• 专利附录
  • 专利说明
  • 权利要求
  • 类似技术
  • 同族专利
  • 引用文献
  • 法律状态
  • 优先权
    • 专利摘要:
    A multi-unit hoist apparatus is provided having an overload arrangement in the form of reversible pressure medium cylinders connected to the fixed end of each hoist unit in the apparatus. Appropriate controls are incorporated into the pressure medium supply to each unit, whereby if the load becomes unbalanced the unit subjected to an overload is relieved when the overload reaches a specific preset level.
    公开号:SU923360A3
    申请号:SU792742799
    申请日:1979-03-22
    公开日:1982-04-23
    发明作者:Виггерсхаус Фред；Шэфер Феликс
    申请人:Маннесманн Демаг Аг (Инофирма)；
    IPC主号:
    专利说明:

    (5j) DEVICE FOR PROTECTION AGAINST OVERLOAD
    LOADING MECHANISM FOR TRANSPORT
    one
    The invention relates to lifting devices, namely, devices for protection against overloading the hoist lifting mechanism.
    A device for protection is known, against overloading a lifting mechanism for transporting lengthy articles, comprising at least two lifting winches, the ropes of which are passed through blocks of hook hangers and connected to the supports on the lifting mechanism, as well. same hydraulic system with pipelines til.
    However, the known device cannot provide protection against overloading of the hoists of the load-lifting mechanism when lowering a lengthy product onto an uneven support with one end, if the product ends protrude significantly beyond the suspension points of the cargo to the winches.
    The purpose of the invention is to prevent overloading of the lifting winches when lowering the transported long-length products.
    dimensional product on the support at one end ..
    The goal is achieved by the fact that the rope of each winch is connected to the hydraulic cylinder rod, the casing of which is fixed to the lifting mechanism, the rod is equipped with a lifting winch switch, while the rod cavity of each hydraulic cylinder is connected with a check valve of the overload valve with a hydraulic system that is common to all winches and supplied fluid pump and check valves
    15 feeds that bind the pump through the pipelines to the plug cavities of the hydraulic cylinders.
    The drawing shows a diagram of the proposed device.
    权利要求:
    Claims (1)
    [1]
    20 From the lifting winches 1, the ropes 2 are skipped around the blocks 3 hooks, then around the guide rollers i and attached to the piston rods 5 of the 6 hydraulic cylinders 7, the switch 8 is fixed to the rod 5 of the left winch the working fluid and check valves 11 overload are connected to the accumulator 12 of the working fluid, from which the pump 13, after moving one of the pistons 6 through the check valve 1, pumps the cavity 9 into the corresponding volume, which has decreased in volume, p located between the piston and the bottom of the hydraulic cylinder 7, is connected by a pipeline 15 with a storage fluid 12. The pipeline 15 may be identical to the pipeline between the accumulator 12 of the working fluid and the pump 13 or the pipeline between the accumulator 12 and the overload valve 11. If, for example, the beam 16 transported by the lifting winches first lands on the support with the right end, then due to the changed lever ratios between the center of gravity of the beam and its points of application of force, the load on the left lifting winch 1 is increased. The lifting cable 2 of the left winch extends the piston 6 from the hydraulic cylinder 7 and displaces the working fluid through the check valve 11 installed for 5 overloads into the accumulator 12 of the working fluid. The switch 8 fixed on the rod 5 of the left winch disconnects both lifting winch 1 and prevents the cable from sagging on the right winch 1. The rope 2 of the left winch pulls the rod 5 out of the cylinder 7 until the beam 16 is also lowered onto the support. If the beam 16, which is inclined on the supports, raises the beam, it retains its inclined position until it comes off the supports. Then, the switched on pump 13 fills both rod cavities evenly through check valves 14, while the piston 6 in the hydraulic cylinder 7 is pressed to the bottom of the hydraulic cylinder, and the beam 16 again assumes a horizontal position. When lifting a load, overload protection is also provided. So, if the load encounters an obstacle, the rod of the overloaded winch is pulled out of the cylinder and the switch turns off both winches, which can then be switched to lowering. The proposed device provides protection against overloading of the lifting mechanism, both when lowering and when lifting long loads. Claims An overload protection device for a lifting mechanism for transporting long products, comprising at least two lifting winches, the ropes of which are passed through blocks of hook hangers and connected to the supports on the lifting mechanism, as well as a hydraulic system with pipelines, characterized in that , in order to prevent overloading of the lifting winches when the transported lengthy product is lowered onto a support at one end, the rope of each winch is connected to the hydraulic cylinder rod, the body is Secondly, it is fixed on the lifting mechanism, the rod is equipped with a lifting winch switch, the rod cavity of each hydraulic cylinder is connected with an overload check valve with a hydraulic system that is common to all winches and equipped with a pump for the working fluid, as well as non-return valve that connects the pump through pipelines with rod stock hydraulic cylinders. Sources of information taken into account during the examination 1. Patent of Germany No. 2115587, cl. 66 C 13/08, 1972 (prototype).
    N
     g
    类似技术:
    公开号 | 公开日 | 专利标题
    SU923360A3|1982-04-23|Overload protection device of hoisting gear for handling elongated products
    US2645360A|1953-07-14|Truck loader
    US4993911A|1991-02-19|Mobile crane
    US3093248A|1963-06-11|Self powered boom assembly
    US3675960A|1972-07-11|Self leveling spreader frame
    US2906413A|1959-09-29|Hydraulic crane
    US3828683A|1974-08-13|Marine load transfer system
    US3841495A|1974-10-15|Traveling overhead cranes
    CN205294639U|2016-06-08|Discharge device
    CN204659539U|2015-09-23|A kind of Self-loading-unloading radial type aluminium bag transport trolley
    US2982430A|1961-05-02|Straddle trailer
    US3187905A|1965-06-08|Jibs
    NL8304170A|1984-07-02|LIFTING INSTALLATION.
    CN106241607A|2016-12-21|Device for discharging
    RU2385282C1|2010-03-27|Cross-beam
    SU772966A1|1980-10-23|Suspension device of mine hoist vessel
    CN201116268Y|2008-09-17|Novel hoist steel wire rope compacting mechanism
    SU1129178A1|1984-12-15|Device for lifting heavy-weight loads
    RU2057056C1|1996-03-27|Load gripping crossmember
    GB1453714A|1976-10-27|Load handling equipment
    SU1567496A1|1990-05-30|Hoist
    RU2425194C2|2011-07-27|Device for automatic control over tension of cables of open-mine excavator
    US3952886A|1976-04-27|Arrangement for stabilizing an aircraft during loading and unloading operations
    US3014699A|1961-12-26|Lifting, lowering and hauling
    RU2513887C1|2014-04-20|Hoisting gear
    同族专利:
    公开号 | 公开日
    US4227679A|1980-10-14|
    DE2812687B1|1979-09-13|
    DE2812687C2|1980-06-04|
    引用文献:
    公开号 | 申请日 | 公开日 | 申请人 | 专利标题
    US3265360A|1963-06-05|1966-08-09|Tax Johann|Tower crane with auxiliary hoist|
    US3273860A|1965-03-04|1966-09-20|New York Air Brake Co|Hydraulic system|
    US3618897A|1969-06-25|1971-11-09|John J Swoboda Jr|Constant tensioning system|
    NL7011527A|1970-08-04|1972-02-08|
    NL162609C|1976-05-05|1980-06-16|Ihc Holland Nv|SWING COMPENSATION DEVICE FOR A CRANE.|DE3334530A1|1983-09-23|1985-04-04|Siemens AG, 1000 Berlin und 8000 München|METHOD FOR RAPID MEASURING OF ELECTRICAL SIGNALS AT CIRCUIT NODES OF INTEGRATED CIRCUITS IN WHICH ALSO SIGNAL SIGNALS ARE DETECTED, AND DEVICE FOR IMPLEMENTING SUCH A METHOD|
    DE3407041A1|1984-02-27|1985-09-05|Siemens AG, 1000 Berlin und 8000 München|METHOD FOR AUTOMATICALLY ADJUSTING THE WORKING POINT IN SIGNAL CURRENT MEASUREMENTS WITH CARPULAR RAY MEASURING DEVICES|
    FR2608576A1|1986-12-23|1988-06-24|Neyrpic|Carriage for a travelling crane or the like with a closed cinematic lifting chain provided with a system making it possible to eliminate its static redundancy|
    FR2615500B1|1987-05-20|1989-07-28|Reel Sa|LOAD COMPENSATOR DEVICE FOR A HANDLING MACHINE AND METHOD FOR IMPLEMENTING SUCH COMPENSATION|
    DE3729064C2|1987-08-31|2003-01-09|Tax Ingenieurgmbh|Redundant winch system|
    EP0310816B1|1987-09-30|1991-11-06|Siemens Aktiengesellschaft|Automatic frequency following in a corpuscular beam-measuring method using a modulated primary beam|
    法律状态:
    优先权:
    申请号 | 申请日 | 专利标题
    DE19782812687|DE2812687C2|1978-03-23|1978-03-23|Overload protection for a hoist|
    [返回顶部]