Quantitative distributor capable of changing material discharge

A quantitative dispenser refers to a device that discharges a predetermined volume of fluid (such as liquid or powder) and distributes the fluid to a desired location. There are two types of metering distributors; one metering distributor discharges substances when the pump is pressurized, and the other metering distributor discharges substances when the pump is decompressed. Both types discharge a predetermined amount of material through the full stroke movement of the piston. In the former pressurized discharge dispenser, the piston of the dispenser is pushed upward against the force of the elastic body. When the piston is pressurized by the substance, then the substance stored in the inner cavity of the cylinder is discharged. The volume of expelled material corresponds to the maximum distance of piston movement. Then the piston is pushed down by the elastic body. When the piston is decompressed, the substance is supplied and stored in the inner cavity of the cylinder. On the other hand, in the latter type of decompression type discharge distributor, the piston of the distributor is pushed upward against the force of the elastic body. When the piston is pressurized, then the substance is supplied and stored in the inner cavity of the cylinder. Because the piston is in full stroke motion, the volume of the substance is constant. When the piston is decompressed, the piston is pushed down by the elastic body, thereby expelling the substance stored in the inner cavity of the cylinder.



As described above, in the two types of quantitative dispensers, the moving distance of the piston is defined as a fixed length, so the volume of the metered or discharged substance and the volume of the supplied substance are determined as the fixed volume. In the above-mentioned prior art quantitative dispensers, it is necessary to replace the components that limit the movement distance of the piston, and when it is necessary to change the displacement or the dispensing volume, the volume of the substance stored in the inner cavity of the cylinder must be changed. So it is very inconvenient to change the displacement of the material.



Therefore, technicians provide a quantitative dispenser that can change the amount of substance discharged, including a cylinder, a piston placed in the cylinder, and an elastic body for pressurizing the piston, wherein the piston intermittently applies the substance to the dispenser to overcome The pressure of the elastic physical force moves, and the predetermined amount of substance discharged from the metering dispenser is determined by the moving distance of the piston in the cylinder, wherein the amount of substance discharged from the dispenser corresponds to the pressure of supplying the substance to the metering dispenser. The elastic body that pressurizes the piston may have a Young's modulus that varies according to the position of the piston. The elastic body may include a plurality of elastic elements arranged in series, and each elastic element has a Young's modulus different from each other. The elastic body may include a plurality of elastic elements arranged in parallel, so that the compression starting points of the elastic elements are the same as each other due to the difference in the position of the piston.





In addition, this technology provides a metering distributor, which includes a cylinder, a piston placed in the cylinder, and an elastic body for pressurizing the piston, wherein the piston is intermittently applied to the metering distributor to overcome the pressure of the elastic physical force The predetermined volume of the substance that moves and is discharged from the dispenser is determined by the movement distance of the piston in the cylinder, where since the movement distance of the piston exceeds the normal operation movement distance, the inflow and discharge end of the cylinder cavity separated from each other by the pistons The ends communicate with each other, so that the pipe for supplying the substance to the metering dispenser communicates with the discharge port of the dispenser. In the case where the movement distance of the piston exceeds the movement distance of the normal operation, by enlarging the inner diameter of the cylinder, the inflow end and the discharge end of the cylinder cavity separated from each other by the piston can communicate with each other.