A small precision flow control valve with elastic gasket

Abstract

The present invention discloses a small precision flow control valve with an elastic gasket, comprising an electromagnetic coil, a base, a ring seat, a movable plate and a spring; the spring plate is located above the base, the ring seat and the movable plate are located between the base and the spring plate, the movable plate is located on the inner side of the ring seat, an elastic gasket is arranged between the movable plate and the spring plate, and the elastic gasket is fixedly arranged on the upper surface of the movable plate or the lower surface of the spring plate; the electromagnetic coil is located on the upper side of the spring plate, the electromagnetic coil generates an upward suction force on the movable plate, and the spring plate generates a downward elastic force on the movable plate; this solution optimizes the structure of the valve intake control, and an elastic gasket is arranged between the movable plate and the spring plate, so that when the movable plate is adsorbed by the electromagnetic coil, the upper surface of the movable plate will not directly collide with the lower surface of the spring plate, thereby avoiding noise; and after the elastic gasket is arranged, the movable plate will generate a small elastic force on the movable plate before pressing the spring plate, which is beneficial to the control of the valve under small opening conditions.

Description

Technical Field

[0001] The invention relates to a small precision flow control valve with an elastic gasket. 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.

[0003] Recently, the applicant applied for a micro-flow valve control mechanism, which includes a basic electromagnetic coil, base, ring seat, movable plate and spring structure. However, during testing, it was found that when the movable plate was adsorbed by the electromagnetic coil, the upper surface of the movable plate would directly collide with the lower surface of the spring, making noise. Especially in the scenario where the valve is frequently opened and closed, continuous noise will be emitted, affecting the quality of the valve operation. Summary of the Invention

[0004] The object of the present invention is to provide a small precision flow control valve with an elastic gasket in order to overcome the deficiencies of the prior art.

[0005] To achieve the above-mentioned purpose, the technical solution adopted by the present invention is: a small precision flow control valve with an elastic gasket, 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 an elastic gasket is arranged between the movable plate and the spring, and the elastic gasket is fixedly arranged on the upper surface of the movable plate or the lower surface of the spring; 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.

[0006] Preferably, a sealing ring is provided between the moving plate and the base, and the sealing ring is fixedly provided on the upper surface of the base or the lower surface of the moving plate.

[0007] 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.

[0008] Preferably, the outer circumference of the moving plate is loosely matched with the inner wall of the ring seat.

[0009] Preferably, when the electromagnetic coil generates an upward suction force on the movable plate, the distance between the movable plate and the base is the valve opening D, D=D1+D2; D1 is the maximum rising displacement distance of the movable plate before it 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.

[0010] Preferably, the height of the ring seat is H1, the thickness of the moving plate is H2, the thickness of the elastic gasket is H3, and H1=H2+H3+D1.

[0011] Preferably, a plurality of flow channel holes with uniform intervals are provided at the center of the base.

[0012] Due to the application of the above technical solution, the present invention has the following advantages compared with the prior art:

[0013] This solution optimizes the structure of the valve intake control. An elastic gasket is set between the movable plate and the spring, so that when the movable plate is adsorbed by the electromagnetic coil, the upper surface of the movable plate will not directly collide with the lower surface of the spring, thereby avoiding noise. After the elastic gasket is set, the movable plate will generate a small elastic force on the movable plate before pressing the spring, which is beneficial to the control of the valve under small opening conditions. BRIEF DESCRIPTION OF THE DRAWINGS

[0014] The technical solution of the present invention will be further described below with reference to the accompanying drawings:

[0015] Attachment Figure 1 Schematic diagram of a small precision flow control valve with an elastic gasket according to the present invention;

[0016] Attachment Figure 2 This is a schematic diagram of the top view of the base according to the present invention;

[0017] Attachment Figure 3 It is a schematic diagram of the force structure of the moving piece described in the present invention. DETAILED DESCRIPTION

[0018] The present invention will be further described in detail below with reference to the accompanying drawings and specific embodiments.

[0019] like Figure 1-3 As shown, the present invention describes a small precision flow control valve with an elastic gasket, comprising 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, the ring seat 2 and the movable plate 3 are located between the base 1 and the spring 4, and both the movable plate 3 and the spring 4 are 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; an elastic gasket 6 is provided between the movable plate 3 and the spring 4, and the elastic gasket 6 is fixedly provided on the upper surface of the movable plate 3 or the lower surface of the spring 4.

[0020] A plurality of evenly spaced flow channel holes 7 are provided at the center of the base 1 to improve the uniformity of medium distribution and the stability of flow. A plurality of arc-shaped retaining walls are provided on the outer circumference of the upper side of the base 1. 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.

[0021] The electromagnetic coil is located on the upper side of the elastic piece 4. After 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 first compress the elastic gasket 6, so that the elastic gasket 6 generates a downward elastic force F4 on the movable piece 3, and then compress 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+F4; the current of the electromagnetic coil changes to change the magnetic attraction force F1, and F1 overcomes F2, F3 and F4 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.

[0022] When the electromagnetic coil generates an upward magnetic attraction force on the movable plate 3, the distance between the movable plate 3 and the base 1 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 200 microns.

[0023] The height of the ring seat 2 is H1, the thickness of the moving plate 3 is H2, and the thickness of the elastic gasket 6 is H3. H1=H2+H3+D1. The ring seat 2 can be designed according to this formula during processing.

[0024] The base 1 may also be provided with a sealing ring 5 that cooperates with the movable plate 3. In this case, the height of the ring seat 2 needs to be included in the calculation of the thickness of the sealing ring 5. However, since the sealing ring 5 is generally partially buried in the base 1, the thickness of the sealing ring 5 here refers to the height of the sealing ring 5 above the mating surface of the ring seat 2 and the base 1; the sealing ring 5 needs to have a structure that avoids the flow channel hole 7, and the outer circumference of the sealing ring 5 needs to be located outside the outermost circle flow channel hole 7. When the electromagnetic coil is not energized, the movable plate 3 falls on the sealing ring 5 to close the flow channel on the base 1. The sealing ring 5 can be made of Teflon, nitrile rubber, silicone or other materials.

[0025] Of course, the sealing ring 5 can also be fixedly arranged on the lower surface of the moving plate 3, and then there is no need to provide a structure for avoiding the flow channel hole 7 on the sealing ring 5.

[0026] 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.

[0027] 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 small precision flow control valve with an elastic gasket, 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), an elastic gasket (6) is provided between the movable plate (3) and the spring plate (4), and the elastic gasket (6) is fixedly provided on the upper surface of the movable plate (3) or the lower surface of the spring plate (4); 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 base (1) 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 small precision flow control valve with elastic gasket according to claim 1, characterized in that: A sealing ring (5) is provided between the moving plate (3) and the base (1), and the sealing ring (5) is fixedly provided on the upper surface of the base (1) or the lower surface of the moving plate (3).

3. The small precision flow control valve with elastic gasket 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.

4. The small precision flow control valve with elastic gasket 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 thickness of the elastic gasket (6) is H3, where H1=H2+H3+D1.

5. The small precision flow control valve with elastic gasket according to claim 1, characterized in that: A plurality of evenly spaced flow channel holes (7) are provided at the center of the base (1).

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