阅读说明：本技术 一种压紧式精密流量控制机构 (Accurate flow control mechanism of pressing mode ) 是由 罗勇 张仁钦 陈红梅 林正得 叶辰 朱晓明 于 2020-11-09 设计创作，主要内容包括：本发明公开了一种压紧式精密流量控制机构,包含基座、环座、浮动部件、弹片、垫片和电磁线圈；所述弹片位于基座的上方,电磁线圈位于弹片的上侧,环座和浮动部件位于基座与弹片之间,浮动部件位于环座的内侧,基座上设置有流道孔；所述弹片的下表面与浮动部件的顶部紧密配合,垫片固定设置在基座的上侧或浮动部件的下侧,电磁线圈不通电时,浮动部件压紧垫片；本方案取消了浮动部件与弹片之间的间隙,直接将浮动部件与弹片紧密配合,不通电时,浮动部件可以压紧垫片,保证气密性；而工作时,浮动部件通过电磁阀的磁吸力向上压迫弹片,克服弹片的弹力,使浮动部件的开度就等于弹片沿竖向的变形量,这样可以提高微小流量控制的稳定性。(The invention discloses a compression type precise flow control mechanism which comprises a base, a ring seat, a floating component, an elastic sheet, a gasket and an electromagnetic coil, wherein the ring seat is arranged on the base; the elastic sheet is positioned above the base, the electromagnetic coil is positioned on the upper side of the elastic sheet, the ring seat and the floating component are positioned between the base and the elastic sheet, the floating component is positioned on the inner side of the ring seat, and the base is provided with a flow passage hole; the lower surface of the elastic sheet is tightly matched with the top of the floating component, the gasket is fixedly arranged on the upper side of the base or the lower side of the floating component, and when the electromagnetic coil is not electrified, the floating component compresses the gasket; the scheme cancels the gap between the floating component and the elastic sheet, the floating component is directly and tightly matched with the elastic sheet, and when the power is not on, the floating component can compress the gasket to ensure the air tightness; and during operation, the floating component upwards oppresses the shell fragment through the magnetic attraction of solenoid valve, overcomes the elasticity of shell fragment, makes the aperture of floating component just equal the shell fragment along vertical deflection, can improve small flow control's stability like this.)

1. The utility model provides a precision flow control mechanism of pressing mode which characterized in that: comprises a base (1), a ring seat (2), a floating component (3), an elastic sheet (4), a gasket (5) and an electromagnetic coil (6); the elastic sheet (4) is positioned above the base (1), the electromagnetic coil (6) is positioned on the upper side of the elastic sheet (4), the ring seat (2) and the floating component (3) are positioned between the base (1) and the elastic sheet (4), the floating component (3) is positioned on the inner side of the ring seat (2), and the base (1) is provided with a flow passage hole (7); the lower surface of the elastic sheet (4) is tightly matched with the top of the floating component (3), the gasket (5) is fixedly arranged on the upper side of the base (1) or the lower side of the floating component (3), and when the electromagnetic coil (6) is not electrified, the floating component (3) compresses the gasket (5).

2. A hold down precision flow control mechanism according to claim 1, wherein: and a backing ring (8) is arranged between the electromagnetic coil (6) and the elastic sheet (4).

3. A hold down precision flow control mechanism according to claim 1, wherein: the outer circumference of the upper side of the base (1) is provided with a plurality of arc-shaped retaining walls, the upper surfaces of the arc-shaped retaining walls are flush, the ring seat (2) falls on the arc-shaped retaining walls, and fluid circulation opening structures are formed between the adjacent arc-shaped retaining walls.

4. A hold down precision flow control mechanism according to claim 1, wherein: the gasket (5) is a flexible gasket, and when the electromagnetic coil (6) is not electrified, the floating component (3) compresses the gasket (5) and enables the gasket (5) to generate elastic deformation.

Technical Field

The invention relates to a compression type precise flow control mechanism.

Background

The electromagnetic valve is a main part for controlling the flow of fluid, generally attracts a magnetic core through an electromagnetic coil, and controls the flow through the opening of the magnetic core; the existing electromagnetic valve is not reasonable enough in structure, so that the air inlet structure is not stable enough, and the flow control precision is influenced.

The applicant has applied a small flow control mechanism and optimized solutions in the past, including the basic solenoid, base, ring seat, float, spring and spacer configurations; when the electromagnetic coil is not electrified, a certain gap is formed between the floating component and the elastic sheet, and the height of the gap is the reserved opening of the floating component; in actual testing, this gap was found to lead to operational instability.

Disclosure of Invention

The invention aims to overcome the defects of the prior art and provide a pressing type precise flow control mechanism.

In order to achieve the purpose, the invention adopts the technical scheme that: a compact precise flow control mechanism comprises a base, a ring seat, a floating component, an elastic sheet, a gasket and an electromagnetic coil; the elastic sheet is positioned above the base, the electromagnetic coil is positioned on the upper side of the elastic sheet, the ring seat and the floating component are positioned between the base and the elastic sheet, the floating component is positioned on the inner side of the ring seat, and the base is provided with a flow passage hole; the lower surface of the elastic sheet is tightly matched with the top of the floating component, the gasket is fixedly arranged on the upper side of the base or the lower side of the floating component, and when the electromagnetic coil is not electrified, the floating component compresses the gasket.

Preferably, a backing ring is arranged between the electromagnetic coil and the elastic sheet.

Preferably, a plurality of arc-shaped retaining walls are arranged on the outer circumference of the upper side of the base, the upper surfaces of the arc-shaped retaining walls are flush, the ring is seated on the arc-shaped retaining walls, and a fluid circulation opening structure is formed between the adjacent arc-shaped retaining walls.

Preferably, the gasket is a flexible gasket, and when the electromagnetic coil is not electrified, the floating component presses the gasket and enables the gasket to generate elastic deformation.

Due to the application of the technical scheme, compared with the prior art, the invention has the following advantages:

the scheme optimizes the structure of valve air inlet control, cancels the gap between the floating component and the elastic sheet, directly and tightly matches the floating component with the elastic sheet, and when the valve is not electrified, the floating component can compress the gasket to ensure air tightness; and during operation, the floating component upwards oppresses the shell fragment through the magnetic attraction of solenoid valve, overcomes the elasticity of shell fragment, makes the aperture of floating component just equal the shell fragment along vertical deflection, can improve small flow control's stability like this.

Drawings

The technical scheme of the invention is further explained by combining the accompanying drawings as follows:

FIG. 1 is a schematic structural diagram of one embodiment of a compression-type precision flow control mechanism according to the present invention;

fig. 2 is a schematic structural diagram of another embodiment of a compression-type precise flow control mechanism according to the present invention.

Detailed Description

The invention is described in further detail below with reference to the figures and the embodiments.

As shown in fig. 1-2, the present invention provides a pressing type precise flow control mechanism, which comprises a base 1, a ring seat 2, a floating component 3, a spring plate 4, a gasket 5 and an electromagnetic coil 6; the elastic sheet 4 is positioned above the base 1, the electromagnetic coil 6 is positioned on the upper side of the elastic sheet 4, the ring seat 2 and the floating component 3 are positioned between the base 1 and the elastic sheet 4, the floating component 3 is positioned on the inner side of the ring seat 2, and the base 1 is provided with a flow passage hole 7.

A plurality of arc-shaped retaining walls are arranged on the outer circumference of the upper side of the base 1, the upper surfaces of the arc-shaped retaining walls are flush, the ring seat 2 falls on the arc-shaped retaining walls, and a fluid circulation opening structure is formed between the adjacent arc-shaped retaining walls; of course, the base 1 may be provided with no arc-shaped retaining wall structure, and the fluid flow opening structure is transferred to the lower end of the ring seat 2.

The floating component 3 can be a thin sheet or other shapes, the periphery of the floating component 3 is in clearance fit with the inner wall of the ring seat 2, and the ring seat 2 plays a certain guiding role in the lifting of the floating component 3; the lower surface of the elastic sheet 4 is tightly matched with the top of the floating component 3, the upper part of the floating component 3 is provided with a bulge, and the bulge part can be a round table or a frustum structure, so that the floating component 3 can press the elastic sheet 4 more easily.

The gasket 5 is fixedly arranged on the upper side of the base 1 or the lower side of the floating component 3, and the gasket 5 is partially buried in the base 1 or the floating component 3 so as to improve the mounting strength of the gasket and can be reinforced by a way of slotting and filling glue; the gasket 5 is a flexible gasket made of teflon, nitrile rubber, silica gel and the like, and when the electromagnetic coil 6 is not electrified, the floating component 3 compresses the gasket 5 and enables the gasket 5 to generate elastic deformation.

A backing ring 8 can be arranged between the electromagnetic coil 6 and the elastic sheet 4, the elastic sheet 4 is provided with a space capable of bending upwards, the height of the backing ring 8 is generally not higher than 800 micrometers, the wall thickness is preferably equal to that of the ring seat 2, and the stability of flow change can be improved.

After the electromagnetic coil is electrified, an upward magnetic attraction force is generated on the floating component 3, the floating component 3 moves upwards and presses the elastic sheet 4 at the same time, so that the elastic sheet 4 generates a downward elastic force on the floating component 3, and when fluid passes between the floating component 3 and the base 1, a downward Bernoulli force is generated on the floating component 3 due to the Bernoulli effect; in the initial stage of the floating component 3 rising, the gasket 5 can also generate upward deformation restoring acting force on the floating component 3; the current of the electromagnetic coil changes to change the magnetic attraction force, thereby controlling the opening of the floating component 3; different flow rates can be generated by different opening degrees, so that the effect of precisely controlling the micro flow rate is achieved; typically, the opening of the floating member is no greater than 800 microns.

The above-mentioned embodiments are merely illustrative of the technical idea and features of the present invention, and the purpose thereof is to enable those skilled in the art to understand the contents of the present invention and implement the present invention, and not to limit the scope of the present invention, and all equivalent changes or modifications made according to the spirit of the present invention should be covered in the scope of the present invention.