GB2180324A - Flow controller - Google Patents
Flow controller Download PDFInfo
- Publication number
- GB2180324A GB2180324A GB08621886A GB8621886A GB2180324A GB 2180324 A GB2180324 A GB 2180324A GB 08621886 A GB08621886 A GB 08621886A GB 8621886 A GB8621886 A GB 8621886A GB 2180324 A GB2180324 A GB 2180324A
- Authority
- GB
- United Kingdom
- Prior art keywords
- sleeve
- guide
- flow controller
- control piston
- cavity
- 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
-
- G—PHYSICS
- G05—CONTROLLING; REGULATING
- G05D—SYSTEMS FOR CONTROLLING OR REGULATING NON-ELECTRIC VARIABLES
- G05D7/00—Control of flow
- G05D7/01—Control of flow without auxiliary power
- G05D7/0106—Control of flow without auxiliary power the sensing element being a flexible member, e.g. bellows, diaphragm, capsule
Landscapes
- Physics & Mathematics (AREA)
- General Physics & Mathematics (AREA)
- Engineering & Computer Science (AREA)
- Automation & Control Theory (AREA)
- Safety Valves (AREA)
- Flow Control (AREA)
- Lift Valve (AREA)
Abstract
A flow controller, especially but not exclusively for maintaining a constant rate of water supply to a water heater, comprises a spring-loaded control piston (1) which is moveable in a guide sleeve (4) through which fluid flows. The guide sleeve (4) has at least one radial inlet opening (3). The guide sleeve (4), the control piston (1) moveably mounted in the guide sleeve (4), and a closing cover (8) which serves as a spring abutment constitute a unit which is replaceably fitted in a mating cavity (5) of the flow path. The sleeve (4) is joined by a screw or snap connection to a cap 13 which defines a valve seat. <IMAGE>
Description
SPECIFICATION
Flow controller
This invention relates to a flow controller, especially but not exclusively for maintaining a constant rate of water supply to a water heater, comprising a spring-loaded control piston, which is moveable in a guide through which fluid flows.
It is an aim of the invention to simplify the structure, operation and maintenance of such a flow controller and to facilitate its replacement in case of need.
Accordingly, the present invention is directed to a flow controller as set out in the opening paragraph of this specification, in which the guide has at least one radial inlet opening and the guide, the control piston moveably mounted in the guide, and a closing cover which serves as a spring abutment constitute a unit, which is replaceably fitted in a mating cavity of the flow path.
In a preferred embodiment of the invention the guide comprises a cylindrical sleeve, which is preferably made of a synthetic plastics material and has radial inlet openings and which at that end which faces the closing cover carries a seal for the control piston, and the sleeve is adapted to be fixed by means of the cover and preferably by a screw joint at the open end of the cavity which accommodates the unit.
In that case that end of the sleeve which is opposite to the cover may bear on an abutment which is provided in the cavity and which forms a valve seat co-operating with the tapered adjacent portion of the control piston.
The guide and the abutment may be accommodated, if desired, in a housing, which encloses the unit.
Three examples of a flow controller made in accordance with the present invention are shown diagrammatically in the accompanying drawings, in which Figs. 1 to 3 are respective axial sectional views of the three examples.
In Fig. 1, a control piston 1 comprises a solid of revolution which has a diameter that varies in a particular manner over the length of the piston. The piston comprises a cylindrical portion, which is guided in an annular seal 2, a portion which is reduced in diameter and is positioned adjacent to radial inlet openings 3 of the sleeve 4 and of an upper cap 13, and a tapered portion, which has a curved cross section to define a valve gap 7 of variable size with an abutment 6, which is disposed in a cavity 5 of the flow path.
The control piston 1 is biased by a spring 9, which bears on a screw-threaded cover 8, by which the unit comprising the parts stated is retained in one part of the cavity 5, which constitutes a portion of the flow path. That unit may be enclosed in a housing 10 (shown in Figs. 2 and 3). The sleeve 4 is urged against the abutment 6 in sealing contact therewith.
Water, for example, to be supplied at a constant flow rate flows through an inlet 11 into the cavity 5 and from the annular clearance defined between the sleeve 4 (or the upper cap 13) and the housing 10 or the inside surface of the cavity enters the sleeve 4 through one or more openings 3. In dependence upon the current size of the valve gap 7 the water is delivered through the outlet line 12 to the appliance to be supplied, for example, to a water heater. The flow rate is automatically kept constant owing to the hydraulically effective shape of the control piston 1 moving in the sleeve 4 under the action of the flow pressure and of the spring 9.
In the two embodiments of the invention shown in Figs. 2 and 3, the guide sleeve 4, preferably made of a synthetic plastics material, comprises two parts and may comprise an upper cap 13 that is made of a more wear-resistant material, such as metal, and constitutes a seat for the controller. That seat may be clipped to the guide sleeve 4 in one embodiment (Fig. 2) and may be screw-connected to the guide sleeve 4 in the other embodiment (Fig. 3). The upper caps 13 serve to avoid erosion damage caused by the flowing fluid and are also provided with radial inlet openings.
1. A flow controller, especially but not exclusively for maintaining a constant rate of water supply to a water heater, comprising a spring-loaded control piston, which is moveable in a guide through which fluid flows, in which the guide has at least one radial inlet opening and the guide, the control piston moveably mounted in the guide, and a closing cover which serves as a spring abutment constitute a unit, which is replaceably fitted in a mating cavity of the flow path.
2. A flow controller according to claim 1, in which the guide comprises a cylindrical sleeve, which is preferably made of a synthetic plastics material and has radial inlet openings and which at that end which faces the closing cover carries a seal for the control piston, and the sleeve is adapted to be fixed by means of the cover and preferably by a screw joint at the open end of the cavity which accommodates the unit.
3. A flow controller according to claim 2, in which that end of the sleeve which is opposite to the cover bears on an abutment which is provided in the cavity and which forms a valve seat cooperating with a tapered adjacent portion of the control piston.
4. A flow controller according to claim 3, further comprising a housing which encloses the guide and the abutment.
5. A flow controller according to claim 4,
**WARNING** end of DESC field may overlap start of CLMS **.
Claims (7)
1. A flow controller, especially but not exclusively for maintaining a constant rate of water supply to a water heater, comprising a spring-loaded control piston, which is moveable in a guide through which fluid flows, in which the guide has at least one radial inlet opening and the guide, the control piston moveably mounted in the guide, and a closing cover which serves as a spring abutment constitute a unit, which is replaceably fitted in a mating cavity of the flow path.
2. A flow controller according to claim 1, in which the guide comprises a cylindrical sleeve, which is preferably made of a synthetic plastics material and has radial inlet openings and which at that end which faces the closing cover carries a seal for the control piston, and the sleeve is adapted to be fixed by means of the cover and preferably by a screw joint at the open end of the cavity which accommodates the unit.
3. A flow controller according to claim 2, in which that end of the sleeve which is opposite to the cover bears on an abutment which is provided in the cavity and which forms a valve seat cooperating with a tapered adjacent portion of the control piston.
4. A flow controller according to claim 3, further comprising a housing which encloses the guide and the abutment.
5. A flow controller according to claim 4, in which the sleeve is surrounded by an upper cap, which is made of wear-resistant material, such as metal.
6. A flow controller according to claim 5, having a snap joint or clipped joint connecting the sleeve to the upper cap.
7. A flow controller according to claim 5, having a screw joint connecting the sleeve to the upper cap.
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
DE19858526293 DE8526293U1 (en) | 1985-09-12 | 1985-09-12 | Flow regulator |
Publications (3)
Publication Number | Publication Date |
---|---|
GB8621886D0 GB8621886D0 (en) | 1986-10-15 |
GB2180324A true GB2180324A (en) | 1987-03-25 |
GB2180324B GB2180324B (en) | 1989-08-31 |
Family
ID=6785246
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
GB8621886A Expired GB2180324B (en) | 1985-09-12 | 1986-09-11 | Flow controller |
Country Status (8)
Country | Link |
---|---|
AT (1) | AT392853B (en) |
BE (1) | BE905376A (en) |
CH (1) | CH670523A5 (en) |
DE (2) | DE8526293U1 (en) |
FR (1) | FR2587130A1 (en) |
GB (1) | GB2180324B (en) |
IT (1) | IT209612Z2 (en) |
NL (1) | NL8602261A (en) |
Citations (5)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
GB586809A (en) * | 1944-03-16 | 1947-04-01 | Merit Engineering Inc | Improvements in relief valve |
US3828821A (en) * | 1968-10-08 | 1974-08-13 | J Dotter | Pressure regulator faucet slide valve |
EP0045268A2 (en) * | 1980-07-29 | 1982-02-03 | Lucas France S.A. | Throttling device |
GB2107433A (en) * | 1981-10-09 | 1983-04-27 | Michael Roderick Oliver | Protector valve |
GB2131207A (en) * | 1982-09-23 | 1984-06-13 | Integrated Hydraulics Limited | A control valve |
Family Cites Families (15)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
GB1022342A (en) * | 1962-01-15 | 1966-03-09 | Hobourn Eaton Mfg Co Ltd | Improvements relating to flow control valves |
DE1969315U (en) * | 1963-12-17 | 1967-09-28 | Bosch Gmbh Robert | FLOW REGULATOR FOR PRESSURE MEDIUM |
US3422842A (en) * | 1966-11-16 | 1969-01-21 | Dole Valve Co | Adjustable flow control |
US3621875A (en) * | 1969-11-25 | 1971-11-23 | Cessna Aircraft Co | Pressure-actuated valve |
US3809108A (en) * | 1973-04-16 | 1974-05-07 | Textron Inc | Monitor and automatic shutoff for gas regulators |
US3900045A (en) * | 1973-09-27 | 1975-08-19 | Robertshaw Controls Co | Fulcrum pressure regulator |
FR2253413A5 (en) * | 1973-11-30 | 1975-06-27 | Giraud Henri | Pressure controlled flow regulator for liquid filter circuit - progressively reduces flow as filter pressure increases |
DE2616251C2 (en) * | 1976-04-13 | 1986-05-15 | Robert Bosch Gmbh, 7000 Stuttgart | Pressure relief and suction valve |
FR2385961A1 (en) * | 1977-04-01 | 1978-10-27 | Blume Gert | Hot water mixing valve - has ports to allow recirculation of heated water through valve body and thermostat to control position of sprung regulating piston |
US4171004A (en) * | 1977-07-13 | 1979-10-16 | Vending Components, Inc. | Safety regulator for fluid pressure |
US4330012A (en) * | 1980-07-21 | 1982-05-18 | Chadwick Russell D | Valve for aerial spraying |
GB2102538B (en) * | 1981-05-28 | 1984-12-12 | Fluid Devices Ltd | Fluid flow control valves |
US4440192A (en) * | 1982-09-23 | 1984-04-03 | United Technologies Corporation | Minimization of pressure drop variation in flow controllers |
GB8400440D0 (en) * | 1984-01-09 | 1984-02-08 | Baj Vickers Ltd | Pressure regulating valve assembly |
DE3429003C1 (en) * | 1984-08-07 | 1986-02-13 | Georg Schünemann u. Co (GmbH & Co), 2800 Bremen | Flow control valve |
-
1985
- 1985-09-12 DE DE19858526293 patent/DE8526293U1/en not_active Expired
-
1986
- 1986-08-22 CH CH337086A patent/CH670523A5/de not_active IP Right Cessation
- 1986-08-26 DE DE3628899A patent/DE3628899C2/en not_active Expired - Fee Related
- 1986-08-27 AT AT231486A patent/AT392853B/en not_active IP Right Cessation
- 1986-09-04 BE BE0/217121A patent/BE905376A/en not_active IP Right Cessation
- 1986-09-05 IT IT2293186U patent/IT209612Z2/en active
- 1986-09-09 NL NL8602261A patent/NL8602261A/en not_active Application Discontinuation
- 1986-09-11 GB GB8621886A patent/GB2180324B/en not_active Expired
- 1986-09-11 FR FR8612829A patent/FR2587130A1/en not_active Withdrawn
Patent Citations (5)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
GB586809A (en) * | 1944-03-16 | 1947-04-01 | Merit Engineering Inc | Improvements in relief valve |
US3828821A (en) * | 1968-10-08 | 1974-08-13 | J Dotter | Pressure regulator faucet slide valve |
EP0045268A2 (en) * | 1980-07-29 | 1982-02-03 | Lucas France S.A. | Throttling device |
GB2107433A (en) * | 1981-10-09 | 1983-04-27 | Michael Roderick Oliver | Protector valve |
GB2131207A (en) * | 1982-09-23 | 1984-06-13 | Integrated Hydraulics Limited | A control valve |
Also Published As
Publication number | Publication date |
---|---|
DE3628899A1 (en) | 1987-03-19 |
IT209612Z2 (en) | 1988-10-10 |
IT8622931V0 (en) | 1986-09-05 |
DE8526293U1 (en) | 1985-10-24 |
FR2587130A1 (en) | 1987-03-13 |
BE905376A (en) | 1986-12-31 |
GB8621886D0 (en) | 1986-10-15 |
NL8602261A (en) | 1987-04-01 |
DE3628899C2 (en) | 1994-11-24 |
AT392853B (en) | 1991-06-25 |
GB2180324B (en) | 1989-08-31 |
CH670523A5 (en) | 1989-06-15 |
ATA231486A (en) | 1990-11-15 |
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Legal Events
Date | Code | Title | Description |
---|---|---|---|
PCNP | Patent ceased through non-payment of renewal fee |
Effective date: 19930911 |