A precise flow control structure for a solenoid valve

Abstract

The present invention discloses a precise flow control structure for a solenoid valve, which includes an electromagnetic coil, an elastic member, a magnetic core and a valve core; the magnetic core is located above the valve core, the electromagnetic coil generates an upward suction force on the magnetic core, and the elastic member generates a downward elastic force on the magnetic core; the upper surface of the valve core has an annular retaining wall and a plurality of protrusions, a plurality of diversion openings are provided on the annular retaining wall, the protrusions are located inside the annular retaining wall, a flow channel is formed between the protrusions and the retaining ring structure, and the flow channel is communicated with the diversion openings; the protrusions have flow channel holes that penetrate up and down, and a diversion groove is also provided on the upper surface of the protrusions, and the flow channel holes are communicated with the flow channel through the diversion groove; this solution optimizes the structure of the valve core, and a diversion structure is provided on the valve core. Before the magnetic core is opened, the diversion structure guides the fluid, so that the fluid flows in a predetermined direction, balances the fluid pressure around the valve core, enables the magnetic core to be opened smoothly without generating skew, and ensures the stability of the solenoid valve during operation.

Description

Technical Field

[0001] The present invention relates to a precise flow control structure for a solenoid valve. Background Art

[0002] A solenoid valve is a main component for fluid flow control. Generally, the solenoid valve attracts a magnetic core through an electromagnetic coil, and controls the flow rate through the opening degree of the magnetic core. Since the valve core admits air from all around, sometimes the air pressure around is not uniform, resulting in possible deflection of the magnetic core at the moment of opening, which affects the working stability of the solenoid valve. Summary of the Invention

[0003] The purpose of the present invention is to provide a precise flow control structure for a solenoid valve to overcome the deficiencies of the prior art.

[0004] To achieve the above object, the technical solution adopted by the present invention is: a precise flow control structure for a solenoid valve, comprising an electromagnetic coil, an elastic member, a magnetic core and a valve core; the magnetic core is located above the valve core, the electromagnetic coil generates an upward suction force on the magnetic core, and the elastic member generates a downward elastic force on the magnetic core; the upper surface of the valve core has an annular retaining wall and a convex platform, multiple flow guiding openings are provided on the annular retaining wall, the convex platform is located inside the annular retaining wall, a flow channel is formed between the convex platform and the retaining ring structure, and the flow channel is communicated with the flow guiding openings; the convex platform has a flow channel hole penetrating up and down, and a flow guiding groove is further provided on the upper surface of the convex platform, and the flow channel hole is communicated with the flow channel through the flow guiding groove.

[0005] Preferably, both the annular retaining wall and the convex platform are integrally formed with the valve core, formed by machining on the upper surface of the valve core, and the top surfaces of the annular retaining wall and the convex platform are flush.

[0006] Preferably, the upper surface of the valve core has multiple convex platforms, each convex platform is provided with a flow channel hole, the multiple flow guiding openings and the multiple convex platforms are evenly arranged around the axis of the valve core, and the number of the flow guiding openings is equal to the number of the convex platforms.

[0007] Preferably, the flow guiding groove points to the exact middle between two adjacent flow guiding openings.

[0008] Preferably, the convex platform is in a fan-shaped structure with an arc facing outward, and the flow guiding groove leads to the arc side of the convex platform.

[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 core, and a flow guiding structure is provided on the valve core. Before the magnetic core is opened, the flow guiding structure guides the fluid, enabling the fluid to flow in a predetermined direction, balancing the fluid pressure around the valve core, allowing the magnetic core to open smoothly without deflection, and ensuring the working stability of the solenoid valve. Brief Description of the Drawings

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

[0012] Attached Figure 1 is a schematic diagram of a precision flow control structure of a solenoid valve according to the present invention;

[0013] Attached Figure 2 is a top view structural schematic diagram of the valve core according to the present invention. Specific embodiments

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

[0015] As Figure 1-2 shown, a precision flow control structure of a solenoid valve according to the present invention includes an electromagnetic coil, an elastic member, a magnetic core 1 and a valve core 2; the magnetic core 1 is located above the valve core 2, and the electromagnetic coil generates an upward suction force F1 on the magnetic core 1. After the magnetic core 1 moves upward, it will compress the elastic member, so that the elastic member generates a downward elastic force F2 on the magnetic core 1. When the fluid passes between the magnetic core 1 and the valve core 2, it will generate a downward acting force F3 on the magnetic core 1 due to the Bernoulli effect. F1 overcomes F2 and F3 to control the opening degree d of the magnetic core 1; different opening degrees d will generate different flow rates, achieving the function of precisely controlling the flow rate.

[0016] The upper surface of the valve core 2 has an annular retaining wall 3 and four bosses 4. Four flow guiding openings 5 are provided on the annular retaining wall 3. The four bosses 4 are all located inside the annular retaining wall 3. The four flow guiding openings 5 and the four bosses 4 are evenly arranged around the axis of the valve core 2. A flow channel 6 is formed between the boss 4 and the retaining ring structure 3, and the flow channel 6 is communicated with the flow guiding opening 5; the annular retaining wall 3 and the boss 4 are both integral structures with the valve core 2, and are formed by machining on the upper surface of the valve core 2, and the top surfaces of the annular retaining wall 3 and the boss 4 are flush, so that the magnetic core 1 can be synchronously pressed on the top surfaces of the annular retaining wall 3 and the boss 4.

[0017] The boss 4 has a flow channel hole 7 penetrating through the valve core 2. The upper surface of the boss 4 is also provided with a flow guiding groove 8. The flow guiding groove is a slender structure, and its size is at the micron level; the boss 4 is a fan-shaped structure with an arc facing outward, so that the flow channel 6 is an arc-shaped flow channel. The flow guiding groove 8 leads to the arc side of the boss 4 and points to the middle between two adjacent flow guiding openings 5. The flow channel hole 7 is communicated with the flow channel 6 through the flow guiding groove 8, further improving the flow balance of the fluid and stabilizing the flow rate. The fluid can be gas or liquid.

[0018] The setting of multiple bosses 4 is only one implementation mode of this solution. The boss 4 can also be an integral boss structure. Multiple holes can be provided on the integral boss, and each hole corresponds to a diversion groove; or only one hole can be provided in the exact middle of the integral boss, and 4 or 3 diversion grooves are symmetrically arranged on the sides; for other diversion structures not listed in this embodiment, any equivalent transformation based on the core idea of the diversion structure of this solution should be covered within the protection scope of this application.

[0019] The above embodiments are only for explaining the technical concept and characteristics of the present invention, and the purpose is to enable those who are familiar with this technology to understand the content of the present invention and implement it. It cannot be used to limit the protection scope of the present invention. Any equivalent changes or modifications made according to the spirit and essence of the present invention should be covered within the protection scope of the present invention.

Claims

1. A precise flow control structure for a solenoid valve, characterized in that: It includes an electromagnetic coil, an elastic member, a magnetic core (1) and a valve core (2); the magnetic core (1) is located above the valve core (2), the electromagnetic coil generates an upward suction force on the magnetic core (1), and the elastic member generates a downward elastic force on the magnetic core (1); the upper surface of the valve core (2) has an annular retaining wall (3) and a boss (4), multiple flow guiding openings (5) are provided on the annular retaining wall (3), the boss (4) is located inside the annular retaining wall (3), a flow channel (6) is formed between the boss (4) and the annular retaining wall (3), and the flow channel (6) is communicated with the flow guiding openings (5); the boss (4) has a flow channel hole (7) penetrating up and down, and a flow guiding groove (8) is also provided on the upper surface of the boss (4), and the flow channel hole (7) is communicated with the flow channel (6) through the flow guiding groove (8).

2. The solenoid valve precise flow control structure according to claim 1, wherein: Both the annular retaining wall (3) and the boss (4) are integrally structured with the valve core (2), formed by machining on the upper surface of the valve core (2), and the top surfaces of the annular retaining wall (3) and the boss (4) are flush.

3. The solenoid valve precise flow control structure according to claim 1, characterized in that: The upper surface of the valve core (2) has multiple bosses (4), each boss (4) is provided with a flow channel hole (7) and a flow guiding groove (8), the multiple flow guiding openings (5) and the multiple bosses (4) are evenly arranged around the axis of the valve core (2), and the number of the flow guiding openings (5) is equal to the number of the bosses (4).

4. The precision flow control structure of the solenoid valve according to claim 3, characterized in that: The flow guiding groove (8) points to the exact middle between two adjacent flow guiding openings (5).

5. The precision flow control structure of the solenoid valve according to claim 3, characterized in that: The boss (4) is in a fan-shaped structure with an arc facing outward, and the flow guiding groove (8) leads to the arc side of the boss (4).

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