GB2088021A - Fluid flow control valve - Google Patents
Fluid flow control valve Download PDFInfo
- Publication number
- GB2088021A GB2088021A GB8035302A GB8035302A GB2088021A GB 2088021 A GB2088021 A GB 2088021A GB 8035302 A GB8035302 A GB 8035302A GB 8035302 A GB8035302 A GB 8035302A GB 2088021 A GB2088021 A GB 2088021A
- Authority
- GB
- United Kingdom
- Prior art keywords
- valve
- actuating member
- variable flow
- flow rate
- section
- 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.)
- Granted
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
- F16K35/00—Means to prevent accidental or unauthorised actuation
- F16K35/02—Means to prevent accidental or unauthorised actuation to be locked or disconnected by means of a pushing or pulling action
- F16K35/027—Means to prevent accidental or unauthorised actuation to be locked or disconnected by means of a pushing or pulling action the locking mechanism being actuated by pushing or pulling the valve actuator, the valve actuator being rotated subsequently to bring the valve closure element in the desired position
-
- 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
- F16K31/44—Mechanical actuating means
- F16K31/52—Mechanical actuating means with crank, eccentric, or cam
- F16K31/524—Mechanical actuating means with crank, eccentric, or cam with a cam
- F16K31/52408—Mechanical actuating means with crank, eccentric, or cam with a cam comprising a lift valve
-
- 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
- F16K31/44—Mechanical actuating means
- F16K31/52—Mechanical actuating means with crank, eccentric, or cam
- F16K31/528—Mechanical actuating means with crank, eccentric, or cam with pin and slot
Landscapes
- Engineering & Computer Science (AREA)
- General Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Mechanically-Actuated Valves (AREA)
Abstract
The valve comprises a valve body (10, 11, 12) having a fluid inlet (19) and a fluid outlet (20), a valve actuating member angularly and axially movable in the valve body and an ON/OFF valve (24) and a variable flow cross-section valve (21) in series between the inlet and outlet. The ON/OFF valve is actuated by axial movement of the valve actuating member and the variable flow valve is actuated by angular movement of the valve actuating member. There is also an arrangement, such as a cam surface (15) on the valve body and a cam follower (28) on the valve actuating member, whereby the actuating member is moved axially under the bias of resilient means (27), to an OFF position, in which the ON/OFF valve is closed, when an attempt is made to set the variable flow cross-section valve to supply fluid at less than a predetermined minimum flow rate. <IMAGE>
Description
SPECIFICATION
Fluid flow control valve
This invention relates to a fluid flow control valve, particularly, but not exclusively, for controlling a supply of combustible gas used for gas-fired appliances such as gas cookers.
Some gas cookers have grill burners which operate successfully between a maximum gas flow rate and a minimum gas flow rate, but do have combustion problems when operated below the minimum gas flow rate. To avoid such problems gas taps have been provided which, when turned below a setting that determines said minimum flow rate cut off the gas supply completely. However, the known taps are complicated and expensive to manufacture and because they operate on a double push-in and turn principle prove somewhat confusing to an operator.
According to the present invention, there is provided a compound fluid flow control valve, comprising a valve body having a fluid inlet and a fluid outlet, a valve actuating member angularly and axially movable in the valve body, an ON/OFF valve and a variable flow cross-section valve in series between the inlet and the outlet, the
ON/OFF valve being actuated by axial movement of the valve actuating member and the variable flow cross-section valve being actuated by angular movement of the valve actuating member, and an arrangement whereby the actuating member is moved axially, under the bias of resilient means, to an OFF position, in which the ON/OFF valve is closed, when an attempt is made to set the variable flow cross-section valve to supply fluid at less than a predetermined minimum flow rate.
The he invention can provide a compact easy to operate valve which cannot be set to provide fuel flow below said predetermined minimum flow rate.
Preferably, the valve further comprises detent means whereby angular movement of the valve actuating member from said OFF position is only possible after the valve actuating member has been moved axially to open the ON/OFF valve.
This minimises the risk of the control valve being turned on accidentally.
Advantageously, the arrangement comprises a cam surface on either the valve body or the valve actuating member and a cam follower on the other of the valve body and the valve actuating member, said resilient means biassing the follower and cam surface towards each other, the cam surface being so shaped that when the valve actuating member is turned angularly in a sense to reduce the fluid flow rate through the variable flow cross-section valve and beyond a position in which the variable flow cross-section valve, in use, supplies fluid at said predetermined minimum flow rate, the valve actuating member is moved axially and angularly to the OFF position in which the
ON/OFF valve is closed and in which the flow rate through the variable cross-section valve will be zero (or just a leak flow) should the ON/OFF valve be opened by subsequent axial, non-angular
movement of the valve actuating member.
This can provide a valve having an ON/OFF
movement providing no flow (or just a leak flow)
when the ON/OFF valve is open, and a further
graduated movement for controlling the rate of
flow when the ON/OFF valve is open.
Other preferred or optional features are set
forth in claims 4-12.
The invention will now be more particularly
described, by way of example, with reference to
the accompanying drawings, wherein: Figure 1 is a sectional view of one embodiment
of a fluid flow control valve according to the
invention, and
Figure 2 is a developed view of the cam surface
of the valve of Figure 1.
Referring to the drawings the valve shown
therein is a variable control gas tap, which is
particularly suitable for the grill burner of a gas
cooker.
The valve has a body made up of a front cover 10. a main body 11, and a rear body 12.
A handle spindle 13 projects through the front
cover 10 which has an inwardly projecting collar
14 coaxially mounted about the spindle 13. The
inner axial end of the collar defines a cam surface 1 5 which will be described later. The spindle 13
extends into and is a close fit in a cylindrical bore 1 6 in the main body 11. An 'O' ring 17 retained in
a circumferential groove in the spindle 13 forms a
seal between the spindle and the front end of the
bore 1 6. The front cover 10 and main body 11 are
held together by screws 1 8.
The main body has a transverse gas inlet 19,
the inner end of which opens into the bore 1 6, and
the rear body 1 2 has an axially extending gas
outlet 20, but if desired, the gas flow direction can
be the reverse of that shown.
A variable flow cross-section valve is formed by
the bore 16 of the main body 11 and a rotary
valve member 21 formed buy a portion of the
spindle 1 3 in the bore 1 6. The rotary valve
member 21 has a part annular cut-out 22 which
extends axially to the rear end of the valve
member 21 and which co-operates with the gas
inlet 1 9 to give a zone of stepless variation of the
effective flow cross-section of the variable flow
valve. The rotary valve member 21 also has a
through hole 23 between a part cylindrical surface
portion thereof and a flat portion thereof which
borders the cut-out 22.The through hole 23
defines a predetermined minimum flow rate
through the variable flow valve when it is in full
registry with the gas inlet 1 9 as will be described
later and is so arranged that upon angular
movement of the rotary valve member 21 in a
sense to increase the flow rate through the
variable flow valve it remains in full registry with
the gas inlet 1 9 until the cut-out 22 begins to
communicate therewith.
The rear end of the spindle 13 has a turned
down portion which is a loose fit in a blind hole
formed in a soft seal poppet valve 24 consisting of
a valve seal holder 24a and an annular valve seal 24b located in an annular groove in the holder 24a. The valve 24 is biased by a compression spring 27 towards a seat 26 in the main body 11
and is a type of valve giving a good seal at low
contact pressure.
The main body 11 and rear body 12 are fixed together by co-operating internal and external screw-threads formed respectively thereon. The
poppet valve 24, therefore, may be easily
replaced.
The spindle 13 has a cam follower in the form of a niting pin 28 which is biased into engagement with the cam surface 15 by the spring 27. The cam surface is more clearly shown in deveioped view in Figure 2 and comprises a detent slot 29, a
ramped region 30 merging with a plateau region 31, and an axially directed step 32 at the end of the plateau region 31 remote from the ramped region 30.
When the niting pin 28 is in the detent slot 29 the poppet valve 24 is closed and the rotary valve member 21 is angularly orientated so that'neither the cut-out 22 nor the hole 23 communicate with the gas inlet. Therefore, the spindle 1 3 cannot be accidentally turned and should the poppet valve 24 be opened by axial, non-angular movement of the spindle 13 the flow rate through the variable cross-section valve will be zero (or just a leak flow rate). To turn on the valve, the spindle 1 3 is firstly pushed in to open the poppet valve 24 and to release the niting pin 28 from the detent slot 29.
The spindle 13 is then turned until the niting pin runs along the plateau region 31 of the cam surface. When the pin 28 engages the plateau region 31 at the end thereof adjacent to the ramped region 30, the hole 23 will be in full registry with the gas inlet 1 9 and gas will flow to the gas outlet at the predetermined minimum flow rate. As the spindle 1 3 is turned to move the pin 28 along the plateau region 31 towards the step 32 the cut-out will communicate with the gas inlet 1 9 to increase the flow rate. The maximum flow rate is determined when the pin 28 engages the step 32. Angular movement of the spindle 13 in the opposite direction will result in reduced gas flow.However, if an attempt is made to set the spindle in an angular position in which the pin 28 engages the ramped region 30 of the cam surface, the spring 27 will cause the pin 28 to be displaced into the detent slot 29. This will result in the poppet valve 24 closing and the variable flow valve being set to a zero flow rate.
As shown, the plateau region 31 of the cam surface has a small indentation 33 adjacent the ramped region 30. This indentation 33 cooperates with the pin 28 to indicate to an operator the minimum setting of the control valve.
Although, a single spring 27 serves to bias the poppet valve 24 towards its seat and the pin 28 on the spindle towards the cam surface, two separate springs could be used. However, in this case the front end of the main body 11 would have to be extended to accommodate a second spring which could be positioned between the front end of the main body 11 and a radially outwards abutment provided on the spindle 1 3.
Furthermore, the cam surface could be provided on the spindle 13 and the cam follower on the valve body.
Moreover, the ramped region 30 of the cam surface could be omitted so that the detent recess 29 is juxtaposed to the plateau region 31, but in this case the variable flow rate will not be set at zero flow when the poppet valve is opened by axial, non-angular movement of the spindle 13.
Finally, instead of being defined by the inner axial end of the collar 14, the cam surface could be defined by a slot in the wall of the collar.
Claims (14)
1. A compound fluid control valve, comprising a valve body having a fluid inlet and fluid outlet, a valve actuating member angularly and axially movable in the valve body, an ON/OFF valve and a variable flow cross-section valve in series between the inlet and the outlet, the ON/OFF valve being actuated by axial movement of the valve actuating member and the variable flow cross-section valve being actuated by angular movement of the valve actuating member, and an arrangement whereby the actuating member is moved axially, under the bias of resilient means, to an OFF position, in which the ON/OFF valve is closed, when an attempt is made to set the variable flow crosssection valve to supply fluid at less than a predetermined minimum flow rate.
2. The valve of claim 1, further comprising detent means whereby angular movement of the valve actuating member from said OFF position is only possible after the valve actuating member has been moved axially to open the ON/OFF valve.
3. The valve of claim 1 or claim 2, wherein the arrangement comprises a cam surface on either the valve body or the valve actuating member and a cam follower on the other of the valve body and the valve actuating member, said resilient means biasing the follower and cam surface towards each other, the cam surface being so shaped that when the valve actuating member is turned angularly in a sense to reduce the fluid flow rate through the variable flow cross-section valve and beyond a position in which the variable flow crosssection valve, in use, supplies fluid at said predetermined minimum flow rate, the valve actuating member is moved axially and angularly to the OFF position in which the ON/OFF valve is closed and in which the flow rate through the variable cross-section valve will be zero (or just a leak flow) should the ON/OFF valve by opened by subsequent axial, non-angular movement of the valve actuating member.
4. The valve of claim 3 when dependent on claim 2, wherein said detent means comprises an axially extending slot in said cam surface for receiving the cam follower when the valve actuating member is in said OFF position.
5. The valve of claim 3 or claim 4, wherein the cam surface has an abutment engageable with the cam follower to determine a maximum flow rate through the variable flow cross-section valve.
6. The valve of anyone of claims 3-5, wherein the cam follower is a pin extending radially outwards from the valve actuating member and the cam surface is provided on the valve body and is coaxial with the valve actuating member.
7. The valve of anyone of claims 3-6, wherein the cam surface has a small indentation which cooperates with the cam follower to indicate said predetermined minimum flow rate.
8. The valve of anyone of the preceding claims, wherein the ON/OFF valve has an axially movable valve member biassed towards a seat by resilient means and co-operable with the valve actuating member for actuation of the ON/OFF valve.
9. The valve of claim 8, wherein the ON/OFF valve is a soft seat poppet valve.
10. The valve of anyone of the preceding claims, wherein the variable flow cross-section valve comprises a rotary valve member in a bore in the valve body the rotary valve member having a cut-out which cooperates with one of the fluid inlet or outlet to give a zone of step-less variation of the effective flow cross-section of the variable flow valve and a through hole one end of which is angularly spaced from the cut-out and the other end of which communicates with the cut-out to define the predetermined minimum flow rate through the variable flow valve when in full registry with said one of the fluid inlet or outlet.
11. The valve of claim 10, wherein the rotary valve member is formed by a portion of the valve actuating member.
1 2. The valve of anyone of the preceding claims, wherein the variable flow cross-section valve is upstream of the ON/OFF valve.
13. A compound fluid flow control valve, substantially as hereinbefore described with reference to, and as shown in, the accompanying drawings.
14. A gas appliance having a compound valve as claimed in anyone of the preceding claims.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| GB8035302A GB2088021B (en) | 1980-11-03 | 1980-11-03 | Fluid flow control valve |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| GB8035302A GB2088021B (en) | 1980-11-03 | 1980-11-03 | Fluid flow control valve |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| GB2088021A true GB2088021A (en) | 1982-06-03 |
| GB2088021B GB2088021B (en) | 1983-08-17 |
Family
ID=10517057
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| GB8035302A Expired GB2088021B (en) | 1980-11-03 | 1980-11-03 | Fluid flow control valve |
Country Status (1)
| Country | Link |
|---|---|
| GB (1) | GB2088021B (en) |
Cited By (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2000046535A1 (en) * | 1999-02-01 | 2000-08-10 | Piat Moise | Cam and valve fittings for sanitary ware |
| USD492753S1 (en) | 2003-04-25 | 2004-07-06 | Procter & Gamble | Fluidic cartridge end piece |
| USD494654S1 (en) | 2003-04-25 | 2004-08-17 | Procter & Gamble Co. | Fluidic cartridge fittings |
| EP1509715A1 (en) * | 2002-05-17 | 2005-03-02 | Advanced Products Pty Ltd | Gas control valve |
| WO2018130709A1 (en) * | 2017-01-16 | 2018-07-19 | Grohe Ag | Valve for a flush-mounted body of a sanitary fitting, having a control knob rotatably fastened to a valve knob |
| US10525387B2 (en) | 2017-04-06 | 2020-01-07 | Whirlpool Corporation | Filter cartridge |
| US10584040B2 (en) | 2017-10-06 | 2020-03-10 | Whirlpool Corporation | Filter cartridge |
-
1980
- 1980-11-03 GB GB8035302A patent/GB2088021B/en not_active Expired
Cited By (13)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2000046535A1 (en) * | 1999-02-01 | 2000-08-10 | Piat Moise | Cam and valve fittings for sanitary ware |
| EP1509715A1 (en) * | 2002-05-17 | 2005-03-02 | Advanced Products Pty Ltd | Gas control valve |
| EP1509715A4 (en) * | 2002-05-17 | 2006-07-26 | Advanced Prod Pty | Gas control valve |
| US7287551B2 (en) | 2002-05-17 | 2007-10-30 | Advanced Products Pty, Ltd. | Gas control valve |
| USD492753S1 (en) | 2003-04-25 | 2004-07-06 | Procter & Gamble | Fluidic cartridge end piece |
| USD494654S1 (en) | 2003-04-25 | 2004-08-17 | Procter & Gamble Co. | Fluidic cartridge fittings |
| WO2018130709A1 (en) * | 2017-01-16 | 2018-07-19 | Grohe Ag | Valve for a flush-mounted body of a sanitary fitting, having a control knob rotatably fastened to a valve knob |
| CN110573778A (en) * | 2017-01-16 | 2019-12-13 | 高仪股份公司 | Valve for a concealed wire mounting body of a plumbing fixture fitting having a control knob rotatably secured to a valve knob button |
| CN110573778B (en) * | 2017-01-16 | 2021-05-04 | 高仪股份公司 | Valve for a concealed wire mounting body of a plumbing fixture fitting having a control knob rotatably secured to a valve knob button |
| US11105438B2 (en) | 2017-01-16 | 2021-08-31 | Grohe Ag | Valve for a flush-mounted body of a sanitary fitting, having a control knob rotatably fastened to a valve knob |
| US10525387B2 (en) | 2017-04-06 | 2020-01-07 | Whirlpool Corporation | Filter cartridge |
| US10967313B2 (en) | 2017-04-06 | 2021-04-06 | Whirlpool Corporation | Filter cartridge |
| US10584040B2 (en) | 2017-10-06 | 2020-03-10 | Whirlpool Corporation | Filter cartridge |
Also Published As
| Publication number | Publication date |
|---|---|
| GB2088021B (en) | 1983-08-17 |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| 732E | Amendments to the register in respect of changes of name or changes affecting rights (sect. 32/1977) | ||
| PCNP | Patent ceased through non-payment of renewal fee |
Effective date: 19961103 |