A hydraulic buffer energy storage device for an over-discharged hoist skip in a vertical shaft, comprising a vertical shaft, wherein a hoist skip is hung on an inner side of the vertical shaft, a hydraulic buffer mechanism is arranged on the inner side of the vertical shaft;
- the hoist skip is above the hydraulic buffer mechanism;
- the hydraulic buffer mechanism is communicated with an accumulator group, a pressure relief part and an oil replenishing part through oil pipelines;
- the accumulator group is communicated with an energy storage part through an oil pipeline;
- the energy storage part, the pressure relief part and the oil replenishing part are respectively communicated with an oil tank through oil pipelines;
- the hydraulic buffer mechanism is connected with a displacement sensor, the accumulator group is connected with a pressure sensor, and the displacement sensor, the pressure sensor, the energy storage part and the oil replenishing part are electrically connected with a controller;
- the hydraulic buffer mechanism comprises at least two energy-absorbing hydraulic cylinders vertically and fixedly connected to a bottom of the vertical shaft, tops of telescopic rods of all the energy-absorbing hydraulic cylinders are fixedly connected with an anti-collision beam device, the displacement sensor is connected to all the telescopic rods, rod cavities and rodless cavities of the energy-absorbing hydraulic cylinders are respectively communicated with the oil replenishing part through oil pipelines, the rodless cavities are respectively communicated with the accumulator group and the pressure relief part through oil pipelines, and an inner side of each rodless cavity is fixedly connected vertically with multiple springs;
- the oil replenishing part comprises a three-position four-way reversing valve, an oil port A of the three-position four-way reversing valve is communicated with the rodless cavity through an oil pipeline, an oil port B of the three-position four-way reversing valve is communicated with the rod cavity through an oil pipeline, the three-position four-way reversing valve is communicated with a pump source and a proportional overflow valve through oil pipelines, an oil outlet of the pump source and an oil inlet of the proportional overflow valve are both communicated with an oil port P of the three-position four-way reversing valve through oil pipelines, an oil inlet of the pump source, an oil port T of the three-position four-way reversing valve and an oil outlet of the proportional overflow valve are respectively communicated with the oil tank through oil pipelines, and the pump source, the three-position four-way reversing valve and the proportional overflow valve are electrically connected with the controller respectively;
- the pressure relief part comprises an oil replenishing one-way valve group and an overload relief valve, an oil inlet of the oil replenishing one-way valve group and an oil outlet of the overload relief valve are respectively communicated with the oil tank through an oil pipeline, and an oil outlet of the oil replenishing one-way valve group and an oil inlet of the overload relief valve are respectively communicated with the rodless cavity through an oil pipeline;
- an oil inlet of the accumulator group is communicated with an oil outlet of an energy storage one-way valve group through an oil pipeline, an oil inlet of the energy storage one-way valve group is communicated with the rodless cavity through an oil pipeline, the pressure sensor is connected with an oil outlet of the accumulator group, and the oil outlet of the accumulator group is communicated with the energy storage part through an oil pipeline;
- the energy storage part comprises a two-position two-way reversing valve, an oil inlet of the two-position two-way reversing valve is communicated with the oil outlet of the accumulator group through an oil pipe, an oil outlet of the two-position two-way reversing valve is communicated with an oil inlet of a pressure reducing valve through an oil pipe, an oil outlet of the pressure reducing valve is communicated with an oil inlet of a motor through an oil pipeline, an oil outlet of the motor is communicated with the oil tank through an oil pipe, the motor is in transmission connection with an energy storage generator, and the two-position two-way reversing valve is electrically connected with the controller.