EP2199244A1 - Ascenseur hydraulique - Google Patents
Ascenseur hydraulique Download PDFInfo
- Publication number
- EP2199244A1 EP2199244A1 EP09179422A EP09179422A EP2199244A1 EP 2199244 A1 EP2199244 A1 EP 2199244A1 EP 09179422 A EP09179422 A EP 09179422A EP 09179422 A EP09179422 A EP 09179422A EP 2199244 A1 EP2199244 A1 EP 2199244A1
- Authority
- EP
- European Patent Office
- Prior art keywords
- fixed
- tubular riser
- piston
- cabin
- cylinder
- 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
- 239000012530 fluid Substances 0.000 claims abstract description 14
- 238000004873 anchoring Methods 0.000 claims abstract description 5
- 238000007599 discharging Methods 0.000 claims abstract description 3
- 230000002093 peripheral effect Effects 0.000 claims 1
- 108010066057 cabin-1 Proteins 0.000 description 11
- 238000011144 upstream manufacturing Methods 0.000 description 2
- 238000013459 approach Methods 0.000 description 1
- 238000013016 damping Methods 0.000 description 1
- 238000006073 displacement reaction Methods 0.000 description 1
- 230000005484 gravity Effects 0.000 description 1
- 238000009434 installation Methods 0.000 description 1
- 238000005457 optimization Methods 0.000 description 1
- 238000005086 pumping Methods 0.000 description 1
Images
Classifications
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B66—HOISTING; LIFTING; HAULING
- B66B—ELEVATORS; ESCALATORS OR MOVING WALKWAYS
- B66B9/00—Kinds or types of lifts in, or associated with, buildings or other structures
- B66B9/04—Kinds or types of lifts in, or associated with, buildings or other structures actuated pneumatically or hydraulically
Definitions
- the present invention relates to hydraulic lifts.
- hydraulically operated lifts have been developed where the cabin is raised and lowered by means of the reciprocating displacement of a piston sliding inside a single-acting cylinder, the end of which is mounted on the floor of the pit inside the lift travel shaft.
- Fig. 1 of the accompanying drawings A side elevation and partially sectioned view of an example of a known hydraulic lift is shown schematically in Fig. 1 of the accompanying drawings.
- 8 denotes a tubular cylinder which extends from the bottom floor 4 of the lift pit to about halfway along the overall height of the travel which is to be performed by the lift cabin 1.
- the object of the present invention is therefore to provide a hydraulic lift which is able to overcome the drawbacks of the known hydraulic lifts and which allows optimization of the amount of energy which is used in order to raise and lower the cabin, resulting in a considerable saving in energy which can be calculated as being equivalent to about two thirds of that of the hoisting systems of conventional hydraulic lifts.
- the hydraulic lift comprises a tubular riser 17 consisting of two fixed tubular stems which are fixed at their ends between the bottom part or floor 4 of the travel shaft of the lift cabin and the top part or ceiling 12 of this shaft.
- the stems of the riser 17 are connected at their ends to unions 18 and 19 for supplying and/or discharging, respectively, a hydraulic fluid, which are associated with a hydraulic circuit comprising a motor-driven pump (not shown).
- 121 denotes a fixed cylindrical piston which is positioned at the central end of the stems of the riser 17 and is concentric with said stems of the tubular riser.
- Said piston 121 also comprises a fixed diaphragm 221 which divides the internal compartment of said tubular riser 17 into two chambers 26 and 126 which are not interconnected.
- 16 denotes a movable cylinder which is positioned coaxially around these stems of the fixed riser 17 so as to create a cylindrical cavity 20 and 120 which is formed between these stems of the fixed riser 17 and this movable cylinder 16 and inside which said fixed cylindrical piston 121 is sealingly positioned for example by means of a double set of O-rings 22.
- the chambers 26 and 126 communicate, upstream and downstream of the piston 121, respectively, via radial apertures 24 and 23, with the cylindrical cavities 120 and 20 of the cylinder 16.
- the counterweight 15 is mounted on the cylinder 16, and the idle pulleys 13 are keyed onto the cylinder/counterweight assembly by means of the spindles 14.
- the movable cylinder 16 has a length equal to about half the height of the fixed riser 17 for the purposes which will be described below.
- Fig. 2 of the accompanying drawings 1 denotes the cabin of the lift.
- the ends of the cables 2 (only one of which is visible in the figures) are fixed to the structure of the cabin 1.
- Each of these cables 2 is driven, upstream of the cabin, around a first pair of idle pulleys 11 which are fixed to the top part 12 of the lift housing structure. From this first pair of pulleys 11 the cables 2 pass around a second series of idle pulleys 13, the spindles 14 of which are fixed laterally to the cylinder/counterweight assembly 15, 16 and, from these pulleys 13, the cables 2 lead to the anchoring means 204 on the ceiling 12 of the structure.
- the counterweight 15 must have a weight such as to counterbalance the weight of the lift cabin 1 plus part of carrying capacity.
- Fig. 5 shows a constructional variant of the present hydraulic lift in which identical parts have the same numbers as that used in the above description.
- the central piston which is positioned at half the height and concentric with the stems 171 and 172 of the tubular riser 17, is formed in this variant by two pistons 121 and 122 each equipped with a diaphragm 221 and 222.
- a chamber 300 is therefore formed between these diaphragms 221 and 222, resulting in a reduction in the working stroke of the cylinder 16; in fact, the greater the distance between the attachment point fixed to the top part 12 and the attachment point fixed to the bottom part 4, the greater will be the size of this chamber 300 between the diaphragms 221 and 222 of the two pistons 121 and 122 and the smaller will be the extension of the cylindrical cavities 20 and 120.
- the pressure of the hydraulic fluid inside the chamber 300 must always be less than or equal to the pressure inside the cavities 20 and 120 and therefore two non-return valves 30 and 31 are positioned on the diaphragms 221 and 222. These non-return valves 30 and 31 allow the hydraulic fluid which is present inside the chamber 300 to pass into the cavities 20 and 120 should the pressure of the fluid inside the chamber 300 be greater than the pressure inside the cavities 20 and 120.
- Two cylindrical sleeves 250 and 251 are also formed in the vicinity of the ends of the cylinder 16.
- a series of radial apertures 230, 231 and 232 connecting the chamber 126 to the cylindrical cavity 20 are formed on the stem 172 in the vicinity of the piston 121, while a series of radial apertures 240, 241, 242 connecting the chamber 26 to the cylindrical cavity 120 are formed in the vicinity of the piston 122.
- the sleeve 251 will gradually obstruct the radial apertures 240, 241 and 242, damping the contact between this cylinder 16 and the piston 112.
- contact between the top end of the cylinder 16 and the piston 221 will be cushioned by gradual closing of the radial apertures 230, 231 and 232.
- Fig. 4 shows a further constructional variant of the present hydraulic lift in which the cables 2 fixed to the cabin 1, once they have passed around the pulleys 11, are fixed directly to the cylinder 16 by means of the corresponding attachment points 32.
- This variant of the present lift may be used in the case where the distance between the attachment points on the top part 12 and the bottom part 4 is greater than twice the working stroke of the lift. With this variant it is also possible to reduce the weight of the counterweight by about half.
Landscapes
- Engineering & Computer Science (AREA)
- Automation & Control Theory (AREA)
- Structural Engineering (AREA)
- Types And Forms Of Lifts (AREA)
- Actuator (AREA)
- Braking Systems And Boosters (AREA)
- Valve Device For Special Equipments (AREA)
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| IT000106A ITGE20080106A1 (it) | 2008-12-19 | 2008-12-19 | Ascensore idraulico |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| EP2199244A1 true EP2199244A1 (fr) | 2010-06-23 |
| EP2199244B1 EP2199244B1 (fr) | 2011-08-03 |
Family
ID=41682776
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| EP09179422A Not-in-force EP2199244B1 (fr) | 2008-12-19 | 2009-12-16 | Ascenseur hydraulique |
Country Status (4)
| Country | Link |
|---|---|
| EP (1) | EP2199244B1 (fr) |
| AT (1) | ATE518797T1 (fr) |
| ES (1) | ES2368609T3 (fr) |
| IT (1) | ITGE20080106A1 (fr) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| ES2426513R1 (es) * | 2011-07-06 | 2013-12-04 | Gen Elevadores Xxi S L | Suelo practicable para cabinas elevadoras y similares |
Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE3002577A1 (de) * | 1980-01-25 | 1981-07-30 | M.A.N. Maschinenfabrik Augsburg-Nürnberg AG, 8500 Nürnberg | Hydraulischer aufzug mit indirekt wirkendem antrieb |
| EP0254840A2 (fr) * | 1986-06-11 | 1988-02-03 | Inventio Ag | Procédé et dispositif pour lever et abaisser une charge par un moteur linéaire hydraulique |
| WO2000071456A1 (fr) * | 1999-05-19 | 2000-11-30 | Wittur Ag | Ascenseur hydraulique |
| JP2001063939A (ja) * | 1999-08-31 | 2001-03-13 | Oil Drive Kogyo Kk | 可動シリンダとこれを用いた油圧エレベータ |
Family Cites Families (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| GB0006033D0 (en) * | 2000-03-13 | 2000-05-03 | Ganus Eng Co Ltd | Hydraulic synchronised cylinder |
| DE10043051B4 (de) * | 2000-09-01 | 2004-12-09 | Zf Sachs Ag | Führung einer Kolbenstange für ein Kolben-Zylinder-Aggregat |
| WO2005082766A2 (fr) * | 2004-02-24 | 2005-09-09 | Anna Widmann | Entrainement hydraulique a piston fixe pour des ascenseurs |
-
2008
- 2008-12-19 IT IT000106A patent/ITGE20080106A1/it unknown
-
2009
- 2009-12-16 AT AT09179422T patent/ATE518797T1/de not_active IP Right Cessation
- 2009-12-16 EP EP09179422A patent/EP2199244B1/fr not_active Not-in-force
- 2009-12-16 ES ES09179422T patent/ES2368609T3/es active Active
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE3002577A1 (de) * | 1980-01-25 | 1981-07-30 | M.A.N. Maschinenfabrik Augsburg-Nürnberg AG, 8500 Nürnberg | Hydraulischer aufzug mit indirekt wirkendem antrieb |
| EP0254840A2 (fr) * | 1986-06-11 | 1988-02-03 | Inventio Ag | Procédé et dispositif pour lever et abaisser une charge par un moteur linéaire hydraulique |
| WO2000071456A1 (fr) * | 1999-05-19 | 2000-11-30 | Wittur Ag | Ascenseur hydraulique |
| JP2001063939A (ja) * | 1999-08-31 | 2001-03-13 | Oil Drive Kogyo Kk | 可動シリンダとこれを用いた油圧エレベータ |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| ES2426513R1 (es) * | 2011-07-06 | 2013-12-04 | Gen Elevadores Xxi S L | Suelo practicable para cabinas elevadoras y similares |
Also Published As
| Publication number | Publication date |
|---|---|
| ATE518797T1 (de) | 2011-08-15 |
| ITGE20080106A1 (it) | 2010-06-20 |
| ES2368609T3 (es) | 2011-11-18 |
| EP2199244B1 (fr) | 2011-08-03 |
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