US3889466A - Device for maintaining a working fluid under a predetermined pressure - Google Patents
Device for maintaining a working fluid under a predetermined pressure Download PDFInfo
- Publication number
- US3889466A US3889466A US356435A US35643573A US3889466A US 3889466 A US3889466 A US 3889466A US 356435 A US356435 A US 356435A US 35643573 A US35643573 A US 35643573A US 3889466 A US3889466 A US 3889466A
- Authority
- US
- United States
- Prior art keywords
- jacks
- elements
- quadrilateral
- jack
- assembly
- 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 - Lifetime
Links
- 239000012530 fluid Substances 0.000 title claims abstract description 59
- 238000004891 communication Methods 0.000 claims description 3
- 230000006854 communication Effects 0.000 claims description 3
- 238000006073 displacement reaction Methods 0.000 claims description 2
- 230000001105 regulatory effect Effects 0.000 description 3
- 238000010276 construction Methods 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- VYMDGNCVAMGZFE-UHFFFAOYSA-N phenylbutazonum Chemical compound O=C1C(CCCC)C(=O)N(C=2C=CC=CC=2)N1C1=CC=CC=C1 VYMDGNCVAMGZFE-UHFFFAOYSA-N 0.000 description 1
Images
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
- F15B21/00—Common features of fluid actuator systems; Fluid-pressure actuator systems or details thereof, not covered by any other group of this subclass
-
- E—FIXED CONSTRUCTIONS
- E21—EARTH OR ROCK DRILLING; MINING
- E21B—EARTH OR ROCK DRILLING; OBTAINING OIL, GAS, WATER, SOLUBLE OR MELTABLE MATERIALS OR A SLURRY OF MINERALS FROM WELLS
- E21B19/00—Handling rods, casings, tubes or the like outside the borehole, e.g. in the derrick; Apparatus for feeding the rods or cables
- E21B19/08—Apparatus for feeding the rods or cables; Apparatus for increasing or decreasing the pressure on the drilling tool; Apparatus for counterbalancing the weight of the rods
- E21B19/09—Apparatus for feeding the rods or cables; Apparatus for increasing or decreasing the pressure on the drilling tool; Apparatus for counterbalancing the weight of the rods specially adapted for drilling underwater formations from a floating support using heave compensators supporting the drill string
-
- 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
- F15B1/00—Installations or systems with accumulators; Supply reservoir or sump assemblies
- F15B1/02—Installations or systems with accumulators
-
- 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
- F15B3/00—Intensifiers or fluid-pressure converters, e.g. pressure exchangers; Conveying pressure from one fluid system to another, without contact between the fluids
Definitions
- ABSTRACT A device for maintaining in a delivery pipe a working fluid under a determined pressure, using a source of pressurized auxiliary fluid communicating with a chamber of variable volume, in which the pressure of the auxiliary fluid varies in an inverse proportion with respect to the volume of the chamber.
- This device comprises an assembly of at least two jacks and at least one connecting rod articulated separately on first constituting elements of a first and a second jack of the assembly.
- the cylinder of the first jack is connected to the source of pressurized fluid and forms the chamber of variable volume and the cylinder of the second jack supplies the working fluid to the delivery pipe.
- the invention relates to a device for maintaining a working fluid under a predetermined pressure.
- This device is used in combination with a source of pressurized fluid and includes a chamber of variable volume, such as the cylinder of a jack in which the fluid pressure varies in inverse proportion with respect to the volume of the chamber.
- a chamber of variable volume such as the cylinder of a jack in which the fluid pressure varies in inverse proportion with respect to the volume of the chamber.
- Pressure regulating devices comprise at least one jack pivotally mounted about one stationary point of its constituting elements (i.e., the cylinder and the piston with its rod), one point of the other constituting element of the jack being moveable along a determined path, with respect to which the jack remains inclined when pivoting about said stationary point.
- the piston of this jack is subjected to the pressure of a fluid supplied from a source of pressurized fluid and the jack exerts in turn a pressure on a working fluid whose actual pressure is thus a function both of the pressure of the fluid in said source and of the cosine of the inclination angle of the axis of the pivoting jack with respect to said determined path.
- the present invention provides a new device for maintaining a working fluid under a substantially determined pressure by applying to the pressure variations of a fluid supplied by a source of pressurized fluid of the above-considered type, a corrective factor which is no longer a function of the cosine of a variable angle, but depends on the ratio of trigonometric functions of variable angles, which ratio varies in a broader interval.
- the device according to the invention maintains in a pipe a working fluid at a determined pressure, by using a source of pressurized auxiliary fluid in communica tion with a chamber of variable volume, the pressure of the auxiliary fluid varying in inverse proportion with respect to the volume of the chamber.
- This device cornprises an assembly of at least two jacks and at least one connecting rod articulated separately with a first constituting element of each of a first and a second jacks of said assembly, the cylinder of a flrst jack of said assembly forming said chamber of variable volume and the cylinder of a second jack of said assembly supplying said pipe with working fluid.
- FIG. 1 illustrates a first embodiment of the invention comprising two jacks and a connecting rod forming a triangular system
- FIG. 2 illustrates a second embodiment of the invention. comprising two jacks and an assembly of connecting rods forming a quadrilateral system
- FIG. 3 shows a specific embodiment of the device illustrated by FIG. 2;
- FIG. 4 shows an alternative embodiment of the device illustrated by FIG. 3;
- FIG. 5 is a graph indicating, for different positions of the device according to FIG. 4, the pressure exerted by the accumulator and the pressure applied to the working fluid plotted versus the stroke of the jack.
- the source I of fluid under pressure consists of an air-oil accumulator housing a bag 2 of pressurized gas.
- the device according to the invention comprises two regulating jacks 3 and 4 whose axes form an angle therebetween.
- the cylinders of the jacks are, for instance, stationary and a rigid connecting rod 5, of a determined length, connects to each other the piston rods of the jacks, said connecting rod 5 being articulated with these piston rods.
- the jacks 3 and 4 and the connecting rod 5 form a deformable triangular system in which the connecting rod 5 is inclined on the jack 3 by a variable angle 7 and on the jack 4 by a variable angle B, the third angle of the triangle, opposite the connecting rod 5, being a.
- the cylinder of the jack 3 is connected to the accumulator 1 through pipe 16 and the cylinder of the jack 4 contains a hydraulic working fluid which is delivered to pipe 17 under a pressure:
- S being the area of the piston ofjack 3, s the area of the piston of jack 4, 7,6 and or having the above-indicated meanings and P being the pressure prevailing in the accumulator l for the considered values of the angles 7 and B.
- the connecting rod 5 may be stationary and the cylinders of jacks 3 and 4 articulated about one and the same moveable articulation point.
- the device illustrated by FIG. 2 comprises two regulation jacks 3 and 4, whose axes extend along the diagonals of a deformable quadrilateral formed by four connecting rods 10, ll, 12 and 13 of determined lengths, articulated to each other at points 6, 7, 8 and 9.
- One element (for example the cylinder) of the jack 3 is articulated at 8 and the other element (the piston rod) at 6.
- One element (for example the cylinder) of the jack 4 is articulated at 9 and the other element (i.e., the piston rod) at 7.
- the axis of jack 3 and its articulation point are stationary, the articulation point 6 being moveable along the diagonal 6-8 of the quadrilateral.
- the jack 3 is connected to the air-oil accumulator I through a pipe 16 and the jack 4 supplies pipe 17 with hydraulic working fluid.
- the connecting rods form a parallelogram and the pressure P of the hydraulic fluid supplied by the jack 4 is:
- P, P S/s sin y'lsin B' P S/s sin ylsin B y and 7 being the angles formed respectively between the jack connected to the accumulator and the adjacent connecting rods of the parallelogram, ,B and B being respectively the angles between the jack supplying the working fluid at pressure P, and the adjacent connecting rods, S being the area of the piston of jack 3, s the area of the piston of jack 4 and P the pressure in the accumulator for the considered values of the angles y and B or 'y' and B.
- the connecting rods may form a deformable quadrilateral of the concave or convex type or with intercrossing sides.
- One of the jacks for example jack 3, may have one stationary articulation (articulation 8), while the other articulation is displaceable along a determined path, which is different from the direction defined by a diagonal of the quadrilateral.
- FIGS. 3 and 4 comprise two regulation jacks 3 and 4 whose elements (pis ton rods and cylinders) are coupled through connecting rods l0, l1, l2 and 13, articulated at 6, 7, 8 and 9 at the apices of a quadrilateral having perpendicular diagonals, this quadrilateral being a rhomb in the two illustrated embodiments.
- One articulation point of one jack for example point 8 of jack 3 is stationary while the other articulation point is displaceable along a diagonal of the quadrilateral (following the arrows).
- One cylinder of a jack for example jack 3, is connected to the accumulator through pipe 16 while the other supplies pipe 17 with hydraulic working fluid whose pressure is substantially:
- the regulating device has, in this particular embodiment. the shape of a rhomb and S/s l (i.e., the cross sectional area of jacks 3 and 4 have been chosen equal).
- FIG. 5 also shows the curve of variation of the pressure P, of the working fluid in response to the stroke C of jack 3, this curve being very different from the curve representing the variation of P.
- the angle 6/2 varies from 386/l0 to 674/10, in order to obtain two equal values of the pressure P, for the limit positions of the jacks.
- a device for maintaining a working fluid in a pipe under a determined pressure making use of a source of pressurized auxiliary fluid in communication with a chamber of variable volume, in which the pressure of the auxiliary fluid varies in inverse proportion with respect to the volume of the chamber, said said comprising an assembly of at least two jacks, each of said two jacks being disposed at an angle with respect to one another, and each of said two jacks comprising two elements, said two elements including a cylinder and a piston rod; and at least one rigid connecting rod joining at least respective first elements of said two elements of each of fsaid two jacks of said assembly, the cylinder of a first jack of said two jacks of said assembly being connected to the source of pressurized auxiliary fluid and forming the chamber of variable volume, and the cylinder of a second jack of said two jacks of said assembly supplying a pipe with working fluid.
- a device wherein the second element of said two elements of said two jacks is stationary.
- a device comprising two jacks, wherein said angle constitutes a triangular system with said connecting rod, said triangular system being deformable by displacement of said first elements of said two jacks with respect to said second elements thereof.
- a device comprising two jacks and four connecting rods joined two by two, said connecting rods forming a quadrilateral, said first and second elements of said two jacks being respectively joined at the apices of this quadrilateral, and said two jacks having axes extending along the diagonals of said quadrilateral.
- one of said two jacks has a stationary joint, and a second joint displaceable along a predetermined path.
- a device in which one of said first and second elements of one jack of said two jacks is kept stationary.
- a device in which the quadrilateral is a parallelogram.
- connecting rods constitute a quadrilateral having intercrossing sides.
- a device in which the jacks of said assembly are perpendicular to each other.
- a device wherein said at least one connecting rod is pivotally joined to said first elements of each of said two jacks.
- each of said first elements of said two jacks forms a respective variable angle with said at least one rigid connecting rod, and said working fluid is maintained at the determined pressure which is a function of both the pressure of said pressurized auxiliary fluid and a ratio of trigonometric functions of at least one of said respective variable angles.
- said determined pressure of said working fluid is a function of a ratio of trigonometric functions of each of said respective variable angles.
- said source of pressurized auxiliary fluid includes a gas-fluid accumulator containing a source of pressurized gas having a variable volume.
Landscapes
- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Physics & Mathematics (AREA)
- Fluid Mechanics (AREA)
- General Engineering & Computer Science (AREA)
- Life Sciences & Earth Sciences (AREA)
- Geology (AREA)
- Mining & Mineral Resources (AREA)
- Environmental & Geological Engineering (AREA)
- Geochemistry & Mineralogy (AREA)
- Chemical & Material Sciences (AREA)
- Analytical Chemistry (AREA)
- General Life Sciences & Earth Sciences (AREA)
- Fluid-Pressure Circuits (AREA)
- Control Of Fluid Pressure (AREA)
- Placing Or Removing Of Piles Or Sheet Piles, Or Accessories Thereof (AREA)
- Shaping Metal By Deep-Drawing, Or The Like (AREA)
- Hydraulic Turbines (AREA)
- Food Preservation Except Freezing, Refrigeration, And Drying (AREA)
Applications Claiming Priority (3)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
FR7216071A FR2183383A5 (nl) | 1972-05-05 | 1972-05-05 | |
FR7222953A FR2190290A5 (nl) | 1972-06-23 | 1972-06-23 | |
FR7222954A FR2200986A6 (nl) | 1972-05-05 | 1972-06-23 |
Publications (1)
Publication Number | Publication Date |
---|---|
US3889466A true US3889466A (en) | 1975-06-17 |
Family
ID=27249852
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
US356435A Expired - Lifetime US3889466A (en) | 1972-05-05 | 1973-05-02 | Device for maintaining a working fluid under a predetermined pressure |
Country Status (10)
Country | Link |
---|---|
US (1) | US3889466A (nl) |
JP (1) | JPS4954783A (nl) |
CA (1) | CA983352A (nl) |
DE (1) | DE2322284A1 (nl) |
ES (1) | ES414434A1 (nl) |
GB (1) | GB1393192A (nl) |
IT (1) | IT987257B (nl) |
NL (1) | NL164644C (nl) |
NO (1) | NO138223C (nl) |
SE (1) | SE397123B (nl) |
Cited By (6)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US3978784A (en) * | 1974-11-11 | 1976-09-07 | Dominion Engineering Works, Limited | Calendar control system |
US5111659A (en) * | 1987-10-17 | 1992-05-12 | Alfred Teves Gmbh | Device for adapting the characteristic curve of a hydraulic accumulator to the characteristic curve of a consumer |
US20110298181A1 (en) * | 2005-08-19 | 2011-12-08 | Thomas Wright | Multifunction Target Actuator |
US20130110417A1 (en) * | 2011-10-28 | 2013-05-02 | John A. Balogh | Pipeline Hydrostatic Testing Device |
US8684361B2 (en) | 2011-01-17 | 2014-04-01 | Action Target Inc. | Target system |
US10876821B2 (en) | 2017-01-13 | 2020-12-29 | Action Target Inc. | Software and sensor system for controlling range equipment |
Families Citing this family (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
AT408023B (de) * | 1999-05-06 | 2001-08-27 | Tcg Unitech Ag | Vorrichtung zur umwandlung von pneumatischer energie in hydraulische energie |
FR3020840B1 (fr) * | 2014-05-12 | 2017-03-03 | Vianney Rabhi | Detendeur de fin de course pour convertisseur de pression a pistons |
Citations (4)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US1890041A (en) * | 1931-10-28 | 1932-12-06 | Mcleod Thomas | Steering apparatus or the like |
US2668450A (en) * | 1950-11-01 | 1954-02-09 | Standard Oil Dev Co | Device for giving angular motion when shifting jaw clutches |
US2922399A (en) * | 1957-01-24 | 1960-01-26 | Ibm | Hydraulic drive and control therefor |
US3550376A (en) * | 1969-01-22 | 1970-12-29 | Tolaca C A Altamira Distrito S | Safety valve for divided space |
-
1973
- 1973-05-02 US US356435A patent/US3889466A/en not_active Expired - Lifetime
- 1973-05-03 GB GB2108873A patent/GB1393192A/en not_active Expired
- 1973-05-03 DE DE2322284A patent/DE2322284A1/de active Pending
- 1973-05-03 NO NO1831/73A patent/NO138223C/no unknown
- 1973-05-03 NL NL7306186.A patent/NL164644C/nl not_active IP Right Cessation
- 1973-05-04 CA CA170,404A patent/CA983352A/en not_active Expired
- 1973-05-04 SE SE7306270A patent/SE397123B/xx unknown
- 1973-05-04 ES ES414434A patent/ES414434A1/es not_active Expired
- 1973-05-04 IT IT23709/73A patent/IT987257B/it active
- 1973-05-07 JP JP48050557A patent/JPS4954783A/ja active Pending
Patent Citations (4)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US1890041A (en) * | 1931-10-28 | 1932-12-06 | Mcleod Thomas | Steering apparatus or the like |
US2668450A (en) * | 1950-11-01 | 1954-02-09 | Standard Oil Dev Co | Device for giving angular motion when shifting jaw clutches |
US2922399A (en) * | 1957-01-24 | 1960-01-26 | Ibm | Hydraulic drive and control therefor |
US3550376A (en) * | 1969-01-22 | 1970-12-29 | Tolaca C A Altamira Distrito S | Safety valve for divided space |
Cited By (8)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US3978784A (en) * | 1974-11-11 | 1976-09-07 | Dominion Engineering Works, Limited | Calendar control system |
US5111659A (en) * | 1987-10-17 | 1992-05-12 | Alfred Teves Gmbh | Device for adapting the characteristic curve of a hydraulic accumulator to the characteristic curve of a consumer |
US20110298181A1 (en) * | 2005-08-19 | 2011-12-08 | Thomas Wright | Multifunction Target Actuator |
US8684361B2 (en) | 2011-01-17 | 2014-04-01 | Action Target Inc. | Target system |
US20130110417A1 (en) * | 2011-10-28 | 2013-05-02 | John A. Balogh | Pipeline Hydrostatic Testing Device |
US8935106B2 (en) * | 2011-10-28 | 2015-01-13 | Adalet/Scott Fetzer Company | Pipeline hydrostatic testing device |
US10876821B2 (en) | 2017-01-13 | 2020-12-29 | Action Target Inc. | Software and sensor system for controlling range equipment |
US11585642B2 (en) | 2017-01-13 | 2023-02-21 | Action Target Inc. | Software and sensor system for controlling range equipment |
Also Published As
Publication number | Publication date |
---|---|
ES414434A1 (es) | 1976-06-01 |
SE397123B (sv) | 1977-10-17 |
GB1393192A (en) | 1975-05-07 |
CA983352A (en) | 1976-02-10 |
DE2322284A1 (de) | 1973-11-22 |
IT987257B (it) | 1975-02-20 |
NL164644B (nl) | 1980-08-15 |
NO138223C (no) | 1978-07-26 |
NL7306186A (nl) | 1973-11-07 |
JPS4954783A (nl) | 1974-05-28 |
NL164644C (nl) | 1981-01-15 |
NO138223B (no) | 1978-04-17 |
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