Operating valve block, emergency hydraulic control system and working machine

• Main Authors: ZOU YANHU, TIAN JINGZHONG, YASUE MASARU
• Format: Patent
• Language: Chinese; English
• Published: 29.04.2022
• 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 invention relates to the field of hydraulic control, and provides an operation valve block, an emergency hydraulic control system and an operation machine.The operation valve block is characterized in that a first pressure reducing valve is arranged between a first oil inlet and a first oil outlet of the operation valve block, and a sequence valve is arranged between the first oil inlet and a third oil outlet; the opening pressure of the sequence valve is larger than the set pressure of the first pressure reducing valve. The defects that cost is high and operation is complex due to the fact that two oil pumps serve as a power source and a pilot oil source are overcome. According to the operating valve block provided by the invention, the first pressure reducing valve and the sequence valve are arranged among the first oil inlet, the first oil outlet and the third oil outlet, and the opening pressure of the sequence valve is greater than the set pressure of the first pressure reducing valve; pressure oil o