CA1210381A - Dual flow rate valve - Google Patents
Dual flow rate valveInfo
- Publication number
- CA1210381A CA1210381A CA000427346A CA427346A CA1210381A CA 1210381 A CA1210381 A CA 1210381A CA 000427346 A CA000427346 A CA 000427346A CA 427346 A CA427346 A CA 427346A CA 1210381 A CA1210381 A CA 1210381A
- Authority
- CA
- Canada
- Prior art keywords
- valve
- pilot valve
- pilot
- flow
- component
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Expired
Links
Classifications
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16K—VALVES; TAPS; COCKS; ACTUATING-FLOATS; DEVICES FOR VENTING OR AERATING
- F16K31/00—Actuating devices; Operating means; Releasing devices
- F16K31/12—Actuating devices; Operating means; Releasing devices actuated by fluid
- F16K31/36—Actuating devices; Operating means; Releasing devices actuated by fluid in which fluid from the circuit is constantly supplied to the fluid motor
- F16K31/40—Actuating devices; Operating means; Releasing devices actuated by fluid in which fluid from the circuit is constantly supplied to the fluid motor with electrically-actuated member in the discharge of the motor
- F16K31/402—Actuating devices; Operating means; Releasing devices actuated by fluid in which fluid from the circuit is constantly supplied to the fluid motor with electrically-actuated member in the discharge of the motor acting on a diaphragm
Landscapes
- Engineering & Computer Science (AREA)
- General Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Magnetically Actuated Valves (AREA)
Abstract
DUAL FLOW RATE VALVE
Abstract of the Disclosure A valve including a valve body (15') having an inlet port (27), an outlet port (28), and an orifice (30) between the ports surrounded by a valve seat (31). A valve member (35) is movable into and out of engagement with the valve seat to close and open the valve, respectively. The valve member can be oscillated to permit a reduced rate of flow through the valve. The valve member may be carried by the armature (34) of an electrical solenoid (40); when the solenoid is energized by full wave AC power, the valve is held open in a stable condition, and when the solenoid is energized by half wave AC power, the valve member oscillates. The valve may be used as the pilot valve of a main valve (10), wherein when the valve member is oscillated to permit reduced rate flow through the pilot valve, the main valve remains closed.
Abstract of the Disclosure A valve including a valve body (15') having an inlet port (27), an outlet port (28), and an orifice (30) between the ports surrounded by a valve seat (31). A valve member (35) is movable into and out of engagement with the valve seat to close and open the valve, respectively. The valve member can be oscillated to permit a reduced rate of flow through the valve. The valve member may be carried by the armature (34) of an electrical solenoid (40); when the solenoid is energized by full wave AC power, the valve is held open in a stable condition, and when the solenoid is energized by half wave AC power, the valve member oscillates. The valve may be used as the pilot valve of a main valve (10), wherein when the valve member is oscillated to permit reduced rate flow through the pilot valve, the main valve remains closed.
Description
DUAL FLOW RATE VALVE
This invention relates to valves for controlling the flow of liquids, and more par~icularly to such a valve capable of providiny two diffexent rates of flow, as well as shutting off flow com-pletely.
In certain installations, such as automatic liquid dispensing equipment, large but precise metered amounts of liquid must be delivered within a relatively short time. An example of such equip-ment is that used at self-service gasoline pumps. A customer will pre-pay for a particular amount of fuel, and then operate the pump which has been set to deliver the exact quantity paid for. Typ-ically, two separate valves are used in this operation: a large orifice valve for rapidly delivering most of the gaso]ine, and a smaller orifice, or "topping off", valve for accurately completing delivery of the remaining portion. The large flow rate valve is closed during the final fillin~ operation through the slower flow rate valve. If only a large orifice valve were used, it would be very dificult to deliver the exact quantity of liquid desired, and if only a small orifice valve were used, delivery would take too long.
While these two~valve arrangements operate satisfactorily, they are relatively expensive. Usually, the valves are solenoid op-erated. Thus, in addition to requiring two valves, two separate electrical solenoid operators must be furnished, as well as l associat~d wiring for two solenoids and piping for two valves.
It is an object of the presen~ invention -to provide a slngle two-way valve which can automatically provide two different flow ra~es, and thus take the place of the conventional high and low flow rate pair of valves.
It is another object of the invention to provide a dual 10w rate valve having two flow c~nditions, one in which the valve is in a stable open position, and the o~her in which the valve member is oscillated to permit only restricted flow through the valve~
It is a further object o~ the invention to provide such a valve operated by a single solenoid, the solenoid being ene.rgized by half-wave rectified ~C power ~o cause oscillation of the valve me~ber, and having full wave AC power applied to it to produce the stable open position of the valve.
It i5 an additional object of the invention to provide a dual flow rate, two-way, pilot-operated valve. When the pilot valve is fully opened, th~ main valve opens to provide a large flow rate.
When the valve member of the pilot valve is oscillated , the main valve remains closed and ~low takes place, at a low rate, only ~hrough the pilot valve.
Additional objects and featuxes of the invention will be ap-parent from the following description, in which reference is made to ~ the accompanying drawings.
In the drawings:
Fig~ a cross-sectional view of a pilot-operated valve, according to the invention, in completely closed condition;
~ ig. 2 is a cross-sectlonal view of the valve in fully opened condition;
Fig~ 3-is a cros~-sectional view of the valve showing the main valve closed and the pilot valve in its vibratory open condition;
Fig~ 4 is a schematic di.ayram showing one electri.cal circuit for energizing the solenoid of the pilot valve; and 3~
-3~
Fig. 5 is a schematic diagram showing an alternative circuit for energizing the solenoid of the pllo~ valve.
The valve chosen to illustra~e the p~esent invention includes a valve body 10 having a main inlet port 11, a main out-let port 12, and an orifice 13 between the ports surrounded by a circular valve seat 14. Mountecl upon body 10 is a bonnet 15, the body and bonne-t being secured together by bolts (not shown).
Sandwiched between body ].0 and bonnet lS is the margin of a flexible diaphragm 18, seals 19 also being present to insure a liquid-tight seal between the parts. Sesured to the lower ace of aiaphragm 18 is a main valve member 20 movable into engagement with valve seat 14 (Fig. 1), tv close the main valve, and out of engagement with the valve seat (Fig. 2), to open the main valve, A compression spring 21, arranged between bonnet 15 and a support plate 22 carried by the upper surface of diaphragm 18, continuously urges the diaphragm and main valve member 20 toward valve seat 14.
Bonnet 15 and diaphragm 18 define a chamber 23 between them.
Chamber 23 is i~ constant communication with main inlet port 11 2Q through a bleed hole 24 defined by a grommet passing through a hole in diaph.ragm 18.
The right side of bonnet 15 (as seen in Figs. 1-3) constitutes the body 15' of a pilot valve. Pilot valve body 15' includes a pilot inlet port 27, communicating with chamber 23, a pilot outlet port 28, communicating with main outlet port 12 through a hole 29 i~ a diaphragm 18, and a.pilot orifice 30, b2tween the two pilot port~, surrounded by a circular pilot valve seat 31. Threaded into pilot valve body 15' is a bonnet 32 carrying a tube 33 within which an armature 34 is lonyitudinally slidable. At its lower end, armature 34 carries a resilien~ pi.lot valve member 35 rnovable into engagement with pilot valve seat 31 (E~iy. 1), to close the pilot valve, and out of engagement with ~he valve seat 31 (Fig. 2), to open the pilot valve. A compression spring 36 continuously urges armature 34 and hence valve member 35 toward v~lve seat 31. Valve body 15' ancl bonnet 32 de~ine a pilot valve chamber 37 between them, which constantly communicates with chamber 23 through pilot valve inlet port 27.
A solenoid coil (not shown in Figs. 1-3, but indicated by the reference numeral 40 in ~igs. 4 and 5) surrounds tube 33 and is enclosed within a housing 41~ When coil 40 is ene~gized, armatu.re 34 xises .i~ tube 33, against the force of spring 36, and engages a stationary armature 42 located within the upper nd of the tube (Fig. 2). In this condition, the pilot valve is fully open. IJpon deenergi,~ation of the solenoid coi.l, spring 36 returns armature 34 to the position in which valve member 35 engages valve seat 31 ~Fig. 1) so a~ to close the pilok valve~
According to the present invent.ion, solenoid coil 40 can be energized by what amount tG two distinct power sources, an ex~m~le .
of whic~ is shown in Fig. 4. ~rminal.s 45 and 46 are connectable to a sour~e of electric power, 5uch as 120 volt~ 60 cycle, alter-nating current. A movable switch member 47 may be brought alter-natively into engagement with either of two terminals 48 or 49.
Terminal 48 i5 connected in series with solenoid coil 40 and terminal 46. Thus, when switch member 47 i8 in its solid line position engaging terminal 48, ~ull wave current is applied to coil 40, and armature 34 moves lnto a skable condition engaging ~Z:~3~
--s stationary armature 42. Terminal ~9 is connected in series with a diode 50, coil 40, and terminal 46~ Thus, when switch member 47 is shifted to its broken line positi.on engaginy terminal 49, hal~
wave rec~i~ied current is appliec~ -~o coil 40. This causes armature 34 to oscillate toward and away from valve seat 31, the range o~
vibratory mov~ment heing indicated by the distance 51 in Fig. 3.
Operation of the valve will now be explained. Assume that solenoid coil 40 is deenergized, i.e., terminals 45 and 46 are disconnected from a source of power, and the valve is in the condi.~ion shown in Fig. 1. Fluid at inlet pressure, from inlet port 11, fills chamber 23 through bleed hole 24, this fluid also filling chamber 37 through port 27. The ~orce on the upper face of dia-phragm 18 produced by th.is fluid pressure, together with the force of spring 21, hold main valve member 20 against seat ].4 to close the main valve~ Spring 36 hold~ pilot valve member 35 agalnst seat 31 to alose the pilot valve.
If terminals 45 and 46 are now connected to a source o AC
power, by means of a switch (not shown), and switch member 47 contacts terminal 4a, full wave power is applied to solenoid coi.l 40. As a xesult, armature 34 rises to the position shown in Fig. 2, opening the pilot valve. Pressurized fluid within pilot chamber 37 flows through pilot outlet port 2g to ma~n outlet port 12. Pressurized fluid in chamber 23 flows through pilot inlet port 27 into chamber 37, and then th~ough port 28 to main outlet port 12. As a result, the pressure above diaphragm 18 is relieved, and inlet pressure acting on the lower ace o the diaphragm and valve member 20 in the area surrounding valve s~at 14 cause the diaphragm and valve member to ri~e to the position shown in Fig. 2~ thereby opening the main valve.
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~, Although high pressure fluicl continues to enter chamber 23 through bleed hole 24, pressure does not huild up in the chamber ~ince the cross-sectional flQw areas of pilot por~s 27 and 28, and pilot orifice 30 are larger than the cro~s-sectional flow area of bleed hole 24. Thus, as long as the pilot valve remains in its stahle open condit.ion ~Fig. 2), ~he mai.n valve remains open, and liquid ~lows ~ugh the valve at a rapid rate.
When the volu~e of liquid dispensed nears the quantity desired, switch memb~r 47 i5 automa~ically shifted from ten~nal 48 to ten~nal 49.
As a result, solenoid coil ~0 i.s no longer energized with full wave AC power, but instead with hal wave rectified AC power, since diode 50 prevents every alternate hal wave of current from reaching coil 40. Half wave power is not sufficient to hold armature 34 in the stable condition shown in Fig. 2. Instead, the half wave current causes the armature to oscillate toward and away rom valve seat 31, as illustrated in Fig~ 3~ Oqcillation of pilot valve me~er 35, carried by armature 34, in the region adjacent to valve seat 31 permits some liquid flow rom chamber 37 through orifice 30 to outlet port 12. However, the rate of this flow is smaller than when the pilot valve is fully open ~Fig. 2~. In fact, the flow rate through orifice 30 when valve member 35 oscillates is smaller than or about equal to the flow rate o inlet liquid through bleed hole 24 into chamber 23. Consequently, fluid pressure builds up in chamber 23 which, t~gether with the force of spriny 21 moves, valve member 20 into engagement with valve ~eat 14 to close the main valve, and discontinue high rate flow through the valve. Liquid fl~w continues .
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through the valve, at a low rate, from main inlet port 11, through b].eed hole 24, chamber 23, pilo~ inlet port 27, pilot chamher 37, and pilot outlet port ~8 to main outlet port 12. This low rate flow continues until the prescribed quantity of liquid has been dis-pensed, at which point power to terminals 45 and 46 is automatically switched off. Solenoid coil 40 i5 then completely deenergized, and the pilot valve closes (Fig. l).
An alternative circuit for energlzing solenoid coil 40 is shown in Fig. 5. Terminals 45' and 46', like terminals 45 and 46 of Fig. 4, are connectable to a source of conventional AC power.
Terminal 45' is connected in series with a diode 53, coil 40, and terminal 46'. Connected in parallel with coll 40 are series-connected diode 54 and switch 55. When power is applied to terminals 45' and 46', and switch 55 is closed, half wave power is applied to coil 40; however, current flow through coil 40 is through diode 54, and the valve is fully open ~Fig. 2) delivering high rate flow.
Opening of switch 55 causes half wave power to be applied to coil 40, whereby armature 34 oscillates (Fig. 3~, and low rate flow passes through the valve.
Although in the example described above the pilot valve of a pilot-operated valve is oscillated to provide reduced rate flow, tne invention could be applied to a single orifice valve wherein the solenoid armature directly operates the main valve member of the valve. In such a case, when full wave current i5 applied to the solenoid coil, the armature holds the valve open in stable condition for full rate flow~ When half wave current is applied to the coil, the armature and hence the valve member oscillate to permit only a more restricted flow -through the valve.
The invention has been shown and described .in preferred form only, and by way of example, and many variations may be made in the invention which will still be comprised within its spirit.
It is undarstood, therefore, that the invention is not limited ~o any specific form or embodiment except insofar as such limitat.ions are included in the appended claims.
... ~.. ~ .. v . _ . .... ..
This invention relates to valves for controlling the flow of liquids, and more par~icularly to such a valve capable of providiny two diffexent rates of flow, as well as shutting off flow com-pletely.
In certain installations, such as automatic liquid dispensing equipment, large but precise metered amounts of liquid must be delivered within a relatively short time. An example of such equip-ment is that used at self-service gasoline pumps. A customer will pre-pay for a particular amount of fuel, and then operate the pump which has been set to deliver the exact quantity paid for. Typ-ically, two separate valves are used in this operation: a large orifice valve for rapidly delivering most of the gaso]ine, and a smaller orifice, or "topping off", valve for accurately completing delivery of the remaining portion. The large flow rate valve is closed during the final fillin~ operation through the slower flow rate valve. If only a large orifice valve were used, it would be very dificult to deliver the exact quantity of liquid desired, and if only a small orifice valve were used, delivery would take too long.
While these two~valve arrangements operate satisfactorily, they are relatively expensive. Usually, the valves are solenoid op-erated. Thus, in addition to requiring two valves, two separate electrical solenoid operators must be furnished, as well as l associat~d wiring for two solenoids and piping for two valves.
It is an object of the presen~ invention -to provide a slngle two-way valve which can automatically provide two different flow ra~es, and thus take the place of the conventional high and low flow rate pair of valves.
It is another object of the invention to provide a dual 10w rate valve having two flow c~nditions, one in which the valve is in a stable open position, and the o~her in which the valve member is oscillated to permit only restricted flow through the valve~
It is a further object o~ the invention to provide such a valve operated by a single solenoid, the solenoid being ene.rgized by half-wave rectified ~C power ~o cause oscillation of the valve me~ber, and having full wave AC power applied to it to produce the stable open position of the valve.
It i5 an additional object of the invention to provide a dual flow rate, two-way, pilot-operated valve. When the pilot valve is fully opened, th~ main valve opens to provide a large flow rate.
When the valve member of the pilot valve is oscillated , the main valve remains closed and ~low takes place, at a low rate, only ~hrough the pilot valve.
Additional objects and featuxes of the invention will be ap-parent from the following description, in which reference is made to ~ the accompanying drawings.
In the drawings:
Fig~ a cross-sectional view of a pilot-operated valve, according to the invention, in completely closed condition;
~ ig. 2 is a cross-sectlonal view of the valve in fully opened condition;
Fig~ 3-is a cros~-sectional view of the valve showing the main valve closed and the pilot valve in its vibratory open condition;
Fig~ 4 is a schematic di.ayram showing one electri.cal circuit for energizing the solenoid of the pilot valve; and 3~
-3~
Fig. 5 is a schematic diagram showing an alternative circuit for energizing the solenoid of the pllo~ valve.
The valve chosen to illustra~e the p~esent invention includes a valve body 10 having a main inlet port 11, a main out-let port 12, and an orifice 13 between the ports surrounded by a circular valve seat 14. Mountecl upon body 10 is a bonnet 15, the body and bonne-t being secured together by bolts (not shown).
Sandwiched between body ].0 and bonnet lS is the margin of a flexible diaphragm 18, seals 19 also being present to insure a liquid-tight seal between the parts. Sesured to the lower ace of aiaphragm 18 is a main valve member 20 movable into engagement with valve seat 14 (Fig. 1), tv close the main valve, and out of engagement with the valve seat (Fig. 2), to open the main valve, A compression spring 21, arranged between bonnet 15 and a support plate 22 carried by the upper surface of diaphragm 18, continuously urges the diaphragm and main valve member 20 toward valve seat 14.
Bonnet 15 and diaphragm 18 define a chamber 23 between them.
Chamber 23 is i~ constant communication with main inlet port 11 2Q through a bleed hole 24 defined by a grommet passing through a hole in diaph.ragm 18.
The right side of bonnet 15 (as seen in Figs. 1-3) constitutes the body 15' of a pilot valve. Pilot valve body 15' includes a pilot inlet port 27, communicating with chamber 23, a pilot outlet port 28, communicating with main outlet port 12 through a hole 29 i~ a diaphragm 18, and a.pilot orifice 30, b2tween the two pilot port~, surrounded by a circular pilot valve seat 31. Threaded into pilot valve body 15' is a bonnet 32 carrying a tube 33 within which an armature 34 is lonyitudinally slidable. At its lower end, armature 34 carries a resilien~ pi.lot valve member 35 rnovable into engagement with pilot valve seat 31 (E~iy. 1), to close the pilot valve, and out of engagement with ~he valve seat 31 (Fig. 2), to open the pilot valve. A compression spring 36 continuously urges armature 34 and hence valve member 35 toward v~lve seat 31. Valve body 15' ancl bonnet 32 de~ine a pilot valve chamber 37 between them, which constantly communicates with chamber 23 through pilot valve inlet port 27.
A solenoid coil (not shown in Figs. 1-3, but indicated by the reference numeral 40 in ~igs. 4 and 5) surrounds tube 33 and is enclosed within a housing 41~ When coil 40 is ene~gized, armatu.re 34 xises .i~ tube 33, against the force of spring 36, and engages a stationary armature 42 located within the upper nd of the tube (Fig. 2). In this condition, the pilot valve is fully open. IJpon deenergi,~ation of the solenoid coi.l, spring 36 returns armature 34 to the position in which valve member 35 engages valve seat 31 ~Fig. 1) so a~ to close the pilok valve~
According to the present invent.ion, solenoid coil 40 can be energized by what amount tG two distinct power sources, an ex~m~le .
of whic~ is shown in Fig. 4. ~rminal.s 45 and 46 are connectable to a sour~e of electric power, 5uch as 120 volt~ 60 cycle, alter-nating current. A movable switch member 47 may be brought alter-natively into engagement with either of two terminals 48 or 49.
Terminal 48 i5 connected in series with solenoid coil 40 and terminal 46. Thus, when switch member 47 i8 in its solid line position engaging terminal 48, ~ull wave current is applied to coil 40, and armature 34 moves lnto a skable condition engaging ~Z:~3~
--s stationary armature 42. Terminal ~9 is connected in series with a diode 50, coil 40, and terminal 46~ Thus, when switch member 47 is shifted to its broken line positi.on engaginy terminal 49, hal~
wave rec~i~ied current is appliec~ -~o coil 40. This causes armature 34 to oscillate toward and away from valve seat 31, the range o~
vibratory mov~ment heing indicated by the distance 51 in Fig. 3.
Operation of the valve will now be explained. Assume that solenoid coil 40 is deenergized, i.e., terminals 45 and 46 are disconnected from a source of power, and the valve is in the condi.~ion shown in Fig. 1. Fluid at inlet pressure, from inlet port 11, fills chamber 23 through bleed hole 24, this fluid also filling chamber 37 through port 27. The ~orce on the upper face of dia-phragm 18 produced by th.is fluid pressure, together with the force of spring 21, hold main valve member 20 against seat ].4 to close the main valve~ Spring 36 hold~ pilot valve member 35 agalnst seat 31 to alose the pilot valve.
If terminals 45 and 46 are now connected to a source o AC
power, by means of a switch (not shown), and switch member 47 contacts terminal 4a, full wave power is applied to solenoid coi.l 40. As a xesult, armature 34 rises to the position shown in Fig. 2, opening the pilot valve. Pressurized fluid within pilot chamber 37 flows through pilot outlet port 2g to ma~n outlet port 12. Pressurized fluid in chamber 23 flows through pilot inlet port 27 into chamber 37, and then th~ough port 28 to main outlet port 12. As a result, the pressure above diaphragm 18 is relieved, and inlet pressure acting on the lower ace o the diaphragm and valve member 20 in the area surrounding valve s~at 14 cause the diaphragm and valve member to ri~e to the position shown in Fig. 2~ thereby opening the main valve.
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~, Although high pressure fluicl continues to enter chamber 23 through bleed hole 24, pressure does not huild up in the chamber ~ince the cross-sectional flQw areas of pilot por~s 27 and 28, and pilot orifice 30 are larger than the cro~s-sectional flow area of bleed hole 24. Thus, as long as the pilot valve remains in its stahle open condit.ion ~Fig. 2), ~he mai.n valve remains open, and liquid ~lows ~ugh the valve at a rapid rate.
When the volu~e of liquid dispensed nears the quantity desired, switch memb~r 47 i5 automa~ically shifted from ten~nal 48 to ten~nal 49.
As a result, solenoid coil ~0 i.s no longer energized with full wave AC power, but instead with hal wave rectified AC power, since diode 50 prevents every alternate hal wave of current from reaching coil 40. Half wave power is not sufficient to hold armature 34 in the stable condition shown in Fig. 2. Instead, the half wave current causes the armature to oscillate toward and away rom valve seat 31, as illustrated in Fig~ 3~ Oqcillation of pilot valve me~er 35, carried by armature 34, in the region adjacent to valve seat 31 permits some liquid flow rom chamber 37 through orifice 30 to outlet port 12. However, the rate of this flow is smaller than when the pilot valve is fully open ~Fig. 2~. In fact, the flow rate through orifice 30 when valve member 35 oscillates is smaller than or about equal to the flow rate o inlet liquid through bleed hole 24 into chamber 23. Consequently, fluid pressure builds up in chamber 23 which, t~gether with the force of spriny 21 moves, valve member 20 into engagement with valve ~eat 14 to close the main valve, and discontinue high rate flow through the valve. Liquid fl~w continues .
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through the valve, at a low rate, from main inlet port 11, through b].eed hole 24, chamber 23, pilo~ inlet port 27, pilot chamher 37, and pilot outlet port ~8 to main outlet port 12. This low rate flow continues until the prescribed quantity of liquid has been dis-pensed, at which point power to terminals 45 and 46 is automatically switched off. Solenoid coil 40 i5 then completely deenergized, and the pilot valve closes (Fig. l).
An alternative circuit for energlzing solenoid coil 40 is shown in Fig. 5. Terminals 45' and 46', like terminals 45 and 46 of Fig. 4, are connectable to a source of conventional AC power.
Terminal 45' is connected in series with a diode 53, coil 40, and terminal 46'. Connected in parallel with coll 40 are series-connected diode 54 and switch 55. When power is applied to terminals 45' and 46', and switch 55 is closed, half wave power is applied to coil 40; however, current flow through coil 40 is through diode 54, and the valve is fully open ~Fig. 2) delivering high rate flow.
Opening of switch 55 causes half wave power to be applied to coil 40, whereby armature 34 oscillates (Fig. 3~, and low rate flow passes through the valve.
Although in the example described above the pilot valve of a pilot-operated valve is oscillated to provide reduced rate flow, tne invention could be applied to a single orifice valve wherein the solenoid armature directly operates the main valve member of the valve. In such a case, when full wave current i5 applied to the solenoid coil, the armature holds the valve open in stable condition for full rate flow~ When half wave current is applied to the coil, the armature and hence the valve member oscillate to permit only a more restricted flow -through the valve.
The invention has been shown and described .in preferred form only, and by way of example, and many variations may be made in the invention which will still be comprised within its spirit.
It is undarstood, therefore, that the invention is not limited ~o any specific form or embodiment except insofar as such limitat.ions are included in the appended claims.
... ~.. ~ .. v . _ . .... ..
Claims (7)
1. A pilot-operated dual flow rate valve, comprising:
(a) a main valve component having a main orifice, the main valve component having an open position, in which fluid flows through the orifice at a relatively high rate, and a closed position in which there is no fluid flow through the orifice, (b) a pilot valve component for controlling the main valve component, the pilot valve component having an open position in which fluid flows through the pilot valve component and in response thereto the main valve component opens, the total fluid flow leaving the valve being a combination of flow through the orifice of the main valve component and flow through the pilot valve component, and (c) means which decrease the rate of fluid flow through the pilot valve component, while the main valve component closes, without terminating fluid flow through the pilot valve component, so that the total fluid flow leaving the valve is only the fluid flowing through the pilot valve component, this latter flow being at a relatively low rate.
(a) a main valve component having a main orifice, the main valve component having an open position, in which fluid flows through the orifice at a relatively high rate, and a closed position in which there is no fluid flow through the orifice, (b) a pilot valve component for controlling the main valve component, the pilot valve component having an open position in which fluid flows through the pilot valve component and in response thereto the main valve component opens, the total fluid flow leaving the valve being a combination of flow through the orifice of the main valve component and flow through the pilot valve component, and (c) means which decrease the rate of fluid flow through the pilot valve component, while the main valve component closes, without terminating fluid flow through the pilot valve component, so that the total fluid flow leaving the valve is only the fluid flowing through the pilot valve component, this latter flow being at a relatively low rate.
2. A valve as defined in Claim 1 wherein the pilot valve component has a pilot valve orifice surrounded by a valve seat, and a pilot valve member movable into and out of engagement with the pilot valve seat to close and open the pilot valve, respectively, and said flow-rate-decreasing means includes controlling means for oscillating the pilot valve member in a direction toward and away from the pilot valve seat.
3. A valve as defined in Claim 2 wherein the pilot valve member controlling means is electrically energized.
4. A valve as defined in Claim 2 wherein the pilot valve member controlling means includes two distinct electrical power sources, one of which causes the pilot valve member to assume a stable condition in which the pilot valve is open, and the other of which causes the pilot valve member to oscillate.
5. A valve as defined in Claim 2 wherein the pilot valve member controlling means includes an electrical solenoid, an armature movable in response to energization and deenergization of the sole-noid, and means which energizes the solenoid to cause the armature to alternatively oscillate or maintain a stable position in which the pilot valve is open.
6. A valve as defined in Claim 5 wherein the pilot valve member is carried by the armature.
7. A valve as defined in Claim 5 wherein the means for energizing the solenoid includes means which alternatively applies half wave or full wave alternating current to the solenoid.
Priority Applications (6)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| AU14032/83A AU1403283A (en) | 1983-04-28 | 1983-04-28 | Dual flow rate valve |
| CA000427346A CA1210381A (en) | 1983-04-28 | 1983-05-03 | Dual flow rate valve |
| GB08312093A GB2139322A (en) | 1983-04-28 | 1983-05-04 | Dual flow rate valve |
| NL8301588A NL191855C (en) | 1983-04-28 | 1983-05-04 | Valve device for a large and a small flow of a liquid flow. |
| BR8302410A BR8302410A (en) | 1983-04-28 | 1983-05-09 | DOUBLE FLOW RATE VALVE |
| FR8307784A FR2545903B3 (en) | 1983-04-28 | 1983-05-10 | TWO FLOW VALVE |
Applications Claiming Priority (6)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| AU14032/83A AU1403283A (en) | 1983-04-28 | 1983-04-28 | Dual flow rate valve |
| CA000427346A CA1210381A (en) | 1983-04-28 | 1983-05-03 | Dual flow rate valve |
| GB08312093A GB2139322A (en) | 1983-04-28 | 1983-05-04 | Dual flow rate valve |
| NL8301588A NL191855C (en) | 1983-04-28 | 1983-05-04 | Valve device for a large and a small flow of a liquid flow. |
| BR8302410A BR8302410A (en) | 1983-04-28 | 1983-05-09 | DOUBLE FLOW RATE VALVE |
| FR8307784A FR2545903B3 (en) | 1983-04-28 | 1983-05-10 | TWO FLOW VALVE |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CA1210381A true CA1210381A (en) | 1986-08-26 |
Family
ID=34109208
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CA000427346A Expired CA1210381A (en) | 1983-04-28 | 1983-05-03 | Dual flow rate valve |
Country Status (6)
| Country | Link |
|---|---|
| AU (1) | AU1403283A (en) |
| BR (1) | BR8302410A (en) |
| CA (1) | CA1210381A (en) |
| FR (1) | FR2545903B3 (en) |
| GB (1) | GB2139322A (en) |
| NL (1) | NL191855C (en) |
Families Citing this family (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| AU4527585A (en) * | 1984-07-24 | 1986-01-30 | Donaghys Electronics Ltd. | Irrigation diaphragm valve control |
| GB2173573B (en) * | 1985-03-15 | 1989-04-19 | Cambridge Instr Ltd | Gas valve |
| EP0312781A1 (en) * | 1987-09-21 | 1989-04-26 | Hansa Metallwerke Ag | Remotely actuated sanitary fittings |
| US4793588A (en) * | 1988-04-19 | 1988-12-27 | Coyne & Delany Co. | Flush valve with an electronic sensor and solenoid valve |
| JP2742792B2 (en) * | 1988-06-28 | 1998-04-22 | 清原 まさ子 | Electromagnetic control device |
| DE3907209C1 (en) * | 1989-01-18 | 1990-03-01 | Danfoss A/S, Nordborg, Dk | |
| ES2213812T3 (en) * | 1997-06-16 | 2004-09-01 | Sicpa Holding S.A. | DOSAGE VALVE AND PROCEDURE FOR THE DOSED SUPPLY OF PASTA MEDIA. |
| WO2009153612A1 (en) | 2008-06-17 | 2009-12-23 | Wop Indústria E Comércio De Bombas Ltda. | Temperature control apparatus and method for an automotive cooling system |
Family Cites Families (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| GB1089220A (en) * | 1964-11-13 | 1967-11-01 | Ralph Dunning Cooksley | Improvements in or relating to fluid-flow control valves |
| GB1129520A (en) * | 1964-11-23 | 1968-10-09 | Monsanto Co | Improvements in or relating to fluid flow control devices |
| NL6801194A (en) * | 1967-02-01 | 1968-08-02 | ||
| US4158162A (en) * | 1977-06-20 | 1979-06-12 | Honeywell Inc. | Time-proportioning control system for earth-working machines |
| JPS55129810A (en) * | 1979-03-29 | 1980-10-08 | Nissan Motor Co Ltd | Control method for on-off electromagnetic valve |
| GB2076117B (en) * | 1980-05-20 | 1984-12-19 | Coward Noel Desmond | Solenoid operated irrigation valve and system |
-
1983
- 1983-04-28 AU AU14032/83A patent/AU1403283A/en not_active Abandoned
- 1983-05-03 CA CA000427346A patent/CA1210381A/en not_active Expired
- 1983-05-04 NL NL8301588A patent/NL191855C/en not_active IP Right Cessation
- 1983-05-04 GB GB08312093A patent/GB2139322A/en not_active Withdrawn
- 1983-05-09 BR BR8302410A patent/BR8302410A/en not_active IP Right Cessation
- 1983-05-10 FR FR8307784A patent/FR2545903B3/en not_active Expired
Also Published As
| Publication number | Publication date |
|---|---|
| AU1403283A (en) | 1984-11-01 |
| NL8301588A (en) | 1984-12-03 |
| FR2545903A1 (en) | 1984-11-16 |
| GB8312093D0 (en) | 1983-06-08 |
| NL191855B (en) | 1996-05-01 |
| FR2545903B3 (en) | 1986-07-25 |
| GB2139322A (en) | 1984-11-07 |
| BR8302410A (en) | 1984-12-18 |
| NL191855C (en) | 1996-09-03 |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| MKEX | Expiry |