GB2114741A - Actuators - Google Patents
Actuators Download PDFInfo
- Publication number
- GB2114741A GB2114741A GB08203813A GB8203813A GB2114741A GB 2114741 A GB2114741 A GB 2114741A GB 08203813 A GB08203813 A GB 08203813A GB 8203813 A GB8203813 A GB 8203813A GB 2114741 A GB2114741 A GB 2114741A
- Authority
- GB
- United Kingdom
- Prior art keywords
- bellows
- actuator
- temperature responsive
- responsive means
- housing
- 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.)
- Withdrawn
Links
Classifications
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F03—MACHINES OR ENGINES FOR LIQUIDS; WIND, SPRING, OR WEIGHT MOTORS; PRODUCING MECHANICAL POWER OR A REACTIVE PROPULSIVE THRUST, NOT OTHERWISE PROVIDED FOR
- F03G—SPRING, WEIGHT, INERTIA OR LIKE MOTORS; MECHANICAL-POWER PRODUCING DEVICES OR MECHANISMS, NOT OTHERWISE PROVIDED FOR OR USING ENERGY SOURCES NOT OTHERWISE PROVIDED FOR
- F03G7/00—Mechanical-power-producing mechanisms, not otherwise provided for or using energy sources not otherwise provided for
- F03G7/06—Mechanical-power-producing mechanisms, not otherwise provided for or using energy sources not otherwise provided for using expansion or contraction of bodies due to heating, cooling, moistening, drying or the like
-
- 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
- F16K31/02—Actuating devices; Operating means; Releasing devices electric; magnetic
- F16K31/025—Actuating devices; Operating means; Releasing devices electric; magnetic actuated by thermo-electric means
-
- G—PHYSICS
- G05—CONTROLLING; REGULATING
- G05D—SYSTEMS FOR CONTROLLING OR REGULATING NON-ELECTRIC VARIABLES
- G05D23/00—Control of temperature
- G05D23/19—Control of temperature characterised by the use of electric means
- G05D23/1919—Control of temperature characterised by the use of electric means characterised by the type of controller
- G05D23/1921—Control of temperature characterised by the use of electric means characterised by the type of controller using a thermal motor
Landscapes
- Engineering & Computer Science (AREA)
- General Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Chemical & Material Sciences (AREA)
- Combustion & Propulsion (AREA)
- Physics & Mathematics (AREA)
- General Physics & Mathematics (AREA)
- Automation & Control Theory (AREA)
- Temperature-Responsive Valves (AREA)
- Actuator (AREA)
- Fluid-Pressure Circuits (AREA)
Abstract
An actuator comprises a variable volume bellows (16) that is connected with an operating rod (18) to move this rod in dependence upon changes in volume of the bellows. The bellows is part of a temperature responsive means (16/20/22) and the actuator further comprises a Peltier thermo- electric assembly (24) selectively operable to apply a heating or a cooling effect to the temperature responsive means to vary the volume of the bellows and thus move the rod. As described a valve (1) is operated and the temperature responsive means is insulated from hot flow line fluid by a further bellows (12) disposed between the valve and the temperature responsive means and through which the rod passes. The actuator is connected to a remote controller (26) by simple wiring (25) merely sufficient to supply operating current to the Peltier thermo-electric assembly (24). <IMAGE>
Description
SPECIFICATION
Actuators
This invention relates to actuators for operating mechanisms such as valves. If it is desired to operate a mechanism from a control location remote from the mechanism, or to operate from a single control location several mechanisms that are remote from one another, it is desirable that lines of communication between the control location and the or each mechanism be as simple as possible, and likewise that an actuator for the
or each mechanism be of simple but reliable construction.
According to the present invention there is provided an actuator comprising a variable volume member that is connected with an operating member of the actuator to move this operating member in dependence upon changes in volume of the variable volume member, the variable volume member being part of a temperature responsive means and the actuator further comprising a Peltier thermoelectric assembly selectively operable to apply a heating or a cooling effect to the temperature responsive means to vary the volume of the variable volume member and thereby bring about movement of the operating member.Such an actuator can be connected to a remote control location by a simple wiring merely sufficient to supply operating current to the Peltier thermo-electric assembly, and the actuator is of simple but reliable construction as it is a Peltier thermoelectric assembly that is used as a motivating means.
For a better understanding of the invention and to show how the same may be carried into effect, reference will now be made, by way of example, to the accompanying drawing in which the single
Figure is a sectional side view, partly diagrammatic, of a valve equipped with an actuator connected to a controller remote therefrom.
In the Figure the valve 1 has its valve member 2 held off its valve seat 3 by a compression spring 4 so that the valve is normally open. The body of the valve includes a housing 5 for the spring 4.
The spring 4 is mounted on the stem 6 of the valve member, this stem projecting into the housing 5 and terminating therein.
The valve stem 6 enters the housing 5 at one end and at the other end the housing 5 has secured to it by a nut 7 the actuator 8, the nut 7 clamping fast to the housing end a shoulder 9A of a bush 9 that is fast with one end of a first housing 10 of the actuator. Within this end of the first housing 10, and also fast therewith, is a shouldered member 11.
The shouldered member 11 has one end of a variable volume member in the form of a first bellows 12 fast with it, this bellows being housed in the first housing 10 and being fast at its other end with a plug 13. Adjacent this other end of the bellows 12 the first housing 10 is closed by a bush 14 which is fast in one end of a second housing 1 5. Within this second housing 1 5 there is another variable volume member in the form of a second bellows 1 6 which has one end fast with a shouldered portion 1 4A of the bush 14, and which has its other end closed by a plug 17.
An operating member of the actuator is constituted by a rod 1 8 which at one end is in abutment with the end of the valve stem 6 remote from the valve member 2. This rod extends through the bush 9, the shouldered member 11, the plug 13 and the bush 14 to the plug 17. The rod 18 is a sliding fit in the bush 9 and in the shouldered member 11; is fast in fluid-tight manner with the plug 13; is a sliding fit in the bush 14; and is fast in fluid-tight manner with the plug 17. The interior of the bellows 12 is sealed by the connection of this bellows to the shouldered member 11 and the plug 13. Likewise the interior of the bellows 1 6 is sealed by the connection thereof to the plugs 13 and 17.
The rod 1 8 passes through each of the bellows with clearance so that between the rod and the interior wall of the first bellows 12 there is defined a variable volume chamber 19, and between the rod and the interior of the second bellows 1 6 there is defined a variable volume chamber 20. Further variable volume chambers 21 and 22 are defined between the exterior of the bellows 12 and the interior wall of the housing 10 (chamber 21), and between the exterior of the bellows 1 6 and the interior wall of the housing 1 5 (chamber 22).The chamber 22 contains an expansible fill of temperature responsive medium such as oil which will expand with rise in temperature, the bellows 16 and this fill in the chamber 22 constituting a temperature responsive means for moving the rod 1 8 in dependence upon changes in volume of the bellows 16.
Associated with the chamber 22 is a heat pump 23 consisting of a Peltier thermo-electric assembly mounted on the housing 16 and including a heat sink 24. This heat pump is connected by electrical leads 25 to a control box 26 having electrical power supply leads 27.
In use the valve 1 is connected in a fluid flow line, for example a steam line. In the open condition illustrated line fluid will be on both sides of the valve member, and is able to enter the first housing 5 and the interior (chamber 19) of the first bellows 12. This bellows, however, acts as a seal and serves to isolate the expansible fill in the chamber 22 in the second housing 1 5 from the line fluid. In particular, therefore, where the line fluid is a hot fluid such as steam, the expansible fill is insulated from the effects of the heat of the line fluid.
The valve 1 can be operated, that is caused to close or permitted to open, from the control box 26 by setting the control box to supply current to the Peltier thermo-elctric assembly 23.
Dependent upon the selected direction of current flow either a heating or cooling effect is obtained at the Peltier thermo-electric assembly 23. If heat is generated, the expansible fill in the chamber 22 increases in volume. This causes the bellows 16 to contract, which drives the rod 18 in the direction to act on the valve stem 6 to close the valve against the action of the spring 4. The
bellows 12 also contracts to accommodate this
movement of the rod 18. By subsequently
reversing the current flow to the Peltier thermo
electric assembly 23, a cooling effect can be
obtained to reduce the volume of the expansible fill, whereby the spring 4 is permitted to assert
itself to open the valve.
As a Peltier thermo-electric assembly is of inherentiy simple construction, requiring no moving parts, there is included in the actuator a source of motivating power that is of simple but reliable construction. The remainder of the actuator is also of simple construction with a minimum of moving parts. Because of the cooling effect that can be obtained, the provision of the Peltier thermo-electric assembly also enables rapid response to be obtained in both directions of operation of the actuator. Furthermore stepless operation is achieved by virtue of using such an assembly as the source of motivating power.
The bellows 12 constitutes a seal of conveniently simple construction that by its size, elongated in the direction away from the valve, serves well to insulate the expansible fill from hot flow line fluid. In situations where heat associated with the mechanism to be operated is not a problem, the bellows 12 can be replaced by some other form of seal comparatively compact in the direction away from the valve, for example one or more O-ring seal(s). It is also to be understood that the mechanism to be operated can be other than a valve, and that more than one mechanism can be operated from a single control box. The connection of the control box to the or each actuator requires only a minimum of simple electrical leads.
Claims (7)
1. An actuator comprising a variable volume member that is connected with an operating member of the actuator to move this operating member in dependence upon changes in volume of the variable volume member, the variable volume member being part of a temperature responsive means and the actuator further comprising a Peltier thermo-electric assembly selectively operable to apply a heating or a cooling effect to the temperature responsive means to vary the volume of the variable volume member and thereby bring about movement of the operating member.
2. An actuator as claimed in claim 1, wherein the variable volume member is a bellows, wherein the temperature responsive means further includes a housing in which this bellows is disposed with its interior sealed from the interior of the housing, and wherein a chamber defined between the inner wall of the housing and the outer wall of the bellows contains an expansible fill of temperature responsive medium that expands with rise in temperature.
3. An actuator as claimed in Claim 2, wherein the operating member is a rod which is fast with the bellows so as to be moved by change in volume of the bellows, and wherein this rod extends from the remainder of the actuator through an elongated seal that serves to insulate the temperature responsive means from hot medium if present in the mechanism to be operated by the actuator.
4. An actuator as claimed in claim 3, wherein the elongated seal is a bellows through which the rod extends, the interior of this bellows being sealed to the rod at the end of this bellows that is adjacent the temperature responsive means.
5. An actuator as claimed in claim 4, wherein the elongated seal forming bellows is disposed in a housing, the interior of this bellows being sealed from the interior of this housing.
6. An actuator as claimed in any one of the preceding claims and further comprising a controller electrically connected to the Peltier thermo-electric assembly for operating this assembly to apply said heating or said cooling effect to the temperature responsive means.
7. An actuator substantially as hereinbefore described with reference to the accompanying drawing.
Priority Applications (6)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
GB08203813A GB2114741A (en) | 1982-02-10 | 1982-02-10 | Actuators |
DK52283A DK52283A (en) | 1982-02-10 | 1983-02-08 | TRIGGER |
FR8302063A FR2521319A1 (en) | 1982-02-10 | 1983-02-09 | OPERATION DEVICE |
IT19524/83A IT1161616B (en) | 1982-02-10 | 1983-02-10 | ACTUATOR ELEMENT FOR THE OPERATION OF MECHANISMS, IN PARTICULAR VALVES |
JP58021372A JPS58149407A (en) | 1982-02-10 | 1983-02-10 | Actuator |
DE19833304585 DE3304585A1 (en) | 1982-02-10 | 1983-02-10 | ACTUATING DEVICE |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
GB08203813A GB2114741A (en) | 1982-02-10 | 1982-02-10 | Actuators |
Publications (1)
Publication Number | Publication Date |
---|---|
GB2114741A true GB2114741A (en) | 1983-08-24 |
Family
ID=10528218
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
GB08203813A Withdrawn GB2114741A (en) | 1982-02-10 | 1982-02-10 | Actuators |
Country Status (6)
Country | Link |
---|---|
JP (1) | JPS58149407A (en) |
DE (1) | DE3304585A1 (en) |
DK (1) | DK52283A (en) |
FR (1) | FR2521319A1 (en) |
GB (1) | GB2114741A (en) |
IT (1) | IT1161616B (en) |
Cited By (6)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US4711270A (en) * | 1986-01-27 | 1987-12-08 | Eltek S.P.A. | Thermoelectric valve for channeling refrigerant gases into different tubes in refrigeration devices |
GB2198213A (en) * | 1986-11-24 | 1988-06-08 | Peter Robert Durdin | Improvements in or relating to fluid regulating valves |
WO1992017703A1 (en) * | 1991-04-08 | 1992-10-15 | Schneider Edward T | High force thermochemical actuator |
GB2301667A (en) * | 1995-06-03 | 1996-12-11 | Patrick Gerard Graham | Thermostatic valve control |
EP1136227A2 (en) * | 2000-03-15 | 2001-09-26 | XENON Technologie- und Qualitätsberatung GmbH | Actuating device for adjusting die lips in extrusion molding |
CN114087420A (en) * | 2021-11-17 | 2022-02-25 | 济南新材料产业技术研究院 | Sealing structure of valve rod and valve |
Families Citing this family (8)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US3034808A (en) * | 1958-10-09 | 1962-05-15 | Consolidation Coal Co | Flexible pipe coupling |
US3257118A (en) * | 1962-06-04 | 1966-06-21 | Utility Tool Company | Pipe repair joint |
JPS62215106A (en) * | 1986-03-17 | 1987-09-21 | Nibetsukusu Kk | Heat actuated cylinder |
US4753461A (en) * | 1986-04-15 | 1988-06-28 | International Clamp Company | Coupling for coupling tubular members |
US4699405A (en) * | 1986-04-15 | 1987-10-13 | International Clamp Company | Coupling for coupling tubular members |
JPH0768967B2 (en) * | 1986-08-20 | 1995-07-26 | 株式会社日立製作所 | Hydraulic device |
JPS6421209A (en) * | 1986-12-13 | 1989-01-24 | Iwao Uetoko | Temperature responding cylinder |
DE3832737A1 (en) * | 1988-09-27 | 1990-03-29 | Ego Italiana | TEMPERATURE CONTROLLED VALVE |
Family Cites Families (4)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
FR724765A (en) * | 1931-10-13 | 1932-05-02 | Electrically operated valves upgrades | |
DE1166006B (en) * | 1960-05-04 | 1964-03-19 | Danfoss Ved Ing M Clausen | Servomotor with positioning movement by supplying or removing heat |
DE2133812A1 (en) * | 1971-07-07 | 1973-01-25 | Fricke Gerhard | ARRANGEMENT FOR ELECTRICAL EFFECT ON ACTUATORS OR THE SAME |
DE2749252C3 (en) * | 1977-11-03 | 1980-09-11 | Danfoss A/S, Nordborg (Daenemark) | Actuating device for adjusting the closing piece of a valve |
-
1982
- 1982-02-10 GB GB08203813A patent/GB2114741A/en not_active Withdrawn
-
1983
- 1983-02-08 DK DK52283A patent/DK52283A/en not_active Application Discontinuation
- 1983-02-09 FR FR8302063A patent/FR2521319A1/en active Pending
- 1983-02-10 JP JP58021372A patent/JPS58149407A/en active Pending
- 1983-02-10 IT IT19524/83A patent/IT1161616B/en active
- 1983-02-10 DE DE19833304585 patent/DE3304585A1/en not_active Withdrawn
Cited By (9)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US4711270A (en) * | 1986-01-27 | 1987-12-08 | Eltek S.P.A. | Thermoelectric valve for channeling refrigerant gases into different tubes in refrigeration devices |
GB2198213A (en) * | 1986-11-24 | 1988-06-08 | Peter Robert Durdin | Improvements in or relating to fluid regulating valves |
US5177969A (en) * | 1989-09-05 | 1993-01-12 | Schneider Edward T | Thermochemical actuation method and apparatus |
WO1992017703A1 (en) * | 1991-04-08 | 1992-10-15 | Schneider Edward T | High force thermochemical actuator |
GB2301667A (en) * | 1995-06-03 | 1996-12-11 | Patrick Gerard Graham | Thermostatic valve control |
EP1136227A2 (en) * | 2000-03-15 | 2001-09-26 | XENON Technologie- und Qualitätsberatung GmbH | Actuating device for adjusting die lips in extrusion molding |
EP1136227A3 (en) * | 2000-03-15 | 2004-05-12 | Emo Extrusion Molding GesmbH | Actuating device for adjusting die lips in extrusion molding |
CN114087420A (en) * | 2021-11-17 | 2022-02-25 | 济南新材料产业技术研究院 | Sealing structure of valve rod and valve |
CN114087420B (en) * | 2021-11-17 | 2024-01-26 | 济南新材料产业技术研究院 | Sealing structure of valve rod and valve |
Also Published As
Publication number | Publication date |
---|---|
DK52283D0 (en) | 1983-02-08 |
IT1161616B (en) | 1987-03-18 |
IT8319524A0 (en) | 1983-02-10 |
DK52283A (en) | 1983-08-11 |
DE3304585A1 (en) | 1983-08-18 |
JPS58149407A (en) | 1983-09-05 |
FR2521319A1 (en) | 1983-08-12 |
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Legal Events
Date | Code | Title | Description |
---|---|---|---|
WAP | Application withdrawn, taken to be withdrawn or refused ** after publication under section 16(1) |