GB266858A - Improvements in self-closing valves - Google Patents
Improvements in self-closing valvesInfo
- Publication number
- GB266858A GB266858A GB66726A GB66726A GB266858A GB 266858 A GB266858 A GB 266858A GB 66726 A GB66726 A GB 66726A GB 66726 A GB66726 A GB 66726A GB 266858 A GB266858 A GB 266858A
- Authority
- GB
- United Kingdom
- Prior art keywords
- conduit
- tubes
- tube
- withdrawn
- chamber
- 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
- F16K17/00—Safety valves; Equalising valves, e.g. pressure relief valves
- F16K17/20—Excess-flow valves
- F16K17/22—Excess-flow valves actuated by the difference of pressure between two places in the flow line
- F16K17/24—Excess-flow valves actuated by the difference of pressure between two places in the flow line acting directly on the cutting-off member
- F16K17/26—Excess-flow valves actuated by the difference of pressure between two places in the flow line acting directly on the cutting-off member operating in either direction
Landscapes
- Engineering & Computer Science (AREA)
- General Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Control Of Fluid Pressure (AREA)
- Fluid-Driven Valves (AREA)
Abstract
266,858. Blakeborough, R. A., Brotherton, C., Broadhead, J. B., and Edwards, G. T. Jan. 9, 1926. Valves controlled by pilot or relay valves. - A valve device adapted to close automatically with abnormal flow in either direction is controlled by the pressure or pressures derived from one or more Pitot tubes arranged in the main conduit but adapted to be withdrawn clear of the bore to permit the passage of a scraper. The main valve comprises a sluice valve with an eye to complete the conduit when the valve is in the open position, and is actuated by a double acting piston controlled by a four-way cock. The cock spindle c has a resetting handle j and a weighted arm c<3> adapted to rotate the cock and reverse the connections to the actuating cylinder when a projection c<4> on the lever normally engaged by a catch d<1> is withdrawn. The catch d<1> is formed on a weighted lever d having an arm e bearing on a diaphragm f. The chamber h beneath the diaphragm is connected to a Pitot tube pointing up stream while the chamber i above the diaphragm is connected to a corresponding tube pointing down stream. The Pitot tubes may be fitted with valves or connected to chambers provided with valves so that the chamber i is always connected to the downstream tube and the chamber i to the upstream tube whichever direction the fluid is flowing in the main conduit. The tubes enter the conduit through a member rand are adapted to be withdrawn into a housing s to leave the main conduit unobstructed. The tubes may carry a curved plate u to complete the conduit when these are withdrawn. The housing may be fitted with a shut-off valve t and carry a thumb screw v adapted to engage a slotted plate v<1> to hold the tubes in their raised position. A single Pitot tube with the orifice pointing either upstream or downstream may replace the double Pitot tube.
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
GB66726A GB266858A (en) | 1926-01-09 | 1926-01-09 | Improvements in self-closing valves |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
GB66726A GB266858A (en) | 1926-01-09 | 1926-01-09 | Improvements in self-closing valves |
Publications (1)
Publication Number | Publication Date |
---|---|
GB266858A true GB266858A (en) | 1927-03-10 |
Family
ID=9708401
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
GB66726A Expired GB266858A (en) | 1926-01-09 | 1926-01-09 | Improvements in self-closing valves |
Country Status (1)
Country | Link |
---|---|
GB (1) | GB266858A (en) |
-
1926
- 1926-01-09 GB GB66726A patent/GB266858A/en not_active Expired
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