ES479646A1 - Force limiting device for an actuator rod - Google Patents
Force limiting device for an actuator rodInfo
- Publication number
- ES479646A1 ES479646A1 ES479646A ES479646A ES479646A1 ES 479646 A1 ES479646 A1 ES 479646A1 ES 479646 A ES479646 A ES 479646A ES 479646 A ES479646 A ES 479646A ES 479646 A1 ES479646 A1 ES 479646A1
- Authority
- ES
- Spain
- Prior art keywords
- piston
- actuator rod
- force
- hydraulic fluid
- valve
- 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
- 239000012530 fluid Substances 0.000 abstract 4
Classifications
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F15—FLUID-PRESSURE ACTUATORS; HYDRAULICS OR PNEUMATICS IN GENERAL
- F15B—SYSTEMS ACTING BY MEANS OF FLUIDS IN GENERAL; FLUID-PRESSURE ACTUATORS, e.g. SERVOMOTORS; DETAILS OF FLUID-PRESSURE SYSTEMS, NOT OTHERWISE PROVIDED FOR
- F15B15/00—Fluid-actuated devices for displacing a member from one position to another; Gearing associated therewith
- F15B15/08—Characterised by the construction of the motor unit
- F15B15/14—Characterised by the construction of the motor unit of the straight-cylinder type
- F15B15/1423—Component parts; Constructional details
- F15B15/1447—Pistons; Piston to piston rod assemblies
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F15—FLUID-PRESSURE ACTUATORS; HYDRAULICS OR PNEUMATICS IN GENERAL
- F15B—SYSTEMS ACTING BY MEANS OF FLUIDS IN GENERAL; FLUID-PRESSURE ACTUATORS, e.g. SERVOMOTORS; DETAILS OF FLUID-PRESSURE SYSTEMS, NOT OTHERWISE PROVIDED FOR
- F15B15/00—Fluid-actuated devices for displacing a member from one position to another; Gearing associated therewith
- F15B15/08—Characterised by the construction of the motor unit
- F15B15/14—Characterised by the construction of the motor unit of the straight-cylinder type
- F15B15/149—Fluid interconnections, e.g. fluid connectors, passages
-
- 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
- F16K31/122—Actuating devices; Operating means; Releasing devices actuated by fluid the fluid acting on a piston
-
- 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
- F16K47/00—Means in valves for absorbing fluid energy
Landscapes
- Engineering & Computer Science (AREA)
- General Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Physics & Mathematics (AREA)
- Fluid Mechanics (AREA)
- Actuator (AREA)
- Fluid-Driven Valves (AREA)
- Supply Devices, Intensifiers, Converters, And Telemotors (AREA)
- Mechanically-Actuated Valves (AREA)
Abstract
In a force limiting device for an actuator rod having a valve actuator rod 76 coupled to a piston 66 slidable in a cylinder 64, one side of the piston being loaded by high pressure gas in a chamber 46 and the other side of the piston supplied with or exhausted of hydraulic fluid, the force applied to the actuator rod 76 when the valve has been moved by the hydraulic fluid from its closed position to an open stop position is arranged to be less than the initial valve opening force. The piston includes an interior cylindrical bore 70 which slidably receives a piston head 82 integral with the actuator rod 76. Atmospheric pressure communicates with the bore 70 through a passage 98 to act on the larger side 106 of the piston head, the smaller side 84 being in communication with the cylinder 64 through a clearance space around the rod 76. During valve opening the hydraulic fluid produces a force on the piston head 82 due to the pressure acting on the large area of the piston 66 but when the piston 66 forcibly abuts a piston stop 110 the hydraulic fluid becomes effective primarily only on the smaller piston head side 84 thereby limiting the maximum tensile force on the actuator rod when the valve reaches its fully open stop position.
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
US89723878A | 1978-04-17 | 1978-04-17 |
Publications (1)
Publication Number | Publication Date |
---|---|
ES479646A1 true ES479646A1 (en) | 1980-01-01 |
Family
ID=25407597
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
ES479646A Expired ES479646A1 (en) | 1978-04-17 | 1979-04-17 | Force limiting device for an actuator rod |
Country Status (12)
Country | Link |
---|---|
JP (1) | JPS54140220A (en) |
AU (1) | AU538319B2 (en) |
BE (1) | BE875611A (en) |
CA (1) | CA1104467A (en) |
CH (1) | CH642728A5 (en) |
DE (1) | DE2915505A1 (en) |
ES (1) | ES479646A1 (en) |
FR (1) | FR2423703B1 (en) |
GB (1) | GB2018895B (en) |
IT (1) | IT1119723B (en) |
NL (1) | NL7902821A (en) |
SE (1) | SE440128B (en) |
Families Citing this family (4)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US4568058A (en) * | 1985-07-01 | 1986-02-04 | Joy Manufacturing Company | Dual stage hydraulic actuator for expanding gate valve |
US4585207A (en) * | 1985-09-03 | 1986-04-29 | Joy Manufacturing Company | Expanding gate valve with pneumatic actuator |
CN108980144B (en) * | 2018-08-07 | 2020-03-17 | 浙江赛渤电力科技有限公司 | Cylinder of splash-proof effect |
CN112695724B (en) * | 2020-12-14 | 2022-06-10 | 国网福建省电力有限公司 | Hydraulic supporting mechanism of ship lift |
Family Cites Families (4)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
FR971370A (en) * | 1940-04-16 | 1951-01-16 | Installation for remote control of a gate valve using pressurized fluid | |
US2329044A (en) * | 1941-08-13 | 1943-09-07 | Hugo C Gollmer | Dual cylinder |
US2478811A (en) * | 1947-05-19 | 1949-08-09 | W K M Company Inc | Power-operated gate valve |
FR2302430A1 (en) * | 1975-02-26 | 1976-09-24 | Milhyroux Sarl Ets R | Multiple position linear actuator - has cylinder housing intermediate hollow piston in turn housing independent piston |
-
1979
- 1979-03-29 AU AU45586/79A patent/AU538319B2/en not_active Ceased
- 1979-03-29 CA CA324,446A patent/CA1104467A/en not_active Expired
- 1979-04-04 GB GB7911862A patent/GB2018895B/en not_active Expired
- 1979-04-10 NL NL7902821A patent/NL7902821A/en not_active Application Discontinuation
- 1979-04-11 SE SE7903242A patent/SE440128B/en not_active IP Right Cessation
- 1979-04-13 IT IT21836/79A patent/IT1119723B/en active
- 1979-04-16 JP JP4656579A patent/JPS54140220A/en active Granted
- 1979-04-17 CH CH359679A patent/CH642728A5/en not_active IP Right Cessation
- 1979-04-17 DE DE19792915505 patent/DE2915505A1/en active Granted
- 1979-04-17 BE BE2/57735A patent/BE875611A/en not_active IP Right Cessation
- 1979-04-17 FR FR7909603A patent/FR2423703B1/fr not_active Expired
- 1979-04-17 ES ES479646A patent/ES479646A1/en not_active Expired
Also Published As
Publication number | Publication date |
---|---|
CA1104467A (en) | 1981-07-07 |
DE2915505C2 (en) | 1990-01-04 |
AU538319B2 (en) | 1984-08-09 |
GB2018895A (en) | 1979-10-24 |
AU4558679A (en) | 1979-10-25 |
GB2018895B (en) | 1982-09-15 |
CH642728A5 (en) | 1984-04-30 |
DE2915505A1 (en) | 1979-10-25 |
BE875611A (en) | 1979-08-16 |
IT1119723B (en) | 1986-03-10 |
JPS54140220A (en) | 1979-10-31 |
FR2423703A1 (en) | 1979-11-16 |
SE440128B (en) | 1985-07-15 |
FR2423703B1 (en) | 1984-03-23 |
SE7903242L (en) | 1979-10-18 |
IT7921836A0 (en) | 1979-04-13 |
JPS6134583B2 (en) | 1986-08-08 |
NL7902821A (en) | 1979-10-19 |
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