Check electromagnetic valve

Abstract

The utility model discloses a non-return electromagnetic valve which comprises a valve body and a valve element, an inlet flow channel is provided with an umbrella-shaped non-return assembly only allowing media to flow to an outlet flow channel from the inlet flow channel, the umbrella-shaped non-return assembly comprises a base, a valve seat and an umbrella-shaped membrane, the valve seat is arranged on the base, a movable cavity is formed between the valve seat and the base, and the umbrella-shaped membrane is arranged in the movable cavity. The umbrella-shaped membrane is movably arranged in the movable cavity, and the umbrella-shaped membrane abuts against the valve seat or the base under the action of a flowing medium, so that a circulation state and a non-return state are formed, through the arrangement, the umbrella-shaped non-return assembly is arranged, and the umbrella-shaped non-return assembly in the electromagnetic valve is assembled at the position of a water inlet port of the electromagnetic valve; when water flows out normally, a front-end sealing piece in the umbrella-shaped non-return assembly is pushed away, water flows out normally from a water outlet, when the water flows back from the water outlet reversely, an umbrella-shaped membrane is deformed under the acting force of the water, the umbrella-shaped membrane is tightly attached to the surface of the valve seat, a flow channel is blocked, the water cannot flow in, and finally the non-return effect is achieved.

Description

Technical Field

[0001] The present application relates to the technical field of string knobs, and in particular to a check solenoid valve. Background Art

[0002] The solenoid valve is an industrial device controlled by electromagnetics. It is a basic automation component used to control fluids and is an actuator. The water inlet solenoid valves currently on the market have basically the same basic structure and working principle.

[0003] In the existing technology, the water inlet solenoid valves in the industry are all one-way switches. Water flows in from the water inlet and flows out from the water outlet. When the water flows in the opposite direction from the water outlet, the water pressure at the water outlet is greater than the water pressure at the water inlet. The water pressure pushes up the sealing component inside the solenoid valve, and the valve opens, causing water to flow into the valve body and out of the water inlet, causing the customer's entire machine to fail. If the problem of reverse water flow is to be solved, a check valve or a button-type check valve must be separately assembled at the rear end of the water outlet of the water inlet solenoid valve. This method not only increases the cost, but also has complicated procedures and occupies more internal space of the entire machine. Therefore, there is room for improvement. Summary of the Invention

[0004] In response to the above problems, the present application proposes a check solenoid valve, which is provided with an umbrella-shaped check component, and the umbrella-shaped check component in the solenoid valve is assembled at the water inlet port of the solenoid valve. When the water flows out normally, the front end seal of the umbrella-shaped check component is pushed open, and the water flows out normally from the water outlet. When the water flows reversely from the water outlet, the umbrella-shaped diaphragm therein is deformed by the force of the water flow and fits tightly with the valve seat surface, blocking the flow channel and preventing the water from flowing in, thereby finally forming a check effect. The check solenoid valve is specifically implemented through the following technical solutions:

[0005] A check solenoid valve comprises: a valve body and a valve core, the valve body being provided with a channel for medium passing therethrough, the valve core being arranged in the valve body, and the valve core dividing the channel into an inlet flow channel and an outlet flow channel, the inlet flow channel being provided with an umbrella-shaped check assembly which only allows the medium to pass from the inlet flow channel to the outlet flow channel, the umbrella-shaped check assembly comprising a base, a valve seat and an umbrella-shaped diaphragm, the valve seat being arranged on the base, and an active cavity being formed between the valve seat and the base, the umbrella-shaped diaphragm being movably arranged in the active cavity, and the umbrella-shaped diaphragm being respectively abutted against the valve seat or the base under the action of the flowing medium, thereby forming a flow state and a check state.

[0006] It is further configured that the umbrella-shaped diaphragm includes an umbrella head and an umbrella handle, the valve seat is provided with a movable hole and a hydrophobic port, the umbrella handle is movably arranged in the movable hole, and the vertical projection of the umbrella head covers the hydrophobic port. Through this configuration, the sealing performance between the umbrella-shaped diaphragm and the valve seat is improved.

[0007] It is further configured that the area of ​​the umbrella head is not less than the cross-sectional area of ​​the valve seat, and the area of ​​the umbrella head is less than the cross-sectional area of ​​the base. Through this configuration, it is ensured that the umbrella head can completely close the valve seat, while the umbrella head cannot completely close the base.

[0008] It is further configured that the umbrella head has a certain elastic plastic material, the umbrella head includes a convex surface and a concave surface, and the convex surface and the concave surface can be converted into each other. When the umbrella head is in the flow state, the convex surface faces the valve seat, and when the umbrella head is in the check state, the convex surface faces the base. Through this configuration, the umbrella head always greets the water flow with the convex surface, reducing resistance.

[0009] It is further configured that the base is configured as a circular sleeve that is adapted to the inner diameter of the inlet flow channel, and the base is sleeved on the outer periphery of the valve seat. The valve seat is provided with connecting ribs, the inner ends of the connecting ribs are connected toward the movable hole, and the outer ends are evenly distributed and connected to the outer periphery of the valve seat. The gaps between the multiple connecting ribs are the drain ports. Through this configuration, the medium passing capacity of the valve seat is guaranteed to prevent fluid flow restriction.

[0010] It is further provided that a pre-filter device is provided at the front end of the inlet flow channel, and the pre-filter device includes a filter cover, a curved filter element and a base. The filter cover is provided on the base, and the curved filter element is provided between the filter cover and the base, and the raised curved surface of the curved filter element is facing the water inlet of the water inlet flow channel. Through this arrangement, the filtered impurities are effectively prevented from adhering to the front end of the water inlet to cause a reduction in flow rate.

[0011] It is further provided that a water outlet is provided on the base at a vertical projection position corresponding to the most raised part of the arc-shaped filter element. This arrangement effectively prevents filtered impurities from adhering to the front end of the water inlet and causing a reduction in flow.

[0012] It is further configured that the valve core is configured as an anti-water hammer valve core. Through this configuration, the mechanical damage to the solenoid valve caused by the water hammer phenomenon is reduced.

[0013] The check solenoid valve described above is configured with an umbrella-shaped check assembly, and the umbrella-shaped check assembly inside the solenoid valve is assembled at the water inlet port of the solenoid valve. When water flows out normally, the front end seal of the umbrella-shaped check assembly is pushed open and the water flows out normally from the water outlet. When the water flows reversely from the water outlet, the umbrella-shaped diaphragm therein is deformed by the force of the water flow and fits tightly against the valve seat surface, blocking the flow channel and preventing water from flowing in, thereby ultimately forming a check effect. BRIEF DESCRIPTION OF THE DRAWINGS

[0014] In order to more clearly illustrate the technical solutions in the embodiments of the present application, the following briefly introduces the drawings required for use in the embodiments or descriptions of the prior art. Obviously, the drawings described below are only some embodiments of the present application. For ordinary technicians in this field, other drawings can be obtained based on these drawings without any creative work.

[0015] Figure 1 A schematic diagram of the structure of a check solenoid valve provided in an embodiment of the present application;

[0016] Figure 2 A front cross-sectional view of a check solenoid valve provided in an embodiment of the present application;

[0017] Figure 3 An exploded view of an umbrella-shaped check valve assembly in a check solenoid valve according to an embodiment of the present application;

[0018] Figure 4 In the non-return solenoid valve provided in the embodiment of the present application Figure 2 Enlarged view of part A in the middle.

[0019] Among them, the reference numerals in the figures are:

[0020] 1. Valve body; 2. Valve core; 3. Channel; 4. Inlet flow channel; 5. Outlet flow channel; 6. Umbrella-shaped check assembly; 7. Base; 8. Valve seat; 9. Umbrella-shaped diaphragm; 10. Umbrella head; 11. Umbrella handle; 12. Movable hole; 13. Drain port; 14. Convex surface; 15. Concave surface; 16. Round sleeve; 17. Connecting rib; 18. Pre-filter device; 19. Filter cover; 20. Curved filter element; 21. Base; 22. Anti-water hammer valve core. DETAILED DESCRIPTION

[0021] In order to make the technical problems, technical solutions and beneficial effects to be solved by this application more clearly understood, the present application is further described in detail below with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are only used to explain this application and are not intended to limit this application.

[0022] The appearance of the above words in various places in the specification does not necessarily refer to the same embodiment, nor does it mean independent or alternative embodiments that are mutually exclusive with other embodiments. It is understood explicitly and implicitly by those skilled in the art that the embodiments described herein can be combined with other embodiments.

[0023] The present application is now further described with reference to the accompanying drawings and specific embodiments:

[0024] Please also refer to Figures 1 to 4A check solenoid valve comprises: a valve body 1 and a valve core 2, the valve body 1 is provided with a channel 3 for medium passing through, the valve core 2 is arranged in the valve body 1, and the valve core 2 separates the channel 3 into an inlet flow channel 4 and an outlet flow channel 5, the inlet flow channel 4 is provided with an umbrella-shaped check assembly 6 that only allows the medium to pass from the inlet flow channel 4 to the outlet flow channel 5, the umbrella-shaped check assembly 6 comprises a base 7, a valve seat 8 and an umbrella-shaped diaphragm 9, the valve seat 8 is arranged on the base 7, and an active cavity is formed between the valve seat 8 and the base 7, the umbrella-shaped diaphragm 9 is movably arranged in the active cavity, and the umbrella-shaped diaphragm 9 is respectively against the valve seat 8 or the base 7 under the action of the flowing medium, thereby forming a flow state and a check state.

[0025] See also Figures 1 to 4In this embodiment, the umbrella-shaped diaphragm 9 includes an umbrella head 10 and an umbrella handle 11. The valve seat 8 is provided with a movable hole 12 and a drain port 13. The umbrella handle 11 is movably arranged in the movable hole 12, and the umbrella head 10 vertically projects over the drain port 13. The drain port 13 is completely blocked by the umbrella-shaped diaphragm 9 in the non-return state, thereby realizing the non-return function of the solenoid valve. In the flow state, the umbrella-shaped diaphragm 9 must be smaller than the cross-sectional area of ​​the base 7 and cannot completely block the flow channel 3 of the base 7 to prevent complete blockage in the normal flow state. Therefore, the area of ​​the umbrella head 10 is not less than the cross-sectional area of ​​the valve seat 8. The area of ​​the umbrella head 10 is smaller than the cross-sectional area of ​​the base 7; the umbrella head 10 is made of a plastic material with a certain elasticity, and the umbrella head 10 includes a convex surface 14 and a concave surface 15, and the convex surface 14 and the concave surface 15 can be converted to each other. When the umbrella head 10 is in the flow state, the convex surface 14 faces the valve seat 8, and when the umbrella head 10 is in the check state, the convex surface 14 faces the base 7. In the flow state, the fluid flows from the inlet flow channel 4 to the outlet flow channel 5 and impacts the umbrella head 10, so that the convex surface 14 of the umbrella head 10 faces the inlet flow channel 4. The arc surface of the convex surface 14 meets the scouring of the water flow, which can effectively reduce In order to reduce the blocking ability of water flow, reduce the flow restriction and maintain the flow rate, in order to achieve the above-mentioned function of the umbrella head 10, the umbrella head 10 is usually made of rubber material with a certain deformation ability; the base 7 is set to a circular sleeve 16 that is adapted to the inner diameter of the inlet flow channel 4, and the base 7 is sleeved on the outer periphery of the valve seat 8, and the valve seat 8 is provided with a connecting rib 17, the inner end of the connecting rib 17 is connected to the movable hole 12, and the outer end is evenly distributed and connected to the outer periphery of the valve seat 8, and the gaps between the multiple connecting ribs 17 are the drain ports 13; the front end of the inlet flow channel 4 is also provided with a pre-filter device 18, and the pre-filter device 18 is provided. The filtering device 18 includes a filter cover 19, a curved filter element 20 and a base 21. The filter cover 19 is arranged on the base 21, and the curved filter element 20 is arranged between the filter cover 19 and the base 21, and the raised curved surface of the curved filter element 20 faces the water inlet of the water inlet channel. During the use of the curved filter element 20, because the raised side of the curved filter element 20 faces the water inlet, therefore, when impurities gradually accumulate on the curved filter element 20, a water outlet is provided on the base 21 corresponding to the vertical projection position of the most raised part of the curved filter element 20; the valve core 2 is set as a water hammer proof valve core 22.

[0026] The above description is only a preferred embodiment of the present application and is not intended to limit the present application. Any modifications, equivalent replacements and improvements made within the spirit and principles of the present application should be included in the scope of protection of the present application.

Claims

1. A check solenoid valve, comprising: A valve body (1) and a valve core (2), wherein the valve body (1) is provided with a channel (3) for medium to pass through, the valve core (2) is provided in the valve body (1), and the valve core (2) divides the channel (3) into an inlet flow channel (4) and an outlet flow channel (5), and is characterized in that: the inlet flow channel (4) is provided with an umbrella-shaped check assembly (6) that only allows the medium to pass from the inlet flow channel (4) to the outlet flow channel (5), the umbrella-shaped check assembly (6) includes a base (7), a valve seat (8) and an umbrella-shaped diaphragm (9), the valve seat (8) is provided on the base (7), and an active cavity is formed between the valve seat (8) and the base (7), the umbrella-shaped diaphragm (9) is movably provided in the active cavity, and the umbrella-shaped diaphragm (9) is respectively abutted against the valve seat (8) or the base (7) under the action of the flowing medium, thereby forming a flow state and a check state.

2. A check solenoid valve according to claim 1, characterized in that The umbrella-shaped diaphragm (9) comprises an umbrella head (10) and an umbrella handle (11); a movable hole (12) and a drain port (13) are provided on the valve seat (8); the umbrella handle (11) is movably arranged in the movable hole (12), and the vertical projection of the umbrella head (10) covers the drain port (13).

3. A check solenoid valve according to claim 2, characterized in that : The area of ​​the umbrella head (10) is not less than the cross-sectional area of ​​the valve seat (8), and the area of ​​the umbrella head (10) is less than the cross-sectional area of ​​the base (7).

4. A check solenoid valve according to claim 2, characterized in that The umbrella head (10) is made of a plastic material with a certain elasticity. The umbrella head (10) includes a convex surface (14) and a concave surface (15), and the convex surface (14) and the concave surface (15) can be converted into each other. When the umbrella head (10) is in the flow state, the convex surface (14) faces the valve seat (8), and when the umbrella head (10) is in the check state, the convex surface (14) faces the base (7).

5. A check solenoid valve according to claim 2, characterized in that The base (7) is configured as a circular sleeve (16) adapted to the inner diameter of the inlet flow channel (4), and the base (7) is sleeved on the outer periphery of the valve seat (8). The valve seat (8) is provided with a connecting rib (17), the inner end of the connecting rib (17) is connected toward the movable hole (12), and the outer end is evenly distributed and connected to the outer periphery of the valve seat (8), and the gaps between the multiple connecting ribs (17) are the drain ports (13).

6. A check solenoid valve according to claim 1, characterized in that The front end of the inlet flow channel (4) is also provided with a pre-filter device (18), the pre-filter device (18) comprises a filter cover (19), an arc-shaped filter element (20) and a base (21), the filter cover (19) is provided on the base (21), the arc-shaped filter element (20) is provided between the filter cover (19) and the base (21), and the convex arc surface of the arc-shaped filter element (20) faces the water inlet of the water inlet flow channel.

7. A check solenoid valve according to claim 6, characterized in that A water outlet is provided on the base (21) at a vertical projection position corresponding to the most raised portion of the arc-shaped filter element (20).

8. The check solenoid valve according to claim 1, characterized in that The valve core (2) is configured as a water hammer proof valve core (22).

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