Convergence valve group, power generation heating hydraulic confluence control system and paver

Abstract

The invention discloses a confluence valve group, a power generation heating hydraulic confluence control system and a paver. The confluence valve group includes a working pressure feedback valve, a reversing valve, a first hydraulic one-way valve and a second hydraulic one-way valve, wherein the control oil circuits of the working pressure feedback valve, the first and the second hydraulic one-way The directional valve is connected, and the working pressure feedback valve is controlled by the directional valve to communicate with the control oil circuit of the first hydraulic one-way valve or the second hydraulic one-way valve. The confluence valve group is installed between the first hydraulic working system and the second hydraulic working system of the power generation heating hydraulic confluence control system, thereby controlling the independent work or hydraulic confluence of the first and second hydraulic working systems, with simple structure and convenient control. The small displacement pump can realize power generation and heating in the low-speed economical gear of the engine, which reduces the cost of choosing a large displacement pump, reduces engine fuel consumption, and realizes energy saving.

Description

technical field [0001] The invention mainly relates to the field of hydraulic technology, and in particular to a confluence valve group, a power generation heating hydraulic confluence control system and a paver equipped with the confluence valve group. Background technique [0002] The paver is an important road construction machine. During the construction operation, the asphalt mixture is mainly compacted and ironed by the screed, so as to form a pavement layer that meets the requirements of a certain width, thickness, flatness and compactness. In order to prevent the paver from sticking to the bottom of the screed and affect the paving performance, the paver needs to heat the bottom of the screed to a certain temperature before paving the asphalt mixture. Therefore, it is necessary to set the screed heating on the paver device. [0003] At present, the heating of paver screed at home and abroad mainly adopts gas heating and electric heating. When gas heating is used, t...

AI Technical Summary

Problems solved by technology

When gas heating is used, the environmental protection is poor and the operability is poor

When electric heating is used, the generator is mainly driven to generate electricity, and the electric energy is converted into heat to realize heating. At present, the generator is mainly driven by the engine belt drive and the hydraulic motor. This kind of power generation and heating control system has low efficiency and low fuel consumption. High, poor energy saving, poor stability of power generation and heating voltage; or through mechanical transmission, mainly using variable frequency generator to realize the low-speed economic gear of the engine to meet the requirements of power generation and heating, thereby reducing engine fuel consumption and realizing energy saving, but the system reliability is poor; or The hydraulic drive motor power generation control method is adopted, and the control is realized by changing the displacement of the pump. However, when the low-speed economic gear of the engine is to be used for power generation, the selection of the pump displacement will be too large, and the cost will increase, while the paver is in normal paving operation. When the engine is usually at rated speed, the pump will not be used efficiently

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