Title:
SAFETY BRAKING SYSTEM FOR FREE-FALLING WEIGHTS
Document Type and Number:
WIPO Patent Application WO/2014/076687
Kind Code:
A2
Abstract:
The invention relates to a safety braking system for free-falling weights, comprising a dynamo as an acceleration sensor and an electric generator, which also activates the mechanism that exerts the braking force on the falling movement of a weight. The weight comprises two cables, wound in opposite directions to one another, a frame, a friction disc, and two journals on which a shaft is mounted. In addition, a drum is installed on the shaft, said drum being provided with two reels, namely, reel 1 on which the main cable that supports the weight is wound in the opposite direction to that of reel 2 on which the secondary cable is wound, said secondary cable in turn supporting the counterweight, and vice versa, corresponding to a system for retracting the main cable. Furthermore, one of the ends is provided with a speed amplifier which rotates the dynamo at the number of revolutions necessary in order to generate at least the 12 volts required in a solenoid valve. In this way, the solenoid valve opens and allows the passage of pressurised hydraulic oil to the calipers so that they close on the friction disc and exert the force required to stop the falling movement of the weight. The invention is characterised in that it is provided internally with a hydraulic oil storage unit containing an expanding bladder filled with nitrogen, which maintains the hydraulic oil at a pressure of 1,000 pounds (68 atm). This guarantees stored energy that can be used as needed in order to active the calipers which stop the disc installed on the shaft and prevent the weight from falling. The system detects when a body enters free-fall, once it has past the first 50 cm. With this mechanism the angular velocity at the brake shaft feeds the input of the speed amplifier, providing a high velocity at the output shaft of the speed amplifier and generating the voltage necessary in the dynamo in order for the solenoid valve to open.
Inventors:
LADRÓN DE GUEVARA ALEJANDRO (CO)
Application Number:
PCT/IB2013/060257
Publication Date:
May 22, 2014
Filing Date:
November 19, 2013
Export Citation:
Assignee:
SERINPET LTDA REPRESENTACIONES Y SERVICIOS DE PETROLEOS (CO)
Foreign References:
| GB434210A | 1935-08-28 | |||
| FR816218A | 1937-08-03 | |||
| GB158867A | 1922-03-22 | |||
| GB272222A | 1928-10-02 | |||
| US3934856A | 1976-01-27 |
Other References:
DATABASE WPI Derwent Publications Ltd., London, GB; AN AN-2010-C51812 RETRIEVED & EP 2 184 252 A1 (TEREX DEMAG GMBH) 12 May 2010
DATABASE WPI Derwent Publications Ltd., London, GB; AN AN-2010-A52719 & CN 2013 673 28Y Y (HUNAN JINSANXING COAL MACHINER) 23 December 2009
DATABASE WPI Derwent Publications Ltd., London, GB; AN AN-2010-A52719 & CN 2013 673 28Y Y (HUNAN JINSANXING COAL MACHINER) 23 December 2009
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