Frequency conversion construction hoist
A technology for construction lifts and lift frames, which is applied in lifts, transportation and packaging, etc. It can solve the problems of casualties, equipment damage, loss of life and property safety, etc., and achieve the effects of smooth and linear reduction of running speed, improvement of comfort, and precise parking position
Active Publication Date: 2020-08-07
SICHUAN CONSTR MACHINERY GRP
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Problems solved by technology
However, at the construction site, it sometimes happens that the top or the bottom is pushed, and the resulting casualties and equipment damage have caused huge losses to the safety of people's lives and property.
Method used
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[0019] The present invention will be further described below in conjunction with the accompanying drawings and specific embodiments.
[0020] Such as figure 1 with figure 2 As shown: the frequency conversion construction hoist includes a lifting frame 1, a cage 5, a control device and a variable frequency motor driving the cage 5; the bottom of the lifting frame 1 has a bottom deceleration stopper 2, a bottom terminal stopper 3 and a bottom limit stopper 4, and the elevator The top of the frame 1 has a top deceleration stopper 10, a top end stopper 11 and a top limit stopper 12; the control device includes a frequency converter, an electromagnetic brake and a deceleration stopper 6, a terminal stopper 7 and Limit switch 8; the inverter controls the input frequency of the variable frequency motor; the deceleration limiter 6 controls the output frequency of the inverter by f 工 decreases linearly to f 低 , the terminal limiter 7 controls the output frequency of the inverter by...
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The invention discloses a variable-frequency construction lift, and relates to the technical field of building machinery. In the variable-frequency construction lift, a cage can stably, precisely andreliably stop at the top and the bottom of a lift rack. The variable-frequency construction lift comprises the lift rack, the cage, a control device and a variable-frequency motor for driving the cage; the bottom of the lift rack is provided with a speed reduction stop, a terminal stop and a limit stop; the control device comprises a frequency converter, an electromagnetic brake, a speed reductionlimiter, a terminal limiter and a limit switch, wherein the speed reduction limiter, the terminal limiter and the limit switch are arranged on the cage; when the speed reduction limiter touches the speed reduction stop, the cage is triggered to reduce speed; when the terminal limiter touches the terminal stop, the cage is triggered to further reduce speed; when the limit switch touches the limitstop, the cage is triggered to brake forcibly; the installation position and length of each stop are strictly circulated according to formulas. By strictly calculating the installation positions and lengths of the speed reduction stop, the terminal stop and the limit stop, it is guranateed that the stopping position of the cage is accurate.
Description
technical field [0001] The invention relates to the field of construction machinery, in particular to a frequency conversion construction hoist. Background technique [0002] The frequency conversion construction hoist is operated through the linkage operation console to change the output frequency of the frequency converter, and then control the speed of the frequency conversion motor to change the running speed of the hoisting cage, so as to achieve the operation requirements of uniform acceleration, uniform speed and uniform deceleration. However, at the construction site, there are occasions when people rush to the top or sit on the bottom, and the resulting casualties and equipment damage have caused huge losses to the safety of people's lives and property. The frequency conversion construction elevator has a close relationship with the improper setting of the braking device. Contents of the invention [0003] The technical problem to be solved by the present inventi...
Claims
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IPC IPC(8): B66B1/30
CPCB66B1/30
Inventor 张闯闯李智
Owner SICHUAN CONSTR MACHINERY GRP