Hydraulic system of coil stripping car

Abstract

The invention discloses a hydraulic system of a coil stripping car and belongs to the technical field of steel-making equipment. The system comprises a lifting oil cylinder arranged at the bottom of the coil stripping car, wherein a first hydraulic control reversal valve is arranged between the lifting oil cylinder and a pressure oil source; a balance valve is arranged between a rodless cavity of the lifting oil cylinder and the first hydraulic control reversal valve; a control end of the balance valve is connected with a rod cavity of the lifting oil cylinder; a third hydraulic control lock and a second overflow valve are sequentially connected between the rodless cavity of the lifting oil cylinder and an oil return end of the pressure oil source; a control end of the third hydraulic control lock is connected with a solenoid control valve; and a pressure sensor is connected between the rodless cavity of the lifting oil cylinder and the third hydraulic control lock. The hydraulic system can solve the problems of low feedback sensitivity of the pressure sensor to the pressure change of the lifting oil cylinder, and crush damage and interlayer adhesion damage of an inner race and an outer race of a coil due to pressure fluctuation of the hydraulic system in the existing hydraulic system of the coil stripping car.

Description

technical field [0001] The invention relates to the technical field of steelmaking equipment, in particular to a hydraulic control system for a coil unloading trolley. Background technique [0002] The coil unloading trolley is the equipment that unloads the steel coil from the coiler and transports it to the walking beam for storage, including the coil unloading process. a kind of like figure 1 The hydraulic system of the unloading trolley shown includes a lifting cylinder 17 located at the bottom of the unloading trolley. The lifting cylinder 17 supplies oil to it through two branches, one of which is connected to the pressure oil source through the first hydraulic control reversing valve 12 11 connection; the other is sequentially connected with a throttle valve 131 and a second hydraulic control lock 132 between the rodless chamber of the lifting cylinder 17 and the second hydraulic control valve 133, and the second hydraulic control valve 133 and the pressure A first ...

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Problems solved by technology

[0003] The technical problem to be solved by the present invention is to provide a hydraulic system for unloading trolley, which can solve the problem of low sensitivity of the pressure sensor to the pressure change feedback of the lifting cylinder and the pressure fluctuation of the hydraulic system itself in the existing hydraulic system of unloading trolley. Problems of extrusion damage and interlayer sticking damage on the inner and outer rings of the coil

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