Hydraulic control system for long-head mine vehicle

Abstract

The invention discloses a hydraulic control system for a long-head mine vehicle. A one-way liquid filling valve is arranged in a pressure oil output pipeline of a gear pump, and when the pressure value of the system is lower than the set value, the one-way liquid filling valve conducts liquid filling work; an oil outlet of the one-way liquid filling valve communicates with an oil inlet of a three-way ball valve, and an oil outlet of the three-way ball valve communicates with an oil inlet of a reverse adjusting pedal valve through a stop valve; and an oil outlet of the reverse adjusting pedal valve is connected with an oil outlet of a manual pump. The hydraulic control system for the long-head mine vehicle has the advantages that brake force is output linearly, so that it is guaranteed that the situation that locking occurs as soon as braking is conducted is avoided, comfortable and universal operation is provided for a user, and the adaptive capacity of the vehicle is improved; the service life of the gear pump can be prolonged substantially, and the reliability of the system is improved; by using the manual pump, a wet brake can be started emergently under the condition that the hydraulic system loses a power source, convenient maintenance of the vehicle is guaranteed, and the maintainable using performance of the vehicle type is improved; and the locking condition is avoided when normal continuous braking is conducted, and the operability of the system is improved.

Description

technical field [0001] The invention relates to a hydraulic control system of a transport vehicle, in particular to a hydraulic control system of a mine vehicle with a long head. Background technique [0002] The hydraulic control system currently used in transport vehicles is usually directly connected to the pedal valve by the gear pump. Therefore, the system pressure is set by the relief valve. No matter how the system pressure changes, the gear pump always works at high pressure for a long time, which directly affects the gear pump. When the oil passes through the overflow valve, a large amount of heat will be generated, which will affect the normal operation of the entire system; when the hydraulic system loses its power source, the entire system will be locked, the wet brake cannot be opened, the vehicle cannot move in the mine tunnel, and the vehicle cannot Drive out of the mine for maintenance. Contents of the invention [0003] The purpose of the present inventio...

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Problems solved by technology

[0002] The hydraulic control system currently used in transport vehicles is usually directly connected to the pedal valve by the gear pump. Therefore, the system pressure is set by the relief valve. No matter how the system pressure changes, the gear pump always works at high pressure for a long time, which directly affects the gear pump. When the oil passes through the overflow valve, a large amount of heat will be generated, which will affect the normal operation of the entire system; when the hydraulic system loses its power source, the entire system will be locked, the wet brake cannot be opened, the vehicle cannot move in the mine tunnel, and the vehicle cannot Drive out of the mine for repairs

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