Novel peristaltic pump head

[0014] Such as figure 1 The pump head of a new type of peristaltic pump shown includes a micro motor 1, a pump head base 2, a roller assembly 3, and a pump head upper cover 4. The upper surface of the pump head base 2 is provided with a groove. The roller assembly 3 is located in the groove of the pump head base 2, the pump head upper cover 4 is connected above the pump head base 2, and the roller assembly 3 is located in the pump head base 2 and the pump head upper cover 4, a through hole 14 is opened in the center of the groove, the output shaft end of the micro motor 1 passes through the through hole 14 to engage with the roller assembly 3, and the output shaft end of the micro motor 1 A first gear 13 is provided, the micro motor 1 is connected to the roller assembly 3 through the first gear 13, and one side of the upper cover 4 of the pump head is provided with two “U”-shaped inlet and outlet nozzles 11. A card slot 15 is provided on the side wall of the groove, a card head 16 is provided on the outside of the pump head upper cover 4, and the pump head upper cover 4 is connected to the pump by the cooperation of the card head 16 and the card slot 15. In the groove of the head base 2. Install the elastic hose into the pump head before work, so that the tube body of the elastic hose is in contact with the roller assembly 3, and the two ends of the elastic hose are respectively drawn from the two "U"-shaped inlet and outlet pipes on the upper cover 4 of the pump head. When the port 11 is extended, when fluid delivery is needed, the micro-micromotor 1 is started to rotate the roller assembly 3 through the first gear 13 and the roller assembly 3 is used to squeeze the elastic hose for fluid delivery. This design has the advantages of simple structure, easy manufacture, practicality and high efficiency.

[0015] Such as figure 2 The roller assembly 3 shown includes a lower roller bracket 5, a roller 8 with gears, and an upper roller bracket 6. The lower roller bracket 5 is provided with three uprights 9 and the upper roller bracket 6 is provided with three The three connecting holes corresponding to the upright 9 are fitted with a roller 8 with a gear on each of the three uprights 9, and the micro motor 1 is connected to the gear ends of the three rollers 8 through the first gear 13 respectively. Meshed. When the micro motor 1 is started, the micro motor 1 rotates with three geared rollers 8 through the first gear 13, and the lower bracket 5 and the upper bracket 6 of the roller will also rotate together under the action of inertia. The column 8 squeezes the elastic hose, and the elastic hose is used for fluid delivery. The roller 8 rotates while contacting the elastic hose, so that the elastic hose is pressurized by rolling friction instead of sliding friction. It reduces the abrasion of the elastic hose due to friction, which prolongs the service life of the hose and reduces the cost.

[0016] Such as figure 2 An annular baffle 10 is provided on the outside of the three geared rollers 8 shown, and the annular baffle 10 is located above the gear end of the roller 8. In this design, a ring-shaped baffle 10 is added between the gear end of the roller 8 and the elastic hose. The baffle 10 prevents the gear end of the roller 8 from causing damage to the elastic hose during rotation. Damage, thereby effectively protecting the elastic hose, reducing unnecessary losses.

[0017] Such as image 3 A clamping slot 12 is provided on the side wall of the shown "U"-shaped inlet and outlet nozzle 11. In this design, there are clamps on both ends of the elastic hose, and the clamp is clamped into the clamp groove 12 during installation, so that the elastic hose will not move with the rotation of the roller assembly 3, which improves the delivery of the peristaltic pump. The stability.