A double-elastic precision flow control mechanism

Abstract

The present invention discloses a double-elastic precision flow control mechanism, comprising a base, a valve cover, a dynamic magnetic valve core, a spring, a spring and an electromagnetic assembly; a flow channel and a flow channel nozzle are provided on the base, the valve cover is provided on the base, the dynamic magnetic valve core passes through the valve cover, the upper end of the dynamic magnetic valve core cooperates with the electromagnetic assembly, the lower end of the dynamic magnetic valve core cooperates with the flow channel nozzle, the spring is located in the valve cover, and the spring is provided on the base; when the dynamic magnetic valve core is pressed on the flow channel nozzle, the flow channel is closed, and the dynamic magnetic valve core compresses the spring downward; when the dynamic magnetic valve core moves upward away from the flow channel nozzle, the flow channel flows, and the dynamic magnetic valve core squeezes the spring upward; the dynamic magnetic valve core of this scheme reduces the starting voltage for controlling the opening of the dynamic magnetic valve core through the dual elastic action of the spring and the spring, reduces energy consumption, has a smooth opening and closing action, and has small hysteresis; the overall structure is simple and novel, does not require a complex pilot hole structure, and the dynamic magnetic valve core adopts a columnar structure to cooperate with the electromagnetic assembly, which can accurately control the flow rate in the range of 0-120SLPM.

Description

Technical Field

[0001] The invention relates to a double-elastic precision flow control mechanism, belonging to the technical field of micro-flow control. 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 component and controls the flow 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] The applicant has previously applied for some miniature flow control mechanisms, as well as some optimized solutions, including basic electromagnetic components, bases, valve covers, dynamic magnetic valve cores, springs and gasket structures; among them, the springs serve as auxiliary control components for the opening of the dynamic magnetic valve core, and are the main components for resetting the dynamic magnetic valve core; the springs designed previously only had a hole in the middle so that the dynamic magnetic valve core could more easily press the springs to cause them to deform elastically; but in actual use, it was found that the deformability of the springs was small, and the electromagnetic component needed to give the dynamic magnetic valve core a large magnetic attraction force to compress the springs to deform, which was more energy-consuming; and this would in turn lead to insufficient stability and reliability in flow and pressure control.

[0004] In order to solve the above problems, the applicant recently applied for a double-elastic precision flow control mechanism, which is based on the previous micro-flow valve structure design, but the structure requires the design of a more complex pilot hole on the base, and the structure is only suitable for small flow control and is difficult to meet the control requirements for large flow. Summary of the Invention

[0005] The purpose of the present invention is to provide a double-elastic precision flow control mechanism in order to overcome the deficiencies of the prior art.

[0006] To achieve the above-mentioned purpose, the technical solution adopted by the present invention is: a double-elastic precision flow control mechanism, comprising a base, a valve cover, a dynamic magnetic valve core, a spring, a spring and an electromagnetic assembly; a flow channel and a flow channel nozzle are provided on the base, the valve cover is provided on the base, the dynamic magnetic valve core passes through the valve cover, the upper end of the dynamic magnetic valve core cooperates with the electromagnetic assembly, the lower end of the dynamic magnetic valve core cooperates with the flow channel nozzle, the spring is located in the valve cover, and the spring is provided on the base; when the dynamic magnetic valve core is pressed on the flow channel nozzle, the flow channel is closed, and the dynamic magnetic valve core compresses the spring downward; when the dynamic magnetic valve core leaves the flow channel nozzle upward, the flow channel flows, and the dynamic magnetic valve core squeezes the spring upward.

[0007] Preferably, a gasket is provided at the bottom of the dynamic magnetic valve core, and the gasket cooperates with the flow channel nozzle.

[0008] Preferably, a gasket is provided on the top of the flow channel nozzle, and the gasket cooperates with the bottom of the dynamic magnetic valve core.

[0009] Preferably, a strain space is provided in the valve cover, and the strain space is located on the upper side of the spring.

[0010] Preferably, the dynamic magnetic valve core passes through the spring sheet, and the dynamic magnetic valve core is provided with a shoulder structure cooperating with the spring sheet.

[0011] Preferably, the spring sleeve is arranged on the flow channel nozzle.

[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 provides a dual-elastic solenoid valve structure. The dynamic magnetic valve core uses the dual elastic force of the shrapnel and the spring to reduce the starting voltage for controlling the opening of the dynamic magnetic valve core, reduce energy consumption, and make the valve opening and closing action smoother with less hysteresis. The overall structure is simple and novel, and does not require a complex pilot hole structure. The dynamic magnetic valve core adopts a columnar structure and is combined with the electromagnetic component to accurately control the flow rate in the range of 0-120SLPM. 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 This is a structural diagram of the dual-elastic precision flow control mechanism described in the present invention. DETAILED DESCRIPTION

[0016] The present invention will be further described in detail below with reference to the accompanying drawings and specific embodiments.

[0017] like Figure 1 As shown, the double-elastic precision flow control mechanism described in the present invention includes a base 1, a valve cover 2, a dynamic magnetic valve core 3, a spring 4, a spring 9 and an electromagnetic assembly 6; the base 1 is provided with a flow channel 7 and a flow channel nozzle 8, the flow channel 7 passes through the flow channel nozzle 8, the spring 9 is sleeved on the flow channel nozzle 8, and the flow channel 7 is divided into two parts: an air inlet and an air outlet.

[0018] The valve cover 2 is airtightly mounted and fixed on the base 1 , the dynamic magnetic valve core 3 passes through the valve cover 2 , the electromagnetic assembly 6 is located on the upper side of the valve cover 2 , and a sealing component that cooperates with the dynamic magnetic valve core 3 is provided between the electromagnetic assembly 6 and the valve cover 2 .

[0019] The upper end of the dynamic magnetic valve core 3 cooperates with the electromagnetic assembly 6, the spring 4 is located in the valve cover 2, and a strain space 10 is provided in the valve cover 2. The strain space 10 is located on the upper side of the spring 4. The dynamic magnetic valve core 3 passes through the spring 4. The dynamic magnetic valve core 3 has a shoulder structure that cooperates with the spring 4. The spring 4 can be a circular sheet or other shapes. The periphery of the spring 4 is close to the inner wall of the valve cover 2.

[0020] A gasket 5 is provided at the bottom of the lower end of the dynamic magnetic valve core 3. The gasket 5 is partially buried in the dynamic magnetic valve core 3 to improve the installation strength of the gasket. The gasket 5 is a flexible gasket, such as Teflon, nitrile rubber, silicone, etc.; the gasket 5 moves with the dynamic magnetic valve core 3 so that the gasket 5 cooperates with the flow channel nozzle 8.

[0021] The gasket 5 can also be embedded in the top of the flow channel nozzle 8, and the gasket 5 is matched with the bottom of the lower end of the dynamic magnetic valve core 3.

[0022] When the electromagnetic assembly 6 is energized, a magnetic field is generated, which in turn drives the dynamic magnetic valve core 3 to move slightly up and down. When the gasket 5 on the dynamic magnetic valve core 3 is pressed onto the flow channel nozzle 8, the flow channel 7 is closed. At this time, the dynamic magnetic valve core 3 compresses the spring 9 downward, and the spring 9 generates a reaction force on the dynamic magnetic valve core 3, which can reduce the starting voltage for opening the dynamic magnetic valve core 3.

[0023] When the dynamic magnetic valve core 3 moves upward away from the flow channel nozzle 8, the flow channel 7 flows, and the dynamic magnetic valve core 3 moves upward while pressing the spring 4, so that the spring 4 generates a downward elastic force on the dynamic magnetic valve core 3. When the fluid passes between the dynamic magnetic valve core 3 and the base 1, the Bernoulli effect will generate a downward Bernoulli force on the dynamic magnetic valve core 3; in the initial stage of the rise of the dynamic magnetic valve core 3, the gasket 5 will also generate an upward deformation recovery force on the dynamic magnetic valve core 3; the electromagnetic component changes the displacement of the dynamic magnetic valve core 3 by changing the current, and then controls the opening between the bottom of the dynamic magnetic valve core 3 and the flow channel nozzle 8. Different openings will produce different flow rates, thereby achieving the effect of precise flow control.

[0024] 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 double-elastic precision flow control mechanism, characterized by: The invention comprises a base (1), a valve cover (2), a dynamic magnetic valve core (3), a spring (4), a spring (9) and an electromagnetic assembly (6); a flow channel (7) and a flow channel nozzle (8) are provided on the base (1); the valve cover (2) is provided on the base (1); the dynamic magnetic valve core (3) passes through the valve cover (2); the upper end of the dynamic magnetic valve core (3) cooperates with the electromagnetic assembly (6); the lower end of the dynamic magnetic valve core (3) cooperates with the flow channel nozzle (8); the spring (4) is located in the valve cover (2); and the spring (9) is provided on the base (1); when the dynamic magnetic valve core (3) is pressed onto the flow channel nozzle (8), the flow channel (7) is closed, and the dynamic magnetic valve core (3) compresses the spring (9) downward; when the dynamic magnetic valve core (3) leaves the flow channel nozzle (8) upward, the flow channel (7) flows, and the dynamic magnetic valve core (3) squeezes the spring (4) upward.

2. The dual-elastic precision flow control mechanism according to claim 1, characterized in that: A gasket (5) is provided at the bottom of the dynamic magnetic valve core (3), and the gasket (5) cooperates with the flow channel nozzle (8).

3. The dual-elastic precision flow control mechanism according to claim 1, characterized in that: A gasket (5) is provided on the top of the flow channel nozzle (8), and the gasket (5) cooperates with the bottom of the dynamic magnetic valve core (3).

4. The dual-elastic precision flow control mechanism according to claim 1, characterized in that: A strain space (10) is provided in the valve cover (2), and the strain space (10) is located on the upper side of the elastic sheet (4).

5. The dual-elastic precision flow control mechanism according to claim 1, characterized in that: The dynamic magnetic valve core (3) passes through the spring piece (4), and the dynamic magnetic valve core (3) has a shaft shoulder structure that cooperates with the spring piece (4).

6. The dual-elastic precision flow control mechanism according to claim 1, characterized in that: The spring (9) is sleeved on the flow channel nozzle (8).

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