Hydraulic system, interlocking device thereof and overhead working truck

• Main Authors: HE TAO, ZHANG YONG, ZHANG ZHUO, LIANG YING, XIA ZICHAO, XU QINXIAN
• Format: Patent
• Language: Chinese; English
• Published: 28.06.2022
• Subjects: BLASTING; DETAILS OF FLUID-PRESSURE SYSTEMS, NOT OTHERWISE PROVIDED FOR; FLUID-PRESSURE ACTUATORS; FLUID-PRESSURE ACTUATORS, e.g. SERVO-MOTORS; HEATING; HYDRAULICS OR PNEUMATICS IN GENERAL; LIGHTING; MECHANICAL ENGINEERING; SYSTEMS ACTING BY MEANS OF FLUIDS IN GENERAL; WEAPONS

The interlocking device of the hydraulic system comprises a hydraulic oil tank, a first oil pump and a three-position four-way valve, an oil inlet and an oil return port of the three-position four-way valve are both connected with the hydraulic oil tank, the first oil pump is arranged on a pipeline between the oil inlet and the hydraulic oil tank, and the first oil pump is arranged on a pipeline between the oil return port and the hydraulic oil tank. A first working port of the three-position four-way valve is connected with the landing leg working loop, and a second working port of the three-position four-way valve is connected with the loading working loop, so that interlocking of oil supply of the landing leg working loop and the loading working loop can be realized through the arrangement of the three-position four-way valve, and the situation that the landing leg working loop still has power when the loading working loop works is avoided; when the supporting leg working loop works, the upper vehicle work