Microfluid pump

[0034] The screw 71 of the present invention is a single-turn reciprocating screw. The second embodiment of the present invention uses a unidirectional motor and a single-rotation reciprocating screw to cooperate to form a driving mechanism. The structure of the single-rotation reciprocating screw is not provided with a double helix on the rod body, and a connecting double is provided at the end of the rod body. The spiral connecting part, when the blade rotates from one spiral track to the end of the rod body, the blade passes through the connecting part and enters the other spiral track to move backwards, so that the blade moves back and forth.

[0035] In the present invention, a guide cylinder 9 is provided in the pump body 1, and the blade 3 is made of iron. The blade 3 is sleeved on the guide cylinder 9 and dynamically sealed with the outer wall of the guide cylinder 9. The rod 71 is arranged in the guide cylinder 9, and a magnetic sheet 100 capable of attracting the synchronous movement of the blade 3 is provided at a position corresponding to the screw rod 71 and the blade 3, and the magnetic sheet 100 is screwed on the screw rod 71. In the third embodiment of the present invention, a guide cylinder 9 is provided at the inner axis of the pump body 1, and a closed space is formed between the outer wall of the guide cylinder 9 and the inner wall of the pump body 1 and the outer wall of the vane 3, and the vane 3 and the guide cylinder 9 The outer wall is dynamically sealed. When the drive motor drives the screw rod to rotate, the magnetic sheet 10 rotates and translates on the screw rod, and the blade 3 moves synchronously with the magnetic sheet 10 under the suction force of the magnetic sheet 10, thereby moving back and forth on the guide cylinder 9 .

[0036] The driving mechanism 7 of the present invention includes electromagnets 73 respectively arranged on the ends of the pump body 1, and the blades 3 are iron blades. The fourth embodiment of the present invention uses an electromagnet and an iron blade to cooperate with each other. When the electromagnet at one end of the pump body is conductive to generate a magnetic force, the blade will be attracted to move. When it moves to the end of the pump body, the electromagnet at this end loses The electricity stops working, and at the same time the electromagnet at the other end is energized, the blade receives the reverse attraction and moves in the reverse direction, so back and forth to achieve the pumping function.

[0037] The two ends of the vane 3 of the present invention form a sealed space with the two ends of the pump body. In the fifth embodiment of the present invention, a sealed space is formed between one end of the blade 3 and one end of the pump body. A set of fluid inlets and fluid outlets are provided on the same side of the blade 3 and corresponding to the sealed space. The other end of the pump body may be open. When the blade 3 moves, the blade always forms a sealed space with one end of the pump body. In the sixth embodiment of the present invention, a sealed space is formed between the two ends of the vane 3 and the two ends of the pump body. A set of fluid inlets and fluid outlets are respectively provided at both ends of the pump body, for example, on the pump body on the left side of the vane 3 A first fluid inlet 40 and a first fluid outlet 50 communicating with the left enclosed space are provided, and a second fluid inlet 41 and a second fluid outlet 51 communicating with the right enclosed space are provided on the pump body 1 on the right side of the vane 3 . In this embodiment, the first fluid inlet 40 and the second fluid inlet 41 may communicate with each other through a fluid input pipe, and the first fluid outlet 50 and the second fluid outlet 51 may communicate with each other through a fluid output pipe.

[0038] The fluid inlet 4 of the present invention is connected to the fluid input pipe 10, the first one-way valve 6 is arranged on the fluid input pipe 10, the fluid outlet 5 is connected to the fluid output pipe 11, and the second one-way valve The valve 8 is provided in the fluid output pipe 11.

[0039] The first one-way valve 6 of the present invention is arranged in the fluid inlet 4, and the second one-way valve 8 is arranged in the fluid outlet 5. The arrangement of the second check valve 8 and the first check valve 6 in the present invention includes the above two types, which can be flexibly set according to actual usage conditions.

[0040] In the present invention, a limit end cover 12 is provided at the end of the screw rod.

[0041] In the description of the present invention, it should be understood that the terms “first” and “second” are only used for description purposes, and cannot be understood as indicating or implying relative importance or implicitly indicating the number of indicated technical features. Thus, the features defined with "first" and "second" may explicitly or implicitly include one or more of these features.