A spreader lowering speed control system and a stacker
A technology of speed control and speed control valve, which is applied in the field of stacker, can solve the problems affecting the operating comfort and the service life of the twist lock mechanism of the spreader, etc.
Active Publication Date: 2016-08-10
SANY MARINE HEAVY IND
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Problems solved by technology
[0004] When the spreader of the stacker grabs the container, the spreader will often hit the container heavily due to the operating habits of the operator, which will affect the service life of the twist lock mechanism of the spreader to a certain extent; and the spreader is heavy. If the ground hits the container, it will bring huge impact sound and vibration, which affects the comfort of operation
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[0023] In order to enable those skilled in the art to better understand the technical solutions of the present invention, the present invention will be further described in detail below in conjunction with the accompanying drawings and specific embodiments.
[0024] Please see figure 1 , figure 2 , figure 1 It is a functional block diagram of a specific embodiment of the lowering speed control system of the spreader provided by the present invention; figure 2 for figure 1 Schematic diagram of the installation position of the middle distance detection device.
[0025] Such as figure 1 , figure 2 As shown, the descending speed control system of the spreader 12 provided by the present invention includes a distance detection device 1 and a controller 2, the displacement signal output end of the distance detection device 1 is connected to the displacement signal receiving end of the controller 2, The control signal output end of the controller 2 is connected to the control...
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Disclosed are a descending speed control system of sling and a piling crane provided with the descending speed control system of sling. The descending speed control system of sling comprises a distance detecting device (1) and a controller (2). A displacement signal output end of the distance detecting device (1) is connected to a distance signal receiving end of the controller (2), and a control signal output end of the controller (2) is connected to a control end of a gantry descending proportional valve (3). The distance detecting device (1) detects the vertical distance S between the lower end of the sling (12) and the upper surface of a container (11), and sends a distance signal. The controller (2) receives the distance signal, and calculates the maximum allowable opening a2 of the gantry descending proportional valve (3) based on a formula of a2=g(s), and controls the actual opening of the gantry descending electric proportional valve not to be greater than the maximum allowable opening a2.
Description
technical field [0001] The invention relates to the technical field of stackers, in particular to a lowering speed control system of a spreader. The present invention also relates to a stacker with the above-mentioned lowering speed control system of the spreader. Background technique [0002] A forklift is a common type of handling equipment used to lift and carry loads in a safer manner. The stacker can be used to lift the container. The stacker uses the spreader installed on the mast to grab the container. The direction of lifting, and then to achieve the container grabbing, lifting and handling operations. [0003] The lowering speed V of the spreader is proportional to the actual opening a of the mast lowering proportional valve, that is, V=k*a, where k is the proportional coefficient; usually the lowering speed of the spreader is controlled by controlling the opening of the mast proportional valve V, the operator usually controls the opening a1 of the electric propo...
Claims
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IPC IPC(8): B66F9/075B66F9/07
CPCB66C13/23
Inventor 周嵩山刘志刚石伟
Owner SANY MARINE HEAVY IND