional at 85% of the indicated voltage and thus evidence small power requirements which substantially improve the device, both with resPect to automa-tic and manual imput signals for operation.
Those skilled in the art of rolling mill reduction of metals will be familiar with the fact that tbe continuous direction of a su.itable coolant such as kerosene as specified herein on the work and back up rolls of the rolling mill, in effect controls-thetemperature o~ -the work rolls and thereby -the -thlckness of the metal being rolled. ~ desirable coolant temperature easily maintained with the presen-t sys-tem is between 90F.and 160F. with coolant pressure supplied -the plurali-ty of sp.ray nozzles 28 a-t varying, desired pressures be-tween 10 and 100 p.s.i. The nozzles 28 are preferably arranged for indexing a-t 15 from a -transverse center line so as to insure complete coverage ~2~3~63 of -the work and backup rolls of the rolling mill on whic the device is used.
A typical pilot operated coolant valve assembly as disclosed herein will opera-te successfully for several million cycles and consis-tently avoid leakage when in closed or non-operati.ng status.
It will thus be seen -that substantia]ly improvecl pilot operated coolan-t control va~.vesin manifold assembly have been disclosed and -that although but one embodimen-t 1~ of the present invention has been illustrated and described, it will be apparent to those skilled in the art tha-t various changes and modifica-tions may be made -therein withou-t departing from the spirit O:e the invention or from the scope of -the appended claims and having thus described my invention what I claim is: , --1~3--
IN MANIFOLD ASSEMBLY
Backgroulld Or the Invention Technical Field:
This invention relates -to rolling mills in general and more particularly to rolling mills where aluminum is being reduced to thin gauge sheets and still more particularly to coolant applying devices -for said lolling mills.
Description of the Prior Art:
Prior coolant applying devices used on rolling mills have arranged elongated maniiolds parallel with the work and backup rolls oi the rolling mill and directed ~luids, such as kerosene, through individual spray nozzles on the mani~olds against the rolls o~ the mlll to provide temperature control and lubrication during the rolling opera-tion. The known prior art patents are Nos. 3,880,358, 4,4~7,047 and 4,400,961.
Several prior art pa-tents relate to pilot operated con-trol valves including Nos. 3,145,967, 3,159,374 and 4,391,296. In each o-~ these pa-ten-ts, solenoicl operated ~,,, ~,"., 3~163 valves are disclosed which theorectically control fluid directed therethrough.
In Patent 3,145,967 an elastic sleeve is arranged in spaced relation about a core positioned in a rluid passageway to be controlled. An annular cavity in the valve around the exterior sur-face Oe the elastic sleeve enables air pressure to be introduced so as to distort -the plastic sleeve inwardly against the core and thus close the -fluid passageway. The air pressure is contro]led by a solenoid opera-ted valve.
In Pa-tent 3,159,374, a f]exible diaphragm is positioned to intercep-t a -f]uid passageway through the valve when fluid pressure is applied to one side o-f the diaphragm so as to distort the same into closing relation to the fluid passageway controlled thereby. The fluid pressure -for operating the diaphragm is controlled by a solenoid valve.
Paten-t 4,391,29~ discloses a valve in which a valve plug moves into and out of closing relation with respect to a -fluid passageway extending between an in]ct por-t and an outle-t por-t wi-th the valve plug being urged to 3~3 closed posi-tion in the fluid passageway by a spring and moved to open position by a solenoid. A piston is positioned in an extension of the fluid passageway and a secondary inlet por-t is in communication with the -1uid passageway below the pis-ton so that manual operation of the valve can be achieved by introducing hydraulic pressure into the second inlet port so as to move the piston in the fluid passageway where it will engage and open -the valve plug.
The present invention is dependent upon the positive control of the coolan-t by each of the plurality of pilot operated valves in the manifold assembly. These valves must shut off instantly, as :Eor example when a -1ash ~ire occurs and -the continued spraying of the coolan-t liquid, such as kerosene, would feed the fire and destory -the rolling mill. The prior art pilot operated control valves are unable to e-ffect instantaneous posi-tive shut-off action and are subject to faul-ty operation due to dir-t or particles of foreign materials in the coolan-t supply.
The prior art coolan-t con-trol valves generally do not ~31~3~3 fail sa-fe whi.ch is extremely important when the cool.ant, whi.ch is commonly kerosene, is -flammable. Generally~
-the prior ar-t coolant valves require complete disman-tling of the valve bodies and the operab]e parts whereas in the present inven-tion the va].ve bodies defining the valve seats and the movab.Le valve elements -take -the -form of quickly and easily removable cartridges and due to their novel construction and opera-ting pa-tterns are able -to operate successfully and close comp:Letely and quickly despite the presence of dirt and/or foreign ma-terials in the coolan-t supply.
This invention eliminates the problems tha-t here-tofore existed in connection wi-th pilo-t operated coolan-t control valves arranged in and supplied by manifold assemblies.
Summary of the Invention A pilot operated coolant control valve assembly on a coo].ant control manifold provides a plurality of fail-safe valve elements in removable car-tri.dge-like assemblies con-trolling the supply of coolan-t, such as kerosene to individual spray nozzles direc-ted at rolling mill rolls and -the l:ike. Each ~3~;3 of the multiple coolant control valves is operable to open position by solenoids incorporated therein and operable -to closed position by de-energization of the solenoids and the resultan-t hydraulic actua-tion o-f the pilot valve elements by the collant. Ins-tan-taneous shut-down o-f the coolan-t spray means is therefore achieved by simple de-energiza-tion O e the several solenoids controlling the pilo-t ~a~ves, which in turn con-trol the coolant con-trol valves which control the coolant supplied the spray nozzles o-f the manifold assembly.
Descrip-tion of the Drawings Figure 1 is a symbolic illustration of a pair o-f work lol.ls and associa-ted backup rolls of a. rolling mill with a fluid collecting trough -therebelow and several fluid spraying mani-foldassembli.es therebeside;
Figure 2 is a perspective eleva-tion of a plurality of coolant control valves on a manifold assembly;
Figure 3 is an exploded perspective eleva-tion of one O:e the coolan-t control valves, a body member, a nozz.le plate, a coolant valve body valve element for opera-tion therein and a pair of solenoid opera-ted pilot valves wi-th par-ts broken away and par-ts in cross section;
~2~3~i3 Figure ~ is a perspective view of the reverse side o-f the valve body seen in Figure 3 of the drawings;
Figure 5 is a cross sectional elevation transversely of the control valve and manifold assembly of Figure 2 with parts broken away and parts in cross section;
Figure 6 is a side eleva-tion of one of the coolant valve assemblies and opera-ting solenoids of Figure S wi-th parts broken away and parts in cross section; and Figure 7 is a side eleva-tion of one of the coolant valves of Figure 5 with parts broken away and parts in cross section and illus-trating the wiring for operating the solenoid pilot valve thereof.
Description of the Preferred Embodiment By referring to Fi.gure 1 of the drawings, it will be seen -that a diagramma-tic illustration of a rolling mill discloses superimposed work rolls 10 and 11 engagcd on a pass line 12 and having backup rolls 13 and 1~ as will be understood by those skilled in the ar-t.
Means for driving the rolls is not illustrated. A
coolant collec-tion trough 15 is shown and :Eour.vertically spaced coolant con-trol valve manifold assemblies 16 are shown positioned in spaced relation to the work rolls 10 and 11 and the backup rolls 13 and 1~. Means for circulating a coolant fluid such as kerosene from the colleeting -trough 15 to the mani-folcl assembly 16 is indicated by broken lines 17.
By referring to Figure 2 o-f the drawings, a perspec-tive elevation of one of the coolan-t control valve manifold assemblies 16 may be seen and it is formed of an elollgated housing 18 closed at i-ts ends 19 and 20 and provided with end ex-tensions 21 and 22 including moun-ting and ad~jus-tment plates 23 and 2~ by which the housing 18 is suppor-ted adjacent a roll of a rolling mill as hereinbefore described in connection.with Figure 1 of the drawings.
Inlet ports 25, see Figure 5, comprise means for deliver-ing a coolant, such as kerosene -thereinto and a plurality of body members 26 are sealingly at-tached to an open side of the housing 18 ancl carry nozzle pla-tes 27, each of which carries one or more spray nozzles 28 -through which coolan-t is selectively directed to the rolls of -the rolling mill in ~3~63 desirable volume and spray pattern.
A horizontal section -through one of the elongated housings 18 and one of -the pilot operated coolan-t control valve assemblies secured thereto is seen in Figure 5 o-~ the drawings.
By referring now -to Figures 3,4 and 5 of the drawings, it will be seen that each o-f the plurality of pilot operated coolant control valves is moun-ted in apertures 29 in each of -the body members 26 and -tha-t each of the coolant c-on-trol valves comprises a cylindrical valve body 30 having several openings 32 circumferentially spaced therein. Several annular seals, such as 0-rings 33 are carried in annular grooves in the cylindrical valve body 30 which sealingly engage the apertures 29 in the bocly member 26 and a cross sectionally circular cavity 34 in each of a plurali-ty of coil car-tridge bodies 35.
By referring to Figure 5 in particular, it will be seen -that each of -the coil car-tridge bodies 35 has several openings 36 therein which communicate with the cross sectionally circular cavi-ty 34 therein and each of the bodies 3~63 35 is provided with an annular ilange 37 on one end which registers in an annular cavity 38 in the body member 26.
Annular seals such as 0-rings 39 are positioned be-tween -the annular flanges 37 of the coil cartridge bodies 35 and the open side of the elongated housing 18.
Re~erring again -to Figures 3,4 and 5 of the drawings, it will be seen tha-t a cylindrical valve element 40 having a closed conical end 41 is movably positioned in the cylindrical valve body 30 so as to be movable therein relative to the openings 32 in the area of reduced diameter 31 of -the cylindrical valve body 30. It will also be seen that the inner diameter Or the cylindrical valve body 30 is increased in the area -thereof in which the cylindrical valve element 40 is slidably moun-ted and that a portion of the closed conical end 41 of the valve element 40 is posi-tioned in the enlarged inner area when the valve element 40 is in closed rela-tion to the hollow interior of the cylindrical val-ve body 30 as best shown in Figure 5 of the drawings. A spri.ng 42 is positioned within -the cy~indrical valve body 40 and engaged against the inner _~ _ ~3~3 surface o-f -the closed end 41 thereof and agairlst a cen-trally aper-tured disc 43 which is secured in one end of -the cylindrical valve body 30.
By again rererring -to Figure 5 of the drawings, it will be observed that a passageway 45 establishes communication between -the inner end Oe the cross sectionally circular cavity 34 in the cartridge carrying body 35 and a pilo-t valve chamber 46 therein. A solenoid plunger 47 is movably disposed in a sleeve 48 which de-fines part of the pilot valve chamber 46 and which sleeve 48 is positioned within a solenoid coil 49 which is encapsulated by a suitable resin 50 which holds -the solenoid coil 49 in an enlarged cavity 51 in the coil cartridge body 35. The sleeve 48 has a collar 52 posi-tioned on -the end thereof opposite the pilo-t valve chamber 46 therein and a passageway 53 in the sleeve ~8 communicates with the opening defined by the collar 52 which thereby es-tablishes communication with the in-terior of the elonga-ted housing 18 forming the manifold of -the device.
S-till referring to Figure 5 O:e the drawi.ngs, it will be seen tha-t -the plunger 47 has secondary valve elements comprising resilient seals in each of its opposi-te ends, one of which will engage and close -the passageway 53 when the plunger 47 moves -to the right responsive to energization o~ the coil 49. The seal in the opposite end of the plunger 47 engages and closes an opening in a pilot valve seat 54 when the coil 49 is de-energized and a spr:ing and fluld pressure of the coolant in the e]ongated housing 18 moves the plunger 47 to the left as illus-tra-ted in Figure 5 oE the drawings. When -this occurs, the fluid pressure extends through the pilo-t valve chamber 46, the passageway 45, and communicates wi-th the in-terior of the cylindrical valve body 30 and the in-terior o-f the cylindrical valve element 40 therein and with the added urging oi the spring 42 moves the conical end closure 4~ oi the valve element 40 into closed rela-tion with -the valve seat -~ormed by the di-Eferen-t inner diameters of the cylindrical valve body 30 thereby closing a fluid passageway 55 defined by -the cylindrical valve body 30 and which passageway 55 communicates with an extension -thereof in the nozzle plate 27 and the spray nozzle 28 engaged therein.
It will thus be seen that -the coolant fluid in the elongated housing 18 which has been -flow:ing through -the 3~
openings 36 in -the coil cartri.dge bodies 35 and through the interior of the cylindrical valve body 30 and the ~luid pass-ageway 55 de-fined -thereby is ins-tantly stopped by -the over-balancing O r the urging o~ -the spring 42 against the cylindrical valve element 40 by the iluid pressure o-~ the coolan-t fluid in the elonga-ted housing 18 which extends inwardly o~ the passageway 53 and -through the pilot valve chamber 46 around the smaller diameter plunger 47 -therein and through the passageway 45 and into the interior o~ the cylindrical valve body 30.
The opening o~ the ~luid passageway comprising the openings 36 in the coil. cartridge bodies 35 and the fluid passageway 55 in -the cylindrical. valve body 30 is equally rapid because, as bes-t illus-tra-ted in Figure 6 of the drawings, energiza-tion o~ the solenoid coil 49 moves the plunger 47 to the right closing -the inner end o~ the -~luid passageway 53 and simultaneously moving away irom the pilot valve seat 54 and the opening therein which communlca-tes wi-th a vent pas sageway 75 in the coil cartri.dge body 35 and which vent passageway 75 extends through -the body member 26 ;3 and the nozzle pia-te 27 -to atmosphere. Thus fluid in the interior of the cylindrical valve body 30 and -the interior oE -the cylindrical ~alve element 40 is ven-ted -to atmosphere by way of -the pilot valve chamber ~6 and the passageway ~5 and the over-ba:Lancing of -the spring ~2 ends. The pressure of -the coolan-t fluid in the elonga-ted housing 18 can thus extend through the openings 36 into the cross sectionally circular cavi-ty 34 and -through -the openings 32 where it will engage the conical closed end ~1 of the valve element 40 and move the same to -the right as seen in Figure 6 to full open position and against the urging of the spring ~2. The coolant -Eluid -thus ins-tantly f]ows through -the openirlgs 36 and 32 and in-to the passageway 55defined by -the cylindrical valve body 30 and through -the spray nozzles 28 engaged in the extension -thereof.
The circuit for energizing the solenoid coil ~9 is carried by conductors 57 and 58 positioned in -the cavity 51 and ex-tensions thereof and extend from -the coil ~9 to terminal pins 59 and 60 as seen in Figure 3 o:E -the drawings and which pins 59 and 60 project :Erom the base of the coil cartridge body 35 inwardly of -the annular flange 37 thereon. Th~ cavities 51 and the passageways in l~
co:il cartridge bodies 35 through which conducto:rs ext.erld to -the terminal pins 58 and 59 are filled with an epoxy resin used for erlcapsu~La-ting -the conduc-tors 57 and 58 and the solenoid coil ~9 and as heretofore referred to and indicated in ~igures 5 and 6 o-l -the drawings by -the reference numerals 50.
By referring to Figure 4 of the drawings, i-t will be seen that receptacles 61 and 62 are formecl in -the recessed area 38 of -the body members 26 around the aper-tures 29 for the reception of the terminal pins 59 and 60 and by again re:~erring -to ~igure 3 of -the drawings, it will be seen that each of -the coil cartridge bodies 35 and the base thereof has at least a pair of alignment pins 63 which projec-t ~rom the base o -the coil car-tridge body 35 in spaced relation to -the terminal pins 59 and 60 and are arranged to register with match:ing socke-ts 64 in the recessed area 38 of the body mernber 26 as seen in Figure ~ of the drawings. This cons-truc-tiorl prevents rotation of the coil 3~3~3 cartridge bodies 35 wi-th respect to -the body members 26 and insures sa-tisiactory electrical contact between the terminal pins 59 and 60 and the receptacles 61 and 62.
By re-~erring -to Figure 7 Or the drawings, it will be seen that the body member 26 is provided with -two vertical bores 65 which ex-tend upwardly -therein rrom the bottom thereo~ and communica-te with horizontal bores 66 in which -the electrical receptacles 61 and 62 are positioned.
Conduc-tors 67 and 68 extend :Crom the receptacles 61 and 62 into the vertical bores 65 and downwardly therethrough to points inwardly o~ the lower end o~ the body member 26 and as illustrated in Figure ~ connect with an electrical connection plug 69 which is positioned in a cylindrical body 70 having exteriorly arranged threads ~or the reception and engagemen-t o~ a matching elec-trical connection plug (not shown). The electrical connection plug 69 and its mounting are secured to -the body member 26 by :ras-teners 71.
In completed assembly, -the elec-trical connection plugs Z0 69 irl their cylindrical bodies extend ~rorn the back sur~aces ~3~3~3 of the body members26 and below -the elongated horizon-tal housing 18. A wiring harness (not shown) carrying a plurality o-E -the matching electrical connection plugs enables electrical connection to be made -Erom a control means (not shown) to each o:E the electrical connection plugs 69 on each oE the body members 26 thus providing for the simultaneous con-trol oE -the pilot operated coolant control valvesthrough which the coolant is delivered to the rolls oE the rolling mill.
The body members oE the device oE the invention are pre:Eerably s-tainless steel and as hereinbe;Eore described, .
it will be recognized -that the ac-tual coolant controlling valves are formed as readily replaceable poppet cartridges which can be readily removed and inspected and/or replaced i-~ necessary by simply removing the noæzle plate 27 which is attached -to -the body member 26 by Eastener 72.
The coi:L car-tridge bodies 35 are similarly a-ttached to -the body member 26 by -fasteners 73.
The so]enoidcoils baing sealed and held in place by encapsula-tion in the epoxy resin are pro-tec-ted Erom damage which might ~31~3 otherwise occur from the coolant in which -the coil cartridge bodies 35 are submerged. The solenoid coils 49 are designed to opera-te at 24 volts DC and draw a maximum of .30 amps. The plungers 47 and the coils 49 are so designed tha-t the same are fully opera-tional at 85% of the indicated voltage and thus evidence small power requirements which substantially improve the device, both with resPect to automa-tic and manual imput signals for operation.
Those skilled in the art of rolling mill reduction of metals will be familiar with the fact that tbe continuous direction of a su.itable coolant such as kerosene as specified herein on the work and back up rolls of the rolling mill, in effect controls-thetemperature o~ -the work rolls and thereby -the -thlckness of the metal being rolled. ~ desirable coolant temperature easily maintained with the presen-t sys-tem is between 90F.and 160F. with coolant pressure supplied -the plurali-ty of sp.ray nozzles 28 a-t varying, desired pressures be-tween 10 and 100 p.s.i. The nozzles 28 are preferably arranged for indexing a-t 15 from a -transverse center line so as to insure complete coverage ~2~3~63 of -the work and backup rolls of the rolling mill on whic the device is used.
A typical pilot operated coolant valve assembly as disclosed herein will opera-te successfully for several million cycles and consis-tently avoid leakage when in closed or non-operati.ng status.
It will thus be seen -that substantia]ly improvecl pilot operated coolan-t control va~.vesin manifold assembly have been disclosed and -that although but one embodimen-t 1~ of the present invention has been illustrated and described, it will be apparent to those skilled in the art tha-t various changes and modifica-tions may be made -therein withou-t departing from the spirit O:e the invention or from the scope of -the appended claims and having thus described my invention what I claim is: , --1~3--
Claims (6)
1. In pilot operated coolant control valves in a manifold assembly for supplying a coolant and apertured body members closing said manifold, the improvement comprising forming said coolant control valves as removably cartridges positioned in registry with said apertures in said body members, each of said cartridges consisting of a cylindrical valve body apertured inwardly of its ends, a valve seat in said valve body, a valve element movably disposed in said valve body, means urging said valve element toward said valve seat, a coil cartridge body engaging said cylindrical valve body and defining a cavity for receiving coolant from said manifold, a portion of said valve body and said valve element disposed in said cavity, openings in said coil cartridge body communicating with said cavity and said manifold, a solenoid plunger in a chamber axially of said coil cartridge body, secondary valve elements on the ends of said solenoid plunger for registry with oppositely disposed passageways communicating with said chamber and said manifold and the atmosphere respectively, a solenoid coil in said coil cartridge body for moving said solenoid plunger when energized and one of said secondary valve elements against said passageway communicating with said manifold to maintain said valve element in open position and whereby coolant in said cavity moves said solenoid plunger, when said solenoid coil is de-energized, against the passageway communicating with the atmosphere to maintain said valve element in closed position and electrical conductors in connection with said solenoid coil for energizing the same.
2. The improvement in pilot operated coolant control valves set forth in claim 1 and wherein spray means are in communication with said apertures in said body members.
3. The improvement in pilot operated coolant control valves set forth in claim 1 and wherein said passageway in said coil cartridge bodies communicating with the atmosphere continues through said body members.
4. The improvement in pilot operated coolant control valves set forth in claim 1 and wherein said means urging said valve element toward said valve seat consists of a spring in said cylindrical valve body.
5. The improvement in pilot operated coolant control valves set forth in claim 1 and wherein electrical conductors to hold the same in connection with said solenoid coils extend through passageways in said coil cartridge bodies, terminal pins extending outwardly of one end of said coil cartridge bodies, electrical receptacles in said body members positioned for engagement with said terminal pins, said electrical conduc-tors engaging said terminal pins and epoxy resin encapsulating said solenoid coils and conductors in said coil cartridge bodies.
6. The improvement in pilot operated coolant control valves set forth in claim 1 and wherein electrical conductors in connection with said solenoid coils extend through passage-ways in said coil cartridge bodies, terminal pins extending outwardly of one end of said coil cartridge bodies, electrical receptacles in said body members positioned for engagement with said terminal pins, said electrical conductors engaging said terminal pins, passageways in said body members, second electrical conductors in said passageways engaging said electrical receptacles, said body members extending outwardly of said manifolds and electrical connection plugs on said body members, said second electrical conductors in said passageways in said body members establishing electrical connection with said electrical connection plugs and means for electrically interconnecting each of said electrical connection plugs whereby said solenoids in said coil cartridge bodies may be simultaneously energized and de-energized by controlling an electrical circuit through said interconnecting electrical connection means.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CA000495049A CA1243863A (en) | 1985-11-12 | 1985-11-12 | Pilot operated coolant control valves in manifold assembly |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CA000495049A CA1243863A (en) | 1985-11-12 | 1985-11-12 | Pilot operated coolant control valves in manifold assembly |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CA1243863A true CA1243863A (en) | 1988-11-01 |
Family
ID=4131859
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CA000495049A Expired CA1243863A (en) | 1985-11-12 | 1985-11-12 | Pilot operated coolant control valves in manifold assembly |
Country Status (1)
| Country | Link |
|---|---|
| CA (1) | CA1243863A (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN117249651A (en) * | 2023-11-20 | 2023-12-19 | 内蒙古工业大学 | Slow-heating and rapid-cooling device for preparing full-solid waste cementing material and operation method |
-
1985
- 1985-11-12 CA CA000495049A patent/CA1243863A/en not_active Expired
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN117249651A (en) * | 2023-11-20 | 2023-12-19 | 内蒙古工业大学 | Slow-heating and rapid-cooling device for preparing full-solid waste cementing material and operation method |
| CN117249651B (en) * | 2023-11-20 | 2024-01-26 | 内蒙古工业大学 | Slow-heating and rapid-cooling device for preparing full-solid waste cementing material and operation method |
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