56results about How to "Increase extrusion area" patented technology

The invention belongs to the technical field of agricultural equipment, and is specifically a kind of equipment for controlling diseases and insect pests of agricultural and forestry crops, including a car body, a water pipe and a spraying assembly; block, tank and hose. The driving unit is used for the movement of the vehicle body; the swing unit is used for uniform spraying of the spraying assembly. Through the mutual cooperation between the driving unit and the swing unit, on the one hand, the agricultural and forestry crops are sprayed with the pesticide solution according to the actual situation, and the spraying is uniform, so as to avoid the damage of the agricultural and forestry crops by the pests and diseases, thereby improving the effect of the prevention and control of the agricultural and forestry pests and diseases; On the one hand, the power source of the agricultural and forestry pest control equipment is utilized, thereby improving the utilization rate of resources, and at the same time reducing the external power equipment, thereby reducing the manufacturing cost of the agricultural and forestry pest control equipment.

The invention discloses a shape memory alloy micro valve based on acoustic surface waves and a control method of the shape memory alloy micro valve. The shape memory alloy micro valve comprises a PCB, an acoustic surface wave excitation device, a PDMS coagulating body with a micro-channel and a shape memory alloy line formed by a first crooked section at the indoor temperature and a second straight section at the indoor temperature; the acoustic surface wave excitation device and the PDMS coagulating body are installed on the PCB, a groove is formed in the PDMS coagulating body, and the other end of the shape memory alloy line is connected with the PCB; the section, stretching across a propagation path of the acoustic surface waves excited by the acoustic surface wave excitation device and located on the propagation path, of the shape memory alloy line is covered with paroline micro liquid on the propagation path; and the second section of the shape memory alloy line is sleeved with a guide pipe connected with the PCB, and a plastic sheet is connected to the other end of the second section of the shape memory alloy line and extrudes a part, located between the groove and the micro-channel, of the PDMS coagulating body and the under pushing force to deform so as to block the micro-channel. The shape memory alloy micro valve has the beneficial effects of being simple in structure, small in size and easy to integrate.

The invention relates to a reinforcing steel bar and a processing method thereof, in particular to a high-strength reinforcing steel bar with spiral fins and a processing method of the high-strength reinforcing steel bar. The high-strength reinforcing steel bar consists of following components including, in weight percentage, from 0.25 to 0.4% of C, from 0.1 to 0.2% of Si, from 0.3 to 0.45% of Mn, from 0.04 to 0.05% of Nb, from 0.08 to 0.09% of Cr, from 0.01 to 0.04% of V, from 0.002 to 0.003% of B, from 0.001 to 0.003% of Mo, from 0.015 to 0.03 of Al, from 0.002 to 0.003% of S, from 0.008 to0.009% of Ti, from 0.004 to 0.005% of Ni, from 3 to 5% of composite rear earth and the balance Fe. The processing method includes using a roll to roll a reinforcing steel bar into a reinforcing steelbar with the continuous spiral fins on the surface in a hot state; feeding the reinforcing steel bar with the continuous spiral fins on the surface after hot rolling into a heating furnace and heating the reinforcing steel bar to the temperature of 880-990 DEG C; then fast cooling the reinforcing steel bar to the temperature of 650-680 DEG C by an online cooling device via compressed air or vaporous quenching liquid; quenching in a quenching device by water or quenching liquid for 15-25 seconds; and tempering after heating the reinforcing steel bar to the temperature of 500-550 DEG C via a tempering heating furnace. The high-strength reinforcing steel bar with the spiral fins has a good anchoring property, fine ductility and a high yielding-to-tensile ratio.