Vein transfusion device regulating valve with nonlinear compensation

Abstract

The invention discloses a vein transfusion device regulating valve with a nonlinear compensation. The vein transfusion device regulating valve with the nonlinear compensation comprises a lead screw, a nut, a rolling wheel and a shell. The two side faces of the shell are each provided with two grooved rails symmetrically, one grooved rail is a straight-line grooved rail, the other grooved rail is a curved-line grooved rail, and the straight-line grooved rail is located above the curved-line grooved rail; the lead screw is installed in the shell and can rotate around the axis of the lead screw, the nut is installed on the lead screw in a sleeving mode, the displacement of the nut is driven by the rotation of the lead screw, the two sides of the lower end of the nut are each provided with a protruding block, and the two protruding blocks can be embedded in the straight-line grooved rails on the two sides of the shell; the rolling wheel is connected with the nut, the middle of the rolling wheel presses a transfusion tube which passes through the shell, the two ends of the rolling wheel are embedded in the curved-line grooved rails on the two sides of the shell, the rolling wheel moves along with the nut and along tracks of the curved-line grooved rails, and the effect for controlling the opening degree of the transfusion tube is achieved. The vein transfusion device regulating valve with the nonlinear compensation can make a variation relationship between the displacement of the rolling wheel and liquid velocities be a linear variation relationship, an automatic transfusion control device can control the liquid velocities conveniently, and therefore the accurate control over the transfusion velocities can be achieved.

Description

technical field [0001] The invention relates to the technical field of regulating the infusion speed of an intravenous infusion set, in particular to a regulating valve for an intravenous infusion set with nonlinear compensation. Background technique [0002] At present, the traditional intravenous infusion in the hospital adopts the method of gravity for infusion, and the speed of infusion is adjusted by the regulating valve on the infusion tube. The regulating valve clamps or loosens the infusion tube by moving the roller up and down, that is, changes the opening of the valve, reduces or increases the cross-sectional area of ​​the infusion tube, thereby controlling the infusion speed. There is a linear relationship between the displacement of the roller on the groove and the opening of the valve. However, data obtained through experiments show that the relationship between the displacement of the roller and the change of droplet velocity presents a strong nonlinear relati...

AI Technical Summary

Problems solved by technology

Moreover, the small movement of the roller will bring about a large change in the infusion speed, which makes it difficult to use the regulating valve to control the liquid speed more accurately.

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