Screw pump for pitch conveying

Abstract

The invention discloses a screw pump for pitch conveying. The screw pump comprises a screw pump body, a coupler, a motor and a base, wherein the screw pump body and the motor are fixed to the base with bolts; heat preservation layers are arranged at the two sides of the screw pump body through first flanges; a cover plate is arranged at the upper end of the screw pump body; a mechanical sealing layer is arranged between the cover plate and the upper end of the screw pump body; and an oil filling hole and a relief valve are formed in and arranged at the upper end of the screw pump body.

Description

technical field [0001] The invention belongs to the technical field of asphalt transportation, and in particular relates to a screw pump for asphalt transportation. Background technique [0002] Asphalt construction equipment is widely used in the construction or maintenance of highway traffic, municipal construction, and airport runways in my country. Asphalt gear pumps are key components of asphalt pumping systems for asphalt construction equipment. There are three main problems with existing asphalt gear pumps. One problem is that there are defects in the structural design of the active and passive gears. The first defect is that the shaft ends and teeth of the driving gear and the driven gear adopt a split structure, resulting in low overall strength and reduced service life. The second defect is that the tooth root is prone to narrow chip grooves Shallow, resulting in small particle size, especially in the application of rubber asphalt, which reduces the pumping capacity....

AI Technical Summary

Problems solved by technology

[0002] Asphalt construction equipment is widely used in the construction or maintenance of highway traffic, municipal construction, and airport runways in my country. Asphalt gear pumps are key components of asphalt pumping systems for asphalt construction equipment. There are three main problems with existing asphalt gear pumps. One problem is that there are defects in the structural design of the active and passive gears. The first defect is that the shaft ends and teeth of the driving gear and the driven gear adopt a split structure, resulting in low overall strength and reduced service life. The second defect is that the tooth root is prone to narrow chip grooves Shallow, resulting in small particle size, especially in the application of rubber asphalt, which reduces the pumping capacity. The third problem is that the heat conduction efficiency is low, especially during the construction process in the colder northern regions. When the equipment is shut down Start the equipment again after a period of time, the asphalt inside the asphalt pump has solidified, you need to use a heat conduction plate to melt the asphalt before starting the pump, low heat conduction efficiency will directly affect the use efficiency

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