Asphalt cyclic spraying device

Abstract

The invention relates to an asphalt cyclic spraying device which comprises a material feed channel communicated with an asphalt tank. According to the technical key point, one end of the material feed channel is connected with a material feed control valve body; the material discharge end of the material feed control valve body is communicated with an asphalt pump, and asphalt supply and asphalt non-supply between the asphalt pump and the material feed channel are controlled by the material feed control valve body; the material discharge end of the asphalt pump is communicated with an asphalt control valve body provided with a plurality of gears for controlling backflow or spraying of the asphalt; a first material outlet, a second material outlet, a third material outlet and a material inlet are formed in the asphalt control valve body; the material inlet is communicated with the material discharge end of the asphalt pump; the first material outlet is communicated with a backflow pipeline for leading the asphalt back to the asphalt tank; the second material outlet and the third material outlet are communicated with each other through a communicating pipeline; and the communicating pipeline is communicated with a spraying device. The asphalt cyclic spraying device can control the asphalt to backflow and then to be sprayed, so that the spraying temperature of the asphalt is guaranteed, and the asphalt cyclic spraying device can easily control the asphalt.

Description

【Technical field】 [0001] The present invention relates to an asphalt distributing device, in particular to an asphalt distributing device which is distributed after passing through an asphalt heating device. 【Background technique】 [0002] When asphalt is used for road paving, it is sprayed by an asphalt sprayer, and the asphalt is put into an asphalt tank and sprayed by a spraying device. Since the asphalt is solid or semi-solid at room temperature, it has strong adhesion. , the fluidity is poor, so the asphalt needs to be heated before spraying. Most of the existing asphalt distributors directly spray the asphalt after heating. Since the sprinkler is in a normal temperature state before the asphalt, when the asphalt is sprayed for the first time and flows through the sprinkler, the temperature will decrease and the spraying temperature will not be reached. , so that if sprayed directly from the nozzle, it may become semi-solid, thereby blocking the nozzle. The existing a...

AI Technical Summary

Problems solved by technology

Most of the existing asphalt distributors heat the asphalt and spray it directly. Since the asphalt spraying device is in a normal temperature state before the asphalt asphalt, when the asphalt is sprayed for the first time and flows through the spraying device, the temperature will drop and the spraying temperature will not be reached. , so that if sprayed directly from the nozzle, it may become semi-solid, thereby clogging the nozzle

Existing asphalt spraying devices all use butterfly valves to control the material in and out, the sealing is not good enough, and the structure is complicated. Usually, multiple butterfly valves are required to be connected together for control, and one valve is used to control one nozzle opening, so the production cost is higher. , inconvenient to control

Images