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Closed hydraulic system for synchronous chip sealer

A hydraulic system, vehicle-closed technology, which is applied to fluid pressure actuating devices, roads, road repairs, etc., can solve the problems of complex structure, difficult adjustment, and many contacts of the open hydraulic system, and achieve easy adjustment and maintenance. Simple structure and fewer contacts

Inactive Publication Date: 2009-02-11
SHENYANG NORTH TRAFFIC HEAVY IND
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  • Abstract
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  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The open hydraulic system has a complex structure, many contacts, high failure rate, difficult adjustment, and a large oil storage tank

Method used

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  • Closed hydraulic system for synchronous chip sealer

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Embodiment Construction

[0008] The embodiments of the present invention will be described in detail below in conjunction with the accompanying drawings: According to construction needs, the revolution ratios of the motors in the hydraulic system are manually adjusted in advance through the throttle valves (8) in the superimposed control valves.

[0009] Turn on the diesel engine on the car and drive the closed variable displacement plunger pump (1) to rotate through the universal joint. The pressure-regulating superimposed control valve (C) returns to the low-pressure pipeline of the channel plate, and enters the main pump from the B return port to ensure the no-load start of the main pump. During construction work, control the solenoid valve in the closed variable plunger pump (1) to work according to the PLC electronic control program on the synchronous sealing vehicle, cut off the passage from the high-pressure oil area to the low-pressure oil area, make the A port in a high-pressure state, and ope...

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Abstract

A synchronous sealing vehicle closed hydraulic system belongs to a hydraulic control system of engineering machinery, which is the combination of a closed variable plunger pump, various supraposition hydraulic control valves and hydraulic motors. With the control of PLC electronic signals on the vehicle, the synchronous sealing work of the hydronic heating of asphalt, the spraying of asphalt, the spreading of stone chips, the feeding of stone chips bins, and the like, can be realized in a coordinating way. Compared with open hydraulic systems, the hydraulic system is characterized by simple structure, few joints, and being easy to be adjusted and repaired.

Description

technical field [0001] The invention belongs to a hydraulic control system of engineering machinery. Background technique [0002] The synchronous sealing vehicle is an engineering vehicle that can simultaneously spread asphalt and stone chips on the road to complete the road sealing. The coordinated realization of asphalt circulation heating, asphalt spraying, and stone chip spreading is controlled by the hydraulic system of the synchronous sealing vehicle. At present, the hydraulic system of the synchronous sealing vehicle generally adopts an open hydraulic system, that is, the hydraulic oil in the oil storage tank is pumped out by the main oil pump, and returned to the oil storage tank after each hydraulic control motor or oil cylinder does work. For example, the domestic TBS3500 asphalt macadam synchronous sealing vehicle adopts this open hydraulic control system. The open hydraulic system has a complex structure, many contacts, a high failure rate, difficult adjustmen...

Claims

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Application Information

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IPC IPC(8): F15B11/02E01C19/21
Inventor 曲凯张士俊尹继新刘林山
Owner SHENYANG NORTH TRAFFIC HEAVY IND