EP1218287A1 - Bras articule de transfert de produits fluides a equilibrage par ressort dans un grand debattement - Google Patents
Bras articule de transfert de produits fluides a equilibrage par ressort dans un grand debattementInfo
- Publication number
- EP1218287A1 EP1218287A1 EP00949534A EP00949534A EP1218287A1 EP 1218287 A1 EP1218287 A1 EP 1218287A1 EP 00949534 A EP00949534 A EP 00949534A EP 00949534 A EP00949534 A EP 00949534A EP 1218287 A1 EP1218287 A1 EP 1218287A1
- Authority
- EP
- European Patent Office
- Prior art keywords
- spring
- section
- axis
- balancing device
- movable
- 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
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B67—OPENING, CLOSING OR CLEANING BOTTLES, JARS OR SIMILAR CONTAINERS; LIQUID HANDLING
- B67D—DISPENSING, DELIVERING OR TRANSFERRING LIQUIDS, NOT OTHERWISE PROVIDED FOR
- B67D7/00—Apparatus or devices for transferring liquids from bulk storage containers or reservoirs into vehicles or into portable containers, e.g. for retail sale purposes
- B67D7/002—Apparatus or devices for transferring liquids from bulk storage containers or reservoirs into vehicles or into portable containers, e.g. for retail sale purposes using articulated pipes
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B67—OPENING, CLOSING OR CLEANING BOTTLES, JARS OR SIMILAR CONTAINERS; LIQUID HANDLING
- B67D—DISPENSING, DELIVERING OR TRANSFERRING LIQUIDS, NOT OTHERWISE PROVIDED FOR
- B67D9/00—Apparatus or devices for transferring liquids when loading or unloading ships
- B67D9/02—Apparatus or devices for transferring liquids when loading or unloading ships using articulated pipes
Definitions
- the invention relates to the transfer of fluid, liquid or gaseous products between a base and a mobile tank, for example a tank on board a truck or on a railway wagon.
- These fluid products can be of very varied types, for example but not limited to petroleum products, such as gasoline or liquefied petroleum gas (LPG) in particular, or chemicals, acids or solvents in particular.
- LPG liquefied petroleum gas
- these fluid products are mainly liquid, but are generally in equilibrium with a gas phase, so that, rather than speaking of liquid products, it is more accurate to speak of fluid products; sometimes it is necessary to transfer these two liquid and gaseous phases separately.
- Fluid product transfer devices often called transfer arms or loading / unloading arms, are thus of two possible types: either they have a flexible part, which poses possible problems of resistance to aging, or they are made up of a succession of at least two tubular sections articulated to one another.
- the fluids transfer arms must therefore, in practice, be brought into an appropriate configuration, when preparing a transfer operation, so as to bring a free end of this arm (the other end being generally connected permanently at the base) opposite the connection flange of the tank concerned.
- This operation is generally carried out by an operator, and it is desirable that this one is not obliged to deploy too great efforts.
- a motorized control of a liquid product transfer arm which avoids any effort on the part of the operators, is however difficult to implement, given the difficulty of bringing the end, automatically free of the arm facing precisely the connection flange; this supposes a great mastery of the automaton controlling the configuration of the arm, and therefore possibly long and costly training of the operator. In any event, such a motorized control involves significant costs
- a first category of balancing device uses one or several counterweights which are fixed opposite the arm part to be balanced. This solution, quite effective, is nevertheless cumbersome in practice.
- balancing device involves springs, for example steel torsion springs, most often in a cylindrical helix, attached to the rotary joint or inside it; it can also be torsion springs in steel in Archimedes spiral or in hyperbolic spiral.
- springs for example steel torsion springs, most often in a cylindrical helix, attached to the rotary joint or inside it; it can also be torsion springs in steel in Archimedes spiral or in hyperbolic spiral.
- balancing device uses a steel compression spring, often located along the part of the arm to be balanced or in a device called balancing box or spring box, fixed on the part of arm to be balanced.
- Yet another category of balancing device uses steel tension springs often also located along the arm.
- balancing device uses cylinders, for example nitrogen, pneumatic, hydraulic, or electric.
- an articulated arm for transferring fluid, liquid or gaseous products comprising: two tubular sections connected to one another by a rotary joint with a horizontal axis, and one of which, movable in rotation around this horizontal axis has an angular reference configuration in which it is in balance despite gravity; and a balancing device to compensate for variations in the effect of gravity on this movable tubular section as a function of the orientation thereof with respect to the vertical, characterized in that this balancing device is mounted between a reference portion fixed relative to the axis of rotation of the rotary joint and a connecting portion of the movable tubular section which is at a non-zero constant distance from the axis of rotation, and comprises a spring tending to bring back the movable section in its angular reference configuration, this spring being designed and mounted so as to apply to the movable tubular section, directly or indirectly, a force substantially proportional and substantially parallel to the distance between
- the other section is of fixed orientation relative to the axis of the rotary joint (it is frequent in practice that this is the section connected to the fixed base), and the fixed portion of reference to which the balancing device is connected at one of its ends is integral with this fixed section
- the balancing device is connected to this fixed portion of reference and to the connecting portion of the movable section by articulations of horizontal axes which, when the balancing device is not flexible, minimizes the parasitic torques around the axis of rotation of the rotary joint
- Another case is interesting , in which there is a single articulation, for example between the spring and the movable section, and a rigid connection
- the fixed reference portion is substantially disposed facing, parallel to the axis of rotation, of the location at which the connecting portion of the movable tubular section comes, when the latter is in its configuration. This contributes to approaching a very good linearity of the spring as a function of the angular amplitude of rotation of the section to be balanced. In fact, during the rotation of the tubular section to be balanced, the distance to the axis (lever arm) of the force. of return applied by the spring varies in the same way as the distance to the axis of the weight.
- the balancing device has the form of a loop, situated in a plane substantially perpendicular to the axis of rotation and elastically deformable in this plane, and at two ends which are, in the rest configuration of this spring, one close to the other This contributes to combining r I advantage of the above-mentioned good linearity with a small footprint
- the spring comprises a U-shaped part forming a spring, elastically flexible in the plane of the loop, and having two branches connected by a curved portion; and two attachment tabs extending these branches to the ends of this balancing device.
- the spring advantageously comprises a single loop, for reasons of simplicity, but that, if we admit a larger size parallel to the axis of rotation, we choose springs with several loops or turns (this can give a lower stiffness, when desired.
- the linearity is very good when the ends of the balancing device are opposite, parallel to the axis of rotation of the rotary joint.
- a spring having a general U-shape within a balancing device of any design.
- it may also be a device in which one of the ends of the spring is connected to the connecting portion of the movable section by a belt passing over a pulley situated, parallel to the axis of rotation , opposite the location in which the connecting portion of the movable tubular section is located when the latter is in the reference configuration.
- the spring can also be a tension compression spring situated between a portion of a cylinder with a fixed section and a piston connected to this belt and mounted in this cylinder.
- the branches of the spring are biased in one direction throughout the movement of the movable section, preferably in the direction corresponding to an approximation (sometimes called "compression" of the branch spring).
- the spring, U-shaped or not, is made of composite material
- FIG. 1 is an elevational view of an articulated arm portion for transferring fluid products according to the invention, the arm section to be balanced being horizontal;
- FIG. 2 is a top view of this articulated arm for transferring fluid products, without the spring;
- FIG. 3 is a side view of this articulated transfer arm, without the spring, the arm section to be balanced being in vertical reference configuration;
- FIG. 4 is an elevational view of the loop-shaped spring of the arm balancing device of Figures 1 to 3;
- FIG. 5 is an alternative embodiment of the loop-shaped part of Figure 5; - Figure 6 is a right view of the loop piece of Figure
- FIG. 7 is a block diagram of the arm of FIGS. 1 to 3 in the configuration where the section of arm to be balanced is vertical,
- FIG. 8 is a block diagram of this arm, in a configuration where the section to be balanced is slightly inclined upwards;
- FIG. 9 is another block diagram of this arm, in a configuration where the section of arm to be balanced is substantially inclined downward,
- FIG. 1 0 is a block diagram of an alternative embodiment of the invention, in which a pulley return transmits the return force of a spring
- FIG. 11 is an elevation view, similar to that of FIG. 1, showing a portion of an articulated transfer arm according to another embodiment, and
- FIG. 12 is an elevational view of an articulated arm according to yet another embodiment
- Figures 1 to 3 partially show a transfer arm for fluid, liquid or gaseous products, comprising a first tubular section 1 (in fixed practice, fixed to a base), a second tubular section 2, a rotary joint 3 of axis horizontal, and a balancing device 4 connects to each of the tubular sections to compensate for variations in torque (due to gravity) around the axis of the rotary joint during a relative rotation between the sections around this horizontal axis
- the first tubular section 1 is vertical and is connected to a second rotary joint 6 of vertical axis
- This second rotary joint 6 is in turn connected to the rotary joint 3 of horizontal axis by a right angle bend 7
- the second tubular section 2 is in the configuration shown in FIGS. 1 and 2 horizontal This second tubular section 2 ends at its left end by a third 90 ° elbow, item 8 which is connected to the rotary joint 3
- the second tubular section 2 can take any angular orientation (inside, of course, of a given clearance) both in azimuth and in elevation, relative to the first tubular section 1
- the elbow 7 which is connected to each of the rotary joints 3 and 6 constitutes in itself a tubular section, which is connected to the second tubular section 2 by a rotary joint of horizontal axis
- the balancing device 4 is connected to each of these tubular sections 2 and 7 It is therefore indirectly that this balancing device is connected to the tubular section 1, but, insofar as the rotary joint 6 has a vertical axis, no balancing effort is necessary to take account of variations in angular position during rotation of this rotary joint.
- This balancing device essentially consists of a spring
- 1 1 A and 12A are each connected to one, respectively, of sections 2 and 7 by attachment tabs 15 and 16.
- each of the ends 15A and 16A of these attachment tabs is articulated on its respective section, around an axis parallel to the axis of the rotary joint.
- the ends 15A and 16A of the attachment tabs in which are housed housings receiving the pins 13 and 14, are arranged I a with I other, preferably I next to I other, so that the housings are concentric
- the ends of the branches of the spring may include a plurality of housings for the reception of a member intended for its connection to the respective tubular section, for example the aforementioned pin 13 or 14
- the attachment tabs 15 and 16 are, in the example of FIG. 4, attached to the ends of the branches of the spring 10, on the internal side of the latter.
- One and / or the other of the blocks 15 and 16 can be fixed outside the spring.
- the spring marked 10 ′ (and therefore the balancing device of which it is the essential part) has the form of a loop, situated in a plane substantially perpendicular to the axis of rotation of the Turning joint.
- This loop is here formed of a single piece whose ends are arranged side by side (see Figure 6).
- the two tubular portions 7 and 8 + 2 connected via the rotary joint spotted horizontal axis 3 are each provided, on either side of this rotary joint, to pads of attachment 20 and 21 carrying trunnions 14 and 1 3 These are advantageously shaped so that the spring is substantially arranged in a plane perpendicular to the axis of the rotary joint, that is to say in a vertical plane perpendicular to the plane of Figure 2, or in a plane parallel to the plane of figure 1
- these studs can thus be made, with regard to the tab 20, of two plates 20A and 20B connected at right angles and carrying a plate 20C carrying the pin 13 as well as, advantageously, a stop 22 for the spring or its legs attachment .
- the other attachment tab 21 it consists of a collar 23 enclosing a portion of the movable tubular section 2 and carrying the pin 14
- the stud 20 can be fixed to a portion of the elbow 8 located in the immediate vicinity of the rotary joint 3.
- the spring is advantageously made of a composite material. These are, for example, glass or carbon fibers coated with resin and tooled (mold) to obtain the shape of the final U in baking.
- the spring removed from the oven goes into the finishing phase, by deburring, finishing, drilling, installation of a possible silicone finishing sheath (or other depending on market availability)
- this spring is advantageously coated with a silicone sheath capable of effectively protecting the material constituting the U-shaped part against various external aggressions.
- Figures 7 to 9 show schematically the principle of balancing a device according to the invention.
- the spring In the natural equilibrium configuration (vertical section in FIG. 7) the spring is in the rest configuration, its ends being substantially superimposed parallel to the axis of rotation at a distance therefrom.
- the branches of the spring begin to cross (it is said that the spring compresses) and a restoring force is applied by the spring, at a distance from the axis which depends on this inclination; one can however show that the variations of this distance are similar to the variations of the distance to the axis of the weight on this section 2. This property is preserved on a large range, until a configuration inclined towards the bottom of the section (see Figure 9).
- Figure 10 shows a configuration having the same properties, but in which the spring 10 (without the fastening lugs) is mounted between a fixed reference portion 100, preferably by articulation, and the end of a belt 101 , passing through a pulley 102 and connected at its other end to a point in the section 2 which comes opposite the location of the pulley 102 in the natural equilibrium configuration of this section.
- journal 14 on the section is substantially oriented so as to intercept the longitudinal axis of this section, but this location relative to the section is arbitrary, as long as the point of spring retainer (or I location of the pulley) is opposite the pin configuration of natural balance.
- the invention thus leads to a much more efficient balancing than the simple assistance provided by known devices while being simple, reliable and inexpensive.
- the balancing obtained is indeed very close to the very good balancing achieved by counterweights but which has been said previously that they led to annoying bulk during the maneuvers
- the balancing proposed by the invention does not bring any overload on the part to be balanced, by comparison with a spring box
- the weight of this spring is much less than all of the known balancing systems
- this spring cannot break when the arm falls under its own weight as it could be noted during tests, even adding to the arm heavy overloads this spring can deteriorate but not to the point to drop the load suddenly If necessary, stops can be provided to limit the approach (or even the spacing) of the branches of the spring It can be noted that throughout the movement the spring is biased in one direction (compression) of course alternatively not shown, it can only be used in traction
- the attachment of the proposed device is simple to implement and does not require any particular tool.
- the device described above has proved to be insensitive to the usual climatic temperature variations. It is also due to its design. (notably due to the composite nature of the U-shaped part) not very sensitive to ultraviolet rays. No protective paint is therefore necessary.
- the balancing device of the invention very significantly reduces the need for spare parts. It should be noted that this assembly can be used with several springs mounted in parallel, thus making it possible to obtain a moment of '' superior balancing
- Figure 1 1 partially shows a transfer arm comprising a first section 51 (in practice fixed) attached to a base, a second tubular section 52, a rotary joint 53 with a horizontal axis, and a balancing device 54
- This transfer arm is similar to that of FIGS. 1 to 3 and similar elements of this arm are designated by numbers resulting from those of FIGS. 1 to 3 by the addition of the number 50
- the first section 51 is connected to a second Turning joint
- the balancing device 54 is connected to each of the tubular sections 52 and 57 It essentially consists of a spring 60 having two branches 61 and 62 whose ends 61 A and 62A are each connected to one, respective, of the sections 52 and 57 by fastening tabs 65 and 66
- the attachment tab 66 can constitute both the attachment tabs of the spring and of the fixed section.
- the end 66A which can be rigidly linked. at its stretch The end 62A of the spring is thus locked in a predetermined orientation, which is preferably that which it would take when the spring is at rest, the movable section being in its reference configuration
- the spring 60, its fastening lug 65 and the lug 71 are shown in a working configuration.
- 1 appears in dashed lines the rest configuration of these elements, it is observed that the articulation
- Figure 12 shows another transfer arm, according to the block diagram of Figure 10, except for the structure of the spring used
- the arm has a vertical section 81 connected by a joint 86 to an elbow 87 connected, by a joint 83 with a horizontal axis, to a movable section 82
- the balancing device 84 comprises a spring system 90 connected, HERE by a rod 91, to a cable 92 passing over a deflection element 93, such as a pulley, and connects at 94 to the movable section This fixing zone
- the spring system 90 comprises a cylinder 90A, integral with the section 81 (and therefore axially fixed relative to the intermediate section 87 on which the movable section is articulated) and a piston 90B, axially movable in this cylinder a encounter of a compression spring 90C
- the rod is here integral with this piston
- FIG. 12 represents an intermediate configuration the spring is at rest in the natural equilibrium configuration of the section 82
- the cylinder is connected to this section 81 by rotary collars 81 A allowing this cylinder to follow the rotation of the section 87
- this cylinder is fixed on this section 87
- the spring is designed and mounted so as to apply to the mobile tubular section (in a position situated at a constant non-zero distance from the horizontal axis of rotation), directly or indirectly (for example by a cable), a force substantially proportional and substantially parallel to the distance between the instantaneous position of this portion of the movable tubular section and the location into which this portion comes when the movable tubular section is in its angular configuration reference (natural balance without spring action).
Landscapes
- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Manipulator (AREA)
- Automobile Manufacture Line, Endless Track Vehicle, Trailer (AREA)
- Apparatus For Radiation Diagnosis (AREA)
Description
Claims
Applications Claiming Priority (3)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| FR9907500A FR2794738B1 (fr) | 1999-06-14 | 1999-06-14 | Bras articule de transfert de produits fluides a equilibrage par ressort dans un grand debattement |
| FR9907500 | 1999-06-14 | ||
| PCT/FR2000/001631 WO2000076908A1 (fr) | 1999-06-14 | 2000-06-13 | Bras articule de transfert de produits fluides a equilibrage par ressort dans un grand debattement |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| EP1218287A1 true EP1218287A1 (fr) | 2002-07-03 |
| EP1218287B1 EP1218287B1 (fr) | 2003-08-13 |
Family
ID=9546753
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| EP00949534A Expired - Lifetime EP1218287B1 (fr) | 1999-06-14 | 2000-06-13 | Bras articule de transfert de produits fluides a equilibrage par ressort dans un grand debattement |
Country Status (9)
| Country | Link |
|---|---|
| US (1) | US6416086B1 (fr) |
| EP (1) | EP1218287B1 (fr) |
| AT (1) | ATE247073T1 (fr) |
| AU (1) | AU6286200A (fr) |
| BR (1) | BR0011582A (fr) |
| DE (1) | DE60004545T2 (fr) |
| FR (1) | FR2794738B1 (fr) |
| RU (1) | RU2240279C2 (fr) |
| WO (1) | WO2000076908A1 (fr) |
Families Citing this family (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| FR2796375B1 (fr) * | 1999-07-13 | 2001-10-12 | Fmc Europe | Systeme de chargement offshore par tuyauterie suspendue |
| WO2013083664A2 (fr) * | 2011-12-05 | 2013-06-13 | Blue Wave Co S.A. | Système de chargement-déchargement pour opérations relatives au gnc |
| WO2014086417A1 (fr) * | 2012-12-05 | 2014-06-12 | Blue Wave Co S.A. | Bouée de chargement/déchargement pour opérations de gaz naturel comprimé |
| CN111533078A (zh) * | 2020-06-12 | 2020-08-14 | 宝钢化工湛江有限公司 | 鹤管调节机构及液体灌注设备 |
Family Cites Families (11)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US628692A (en) * | 1899-05-01 | 1899-07-11 | Albert Campbell | Flexible joint. |
| US2739779A (en) * | 1954-10-01 | 1956-03-27 | Wheaton Brass Works | Spring counterbalanced swing joint supported conduit |
| US3086552A (en) * | 1960-05-20 | 1963-04-23 | Fmc Corp | Counterbalance mechanism |
| US3378033A (en) * | 1965-05-07 | 1968-04-16 | Fmc Corp | Balancing mechanism |
| US3458167A (en) * | 1966-12-28 | 1969-07-29 | Fmc Corp | Balancing mechanism |
| SE424409B (sv) * | 1975-12-04 | 1982-07-19 | Coral Sas | Anordning for lokaliserad utsugning av gaser, rokstoft och liknande |
| US4111465A (en) * | 1976-11-26 | 1978-09-05 | Fmc Corporation | Torsionally controlled swivel joint |
| FR2483390A1 (fr) * | 1980-05-30 | 1981-12-04 | Emco Wheaton Sa | Bras articule de chargement pour fluides |
| US4537233A (en) * | 1983-06-21 | 1985-08-27 | Continental Emsco Company | Spring balance assembly |
| US5983936A (en) * | 1997-06-12 | 1999-11-16 | The Dover Corporation | Torsion spring balance assembly and adjustment method |
| FR2779422B1 (fr) | 1998-06-09 | 2000-09-01 | Fmc Europe | Bras articule de transfert de produits fluides a equilibrage par ressort en u |
-
1999
- 1999-06-14 FR FR9907500A patent/FR2794738B1/fr not_active Expired - Fee Related
-
2000
- 2000-05-31 US US09/584,309 patent/US6416086B1/en not_active Expired - Lifetime
- 2000-06-13 EP EP00949534A patent/EP1218287B1/fr not_active Expired - Lifetime
- 2000-06-13 BR BR0011582-7A patent/BR0011582A/pt active Search and Examination
- 2000-06-13 RU RU2002100351/12A patent/RU2240279C2/ru not_active IP Right Cessation
- 2000-06-13 DE DE60004545T patent/DE60004545T2/de not_active Expired - Lifetime
- 2000-06-13 AT AT00949534T patent/ATE247073T1/de not_active IP Right Cessation
- 2000-06-13 WO PCT/FR2000/001631 patent/WO2000076908A1/fr not_active Ceased
- 2000-06-13 AU AU62862/00A patent/AU6286200A/en not_active Abandoned
Non-Patent Citations (1)
| Title |
|---|
| See references of WO0076908A1 * |
Also Published As
| Publication number | Publication date |
|---|---|
| ATE247073T1 (de) | 2003-08-15 |
| BR0011582A (pt) | 2002-03-19 |
| WO2000076908A1 (fr) | 2000-12-21 |
| US6416086B1 (en) | 2002-07-09 |
| FR2794738A1 (fr) | 2000-12-15 |
| AU6286200A (en) | 2001-01-02 |
| RU2240279C2 (ru) | 2004-11-20 |
| DE60004545D1 (de) | 2003-09-18 |
| DE60004545T2 (de) | 2004-06-24 |
| FR2794738B1 (fr) | 2002-02-01 |
| EP1218287B1 (fr) | 2003-08-13 |
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