A micro-flow valve control mechanism

Abstract

The present invention discloses a micro-flow valve control mechanism, comprising an electromagnetic coil, a base, a ring seat, a movable plate and a spring; the spring is located above the base, the ring seat and the movable plate are located between the base and the spring, the movable plate is located on the inner side of the ring seat, and a sealing ring that cooperates with the movable plate is provided on the base; the electromagnetic coil is located on the upper side of the spring; this scheme optimizes the structure of the valve intake control, and the ring seat plays a certain guiding role in the lifting and lowering of the movable plate, ensuring that the movable plate will not be deflected during the intake process, so that the outer ring on the lower side of the movable plate can intake air evenly, ensuring the stability of the solenoid valve operation; the electromagnetic coil generates an upward suction force on the movable plate, and the spring generates a downward elastic force on the movable plate, and the height of the movable plate can be fine-tuned by changing the coil current, thereby changing the valve opening; the sealing ring on the base can ensure the valve sealing after the coil is powered off.

Description

Technical Field

[0001] The invention relates to a micro-flow valve control mechanism. Background Art

[0002] The solenoid valve is the main component for fluid flow control. The solenoid valve generally attracts the magnetic core through the electromagnetic coil and controls the flow rate by the opening of the magnetic core. The existing solenoid valve structure is not reasonable enough, resulting in an unstable intake structure and affecting the accuracy of flow control. Summary of the Invention

[0003] The purpose of the present invention is to provide a micro-flow valve control mechanism in order to overcome the deficiencies of the prior art.

[0004] To achieve the above-mentioned purpose, the technical solution adopted by the present invention is: a micro-flow valve control mechanism, comprising an electromagnetic coil, a base, a ring seat, a movable plate and a spring; the spring is located above the base, the ring seat and the movable plate are located between the base and the spring, the movable plate is located on the inner side of the ring seat, and a sealing ring is provided on the base to cooperate with the movable plate; the electromagnetic coil is located on the upper side of the spring, the electromagnetic coil generates an upward suction force on the movable plate, and the spring generates a downward elastic force on the movable plate.

[0005] Preferably, a plurality of arcuate retaining walls are provided on the outer circumference of the upper side of the base, the upper surfaces of the plurality of arcuate retaining walls are flush, the ring seat rests on the arcuate retaining walls, and an air intake opening structure is formed between adjacent arcuate retaining walls.

[0006] Preferably, the outer circumference of the moving plate is loosely matched with the inner wall of the ring seat.

[0007] Preferably, when the electromagnetic coil generates an upward suction force on the movable plate, the distance between the movable plate and the sealing ring is the valve opening D, D=D1+D2; D1 is the maximum upward displacement distance of the movable plate before the movable plate contacts the elastic plate; D2 is the deformation amount of the elastic plate in the vertical direction after the movable plate contacts the elastic plate.

[0008] Preferably, the height of the ring seat is H1, the thickness of the moving plate is H2, and the height of the sealing ring is H3, where H1=H2+H3+D1.

[0009] Due to the application of the above technical solution, the present invention has the following advantages compared with the prior art:

[0010] This solution optimizes the structure of the valve intake control. A ring seat is set outside the rotor. The ring seat plays a certain guiding role in the lifting and lowering of the rotor, ensuring that the rotor will not deflect during the intake process, so that the outer ring on the lower side of the rotor can intake air evenly, ensuring the stability of the solenoid valve operation; the electromagnetic coil generates an upward suction force on the rotor, and the spring generates a downward elastic force on the rotor. The height of the rotor can be fine-tuned by changing the coil current, thereby changing the valve opening; a sealing ring that cooperates with the rotor is provided on the base to ensure the valve sealing after the coil is powered off. BRIEF DESCRIPTION OF THE DRAWINGS

[0011] The technical solution of the present invention will be further described below with reference to the accompanying drawings:

[0012] Attachment Figure 1 A schematic diagram of a micro-flow valve control mechanism according to the present invention;

[0013] Attachment Figure 2 It is a schematic diagram of the force structure of the moving piece described in the present invention. DETAILED DESCRIPTION

[0014] The present invention will be further described in detail below with reference to the accompanying drawings and specific embodiments.

[0015] like Figure 1-2 As shown, a micro-flow valve control mechanism described in the present invention includes an electromagnetic coil, a base 1, a ring seat 2, a movable plate 3 and a spring 4; the spring 4 is located above the base 1, and the ring seat 2 and the movable plate 3 are located between the base 1 and the spring 4, and the movable plate 3 and the spring 4 are both circular thin plate structures; the movable plate 3 is located on the inner side of the ring seat 2, and the outer circumference of the movable plate 3 is gap-matched with the inner wall of the ring seat 2, so that the ring seat 2 can play a certain guiding role in the lifting and lowering of the movable plate 3; a sealing ring 5 is provided on the base 1 to cooperate with the movable plate 3, and the flow channel hole on the base 1 is located on the inner ring of the sealing ring 5. When the electromagnetic coil is not energized, the movable plate 3 falls on the sealing ring 5 to close the flow channel hole on the base 1. The sealing ring 5 can be made of Teflon, nitrile rubber, silicone or the like.

[0016] A plurality of arc-shaped retaining walls are provided on the outer circumference of the upper side of the base 1, and the upper surfaces of the plurality of arc-shaped retaining walls are flush. The ring seat 2 falls on the arc-shaped retaining walls, and an air intake opening structure is formed between adjacent arc-shaped retaining walls. Of course, the base 1 may also not be designed with an arc-shaped retaining wall structure, and the air intake opening structure may be transferred to the lower end of the ring seat 2, but the air intake opening structure must be lower than the lower surface of the moving plate 3.

[0017] The electromagnetic coil is located on the upper side of the elastic piece 4. When the electromagnetic coil is energized, it generates an upward magnetic attraction force F1 on the movable piece 3. After the movable piece 3 moves upward, it will press the elastic piece 4, so that the elastic piece 4 generates a downward elastic force F2 on the movable piece 3. When the fluid passes between the movable piece 3 and the base 1, it will generate a downward force F3 on the movable piece 3 due to the Bernoulli effect, F1=F2+F3; the current of the electromagnetic coil changes to change the magnetic attraction force F1, and F1 overcomes F2 and F3 to control the opening of the movable piece 3; different openings will produce different flow rates, achieving the effect of precise control of small flow rates.

[0018] When the electromagnetic coil generates an upward magnetic attraction on the movable plate 3, the distance between the movable plate 3 and the sealing ring 5 is the valve opening D, D=D1+D2; D1 is the maximum upward displacement distance of the movable plate 3 before it contacts the elastic plate 4; D2 is the deformation amount of the elastic plate 4 in the vertical direction after the movable plate 3 contacts the elastic plate 4; under normal circumstances, D1 and D2 are not greater than 15 microns.

[0019] The height of the ring seat 2 is H1, the thickness of the movable plate 3 is H2, and the height of the sealing ring 5 is H3. H1=H2+H3+D1. The ring seat 2 can be designed according to this formula during processing. However, since the sealing ring 5 is generally partially buried in the base 1, the height H3 of the sealing ring 5 mentioned in the formula refers to the height of the sealing ring 5 above the mating surface of the ring seat 2 and the base 1.

[0020] For the sake of convenience in illustration, the components are slightly separated in the figure. In reality, the lower side of the ring seat 2 should be in close contact with the base 1 , and the spring 4 should be pressed against the upper side of the ring seat 2 by the electromagnetic coil.

[0021] The above embodiments are only for illustrating the technical concept and features of the present invention. Their purpose is to enable people familiar with this technology to understand the content of the present invention and implement it. They are not intended to limit the scope of protection of the present invention. Any equivalent changes or modifications made according to the spirit of the present invention should be included in the scope of protection of the present invention.

Claims

1. A micro-flow valve control mechanism, characterized by: The invention comprises an electromagnetic coil, a base (1), a ring seat (2), a movable plate (3) and a spring plate (4); the spring plate (4) is located above the base (1), the ring seat (2) and the movable plate (3) are located between the base (1) and the spring plate (4), the movable plate (3) is located on the inner side of the ring seat (2), and a sealing ring (5) is provided on the base (1) to cooperate with the movable plate (3); the electromagnetic coil is located on the upper side of the spring plate (4), the electromagnetic coil generates an upward suction force on the movable plate (3), and the spring plate (4) generates a downward elastic force on the movable plate (3); The outer circumference of the movable plate (3) is clearance-matched with the inner wall of the ring seat (2); when the electromagnetic coil generates an upward suction force on the movable plate (3), the distance between the movable plate (3) and the sealing ring (5) is the valve opening D, where D=D1+D2; D1 is the maximum upward displacement distance of the movable plate (3) before the movable plate (3) contacts the elastic plate (4); and D2 is the deformation amount of the elastic plate (4) generated in the vertical direction after the movable plate (3) contacts the elastic plate (4).

2. The micro-flow valve control mechanism according to claim 1, characterized in that: A plurality of arcuate retaining walls are provided on the outer circumference of the upper side of the base (1), the upper surfaces of the plurality of arcuate retaining walls are flush, the annular seat (2) falls on the arcuate retaining walls, and an air intake opening structure is formed between adjacent arcuate retaining walls.

3. The micro-flow valve control mechanism according to claim 1, characterized in that: The height of the ring seat (2) is H1, the thickness of the moving plate (3) is H2, and the height of the sealing ring (5) is H3, where H1=H2+H3+D1.

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